WO2012159562A1 - 截短的人乳头瘤病毒33型l1蛋白 - Google Patents
截短的人乳头瘤病毒33型l1蛋白 Download PDFInfo
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- C12N2710/20034—Use of virus or viral component as vaccine, e.g. live-attenuated or inactivated virus, VLP, viral protein
Definitions
- the invention relates to the field of molecular virology and immunology.
- the present invention relates to a truncated human papillomavirus type 33 L1 protein, its coding sequence and preparation method, and virus-like particles comprising the same, which can be used for the prevention of HPV (especially HPV33) ) infections and diseases caused by infection with HPV (especially HPV33) such as cervical cancer.
- the invention further relates to the use of the above proteins and virus-like particles for the preparation of a pharmaceutical composition or vaccine for the prevention of HPV (especially HPV33) infection and infection by HPV (especially HPV33) Diseases such as cervical cancer.
- Human Papillomavirus belongs to the genus Papilomaviridae of the papillomavirus family and is a non-enveloped DNA virus.
- the viral genome is a silent chain closed-loop DNA with a size of approximately 7.2 to 8 kb and eight open reading frames.
- the viral genome can be divided into three regions according to its function: 1 early region (E), about 4.5 kb, encoding 6 non-structural proteins related to viral replication, transcription and transformation, including El, E2, E4 ⁇ E7;
- LCR long regulatory region
- the HPV virus particles are 45 to 55 nm in diameter, and the nucleocapsid is icosahedral. There are 72 shell particles consisting of L1 and L2.
- HPV has more than 90 subtypes, which cause skin and mucous membrane lesions in the human population. According to its relationship with tumorigenesis, HPV can be divided into three groups: 1 low or no carcinogenic risk group, including HPV6, 11, 39, 41, 42, 43; The cancer risk group, including HPV 31, 33, 35, 51, 52; 3 highly carcinogenic risk groups, including HPV 16, 18, 58, 45.
- HPV molecular epidemiological investigations confirmed that high-risk HPV infection is an important promoter of cervical cancer.
- HPV DNA detection rates are as high as 80% or more.
- Cervical cancer is a common female malignant tumor, and its incidence is second only to breast cancer, which is a serious threat to women's health. According to statistics, there are about 490,000 new cases worldwide each year, and about 270,000 people die from the disease (Boyle, P., and J. Ferlay. Ann Oncol 2005, 16:481-8). Of all cervical cancer cases, approximately 83% occur in developing countries, where cervical cancer can even account for 15% of female malignancies. In developed countries, this figure only accounts for 1.5%.
- HPV33 has a high infection rate among women with cervical cancer worldwide and is one of the most susceptible HPV types.
- HPV vaccines are Merck's Gardasil® and GSK's Cervarix®, which contain HPV6/11/16/18 and HPV16/18, respectively.
- VLP but does not include HPV33 type VLPs that are generally prevalent among women in China and Asia.
- HPV vaccines for women in developing countries such as China and Asia, especially for high-risk types such as HPV16, 18 and 33, are effective in preventing cervical cancer and improving the health of women (especially Chinese and Asian women). An effective way of doing things.
- HPV L1 protein is the major capsid protein with a molecular weight of 55-60 kDa and is the main target protein of HPV vaccine.
- the HPV L1 protein expressed in various expression systems can form a virus-Like Particle (VLP) similar in morphology to the native virus particle without the aid of the L2 protein.
- the virus-like particle is an icosahedral stereo-symmetric structure composed of 72 pentamers of L1 protein. It retains the natural epitope of the viral particle, has strong immunogenicity, and induces neutralizing antibodies against the same type of HPV virus (Kirnbauer, R., F. Booy, et al. 1992 Proc Natl Acad Sci USA 89 (24) ): 12180-4).
- the virus-like particles do not carry viral nucleic acid, have no potential carcinogenic risk, and have good safety. Therefore, VLP vaccine has become the main direction of HPV vaccine development.
- VLP vaccines The key to the development of HPV VLP vaccines is the ability to efficiently and efficiently prepare VLP samples.
- the more commonly used VLP expression systems can be divided into eukaryotic expression systems and prokaryotic expression systems.
- eukaryotic expression systems include a poxvirus expression system, an insect baculovirus expression system, and a yeast expression system.
- the HPV L1 protein expressed in the eukaryotic expression system has little natural conformational destruction and can spontaneously form VLPs. It is often necessary to perform a simple density gradient centrifugation to obtain purified VLPs, which provides great convenience for purification work.
- Due to the low expression level of the eukaryotic expression system and the high cultivation cost it has brought great difficulties to large-scale industrial production.
- the currently marketed HPV vaccine Gardasil® uses a Saccharomyces cerevisiae expression system with low expression and high production costs, so the price of the product is biased. High, affecting its wide application.
- HPV L1 protein by the E. coli expression system in prokaryotic expression systems has been reported.
- expression of HPV16 L1 protein by E. coli has been reported (Banks, L., G. Matlashewski, et al. (1987). J Gen Virol 68 (Pt 12): 3081-9).
- HPV LI proteins expressed by E. coli lose their natural conformation and cannot produce protective antibodies against HPV.
- HPB VLP Karlall, SR and JK Kulski (1995).
- the present invention is based, at least in part, on the surprising discovery by the inventors that the use of an E. coli expression system enables the mass expression of a truncated HPV33 L1 protein that induces a neutralizing antibody against HPV33, which has a high yield and is purified.
