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    Adrenergic receptor behaviors of mesenchymal stem cells obtained from different tissue sources and the effect of the receptor blockade on differentiation
    (Taylor & Francis Ltd, 2022) Maytalman, Erkan; Alizadeh Yegani, Arash; Kozanoglu, Ilknur; Aksu, Fazilet
    In this study, it was aimed to analyze behavioral changes of adrenergic receptors (ARs) in first three passages and osteogenic/adipogenic differentiation of mesenchymal stem cells (MSCs) derived from placenta fetal membrane (FM) and bone marrow (BM). It was also aimed to evaluate effects of receptor blockade on differentiation. We obtained first three passages of MSCs from placenta and BM samples. For cell identification, the cells were analyzed by flow cytometry using CD34, CD45 and CD3, CD105 antibodies in each passage. The effects of propranolol and phenoxybenzamine at incremental doses were analyzed by MTT. In addition, cell cultures were separately maintained with the blockers or without after second passage. After each passage and differentiation, alpha 1A, alpha 1B, alpha 2A, alpha 2B, beta 1, beta 2, beta 3 AR-mRNA expressions analyzed by RT-qPCR technique. BMP6 and PPARG mRNA expressions only after differentiation and passage 3 were analyzed. A microscopic examination was also performed. Our results showed that AR expression behaviors were different in MSCs obtained from different tissue sources. In particular, alpha(1A)-AR and alpha(2A)-AR were expressed with considerably high coefficients in differentiation under blocker effect in BM-derived MSCs. No such coefficients were observed in any group of placental MSCs. In addition, it was found that the blockers stimulated adipogenesis in BM-derived MSCs during osteogenic differentiation. MSCs exhibit protein expressions that vary according to source of tissue and differentiation. Given that MSCs from different sources are used for repair and modulation, our study makes implications of this variable expression intriguing in the clinical practice.
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    Effect of milk and whey on proliferation and differentiation of placental stromal cells
    (Springer, 2023) Boga, Bircan; Akbulut, Merve; Maytalman, Erkan; Kozanoglu, Ilknur
    Fetal bovine serum (FBS), which is widely used in cell culture media, has the potential to cause medical and ethical problems. Here, an experimental study using milk or whey proteins containing essential nutrients and growth factors is presented to limit the use of FBS in cell culture media produced for cell and tissue regeneration. Study groups were formed by culturing human placenta mesenchymal stem cells, known to have high proliferation and differentiation capacity, with milk or whey solution at increasing concentrations, alone or in combination with FBS. Osteogenic and adipogenic differentiation capacities of proliferating cells were observed in FBS, milk or whey groups. Milk, whey or FBS groups obtained in P3 and after differentiation were separately analyzed for protein mRNA expression by reverse transcriptase-polymerase chain reaction (RT-qPCR). Fibroblast Growth Factor 2 (FGF2), Octamer-binding Transcription Factor 4 (OCT4), Bone Morphogenetic Protein 6 (BMP6), and adipogenic differentiation marker Peroxisome Proliferator-Activated Receptor Gamma (PPARG) were analysed by RT-qPCR. Proliferation was more pronounced in FBS alone and in its combinations with milk-whey compared to the groups in which only milk and whey were used. OCT4 mRNA and FGF2 mRNA expression decreased in differentiated cells. BMP6 mRNA expression increased with osteogenic and adipogenic stimuli. As expected, PPRG expression also increased with adipogenic stimulation. With this experimental study, evidence has been obtained that milk or whey can provide nutritional support to the culture media of repair cells and preserve the functional capacity of the cells, with a slightly more limited capacity than FBS. [GRAPHICS] .
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    INHIBITORY EFFECT OF CELL PHONES AGAINST HUMAN BREAST CANCER AND MYELOID LEUKEMIA CELLS GROWTH IN CULTURE MEDIA
    (2023) Boğa, Bircan; Akbulut, Merve; Maytalman, Erkan; Kozanoglu, Ilknur
    Objective: There is current news that emerges regarding the relationship between the magnetic effects of cell phones and some types of cancer. In spite of the studies carried out, the level of evidence of this news is low, and also the relationship between the magnetic effects of cell phones and other types of cancer is not certain except for brain cancer. In this study, it is aimed to examinethe effects of magnetic field of cell phones on the samples of breast cancer human myeloid leukemia cell growth. Methods: In the study, breast cancer MCF-7 and leukemia K562 cell lines were used as the source of cancer cells. During the six-day cell culture, cancer cells were subjected to the effects of cell phone by using a telephone call program (Automated outbound call software). The system made 6 calls for 1 minute for each call once in 144 minutes from a fixed line. The number of cultured cells and proliferation capacities of the two types of tumor cells in the control and experimental groups were assessed. Results: The number of cancer cells, which were subjected to the effects of cell phone as a result of the culture of tumor cells, was found lower when compared with control group (7500000 ± 100000 vs 6625000 ± 225000 for MCF-7; 15412500 ± 112500 vs 13700000 ± 250000 for K562; P < 0.05 for both). In MTT test, it was found out that two types of cell proliferation were inclined to slow down with the effect of cell phone. Conclusion: The results can be translated that cell phone may inhibit neoplastic transformation, and this observation may promote to initiate new clinical studies both for healthy people and for patients with cancer.