NZ744099B2 - Anti-tumor agent containing immunomodulator and anti-tumor effect potentiator - Google Patents

Abstract

Provided is use of a DNA function inhibitor and an immunomodulator for the manufacture of an antitumor agent for the treatment of cancer, wherein the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5; and wherein the immunomodulator is an anti-PD-1 antibody or an anti-PD-L1 antibody or a combination thereof, and the anti-PD-1 antibody is nivolumab or pembrolizumab, and the anti-PD-L1 antibody is atezolizumab, durvalumab, or avelumab; and wherein cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer. dulator is an anti-PD-1 antibody or an anti-PD-L1 antibody or a combination thereof, and the anti-PD-1 antibody is nivolumab or pembrolizumab, and the anti-PD-L1 antibody is atezolizumab, durvalumab, or avelumab; and wherein cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

Description

DESCRIPTION ANTI-TUMOR AGENT CONTAINING MODULATOR AND ANTI-TUMOR EFFECT POTENTIATOR [Field of the Invention] The present invention relates to an antitumor agent, an antitumor effect potentiator, and a kit preparation, containing a DNA on inhibitor and an immunomodulator.

[Background of the Invention] As a novel therapeutic agent focusing on DNA replication ism of cells, a drug ning trifluridine (also known as a,a,a-trifluorothymidine; hereinafter, also referred to as "FTD") and tipiracil hydrochloride (chemical name: 5-chloro [(2-iminopyrrolidineyl)methyl]pyrimidine-2,4(1H,3H)-dione hydrochloride; hereinafter, also ed to as "TPI") is publicly known. FTD exhibits an antitumor effect due to both inhibition of DNA synthesis by thymidylate productioninhibiting activity and inhibition of DNA function by incorporation into DNA. TPI has a ine phosphorylase inhibiting activity, and suppresses decomposition of FTD by thymidine orylase in the living body, thereby potentiating the antitumor effect of FTD (Patent Literature 1).

Currently, an antitumor agent containing FTD and TPI in a molar ratio of 1 : 0.5 (hereinafter also referred to as "FTD/TPI combination drug") is under development as a therapeutic agent for a solid cancer. It was approved as a therapeutic agent for TH0098 metastatic colorectal cancer in Japan and the United States (Non Patent Literatures l and 2).

Also, in recent years, deoxyuridine triphosphatase (hereinafter, also referred to as "dUTPase") has been drawing attentions as a novel action mechanism of a cancer treatment focusing on DNA replication mechanism, t Literature 2). dUTPase specifically recognizes deoxyuridine triphosphate (dUTP) only, is one of the enzymes which decompose the same to deoxyuridine osphate (dUMP) and pyrophosphoric acid, and also specifically recognizes and decomposes fluorodeoxyuridine triphosphate (FdUTP) such as S—fluorouracil (hereinafter, also referred to as "5-FU") metabolized from a fluorinated pyrimidine antimetabolite. It is known that when a fluorinated pyrimidine antimetabolite and a dUTPase inhibitor act simultaneously on cells, a dUTP level and an FdUTP level in cells increase and uently the incorporation of FdUTP into DNA profoundly increases, causing inhibition of DNA function (Patent Literature 3).

Conventionally, 5-FU and derivatives thereof widely used in a clinical practice are phosphorylated in the body to form fluorodeoxyuridine monophosphate (FdUMP), suppress ylate synthesis, and inhibit DNA synthesis. Further, S—FU and derivatives f are metabolized into uridine triphosphate (FUTP) in the cell, and incorporated into RNA to cause inhibition of RNA function. FdUMP produced in the body is known to be incorporated into DNA as FdUTP, but an amount thereof is too small to cause the inhibition of DNA function (Non Patent Literature 3). Thus, S-FU and derivatives thereof are drugs ting an antitumor effect via inhibition of DNA synthesis and inhibition of RNA on, and are not themselves drugs exhibiting an antitumor effect via TH0098 inhibition of DNA function, thus being different from the above FTD/TPI combination drug, and also from the drug containing both a dUTPase inhibitor and a fluorinated pyrimidine antimetabolite.

On the other hand, currently, development of cancer immunotherapy has been advanced as one of the new methodology of cancer therapy.

Activation of adaptive immune se starts from association of an antigen peptide—MHC complex with a T cell receptor (TCR). The association is r ted by ulation or coinhibition by an association between B7 family that is a costimulatory molecule and CD28 family that is a receptor thereof. Specifically, in order to activate T cells in an antigen—specific manner, two characteristic ing events are required, and T cells receiving only antigen stimulation without receiving costimulation from the B7 family becomes silent by anergy, leading to induce immune tolerance.

Cancer cells suppress activation of antigen-specific T cells using this mechanism, y escaping from the immune surveillance and maintaining growth. Therefore, it is considered to be ive for cancer treatment to induce an antitumor immune response in the living body of a cancer patient by enhancing costimulation and blocking coinhibition, and to control immune escape of tumor.

Various cancer immunotherapies targeting costimulatory molecule latory costimulatory molecule) or coinhibitory molecule (inhibitory costimulatory molecule) has been proposed (Non Patent Literature 4). For example, nivolumab (human IgG4 monoclonal antibody on human PD—l) has been used in treatment of, for example, ant melanoma, as an immunomodulator which activates T cells TH0098 by inhibiting a binding between PD—l and a ligand thereof (PD-L1 and PD—LZ) (Patent Literature 4 and Non Patent Literature 5).

Furthermore, a ation therapy by combination of a cancer immunotherapy with other cancer ent method(s) has also been studied, and, for example, a combination therapy ing a PD-l binding antagonist and S—FU has been reported (Patent Literature 5).

However, as described above, fluorinated pyrimidine antimetabolites such as S—FU are not such drugs as exhibiting an antitumor effect via inhibition of DNA function. Thus, there has been so far no attempt for the combination therapy between a DNA function tor and an immunomodulator such as anti-PD-l antibody.

[Citation List] [Patent Literatures] Patent Literature 1: W0 96/30346 Patent Literature 2: Patent Literature 3: Patent Literature 4: Patent Literature 5: [Non Patent Literatures] Non Patent Literature 1: Invest New Drugs. 2008; 26(5): 445—54.

Non Patent Literature 2: Lancet Oncol. 2012; : 01.

Non Patent Literature 3: Mol Pharmacol. 2004; 66(3): 620—6.

Non Patent Literature 4: Nat Rev Cancer. 2012; 12(4): 252—64.

Non Patent Literature 5: N Engl J Med. 2012; 366(26): 2443—54.

TH0098 [Summary of the ion] [Problems to be solved by the Invention] An object of the present invention is to provide a novel cancer treatment method with d side effects, while showing remarkably excellent antitumor effect.

[Means for Solving the Problem] The present inventor has studied an antitumor effect by using - a drug containing FTD which is a DNA function inhibitor, or a drug containing both a dUTPase tor and a fluorinated pyrimidine antimetabolite, and — an anti—PD—l antibody or an anti-PD—Ll antibody which is an immunomodulator, in ation, and consequently found that an antitumor effect is r remarkably potentiated without causing serious side effects, as compared to the case of using either of these drugs Thus, the present invention provides the ing inventions [l] to [81]: An mor agent containing administering a DNA function inhibitor and an immunomodulator in combination.

The antitumor agent according to [1], wherein the DNA function tor is a drug containing trifluridine, or a drug containing a deoxyuridine triphosphatase inhibitor and a fluorinated pyrimidine antimetabolite.

The antitumor agent according to [l] or [2], where the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5.

TH0098 The antitumor agent ing to [l] or [2], wherein the DNA function inhibitor is a drug containing (R)-N—(1—(3— (cyclopentyloxy)phenyl)ethyl)—3—((2,4—dioxo—3,4—dihydropyrimidin— 1(2H)-yl)methoxy)propane~l~sulfonamide or a pharmaceutically acceptable salt thereof, and a fluorinated pyrimidine antimetabolite.

The antitumor agent according to [4], wherein the nated dine antimetabolite is a combination drug containing tegafur, gimeracil, and oteracil potassium in a molar ratio of l : 0.4 : l, or capecitabine.