- the purity can be as high as 96% or higher, and the purified protein can be further treated to obtain virus-like particles which can induce protective antibodies against HPV33.
- the invention relates to a truncated HPV33 L1 protein or variant thereof which has a N-terminal truncation of 9-19 amino acids, such as 9, 10, compared to the wild-type HPV33 L1 protein. 11, 12, 13, 14, 15, 16, 17, 18 and 19 acids.
- the N-terminus of the truncated HPV33 L1 protein is truncated by 9, 11, 14, or 19 amino acids compared to the wild-type HPV33 L1 protein.
- the truncated HPV33 L1 protein (hereinafter also simply referred to as a truncated protein) has SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6 or SEQ ID NO: The illustrated amino acid sequence.
- the truncated protein has an amino acid sequence as shown in SEQ ID NO: 4.
- the invention features a polynucleotide encoding a truncated protein of the invention, or a variant thereof, and a vector comprising the polynucleotide.
- Vectors useful for insertion of a polynucleotide of interest include, but are not limited to, cloning vectors and expression vectors.
- the vector is, for example, a plasmid, a cosmid, a phage, a cosmid, and the like.
- the invention also relates to a host cell comprising the polynucleotide or vector described above.
- host cells include, but are not limited to, prokaryotic cells such as E. coli cells, and eukaryotic cells such as yeast cells, insect cells, plant cells, and animal cells (e.g., mammalian cells, such as mouse cells, human cells, etc.).
- the host cell of the invention may also be a cell line, such as a 293T cell.
- the invention relates to an HPV33 virus-like particle, wherein the virus-like particle comprises or consists of a truncated protein of the invention or a variant thereof.
- the HPV33 virus-like particle of the invention comprises a N-terminal truncation of 9-19 amino acids, such as 9 compared to the wild-type HPV33 L1 protein. , a truncated HPV33 L1 protein of 11, 11 or 19 amino acids, or consists of or formed from the protein. In a particularly preferred embodiment, the HPV33 virus-like particle of the invention comprises or consists of or is formed of a truncated HPV33 L1 protein having the sequence set forth in SEQ ID NO: 4, 5, 6 or 7.
- the invention also relates to a composition
- a composition comprising the above-described truncated protein or variant thereof, or the above polynucleotide or vector or host cell or HPV33 virus-like particle.
- the composition comprises a truncated protein of the invention or a variant thereof.
- the composition comprises HPV33 virus-like particles of the invention.
- the present invention is also a pharmaceutical composition or vaccine comprising the HP V33 virus-like particle of the present invention, optionally further comprising a pharmaceutically acceptable carrier and/or excipient.
- the pharmaceutical composition or vaccine of the present invention can be used for preventing HPV (especially HPV33) infection or diseases caused by HPV (especially HPV33) infection such as cervical cancer and the like.
- the HPV33 virus-like particle is present in an amount effective to prevent HPV infection or cervical cancer.
- the pharmaceutical composition or vaccine of the present invention further comprises at least one virus-like particle selected from the group consisting of: HPV6 L1 protein virus-like particle, HPV11 L1 protein virus-like particle, HPV16 L1 protein virus-like particle , HPV18 L1 protein virus-like particles, HPV31 L1 protein virus-like particles, HPV45 L1 protein virus-like particles, HPV52 L1 protein virus-like particles, HPV58 L1 protein virus-like particles; preferably, these virus-like particles are each independently for preventing cervical cancer Or an effective amount of the corresponding HPV subtype infection is present.
- compositions or vaccines of the invention may be administered by methods well known in the art such as, but not limited to, administration by oral or injection.
- a particularly preferred mode of administration is injection.
- the pharmaceutical composition or vaccine of the invention is single The dosage form is administered.
- the amount of HPV33 virus-like particles contained per unit dose is from 5 g to 80 g, preferably from 20 g to 40 g.
- the present invention relates to a method for obtaining a truncated protein of the present invention, which comprises expressing a truncated protein of the present invention using an E. coli expression system, and then purifying the cleavage supernatant containing the truncated protein.
- the method of obtaining a truncated protein of the invention comprises a) expressing said truncated protein in E. coli,
- Escherichia coli expressing the truncated protein is disrupted in a solution having a salt concentration of 100 mM to 600 mM, and the supernatant is separated.
- c) reduce the salt concentration of the supernatant obtained in b) to 100 mM or less with water or a low salt solution, as low as 0, and collect the precipitate.
- the invention also relates to a method of obtaining a HPV L1 protein, such as a truncated protein of the invention, comprising
- the present invention also relates to a method of obtaining HPV33 virus-like particles of the present invention, Is it obtained in the truncated protein of the present invention? On, including the steps:
- the invention further relates to a method of preparing a vaccine comprising mixing a HPV33 virus-like particle of the invention with a pharmaceutically acceptable carrier and/or excipient, optionally further mixing one or more selected from the group consisting of HPV6, 11 , 16, 18, 31, 45, 52 and 58 HPV-type virus-like particles.
- the obtained vaccine can be used to prevent HPV (especially HPV33) infection or diseases caused by HPV (especially HPV33) infection such as cervical cancer and the like.
- the present invention relates to a method of preventing HPV infection or a disease caused by HPV infection comprising administering a prophylactically effective amount of a HPV33 virus-like particle or pharmaceutical composition or vaccine according to the present invention to a subject .
- the HPV infection is an HPV33 infection.
- the disease caused by HPV infection includes, but is not limited to, cervical cancer.
- the subject is a mammal, such as a human.
