Testosterone implants into the lateral septum of male rats, a positive effect on LH and FSH secretion

1987 ◽  
Vol 19 (1) ◽  
pp. 149-151 ◽  
Author(s):  
Alfonso Carreras ◽  
Carmen Mendoza ◽  
Esperanza Ortega ◽  
Estrella Ruiz
2001 ◽  
Vol 27 (1-2) ◽  
pp. 35-40
Author(s):  
G. Roca ◽  
J. M. Torres ◽  
E. Ruiz ◽  
E. Ortega

2020 ◽  
Vol 75 (3) ◽  
pp. 107-111
Author(s):  
A.V. Voronkov ◽  
◽  
S.A. Nigaryan ◽  
D.I. Pozdnyakov ◽  
◽  
...  

The article presents the results of the study of the nootropic activity of hesperidin and curcumin in conditions of focal cerebral ischemia. Studies were conducted on Wistar male rats, which reproduced the focal ischemia of the right middle cerebral artery. Experimental compounds and the reference drug (Mexidol) are administered intragastrally at the next day after surgery at a dosage of 100 mg/kg for three days. Researched using memory and cognitive assessment models – the method of avoiding passive (passive avoidance reaction) and active (TEA) environments. The effect of these compounds on the level of formation of lactate, pyruvate, and the degree of necrosis was studied. Against the background of focal cerebral ischemia, hesperidin significantly improved the studied parameters, curcumin did not show a positive effect on all the studied parameters, and therefore inferior to the heotropic activity on nootropic activity. The results of experimental data suggest the possibility of further in-depth study of hesperidin for cerebroprotective and nootropic activity.


2020 ◽  
Vol 10 (12) ◽  
pp. 382-393
Author(s):  
Nataliya Volotovska

Among the current medical and social problems, injuries and blood loss occupy a prominent place, causing stress on the antioxidant defenses. Hypoxia, which underlies the pathogenesis of the post-traumatic period of both diseases, leads to a significant imbalance in the work of internal organs. Scientists are increasingly attracted by the need to use a tourniquet or intraoperative ligatures, as reperfusion local and systemic damage develops. Antioxidants are considered a promising means of correction.The aim of the study was to investigate the features of metabolic disorders in the liver in the early post-traumatic period on the background of the use of a tourniquet and the effectiveness of thiocetam correction.Materials and methods. The experiment was perfomed on 130 white male rats (200-250 g), which were divided into 4 groups: control – the CG, the EG-1 – combination of limb ischemia-reperfusion (IR) with blood loss, the EG-2 – combination of limb IR with blood loss and mechanical trauma of the thigh; the EG-3 combination of limb IR, blood loss, mechanical injury and thiocetam administration. The Malonic dialdehide level catalase activity were estimated in the liver.Results. The use of thiocetam, which is able to struggle against of ischemia and lipid peroxidation by reactivating antiradical enzymes: superoxide dismutase, catalase and glutathione peroxidase, had a positive effect on the state of antioxidant and prooxidant units in the organ, located far from the place of primary ischemia-reperfusion. If in the group of untrated animals (the EG-2, where massive blood loss was combined with a thigh fracture and the use of hemostatic tourniquet) in the early period, the MDA level exceeded the CG data in 5,4 times, and on the 7th and 14th days remained high – being higher on 2,1 times and on 2,7 times, then in the EG-3 (group of treated animals) on the 1st day the level of MDA exceeded the CG data in 4,3 times, but on the 7th and 14th days was higher by 90,5 % and 64 % respectively. The supportive effect of thiocetam on the activity of catalase in the liver was also noted. Thus, in EG-2 the level of antioxidant enzyme on the 1st day decreased by 71,7 %, and remained almost at this level throughout the all post-experimental period. As for the group of treated animals, the level of activity on the 1st day after the intervention decreased by 44,7%, and was so for almost the entire period. On the 14th day, it remained reduced compared to the CG by 35,1 %, while in EG-2 this index was lower compared to the CG by 70,5 %.Conclusion. Having the positive effect of the introduction of thiocetam in the ischemic area, we can eventually add new complex, given the world experience, which would affect the development of the inflammatory response and the rheological properties of blood.


