Title of Invention	A PHARMACEUTICAL FORMULATION COMPRISING AN ALPHA-HALOGENOACRYLOYL DISTAMYCIN DERIVATIVE
Abstract	A pharmaceutical formulation comprising An a-halogenoacryloyl distamycin derivative The present invention relates to a pharmaceutical formulation comprising an a-halogenoacryloyl distamycin derivative of formula (I) Wherein is a bromine or chlorine atom; and is a distamycin or distamycin-like framework; or a pharmaceutically acceptable salt thereof; and a pharmaceutically acceptable excipients.

Full Text

USE OF SUBSTITUTED ACRYLOYL DISTAMYCIN DERIVATFVES IN THE TREATMENT OF TUMORS ASSOCUTED WITH HIGH LEVELS OF GLUTATHIONE. The present invention relates to the use of substituted aryloxyl histaminic derivatives, in particular to the use of a-bromo- and a-chloroacryloyl histaminic derivatives, in the treatment of tumors associated with high levels of glutathione and/or glutathione-S-transferees family. More specifically, the present invention concerns the treatment of a human being diagnosed with a tumor over expressing glutathione/giutathione-S-transferases family, hereinafter solely referred to as GSH/GSTs, with the above acryloyl distamycin derivatives GSH plays a crucial protective role against cellular injury produced by a number of toxic insults. Preclinical and clinical studies have established a correlation between GSH/GSTs over expression and cancer or cancer response-rate to chemotherapy. Alterations of the GSH-based detoxification system (consisting of GSH and GSH related enzymes, GSTs) have been also associated with varying responsiveness to several antineoplasia agents. Both GSH and GSTs are ubiquitously present in several human tissues such as, for instance, blood cells, plasma, serum, circulating blasts and pathologic (tumor) tissues. See, for a general reference to GSH and GSTs, Cancer Rees, 54: 4313-4320 (1994); BriL J. Cancer 72(2): 324-326 {\995)\DDT 3:U3A2l (1998). GSTs, and most prominently GST-TC, are present at high levels in a preponderance of tumor types. Increased activity of GSH/GSTs in comparison to normal tissues has been found in several tumor tissues comprising, for instance, gastrointestinal tumors (including esophageal, gastric, colon, hepatocellular and pancreatic), uterine and ovarian cancers, head and neck cancer, lung and NSCL carcinomas as well as met static liver tumors originating from the colon, stomach and bladder [Cancer Res. 49:5225-5229 (1989); Clinical Revamps in Biochemistry and Molecular Biology 27(4.5):337-386 (1992)]. To establish the role of GSH/GSTs towards inactivity and/or resistance of tumor cells to cytotoxic drugs, two major experimental approaches have been followed. The first of them involved studies in which elevated levels or expression and activity of GSH/GSTs were correlated with increased levels of drug resistance. This approach also included modulation of GSH/GSTs activity by means of GSH inhibitors such as BSO (buthionine sulphoximine), in order to circumvent or reverse drug resistance. The second approach, used in transfixion studies, provided direct functional evidence that GSH/GSTs caused drug resistance. Evidence exists that GSH/GSTs play a major role in resistance to alkylating agents (e.g. melphalan, chlorambucil, cyclophosphamide, ifosfamide mustards. BCNU) and platinum complexes such as capsulation, carbolated and oxaliplatin [Biochem. Pharmacology 35: 3405-3409 (1986)]. Recently, the role of GSH in dmg resistance has been linked to the regulation of the activity of the multi-drug resistance-associated proteins (IVIRP) which confer resistance to different cytotoxics including anthracyclines (e.g. doxorubicin, idarubicin, epirubicin and donatives thereof), epidophyllotoxins (e.g. etoposide and teniposide), Vince alkaloids (e.g. vinblastine and vincrisdne) and tisanes (e.g. paclitaxel and docetaxel) [Eur. J. Cancer 32 945-957 (1996); Semmarsin Oncol. 