- the invention relates to the use of a truncated protein or HPV33 virus-like particle according to the invention for the preparation of a pharmaceutical composition or vaccine for the prevention of HPV infection or a disease caused by HPV infection .
- the HPV infection is an HPV33 infection.
- the disease caused by HPV infection includes, but is not limited to, cervical cancer. Description and explanation of related terms in the present invention
- the expression "protein having a N-terminally truncated acid” means that the first-X of the N-terminus of the protein is replaced with a methylthio acid residue encoded by a start codon (for initiation of protein translation).
- a protein obtained by amino acid residues for example, the HPV33 L1 protein with N-terminally truncated 9 amino acids means that the methionine residue encoded by the initiation codon replaces the 1st - 9th amino acid residue at the N-terminus of the wild-type HPV33 L1 protein. The protein obtained.
- the term "variant” refers to a protein which is linked to the amino acid sequence of a truncated HPV33 L1 protein of the invention (such as the protein of SEQ ID NO: 4, 5, 6 or 7). Having one or more (eg, 1-10 or 1-5 or 1-3) different amino acids or having at least 60%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% identity, and it retains the necessary properties of the truncated protein.
- essential property herein may be one or more of the following characteristics: ability to induce a neutralizing antibody against HPV33; capable of soluble expression in Escherichia coli; high yield can be obtained by the expression purification method of the present invention Purify the protein.
- identity is a measure of the similarity of a nucleotide sequence or an amino acid sequence. The sequences are usually arranged to obtain the greatest match. "Identity” itself has a well-known meaning in the art and can be disclosed Algorithm (for example
- E. coli expression system refers to an expression system consisting of E. coli (strain) and a vector, wherein E. coli (strain) is derived from commercially available strains such as, but not limited to: ER2566, BL21 ( DE3), B834 (DE3), BLR (DE3)schreib
- vector refers to a nucleic acid delivery vehicle into which a polynucleotide can be inserted. When the vector enables expression of a protein encoded by the inserted polynucleotide, the vector is referred to as expression.
- Vectors can be introduced into a host cell by transformation, transduction or transfection, such that the genetic material elements they carry are expressed in the host cell.
- Vectors are well known to those skilled in the art, including but not limited to: plasmids; phage; Plasmids and so on.
- the term "truncated HPV33 L1 protein” refers to a protein obtained by removing one or more amino acids at the N-terminus and/or C-terminus of the wild-type HPV33 L1 protein, wherein examples of the wild-type HPV33 L1 protein include However, it is not limited to the full-length L1 protein such as P06416.1, ACV84008.1, ACV84011.1, ACV84012.1 or ACL12333.1 in the NCBI database.
- truncated HPV33 L1 protein gene fragment refers to a gene fragment that, at the 5' or 3' end, is liberated from the wild-type HPV33 L1 protein gene (cDNA), encoding one or more amino acids.
- Nucleotides, wherein the full-length sequence of the wild-type HPV33 L1 protein gene is, for example but not limited to, the following sequences in the NCBI database: GO479013.1, GQ479014.1, M12732.1, GQ479012.1, GQ479015.1, GQ479016.1, EU918766 .1 , GQ479017.1 , GQ479018.1 or GQ479019.1, etc.
- the term "pharmaceutically acceptable carrier and/or excipient” means a carrier and/or excipient which is pharmacologically and/or physiologically compatible with the subject and the active ingredient, which is in the art It is well known (see, for example, Remington's Pharmaceutical Sciences. Edited by Gennaro AR, 19th ed. Pennsylvania: Mack Publishing Company, 1995) and includes, but is not limited to, pH adjusters, surfactants, adjuvants, ionic strength enhancers.
- pH adjusting agents include, but are not limited to, phosphate buffers; surfactants include, but are not limited to, cationic, anionic or nonionic surfactants such as Tween-80; adjuvants include, but are not limited to, aluminum Adjuvants (eg, aluminum hydroxide), Freund's adjuvant (eg, complete Freund's adjuvant); ionic strength enhancers include, but are not limited to, sodium chloride.
- adjuvants include, but are not limited to, aluminum Adjuvants (eg, aluminum hydroxide), Freund's adjuvant (eg, complete Freund's adjuvant); ionic strength enhancers include, but are not limited to, sodium chloride.
- an effective amount means an amount effective to achieve the intended purpose.
- an effective amount for preventing a disease e.g., HPV infection
- chromatography includes, but is not limited to: ion exchange chromatography (eg cation exchange chromatography), hydrophobic interaction chromatography, adsorption chromatography (eg hydroxyapatite chromatography), gel filtration (gel discharge) Resistance) chromatography, affinity chromatography.
- the truncated HPV33 L1 protein of the present invention is preferably obtained by the following steps: Escherichia coli expressing the truncated HPV33 L1 protein is disrupted in a buffer having a salt concentration of 100 - 600 mM, preferably 200 - 500 mM, The solution is centrifuged to obtain a supernatant; the salt concentration of the resulting supernatant is lowered to a salt concentration of 100 mM - OmM with water or a solution having a low salt concentration (usually lower than the salt concentration for the crushing), whereby the truncated HPV33 L1 protein is on Precipitating in the clear solution; re-dissolving the precipitate in a solution containing a reducing agent and a salt concentration of 150 - 2500 mM, preferably 200 mM or more, thereby separating a solution containing the truncated HPV33 L1 protein, wherein the protein has a purity of at least 50
- Buffers useful in the methods of the invention are well known in the art and include, but are not limited to, Tris buffer, phosphate buffer, HEPES buffer, MOPS buffer, and the like.
