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Journal of Research in Medical Sciences، جلد ۱۸، شماره ۳، صفحات ۰-۰
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عنوان انگلیسی Enalapril protects endothelial cells against induced apoptosis in Alzheimer's disease in vitro
چکیده انگلیسی مقاله Normal 0 false false false EN-US X-NONE AR-SA Background: Alzheimer's disease (AD) is a progressive neurodegenerative disease in which endothelial cell (EC) can be affected. In brain, functional changes in ECs contribute to reductions in resting blood flow. Furthermore, angiotensin-converting enzyme inhibitors (ACE-I) have beneficial effects on endothelial dysfunction. This is the first study that presents direct experimental evidence associating endothelial apoptosis as a basis of AD pathogenesis and response to an ACE-I therapy. Materials and Methods: Human umbilical vein ECs (HUVECs) were treated with sera from AD patients and sera from healthy volunteers (each group, n = 10). Apoptosis was determined by annexin V–propidium iodide staining and cell death detection kit. The effect of 50 µM enalapril on endothelial apoptosis was assessed. Nitrite (NO 2 − ) levels were determined in the culture supernatants. Result s: Enalapril suppressed the induction of apoptosis by the serum of patients only when used before treating HUVECs with the sera of AD. Mean ± SD of apoptosis induction in the control group was 6.7 ± 3.69; in the group treated with sera of AD for 24 h was 47.78 ± 0.65; in the group wherein sera from AD was added (pretreatment) after exposure of HUVECs by 50 µM enalapril for 24 h was 26.6 ± 2.63; and in the group wherein HUVECs were exposed in the sera of AD for 24 h and then 50 µM enalapril was added to these cells for another 24 h (post-treatment) was 56.87 ± 5.51. Also, the mean ± SD of NO 2 − concentration showed significantly greater levels of dissolved NO 2 /NO 3 metabolite in the culture media of untreated HUVECs by enalapril (1.03 ± 0.06) as compared with control (0.26 ± 0.13; p < 0.05), while the rate of nitric oxide (NO) significantly decreased when enalapril was presented in culture both in the pretreatment (0.07 ± 0.003) and in the post-treatment group (0.06 ± 0.005; p < 0.05). Conclusion: It could be concluded that EC treated with sera from AD patients activates apoptosis in HUVECs; this effect was reversed by enalapril pretreatment. This can be proposed as a therapeutic approach for Alzheimer`s patients.
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نویسندگان مقاله رخساره معمار | rokhsareh meamar
department of medical science, islamic azad university, najaf abad branch and isfahan neurosciences research center, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

شقایق حقجو جوانمرد | shaghayegh haghjooy javanmard
department of physiology, applied physiology research center, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

مجید قاسمی | majid ghasemi
isfahan neurosciences research center and department of neurology, school of medicine, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

محمد سعادت نیا | mohamad saadatnia
isfahan neurosciences research center and department of neurology, school of medicine, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

کیوان بصیری | keivan basiri
isfahan neurosciences research center and department of neurology, school of medicine, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

نازنین علایی | nazanin alaie
medical students research committee, isfahan university of medical sciences, isfahan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)

لیلا دهقانی | leila dehghani
department of medical science, islamic azad university, najaf abad branch, isfahan, iran

سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (Islamic azad university science and research branch)

نشانی اینترنتی http://jrms.mui.ac.ir/index.php/jrms/article/view/9020
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