Ischemia-reperfusion Injury In Rat Ovary Research Articles

The protective effect of Cloprostenol on ischemia/reperfusion injury in rat ovary: Histopathologic and immunohistochemically evaluation: An experimental study

ObjectıvesThis study investigates whether Cloprostenol, a synthetic prostaglandin analog, could protect against ischemia/reperfusion (IR) injury in rat ovaries. MethodsAdult female rats were divided into four groups: Sham groups, ischemia (IS) groups, ischemia/reperfusion (IR) groups, and Cloprostenol-treated (CT) groups. The IR injury model was established by clamping the ovarian pedicle for a specified period, followed by reperfusion. The CT group received a pre-treatment of Cloprostenol before inducing ischemia. Ovarian tissues were collected for histological, and immunohistochemical examination. ResultsThe IS group exhibited severe morphological damage to ovarian tissues, including disrupted tissue architecture and increased apoptosis (p < 0.001). In contrast, the CT group displayed significantly improved ovarian histology, with notable preservation of ovarian tissue and reduced apoptotic activity (p < 0.01). Immunohistochemical analysis revealed that the levels of 8-Hydroxy-2-deoxyguanosine (8-OHdG), Caspase 3, Cyclooxygenase 2 (COX-2), and Interleukin 1 beta (IL-1β) staining, which were elevated in the IS and IR groups, were significantly diminished in the CT group (p < 0.05). ConclusıonCloprostenol administration before IR injury in rat ovaries demonstrated a remarkable protective effect by improving histological damage and reducing DNA damage inflammation. These results highlight the therapeutic potential of Cloprostenol in safeguarding ovarian health against IR.

The effectiveness of hyaluronic acid and vitamin C in ischemia-reperfusion injury in rat ovaries and their effects on ovarian reserve

The effectiveness of hyaluronic acid and vitamin C in ischemia-reperfusion injury in rat ovaries and their effects on ovarian reserve

Protective effects of glutathione administration on ischemia-reperfusion injury in rat ovaries

We aimed to examine the biochemical and histopathological potential beneficial effects of glutathione administration on the ovarian ischemia/reperfusion injury (IRI) model. Thirty Wistar Albino female rats were used in this experimental study and were divided into five groups. Group 1 (sham) underwent observational laparotomy. Group 2 (torsion) had their left ovaries torsioned. Group 3 (torsion + detorsion) was detorsioned after torsion. Groups 4 and 5 received the same procedure as group 3. 0,2 ml glutathione was applied to the left ovaries of group 4 (torsion + detorsion + intraovarian glutathione injection) after detorsion. Group 5 (torsion + detorsion + intraperitoneal glutathione injection) was administered 1 ml glutathione intraperitoneally five times. Fifteenth-day blood samples were taken to examine total antioxidant status, total oxidant status, oxidative stress index, anti-mullerian hormone (AMH), and malondialdehyde (MDA) values. Besides, the left ovaries were resected for histopathological examination. Total antioxidant status was significantly higher in the intraperitoneal injection group (p&lt;0.05). The AMH values of the sham and intraovarian groups were similar (p&gt;0.05). MDA value did not differ significantly between the sham, intraovarian, and intraperitoneal injection groups (p&gt;0.05). In histopathological examination, no significant benefit of glutathione application on follicle numbers was shown. The main limitations of our study were the relatively small size of our series, the absence of serial blood measurement, the absence of a group in which intraovarian and intraperitoneal injections were administered together, and the absence of a sham + drug group. Glutathione administration reduces the detrimental effects of ovarian IRI.