- disruption of host cells can be accomplished by a variety of methods well known to those skilled in the art including, but not limited to, homogenizer disruption, homogenizer disruption, sonication, milling, high pressure extrusion, lysozyme treatment, and the like. .
- Salts useful in the process of the invention include, but are not limited to, acid salts, basic salts, neutral salts such as alkali metal salts, alkaline earth metal salts, ammonium salts, hydrochloride salts, sulfate salts, A bicarbonate, a phosphate or a hydrogen phosphate, in particular one or more of NaCl, KC1, NH 4 C1, (NH 4 ) 2 S0 4 .
- a particularly preferred salt is NaCl.
- Reducing agents useful in the methods of the invention include, but are not limited to, DTT, 2-mercaptoethanol, in amounts including, but not limited to, 10 mM to 100 mM.
- the HPV33 virus-like particle according to the present invention can be obtained by the following steps: further separating the truncated HPV33 L1 protein having a purity of at least 50% as described above by, for example, color transfer chromatography to obtain a purified truncated protein solution; removing the solution
- the reducing agent gives the HPV33 virus-like particles.
- the manner in which the reducing agent is removed is known in the art and includes, but is not limited to, dialysis, ultrafiltration or chromatography.
- HPV virus-like particles can be divided into eukaryotic expression systems and prokaryotic expression systems.
- HPV L1 protein expressed in the eukaryotic expression system has little natural conformational destruction and can spontaneously form VLPs, and it is often necessary to carry out a simple purification process to obtain VLPs with the correct conformation.
- current eukaryotic expression systems such as baculovirus expression systems and yeast expression systems have the disadvantages of low expression levels and high cultivation costs, which have brought great difficulties to large-scale industrial production.
- the E. coli expression system has the advantages of low culture cost and large expression amount.
- HPV L1 proteins expressed in E. coli tend to lose the correct native conformation and are expressed in the form of inclusion bodies in the pellet. The renaturation of proteins expressed in inclusion bodies is still a worldwide problem. Reconciliation difficulties and inefficiencies make it difficult to obtain VLPs with correct conformation from inclusion bodies in large-scale production and can only be limited to small-scale laboratory studies.
- HPV L1 can also be solublely expressed in E. coli in the correct conformation, its expression level is low. And purified from E. coli lysate containing a wide variety of soluble proteins
- the HPV LI protein is also quite difficult, often requiring the use of fusion expression and affinity chromatography, which often requires expensive enzymes, and therefore, industrial production cannot be achieved.
- the N-terminally truncated HPV33 L1 protein provided by the present invention and the preparation method thereof effectively solve the above problems.
- the present invention uses an E. coli expression system to express the N-terminally truncated HPV33 L1 protein, ensuring its high expression level.
- the present invention selectively precipitates the truncated protein in the E. coli lysate supernatant by mild means, and then redissolves the truncated protein with a salt-containing buffer to thereby ensure the purity of the protein while maintaining the correct conformation of the truncated protein.
- the obtained truncated protein solution can be further purified directly by chromatography such as ion exchange chromatography and hydrophobic exchange chromatography to obtain a high-purity protein of interest (for example, purity of 96%).
- the obtained high-purity truncated protein can be assembled into a virus-like particle, and the virus-like particle can induce a high titer neutralizing antibody against HPV33 in vivo, has good immunogenicity, and is a good vaccine. Form, can be used to prevent HPV33 infection in humans.
- the present invention has the following advantages:
- the truncated protein of the present invention can realize a large amount of expression in an E.
- the truncated protein of the present invention and the preparation method thereof can be applied to large-scale industrial production, and it is possible to produce a large-scale industrial production of cervical cancer vaccine.
- Figure 1 shows the results of SDS polyacrylamide gel electrophoresis of the HPV33N9C-L1 protein obtained in the different steps of Example 2.
- Lane M Protein molecular weight marker
- Lane 1 Broken supernatant (ie, supernatant obtained after centrifugation)
- Lane 2 Salt-free precipitated product (ie, precipitate obtained by centrifugation after centrifugation)
- Lane 3 Heavy The supernatant after dissolution (i.e., the supernatant obtained by re-dissolving the salt-free precipitated product after centrifugation);
- Lane 4 Precipitate after reconstitution (i.e., the precipitate obtained by centrifugation after re-dissolving the salt-free precipitated product).
- the results showed that the purity of the HPV33N9C-L1 protein increased from about 10% to about 70% after the step of precipitation and reconstitution (see lanes 1 and 3).
- Fig. 2 shows the results of SDS polyacrylamide gel electrophoresis of HPV33N9C-L1 obtained by HIC (hydrophobic interaction chromatography) purification in Example 3.
- Lane M Protein molecular weight marker
- Lane 1 Pre-purification sample with Butyl Sepharose 4 Fast Flow column
- Lane 2 Butyl Sepharose 4 Fast Flow column breakthrough fraction
- Lane 3 Butyl Sepharose 4 Fast Flow column 200 mmol/L NaCl Elution fraction ( ⁇ ).
- the results showed that the purity of HPV33N9C-L1 protein was over 98% after purification by Butyl Sepharose 4 Fast Flow column (see lane 3).
- a large number of virus-like particles with a radius of about 25 nm are visible in the field of view, and the particle size is consistent with the theoretical size and is consistent.