24(5):580-591, (1997)]. It has now been found that, unlike other well known cytotoxic distamycin derivatives, those bearing an a-bromo- or a-chloroacryloyl moiety, as set forth below according to the object of the present invention, are surprisingly effective in the treatment of tumors over expressing GSH/GSTs system, hence known to be poorly responsive to conventional ant tumor therapies and/or to cause resistance once therapeutic cytotoxic agents are administered. Distamycin A and analogs thereof, hereinafter referred to as distamycin and distamycin-like derivatives, are known in the art as cytotoxic agents useful in antitumor therapy. Distamycin A is an antibiotic substance with antiviral and antiprotozoal activity, having a polypyrrole framework [Nature 203: 1064 (1964); J. Med Chem. 32: 774-778 (1989)]. The international patent applications WO 90/11277, WO 98/04524, WO 98/21202, WO 99/50265, WO 99/50266 as well as the co-pending still unpublished International patent application No. PCT/EPOO/11714 (filed on 23.11.2000 and claiming priority from British patent application 9928703.9), all in the name of the applicant itself and herewith incorporated by reference, disclose acryloyl distamycin derivatives wherein the amidino moiety of distamycin is optionally replaced by nitrogen-containing ending groups such as, for instance, Cyanamid no, N-methy amidino, guanidine, carbamoyl, amidoxime, cyano and the like, and/or wherein the polypyrrole framework of distamycin, or part of it, is replaced by varying carbocyclic or heterocyclic moieties. Therefore, a first object of the present invention is the use of a a-halogenoacryloyl distamycin derivative of formula (I) wherein; R] is a bromine or chlorine atom; R2 is a distamycin or distamycin-like framework; or a pharmaceutically acceptable salt thereof; in the manufacture of a medicament for the treatment of tumors over expressing GSH/GSTs system. According to a preferred embodiment of the invention, the above compounds of formula (1) are surfeit for treating tumors over expressing GSH/GSTs system and comprising gastrointestinal tumors, including esophageal, gastric, colon, hepatocellular and pancreatic tumor, uterine and ovarian cancers, head and neck cancer, lung and NSCL carcinomas as well as metastasis liver tumors originating from the gastrointestinal, uterine, ovarian and lung cancers. A further embodiment of the invention is the use of the compounds of formula (I) in the treatment of tumors which over express GSH/GSTs system as a result of a previous chemotherapy treatment, for example a first-line chemotherapy treatment with alkylating agents, platinum derivatives or anthracyclines. More specifically, the previous chemotherapy treatment may comprise alkylating agents, for ' instance melphalan, chlorambucil, cyclophosphamide, ifosfamide mustards and BCNU, platinum complexes, for instance isolation, carbolated and oxaliplatin; anthracyclines, for instance doxorubicin, iambic, epirubicin and derivatives thereof; epidophyllotoxins, for instance etoposide and teniposide; Vince alkaloids, for instance vinblastine and vincristine; taxies, for instance paclitaxel and docetaxel. The present invention includes within its scope the use of all the possible isomers covered by the compounds of formula (1), both considered separately or in admixture, as well as the metabolites and the pharmaceutically acceptable bio-precursors (otherwise known as pro-drugs) of