The Relation of Maternal Hypothyroidism and Dendritic Spines Reduction in Brain Pyramidal Cells of Balb/C Mice
Author(s):
Message:
Abstract:
Ba ckground: Thyroid hormones are well known to be essential for normal development of the brain in human and animals. In particular, thyroid deficiency during the prenatal periods causes significant impairments of structural development and organization of the brain. Therefore in this study, the effects of maternal hypothyroidism on morphometrical changes of synaptic sites of pyramidal cells in the mouse brain was evaluated.
Materials And Methods
T his study was carried out on 24 balb/c mice. The animals were divided into two experimental and control groups. The experimental group was made hypothyroid by chemical thyroidectomy with oral propylthyouracil (PTU) in drinking water, while the control group was kept intact. On the 20th postnatal day, by using histological technique preparation and histochemical staining (Golgy) method, we were able to investigate the effects of maternal thyroid hormones deficiency, on the development of pyramidal synaptogenesis in postnatal period of the mouse.
Results
Our findings showed that maternal hypothyroidism during pregnancy cansed a significant decrease of the dendritic spines in the experimental group (31.08 ±0.45) compared with the control group (39.88 ±0.55), (p<0.05). In addition, an increase gap among the synaptic sites of pyramidal cells in the brain cortex among the experimental group (3.78 ±0.86) in contrast with the controls (2.57 ±1.05) were observed (p<0.005).
Conclusion
The results of this study indicated that there is a key role for thyroid hormones in connection with maturation and neuronal development of brain cortex. Also hormonal reduction during pregnancy can affect the development and neuronal synaptogenesis of the next generation.
Language:
Persian
Published:
Journal of Rafsanjan University Of Medical Sciences, Volume:3 Issue: 3, 2004
Page:
172
magiran.com/p253913  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!