Protective effects of dehydroepiandrosterone (DHEA) vs caffeic acid phenethyl ester (CAPE) against ischemia-reperfusion injury in rat ovary

Objective: In this study, the effectiveness of caffeic acid phenethyl ester (CAPE) and Dehydroepiandrosterone (DHEA) in preventing ischemia reperfusion injury associated with ovarian torsion have been investigated.&#x0D; Materials and Methods: Twenty four adult female Wistar Albino rats were randomly divided into four groups. Ovaries were not twisted, and only healthy ovarian tissues were removed from the rats in the first group, while ovaries were twisted for 3 hours in the other groups. The second group did not receive any medications before the ovaries were untwisted, while 20 micromole/kg of CAPE was applied on peritoneal surface to the third group, and 60 mg/kg of DHEA was administered intraperitoneally to the fourth group.&#x0D; Results: The level of primordial follicles was higher in the third group compared to the second group after the torsion of the ovary (p=0.017). The mean level of primary follicles was higher in the first group compared to the number of follicles in the third and fourth groups after the torsion of the ovary (p&lt;0.001). The median hemorrhage level was higher in the second group following ovarian torsion compared to that in the first group (p=0.005).&#x0D; Conclusion: Agents that have been considered to reduce injury resulting from ischemia-reperfusion proved ineffective during the early stages in terms of the number of follicles in the ovaries; however, we believe that long-term studies may be more beneficial.

Effects of Pyrroloquinoline Quinone (PQQ) on Ischemia-Reperfusion Injury in Rat Ovaries: Histological and Biochemical Assessments

To evaluate effects of pyrroloquinoline quinone (PQQ) on ischemia-reperfusion injury using a rat ovary model.Thirty healthy female Wistar rats with 250g were randomized into five experimental groups (n = 6): Group SHAM: The rats underwent only laparotomy. Group Ischemia: A 3- hour ischemia only. Group I/R: A 3-hour ischemia and a 3-hour reperfusion. 30 min before termination of reperfusion 20 µL soybeen oil (Solvent of PQQ) was administered. Group I/PQQ: A 3-hour ischemia only and 20 µL (10 mg/kg) intraperitoneal administration (IP) of PQQ 2.5 hours after induction of ischemia. Group I/R/PQQ: A 3-hour ischemia, a 3-hour reperfusion and 20 µL (10 mg/kg) IP of PQQ 2.5 hours after induction of ischemia.Animals treated with PQQ showed significantly ameliorated development of ischemia and reperfusion tissue injury compared to those of other groups (p=0.001). The significant higher values of SOD, GPO and GST were observed in I/R/PQQ animals compared to those of other groups (p=0.001). Damage indicator (MDA) was significantly lower in I/R/PQQ animal compared to those of other groups (p=0.001).Intraperitoneal administration of PQQ could be helpful in minimizing ischemia-reperfusion injury in ovarian tissue exposed to ischemia.

Effects of Pyrroloquinoline Quinone (PQQ) on Ischemia-Reperfusion Injury in Rat Ovaries: Histological and Biochemical Assessments

Objective: To evaluate effects of pyrroloquinoline quinone (PQQ) on ischemia-reperfusion injury using a rat ovary model.Method:Thirty healthy female Wistar rats with 250g were randomized into five experimental groups (n = 6): Group SHAM: The rats underwent only laparotomy. Group Ischemia: A 3- hour ischemia only. Group I/R: A 3-hour ischemia and a 3-hour reperfusion. 30 min before termination of reperfusion 20 µL soybeen oil (Solvent of PQQ) was administered. Group I/PQQ: A 3-hour ischemia only and 20 µL (10 mg/kg) intraperitoneal administration (IP) of PQQ 2.5 hours after induction of ischemia. Group I/R/PQQ: A 3-hour ischemia, a 3-hour reperfusion and 20 µL (10 mg/kg) IP of PQQ 2.5 hours after induction of ischemia. Results:Animals treated with PQQ showed significantly ameliorated development of ischemia and reperfusion tissue injury compared to those of other groups (p=0.001). The significant higher values of SOD, GPO and GST were observed in I/R/PQQ animals compared to those of other groups (p=0.001). Damage indicator (MDA) was significantly lower in I/R/PQQ animal compared to those of other groups (p=0.001). Conclusion:Intraperitoneal administration of PQQ could be helpful in minimizing ischemia-reperfusion injury in ovarian tissue exposed to ischemia.

Protective effects of vitamin D on ischemia-reperfusion injury of the ovary in a rat model.

