background: learning and memory are the most intensively studied subjects in neuroscience. two sites of mammalian brain which are important in learning and memory are ca1 region of hippocampus and purkinje cell layer of cerebellum. so, the aim of present investigation was to study of the effect of ovariectomy and passive avoidance learning on nr1 subunit of n-methyl-d-aspartate (nmda) receptor ...

OBJECTIVES Estrogen could affect the rate and quality of wound healing in skin. We aimed to investigate the effects of ovariectomy on skin flap viability and myeloperoxidase (MPO) levels in a rat model. BACKGROUND Estrogens have many important beneficial and protective roles in skin that they improve collagen content and quality, maintain skin thickness and enhance vascularization. It has bee...

Background: Volume estimation of brain is important for many neurological applications. It is necessary in measuring brain growth and changes in brain in normal/abnormal patients. Thus, accurate brain volume measurement is very important. Magnetic resonance imaging (MRI) is the method of choice for volume quantification due to excellent levels of image resolution and between-tissue contrast. St...

Ovarian hormones are associated with binge eating in women, however findings are limited by the lack of experimental control inherent in human studies. Animal research that manipulates ovarian hormone status and examines individual differences in extreme binge eating proneness is needed to model clinical phenotypes in humans and to confirm causal effects. The purpose of this study was to examin...

AIM To evaluate in a rat animal model whether ovariectomy, high fat diet (HFD), and physical activity in the form of running affect leptin receptor (Ob-R) distribution in the brain and white fat tissue compared to sham (Sh) surgery, standard diet (StD), and sedentary conditions. METHODS The study included 48 female laboratory Wistar rats (4 weeks old). Following eight weeks of feeding with st...

Objective—The effects of vasectomy on testes and related structures are disputable. The aim of this study was to determine whether the reproductive organs of rabbits were influenced after 12 months vasectomy. Study design—Bilateral vasectomy was performed on 10 male adult New Zealand Big Eared White Rabbits (another 10 rabbits set as sham operated group) and tissue samples were examined by ligh...

OBJECTIVES The loss of ovarian function in women through aging or oophorectomy is often associated with the development of vaginal hyperalgesia that can be alleviated with estrogen replacement. This study examined if ovariectomy in rats would similarly give rise to vaginal hyperalgesia, and, if so, whether estrogen replacement would alleviate it. METHODS Female rats were trained to perform an...

BACKGROUND The purpose of this study was to investigate the effect of estrogen alteration on the expression of caveolin 2 and 3 in rat smooth muscle of urinary bladder. METHODS Female Sprague-Dawley rats were divided into three groups: control, bilateral ovariectomy (Ovx), and bilateral ovariectomy followed by subcutaneous injections of 17β-estradiol (Ovx+Est). After 4 weeks, urodynamic measu...

Rat mammary carcinomas were induced by directly inserting activated neu or ras genes into in situ rat mammary ductal cells using replication-defective retroviral vectors. neu was over 200 times more potent than ras in inducing rat mammary carcinomas. Ovariectomy 2 days postinfection dramatically reduced the occurrence of carcinomas induced by neu and extended their latency. In general, early ov...

Background. A higher prevalence of cardiovascular disorders has been observed in women after menopause. This study aimed to determine the long-term effects ovariectomy on hemodynamic functions and level nitric oxide metabolites (NOx) heart tissue ovariectomized rats. Methods. Fourteen female Wistar rats were divided into two groups (n=7 each group) control (OVX). OVX rat model was induced using...