Gemcitabine Plus Paclitaxel Versus Carboplatin Plus Either Gemcitabine or Paclitaxel in Advanced Non-small-cell Lung Cancer: A Literature-based Meta-analysis

Novel anti-cancer drug COTI-2 synergizes with therapeutic agents and does not induce resistance or exhibit cross-resistance in human cancer cell lines

Emerging drug-resistance and drug-associated toxicities are two major factors limiting successful cancer therapy. Combinations of chemotherapeutic drugs have been used in the clinic to improve patient outcome. However, cancer cells can acquire resistance to drugs, alone or in combination. Resistant tumors can also exhibit cross-resistance to other chemotherapeutic agents, resulting in sub-optimal treatment and/or treatment failure. Therefore, developing novel oncology drugs that induce no or little acquired resistance and with a favorable safety profile is essential. We show here that combining COTI-2, a novel clinical stage agent, with multiple chemotherapeutic and targeted agents enhances the activity of these drugs in vitro and in vivo. Importantly, no overt toxicity was observed in the combination treatment groups in vivo. Furthermore, unlike the tested chemotherapeutic drugs, cancer cells did not develop resistance to COTI-2. Finally, some chemo-resistant tumor cell lines only showed mild cross-resistance to COTI-2 while most remained sensitive to it.

Gemcitabine and carboplatin in metastatic nonsmall cell lung cancer: Experience from a tertiary cancer center in South India

BACKGROUND

Gemcitabine and carboplatin combination is widely used as one of the first-line chemotherapeutic regimens in patients with metastatic nonsmall cell lung cancer patients.

METHODOLOGY

A total of 112 patients with metastatic disease were recruited. They were on standard 21-day gemcitabine 1.2 g/m2 and carboplatin AUC 5 dosing schedule. Each patient received at least four cycles and a maximum of 6 cycles of treatment. The patients were followed up, and the demographic, efficacy and toxicity profiles were analyzed.

RESULT

The mean age was 53.81±9.85 with 71 male and 41 female patients. Response assessment was done in 82 patients, and the objective response rate was found to be 47.6% with 39 partial responders, 20 patients with stable disease and 23 patients with progressive disease. The median overall survival was 12 months (95% CI 9.89-14.11). We found anemia (62.5%) to be more prominent than the other toxicities followed by thrombocytopenia and vomiting (31.3%). The nonhematological toxicities were minimal and manageable.

CONCLUSION

Treatment with gemcitabine and carboplatin is efficacious with manageable toxicity profile in the real world non-clinical trial setting.

[Antimetabolites]

Antimetabolites are cytotoxic agents, which have been developed for more than 50  years. Which cancer patient did not receive or will not receive 5-fluorouracil or methotrexate during the evolution his or her disease? Antimetabolites are defined as interfering with the synthesis of the DNA constituents; they are structural analogues, either of purine and pyrimidine bases (or the corresponding nucleosides), or of folate cofactors, which are involved at several steps of purine and pyrimidine biosynthesis. Their first mechanism of action is, therefore, to induce depletion in nucleotides inducing in turn an inhibition of DNA replication. However, some of them are able to get inserted fraudulently into nucleic acids, inducing structural abnormalities leading to cell death by other mechanisms, including DNA breaks. We present in this paper, for the three classes of antimetabolites, both ancient and recent molecules as well as molecules still in clinical trials, without exhaustivity.