AU1158797A - Improved formulation for administration of steroid compounds - Google Patents

Description

Improved Formulation for Administration of Steroid Compounds

Field ofthe Invention

The present invention relates to improved formulations for the administration of certain steroid and steroid related compounds, which renders them more effective and which also facilitates parenteral administration of these compounds

Background of the Invention

Steroid compounds are powerful drug substances generally well known in biology, medicine and pharmaceutical sciences These compounds effect a number of important physiological functions in mammals and in human beings in particular

Many ofthe beneficial steroids that are administered therapeutically to patients are insoluble in water As a result, few of the active steroids can be administered in aqueous solution parenterally As a result of the insolubility of steroids in aqueous media many ofthe active steroids are administered in organic solvent vehicles particularly when administered topically and by injection If injected, steroids are usually administered using a needle into the muscle or intramuscularly (im) or into the layer below the skin or subcutaneously Steroids injected by both of these routes are absorbed gradually into the blood of the patient The resulting peak concentration of he drug in the blood is obtained only slowly and the therapeutic effect of the drug may be achieved only gradually and after some delay

Because of these problems in parenteral administration of steroids, these compounds are usually administered orally especially when chronic administration is required to exert a therapeutic effect Absorption ofthe compounds by the oral route however, is limited In most cases, if taken orally, less than 15 percent ofthe drug reaches the blood stream One reason for the low percentage of steroid reaching the blood stream is that much ofthe drug that is absorbed across the intestinal tract is shunted to the liver where it is deactivated before it can exert its therapeutic effect at the target organ which may be far removed from the liver

The limitations of steroid absorption by both the oral and parenteral routes have lead researchers to invent and develop new and more powerful versions of the naturally occurring steroids The resulting compounds exert their desired therapeutic effects at low concentration because they are more powerful than the naturally occurring steroids produced by the body However, coupled with these powerful therapeutic effects are frequently equally powerful side effects For example the anti-inflammatory corticosteroid prednisone is effective in reducing the symptoms associated with many auto-immune diseases such as ulcerative colitis, Chrone's disease and rheumatoid arthritis, but this powerful steroid also causes fluid retention and dramatic loss of bone or osteoporosis

Another result ofthe limitations of steroid administration is that naturally occurring steroids are not utilized effectively as therapeutics The use of naturally occurring steroids instead of the more powerful synthetic compounds is highly desirable because the naturally occurring steroids exert their beneficial effects with few if any side effects Unfortunately, such high levels of naturally occurring steroid administration are required to obtain therapeutic benefit that the cost of such naturally occurring steroid products becomes prohibitive Thus, the possibility of using naturally occurring steroids administered parenterally as therapeutic agents has been limited heretofore

Formulations have been proposed in the past to improve the availability of water-insoluble compounds in dosage forms that may be administered parenterally, either intravenously, intra peritoneally, intrathecally or intramuscularly Of these routes, the first three are the most desirable since the highest concentration of the compound is achieved in the shortest time

Liposomes, small envelopes of fat-like compounds containing an aqueous chamber or chambers within, have been proposed for the parenteral administration of a number of water- insoluble compounds The water insoluble compound is dissolved in the fat-like compound comprising the envelope of the liposome Liposomes, however, have the disadvantage of being preferentially removed from the circulation and retained in the liver and spleen Therefore, unless it is proposed to target the water-insoluble therapeutic compound to these organs, liposomes are not desirable Liposomes also have a number of other disadvantages, including instability when stored for long and short periods of time Change in the size of the liposome on storage is also a major problem

Another approach as has been to form a reversible complex between the insoluble drug, such as a steroid, and a carrier molecule The characteristics ofthe carrier molecule are such that the carrier molecule and the reversible complex are soluble in water Among these known carrier molecules are cyclodextrin compounds

A variety of improvements in the characteristics of pharmaceutical complexes including various cyclodextrins and cyclodextrin derivatives are disclosed in the following United States patents Noda et al , 4,024,223 methyl salicylate, Szejtli et al 4,228, 160 indomethacin, Hyashi et al , 4,232,009 ω-halo-PGI₂ analogs, Matsumoto et al , 4,351,846 3-hydroxy and 3-oxo prostaglandin analogs, Yamahira et al , 4,353,793, bencyclane fumarate, Lipari, 4,383,992 steroids-corticosteroids, androgens, anabolic steroids, estrogens, progestagens complexed with β cyclodextrin, but not substituted amorphous β cyclodextrins, Nicolau, 4,407,795 P- hexadecylaminobenzoic acid sodium salt, Tuttle, 4,424,209 3,4-diisobutyryloxy-N-{ 3-(4- isobuttyryloxyphenyl)-l-methyl-n-propyl]-β-phenethylamine, Tuttle, 4,425,336, 3,4- dihydroxy-N-[3-(4-hydroxyphenyl)- l-methyl-n-propyl]-β-phenethylamine, Wagu et al , 4,438, 106 fatty acids EPA and DHA, Masuda et al , 4,474,881 2-(2-fluoro-4- biphenyI)propionic acid or salt, Shinoda et al , 4,478,995 acid addition salt of (2'- benzyloxycarbonyl)phenyl trans-4-guanidinomehtylcyclo-hexanecaboxylate, Hyashi et al , 4,479,944 Prostaglandin 1₂ analog, Hayashi et al , 4,479,966, 6,9-methano-prostaglandin I _: analogs, Harada et al , 4,497,803 lankacidin-group antibiotic, Masuda 4,499,085 prostoglandin analog, Szejtli et al , 4,524,068 piperonyl butoxide, Jones, 4,555,504 cardiac glycoside, Uekama et al , 4,565,807 pirprofen, Ueda et al , 4,575,548 2-nitroxymethyl-6- chloropyridine, Ohwaki et al., 4,598,070 tripamide anti-hypertensive, Chiesi et al , 4,603, 123 piroxicam (feldene), Hasegawa et al , 4,608,366 monobenzoxamine, Hiari et al , 4,659,696 polypeptide, Szejtili et al , 4,623, 641 Prostoglandin I₂ methyl ester, Ninger et al , 4,663,316 unsaturated phosphorous containing antibiotics including phosphotrienin, Fukazawa et al , 4,675,395 hinokitol, Shimizu et al , 4,728,509 3-amino-7-isopropyl-5- oxo-5H-[I ]-benzopyrano[2,3-b]pyridine-3-carboxcylic acid, Shibani et al , 4,728,510 milk component; and Karl et al , 4,75 1,095 aspartame

