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Polyclonal rabbit anti-human ovarian cancer globulins inhibit tumor growth through apoptosis involving the caspase signaling.

ABSTRACT: Most women with ovarian cancer are diagnosed at an advanced stage and there are few therapeutic options. Recently, monoclonal antibody therapies have had limited success, thus more effective antibodies are needed to improve long-term survival. In this report, we prepared polyclonal rabbit anti-ovarian cancer antibody (Poly Ab) by immunizing rabbits with the human ovarian cancer cell line SKOV3. The Poly Ab bound to SKOV3 and inhibited the cancer cells proliferation. Western blot analysis was conducted, which indicated that Poly Ab inhibited cancer cells through apoptosis involving the caspase signaling pathway including caspase-3 and caspase-9. Finally, compared with the control antibody, administration of Poly Ab reached 64% and 72% tumor inhibition in the subcutaneous and intraperitoneal xenograft mouse model, respectively. Our findings suggest that Poly Ab is an effective agent for apoptosis induction and may be useful as a safe anticancer agent for ovarian cancer therapy.

SUBMITTER: Zhang S

PROVIDER: S-EPMC4021334 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature

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Polyclonal rabbit anti-human ovarian cancer globulins inhibit tumor growth through apoptosis involving the caspase signaling.

Zhang Shuang S Yu Min M Deng Hongxin H Shen Guobo G Wei Yuquan Y

Scientific reports 20140515

Most women with ovarian cancer are diagnosed at an advanced stage and there are few therapeutic options. Recently, monoclonal antibody therapies have had limited success, thus more effective antibodies are needed to improve long-term survival. In this report, we prepared polyclonal rabbit anti-ovarian cancer antibody (Poly Ab) by immunizing rabbits with the human ovarian cancer cell line SKOV3. The Poly Ab bound to SKOV3 and inhibited the cancer cells proliferation. Western blot analysis was con ...[more]

PMID: 24828460

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Project description:Clofarabine (2‑chloro‑2'‑fluoro‑2'‑deoxyarabinosyladenine, CIF), a second‑generation 2'‑deoxyadenosine analog, possesses a variety of anti‑cancer activities, including the capacity to modulate DNA methylation marks. Bioactive nutrients, including resveratrol (RSV) and all‑trans retinoic acid (ATRA) have been indicated to regulate epigenetic machinery in malignant cells. The purpose of the current study was to evaluate whether the tested phytochemicals, RSV or ATRA, can improve the therapeutic epigenetic effects of CIF in chronic myeloid leukemia (CML) cells. The present study investigates, to the best of our knowledge, for the first time, the influence of CIF in combination with RSV or ATRA on the expression of relevant modifiers of DNA methylation machinery, including DNA Methyltransferase 1 (DNMT1) and Cyclin dependent kinase inhibitor 1A (CDKN1A) in CML cells. Subsequently, the combinatorial effects on promoter methylation and transcript levels of methylation‑silenced tumor suppressor genes (TSGs), including phosphatase and tensin homologue (PTEN) and retinoic acid receptor beta (RARB), were estimated using MSRA and qPCR, respectively. The tested TSGs were chosen according to bioinformatical analysis of publicly available clinical data of human DNA methylation and gene expression arrays in leukemia patients. The K562 cell line was used as an experimental CML in vitro model. Following a period of 72 h exposure of K562 cells, the tested combinations led to significant cell growth inhibition and induction of caspase‑3‑dependent apoptosis. These observations were accompanied by DNMT1 downregulation and CDKN1A upregulation, with a concomitant enhanced decrease in DNMT1 protein level, especially after ATRA treatment with CIF. Concurrent methylation‑mediated RARB and PTEN reactivation was detected. The results of the current study demonstrated that CIF that was used in combination with the tested phytochemicals, RSV or ATRA, exhibited a greater ability to remodel DNA methylation marks and promote cell death in CML cells. These results may support the application of CIF combinations with natural bioactive agents in anti‑leukemic epigenetic therapy.

Dataset Information

Polyclonal rabbit anti-human ovarian cancer globulins inhibit tumor growth through apoptosis involving the caspase signaling.

Publications

Polyclonal rabbit anti-human ovarian cancer globulins inhibit tumor growth through apoptosis involving the caspase signaling.

Similar Datasets

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