- Figure 4 shows the HPV33N9C-L1 virus-like particle obtained in Example 4. Dynamic light scattering observations. The results showed that the HPV33N9C-L1 virus-like particle had a hydration molecular dynamic radius of 27.77 nm and a particle assembly percentage of 100%.
- Figure 5 shows the neutralizing antibody titer of the serum at different stages after inoculation of mice with HPV33N9C-L1 virus-like particles in Example 5. 2 weeks after the first immunization, antibody titers increased rapidly; elapsed after the first booster immunization, neutralizing antibody titers that can achieve a high level of 105.
- Figure 6 shows the neutralizing antibody titer of the serum at different stages after inoculation of rabbits with HPV33N9C-L1 virus-like particles in Example 5.
- antibody titers increased rapidly; after the first vaccination, the neutralizing antibody titer that is able to achieve a higher level of 106.
- Figure 7 shows the HPV33 L1 protein of the N-terminally truncated 11, 14 or 19 amino acids obtained in Example 6 - HPV33N11C-L1, HPV33N14C-L1, HPV33N19C-L1 (the columns are SEQ ID NO: 5.
- Results of SDS polyacrylamide gel electrophoresis of SEQ ID NO: 6, SEQ ID NO: 7 Lane M, protein molecular weight marker; Lane 1, HPV33N11C-L1 protein, loading volume ⁇ ; Lane 2, HPV33N14C-L1 protein, loading volume ⁇ ; Lane 3, HPV33N19C-L1 protein, loading volume 10 ⁇ 1.
- the results showed that the protein purity of the proteins HPV33N11C-L1, HPV33N14C-L1 and HPV33N19C-L1 obtained in Example 6 was over 98%.
- Fig. 8 shows the results of transmission electron microscopic observation (50,000 times, 0.2 um) of the HPV33N11C-L1 virus-like particles described in Example 6. The results showed that a large number of virus-like particles with a radius of about 25 nm were visible in the field of view, and the particle size was consistent with the theoretical size and was consistent.
- Figure 9 shows the results of transmission electron microscopic observation (50,000 times, 0.2 um) of the HPV33N14C-L1 virus-like particles described in Example 6. The results show that a large number of virus-like particles with a radius of about 25 nm are visible in the field of view. Symbol, and are consistent.
- Fig. 10 shows the results of transmission electron microscopic observation (50,000 times, 0.2 um) of the HPV33N19C-L1 virus-like particles described in Example 6. The results showed that a large number of virus-like particles with a radius of about 25 nm were visible in the field of view, and the particle size was consistent with the theoretical size and was consistent.
- Fig. 11 shows the results of dynamic light scattering observation of the HPV33N11C-L1 virus-like particle described in Example 6. The results showed that the hydration molecular dynamic radius of the HPV33N11C-L1 virus-like particle was about 28.34 nm, and the particle assembly percentage was 100%.
- Fig. 12 shows the results of dynamic light scattering observation of the HPV33N14C-L1 virus-like particle described in Example 6. The results showed that the hydration molecular dynamics radius of HPV33N14C-L1 virus-like particles was about 26.03 nm, and the particle assembly percentage was 100%.
- Fig. 13 shows the results of dynamic light scattering observation of the HPV33N19C-L1 virus-like particle described in Example 6. The results showed that the hydration molecular dynamic radius of HPV33N19C-L1 virus-like particles was about 27.11 nm, and the particle assembly percentage was 100%.
- HPV33S 5,-CAT ATG TCC GTG TGG CGG CCT AG-3' (SEQ ID NO: 12) is a forward primer
- HPV33 R 5,-GTC GAC TTA TTT TTT AAC CTT TTT GC-3' (SEQ ID NO: 13) is a reverse primer
- PCR reaction was carried out in a PCR instrument (Biometra, T3) under the following conditions to prepare a full-length HPV33 L1 gene. Fragment.
- HPV33-positive multiple samples a size-specific 1.5 kb product was amplified and three HPV33 L1 gene sequences (SEQ ID ⁇ : 1, 2 and 3) were obtained by sequencing.
- SEQ ID NO: 1 is exemplarily used as a template for preparing a DNA fragment encoding the truncated protein of the present invention. Construction of a non-fusion expression vector for truncated HPV33 L1 gene
- HPV33 L1 full-length gene fragment (SEQ ID NO: 1) obtained in the previous step was used as a template, and HPV33N9F: 5'-CATATs ACA gTg TAC CTg CCT CCT-3' (SEQ ID NO: 14) was used as a forward primer (its primer) Introducing the restriction endonuclease Ndel site CAT ATG at the 5' end, ATG is the initiation codon in the E.
- HPV33R S'-GTC GAC TTA TTT TTT AAC CTT TTT GC-3' (SEQ ID NO: 13) as a reverse primer (the 5' end introduced a restriction endonuclease Sflfl site) in a PCR thermocycler
- the PCR reaction was carried out in (Biometra T3) under the following conditions.
- a size-specific DNA fragment of about 1.5 kb was amplified.
- the PCR product was ligated to a commercially available pMD18-T vector (manufactured by TAKARA Co., Ltd.), and transformed into Escherichia coli; the plasmid was extracted and identified by NdellSaH digestion to obtain a positive clone pMD 18-T- inserted into the truncated HPV33 L1 gene.
- the nucleotide sequence of the inserted fragment of the pMD18-T-HPV33N9C-L1 plasmid was determined as shown in SEQ ID NO: 8, which encodes an amino acid sequence such as SEQ. ID NO: 4 is shown.