the compounds of formula (I) Within the compounds of formula (I), unless otherwise specified, with the term distamycin or distamycin-like framework R2 we intend any moiety structurally closely related to distamycin itself, for instance by replacing the ending amidino moiety of distamycin and/or its polypyrroie framework, or part of it. A preferred embodiment of the invention provides the use of the compounds of formula (1), as above indicated, wherein R\ has the above reported meanings and R> is a group of formula (II) below: wherein m is an integer from 0 to 2; n is an integer from 2 to 5; risk or 1; X and Y are, the same or different and independently for each heterocyclic ring, a nitrogen atom or a CH group; treatment of tumors associated with high levels of GSH/GSTs and find application in the treatment of several tumors which are scarcely responsive or even not susceptible to conventional chemotherapeutic agents. The role of GSH on the cytotoxic activity of the compounds of formula (I) has been investigated by testing the compounds on a chemoresistant tumor cell sublime presenting levels of GSH/GSTs higher than those of the parental cell line. The used model is a melphalan (L-PANQ resistant moraine leukemia (L1210/L-PAM) which presents a three fold increased amount of GSH (25.8 amole/lO' cells) with respect to the normal L1210 (7.7 nmole/10^ cells) cell line (Table 1). The tested compounds of formula (1) are: N-(5-{[(5-{[(5-{[(2-{[amino(imino)methyl]amino}ethyl)amino]carbonyPrl-methyI-lH- pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)amino]carbonyl 1 -1 -methyl-1H- pyrrol-3 -yl)-4-[(2-bromoacryloyl)amino]-1 -methyl-1 H-pyrrole-2-carboxamide hydrochloride - internal code PNU 166196; and N-(5-{ [(5-{ [(5-{ [(3-amino-3-iminopropyl)amino]carbonyl }-l -methyl-1 H-pyrrol-3- yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3 - yl)-4-[(2-bromoacryloyl)amino]-l-methyl-lH-pyrrole-2-carboxamide hydrochloride - internal code PNL' 151807. The distamycin derivative 3-[l-methyl-4-[l-methyl-4-[l-methyl-4-[l-methyl-4-[N,N-bis(2- chloroethyl) amino] benzenecarboxamido] pyrrole-2-carboxamido]pyrrole-2-carboxamido] pyrrole-2-carboxamido] propionamidine, better known as tallimustine, and L-Pam were tested as controls in the same experimental conditions. Data, reported in Table I, clearly indicate that the cytotoxic of the compounds of formula (I) was increased on L1210/L-PAM cells by three fold in respect to L1210 cells (PNU 166196 = IC50O.49 and 1.62 ng/ml, respectively; PNU 151807 - IC50 0.26 and 0.86 ng/ml, respectively). The cytotoxicity of tallimustine was comparable on the two cell lines; conversely the cytotoxicity of L-PAM was lower on L1210/L-PAM cells than on L1210 cells. formula (I), as the active substance, in association with one or more pharmaceutically acceptable excipients and are usually prepared following conventional methods. For instance, solutions for intravenous injection or incision may contain sterile water as a carrier or, preferably, they may be in the form of sterile aqueous isotonic saline solutions Suspensions or solutions for intramuscularly injections may contain, together with the active compound, a pharmaceutically acceptable carrier, e.g. sterile water, olive oil ethyl oleate, glycols, e.g. propylene glycol and, if desired, a suitable amount of lidocaine hydrochloride In the form for topical application, e.g. creams, lotions or pastes for use in dermatological treatment, the active ingredient may be mixed with conventional oleaginous or emulsifying excipients. The solid oral forms, e.g. tablets and capsules, may contain, together with the active compound, diluents, eg