Treatment of tumor metastases and cancer

Abstract

Tumor metastases in cancer patients are inhibited by administration of a combination therapy including effective amounts of Interleukin-2 and a methylol transfer agent such as taurolidine, taurultam or mixtures thereof.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the field of treating tumor metastases and cancer.

2. Description of the Background Art

Interleukin-2 (IL-2) is an agent which has been suggested for inhibiting tumor cell growth. However, administration of IL-2 to patients presents severe toxicity problems, since IL-2 elicits an extremely strong systemic inflammatory response syndrome (SIRS) reaction in patients. Toxicity of IL-2 is so severe that approximately 70% of patients cannot tolerate treatment.

Additionally, a common problem in patients undergoing cancer treatment is tumor recurrence or metastasis.

Thus, despite the advances in cancer treatment, there remains a significant need in the art for new and improved cancer treatment therapies.

SUMMARY OF THE INVENTION

In accordance with the present invention, tumor metastasis is inhibited in a cancer patient by administering to said patient a combination therapy comprising effective amounts of IL-2 and a methylol transfer agent.

DETAILED DESCRIPTION OF THE INVENTION

It has surprisingly been found that methylol transfer agents such as taurolidine and taurultam reduce or substantially eliminate the severe toxicity and side effects of IL-2 in a combination therapy for inhibiting tumor metastases and treating cancer in patients, while it has unexpectedly been found that the efficacy of IL-2 is actually enhanced by the methylol transfer agents in the combination therapy of the present invention.

IL-2 when used in accordance with the present invention includes natural or recombinant Interleukin-2, or biologically active derivatives or substantial equivalents thereof.

Methylol transfer agents include methylol-containing compounds such as taurolidine and taurultam. The compounds taurolidine and taurultam are disclosed in U.S. Pat. No. 5,210,083. Other suitable methylol-containing compounds may be found among those identified in PCT Publication No. WO 01/39763. Particularly preferred methylol transfer agents for utilization in accordance with the present invention are taurolidine, taurultam, biologically active derivatives thereof and mixtures thereof.

Particularly preferred embodiments involve treatment of cancers selected from the group consisting of malignant melanoma and renal cancer, and inhibition of tumor metastases thereof. For example, the combination therapy of the present invention has been found to be particularly effective in inhibiting metastatic malignant melanoma and metastatic renal cell carcinoma.

Other cancers to which the combination therapy of the present invention is effective may include other carcinomas, sarcomas or lymphomas. Cancers to which the present invention may be applicable include glioma, neuroblastoma, astrocytoma, carcinomatous meningitis, breast cancer, ovarian cancer, colon cancer, prostate cancer, pancreatic cancer, central nervous system (CNS) cancer, liver cancer, lung cancer, gastric cancer, esophageal cancer, urinary bladder cancer, leukemia, lymphoma, melanoma, renal cell cancer and metastases thereof.

Effective daily dosage amounts of IL-2 may comprise pharmaceutical dosage units within the range of 1,000,000,000 units (U) IL-2 per m2 body surface area. Dosage amounts of IL-2 also may be found within the range of 100,000-1,000,000 U per kilogram body weight. Dosage amounts of IL-2 further may be found within the range of 0.1-100 micrograms IL-2 per kilogram body weight.

Effective dosage amounts of a methylol transfer agent in accordance with the present invention may comprise pharmaceutical dosage units within the range of about 0.1-1,000 mg/kg. Preferred dosages may be in the range of about 10-20 grams taurolidine, taurultam or a mixture thereof, per administration.

Pharmaceutical dosage units of the combined therapy of the present invention may be administered by any suitable route, which include oral, topical or peritoneal administration, e.g., subcutaneously, intraperitoneally, intramuscularly, or intravenously, e.g., by infusion or injection.

In preferred embodiments, 250 ml of taurolidine 2% solution is administered by intravenous infusion about 1-6 times per day, more preferably about 2-4 times per day, during a treatment period, concurrently with administration of about 10,000,000-40,000,000 units m2 IL-2 by intravenous infusion per day during the treatment period.

The present invention also is directed to a combination of IL-2 and a methylol transfer agent, in effective amounts for simultaneous, separate or sequential use for inhibiting tumor metastasis in a cancer patient. The invention also is directed to pharmaceutical combinations including pharmaceutical dosage units comprising effective amounts of Interleukin-2 and a methylol transfer agent for inhibiting tumor metastasis in a cancer patient, as well as to pharmaceutical compositions comprising such combinations.

The invention is further illustrated by the following non-limiting examples.

EXAMPLE 1

A 63 year old patient diagnosed with metastatic malignant melanoma was treated as follows.