The antitumor agent according to any one of [l] to [5], where the immunomodulator is a PD—l pathway antagonist, an ICOS pathway antagonist, a CTLA—4 pathway nist, a CD28 pathway antagonist, or a combination thereof.

The antitumor agent according to [6], where the PD—l pathway antagonist is an anti-PD-l antibody, an anti—PD—Ll antibody, an D—L2 antibody, or a combination thereof.

The antitumor agent according to [7], wherein the anti—PD—l antibody is nivolumab or pembrolizumab, and the anti-PD—Ll antibody is atezolizumab, durvalumab, or avelumab.

The mor agent according to [6], where the CTLA-4 pathway antagonist is an TLA—4 antibody.

The antitumor agent according to [9], where the TLA—4 antibody is ipilimumab or tremelimumab.

The antitumor agent according to any one of [l] to [3] and [6] to [10], where the dose per day of trifluridine on the administration date is 50 to 115% of the recommended dose when administered alone.

TH0098 The antitumor agent according to any one of [l] to [3] and [6] to [10], where the dose per day of trifluridine on the administration date is 35 to 80 mg/mz/day.

The antitumor agent according to any one of [1] to [12], where the cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

The antitumor agent according to any one of [1] to [13], where the cancer to be targeted is large bowel cancer.

An antitumor effect potentiator containing a DNA on inhibitor for potentiating an antitumor effect of an immunomodulator.

An mor effect iator containing an immunomodulator for potentiating an mor effect of a DNA on inhibitor.

An antitumor agent containing a DNA function inhibitor for treating a cancer patient administered with an immunomodulator.

An antitumor agent ning an immunomodulator for treating a cancer patient administered with a DNA function inhibitor.

An antitumor agent containing a DNA function inhibitor, which is used in combination with an immunomodulator.

An antitumor agent containing an immunomodulator, which is used in combination with a DNA function inhibitor.

A kit preparation containing an antitumor agent containing a DNA function inhibitor and an instruction for use, the instruction for use describing that a DNA function inhibitor and an immunomodulator are administered to a cancer patient in combination.

Use of a DNA function tor and an immunomodulator for producing an antitumor agent.

The use according to [22], wherein the DNA function inhibitor is a drug containing trifluridine, or a drug containing a THOO98 ridine triphosphatase inhibitor and a fluorinated pyrimidine antimetabolite.

The use according to [22] or [23], wherein the DNA function tor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5.

The use according to [22] or [23], wherein the DNA function inhibitor is a drug containing (R)-N-(1—(3— (cyclopentyloxy)phenyl)ethyl)((2,4-dioxo-3,4—dihydropyrimidin— 1(2H)-yl)methoxy)propane—l—sulfonamide or a pharmaceutically acceptable salt thereof, and a fluorinated pyrimidine antimetabolite.

The use according to [25], wherein the fluorinated pyrimidine antimetabolite is a combination drug containing tegafur, gimeracil, and oteracil potassium in a molar ratio of 1 : 0.4 : 1, or capecitabine.

The use according to any of [22] to [26], wherein the immunomodulator is a PD-l pathway antagonist, an ICOS pathway agonist, a CTLA—4 pathway antagonist, a CD28 pathway agonist, or a combination thereof.

The use ing to [27], wherein the PD—l pathway nist is an anti—PD—l antibody, an anti-PD-Ll antibody, an anti—PD—LZ antibody, or a ation thereof.

The use according to [28], n the anti—PD—l antibody is nivolumab or pembrolizumab, and the anti—PD—Ll antibody is atezolizumab, durvalumab, or avelumab.

The use ing to [27], wherein the CTLA-4 pathway antagonist is an TLA—4 antibody.

The use according to [30], wherein the anti-CTLA-4 antibody is ipilimumab or tremelimumab.

TH0098 The use according to any of [22] to [24] and [27] to [31], wherein the dose per day of trifluridine on the administration date is 50 to 115% of the recommended dose when administered alone.

The use according to any of [22] to [24] and [27] to [31], wherein the dose per day of trifluridine on the administration date is 35 to 80 mg/nfi/day.

The use ing to any of [22] to [33], wherein the cancer to be targeted is gastrointestinal cancer, lung cancer, or breast The use according to any of [22] to [34], wherein the cancer to be targeted is large bowel cancer.

Use of a DNA on inhibitor for producing an antitumor effect potentiator for potentiating an antitumor effect of an immunomodulator.

Use of an immunomodulator for producing an antitumor effect potentiator for potentiating an antitumor effect of a DNA function tor.

Use of a DNA function inhibitor for producing an antitumor agent for treating a cancer patient administered with an immunomodulator.

Use of an immunomodulator for ing an antitumor agent for treating a cancer patient administered with a DNA function inhibitor.

Use of a DNA function inhibitor for producing an mor agent used in combination with an immunomodulator.

Use of an modulator for producing an antitumor agent used in combination with a DNA function inhibitor.

A combination of a DNA function inhibitor and an immunomodulator for use in treatment of a tumor.

TH0098 The combination ing to [42], wherein the DNA function inhibitor is a drug containing trifluridine, or a drug containing a deoxyuridine triphosphatase tor and a fluorinated pyrimidine antimetabolite.

The combination ing to [42] or [43], wherein the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5.

The combination ing to [42] or [43], wherein the DNA function inhibitor is a drug containing (R)—N—(l—(3— (cyclopentyloxy)phenyl)ethyl)((2,4-dioxo—3,4—dihydropyrimidin— 1(2H)-yl)methoxy)propane—l—sulfonamide or a pharmaceutically acceptable salt thereof, and a fluorinated pyrimidine antimetabolite.

The combination according to [45], wherein the nated pyrimidine antimetabolite is a combination drug containing tegafur, gimeracil and oteracil potassium in a molar ratio of l : 0.4 : l, or capecitabine.

The combination according to any of [42] to [46], wherein the immunomodulator is a PD—l pathway nist, an ICOS pathway agonist, a CTLA—4 pathway antagonist, a CD28 pathway agonist, or a combination thereof.

The combination according to [47], wherein the PD—l pathway antagonist is an anti—PD—l antibody, an D—Ll antibody, an anti—PD—LZ antibody, or a combination thereof.

The combination according to [48], wherein the anti—PD—l antibody is nivolumab or lizumab, and the anti—PD—Ll antibody is atezolizumab, umab, or avelumab.

The combination according to [47], wherein the CTLA—4 pathway antagonist is an anti—CTLA-4 antibody.

TH0098 The combination according to [50], wherein the anti-CTLA—4 antibody is ipilimumab or tremelimumab.

The combination according to any of [42] to [44] and [47] to , n the dose per day of trifluridine on the stration date is 50 to 115% of the recommended dose when administered alone.

The combination according to any of [42] to [44] and [47] to , wherein the dose per day of ridine on the administration date is 35 to 80 mg/mZ/day.

The combination according to any of [42] to [53], wherein the cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

The combination according to any of [42] to [54], wherein the cancer to be targeted is large bowel cancer.

A DNA function inhibitor for use in potentiation of an mor effect of an immunomodulator.

An immunomodulator for use in potentiation of an antitumor effect of a DNA function inhibitor.

A DNA function inhibitor for use in treatment of a cancer t administered with an immunomodulator.

An immunomodulator for use in ent of a cancer patient administered with a DNA function inhibitor.

A DNA function inhibitor for use in treatment of a tumor used in combination with an immunomodulator.

An immunomodulator for use in treatment of a tumor used in combination with a DNA function inhibitor.

A method for treating a tumor, the method sing administering effective doses of a DNA function inhibitor and an immunomodulator to a subject in need thereof.

THOO98 The method according to [62], wherein the DNA function tor is a drug containing trifluridine, or a drug containing a deoxyuridine triphosphatase tor and a fluorinated pyrimidine antimetabolite.

The method according to [62] or [63], wherein the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of l : 0.5.

The method according to [62] or [63], wherein the DNA function inhibitor is a drug containing (R)-N-(1-(3- (cyclopentyloxy)phenyl)ethyl)—3—((2,4—dioxo—3,4—dihydropyrimidin~ 1(2H)-yl)methoxy)propane—l—sulfonamide or a pharmaceutically acceptable salt thereof, and a fluorinated pyrimidine antimetabolite.