Among the above-mentioned patents, several indicate that complexes of cyclodextrin with drug substances improve side effects of the drug substance Szejtli et al , 4,228, 160 disclosed that the frequency and severity of gastric and duodenal erosion and ulceration in rats caused by indomethecin is improved in an oral formulation of a complex of β- cyclodextrin indomethacin in a 2 1 ratio, but is not improved and in fact worsens in the same oral formulation of a complex of β-cyclodextrin indomethacin in a 1 1 ratio

Shimazu et al , 4,352,793 discloses that a formulation wherein bencyclane fumarate an anti- convulsive compound and β-cyclodextrin or γ-cyclodextrin yields a complex in which the bencyclane fumarate is an inclusion compound These complexes, when formulated as a liquid suitable for oral administration were claimed to be less irritating in an isotonic buffered pH 7 solution when administered as drops to the eyes of rabbits, as compared to bencyclane fumarate drops at the same drug concentration Shimazu et al , also discloses that similar complexes dissolved in rabbit blood in vitro yielded reduced hemolysis as compared to equal concentrations of bencyclane fumarate alone mixed with rabbit blood

Masuda et al , U S Patent No 4,478,81 1 disclose ophthalmic formulations of β- or γ- cyclodextrin complexes of the nonsteroidal anti-inflammatory compound fluoro-bi- phenylacetic acid which are less irritating and painful than the same formulations of fluoro-bi- phenyl acetic acid alone

Ueka a et al , 4,565,807 discloses complexes of -, β- and γ- cyclodextrin , piprofen and a pharmaceutically acceptable base Piprofen is an analgesic and anti-inflammatory compound which is bitter and can cause irritation to the gastrointestinal tract The complexes disclosed in the patent have improved less bitter taste and are less gastrointestinal irritating than the un-complexed compound piprofen No preparations suitable for intravenous injection were disclosed

Lipari, 4,383,992 discloses topical and ophthalmic solutions comprising a number of different steroid-related compounds including corticosteroids, androgens, anabolic steroids, estrogens, and progestagens complexed with β cyclodextrin None of the cyclodextrin compounds disclosed by Lipari are substituted or amorphous cyclodextrins In addition, none or the steroid related compounds disclosed by Lipari are 5β steroids

Pitha et al , U S Patent No 4,596,795 discloses complexes containing amorphous hydroxypropyl-β-cyclodextrin and sex hormones, particulariy testosterone, progesterone and estradiol as a lyophilized powder in tablet form These tableted complexes are disclosed as appropriate for administration sublingualiy or bacilli with absoφtion occurring across the corresponding mucosal membrane None is administered in solution parenterally In addition, none of the steroid related compounds disclosed by Pitha et al are 5β steroids.

Pitha et al , U S Patent No 4,727,064 discloses complexes containing water soluble amorphous substituted cyclodextrin mixtures and drugs with substantially low water solubility which may be lyophilized and the lyophilized powder formed into dosage forms suitable for absorption trans-mucocele across the oral, buccal or rectal mucosa The solutions of amoφhous water soluble cyclodextrin alone and not in a complex with a drug substance are disclosed as nonirritating topically, and having low toxicity, both systemic and local, when applied parenterally These solutions of substituted cyclodextrin alone were tested and shown to be non-lethal when substantial amounts ofthe cyclodextrin solution were administered intra peritoneally in mice There was no disclosure indicating whether the solutions cause elevated temperature in test subjects This phenomenon called the pyrogenic effect is highly objectionable in parenteral dosage forms A number of categories of drugs are disclosed in Pitha et al 067 for complex with cyclodextrin derivatives and include inter alia vitamins, salts of retinoid acid, spironolactone, antiviral agents, diuretics, anticoagulants, anticonvulsant and anti-inflammatory agents Significantly, Pitha et al ^* 067 while disclosing that aqueous solutions of 50% cyclodextrin may be used for the purpose of determining solubility of drugs in such solutions does not indicate that such solutions are suitable for intravenous administration No attempt is made to qualify the solution as to its pyrogenicity The claimed compositions of matter in the reference contain only cyclodextrin and drug Liquid or semi-liquid compositions of matter, which are claimed in the reference, appear to be made of cyclodextrins with higher degrees of substitution with hydroxy propyl groups These cyclodextrins are themselves semi-solid or liquids according to the reference Thus no aqueous formulations of water, cyclodextrin and drug are disclosed or claimed as suitable for parenteral administration in the reference

Bekers, O , et al , "Stabilization of mitomycins on complex with cyclodextrins in aqueous acidic media" International Journal of Pharmaceutics, 53, 239-248 (1989) describes the investigation of stabilization of mytomycin-C and several related mitomycins by formation of a complex with cyclodextrin The authors indicate that at the pH ranges studied - and β- cyclodextrin as well as heptakis-(2,6,-di-(7-methyl)-β- cyclodextrin and dimethyl-β- cyclodextrin, have no influence on stabilization of mitomycin-C pH degradation γ- cyclodextrin is reported as having measurable stabilizing effect on mitomycin in acidic media at pH above 1

