ABSTRACT
Background:Diabetes mellitus has remained the major concern for medical sciences researches duetoits deleterious effects on general, physical and mental health of patients. To understand the pathophysiology and to explore better treatment options for such kind of metabolic disorders it is necessary to generate the experimental animal models. To create diabetic animal models, streptozotocin has shown predominance in selectivity as a diabetogenic agent. While studying effects of any intervention in the diabetic animal models, being a cytotoxic drug streptozotocin may affect the study results by inhibiting highly replicating cells especially hematopoietic cells.Original ResearchArticle Aims:The aim of study was to analyze the effects of streptozotocin on various cellular components of blood such as RBCs, WBCs (Lymphocytes, Neutrophils, Eosinophils), Hb%, HCT and Platelets, at baseline,5thday and 15thday without any intervention.Study Design:Animal based Experimentalstudy.Place and duration of Study:The study was conducted at animal house of faculty of Pharmacy Ziauddin University Karachi, while laboratory work was performed at MDRL-1 Ziauddin University.Methodology:In Group A normal saline and in group B and C 60mg / kg streptozotocin diluted in normal saline was administered intraperitoneally. After the confirmation of induction of Diabetes in rats, on fifth day blood samples were drawn from Group A and B and were analyzed. While blood samples from group C weredrawn on fifteenth day.Results:Analysis of various hematological parameters on 5thday revealed that there was a decrease in the levels of Hb, HCT, RBCs and WBCs with an increase in platelet count in group B in comparison to group A (control). On the other hand, in Group C (15th day), blood cell counts (Hb, HCT, RBCs, WBCs, Lymphocytes, Neutrophils and platelets) seemed to recover from streptozotocin induced decline that was observed in group B, however did not reach the baselines as in group A(control).Conclusion:It is concluded that change in hematological parameters of rats after administration of streptozotocin is reversible. The blood parameters may recover near to base line values without any intervention within two weeks
ABSTRACT
Major depressive disorder [MDD] is the leading cause of memory impairment in general population. The serotonin hypothesis provides a target model for the treatment of depression and depression-associated memory loss. 5- HT-1B receptor is suggested as a potential candidate in the pathophysiology of depressive illness. Dysfunction of 5-HT- 1B receptors has been observed previously in depressive patients. Zolmitriptan, 5-HT-1B agonist is clinically recommended for the treatment of migraine. However, in present study this drug was tested as a potential treatment for depression and associated memory loss by altering the serotonergic function at receptor level. Rats [n=24] were equally divided into unstressed and stressed groups. Depression was induced by 19 days of restraint stress for 4 h which was followed by forced swim test and pattern separation test to assess depressive symptoms and memory impairment, respectively. The initial sign of depression-associated memory loss involves impaired pattern separation which is regarded as pseudodementia. In this study stressed rats showed depression- and pseudodementia-like symptoms. After the induction of depression, rats were treated with zolmitriptan at a dose of 0.3 mg/kg which resulted in a significant attenuation of depression and depression-associated memory impairment. Results are discussed with reference to the modulation of function of 5-HT-1B receptor following the administration of exogenous agonist
ABSTRACT
Excessive exposure of cadmium which is regarded as a neurotoxin can stimulate aging process by inducing abnormality in neuronal function. It has been reported that supplementation of almond and walnut attenuate age-related memory loss. Present study was designed to investigate the weekly administration of cadmium for one month on learning and memory function with relation to cholinergic activity. Cadmium was administered at the dose of 50 mg/kg/week. Whereas, almond and walnut was supplemented at the dose of 400 mg/kg/day along with cadmium administration to separate set of rats. At the end of experiment, memory function was assessed by Morris water maze, open field test and novel object recognition test. Results of the present study showed that cadmium administration significantly reduced memory retention. Reduced acetylcholine levels and elevated acetyl cholinesterase activity were also observed in frontal cortex and hippocampus of cadmium treated rats. Malondialdehyde levels were also significantly increased following the administration of cadmium. Daily supplementation of almond and walnut for 28 days significantly attenuated cadmium-induced memory impairment in rats. Results of the present study are discussed in term of cholinergic activity in cadmium-induced memory loss and its attenuation by nuts supplementation in rats
ABSTRACT
To compare the effect of metformin with clomiphene citrate on ovulation and conception rate in patients with polycystic ovarian syndrome [PCOS] one hundred infertile patients due to PCOS were selected from the Gynecology Unit III of Dow University of Health Sciences. They were divided into 2 groups each with 50 patients. Group I received metformin 500 mg per orally thrice daily for 4 months while Group II received clomiphene citrate 50 mg per orally [which was increased to 100 mg according to response] per day for 5 days following spontaneous or medroxyprogesterone acetate induced withdrawal bleeding for 4 months. Serum progesterone level was estimated on day 0, then on day 21 and finally on day120. In both the groups significant increase was found in serum progesterone level from day 0 to day 120. In group I, serum progesterone increased from 1.7ng/ml at day-0 to 11.3ng/ml at day-120. In group II, it increased from1.5 ng/ml at day-0 to7.3 ng/ml at day-120. Out of 50 patients 40 [80%] patients showed evidence of ovulation in Group I and 13 [26%] patients showed evidence of ovulation in Group II with conception rate of 67% in Group I and 16% in Group II being confirmed by urine pregnancy test. In conclusion metformin has exerted highly significant effects on the ovulation and conception rate in comparison to clomiphene citrate in PCOS infertile patients