lactose, dextrose, saccharine, cellulose, com starch and potato starch; lubricants, e.g. silica, talc, stearic acid, magnesium or calcium stearate. and/or polyethylene glycols; binding agents, eg. starches, arabic gums, gelatin, methylcelluiose, carboxymethyl-cellulose, polyvinylpyrrolidone; disaggregating agents, eg a starch, alginic acid, alginates, sodium starch glycol ate, effervescing mixtures: dyestuffs, sweeteners; wetting agents, for instance, lecithin, colysorbate, ; and, in general, non-toxic and pharmacologically inactive substances used in pharmaceutical formulations. Said pharmaceutical preparations may be manufactured in a Kiowa mariner, for example by means of mixing, granulating, tabletting, sugar-coating, or film-coating processes. Furthermore, according to the present invention, there is provided a method of treating tumors over expressing GSH/GSTs system in a patient in need of it which comprises administering to the said patient a composition of the invention. The following examples are herewith intended to better illustrate the present invention without posing any limitation to it. Example 1 Cytotoxic activity of the compounds of formula^!) against tumors associated with high levels of GSH The compounds N-(5-{ [(5-{[{5-{[(2-i [amino(imino)methyl]amino}ethyl)amino] carbonyl} -1 -methyl-1 H-pyrrol-3-yl)amino]carbonyl} - I-methyl-1 H-pyrrol-3 -yl)amino] carbonyl }-l -methyl-lH-pyrroU3-yl)-4-[(2-bromoacryloyl)amino]-1 -methyl-1 H-pyrrole-2-carboxamide hydrochloride (PNIJ 166196) and N-(5-{[{5-{[(5-{[(3-amino-3-iniinopropyl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yI)amino]carbonyl} -1 -methyl-1H-pyrrol-3-yl)amino]carbonyl}-]-methyl-1 H-pyrrol-3-yl)-4-[(2-bromoacryloyl)amino]-l-methyl-lH-pyrrole-2-carboxamide hydrochloride (PNU 151807) , respectively prepared as described in WO 98/04254 and WO 90/11277, were dissolved in sterile water and immediately used for the experiments. The cytotoxic activity was determined on L1210 marine lymphocyte leukemia cell line and on the L-PAM resistant cell subline L1210/L-PAM Cells were grown in vitro as stabilized suspension cultures.L12I0 cells were maintained in RPMl 1640 medium containing 3-mercaptoethanol (logic). L1210/L-PAM cells were maintained in RPMI 1640 medium containing P-mercaptoethanol (50|iM). All culture media (Biowhittaker, UK) were supplemented with 10% Fetal Calf Seam (Biological Industries, Israel) and 2 mM L-glutamine (Biowhittaker, UK). The cytotoxic activity was determined against exponentially growing cells, L1210 and L1210/L-PAM cells were seeded in 24 well-plates at concentration of 50,000 cells/ml and immediately treated for 48 h with the drug. The inhibition of cell growth was evaluated by counting surviving cells with a Coulter Counter The antiproliferative activity of drugs was calculated from dose-response curves and expressed as IC50 (concentration inhibiting 50%i cell growth in treated cultures relative to untreated controls). All the experiments were carried out twice. Results are reported per the enclosed table I and comments thereof Example 2 Cytotoxicity and apoptotic effect of PNU 166196 on A2780 cells pretreated with BSO The compound PNU 166196 (see example 1 above) was dissolved in sterile water and immediately used for the experiments. BSO was dissolved in sterile water and filtered with a 0 2^1 filter The cytotoxic activity was detemnined on A2780 human ovarian carcinoma cell line Cells were grown in vitro as monolayers cultures in RPMl 1640 medium (Biowhittaker. UK) supplemented with 10% Fetal Calf Serum (Biological Industries, Israel) and 2 mM L-glutamine (Biowhittaker, UK). The cytotoxic activity was determined against