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AU2008258216A1 - Pharmaceutical composition comprising arsenite for the treatment of malignancy - Google Patents

Pharmaceutical composition comprising arsenite for the treatment of malignancy Download PDF

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Publication number
AU2008258216A1
AU2008258216A1 AU2008258216A AU2008258216A AU2008258216A1 AU 2008258216 A1 AU2008258216 A1 AU 2008258216A1 AU 2008258216 A AU2008258216 A AU 2008258216A AU 2008258216 A AU2008258216 A AU 2008258216A AU 2008258216 A1 AU2008258216 A1 AU 2008258216A1
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AU
Australia
Prior art keywords
tumour
pharmaceutical composition
salt
arsenite
treatment
Prior art date
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Abandoned
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AU2008258216A
Inventor
Sang Bong Lee
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to AU2008258216A priority Critical patent/AU2008258216A1/en
Publication of AU2008258216A1 publication Critical patent/AU2008258216A1/en
Abandoned legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K33/00Medicinal preparations containing inorganic active ingredients
    • A61K33/24Heavy metals; Compounds thereof
    • A61K33/36Arsenic; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Chemistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Epidemiology (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicinal Preparation (AREA)

Description

P/00/01Il Regulation 3.2 AuSTRALIA Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Invention Title: Pharmaceutical composition comprising arsenite for the treatment of malignancy The following statement is a full description of this invention, including the best method of performing it known to me: 1A PHARMACEUTICAL COMPOSITION COMPRISING ARSENITE FOR THE TREATMENT OF MALIGNANCY The present invention relates to a pharmaceutical composition containing arsenic for the treatment of a malig nancy. Pharmaceutical compositions containing arsenic are 5 known for cancer therapy. For example, the review by Waxman S. et al (The Oncologist 6(suppl. 2), pp. 3-10 (2001)) de scribes arsenic disulfide, arsenic trisulfide and arsenic trioxide the use of said composition comprising a salt of meta-arsenite (AsO 2 ) and a pharmaceutically acceptable auxil 10 iary. Due to their inherent toxicity, and the advent of good alternatives, interest in arsenic compounds has remained low. The object of the present invention is to provide a 15 pharmaceutical composition suitable for use in cancer ther apy, which allows for the treatment of solid tumours. The pharmaceutical composition may be used for treatment of such solid tumours for which currently no treatment exists, or as an alternative or supplementary treatment.for such solid tu 20 mours. To this end, the pharmaceutical composition accord ing to the present invention is characterized in that it is a pharmaceutical composition for the treatment of a solid ma lignancy chosen from the group consisting of colon tumour, 25 gastric tumour, mammary tumour, ovarian tumour, prostate tu mour, and renal tumour, said composition comprising a salt of meta-arsenite (AsO2) and a pharmaceutically acceptable auxil iary. It has been found that the specified types of tumour 30 are surprisingly sensitive to the meta-arsenite salt. In the salt the counter-ion of meta-aresenite may be any pharmaceu tically acceptable counter-ion. In the article by Waxman, mention is made of an ar ticle by Tarnowski G.S. et al (Cancer Research, 26(2), pp. 35 181-206 (1966)) where 8 tumour types were investigated with 2 14 different anti-tumour chemicals. Potassium arsenite af fected only the growth of Ehrlich ascites tumour. Regarding this tumour type it is remarked that it is more sensitive in the ascites than in the sold form. This emphasizes the sur 5 prising finding of the present invention. According to a preferred embodiment, the salt is an alkaline or earth alkaline metal salt. According to a more preferred embodiment, the alkaline metal salt is a potassium or sodium salt. 10 Such salts are readily soluble and are readily available for exerting their anti-tumour effect. The invention also relates to the use of a salt of meta-arsenite (AsO 2 ~) for the manufacture of a pharmaceutical composition for the treatment of a solid malignancy chosen 15 from the group consisting of colon tumour, gastric tumour, mammary tumour, ovarian tumour, prostate tumour, and renal tumour. It was found that solid malignancy belonging to the group consisting of colon tumour, mammary tumour, prostate 20 tumour, and renal tumour were particularly sensitive. Finally, the present invention relates to a method of treating a human individual suffering from a solid malignancy chosen from the group consisting of colon tumour, gastric tu mour, mammary tumour, ovarian tumour, prostate tumour, and 25 renal tumour, with a pharmaceutically effective dose of a salt of meta-arsenite (AsO 2 ~). The present invention will now be elucidated with reference to the following non-limiting example. 30 EXAMPLE Various human tumor cells were grown at 37*C in a humidified atmosphere (95% air, 5% CO 2 ) in monolayer cultures in RPMI 1640 medium with phenol red (Life Technologies, Karlsruhe, Germany) supplemented with 10% fetal calf serum. 35 Cells were trypsinized and maintained weekly. Cytotoxicity assay A modified propidium iodide assay (based on W.A.
3 Dengler et. al, Anti-Cancer Drugs, 6, pp. 522-532 (1995)) was used to examine the antiproliferative activity of the study compounds. Briefly, cells will be harvested from exponential phase cultures growing in RPMI 1640 medium supplemented with 5 10% fetal calf serum by trypsination, counted and plated in 96 well flat-bottomed microtiter plates (140 l cell suspension, 8 x 104 cells/ml). After a 24h recovery, to allow cells to re sume exponential growth, 10 pl culture medium (6 control wells per plate) or culture medium containing the test drug were 10 added to the wells. Each drug concentration was plated in triplicate. After 4 days of incubation culture medium was re placed by an aqueous propidium iodide solution (6 g/ml). Mi crotiter plates were kept at -18 0 C for 24 h, resulting in a total cell kill. After thawing of the plates, fluorescence was 15 measured using a Millipore Cytofluor 2350-microplate reader (excitation 530 nm, emission 620 nm) in order to quantify the total cell number. The assay included untreated and positive controls (5-FU and vindesine). Growth inhibition is expressed as Treated/Control x 20 100 (or T/C%) . IC 5 o and IC7o values were determined by plotting compound concentration versus cell number. Mean IC 50 and IC 70 values were calculated according to the formula: n 25 Z log (IC 5 o,-o)x x=1 Mean IC 5 0 ,70 = 10" 30 With x = specific tumor cell line and n = total num ber of cell lines studied. If ICso or IC 7 o could not be deter mined within the examined dose range, the lowest or highest concentration studied was used for the calculation. Assays were considered valid only if the positive 35 control (5-FU) induced a tumor growth inhibition of T/C <30% and if vehicle treated control cells had a fluorescence in tensity >500 units. Results 40 The results have been summarized in Table I, which 4 shows that in particular tumour cell lines of the type gas tric tumour, ovarian tumour, and in particular prostate tu mour, mammary tumour, renal and colon tumour were sensitive to the meta-arsenite compound. In comparison, promyelocytic 5 leukaemia, which is known to respond to arsenic trioxide, showed an IC 7 o value of 6.82 g/ml. Hence, the tumour cells to which the present invention relates are about 2 to 20 times more sensitive to the meta-arsenite compound according to the present invention. 10 TABLE I Tumour cell line IC7o (pg/ml) Colon DLD1 0.48 Gastric GXF251L 3.08 Mammary MXAF401NL 0.32 Ovarian OVCAR3 3.02 Prostate PC3 0.85 Renal RXF486L 0.63