- the protein corresponding to this sequence was N-terminally truncated with 9 amino acids and the C-terminal untruncated HPV33 L1 protein, which was named HPV33N9C-L1.
- the pMD18-T-HPV33N9C-L1 plasmid described above was digested with ⁇ to obtain a HPV33N9C-L1 gene fragment.
- the fragment was ligated with the non-fusion expression vector pTO-T7 (Luo Wenxin et al., J. Bioengineering, 2000, 16:53-57) digested with iVi ⁇ IA ⁇ n, and transferred into ER2566 bacteria; plasmid, NdellSall enzyme
- the positive expression clone pTO-T7-HPV33N9C-L1 inserted into the fragment of interest was identified.
- the TO ⁇ pTO-T7-HPV33N9C-Ll plasmid (0.15 mg/ml) was transformed into 40 ⁇ of the competent Escherichia coli ER2566 (purchased from New England Biolabs) prepared by the calcium chloride method, and coated on the kana containing Solid LB medium (final concentration 25mg/mL, the same below) solid LB medium (LB medium composition: 10g / L peptone, 5g / L yeast powder, 10g / L sodium chloride, the same below), and static at 37 ° C Incubate for 10-12 hours until the single colony is clearly distinguishable. Pick a single colony into a tube containing 4 mL of liquid LB medium (containing kanamycin) at 37. Incubate at 220 rpm for 10 hours, and take 1 mL of the bacterial solution and store at -70 °C.
- the Escherichia coli carrying the recombinant plasmid pTO-T7-HPV33N9C-L1 was taken out in C, and inoculated into 50 ml of LB liquid medium containing kanamycin at 200 rpm, 37.
- the culture was carried out for about 8 hours at C; then, it was transferred to 10 bottles of 500 ml of kanamycin-containing LB medium (5 ml of the bacterial solution per bottle), and cultured at 200 rpm, 37 ° C overnight, as a seed liquid.
- Feed preparation 30% peptone and yeast bone mixture (20 g peptone, 10 g yeast bone dissolved to 100 ml), 50% glucose (50 g dissolved to 100 ml), 121. C Sterilize for 20 min.
- Feeding 50% glucose and 30% peptone and yeast bone mixture were mixed at a solute mass ratio of 2:1.
- the flow acceleration is as follows: first hour: 5%; second hour: 10%; third hour:
- the cells were resuspended in a ratio of 10 mL of lysate (20 mM Tris buffer, pH 7.2, 300 mM NaCl) to lg cells.
- the cells were disrupted 5 times with a pressure of 600 bar using an APV homogenizer (An Invensys Group product).
- the bacterial cell disrupted solution was centrifuged at 13500 rpm (30000 g) for 15 min, and the supernatant (i.e., the supernatant of the bacteria) was taken.
- the supernatant was detected by 10% SDS-polyacrylamide gel electrophoresis, at which time the purity of HPV33N9C-L1 in the supernatant was approximately 10% (see Figure 1, lane 1).
- the supernatant was dialyzed using a CENTRASETTE 5 tangential flow device (PALL product) with a molecular weight cut-off of 30 kDa, a dialysate of 10 mM phosphate buffer pH 6.0, a dialysis volume of three times the supernatant volume, and an operating pressure of 0.5 psi, flow rate 500 mL/min, tangential flow rate 200 mL/min.
- PALL product CENTRASETTE 5 tangential flow device
- the precipitate was harvested by centrifugation at 9,500 rpm (12000 g) for 20 min using a Beckman J25 high speed centrifuge (i.e., salt-free precipitated product).
- the pellet was resuspended in 1/10 supernatant volume of 20 mM calcium buffer pH 8.0, 20 mM DTT, 300 mM NaCl, stirred for 30 min, then centrifuged at 13500 rpm (30000 g) for 20 min using a Beckman J25 high speed centrifuge, and the supernatant was harvested and harvested.
- Precipitation ie, precipitation after reconstitution).
- the supernatant was diluted to 3 volumes with 20 mM phosphate buffer pH 8.0, 20 mM DTT to give a final NaCl concentration of 0.1 M, then 0.22 ⁇ m
- the pore size filter was filtered and the obtained sample (i.e., the supernatant after reconstitution) was used for cation exchange chromatography purification (as described in Example 3).
- Take 150 ⁇ filtered sample add 0 ⁇ L ⁇ 6 ⁇ Loading Buffer (12% (w/v) SDS, 0.6% (w/v) bromopan blue, 0.3M Tris-HCl pH 6.8, 60% (v/v) glycerol, 5% ( ⁇ / ⁇ ) ⁇ -mercaptoethanol), mix and mix at 80.
- AKTA explorer 100 preparative liquid phase color transfer system manufactured by GE Healthcare (formerly Amershan Pharmacia).
- Chromatography medium SP Sepharose 4 Fast Flow (GE Healthcare). Column volume: 5.5cmx20cm
- Buffer 20 mM calcination buffer ⁇ 8 ⁇ 0, 20 mM DTT
- the sample was a solution of HPV33N9C-L1 protein having a purity of about 70%, which was filtered through a 0.22 ⁇ m pore size filter obtained in Example 2.
- the elution procedure was: 400 mM NaCl eluted the heteroprotein, 800 mM NaCl eluted the target protein, and 800 mM NaCl eluted fractions were collected.
- Buffer 20 mM calcin buffer pH 8.0, 20 mM DTT
- the sample was: 800 mM NaCl eluted fraction obtained in the previous step, and the NaCl concentration was diluted to 0.5M.