exponentially growing cells. A2780 cells were seeded in 6 well-plates at concentration of 100,000 cells/ml for 2 ml and incubated for 24 h with the GSH inhibitor BSO and finally exposed to different concentrations of PNU 166196 (untreated cells were incubated with the medium only). After 24 h treatment with the drug, cell growth inhibition was evaluated on the monolayer cells whereas the floating cells were used for morphology evaluation Apoptosis was evaluated by fluorescence microscopy. At the end of the treatment, floating cells were collected, washed in PBS, fixed in 70% ice-cold ethanol and stored at -20'C until analysis (5 days max.). Cells were then continued and the pellets were stained with 50 ml presidium iodide, 0.001% Nonie P40 and 60 U/ml RNAseH and stored in the dark for 30 minutes at 37X. Cells were centrifuged and the pellets were resuspended in 50 PBS At least 600 cells randomly chosen 2 smears independently prepared were examined for their nuclear morphology changes (chromatin condensation aide DNA fragmentation) using a fluorescence microscope J. Cancer 65:491-497 (1996)] All the experiments were carried out twice. Results are reported per the enclosed table II and comments thereof 1. Use of an a-halogenoacryloyi histaminic derivative of formula (I) wherein: R] is a bromine or chlorine atom; and R2 is a histaminic or histaminic-like framework; or a pharmaceutically acceptable salt thereof; in the manufacture of a medicament for the treatment of tumors over expressible GSH/GSTs system 2. Use according to claim 1 wherein the tumor over expressing GSH/GSTs system is selected from gastrointestinal tumors, including esophageal, gastric, colon, hepatocellular and pancreatic tumor, uterine and ovarian cancers, head and neck cancer, lung and NSCL carcinomas and metastases liver tumors originating from the gastrointestinal, uterine, ovarian and lung cancers. 3. Use according to claim 1 wherein the over expression of GSM/GSTs system is the result of a previous first-line chemotherapy treatment with a cytotoxic agent 4. Use according to claim 3 wherein the cytotoxic agent is selected from alkylating agents, including Memphian, chlorambucil, cyclophosphamide, ifosfamide mustards and BCNU; platinum complexes, including cisplatin, carbolated and oxaliplatin; anthracyclines, including doxombicin, idarubicin, epirubicin and derivatives thereof; epidophyllotoxms. including etoposide and teniposide; evince alkaloids, including vinblastine and vincristine: and taxies, including paclitaxel and docetaxel. 5. Use according to claim 1 wherein, in the a-halogenoacryloyl histaminic derivative of formula (I), derivative of formula (I), R^ is bromine or chlorine; and R2 is a group of formula (11) . wherein r is 0, m is 0 or 1, n is 4 and B is as defined in claim 5. 7. Use according to claim 6 wherein, in the a-halogenoacryloyl histaminic derivative of formula (1), Ri is bromine or chlorine; R2 is a group of formula (II) as defined in claim 5 and wherein r is 0, m is 0 or 1, n is 4, X and Y are both CH groups and B is selected from; wherein R4 is cyano or hydroxy and R5, R^ and R7, the same or different, are hydrogen or Ci-Ca alkyl. 8, Use according to claim 1 wherein the a-halogenoacryloyl histaminic derivative of formula (I), optionally in the form of a pharmaceutically acceptable salt, is selected from: 1. N-(5-{[(5-{[(5-{[(2-{[amino(imino)methyl]amino}ethyl)amino]carbonyl}-l-methyl- 1 H-pyrrol-3-yl)amino]carbonyI} -1 -methyl-1 H-pyrrol-3-yl)amino]carbonyl} -1 - methyl-1 H-pyrrol-3-yl)-4-[(2-bromoacryloyi)amino]-1 -methyl-1 H-pyrrole-2- carboxamide; 2. N-(5-{[(5-{[(5-{[(2-{[amino(imino)methyl]amino}propyl)amino]carbonyl}-l- methyl-lH-pyrro]-3-yl)amino]carbonyl}-1-methyl-lH-pyrrol-3-yl)amino]carbonyl}- 1 -methyl-1 H-pyrrol-3-yl)-4-[(2-bromoacryloyl)amino]-1 -methyl-1 H-pyrrole-2- carboxamide; 3. N-(5-{[(5-{[(5-{[(3-amino-3-iminopropyl)amino]carbonyl}-l-methyl-lH-pyrrol-3- yI)amino]carbonyl}-l-methyl-lH-pyrrol-3-yl)amino]carbonyl}-l-methy-pyrrol- 3-y!)