The method according to [65], wherein the fluorinated pyrimidine antimetabolite is a ation drug containing tegafur, gimeracil, and il potassium in a molar ratio of 1 : 0.4 : l, or capecitabine.

The method according to any of [62] to [66], wherein the immunomodulator is a PD-l pathway antagonist, an ICOS pathway t, a CTLA—4 pathway antagonist, a CD28 pathway t, or a combination thereof.

The method according to [67], wherein the PD—l pathway antagonist is an anti—PD—l antibody, an anti—PD—Ll antibody, an anti-PD-L2 antibody, or a combination thereof.

The method according to [68], wherein the anti—PD—l antibody is nivolumab or pembrolizumab, and the anti-PD-Ll antibody is izumab, umab, or avelumab.

The method according to [67], wherein the CTLA—4 pathway antagonist is an TLA—4 antibody.

THOO98 The method according to [70], wherein the anti-CTLA—4 antibody is ipilimumab or tremelimumab.

The method according to any of [62] to [64] and [67] to [71], wherein the dose per day of trifluridine on the administration date is 50 to 115% of the ended dose when administered alone.

The method according to any of [62] to [64] and [67] to [71], wherein the dose per day of trifluridine on the administration date is 35 to 80 mg/mz/day.

The method according to any of [62] to [73], wherein the cancer to be ed is gastrointestinal , lung , or breast cancer.

The method according to any of [62] to [74], wherein the cancer to be ed is large bowel cancer.

A method for potentiating an antitumor effect of an immunomodulator, the method comprising administering an ive dose of a DNA on inhibitor to a subject in need thereof.

A method for potentiating an antitumor effect of a DNA function inhibitor, the method comprising administering an effective dose of an immunomodulator to a subject in need thereof.

A method for treating a cancer patient administered with an immunomodulator, the method comprising administering an effective dose of a DNA function inhibitor to a subject in need thereof.

A method for treating a cancer patient administered with a DNA function tor, the method comprising administering an effective dose of an immunomodulator to a subject in need thereof.

A method for treating a tumor in combination with using an immunomodulator, the method comprising administering an effective dose of a DNA function inhibitor to a subject in need thereof.

THOO98 A method for ng a tumor in combination with using a DNA function inhibitor, the method comprising administering an effective dose of an immunomodulator to a subject in need thereof.

[Effects of the Invention] ing to the antitumor agent of the present invention, it is possible to m cancer treatment exhibiting high antitumor effect (particularly, effect for reducing_tumor size and tumor growth rate (life prolongation effect)) while ssing the onset of side effects. Eventually, it brings long term survival of cancer patients.

[Brief Description of Drawings] [Fig. 1] Fig. 1 illustrates an antitumor effect on mouse large bowel cancer (GMT-93) in an anti-mouse PD-l antibody single administration group.

[Fig. 2] Fig. 2 illustrates a weight change of mouse with large bowel cancer (GMT—93) in an anti—mouse PD—l antibody single administration group.

[Fig. 3]Fig. 3 illustrates an effect of combinatorial use of an FTD/TPI ation drug and an ouse PD-l antibody on mouse large bowel cancer (GMT-93).

[Fig. 4] Fig. 4 illustrates a weight change of mouse with large bowel cancer (GMT—93) in a co—administration group using an FTD/TPI combination drug and an anti-mouse PD-l antibody in combination.

[Fig. 5] Fig. 5 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti-mouse PD—l antibody on mouse large bowel cancer (GMT-93); in Control group.

TH0098 [Fig. 6] Fig. 6 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti-mouse PD—l antibody on mouse large bowel cancer (GMT—93); in anti—mouse PD—l dy 0.1 mg/body/day group.

[Fig. 7} Fig. 7 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti-mouse PD—l antibody on mouse large bowel cancer 3); in FTD/TPI 75 mg/kg/day group.

[Fig. 8] Fig. 8 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti—mouse PD—l antibody on mouse large bowel cancer (GMT-93)} in FTD/TPI 100 mg/kg/day group.

[Fig. 9] Fig. 9 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti-mouse PD—l antibody on mouse large bowel cancer (CMT~93); in I 150 day group.

[Fig. 10] Fig. 10 illustrates an effect of atorial use of an FTD/TPI combination drug and an anti—mouse PD-l antibody on mouse large bowel cancer (GMT-93); in anti—mouse PD~1 antibody 0.1 y/day + FTD/TPI 75 mg/kg/day group.

[Fig. 11] Fig. 11 rates an effect of combinatorial use of an FTD/TPI combination drug and an anti—mouse PD—l antibody on mouse large bowel cancer (GMT—93); in anti~mouse PD~1 antibody 0.1 mg/body/day + FTD/TPI 100 mg/kg/day group.

[Fig. 12] Fig. 12 illustrates an effect of combinatorial use of an I combination drug and an anti—mouse PD—l antibody on mouse large bowel cancer (GMT-93); in anti—mouse PD-l antibody 0.1 mg/body/day + FTD/TPI lSO mg/kg/day group.

[Fig. 13] Fig. 13 illustrates a weight change of mouse with large. bowel cancer (GMT-93) in a co-administration group using an FTD/TPI combination drug and an anti-mouse PD—l antibody in combination.

TH0098 [Fig. 14] Fig. 14 illustrates an effect of combinatorial use of an FTD/TPI combination drug and an anti—mouse'PD—Ll antibody on mouse large bowel cancer (GMT-93).

[Fig. 15] Fig. 15 illustrates a weight change of mouse with large bowel cancer (GMT—93) in a inistration group using an FTD/TPI combination drug and an anti—mouse PD—Ll antibody in combination.

[Fig. 16] Fig. 16 illustrates an effect of atorial use of S- '1+Compound 1 and an anti-mouse PD-l antibody on mouse large bowel cancer (GMT—93).

[Fig. 17] Fig. 17 illustrates a weight change of mouse with large bowel cancer (GMT—93) in a co—administration group using S~ 1+Compound 1 and an anti—mouse PD-l antibody in combination.

[Detailed ption of the Invention] The present invention relates to an antitumor agent, an antitumor effect potentiator, a kit preparation, for administering a DNA function inhibitor (particularly, an FTD/TPI ation drug) and an immunomodulator (particularly, an anti—PD-l antibody) in combination, and use of these agents, a method for ng a tumor, and a method for iating an antitumor effect.

The DNA function inhibitor in the present invention refers to a drug which increases incorporation of wrong nucleobases into DNA within a tumor cell to cause inhibition of DNA function and thus exhibits an antitumor effect.

Examples of the specific DNA function inhibitor e a drug containing FTD, and a drug containing dUTPase inhibitor and a fluorinated pyrimidine antimetabolite.

TH0098 es of the drug containing FTD in the present invention include a combination drug containing FTD and TPI, and it is preferable to contain FTD and TPI in a molar ratio of l : 0.5. FTD and TPI are each a known compound, and can be synthesized, for example, according to a method described in W0 l996/30346. A combination drug containing FTD and TPI in a molar ratio of l : 0.5 is also publicly known (Non Patent Literatures l and 2). In addition, the FTD/TPI combination drug was approved as a therapeutic agent for atic colorectal cancer in Japan and the United States, and, as the usage and dosage, 70 mg/mg/day as FTD is orally administered twice a day for 5 utive days, followed by rest for 2 days. This is repeated twice, and followed by rest for 14 days. It is defined that the administration is repeated with the above procedure as one course.

The "dUTPase inhibitor" in the "drug containing a dUTPase inhibitor and a fluorinated pyrimidine antimetabolite" of the present invention is not particularly limited as long as a nd has an inhibitory activity of dUTPase. es preferably e (R)—N—(1—(3—(cyclopentyloxy)phenyl)ethyl)—3—((2,4—dioxo—3,4— dihydropyrimidin-1(2H)—yl)methoxy)propane-l—sulfonamide represented by the following formula (1) (hereinafter, also referred to as "Compound 1") or a pharmaceutically acceptable salt thereof.

Compound 1 includes optical s and hydrates.

A o (1) O N H H L/O\v/“\v/§_N O/I::> TH0098 nd 1 is a known compound which has a good dUTPase inhibitory activity and can be synthesized by following the method described in, for example, International Publication No.