Bodor, US patent 5,024,998 and Bodor, US patent 4,983,586 disclose a series of compositions comprising complexes of hydroxypropyl-β-cyclodextrin (HPCD) complexed to a difficult to solubilize drug, or HPCD complexed to a drug which has first been complexed to a specific class of drug carriers characterized as redox drug carriers The complex of drug and redox carrier is itself difficult to solubilize and is highly lipophilic due to the presence of pyridine derivatives as part ofthe redox carrier complex Bodor '998 and '586 further claim that a solution of 20 to 50% hydroxypropyl-β-cyclodextrin and lipophilic drug-redox carrier complex, or 20 to 50% hydroxypropyl-β-cyclodextrin and lipophilic and/or water labile drug is useful in a method of "decreasing the incidence of precipitation of a lipophilic and/or water labile drug occurring at or near the injection site and/or in the lungs or other organs following parenteral administration "

Significantly the Bodor references attribute the precipitation and organ deposition problems associated with parenteral administration of lipophilic drugs to the effects of organic solvents used to solubilized the drug in the parenteral vehicle The Bodor references additionally state that drugs which are particularly useful in the parenteral composition and methods disclosed therein are those which are relatively insoluble in water but whose water solubility can be substantially improved by formulation with 20 to 50% ofthe selected cyclodextrin, e.g , HPCD, in water Significantly no part of Bodor addresses the pyrogenic load on the cyclodextrin or the issue of the pyrogenic effect of the composition when injected parenterally Thus it is quite clear that the Bodor references are directed to prevention of the phenomenon of precipitation of insoluble drugs and insoluble drug-carrier complexes

There are a number of disclosures relating to the 5 β steroids used in the formulations disclosed herein below according to the invention Yen et al , Lipids, 12, 409 ( 1977) disclosed that dehydroepiandrosterone DHEA ( a 5 α steroid) administered by a variety of routes decreased the rate of weight gain in a strain of genetically obese mice DHEA treatment markedly reduced the development of diabetes in both genetically obese and diabetic mice and maximal benefit was observed when DHEA was ingested according to Coleman et al , Diabetes, 31 80 ( 1982) Coleman et al , Endocrinology, 1 15, 239 ( 1984) showed that α ET and β ET reduce blood sugar, increased plasma insulin concentrations and provided a protective effect on the pancreas as demonstrated by increased granulation of islet β cells Moreover, ET and β ET but not androsterone or epiandrosterone, were four times more effective than DHEA in preventing development of diabetes in C57BL/KsJ-db/db diabetic mice Coleman et al , U S Patent No 4,518,595 showed that oral administration of DHEA restored hyperglycemia to normal levels and improved glucose tolerance even in severely diabetic mammals In U.S Patent No 4, 507,289 Coleman taught the use of ET and β ET and an estrogen for the treatment of diabetes, obesity syndromes and associated hypercorticoidism

Coleman, Endocrinology, 1 17, 2279 ( 1985) disclosed that α ET and β ET when supplied in the diet have anti-obesity properties, and can prevent and arrest the development of obesity, and facilitate weight reduction after obesity in diabetic genetically obese mice U S Patent No 4,666,898 to Coleman and Applezweig disclosed the use of Etiocholanolones in the treatment of obesity, diabetes and other symptoms of hypercorticoidism B Zumoff ft al., Obesity Research, 2, 13 ( 1994) disclosed that ED orally administered at a dose of four grams per day yielded significant fat loss in human obese subjects In a 20 week randomized double-blind cross over study, 14 subjects lost significantly more weight and body fat during treatment with oral ED than during placebo administration Mean weight loss during ED administration was 2 8 ± 5 5 kilograms which was equivalent to 0.5 ± 0 91 kilograms per week per 100 kilograms of body fat Densitometric measurement of body fat content showed that the mean weight loss coincided almost exactly with the mean decrease in body fat content Over the 10-week period of ED administration, the mean fat loss was about 5% of the initial body fat content There were no significant subjective or objective side effects of ED administration In all of the foregoing references, the 5 β steroids or DHEA is administered orally with or without food

U S Patent 5,006,517 to Bradlow, et al , discloses that Prader-Willi Syndrome a congenital disease caused by a chromosomal defect may be treated by administering etiocholanolone or etiocholanolondione to individuals suffering from the syndrome resulting in either weight loss or a decrease in the rate of weight gain in the treated individuals

Gardner and Juneja, Brit J He at , 65,295-300 (1987) treated aplastic anemia patients with either α- and/or β ET in an uncontrolled pilot study Of 43 treated patients, 17 had hematologic responses lasting longer than six months including normalization of hemoglobin level for long periods of time which persisted after α-ET was discontinued Kappas et al , J Clin Endocr , 16, 284 (1956), Kappas et al , Trans Assn Am Phys , 72,54 ( 1959) showed that α-ET engendered acute pyrogenic reactions in man when administered by intramuscular injection This observation lead Gardner and Juneja to concomitantly administer prednisolone along with the intramuscular therapeutic injections of α-ET to prevent development of fever and to alleviate local irritation at the injection sites The α-ET and β-ET as described below, were administered in a sterile polypropylene vehicle by im route because the 5β steroids are notoriously insoluble in aqueous solutions and therefore cannot be administered by intravenous route

Gardner and Juneja also observed that three patients who did not respond to a ET had a hematologic recovery when treated with β-ET Significantly, β-ET evidenced little pyrogenic effect and minimal prednisolone doses of 10 mg were sufficient to suppress any local irritation

