scholarly journals Assessment role of total phenols and flavonoids extracted from Pleurotus columbinus mushroom on the premature ovarian failure induced by chemotherapy in rats

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Amal I. Hassan ◽  
Mona A. M. Ghoneim ◽  
Manal G. Mahmoud ◽  
Mohsen S. Asker
Keyword(s):  
Total Phenol ◽  
Female Rats ◽  
Free Radical Scavengers ◽  
Histopathological Analysis ◽  
Antioxidant Agent ◽  
Ovarian Damage ◽  
Apoptotic Effects ◽  
The Impact ◽  
Phenol Extract

Abstract Background Many species of mushroom contain an assortment of free radical scavengers (Phenolics and Flavonoids compounds) that have made them nutritionally beneficial and a source of expansion of drug production. In this study, we examined the preventive and remedial role of total phenol extract from Pleurotus columbines (TP) in alleviating the consequences of cyclophosphamide (CTX) on the ovaries of female rats. Rats were randomly assigned to four groups: healthy controls, cyclophosphamide (CTX), received a TP (100 mg/kg) orally daily for 14 days and curative group: CTX-TP, we determined and identified a total phenol from a mushroom extract and examined it as an antioxidant agent. To investigate the therapeutic influence, it was administrated 2 weeks after CTX. To assess the impact of TP on ovarian damage caused by CTX, ovarian hormone tests were performed such as luteinizing hormone (LH), 17-β-estradiol (E2), and anti-mullerian hormone (AMH). Besides, follicle-stimulating hormone (FSH) in serum was evaluated, and histopathological analysis of the ovary was examined. Results This study indicates that treatment with TP decreased the severity of cyclophosphamide-induced ovary injury by reducing inflammation and apoptotic effects and increasing the activity of antioxidants. Conclusions TP could be used to alleviate cyclophosphamide-induced ovary injury.

scholarly journals Induction of experimental mammary carcinogenesis in rats with 7,12-dimethylbenz(a)anthracene

2004 ◽  
Vol 59 (5) ◽  
pp. 257-261 ◽  
Author(s):  
Alfredo Carlos S. D. Barros ◽  
Elisa Naomi K. Muranaka ◽  
Lincon Jo Mori ◽  
Christina Helena T. Pelizon ◽  
Kyoshi Iriya ◽  
...  
Keyword(s):  
Animal Model ◽  
Light Microscopy ◽  
Breast Tumor ◽  
Mammary Carcinogenesis ◽  
Mammary Glands ◽  
Female Rats ◽  
Histopathological Analysis ◽  
Breast Carcinomas ◽  
Sprague Dawley

PURPOSE: To test an experimental model of chemical mammary carcinogenesis induction in rats. METHODS: Twenty young virgin Sprague-Dawley female rats, aged 47 days, received 20 mg of 7,12-dimethylbenz(a)anthracene (DMBA) intragastrically by gavage. Afterwards, at 8 and 13 weeks, their mammary glands were examined. At the end of the experiment, the animals were sacrificed, and the mammary tumors were measured and weighed. Tumor fragments were analyzed using light microscopy. RESULTS: Eight weeks after DMBA injection, 16 rats presented at least 1 breast tumor (80%). After 13 weeks, all of them (100%) developed breast carcinomas that were confirmed by histopathological analysis. CONCLUSION: This experimental animal model of chemical mammary induced carcinogenesis is feasible and can be used in further experiments on the role of tumorigenic biomodulator substances.

scholarly journals Gender Difference in Renal Blood Flow Response to Angiotensin II Administration after Ischemia/Reperfusion in Rats: The Role of AT2 Receptor

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Maryam Maleki ◽  
Mehdi Nematbakhsh
Keyword(s):  
Blood Flow ◽  
Angiotensin Ii ◽  
Renal Blood Flow ◽  
Ischemia Reperfusion ◽  
Renal Ischemia ◽  
Female Rats ◽  
Male Rats ◽  
Ang Ii ◽  
The Impact