W02009/l47843. Compound 1 is also known to potentiate an antitumor effect of fluorinated pyrimidine antimetabolites such as 5—FU (International Publication No. /065541).[0018] The ”fluorinated pyrimidine antimetabolite" in the "drug ning a-dUTPase inhibitor and a fluorinated pyrimidine antimetabolite“ of the present invention is not particularly limited as long as it has a fluorinated pyrimidine structure and exhibits an antitumor effect as S-FU in cells, and includes 5—FU, derivatives thereof and prodrugs thereof. Specifically, examples include 5-FU, tegafur, a combination drug containing tegafur, cil, and il potassium in a molar ratio of l : 0.4 : l (hereinafter, also referred to as "tegafur/gimeracil/oteracil potassium combination drug", "S—l"), a combination drug containing tegafur and uracil in a molar ratio of 1 : 4 (hereinafter, also referred to as "tegafur/uracil combination drug", "UFT"), tabine, doxifluridine, 5-fluoro—2'—deoxyuridine (FdUrd), and carmofur, and 5-FU, a tegafur/gimeracil/oteracil ium combination drug, a tegafur/uracil combination drug, and capecitabine are preferable, a r/gimeracil/oteracil potassium combination drug and capecitabine are more preferable, and a tegafur/gimeracil/oteracil potassium combination drug is particularly preferable.

TH0098 The immunomodulator in the present invention has an activity of inducing an antitumor immune response in the living body of a cancer patient and controlling immune escape of tumor.

An example of such substance includes a substance promoting a function of costimulatory molecule (stimulant costimulatory le), or a substance promoting a function of coinhibitory le (inhibitory costimulatory molecule). Currently, a large number of B7 family and CD28 family are identified, and substances targeting these can be used without being particularly limited, in the t invention. Examples include a PD-l pathway antagonist, an ICOS pathway antagonist, a CTLA-4 pathway antagonist, a CD28 pathway antagonist, and a BTLA pathway antagonist.

In the present invention, the immunomodulator is preferably a PD-l pathway antagonist, an ICOS pathway antagonist, a CTLA-4 y nist, a CD28 pathway antagonist, or a combination f, more preferably a PD-l pathway antagonist or a CTLA—4 pathway antagonist, and from the viewpoint of suppressing side effects, further more ably a PD—l pathway antagonist.

The PD—l pathway antagonist ts PD—l expressed on T cells, or immunoinhibitory signal by PD—Ll or PD—L2 that is a ligand thereof, and is preferably an anti-PD-l antibody, an anti—PD—Ll antibody, an anti-PD—L2 antibody, a PD-l extracellular domain, a PD-Ll extracellular domain, a PD—L2 ellular domain, PD-l-Ig (fusion protein of PD—l ellular domain and FC region of Ig), Ig, and PD-L2—Ig, more preferably an anti—PD—l antibody, an anti—PD—Ll antibody, and an anti—PD—LZ antibody, and more preferably an anti—PD—l antibody and an anti-PD-Ll antibody. Among them, preferred is an anti-PD-l antibody.

TH0098 The CTLA—4 pathway antagonist inhibits CTLA—4 sed on T cells, or immunoinhibitory signal by B7—l (CD80) or B7—2 (CD86) that is a ligand thereof, and is ably an TLA—4 antibody, a CTLA—4 extracellular domain, CTLA—4—Ig, an anti—B7—l/CD80 antibody, and an 7-2/CD86 dy, and more preferably, an anti—CTLA—4 antibody and CTLA—4—Ig. .Among them, red is an anti—CTLA—4 antibody.

These antibodies may be any antibody of a human-derived antibody, a mouse—derived antibody, a rat-derived antibody, a rabbit—derived antibody, a goat—derived antibody, a llama—derived antibody, and a chicken—derived antibody, and may be any of a polyclonal antibody, a monoclonal antibody, and a complete or truncated (for example, F(ab')2, Fab', Fab or Fv fragment) antibody, a chimerized antibody, a humanized antibody or a completely human antibody thereof.

Preferably, the antibody is a humanized antibody or a completely human antibody, and is a monoclonal antibody. ic examples of the anti—PD—l antibody in the present invention include nivolumab or pembrolizumab, and nivolumab is preferable.

Examples of the anti-PD-Ll dy in the present invention specifically include izumab, durvalumab, and avelumab, and atezolizumab is preferable.

Specific examples of the anti—CTLA—4 antibody in the present invention include ipilimumab or tremelimumab, and ipilimumab is preferable.

Specific examples of the CTLA—4—Ig in the present invention e abatacept.

TH0098 These antibodies can be produced by a conventionally known antibody preparation method, for example, can be produced by the method of Patent Literature 2.

In addition, the anti—PD—l antibody as nivolumab or lizumab, the anti PD—Ll dy as atezolizumab, durvalumab or avelumab, the anti-CTLA-4 antibody as ipilimumab or tremelimumab, and the CTLA—4—Ig as abatacept are already sold or to be sold, and these can be also used.

The dose per day on the administration date of the DNA on inhibitor in the present invention, in the case of the FTD/TPI combination drug (FTD and TPI in a molar ratio of 1 : 0.5), is preferably 50 to 115% of the recommended dose when the FTD/TPI combination drug is administered alone, more preferably 50 to 100%, more preferably 67 to 100%, and particularly preferably 100%, from the viewpoint of an activity of potentiating an antitumor effect of the immunomodulator by the FTD/TPI combination drug. Specifically, the recommended dose when the FTD/TPI combination drug is administered alone in human is 70 mg/mz/day as FTD that is the dose approved in Japan as bed above, thus the dose per day on the administration date of the FTD/TPI combination drug in the present invention is preferably 35 to 80 mg/HF/day, more preferably 35 to 70 mg/mg/day, more preferably 50 to 70 mg/nP/day, and particularly preferably 70 mg/mz/day as FTD.

In addition, when the DNA function inhibitor is a drug containing Compound 1 or a pharmaceutically acceptable salt thereof and the tegafur/gimeracil/oteraci1 ium combination drug, the dose per day of Compound 1 on the administration date is preferably 12 to 1,200mg/m2/day, more preferably 120 to 600 mg/mg/day, and TH0098 particularly preferably 240 to 480 mg/nF/day. Further, when the dose per day of Compound 1 on the administration date is defined on a patient—specific basis, 20 to 2,000 mg/body/day is preferable, 200 to 1,000 mg/body/day is more preferable, and 400 to 800 mg/body/day is particularly preferable.

Further, the dose per day of the tegafur/gimeracil/oteracil potassium combination drug on the administration date is, as tegafur amount, preferably 10 to 200 mg/uF/day, more preferably 20 to 80 mg/mz/day, and particularly preferably 40 to 72 mg/mz/day.

Furthermore, when the DNA on inhibitor is a drug containing Compound 1 or a pharmaceutically acceptable salt thereof and capecitabine, the dose per day of Compound 1 on the administration date is preferably 12 to 3,000 mg/mz/day, more preferably 240 to 1,200 mg/mz/day, and particularly ably 480 to 720 mg/ug/day. Additionally, when the dose per day or Compound 1 on the administration date is defined on a patient—specific basis, to 5,000 mg/body/day is able, 400 to 2,000 mg/body/day is more preferable, and 800 to 1,200 mg/body/day is particularly preferable.

Further, the dose per day of tabine on the stration date is preferably 200 to 3,000 day, more preferably 480 to 1,400 day, and particularly preferably 600 to 900 mg/mz/day.