The metabolism and elimination routes of the 5 β steroids have been investigated by several groups Administration of α ET and β ET by parenteral routes resulted in the recovery of almost exclusively α ET conjugates in the urine. Kappas et al , J Clin Endocr , 16, 284 ( 1956) In addition Zumoff et al , have shown that β ET or ED when administered to a patient is quickly converted almost exclusively to α ET in the serum of normal and obese subjects (unpublished data) Bradlow et al , J Clin Endocr 27, 1203-1207 ( 1967) found that based on isotopic ratio studies, the C3 position of a portion of α ET administered IV to human subjects was rapidly oxidized and re-reduced

Appelzweig et al , U S Patent No 4,871,726 disclosed methods and compositions for inducing increased blood levels of α-ET in the body of a mammal by administration of ED, showing that both α ET and β ET administered either orally or parenterally are rapidly oxidized at the C-3 position to form etiocholandione (ED) Furthermore they disclose that ED can serve as a source of circulating blood levels of free ET, By administering ED, high levels of ET can be achieved in the serum In effect ED can serve as a prodrug for α ET according to Appelzweig et al

While several ofthe 5 β steroids are known to be active in control of obesity and associated diabetic and/or hyper cortical syndrome, the compounds are effective for treatment of these conditions when they are administered orally By the oral route, the absorption of the 5β steroids is only 5 to 15% as measured by blood levels using various assays Thus a large portion of the administered drug is never absorbed into the blood stream and the greatest part ofthe drug that is administered is eliminated in the feces

To achieve high serum concentrations of a drug, it is more efficient to administer drugs parenterally, preferably by the intravenous (iv) route However, it has been observed that the

5β steroids do not appear to exert any of their anti-obesity, anti-diabetic or anti-hypercortical activities when administered intramuscularly (im). Furthermore the im route of administration engenders pyrogenic reactions with some of the 5β steroids as described above in Kappas et al. Thus, it would be desirable to have a formulation that would allow parenteral administration of the 5 β steroids, preferably by the intravenous (iv) route and which would preserve the anti-obesity, anti-diabetic and anti-hypercortical activities of these compounds.

A further long-felt need in the administration of these 5 β steroid drugs is to obtain a high serum concentration of the drug without resorting to the intramuscular (im) route of administration which causes local irritation and, at least in the case of α-ET pyrogenic reaction and notable patient discomfort Furthermore, in that the evidence of Gardner and Juneja implies that pyrogenic reaction associated with im administration is not required to obtain the hematologic activity of the 5 β steroids, especially β-ET, it would be desirable to obtain a formulation ofthe 5β steroids compatible with aqueous iv solutions to maximize the serum concentration of the 5 β steroids Considerable saving in the cost of active drug substance for a given response could be achieved thereby.

In addition to the advantages of higher serum concentration of drug and drug precursors afforded by a practical aqueous-compatible formulation of α ET and ED respectively, it would be of considerable advantage to provide an aqueous compatible formulation of the drug and prodrug which further includes an amount of β ET which would be clinically effective especially in anemia patients who respond hematologically to β ET but who do not respond to α ET

The steroid dehydroepiandrosterone (3-β-hydroxy-androst-5-en-17-one, DHEA) and its sulfate derivatives are major steroid adrenal secretory products in humans DHEA is metabolized to testosterone (17-β-hydroxy-androst-4-en-3-one) and estradiol (estra-1, 3,5 ( 10)-triene-3, 17-diol), two major sex hormones in humans. Other metabolites of DHEA include α ET and β-ET They were considered to be inert metabolic end products which were merely conjugated as glucuronides or sulfates and excreted into the urine, α ET is a major metabolite of DHEA, and in normal individuals, is excreted in the urine in amounts of about 3-5 mg per day, whereas β ET is a minor metabolite in man

DHEA has been shown to be effective in controlling diabetes and obesity in rats and mice by Coleman, however in human usage for a number of different inflammatory conditions including the treatment ol^' Lupus Erythematosus, DHEA has demonstrated a number of undesirable side effects In particular, in female patients, who are the most frequent sufferers of lupus erythematosus, DHEA causes severe acne and may also cause masculinizing effects, particularly hirsutism, the production of facial and body hair

One of the advantages that may be obtained through the present invention is to reduce the amount of DHEA administered to a patient when administered in an iv formulation The administration of DHEA by the iv route is advantageous in itself in that the circulating concentrations ofthe drug can be precisely monitored If orally administered, the amount of DHEA absorbed through the alimentary tract and reaching the blood stream may vary substantially depending upon the amount if food and liquid the subject has consumed Furthermore since many inflammatory processes including Chrone's disease and ulcerative colitis affect the intestines and bowel, the absoφtion of a drug from this area ofthe body may vary considerably if orally administered Thus, iv administration may be particularly important for DHEA

In particular it is believed that some of the salutary effects of DHEA, particularly those relating to inflammatory and autoimmune processes may be preserved while the side effects are eliminated if reduced amounts of DHEA are administered by the parenteral route, especially the iv route In addition, it is believed that the salutary effects of DHEA on inflammatory and autoimune disease, diabetes and obesity may by preserved even at low concentrations if DHEA is co-administered with one or more of the 5 β steroids parenterally The parenteral administration of DHEA with one or more of the 5 β steroids is facilitated in the formulation according to the invention

Summary and Objects ofthe Invention It is an object ofthe invention to provide improved formulations ofthe 5 β steroids suitable for parenteral administration

It is a further object of the invention to provide improved formulations of the 5 β steroids wherein the formulation is a sterile aqueous solution suitable for parenteral administration