• • Presentation Right supra-clavicular mass. Originally had nodular melanoma excised from right elbow, and had high-dose interferon post-operatively. Required axillary clearance for a mass in right axilla eight months later. Further staging was clear at that time. Presented one year later with a fixed inoperable mass in right supra-clavicular area.
  • Treatment IL-2 and Taurolidine
  • Regimen Interleukin-2
    • Day 1: 18 million units/m² IL-2 infusion over 6 hours
    • Day 2: 18 million units/m² IL-2 infusion over 12 hours
    • Day 3: 18 million units/m² IL-2 infusion over 24 hours
    • Days 4-7: 18 million units/m² IL-2 infusion over 78 hours
    • Taurolidine
    • Taurolidine 2% 250 ml infusion over twelve hours, daily during IL-2 administration
    • Completed five courses of the above

After one year, the patient is alive and well, with no evidence of disease on imaging.

EXAMPLE 2

A 50 year old patient diagnosed with metastatic renal cell carcinoma was treated as follows.

• • Presentation Haemoptysis—2° to pulmonary metastases. Noted to have hepatic metastases, in addition to a large mass in the left kidney.
  • Treatment IL-2 and Taurolidine
  • Regimen Interleukin-2
    • Day 1: 18 million units/m² IL-2 infusion over 6 hours
    • Day 2: 18 million units/m² IL-2 infusion over 12 hours
    • Day 3: 18 million units/m² IL-2 infusion over 24 hours
    • Days 4-7: 18 million units/m² IL-2 infusion over 78 hours
    • Taurolidine
    • Taurolidine 2% 250 ml infusion over two hours, twice daily during IL-2 administration
    • Completed five courses of the above Further treatment Left radical nephrectomy

After five years, the patient is alive and well, with no evidence of disease on imaging.

EXAMPLE 3

A male patient who had recurrent nodular melanoma after interferon treatment was subsequently treated with Interleukin-2 and Taurolidine as follows:

• • Presentation Recurrence of nodular melanoma lesion in right shoulder.
  • Treatment IL-2 and Taurolidine
  • Regimen Interleukin-2
    • Day 1: 36 million units/m2 IL-2 infusion over 6 hours
    • Day 2: 36 million units/m2 IL-2 infusion over 12 hours
    • Day 3: 36 million units/m2 IL-2 infusion over 24 hours
    • Days 4-7: 36 million units/m2 IL-2 infusion over 78 hours
    • Taurolidine
    • Taurolidine 2% 250 ml infusion over twelve hours, sequentially with IL-2 administration, during days 1-6
    • Undertook five courses—during second course, treatment was interrupted and stopped at 78 hours, and during the fifth course, treatment was interrupted during day 4.

Follow-up CT scans indicated a reduction in the size of the lesion, and subsequently indicated no evidence of disease.

Claims

1. A method of reducing toxicity of IL-2 and reducing side effects of IL-2 in a cancer patient in need of IL-2 administration, comprising administering a tumor-inhibiting amount of IL-2 to said cancer patient during a treatment period, wherein said IL-2 administration is capable of causing said toxicity and said side effects in said cancer patient, and further comprising administering to said patient an IL-2 toxicity-reducing and side effects-reducing amount of taurolidine, taurultam, or a combination thereof, during said treatment period, so as to reduce said toxicity and said side effects of said IL-2 in said cancer patient.

2. The method of claim 1 wherein said taurolidine, taurultam or combination thereof is administered to said patient in an amount within a range of about 0.1-1000 mg/kg patient body weight.

3. The method of claim 1 wherein said taurolidine is administered in an amount of about 10-20 mg.

4. The method of claim 1 wherein IL-2 is administered in an amount of about 1 million-100 million U IL-2/m2 body surface area of said patient.

5. The method of claim 1 wherein said IL-2 is administered in an amount of about 100,000-1 million U/kg body weight of said patient.

6. The method of claim 1 wherein said IL-2 is administered in an amount of about 0.1-100 micrograms IL-2/kg body weight of said patient.

7. The method of claim 1 wherein said IL-2 is administered in an amount of 10 million-40 million U IL-2/m2 body surface area of said patient.

8. The method of claim 1 wherein said IL-2 is administered to said patient in an amount of about 18 million U/m2 body surface area of said patient per day, and said taurolidine is administered to said patient in an amount of about 250 ml 2% by weight taurolidine solution per day.

9. The method of claim 1 wherein said IL-2 is administered to said patient in an amount of about 18 million U/m2 body surface area of said patient per day, and said taurolidine is administered to said patient in an amount of about 250 ml 2% by weight taurolidine solution twice daily.

10. The method of claim 1 wherein said IL-2 is administered to said patient in an amount of about 36 million U/m2 body surface area of said patient per day, and said taurolidine is administered to said patient in an amount of about 250 ml 2% by weight taurolidine solution daily.