The dose to a patient can be determined based on the body surface area (BSA) calculated from the patients height and body weight. As a method for calculating a body surface area, a conventional method is appropriately used, depending on, for example, the race, sex, health condition and symptom of the patient, TH0098 for example, the following calculation formulae 1 to 6, and preferably the following formula 1 or 2(a). 1. The Mosteller formula (See N Engl J Med 1987 Oct 22; 317(17): 1098 (letter)) BSA (m2) = ([Height (cm) x Weight (kg)]/3600)1/2 2. The DuBois and DuBois formula (See Arch Int Med 1916 17: 863—71; J Clin . 1992; 4(1): 4—10) (a) BSA (m2) = 0.20247 x Height (111)“725 x Weight (kg)“4” (b) BSA (m2) = 0.007184 x Height (cm)°-725 x Weight (kg)°~425 3. The Haycock formula (See The Journal of Pediatrics 1978 93: 1: 62-66) BSA (m?) = 0.024265 x Height (cm)°39“ x Weight (kg)°53” 4. The Gehan and George formula (See Cancer Chemother Rep 1970 54: 225-35) BSA (m2) = 0.0235 x Height (cm)°A2M6 x Weight (kg)°'51456 . The Boyd formula (See Minneapolis: university of Minnesota Press, 1935) BSA (m2) = 0.0003207 x Hei htg (cm)°-3 x Wei htg ( gram)“’-7285"°-0188 LOG (gram) 6. The to a (See Nihon aku Zasshi, 1968 23(5): 443—450) BSA (m2) 0.008883 x Height 663 x Weight (kg)m4“ For example, when the body surface area of a cancer patient of 175 cm in height and 70 kg in weight is calculated using the above calculation formula 1, the body surface area is calculated as [175 (cm) x 70 3600)1/2 = 1.84 (n3). When the dose is 60 mg/ufi/day in the patient, the total daily dose is calculated as 1.84 x 60 111 mg, and set to about 110 mg.

The dose per day of the immunomodulator on the administration date in the present invention is preferably 50 to 100% and more TH0098 preferably 100% of the recommended dose when the DNA function inhibitor is administered alone, from the viewpoint of an activity of potentiating an mor effect of the modulator by the DNA function inhibitor.

Specifically, the recommended dose when nivolumab is administered alone is 2 mg/kg (weight) per once that is the dose approved in Japan, thus the dose per day of nivolumab on the administration date in the present ion is preferably 1 to 2 mg/kg (weight) per once and more preferably 2 mg/kg (weight) per once.

The recommended dose when atezolizumab is administered alone is 1,200 mg per once, which is the doSe approved in the US, and thus the dose per day of atezolizumab on the administration date in the present invention is preferably 600 to 1,200 mg per once, and more ably 1,200 mg per once.

The term "recommended dose" in the present invention refers to a dose having a maximum therapeutic effect in the range that can be safely used free from serious side effects, for example, determined by clinical trials, and specific example includes doses that are ed, ended and advised by public institutions and ations such as PMDA; Pharmaceuticals and Medical Devices Agency, FDA; Food and Drug Administration), and EMA; European Medicines Agency, and described in the attached document, interview form and treatment guidelines, and the dose approved by any of public institutions of PMDA, FDA or EMA is preferable.

The administration schedule of the antitumor agent of the present invention can be properly selected depending on, for example, carcinoma and stage.

TH0098 In the case of the FTD/TPI combination drug, an administration schedule of 5—day daily administration and 2—day rest are repeated twice, followed by rest for 2 weeks, or an administration schedule of 5—day daily administration and 9—day rest are repeated twice is able.

In the case of Compound 1 or a pharmaceutically acceptable salt thereof, the tegafur/gimeracil/oteracil potassium combination drug, and capecitabine, an administration schedule of l- to 4-week administration and 1— to 2-week rest are repeated is able, an administration schedule of 2- to 3—week administration and 1—week rest are repeated is more preferable, and an administration schedule of 2—week administration and 1—week rest are repeated is particularly preferable.

In the case of nivolumab or atezolizumab, an administration schedule that administers at 3-week als is preferable.

The number of administrations of the antitumor agent of the present invention per day can be properly selected depending on, for example, carcinoma and stage.

The number of administrations is preferably twice a day in the case of I combination drug, twice a day in the case of Compound 1 or a pharmaceutically acceptable salt thereof, tegafur/gimeracil/oteracil potassium combination drug and capecitabine, and once a day in the case of mab or atezolizumab.

The order of stration of the DNA function inhibitor and the immunomodulator of the present invention can be properly selected ing on, for example, carcinoma and stage, and either one may be administered first, and both may be stered simultaneously.

TH0098 Specific examples of the cancer to be targeted by the antitumor agent of the present invention e head and neck cancer, gastrointestinal cancer (e.g., esophageal cancer, gastric cancer, duodenal cancer, liver cancer, biliary tract cancer (e.g., gallbladder/bile duct cancer), pancreatic cancer, small bowel cancer, and large bowel cancer (e.g., colorectal , colon cancer, and rectal cancer)), lung cancer (e.g., nonasmall cell lung cancer, small cell lung cancer), breast cancer, n cancer, uterine cancer (e.g., cervical cancer and endometrial cancer), renal cancer, bladder cancer, prostate cancer, and skin .

Here, the cancer includes not only a primary tumor but also a tumor derived from a solid cancer that has metastasized to other organs (such as liver). Among them, from the viewpoint of antitumor effects and side effects, the target of the antitumor agent of the present invention is preferably head and neck cancer, gastrointestinal cancer, lung cancer, breast , renal cancer and skin cancer, more ably intestinal cancer, lung cancer, or breast cancer, more preferably large bowel cancer, gastric cancer, or lung cancer, and particularly preferably large bowel cancer. The antitumor agent of the present ion may be one used for postoperative adjuvant chemotherapy that is performed for preventing the recurrence after having extracted the tumor surgically, and also may be one used for preoperative nt chemotherapy that is performed in advance for ting the tumor surgically.

Since the administration method and the administration schedule are different in each active ingredient, and when all active ingredients of the DNA function inhibitor and the TH0098 immunomodulator cannot be formulated into one dosage form, it is preferred that the antitumor agent of the present invention is separately formulated into a plurality of dosage forms for each active ingredient. Specifically, it is preferred that the FTD/TPI combination drug and the tegafur/gimeracil/oteracil ium combination drug be formulated as combination drugs, and Compound 1 or a pharmaceutically acceptable salt thereof, capecitabine, the anti—PD—l antibody, the anti-PD-Ll antibody or the anti—CTLA—4 dy be formulated as a single agent.

In addition, as long as each active ingredient is stered according to the dose of the t invention, each preparation may be manufactured and sold together in a single package suitable for administration in combination, or each ation may be manufactured and sold after being divided into te package.

There is no particular limitation to the dosage form of the antitumor agent of the present invention, and it can be appropriately selected depending on the therapeutic es and include specifically, for example, oral preparations (e.g., tablets, coated tablets, powders, granules, capsules, and solutions), injections, suppositories, patches, and ointments. An oral preparation is preferable in the case of the FTD/TPI combination drug, Compound 1 or a pharmaceutically acceptable salt thereof, tegafur/gimeracil/oteracil potassium combination drug, and tabine. In the case of the anti—PD—l antibody, anti-PD-Ll antibody, or the anti—CTLA—4 antibody, examples include the above dosage form, and an injection is preferable.

TH0098 Depending on the dosage form, the antitumor agent of the present ion can be usually prepared by the known method using a ceutically acceptable carrier, also for the DNA function inhibitor and the immunomodulator. Such a carrier includes various ones which are commonly used in tional drugs, such as ents, binders, disintegrators, lubricants, diluents, solubilizers, suspending agents, isotonic agents, pH adjusting , buffering agents, stabilizers, coloring agents, flavoring agents, and odor improving agents.

The present invention also relates to an mor effect iator containing a DNA function inhibitor for potentiating an mor effect of an immunomodulator on a cancer patient. The antitumor effect potentiator has a preparation form of the above mor agent.

The present invention also relates to an antitumor effect potentiator containing an immunomodulator for potentiating an antitumor effect of a DNA function inhibitor on a cancer patient.

The antitumor effect potentiator has a preparation form of the above antitumor agent.

The present invention also relates to an antitumor agent containing a DNA function inhibitor for treating a cancer patient administered with an immunomodulator. The antitumor agent has the above preparation form.

The present invention also relates to an antitumor agent containing an immunomodulator for treating a cancer patient administered with a DNA function inhibitor. The antitumor agent has the above preparation form.

TH0098 The "treatment" includes postoperative adjuvant chemotherapy that is performed for ting the recurrence after having extracted the tumor surgically and preoperative adjuvant chemotherapy that is performed in advance for extracting the tumor surgically.

The present invention also relates to an antitumor agent containing a DNA function inhibitor, which is used in combination with an immunomodulator on a cancer patient. The mor agent has the above preparation form.