It is yet a further object ofthe invention to provide improved formulations of the 5 β steroids wherein the formulation is a sterile aqueous solution suitable for parenteral administration and is not pyrogenic

It is a still further object ofthe invention to provide improved formulations ofthe 5 β steroids wherein the formulation is non-pyrogenic and contains one or more of the 5 β steroids

It is yet still a further object of the invention to provide improved formulations of the 5 β steroids wherein the formulation is non- pyrogenic and contains one or more of the 5 β steroids and DHEA

Another object of the invention is to provide methods for treating a subject for a condition which responds to treatment with the 5 β steroids by administering to the subject an improved formulation ofthe 5 β steroids suitable for parenteral administration Among these conditions may be obesity, diabetes syndrome, diabetes-associated hypercorticoidism or combinations thereof, anemic disorders including but not limited to aplastic anemia and anemia associated with renal failure or chemotherapy-induced or radiation-induced anemia or neutropenia, autoimmune or inflammatory disorders such as lupus erythematosus

It is a further object ofthe invention to provide a method for treating a subject for a condition which responds to treatment with DHEA using a reduced amount of DHEA by administering to the subject at least one 5 β steroid and a reduced amount of DHEA Among these conditions are those listed above

Yet a still further object ofthe invention is to provide a method for treating a subject for a condition which responds to treatment with DHEA using a reduced amount of DHEA by administering to the subject at least one 5 β steroid and a reduced amount of DHEA in a formulation including an amorphous cyclodextrin wherein the formulation is suitable for parenteral administration Among these conditions are those listed above

Another object ofthe invention is to provide a method of treating a subject for a condition which responds to treatment with the 5 β steroids by administering to the subject an improved formulation ofthe 5 β steroids suitable for parenteral administration which is non- pyrogenic Among these conditions are those listed above

Detailed Description ofthe Invention

By 5 β steroid is meant α ET, β ET, and ED In addition certain alkylated derivatives of these 5 β steroids are also included in this definition For example 16- alkylated 5β androstan-3-ol-17-one and 16-alkylated 5 β androstan-3, 7-diol-17-one which are disclosed in U S Patent 4,602,008, herein incorporated by reference, have been shown to be biologically effective as anti-diabetic, anti-obesity and erythropoietic agents in mammals These compounds may be esterified at the 3 or 7 positions of the steroid ring structure by conventional means Also included in the definition is 5-β-androstane -3, 17-diol or etiocholandiol ( herein after Ediol ) α ET, β ET, Ediol and ED are all commercially available compounds (Research Plus Inc, POB 324 Bayonne, New Jersey 07002 USA)

In addition other diols ofthe 17 keto 5-β steroids are commercially available and may be used in the invention and may be esterified at the carbon at which the -OH moiety is attached Thus, for example 5β- androstan-3α, 1 lα-diol-17-one, 5β- androstan-3β, 1 l β-diol-17-one, and 5β- androstan-3α, 1 lβ-diol-17-one, 5β-androstane-l l α-ol-3, 17-dione, 5β-androstane -l l β-ol-3, 17-dione, 5β-androstane -3α, 16α-diol-17-one are commercially available (Research Plus Inc, POB 324 Bayonne, New Jersey 07002 USA) and may be esterified at the 1 1 or 16 positions, as the case may be, by conventional means to produce the organic acid derivative of the 5β steroids

By cyclodextrin is meant α-, β-, or γ- cyclodextrin Cyclodextrins are described in detail in Pitha et al , U S Patent 4,727,064 which is incorporated herein by reference Cyclodextrins are cyclic oligomers of glucose, these compounds form inclusion complexes with any drug whose molecule can fit into the lipophile-seeking cavities ofthe cyclodextrin molecule

By amoφhous cyclodextrin is meant non-crystalline mixtures of cyclodextrins wherein the mixture is prepared from α-, β-, or γ- cyclodextrin In general the amorphous cyclodextrin is prepared by non-selective additions, especially alkylation of the desired cyclodextrin species Reactions are carried out to yield mixtures containing a plurality of components thereby preventing crystallization of the cyclodextrin various alkylated and hydroxyalkyl-cyclodextrins can be made and of course will vary, depending upon the starting species of cyclodextrin and the addition agent used Among the amorphous cyclodextrins suitable for compositions according to the invention are hydroxypropyl, hydroxyethyl, glucosyl, maltosyl and maltotriosyl derivatives of β-cyclodextrin, carboxyamidomethyl-β- cyclodextrin, carboxymethyl-β-cyclodextrin, hydroxypropyl-β-cyclodextrin and diethyiamino-β-cyclodextrin In the compositions according to the invention hydroxy-β- cyclodextrin is preferred The substituted γ- cyclodextrins may also be suitable, including hydroxypropyl, hydroxyethyl, glucosyl, maltosyl and maltotriosyl derivatives of γ- cyclodextrin

The cyclodextrin of the compositions according to the invention may be α-, β-, or γ- cyclodextrin α-cyclodextrin contains six glucopyranose units, β-cyclodextrin contains seven glucopyranose units, and γ-cyclodextrin contains eight glucopyranose units The molecule is believed to form a truncated cone having a core opening of 4 7-5 3 A, 6 0-6 5

A and 7 5-8 3 A in α-, β-, or γ- cyclodextrin respectively The composition according to the invention may comprise a mixture of two or more of the α-, β-, c r γ- cyclodextrins Usually, however the composition according to the invention will com jrise only one ofthe α-, β-, or γ- cyclodextrins The particular α-, β-, or γ- cyclodextrir to be used with the particular 5β steroid compound to form the compositions according to the invention may be selected based on the known size of the molecule of the 5β steroid compound and the relative size of the cavity of the cyclodextrin compound Generally if the molecule of the 5β steroid compound is relatively large, a cyclodextrin having a larger cavity is used to make the composition according to the invention Furthermore, if the 5β steroid compound is administered with an excipient it may be desirable to use a cyclodextrin compound having a larger cavity in the composition according to the invention