Objective(s):The aim of the present study is to investigate probable acute effects of vitamin D on ischemia-reperfusion injury in the rat ovary.Materials and Methods:A group of 30 Wistar albino rats was divided into five groups of 6 each. Group 1: underwent laparotomy only and the ovaries were removed. Group 2: 3-hr ischemia followed by excision of the ovaries. Group 3: 3-hr ischemia and 3-hr reperfusion and the ovaries were removed. Group 4: vitamin D was administered 30 min prior to the 3-hr of ischemia and the ovaries were excised at the end of ischemia period. Group 5: vitamin D was administered 30 min prior to the 3-hr of ischemia and 3-hr reperfusion then the ovaries were removed at the end of reperfusion. The ovaries excised in each group also underwent biochemical and histopathologic analysis. MDA (malondialdehyde), SOD (superoxide dismutase), NO (nitric oxide), TAS (total antioxidant score), TOS (total oxidant score) were analyzed as biochemical parameters.Results:There were no significant differences between groups in TAS, TOS, or OSI (P>0.05). MDA levels were lower in the vitamin D treatment groups especially in group 5, significantly (P<0.05). In the histopathologic evaluation, we established that an improvement with vitamin D treatment. According to tissue injury scores, vascular congestion score was significantly different between group 3 and 5 (P<0.05).Conclusion:Vitamin D seems an effective molecule for protection of ischemia-reperfusion injury in rat ovary. There is some significant improvement in oxidative damages with vitamin D treatment.

The Protective Effects of Glycyrrhetinic Acid and Chrysin against Ischemia-Reperfusion Injury in Rat Ovaries

Objective To evaluate the protective effects of glycyrrhetinic acid (GA) and chrysin (CH) on experimental ischemia-reperfusion (I/R) injury in rat ovaries using tissue oxidative stress marker levels, hormone levels, and histopathological scores. Methods Sixty healthy rats were randomly divided into six equal groups: control, I/R, I/R + CH (50 mg/kg/day), I/R + GA (100 mg/kg/day), CH (50 mg/kg/day), and GA (100 mg/kg/day). Biochemical, hormonal, and histopathological evaluations were performed on blood and tissue samples 14 days after CH and GA treatment. Results The antioxidant defense system parameters were significantly higher in the ovarian tissues of the I/R + CH and I/R + GA groups than in those of the I/R group. Serum follicle-stimulating hormone levels were significantly reduced, and serum anti-Müllerian hormone levels were significantly increased in rats treated with CH and GA compared with those in the I/R group. Additionally, the histopathological scores of the I/R + CH and I/R + GA groups were significantly improved compared with those of the I/R group. Conclusions The significant improvements in tissue oxidative stress parameters, serum hormone levels, and histological scores observed in this study indicate that treatment with CH or GA may be a conservative approach to prevent I/R injury in adnexal torsion cases after the ovarian detorsion procedure.

Octreotide protects ovary against ischemia-reperfusion injury in rats: Evaluation of histological and biochemical parameters.

This study investigated the efficacy of octreotide for prevention of ischemia-reperfusion injury in rat ovary. Thirty-two adult female rats were included. Rats were divided into five groups: in the sham group, the abdominal wall was only opened and closed; in the torsion group, ischemia was induced for 3 h using a torsion model involving atraumatic vascular clips; in the torsion/octreotide group, rats were given 100 µg/kg i.p. octreotide 30 min before torsion was induced; in the torsion/detorsion group, rats underwent 3 h ischemia-3 h reperfusion; in the torsion/detorsion/octreotide group, rats underwent 3 h ischemia followed by 100 µg/kg octreotide i.p. 30 min prior to 3 h reperfusion. Ovarian tissue damage was scored on histopathology. Ovarian tissue malondialdehyde and plasma pentraxin 3 were measured biochemically. In comparison with the sham group, both the torsion and torsion/detorsion groups had significantly higher scores for follicular degeneration, vascular congestion, edema, hemorrhage and leukocyte infiltration. Octreotide significantly decreased these scores in both groups. Ovarian malondialdehyde and plasma pentraxin 3 were significantly higher both in the torsion and torsion/detorsion groups compared with the sham group. Octreotide also decreased these levels significantly both in the torsion/octreotide and torsion/detorsion/octreotide groups. Octreotide ameliorated the potential side-effects of ovarian ischemia-reperfusion injury in a rat model.