The present invention also relates to an antitumor agent containing an immunomodulator, which is used in combination with a DNA function inhibitor on a cancer t. The antitumor agent has the above preparation form.

The present invention also relates to a kit preparation containing an antitumor agent containing a DNA function inhibitor, and an instruction for use describing that the DNA function inhibitor and an immunomodulator are to be administered to a cancer patient in ation. The term "instruction for use" may be any one as long as it describes the above dose; however, an instruction for use, in which the above doSe is recommended though legal binding force does not , is preferable. The instruction for use includes ically, for example, a package insert, and a pamphlet. Also, a kit preparation containing an instruction for use may be one in which an instruction for use is printed on or attached to the package of the kit preparation, or may be one in whibh an ction for use is enclosed in a package of the kit preparation together with an antitumor agent.

[Examples] TH0098 Hereinafter, the present invention will be ned in further detail by way of examples and reference examples. However, this invention should not be limited to these es in any manner, and many variations can be employed by a person with ordinary skill in the art within the technical concept of the present invention. nce Example 1 Cultured cells (1 x 107 cells/mouse) derived from human large bowel cancer cell line (KMZOC) were intraperitoneally transplanted into 5 to 6 week old BALB/cA Jcl—nu mice. The mice were divided into groups so that the mean body weight of each group might be equal, and the date of grouping (n = 10) was designated as Day 0.

FTD/TPI combination drug (a mixture of FTD and TPI in a molar ratio of 1 : 0.5, hereinafter the same) was prepared for administration in an amount of 75, 100, 150, 300, and 450 mg/kg/day as FTD. The drug administration started on Day 3, and a 5—day daily oral stration of the FTD/TPI combination drug with 2—day rest was performed for 6 weeks.

As an index of the antitumor effect, the number of mice surviving in each groups and the survival time and increased life span of each group were compared" The increased life span (ILS) was calculated as follows.

ILS (%) n life span of the stration group)/(mean life span of the untreated group)} — 1] x 100 The results are shown in Table l.

TH0098 [Table 1] Dose (in terms of Mean life span (day) 89.5 ——-s-35.3 As described in Table 1, for the FTD/TPI ation drug, an effect of extending life span in all groups of 75 to 450 mg/kg/day as the FTD amount is observed, and among them, life span is longest in the group of 150 mg/kg/day, thus the recommended dose (RD) of the FTD/TPI combination drug in mice is 150 mg/kg/day as FTD. Thus, it was shown that the FTD/TPI ation drug exhibits an extending effect of life span at least in a dose of 50 to 300% of While, it is known that RD when the FTD/TPI combination drug is administered alone in human is 70 mg/mz/day as FTD. Thus, the dose of the FTD/TPI combination drug as FTD corresponds to 150 mg/kg/day in mice and 70 day in humans.

Reference Example 2 Mouse large bowel cancer cell line (GMT—93) was transplanted into the right side of the chest of 5 to 6 weeks old C57BL/6 mice after birth” After tumor transplantation, the major axis (mm) and minor axis (mm) of tumor were measured, and the tumor volume (TV) was calculated. Then, the mice were divided into groups so that the mean TV of each group might be equal and the day when the grouping (n = 6) was performed was designated as Day 0.

An anti—mouse PD—l antibody (clone 4, manufactured by BioXCell, hereinafter the same) was prepared for administration in TH0098 an amount of 0.1 mg/body/day, that is a dose in which the antitumor effect is reported in mouse (Clin Cancer Res. 2013 Oct 15; 19(20): 5626—35.). The anti-mouse PD—l dy was intraperitoneally administered on Day 1, Day 5, and Day 9.

As an index of the antitumor effect, TV on Day 0, 4, 8, 11, 15, 18, 22, 25 and 28 in each group was ated, and the relative tumor volume (RTV) on Day 0 was determined by the following formula and compared to the RTV of the untreated ol) group.

TV (mm?) = (major axis x minor axisZ)/2 RTV = (TV on Day 28)/(TV on Day 0) The RTV is plotted for each measurement date, and the result of comparing the time (day)-course change of RTV of the untreated group and the anti-mouse PD—l antibody single administration group is shown in Fig. 1.

Tumor growth inhibition (TGI) rate based on the RTV value on Day 28 was calculated according to the following formula.

TGI (%) = [1 — (mean RTV of the treated group)/(mean RTV of the untreated group)] x 100 [00481 For evaluating the effect with a single agent, it was determined that there was an enhancing effect when the mean RTV value of the single stration group was statistically significantly (Closed testing procedure; Intersection-Union Test p < 0.01) r than the mean RTV value of the untreated (control) group.

The results were shown in Table 2.

TH0098 [Table 2] BEHEB 05;. 39V - v.8 9.36:8 03 3. N 2: Sm S 32m moA 2.0 332m fl H.352 u.“ a 63:8 :mmEv 3.5 84 EuEExEuEExfacm; 9:288 0 3.26:8 05 ED he 3&3 :0 >E mmfl 8 9: Swing: u 8 B. ma 3288 595 H « was; mmémm 3.? ”235.8 .30 :0 >335 @5322 >150 "0338.3 .3 uwummh ucmEummLF .od .955 mm: .m 038 .3330 \m 2.: PE unto 425 35:3 93 2 mm mums PE 53, 35.6va 85.32 9: 595 co .

PE 8 l $23335 369 388 33.323 mm? 8:20 mm >3 REEL mm; 25 >8 co no 35:8 .2 “no“ :o co mm cot 95.03-:32 9.5: BE mcto 032% €835» >3 >5 co 9:20:23 SN >E 9: 9.: >8 coEnEE 595 :93 :5 u H-o%m=oE-_uc< wE:_o>LoEE. :0 Q mm; >5 Esau H 8.on @253... u ex; 26.5 9:0 _ob:oU >5 BEE. Gk Emucmfi :2. ” an 3 Au now 63:8 TH0098 While, as an index indicating systematic toxicity due to drug administration, the body weight change (BWC) was used” BWC was ated according to the following formula, and the mean BWC values were shown in Fig. 2 and Table 3.

BWC (%) = ([(Body weight of mouse on Day 28) — (Body weight of mouse on Day 0)]/(Body weight of mouse on Day 0) x 100 TH0098 [Table 3] [llllllllulllllllll mud mod 902$ Smflame "m H 8.3 3.: “mince 96 9.38:3 58o o o .2 w...“ ho 225$ m o .oz @5988 EwEummfi llllllllllullllllllllll as. .2 .395 x .m 8 .Ezdfio .m 353.8 :8 295 .8 9: mm 2,8 :5 >8 \ mmoo co 5 . 32%838 33.58 Shot 3 SmflcmmE >85 mm 3m: ..8 “way 2x. - >3an -u 6N m_uEw> 039 >8 9: oE-_uc< Illlllllllllllllllnlll m_;u_m>>-:_Qm< 3ch an: :95 53> c2533 Emma u mm; 3.; 965 9:0 6.5200 dea .63 25m Emvcflm “in Am “am BhEou 'THOO98 As shown in Fig. 1, Fig. 2, Table 2 and Table 3, when the anti—mouse PD—l antibody was 0.1 mg/body/day, a statistically significant antitumor effect was shown. In the ouse PD—l antibody single administration group, serious weight reduction exceeding —20% was not observed, and the side effects were able degree.

Example 1: Combinatorial use of FTD/TPI combination drug and ouse PD-l antibody Mouse large bowel cancer cell line (GMT—93) was transplanted into the right side of the chest of 5 to 6 weeks old C57BL/6 mice after birth” After the tumor transplantation, the major axis (mm) and minor axis (mm) of tumor were measured, and the tumor volume (TV) was calculated. Then, the mice were divided into groups so that the mean TV of each group might be equal and the day of grouping (n = 6) was designated as Day 0.

An FTD/TPI combination drug was prepared for administration in an amount of 150 day as the dose of FTD. AAn anti—mouse PD—l antibody was prepared for administration in an amount of 0.1 y/day. The FTD/TPI combination drug was orally administered daily on Day 1 to 14, and the anti—mouse PD—l antibody was intraperitoneally administered on Day 1, Day 5, and Day 9.

