Browsing by Author "Bitgen, Nazmiye"

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Caffeine Increased Antitumor Effects of Paclitaxel (Ptx) in Mcf-7 and Mda-Mb Breast Cancer Cells
(Marmara Univ, 2023) Aydin, Funda; Onder, Gozde Ozge; Goktepe, Ozge; Bitgen, Nazmiye
Although progress has been made in the diagnosis and treatment of breast cancer, which is one of the most important causes of women's health, it is still one of the leading causes of death in women. One of the most prominent causes for this is illness resistance to the medications employed in treatment. For this reason, the trend towards combination therapy research has increased in addition to conventional therapy. In this study, we aimed to investigate the effect of co-administration of caffeine (CAF) and paclitaxel (PTX), which is frequently used in breast cancer, on MDA-MB-231 and MCF-7 cells. For this purpose, 4 groups were determined as control, CAF, PTX and CAF+ PTX. MTT assay was used to assess cell viability and the appropriate dose for CAF was determined. The apoptotic effect of the drug combination on cell lines was evaluated with the TUNEL method, and it was determined at what stage it paused cell division by cell cycle analysis. According to the study's findings, the results indicated that CAF induced apoptosis in breast cancer cells and the best effect was in the group administered with PTX. Furthermore, it was discovered that CAF and PTX in the MCF-7 cell lines, both together and separately, blocked cell division in the S phase in MCF-7 cell lines. These results are promising for future studies that will prove the usefulness of CAF as an adjuvant in the treatment of breast cancer.
A Newly Synthesized Benzimidazolium Salt: 1-(2 Chloride as a Potential Anticancer Agent for Colon Cancer Treatment, in Vitro Study
(Wiley, 2025) Bitgen, Nazmiye; Cakir, Mustafa; Akkoc, Senem; Donmez-Altuntas, Hamiyet
Colon cancer is one of the most common cancer-related deaths. Drug resistance is one of the biggest challenges in cancer treatment. Numerous pharmacological and biochemical investigations have documented the benzimidazole ring's anticancer, anti-inflammatory, and antioxidant properties. Within the scope of our project, the effect of newly synthesized benzimidazolium salt (BS) on cell proliferation was tested with MTT assay, and its effect on apoptosis and cell cycle was tested with annexin V and PI in the two different colon cancer cell lines (HT-29 and DLD-1). Our study examined the expressions of some genes related to apoptosis and, additionally, caspase activities with the multicaspase kit.BS showed an antiproliferative effect at lower doses in HT-29 colon cancer cells. When HT-29 cells were exposed to a 20 mu M dosage, they showed increased caspase activity and apoptosis compared to DLD-1 cells. HT-29 accumulated in the G2/M phase of the cell cycle, whereas DLD-1 cells accumulated more in the S phase. In HT-29 cells, colony formation was inhibited; however, in DLD-1 cells, this effect was insufficient.Based on the apoptosis-death pathway, BS is expected to have anti-cancer effects. As a result of this work, this chemical was thoroughly examined in two different colon cancer cell lines, and additional, more comprehensive initiatives are being planned in light of the information obtained from this study.
The Role of Folic Acid on Pc3 Prostate Cancer Cell Line
(2024) Aydın, Funda; Bitgen, Nazmiye; Önder, Gözde Özge; Baran, Münevver
Aim: Prostate cancer (PCa), one of the most common malignant solid tumors, has become a significant and rapidly increasing global health concern for men. One of the vitamins in the B group that is essential in decreasing the risk of cancer is folic acid (FA). However, the protective effects of FA against PCa are insufficiently examined, and the underlying mechanism is still unknown. In this study, androgen-nonresponsive (PC3) human PCa was used to get a better understanding of the effect of FA on cell proliferation. Material and Method: In the present study, the MTT assay was used to assess FA's inhibitory effect on cellular proliferation. Additionally, all groups underwent the TUNEL immunofluorescence staining procedure to identify apoptosis in the PC3 cell line. Results: The most appropriate cytotoxic dose was determined to be the 24-hour FA values. When apoptotic TUNEL staining was evaluated in the PC3 cell line, FA significantly increased apoptosis. There was not a significant difference observed between the docetaxel (Dtx) and FA groups in terms of TUNEL-positive cell immunoreactivity in the PC3 cell line. There was no apparent distinction in the immunreactivity intensity of TUNEL-positive cells in these groups. Conclusion: The present study provides a fresh perspective on the fundamental mechanism underlying FA's capability to prevent PC3 cancer cells from proliferating. Our findings suggest that FA effectively inhibits PC3 cell line proliferation through the upregulation of apoptosis. Consequently, FA may be a potential novel cytotoxic and therapeutic strategy in the treatment of PCa disease.
Therapeutic Potential of Hesperidin: Apoptosis Induction in Breast Cancer Cell Lines
(Pergamon-elsevier Science Ltd, 2023) Onder, Gozde Ozge; Goktepe, Ozge; Baran, Munevver; Bitgen, Nazmiye; Aydin, Funda; Yaya, Arzu
Hesperidin is a flavonoid commonly found in citrus fruits. Studies have shown that hesperidin has anti-inflammatory, analgesic, and antimicrobial properties, as well as its effectiveness in carcinogenesis. In this paper, we aim to investigate the molecular mechanisms of hesperidin-induced apoptosis in MCF-7 and MDA-MB-231 cancer cells.The inhibitory effect of hesperidin on cellular proliferation was evaluated with the MTT assay. Cell cycle analysis of hesperidin-treated cells was then performed, as well as immunocytochemical analysis of the effect on the apoptosis pathway (TUNEL, Bax, and Bcl-2 expression).Moreover, hesperidin induced cellular apoptosis in MCF-7 breast cancer cells by inhibiting Bcl-2 and enhancing Bax expression at protein levels. On the other hand, hesperidin caused apoptosis in the MDA-MB-231 breast cancer cell line, but it did not activate the Bax/Bcl-2 pathway. Hesperidin also induced cell cycle arrest at the S phase in the MCF-7 and MDA-MB-231 cell lines.These findings showed that hesperidin is a potential therapeutic candidate for preventing the progression of breast cancer. In addition, hesperidin could significantly stimulate the death mechanisms in ER/PR (+) MCF-7 cells by changing the expression balance of Bax and Bcl-2 proteins, but lead ER/PR (-) MDA-MB-231 breast cancer cells to apoptosis in a different way.