Sildenafil Reduces Ischemia-Reperfusion Injury in Rat Ovary: Biochemical and Histopathological Evaluation

Background/Aims: To evaluate the effects of sildenafil on antioxidant enzyme activities, lipid peroxidation and histopathological changes in ovarian tissue after ischemia-reperfusion (I/R) injury in a rat model. Methods: A total of 18 adult female Wistar albino rats weighing 200-250 g were studied as follows: (1) control group: sham operation, (2) I/R group: 3 h of reperfusion after 3 h of ischemia and (3) I/R + sildenafil group: 3 h of reperfusion after 3 h of ischemia; half an hour before reperfusion, sildenafil (1.4 mg·kg^-1) was given by oral gavage. At the end of the reperfusion periods, the ovarian tissues were removed for histopathological examination and to determine malondialdehyde (MDA) levels and glutathione peroxidase, myeloperoxidase (MPO) and superoxide dismutase (SOD) activities. Results: The I/R group had higher ovarian tissue MDA levels than the control group and the IR + sildenafil group (p = 0.016 and p = 0.044, respectively). MPO activity was lower in the IR + sildenafil group compared with the I/R group (p = 0.022). SOD activity was lower in the I/R group compared with the control group and the I/R + sildenafil group (p = 0.030 and p = 0.015, respectively). The I/R + sildenafil group had improved histological appearance which was not different to the control group (p > 0.05). Conclusion: The biochemical and histopathological results of this experimental study demonstrated that I/R injury in the ovary is ameliorated by sildenafil treatment.

The protective effect of curcumin on ischemia-reperfusion injury in rat ovary

BackgroundTo evaluate the protective effects of curcumin in experimental ischemia and ischemia/reperfusion (I/R) injury of rat ovaries. MethodsForty-eight female adult Wistar Albino rats were used. Rats divided into six groups and designed: Sham, Torsion, Detorsion, Sham + Curcumin, Torsion + Curcumin, and Detorsion + Curcumin. Except for the Sham and Sham + Curcumin group, all groups were performed to bilateral adnexal torsion for 3 h. Bilateral adnexal detorsion was implemented in the Detorsion and Detorsion + Curcumin groups. The injection of curcumin was intraperitoneally achieved 30 min before the sham, torsion and detorsion. ResultsTotal oxidant status levels (TOS), oxidative stress index (OSI) and histologic scores values of ovarian tissue were higher in the torsion and detorsion groups than the sham group (p < 0.05). There was a strong correlation between the total histologic scores of I/R injury and the OSI (r = 0.809, p < 0.001). By the use of curcumin, a significant decrease was established in the mean levels of oxidant markers and histopathologic scores of the ovarian tissues. ConclusionsAdministration of curcumin is effective in reversing tissue damage induced by ischemia-reperfusion injury in ovarian torsion.

Protective effects of montelukast on ischemia-reperfusion injury in rat ovaries subjected to torsion and detorsion: biochemical and histopathologic evaluation

To reveal the effects of montelukast as an antioxidant and tissue protective agent and study the biochemical and histopathologic changes in experimental ischemia and ischemia-reperfusion (I/R) injury in rat ovaries. Experimental study. Experimental surgery laboratory in a university department. Forty-eight rats with experimentally induced ovarian torsion. Group 1: sham; Group 2: ovarian ischemia; Group 3: a 30-hour period of ischemia followed by a 3-hour reperfusion. Groups 4 and 5: rats administered 10 and 20 mg/kg doses of montelukast before a half-hour of ischemia, then ovarian ischemia applied; after a 3-hour period of ischemia, the bilateral ovaries removed. Groups 6 and 7: 3-hour period of ovarian ischemia applied, then 2.5 hours after the ischemia induction, rats given montelukast. Group 8: sham operation and 20 mg/kg of montelukast; at the end of a 3-hour period of ischemia, 3-hours of reperfusion continued. Measurement of ovarian tissue concentrations of superoxide dismutase (SOD), glutathione (GSH), lipid peroxidation (LPO) and myeloperoxidase (MPO) activity; and histopathologic examination of all ovarian rat tissue. Montelukast treatment normalized changes of LPO and MPO and stimulated an overproduction of endogenous SOD and GSH. The results of the histologic parameters showed that treatment with montelukast in the I/R group of rats ameliorated the development of ischemia and reperfusion tissue injury. Montelukast at different doses attenuates ovarian I/R-induced ovary tissue injury in rats.