As an index of the mor effect, TV on Day 0, 4, 7, 11, 15, 18, 22, 26 and 28 in each group was calculated, and the relative tumor volume (RTV) on Day 0 was determined by the above formula and compared to the RTV of the untreated (control) group- The above RTV was plotted for each measurement date. The result of comparing the time (day)—course change of RTV between the untreated group, the FTD/TPI combination drug administration group, the anti—mouse PD—l antibody single administration group, and the TH0098 co-administration group of the FTD/TPI combination drug and the ouse PD—l antibody is shown in Fig. 3.

Tumor growth inhibition (TGI) rate based on the RTV value on Day 28 was calculated.

It was determined that there is an enhancing effect when the mean RTV value of the co—administration group is statistically significantly (Closed testing ure; Intersection—Union Test p < 0.01) smaller than the mean RTV value of the individual single administration group.

The results were shown in Table 4.

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It was confirmed that, while the TGI in the combinatorial use expected when assuming that the effect of combinatorial use of both drugs was additive was 93.4%, actually, a more ent antitumor effect like 98.2% was confirmed” Thus, the effect of combinatorial use the FTD/TPI combination drug and the anti—mouse PD—l antibody was shown to be synergistic effect.

In the co-administration group of the FTD/TPI combination drug and the anti—mouse PD-l antibody, serious weight reduction exceeding -20% was not ed, and the side effects were acceptable degree.

Example 2: Combinatorial use of FTD/TPI combination drug and anti-mouse PD—l antibody 75, 100, 150 mg/kg/day (as FTD) of the FTD/TPI ation drug and 0.1 y/day of the anti-mouse PD—l antibody were administered to mice into which mouse large bowel cancer cell line (GMT—93) was transplanted in accordance with Example 1, and antitumor effects and weight reductions were measured. The results are shown in Figs. 5 to l3, Table 6 and Table 7.

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S 2 2 .02 :38 o o o o o o o o .0 fig m m m m m m m m 8.380.“ Eggnog .oaizvsn .910 .3 .od .3 .od .m «m wfiBozom "EB .3.szan .omizafi .oéEzES fi .m $733+ n2113+ .3??an €73~Q+ .195 2: map—coon $53? 5333 guises E??? muEéoeme 339:? §§oew55 $39.? giofies \QEflEE :95.» 02 umoQ x I 8 R 2: om 35:28 >8 a _ do + 3.580 + + 803 .8 ES, 36 39 \ 7? EH @8388 EHAHE . . #:2th mm AQmflHSE >8no an: 95+ 3% 8m :24 max. - @359“ +~€opu§ NA h am 20.5“; o u 0 o :5 2: h025V an .8 H H 53w - m.:o_o>?.:_gm< - 0??? 3 mm 5:33;. TE Tam 3m: u $3 5E Emma? 3 anew mam 3.280 388.32 Exam 8595 7?.an omzoEflq/x 3.308- 350:3 8.on buom 03m Emncfim vi .05 I; u an ”am 3:50 TH0098 As shown in Figs 5 to 13, Table 6 and Table 7, tically significantly remarkably potentiated mor effects were confirmed in all atorial use groups of the FTD/TPI ation drug and the anti—mouse PD—l antibody.

It was confirmed that, while the TGI in the combinatorial use expected when assuming that the effect of combinatorial use of both drugs was additive was 87.8%, 90.1%, and 92.6% respectively in the groups of 75, 100, 150 mg/kg/day as FTD, actually, more excellent antitumor effects like 91.8%, 95.7%, and 98.4% were confirmed. Thus, the effect of combinatorial use of the FTD/TPI combination drug and the anti—mouse PD—l antibody was shown to be istic effect.

In all co—administration groups, serious weight reduction exceeding —20% was not observed, and the side effects were acceptable degree.

Further, the significant iation in the antitumor effect by the PD—l antibody, even with a halved FTD , was a unexpected result.

Furthermore, in the atorial use group with 150 mg/kg/day of FTD, disappearance of tumors was confirmed in 4 mice out of 5 mice. This verifies that the antitumor effect is extremely high at the time of combinatorial use.

Example 3: Combinatorial use of FTD/TPI combination drug and anti-mouse PD-Ll antibody 150 mg/kg/day (as FTD) of the FTD/TPI combination drug and 0.1 and 0.2 mg/body/day of the anti-mouse PD—Ll antibody (clone 10F.9G2, manufactured by BioXCell, hereinafter the same) were administered to mice into which mouse large bowel cancer line (GMT—93) was transplanted in accordance with Example 1, and antitumor effects THOO98 and weight reductions were measured. The results are shown 111 Figs. l4 and 15, Table 8 and Table 9.

[Table 8] 358 ex; - new 2m wfim 9mm 98 : : : 2:: 8:: 33¢ 6m G; as was wwd «8 38 H H H H a H $95 $5 8+ van m?“ m3 9.5 H $62 32: 3% undo 3% 5% A? 58. H H H H H H 33:5.“ .MEEV 36mm $3. memmm 36mm 5% 8.: u£3o=£ 8_ m 2: x mo \ 2 .02 finen— 0 0 o 0 o o 635:0.“ 2.55 mo manuouum 3.28 .02 €ng o e o w s. e EEEYQEEXfiwEo wake—fie >3 2: 2% 2 and: >5 “Eu—Emu? u Max:085 dare—imam dfimwimo dioxins .wmwmzmflmmm .n._.a.m.3mo .od 96% 8 .odilamn >._. mm 525 a$235+ as p<E inane :0 33328 LEE dsofi .955 wEBo=e >50 was: 28.. 7:. omoQ on“ 2: 33??? Eco I 3383358 gaging QEuéusom— mmmmwummwwm savauosaaqo 5539: .9580 unsoE.::< .DHm 9 ma >§ on. 2: 2: £93 a. 2: + £25 fits £3 minus“ cos—:28 52v .8 - am Eh QueufimfideoésEdensgeé Exacemswdeofig39:32.22 wean—Eon “.2353 @2358 Bum—=28 Ann anew .0: Eatifiég:.E§§.€< 5&8??er mm 8 AND >3 .8 3 mm an 3m “we: 53-. “we: mm? no :0 cob .228 anEwfimE 3 9.55 >b 28 23:?» than :0 25;? 32on Ea 2: 02 mbguaéfim.‘ mhgu>¢£nm< 9.5 9:23 e 53m E5: nmax :dmogoaaé so 8 goes H =ocum>oc 33 ? Em? £3» 2:23 .653 >b 538w u San SdVQ 8.on SE5... ”333%" n>E g ESE mam SE3... .2 BEEN; :2. ”in "mm Am 3 9 ”am .9250 TH0098 [Table 9] 9 mm @025 Emfisa NE SN an 3; . . o M a « a a mm a 32 RE 2 mm Q .2 gm .é . . m n .0 £on o o o 0 o o mo fig o o c 0 o 0 “nogmofi. .3 .3 E .od E dd .oa .m d Ed d €735 “m “m .3233 "m mEBo=om .35 ”35 £95 “Slag? 6.130 $735+ 05 wiEooom cmoQ 9.9% x I @ESSEES zaugoememo 329:? @3339: 3338?: 5353? haséoama 33328 s 02 55 S o2 8 02 SEED + + 2: 295 8 :5 Be ~89 \ hacienmfid Egéoeweg rF Ea . . @8358 no Ehdhm new: Br? an R5238 33 8% §Emv<me - a a “we: xx. 20E? 326 €825 €25: 25:5 3%.; .038 am55 2: E 3 .5 . - seem :.n%3§.€< Edmaaoaei Eben E885 23:9: m.:o_o>a.£%< unease 3m; £3 Ego? u 5:33“. no.5 - . 3 EE 2% asew man 8.on 30m“ 03m Emvsmum “,1. Q ”am 3:50 TH0098 As shown in Figs- 14 and 15, Table 8 and Table 9, statistically icantly remarkably potentiated antitumor s were confirmed in all combinatorial use groups of the FTD/TPI combination drug and the anti—mouse PD—Ll antibody.

Additionally, it was confirmed that, while the TGI in the combinatorial use expected when assuming that the effect of combinatorial use of both drugs was additive was 74.7% and 79.8% respectively in the groups of 0.1 and 0.2 y/day of the anti~ mouse PD—Ll antibody, actually, more ent antitumor effects like 93.0% and 93.5% were confirmed” Thus, the effect of combinatorial use of the FTD/TPI combination drug and the anti— mouse PD-Ll antibody was shown to be synergistic effect.