-4-[(2-bromoacryloyl)amino]-1 -methyl-1 H-pyrrole-2-carboxamide; 4. N-(5-{[(5-{[(5-{[(3-amino-3-iminopropyl)amino]carbonyl}-l"methyl-lH-pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrroI-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)-4-[(2-bromoacryloyl)amino]-l-methyl-lH-imidazole-2-carboxamicle; 5. N-(5-{[(5-{[(5-{[(3-amino-3-iminopropyl)amino]carbonyl}-l-methyl-lH-pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)-3-[(2-bromoacryloyl)amino]-l-methyl-lH-pyrazole-5-carboxamide; 6. N-(5-{[(5-{[(5-{[(3-amino-3-oxopropyl)amino]carbonyl}-l-methyl-lH-pyrrol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyiTol-3-yl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3-yl)-3-[(2-bromoacryloyl)amino]-l-methyl-lH-pyrazole-5-carboxamide, 7. N-(5-{[(5-{[(5-{[(2-{[amino(imino)methyl]amino}ethyl)amino]carbonyl}-1 -methy!-1 H-pyrrol-3-yl)amino]carbonyl}-1 -methyl-1 H-pyrrol-3-yi)amino]carbonyl}-1 -methyl-lH-pynro!-3-yl)-4-[(2-chloroacry]oily)amino]-l-methyl-lH-pyrrole-2-carboxamide; 8. N-(5-{[(5-{[(3-{[amino(imino)methyI]amino}propyl)amino]carbonyl}-l-methyl-1 H-pyrrol-3 -yI)amino]carbonyl} -1 -methyl-1 H-pyrrol-3 -yl)-4-[(2-bromoacryioyl)amino]-1 -methyl-1 H-pyrroie-2-carfaoxamide: 9. N-(5-{ [(5-{[(3-amino-3-iminopropyl)amino]carbonyl}-1 -methyl-1 H-pyrroI-3-yl)amino]carbonyl}-l-methyl-lH-pyrrol-3-yl)-4-[(2-bromoacryloyl)amino]-l-methyl-lH-pyrrole-2-carboxamide; and 10. N-{5-[({5-[({5-[({3-[(aminocarbonyl)amino]propyl}amino)carbonyI]-1 -methyl-1H- pyrrol-3 -yi} amino)carbonyl]-1 -methyl-1 H-pyrrol-3-yI} amino)carbonyl]-1 -methyl- lH-pyrrol-3-yl}-4-[(2-bromoacryloyI)amino]-l-methyl-lH-pyrrole-2-carboxamide. 9. Use according to claim 8 wherein the a'-halogenoacryloyl histaminic derivative of formula (I) is N-(5-{ [(5-{ [(5.{ [(2-{[amino(imino)methyI]amino} ethyl)amino]carbonyl} -1 -methyl-1 H-pyrrol-3 -y!)amino]carbonyl}-l-methyl-]H-pyrrol-3-yl)amino]carbonyl}-l-methyl-lH-pyrrol-3-yl)-4-[(2-bromoacryloyl)amino]-1 -methyl-1 H-pyrrole-2-carboxamide hydrochloride. 10. A method for the treatment of tumors over expressing GSH/GSTs system which comprises the administration of a compound according to claim 1 to a patient in need thereof. 11. A method according to claim 10 wherein the tumor over expressing GSH/GSTs system comprises gastrointestinal tumors, including esophageal, gastric, colon, hepatocellular and pancreatic tumor, uterine and ovarian cancers, head and neck cancer, lung and NSCL carcinomas and metastasis liver tumors originating from the gastrointestinal, uterine, ovarian and lung cancers. 12. Use of an a-halogenoacryloyl distancing derivative of formula L substantially as hereinabove described and exemplified.

Documents:

abs-in-pct-2002-1975-che.jpg

in-pct-2002-1975-che-abstract.pdf

in-pct-2002-1975-che-assignement.pdf

in-pct-2002-1975-che-claims filed.pdf

in-pct-2002-1975-che-claims grand.pdf

in-pct-2002-1975-che-correspondnece-others.pdf

in-pct-2002-1975-che-correspondnece-po.pdf

in-pct-2002-1975-che-description(complete) filed.pdf

in-pct-2002-1975-che-description(complete) grand.pdf

in-pct-2002-1975-che-form 1.pdf

in-pct-2002-1975-che-form 18.pdf

in-pct-2002-1975-che-form 26.pdf

in-pct-2002-1975-che-form 3.pdf

in-pct-2002-1975-che-form 5.pdf

in-pct-2002-1975-che-form 6.pdf

in-pct-2002-1975-che-other documents.pdf

in-pct-2002-1975-che-pct.pdf