- the elution procedure was as follows: 500 mM NaCl was used to elute the heteroprotein, and 100 mM NaCl was used to elute the target protein, and the eluted fraction at a concentration of 100 mM NaCl was collected.
- AKTA explorer 100 preparative liquid phase color transfer system manufactured by GE Healthcare (formerly Amershan Pharmacia).
- Buffer 20 mM silicic acid buffer pH 8.0, 20 mM DTT.
- the sample is: The lOOOOmM NaCl elution fraction obtained in the previous step.
- the elution procedure was as follows: lOOOmM NaCl eluted the heteroprotein, the target protein was eluted with 200 mM NaCl, and the eluted fraction at a concentration of 200 mM NaCl was collected. Take an elution fraction of 150 ⁇ at a concentration of 200 mM NaCl, add 30 L of 6X Loading Buffer, and mix at 80. C water bath lOmin; then ⁇ was electrophoresed in a 10% SDS-polyacrylamide gel at 120 V for 120 min; then the electrophoresis bands were visualized by Coomassie blue staining. The electrophoresis results are shown in Figure 2. The results showed that the purity of the HPV33N9C-L1 protein was greater than 98% after the above purification step.
- Example 4 Assembly of HPV33N9C-L1 virus-like particles
- the instrument system was a CENTRASETTE 5 tangential flow system produced by PALL; the molecular weight cut-off of the membrane package was 30 kDa; and the sample was HPV33N9C-L1 with a purity greater than 98% obtained in Example 3.
- Refolding of the sample Fully exchange the sample buffer with renaturation buffer (50 mM PB (sodium phosphate buffer) pH 6.0, 2 mM CaCl 2 , 2 mM MgCl 2 , 0.5 M NaCl, 0.003% Tween-80) The volume is more than 10 times the original volume of the sample.
- the tangential flow device was operated at a pressure of 0.5 psi and a tangential flow rate of 10 mL/min. After the renaturation buffer was exchanged, exchange was carried out with storage buffer (20 mM PB (sodium phosphate buffer) pH 6.5, 0.5 M NaCl), and the exchange volume was 4 times or more the sample volume.
- the tangential flow device was operated at a pressure of 0.5 psi and a tangential flow rate of 25 mL/min. After the exchange was completed, the sample was sterile-filtered using a PALL 0.20 ⁇ filter to obtain HPV33N9C-L1 virus-like particles, which were stored at 4 e C for use.
- Example 5 Morphological detection of HPV33N9C-L1 VLP and determination of its immunogenicity
- the instrument used was a 100 kV transmission electron microscope manufactured by JEOL, and the magnification was 100,000 times.
- the HPV33N9C-L1 virus-like particles obtained in Example 4 were negatively stained with 2% phosphotungstic acid pH 7.0, and fixed on a carbon-coated copper mesh for observation. Electron microscopy As shown in Fig. 3, it can be seen that a large number of virus-like particles having a radius of about 25 nm are uniform in size and appear in a hollow form.
- the instrument used was a DynaPro MS/X dynamic light scattering instrument (including temperature controller) manufactured by Protein Solutions of the United States, and the algorithm used was the Regulation algorithm.
- the sample was the HPV33N9C-L1 virus-like particle obtained in Example 4.
- the sample was filtered through a 0.22 ⁇ m filter and measured. The measurement results are shown in Figure 4. The results show that the hydration molecular dynamics radius of HPV33N9C-L1 VLP is 27.77 nm.
- HPV is difficult to culture in vitro, and HPV hosts are highly specific, difficult to propagate on hosts other than humans, and lack suitable animal models, in order to quickly assess the immunoprotection of HPV vaccines, effective in vitro development is required. Neutralize the experimental model.
- HPV pseudovirus is built as follows:
- Plasmid p33Llh (pAAV vector carrying the nucleotide sequence encoding HPV33 L1 protein (NCBI database, P06416.1)
- plasmid p33L2h carrier encoding HPV33 L2 protein (NCBI database, P06418.1) was purified by CsCl density gradient centrifugation.
- Nucleotide sequence of pAAV vector and green fluorescent protein gene
- the plasmid pN31-EGFP pN31-EGFP and the above pAAV vectors were all given by Professor John T. Schiller of NIH). Methods for purifying plasmids using CsCl density gradient centrifugation are well known in the art, see Molecular Cloning: Third Edition.
- 293FT cells (Invitrogen) grown in 10 cm cell culture were co-transfected with calcium phosphate transfection method using purified p33Llh, p33L2h, and pN31-EGFP 40 g each.
- Calcium phosphate transfection methods are well known in the art, see Molecular Cloning: Third Edition.
- HEPES solution 1 M Hepes per 50 mL of deionized water containing 125 ⁇ L ⁇ i 4 .C stored at pH 7.3
- 1 mL of 0.5 mol/L CaCl 2 Mix the solution, mix well, then add 2mL 2xHeBS solution (0.28M NaCl (16.36g), 0.05M HEPES (11.9g), 1.5mM Na 2 HP0 4 (0.213g), dissolved in 1000mL deionized water.
- the infection rate is the percentage of the number of cells in the positive zone of the test cell sample minus the number of uninfected control cell samples in the positive zone.
- Infection inhibition rate (1 - infection rate of wells added to serum / infection rate of wells not added to serum) ⁇ %.
- Antibody neutralization titers are defined as: Maximum dilution multiples that achieve infection inhibition rates above 50%. Antibodies that achieve 50% inhibition of infection after 50-fold dilution are considered to have neutralizing ability.