Claims (6)

1. Pharmaceutical composition for the treatment of a solid malignancy chosen from the group consisting of colon tumour, gastric tumour, mammary tumour, ovarian tumour, pros 5 tate tumour, and renal tumour, said composition comprising a salt of meta-arsenite (AsO2) and a pharmaceutically accept able auxiliary.
2. Pharmaceutical composition according to claim 1, characterized in that the salt is an alkaline or earth alka 10 line metal salt.
3. Pharmaceutical composition according to claim 2, characterized in that the alkaline metal salt is a potassium or sodium salt.
4. Use of a salt of meta-arsenite (AsO2~) for the 15 manufacture of a pharmaceutical composition for the treatment of a solid malignancy chosen from the group consisting of co lon tumour, gastric tumour, mammary tumour, ovarian tumour, prostate tumour, and renal tumour.
5. Use according to claim 4, characterized in that 20 solid malignancy is chosen from the group consisting of colon tumour, mammary tumour, prostate tumour, and renal tumour.
6. Method of treating a human individual suffering from a solid malignancy chosen from the group consisting of colon tumour, gastric tumour, mammary tumour, ovarian tumour, 25 prostate tumour, and renal tumour, with a pharmaceutically effective dose of a salt of meta-arsenite (AsO2~).
AU2008258216A 2008-12-18 2008-12-18 Pharmaceutical composition comprising arsenite for the treatment of malignancy Abandoned AU2008258216A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008258216A AU2008258216A1 (en) 2008-12-18 2008-12-18 Pharmaceutical composition comprising arsenite for the treatment of malignancy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2008258216A AU2008258216A1 (en) 2008-12-18 2008-12-18 Pharmaceutical composition comprising arsenite for the treatment of malignancy

Publications (1)

Publication Number Publication Date
AU2008258216A1 true AU2008258216A1 (en) 2010-07-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
AU2008258216A Abandoned AU2008258216A1 (en) 2008-12-18 2008-12-18 Pharmaceutical composition comprising arsenite for the treatment of malignancy

Country Status (1)

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AU (1) AU2008258216A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120251628A1 (en) * 2011-03-30 2012-10-04 Young Joo Min Compositions and methods for treatment of cancer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120251628A1 (en) * 2011-03-30 2012-10-04 Young Joo Min Compositions and methods for treatment of cancer

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MK4 Application lapsed section 142(2)(d) - no continuation fee paid for the application