The unmodified α-, β-, or γ- cyclodextrins are less preferred in the compositions according to the invention because the unmodified forms tend to crystallize and are relatively less soluble in aqueous solutions More preferred for the compositions according to the invention are the α-, β-, and γ- cyclodextrins that are chemically modified or substituted Chemical substitution at the 2,3 and 6 hydroxyl groups of the glucopyranose units of the cyclodextrin rings yields increases in solubility of the cyclodextrin compound

Most preferred cyclodextrins in the compositions according to the invention are amorphous cyclodextrin compounds By amorphous cyclodextrin is meant non-crystalline mixtures of cyclodextrins wherein the mixture is prepared from α-, β-, or γ- cyclodextrin In general, the amorphous cyclodextrin is prepared by non-selective alkylation of the desired cyclodextrin species Suitable alkylation agents for this purpose include but are not limited to propylene oxide, glycidol, iodoacetamide, chloroacetate, and 2- diethylaminoethlychloride Reactions are carried out to yield mixtures containing a plurality of components thereby preventing crystallization of the cyclodextrin various alkylated cyclodextrins can be made and of course will vary, depending upon the starting species of cyclodextrin and the alkylating agent used Among the amorphous cyclodextrins suitable for compositions according to the invention are hydroxypropyl, hydroxyethyl, glucosyl, maltosyl and maltotriosyl derivatives of β-cyclodextrin, carboxyamidomethyl-β-cyclodextrin, carboxymethyl-β-cyclodextrin, hydroxypropyl-β-cyclodextrin and diethylamino-β- cyclodextrin In the compositions according to the invention hydroxypropyl-β-cyclodextrin is preferred although the - or γ- analogs may also be suitable The particular alkylated -, β-, or γ- cyclodextrin to be used with the particular 5 β steroid compound to form the compositions according to the invention will be selected based on the size ofthe molecule ofthe 5β steroid compound and the relative size ofthe cavity of the cyclodextrin compound

As with the unsubstituted cyclodextrins mentioned above, it may be advantageous to use alkylated cyclodextrin having a larger cavity when the composition according to the invention also includes an excipient The use of a particular α-, β-, or γ- cyclodextrin with a particular 5β steroid compound or 5β steroid compound and excipient in the compositions according to the invention may of course be optimized based on the effectiveness in of maintaining the 5 β steroid or mixture there of with or without DHEA in solution

As mentioned above, the compositions of matter of the invention comprise an aqueous preparation of preferably substituted amorphous cyclodextrin and one or more 5β steroids The relative amounts of 5β steroid compound and cyclodextrin will vary depending upon the relative amount of each o the 5β steroid compounds and the effect o the cyclodextrin on the compound In general, the ratio of the weight of 5 β steroid compound to the weight of cyclodextrin compound will be in a range between 1 1 and 1 5000 Within this range, the circulating availability ofthe 5β steroid will be significantly increased when the ratio of the weight of 5 β steroid to the weight of cyclodextrin compound is in a range between the concentration at which the 5β steroid will not go into solution at the particular amorphous cyclodextrin concentration and 1 2000 A weight to weight ratio in a range of 1 5 to 1 .200 and more preferably in a range of 1 5 to 1 50 oϊ 5β steroid compound to cyclodextrin are believed to be the most effective for increased circulating availability of the 5β steroid For example, ED in a ratio of between 1 10 and 1 300 (drug amorphous cyclodextrin, wt wt), and a final concentration of the injection solution of 40 mg/ml of ED is expected to significantly increase circulating concentration of ED as compared to intramuscularly injected ED in a polypropylene vehicle

Thus α ET, β ET, ED, Ediol or DHEA each individually or in a mixture of two or more may be added to the cyclodextrin solution to form a complex of each compound individually or in a mixture of two or more of these compounds

Importantly, if the aqueous solution comprising the DHEA and /or 5 β steroid and amorphous cyclodextrin is to be administered parenterally, especially via the iv route, the amorphous cyclodextrin will be substantially free of pyrogenic contaminants Amorphous hydroxypropyl-β-cyclodextrin maybe purchased from a number of vendors including Amaizo, Inc (Hammond Indiana, USA) under the tradename Encapsin In addition, other forms of amoφhous cyclodextrin having different degrees of substitution or glucose residue number are available commercially A method for the production of hydroxypropyl-β- cyclodextrin is disclosed in Pitha et d/ , U S Patent No 4, 727,064 which is incorporated herein by reference

To produce the formulations according to the invention, a pre-weighed amount of hydroxypropyl-β-cyclodextrin compound, which is substantially pyrogen free is placed in a suitable depyrogenated sterile container Methods for depyrogenation of containers and closure components are well known to those skilled in the art and are fully described in the United States Pharmacopeia 23 (United States Pharmacopeial Convention, Rockville, Maryland USA) Generally, depyrogenation is accomplished by exposing the objects to be depyrogenated to temperatures above 400°C for a period of time sufficient to fully incinerate any organic matter As measured in U S P Bacterial Endotoxin Units, the formulation will contain no more than 10 Bacterial Endotoxin Units per gram of amorphous cyclodextrin By substantially pyrogen free is meant that the hydroxypropyl-β-cyclodextrin contains less than 10 U S P bacterial endotoxin units per gram using the U S P method Preferably, the hydroxypropyl-β-cyclodextrin will contain between 0 1 and 5 U S P bacterial endotoxin units per mg, under conditions specified in the United States Pharmacopeia 23