- mice were used to evaluate the immunoprotective properties of the HPV33 VLP of the present invention.
- the immunized animals were 8 SPF BALB/c mice aged 4-5 weeks.
- HPV33N9C-L1 virus-like particles were prepared according to the methods described in Examples 1-4.
- the granules were diluted to 0.1 mg/ml and then an equal volume of complete Freund's adjuvant (for primary immunization) or an equal volume of incomplete Freund's adjuvant (for booster immunization) was added and mixed well.
- the immunization schedule was: primary immunization at 0 weeks; enhanced at 2, 4 and 6 weeks.
- the mode of immunization is intramuscular injection.
- the initial immunization dose is lO g/only, and the booster dose is lO g/only.
- the immunized animals were 4 female rabbits of 6 to 8 weeks old (purchased from the Guangxi Provincial Center for Disease Control and Prevention).
- the HPV33N9C-L1 virus-like particles prepared in Examples 1-4 were diluted to 1.0 mg/ml, and then an equal volume of complete Freund's adjuvant (for primary immunization) or an equal volume of incomplete Freund's adjuvant was added. For boosting immunity), mix evenly.
- the immunization schedule was: initial immunization at 0 weeks; enhanced at 4, 8 and 12 weeks.
- the mode of immunization was intramuscular injection.
- the initial immunization dose was 1.0 mg/mouse
- the booster immunization dose was 1.0 mg/mouse.
- HPV33 virus-like particle obtained by the method of the present invention has good immunogenicity and can induce a high titer neutralizing antibody in an animal, thereby being useful as a vaccine for preventing HPV infection.
- Example 6 Preparation and morphological observation of HPV33N11C-L1, HPV33N14C-L1, HPV33N19C-L1 protein and virus-like particles
- HPV33 L1 protein with N-terminally truncated 11, 14 or 19 acid groups according to the methods described in Examples 1-3 (the acid sequences are respectively SEQ ID NO: 5, 6, 7; nucleosides are SEQ ID NO: 9, 10, 11), respectively.
- the purity of these proteins is above 98% (see Figure 7).
- HPV33N11C-L1, HPV33N14C-L1, HPV33N19C-L1 proteins were assembled into virus-like particles according to the method of Example 4.
- HPV33N11C-L1, HPV33N14C-L1, and HPV33N19C-L1 virus-like particles were observed by transmission electron microscopy and dynamic light scattering according to the method described in Example 5. The results are shown in Figure 8-13.
- Figures 8, 9 and 10 show that these truncated proteins form virus-like particles with a radius of about 25 nm, and the particle size is consistent with the theoretical size and uniform.
- Figures 11, 12 and 13 show that the hydration molecular dynamics of these virus-like particles are around 27 nm and the particle assembly percentage is 100%.
- HPV33N11C-L1, HPV33N14C-L1, HPV33N19C-L1 virus-like particles obtained by the present invention also have good immunogenicity and can induce high titer in animals. And antibodies, which can be used as a vaccine against HPV infection. While the invention has been described in detail, the embodiments of the invention . The full scope of the invention is indicated by the appended claims and any equivalents thereof.
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BR112013030150A BR112013030150A2 (pt) | 2011-05-25 | 2012-05-22 | proteína l1 hpv33 truncada ou variante da mesma, ácido nucléico isolado, vetor, célula hospedeira, partícula do tipo viral hpv33, composição, composição farmacêutica ou vacina, método para obter uma proteína l1 hpv33 truncada, método para preparar a partícula do tipo viral hpv33, método para preparar uma vacina, método para prevenir a infecção hpv ou uma doença causada pela infecção de hpv e uso da proteína l1 hpv33 truncada ou variante da mesma |
DK12788749.5T DK2716653T3 (en) | 2011-05-25 | 2012-05-22 | TRUNCATED L1 PROTEIN OF HUMANT PAPILLOMAVIRUS TYPE 33 |
US14/122,150 US9249193B2 (en) | 2011-05-25 | 2012-05-22 | Truncated L1 protein of human papillomavirus type 33 |
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CN103936840B (zh) * | 2013-01-18 | 2019-04-09 | 北京康乐卫士生物技术股份有限公司 | 重组的人乳头瘤病毒33型l1蛋白及其用途 |
CN104211782B (zh) * | 2013-06-04 | 2017-11-17 | 厦门大学 | 截短的人乳头瘤病毒45型l1蛋白 |
CN106399329B (zh) * | 2015-08-12 | 2021-06-11 | 北京康乐卫士生物技术股份有限公司 | 33型重组人乳头瘤病毒病毒样颗粒及其制备方法 |
WO2017092710A1 (zh) * | 2015-12-04 | 2017-06-08 | 厦门大学 | 一种人乳头瘤病毒58型l1蛋白的突变体 |
CN106831959B (zh) * | 2015-12-04 | 2019-11-05 | 厦门大学 | 一种人乳头瘤病毒33型l1蛋白的突变体 |
BR112018011331A2 (pt) * | 2015-12-04 | 2019-04-30 | Xiamen Innovax Biotech Co., Ltd. | mutante de proteìna l1 de papillomavirus humano tipo 11 |
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WO2020112720A1 (en) * | 2018-11-28 | 2020-06-04 | The General Hospital Corporation | T cell-directed anti-cancer vaccines against commensal viruses |
WO2021013079A1 (zh) * | 2019-07-19 | 2021-01-28 | 神州细胞工程有限公司 | 嵌合的人乳头瘤病毒56型l1蛋白 |
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