2012 ◽  
Vol 67 (3) ◽  
pp. 86-90
Author(s):  
D. S. Sukhanov ◽  
A. Yu. Petrov ◽  
A. L. Kovalenko ◽  
M. G. Romantsov

A comparative study of the level of endogenous S-adenosyl-L-methionine (SAM) with other hepatoprotectors in pharmacological correction of liver drug lesion. Among 117 male rats. It has been shown that among antituberculous drugs only Remaxol and Runihol were causing significant increase in endogenic SAM. Taking into account the amelioration of lab results as well as histological condition of the liver against the background of Remaxol treatment as well as positive effect of Runihol treatment upon cholestasis, one can draw a conclusion  upon the importance of succinic acid together with SAM induction as a part of hepatoprotective effect of the drug.  Reamberin, which contains succinic acid without methionine also shows hepatoprotective qualities and doesn’t induce endogenous SAM production. Positive therapeutic effect of exogenous SAM regardless the way of administration doesn’t correlate with endogenous SAM induction, and is associated with the external hepatocyte cell membrane restoration.     


2020 ◽  
Vol 10 ◽  
Author(s):  
Neveen Asmet Farag ◽  
Ayman S Mohamed ◽  
Hanan Farag El Sayed ◽  
Eman Y. Salah EL-Din ◽  
Abdel Rahman A. Tawfik

Background:: Infertility is the first-rate public health trouble affecting one in five married couples globally, male causes embody a significant proportion. Natural products could be an alternative or complementary inexpensive treatment for such matters. Echinochrome (Ech) is a natural quinone pigment obtained from sea urchin, and it was confirmed to possess many pharmacological properties due to its chemical activity. Objective:: The current research paper was targeted to evaluate the potential effects of Ech on male fertility, and to highlight the possible involved mechanisms. Methods:: Eighteen adult male rats were randomly distributed into three groups: control (1 ml of 2% DMSO, p.o.), low dose Ech (0.1 mg/kg, p.o.), and high dose Ech (1 mg/kg p.o.). Results:: The high dose Ech caused a significant decline in the levels of glucose, ALT, AST, ALP, urea, Cr, uric acid, TG, TC and LDL-C and testicular tissue MDA, while it caused a significant rise in the levels of albumin, TP, HDL-C, FSH, LH, testosterone and testicular tissue GSH activity. Moreover, it showed a significant positive effect on the testis weight, caudal epididymis weight, sperm count, sperm motility, sperm morphology, fructose concentration, and α-glucosidase activity. However, no significant changes were observed in histological examination of testicular tissue among all groups. Conclusion:: High dose Ech improved male rat-fertility either directly by activating the pituitary gonadal axis, and or indirectly via enhancing: the renal and hepatic functions, the lipid profile and or the antioxidant pathways.


Endocrinology ◽  
2006 ◽  
Vol 147 (10) ◽  
pp. 4578-4588 ◽  
Author(s):  
Pauline M. Jamieson ◽  
Chien Li ◽  
Christina Kukura ◽  
Joan Vaughan ◽  
Wylie Vale

The endogenous corticotropin-releasing factor (CRF) type 2 receptor (CRFR2)-selective ligand urocortin 3 is expressed in discrete subcortical brain regions with fibers distributed mainly to hypothalamic and limbic structures. Close anatomical association between major urocortin 3 terminal fields and CRFR2 in hypothalamus, lateral septum, and medial amygdala (MEA) suggest it is well placed to modulate behavioral and hormonal responses to stress. Urocortin 3 was administered intracerebroventricularly to male rats under basal conditions or before a restraint stress, and circulating ACTH, corticosterone, glucose, and insulin were measured. Urocortin 3 activated the hypothalamic-pituitary-adrenal axis under basal conditions and augmented ACTH responses to restraint stress. Elevated blood glucose with lowered insulin to glucose ratios in both groups suggested increased sympathetic activity. Circulating catecholamines were also increased by urocortin 3, providing additional evidence for sympathoadrenomedullary stimulation. Intracerebroventricular urocortin 3 increased vasopressin mRNA expression in the parvocellular division of the hypothalamic paraventricular nucleus, whereas CRF expression was unchanged, providing a possible mechanism by which urocortin 3 mediates its actions. Urocortin 3 mRNA expression was examined after exposure to stress-related paradigms. Restraint increased levels in MEA with a trend to increased expression in the rostral perifornical hypothalamic area, whereas hemorrhage and food deprivation decreased expression in MEA. Adrenalectomy markedly increased expression in the rostral perifornical hypothalamic area, and high-level corticosterone replacement restored this to control levels. The evidence that urocortin 3 has the potential to influence hormonal components of the stress response and the changes in its expression levels after stressors is consistent with a potential function for the endogenous peptide in modulating stress responses.


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