Sufficient sterile water for injection is added to the substantially pyrogen free amorphous cyclodextrin until the desired concentration of hydroxypropyl-β-cyclodextrin is in solution To this solution a pre-weighed amount of the 5 β steroid is added with agitation and with additional standing if necessary until it dissolves The solution is then filtered through a sterile 0 2 micron filter into a sterile holding vessel and is subsequently filled in sterile depyrogenated vials and is capped For products that will be stored for long periods of time, a pharmaceutically acceptable preservative may be added to the solution of 5β steroid and hydroxypropyl-β-cyclodextrin prior to filtration, filling and capping or alternatively, may be added sterilely after filtration

In the formulations according to the invention, DHEA alone or together with one or more ofthe 5 β steroids may be used In particular the formulation including DHEA and ED or DHEA and αET and βET or DHEA, ED, αET and βET are desirable This is particularly desirable in relation to obesity control and inflammatory disease control It is clear that DHEA is metabolically transformed into the primary male and female sex steroid hormones, testosterone and estradiol respectively, and is ultimately metabolized to α ET and β ET By reducing the amount of DHEA to an amount which contributes in only a small way to the production of the sex steroids testosterone and estradiol, while at the same time maximizing the amount of α ET and βET circulating in the blood from the initial dose administered to a subject, it is believed that enhancement ofthe desirable obesity control, hematopoiesis, and anti-inflammatory effects may be achieved while, at the same time, the dermatologic and virilizing side effects of DHEA are minimized to an acceptable degree, if not eliminated

The invention will be better understood from the following examples which are intended to he merely illustrative of the invention and are not intended to be limiting Examples Example I 12 milligrams (mg) of Etiocholandione (Steraloids, Inc New Hampshire) was stirred and shaken with 0.5 ml of water in a test tube Appreciable quantities of compound remained out of solution after 5 minutes accumulating as white crystals at the bottom ofthe test tube

A 50% solution of hydroxypropyl-β-cyclodextrin was prepared as follows 5 grams of pyrogen free hydroxypropyl-β-cyclodextrin (sold under the trade name Encapsin, Amaizo,

Inc., Hammond, Indiana, USA) was weighed on an analytical scale and placed in a graduated cylinder Water was added with shaking until the volume reached 10 ml

0 5 ml ofthe 50% solution of hydroxypropyl-β-cyclodextrin was added to the 0 5 ml of water containing 12 mg of Etiocholandione with additional shaking A clear solution was obtained Thus, 12 mg ED was effectively solubilized in 1 ml of 25% solution of hydroxypropyl-β- cyclodextrin

Example II

The previous experiment was repeated using a 50% solution of hydroxypropyl-β-cyclodextrin prepared as in Example 1 50 mg of Etiocholandione was weighed and placed in a test tube 2 ml ofthe 50% solution of hydroxypropyl-β-cyclodextrin was added to the test tube with shaking Within one minute, the Etiocholandione dissolved, leaving a clear solution with no accumulation of crystals Thus, 25 mg was effectively solubilized in 1 ml of 50% solution of hydroxypropyl-β-cyclodextrin

Example III

4 grams of hydroxypropyl-β-cyclodextrin was dissolved in 7 ml of distilled water to a total volume of 10 ml Each ml of stock solution contained 0 4 g of solution hydroxypropyl-β- cyclodextrin 20 mg of 3-β-hydroxy androstan-17-one (β-etiocholanolone) was shaken with

1 ml of the freshly prepared stock solution. Partial dissolution took place immediately and after sitting at room temperature with occasional shaking for 6 hours complete dissolution took place

Example IV

The same experiment as in example III was performed except that 40 mg of β- etiocholanolone was added to the stock solution of hydroxypropyl-β-cyclodextrin After standing for 24 hr, a complete dissolution had occurred Example V

The same experiment as in example III was performed except that 20 mg of Etiocholandione was added to the stock solution of hydroxypropyl-β-cyclodextrin Complete dissolution occurred within 6 hours

Example VI

The same experiment as in example V was performed except that 40 mg of Etiocholandione was added to the stock solution of hydroxypropyl-β-cyclodextrin Complete dissolution occurred within 24 hours

Example VII

The same experiment as in Example V was performed except 80 g or 250mg ED was added to the stock solution In neither case did the ED completely dissolve

Example VII

The optical density (OD) of the ET and ED dissolved in hydroxypropyl-β-cyclodextrin solutions was determined at 400 NM against a blank control containing water and set at an OD of 0.0 The dissolved solutions of ET and ED had OD readings of 0.12 whereas the hydroxypropyl-β-cyclodextrin solution containing 80mg of ED gave an OD of 1 2 at 499 NM

Example VIII

To make a formulation containing α ET and ED, the stock solution of hydroxypropyl-β- cyclodextrin in prepared as in Example III 20 mg of α ET and 20 mg of ED will be added to 1 ml of the solution with agitation An aqueous solution containing 40 mg of the two 5 β steriods and no precipitate is present after standing for 24 hours

Example IX

To make a formulation containing β ET and ED, the stock solution of hydroxypropyl-β- cyclodextrin in prepared as in Example III 20 mg of β ET and 20 g of ED is added to 1 ml of the solution with agitation An aqueous solution containing 40 mg of the two 5 β steriods and no precipitate is present after standing for 24 hours

Example X

To make a formulation containing α ET, β ET and ED, the stock solution of hydroxypropyl- β-cyclodextrin is prepared as in Example III 15 mg of α ET, 15 mg β ET and 15 mg of ED will be added to 1 ml ofthe solution with agitation A clear aqueous solution containing 45 mg ofthe three 5 β steriods and no precipitate will be present after standing for 24 hours