Background. Renal ischemia/reperfusion (I/R) is one of the major causes of kidney failure, and it may interact with renin angiotensin system while angiotensin II (Ang II) type 2 receptor (AT2R) expression is gender dependent. We examined the role of AT2R blockade on vascular response to Ang II after I/R in rats.Methods.Male and female rats were subjected to 30 min renal ischemia followed by reperfusion. Two groups of rats received either vehicle or AT2R antagonist, PD123319. Mean arterial pressure (MAP), and renal blood flow (RBF) responses were assessed during graded Ang II (100, 300, and 1000 ng/kg/min, i.v.) infusion at controlled renal perfusion pressure (RPP).Results.Vehicle or antagonist did not alter MAP, RPP, and RBF levels significantly; however, 30 min after reperfusion, RBF decreased insignificantly in female treated with PD123319 (P=0.07). Ang II reduced RBF and increased renal vascular resistance (RVR) in a dose-related fashion (Pdose<0.0001), and PD123319 intensified the reduction of RBF response in female (Pgroup<0.005), but not in male rats.Conclusion.The impact of the AT2R on vascular responses to Ang II in renal I/R injury appears to be sexually dimorphic. PD123319 infusion promotes these hemodynamic responses in female more than in male rats.

Taste reactivity responses in rats: influence of sex and the estrous cycle

1998 ◽  
Vol 274 (3) ◽  
pp. R718-R724 ◽  
Author(s):  
Sharon N. D. A. Clarke ◽  
Klaus-Peter Ossenkopp
Keyword(s):  
Estrous Cycle ◽  
Gonadal Hormones ◽  
Female Rats ◽  
Male Rats ◽  
Taste Reactivity ◽  
Male And Female ◽  
Food Items ◽  
Reactivity Test ◽  
The Impact

Gonadal hormones (e.g., estradiol) may regulate feeding by producing a shift in the taste or palatability of food items. This study examined the impact of endogenous gonadal hormones on palatability by investigating sex differences in taste responsivity, as well as the effect of the estrous cycle on taste responsivity, in a rodent model. In the taste reactivity test, male and female Long-Evans rats received a brief (1 min) intraoral infusion of one of three tastants: sucrose (0.3 M), quinine (0.0003 M), and a sucrose-quinine mixture (0.3 M sucrose and 0.0003 M quinine). Statistical analyses indicated that female rats tested during diestrus or proestrus produced significantly more ingestive responses than did male rats and fewer aversive responses than did both male rats and female rats tested during estrus or metestrus ( P < 0.05). These results indicate a sex difference in taste responsivity in the rat that is modulated by the reproductive status of female rats. This finding implies a role of gonadal hormones in the regulation of taste responsivity in the rat.

Intergroup Threat and Outgroup Attitudes

2013 ◽  
Vol 44 (5) ◽  
pp. 311-319 ◽  
Author(s):  
Marco Brambilla ◽  
David A. Butz
Keyword(s):  
Gay Men ◽  
Social Group ◽  
Welfare Recipients ◽  
Intergroup Attitudes ◽  
Social Policies ◽  
Intergroup Threat ◽  
Economic Threat ◽  
The Impact ◽  
General Climate

Two studies examined the impact of macrolevel symbolic threat on intergroup attitudes. In Study 1 (N = 71), participants exposed to a macrosymbolic threat (vs. nonsymbolic threat and neutral topic) reported less support toward social policies concerning gay men, an outgroup whose stereotypes implies a threat to values, but not toward welfare recipients, a social group whose stereotypes do not imply a threat to values. Study 2 (N = 78) showed that, whereas macrolevel symbolic threat led to less favorable attitudes toward gay men, macroeconomic threat led to less favorable attitudes toward Asians, an outgroup whose stereotypes imply an economic threat. These findings are discussed in terms of their implications for understanding the role of a general climate of threat in shaping intergroup attitudes.

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