The protective effect of erythropoietin and dimethylsulfoxide on ischemia-reperfusion injury in rat ovary

Objectives The aim of this study was to investigate the effects of erythropoietin and dimethylsulfoxide in the recovery from ischemia-reperfusion injury in an experimental rat adnexal torsion model. Study design Thirty-six Wistar-albino rats were divided into six groups. Except for the sham operation group, all groups were subjected to left unilateral adnexal torsion for 3 h. Erythropoietin and dimethylsulfoxide were intraperitoneally administered 30 min before the detorsion operation. Malondialdehyde and nitric oxide levels were detected from both the plasma and the tissue samples. The sections of the tissues were evaluated histologically. The results were analyzed by a one-way analysis of the variance (ANOVA) followed by the Duncan test for multiple comparisons using computer software, SPSS Version 15.0 for Windows. Results This study demonstrated that dimethylsulfoxide and erythropoietin pretreatment attenuated ischemia-reperfusion-induced lipid peroxidation, prevented post-ischemic ovarian injury and helped to maintain the ovarian morphology. Malondialdehyde levels of plasma and ovary were higher in the torsion and detorsion groups than the sham group. This showed that ischemia-reperfusion had caused lipid peroxidation of the ovarian tissue, thus leading to oxidative damage. One of the major findings of this study is that malondialdehyde was significantly decreased in the plasma of rats who were pre-treated with dimethylsulfoxide and erythropoietin before detorsion. This suggests that dimethylsulfoxide and erythropoietin might prevent oxidative damage in ovarian ischemia-reperfusion injury. Histological examination confirmed that reperfusion caused more detrimental effects than only ischemia, which could be at least partially prevented by dimethylsulfoxide and erythropoietin administration prior to detorsion. Conclusion Erythropoietin and dimethylsulfoxide may have beneficial effects in ischemia-reperfusion injury in ovarian torsion.

The protective effect of caffeic acid phenethyl ester on ischemia-reperfusion injury in rat ovary

Objective: This experimental study was designed to determine the changes in tissue levels of malondialdehyde, end-product of lipid peroxidation (MDA), reduced glutathione (GSH) and xanthine oxidase (XO) and the effect of caffeic acid (3,4-dihydroxycinnamic acid) phenethyl ester (CAPE) on these metabolite levels after adnexal torsion–detorsion model in rats. Method: Forty adult female albino rats were divided into five groups: basal control ( n = 8), sham operation ( n = 8), torsion–detorsion plus saline ( n = 8), torsion–detorsion plus CAPE ( n = 8). and only torsion ( n = 8). Rats in the sham operation group underwent a surgical procedure similar to the other groups but the adnexa was not torsioned. Rats in the torsion group were killed after 360° clockwise adnexal torsion for 3 h and ovaries were harvested. CAPE was injected intraperitoneally 30 min before detorsion in the CAPE/detorsion group and saline was administered in the saline/detorsion group. After 3 h of adnexal detorsion, the rats in both groups were killed and adnexa were surgically removed. Results: MDA levels and XO activities in torsion–detorsion plus saline group increased significantly when compared to basal control, torsion and sham operation groups ( P < 0.001). In the CAPE group, MDA levels and XO activities were lower than those of torsion–detorsion plus saline group, and differences between the two groups were statistically significant ( P < 0.001). GSH levels in torsion–detorsion plus saline group were decreased significantly when compared to basal control and sham operation groups ( P < 0.001). GSH levels in the CAPE group were higher than those of torsion–detorsion plus saline group, and differences between the two groups were statistically significant ( P < 0.004). Morphologically, polymorphonuclear leukocytic infiltration and vascular dilatation were obvious in the ischemia-reperfusion damaged ovary, a change partially reversed by CAPE. Conclusions: These results suggest that administration of CAPE has beneficial effects in the prevention of ischemia-reperfusion injury of the ovaries.