Example XI

To make a formulation containing α ET, β ET and ED, the stock solution of hydroxypropyl- β-cyclodextrin is prepared as in Example III 10 mg of α ET, 10 mg β ET, 1 mg of ED and 15 mg of DHEA will be added to 1 ml of the solution with agitation A clear aqueous solution containing 45 mg of the DHEA and the three 5 β steriods and no precipitate is present after standing for 24 hours

The composition of mattei according to the invention may be supplied as a dry powder or as a solution If the composition of matter is to be injected into a subject it will be rendered sterile prior to injection Accordingly, the composition of matter according to the invention may be supplied as a sterile cake, plug or powder or as a sterile lyophilized preparation in a sterile vial suitable for the addition of a sterile diluent, or as a sterile liquid solution in a sterile container

The compositions of matter according to the invention may by supplied as a powder comprising the active pharmaceutical 5 β steroid compound or compounds and amorphous cyclodextrin compound If the composition is to be administered parenterally, for example iv, the composition of matter will be rendered sterile prior to such administration Any of the several known means for rendering such pharmaceutical preparations sterile may be used so long as the active pharmaceutical compound is not inactivated and the complex with the amorphous cyclodextrin is not degraded If the active pharmaceutical compound is heat stable, the composition of matter according to the invention may be heat sterilized If the cytotoxic compound is not heat-stable but is not photo degraded the composition may be sterilized by exposure to ultraviolet light or by ionizing radiation Alternatively, the composition of matter if in a powder form may be gas sterilized using for example ethylene oxide gas In another alternative, the composition of matter according to the invention may be filter-sterilized using a 0 2 micron filter If the composition of matter is an aqueous liquid, it may be filled in a sterile container and supplied as a sterile liquid ready for further dilution or injection neat Alternatively such sterile liquids may be freeze-dried or lyophilized in a sterile container and capped

In general the compositions of matter according to the invention will be made by dissolving the cyclodextrin in water and adding the β steroid compound to the aqueous cyclodextrin solution Excipients, if any are desired. may be added with or subsequent to adding the 5β steroid compound The resulting solution may be sterilized using any of the known methods appropriate to preserving the compound without significant degradation

Preferably the solution will be sterile filtered, although other means such as terminal heat sterilization or irradiation may be employed as is known in the art, provided that the cyclodextrin compound is not significantly degraded Alternatively, the components may be sterilized by any of the known methods appropriate to preserving the compound prior to mixing in water and may be mixed using sterile equipment and technique The solution may be lyophilized in sterile containers and capped Prior to use the lyophilized composition of matter may be reconstituted using sterile water for injection

The container closure system used for containing the formulation according to the invention will also be treated to remove or destroy pyrogenic substances by means known in the art prior to filling and further processing Thus the preferred compositions of matter according to the invention for parenteral administration, especially by the intravenous route will be non- pyrogenic Nonpyrogenic preparations according to the invention, when administered to a subject, does not cause a febrile (basal body temperature raising) reaction Although some bacterial endotoxin may be present, the amount is insufficient to elicit a febrile reaction In general, such non-pyrogenic compositions will contain less than 10 S P bacterial endotoxin units per gram of product

The formulation according to the invention may be supplied as a dry lyophilized powder as mentioned above or as a sterile non pyrogenic aqueous solution in a sterile container closure system such as a stoppered vial suitable for puncturing with a sterile syringe and needle

Alternatively the formulation according to the invention may be supplied as a sterile non pyrogenic aqueous solution in a sterile syringe or syringe and needle As a sterile solution or powder it may also include a pharmaceutically acceptable preservative The formulation according to the invention may also be included in other dosage forms in addition to those appropriate for parenteral administration Preferably, such other dosage forms will include one or more of the 5 β steroids with or without DHEA Such dosage forms may be in the form of aqueous suspensions, elixirs, or syrups suitable for oral administration, or compounded as a cream or ointment in a pharmaceutically acceptable topical base allowing the 5 β steroid compounds with or without DHEA to be absorbed across the skin In addition the formulation according to the invention may be compounded in a lozenge or suppository suitable for trans mucosal absorption The formulations according to the invention having been described herein may influence the ordinarily skilled artesian to make similai formulations using components that will be known in the art, without departing from the invention which is claimed herein

Claims (1)

1. We Claim

   1 A composition of matter comprising at least one 5 β steroid and an amorphous cyclodextrin

   2 The composition of claim 1 wherein said 5 β steroid is selected from the group consisting of α etiocholanolone, β etiocholanolone and etiocholandione

   3 The composition of claim 1 comprising etiocholandione and β etiocholanolone

   4 The composition of claim 1 comprising etiocholandione and α etiocholanolone.

   5 The composition of claim 1 comprising etiocholandione, α etiocholanolone and β etiocholanolone

   6 A composition wherein the any ofthe forgoing compositions is a sterile aqueous solution suitable for parenteral administration

   7 The composition of claim 6 wherein the composition is sterile and is contained within a sterile container

   8 The composition of claim 7 wherein the composition is non-pyrogenic when administered intravenously

   9 The composition of claim 8 wherein said composition contains no more than 10 endotoxin units per gram

   10 The composition wherein in any of the forgoing compositions said amorphous cyclodextrin has a degree of substitution of 2 to 7

   2 1 1 The composition wherein any of the forgoing compositions further includes DHEA

   12 A composition of any of the forgoing claims suitable for treating a condition selected from the group consisting of obesity, diabetes syndrome, diabetes-associated hypercorticoidism, combinations thereof, and anemic disorders wherein the 5 β steroid or 5 β steroids together is an obesity-, diabetes-, hypercorticoidism- or anemia- antagonistic amount