In all co-administration groups, serious weight reduction exceeding —20% was not observed, and the side effects were acceptable degree.

Example 4: Combinatorial use of S—1+Compound l and anti—mouse PD—l antibody Mouse large bowel cancer cell line (GMT—93) was transplanted into the right side of the chest of 5 to 6 weeks old C57BL/6NJC1 mice after birth” After the tumor transplantation, the major axis (mm) and minor axis (mm) of tumor were measured, and the tumor volume (TV) was calculated” Then, the mice were divided into groups so that the mean TV of each group might be equal and the day of grouping (n = 8) was designated as Day 0.

The tegafur/gimeracil/oteracil potassium combination drug ("8- 1", tegafur : cil : oteracil = 1 : 0.4 : 1 (molar ratio), after the same) and Compound 1 ((R)-N—(1—(3— (cyclopentyloxy)phenyl)ethyl)—3—((2,4—dioxo—3,4—dihydropyrimidin— 1(2H)-yl)methoxy)propane—l—sulfonamide) were suspended in an TH0098 aqueous solution of 0.5% hydroxypropylmethyl cellulose. S-l dose was set to be 6.9 day (tegafur amount) (Anticancer Res. 32:2807-2812 (2012)), and Compound 1 was set to be 2,400 mg/kg/day, which is presumed to be the maximum dose administerable to a mouse.

The anti-mouse PD—l dy was prepared to be 0.1 mg/body/day.

S-1 and a mixed administration solution of 8—1 and Compound 1 were orally administered daily once a day for 28 days starting from the following day of grouping, and the ouse PD—l antibody was intraperitoneally administered on Day 1, 8, 15, and 22. The control group was orally administered with the aqueous on of 0.5% hydroxypropylmethyl cellulose daily once a day for 28 days.

As an index of the antitumor effect, TV was calculated in each group to determine the relative tumor volume (RTV) to Day 0, and Treated/control (T/C, %) was calculated by the following formula using mean values of the RTV of the drug administration groups and the untreated (control) group to evaluate antitumor effects.

TV (mm3) = (major axis x minor axisz) / 2 RTV = (TV on Day 29) / (TV on Day 0) T/C (%) = (mean RTV on Day 29 of drug stration groups) / (mean RTV on Day 29 of untreated group) x 100 The above RTV was plotted on each ement date. The result of comparing the time (day)—course change of RTV between each administration group is shown in Fig. 16 and Table 10.

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BWC (%) = ([(mouse body weight on Day 29) - (mouse body weight on Day 0)] / (mouse body weight on Day 0)) x 100 TH0098 [Table 11] 6m 3.2 Em tum m? R; 53 03m 232$ a « « a a an «S a; $2 3.2 3.: 86 .02 :38 o o o o o o .0 £23 w w m m m m ”£558..“ grad .w.

E85808 mgosom .315 3:353>~Q.u.q.o¢.wm-;3 :o.n,mu-;5 d§q2.w._b§ .3.mmfiwimaaesod“gran 6.32.»?>a9.u.w..o.n.mm-;3 .3. 08.2.? 2.: $8 wEEOooa Bum—:28 02 £3 >8 E5 5 809 Efifié I \afiawe 558?; §fivfiaoo§§m§ :Ezuofiegagmfie mmuufieooqumswfia 558?. :23 :o :8 3 g 83:88 5so we 3 3 35 ”8v - 63E b5 GEEK»? ocean omcano :0 Tog Ewfik u c men weshcoo 30m“ 2% Emucfim fim zuopfiidmaafiafi Esoauouzé éoeafidmoaoeésfm Egogoo:-m o5§fic£ u Am Qm TH0098 As shown in Fig. 17 and Table 11, statistically significant antitumor effects were observed in all drug administration groups when compared with the l group, and serious weight reduction exceeding —20% was not observed, and the side effects were acceptable degree.

The S—1+anti—mouse PD—l antibody administration group and the anti—mouse PD—l antibody administration group had the same T/C (%), thus failing to confirm an apparent potentiating effect.

While, in the ison with the S—1+Compond l+anti—mouse PD— 1 antibody administration group, the S—1+Compound l administration group, and the anti—mouse PD—l antibody administration group, the 3-drug inistration group was found to have a statistically significant effect of combinatorial use to any groups.

Given the above results, it is revealed that 8-1 which is a fluorinated pyrimidine antimetabolite does not notably potentiate the antitumor effect of the anti—PD—l dy as a single agent but notably potentiates the antitumor effect of the anti—PD—l antibody when used in combination with Compound 1 which is a dUTPase inhibitor. Thus, the results of the t tests indicate that the DNA function inhibitor can potentiate the antitumor effect of the anti—PD—l antibody.

Here, the present ion is not limited to each of embodiments and examples described above, and various modifications can be employed within the scope shown in the claims. Embodiments obtained by appropriately combining technical means each disclosed in different embodiments are also within the technical scope of the present invention” All of the scientific literatures and reference literatures described herein are hereby orated by reference.

Claims (18)

1. Use of a DNA function inhibitor and an immunomodulator for the manufacture of an antitumor agent for the treatment of cancer, wherein the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5, and wherein the immunomodulator is an anti-PD-1 antibody or an anti-PD-L1 antibody or a combination thereof, and wherein cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

2. The use according to claim 1, wherein the anti-PD-1 antibody is mab or pembrolizumab, and the D-L1 antibody is atezolizumab, durvalumab, or avelumab.

3. The use according to claim 1 or claim 2, wherein the dose per day of trifluridine on the administration date is 50 to 115% of the recommended dose when administered alone.

4. The use according to any one of claims 1 to 3, n the dose per day of trifluridine on the administration date is 35 to 80 day.

5. The use according to any one of claims 1 to 4, wherein the cancer to be targeted is large bowel cancer.

6. The use ing to any one of claims 1 to 5, wherein the cancer to be targeted is gastric cancer.

7. Use of a DNA function inhibitor for the manufacture of an antitumor agent for treating cancer, wherein the treatment comprises co-administration with an immunomodulator; wherein the DNA function inhibitor is a ation drug containing trifluridine and tipiracil hydrochloride in a molar ratio of 1 : 0.5, and wherein the immunomodulator is an anti-PD-1 antibody or an anti-PD-L1 antibody or a combination thereof, and wherein cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

8. The use according to claim 7, wherein the anti-PD-1 antibody is nivolumab or pembrolizumab, and the anti-PD-L1 antibody is atezolizumab, durvalumab, or avelumab.

9. The use according to claim 7 or claim 8, wherein the dose per day of trifluridine on the administration date is 50 to 115% of the recommended dose when administered alone.

10. The use according to any one of claims 7 to 9, wherein the dose per day of ridine on the administration date is 35 to 80 mg/m2/day.

11. The use ing to any one of claims 7 to 10, wherein the cancer to be targeted is large bowel cancer.

12. The use according to any one of claims 7 to 11, wherein the cancer to be ed is gastric cancer.

13. Use of an immunomodulator for the manufacture of an antitumor agent for treating cancer, n the treatment comprises co-administration with a DNA function inhibitor; wherein the DNA function inhibitor is a combination drug containing trifluridine and tipiracil hloride in a molar ratio of 1 : 0.5, and wherein the immunomodulator is an anti-PD-1 antibody or an anti-PD-L1 antibody or a combination thereof, and wherein cancer to be targeted is gastrointestinal cancer, lung cancer, or breast cancer.

14. The use according to claim 13, wherein the anti-PD-1 dy is nivolumab or pembrolizumab, and the anti-PD-L1 antibody is atezolizumab, durvalumab, or avelumab.

15. The use ing to claim 13 or claim 14, wherein the dose per day of trifluridine on the administration date is 50 to 115% of the ended dose when administered alone.

16. The use according to any one of claims 13 to 15, wherein the dose per day of trifluridine on the administration date is 35 to 80 mg/m2/day.

17. The use according to any one of claims 13 to 16, wherein the cancer to be targeted is large bowel cancer.

18. The use ing to any one of claims 13 to 17, wherein the cancer to be targeted is gastric cancer.