The efficiency of oxerutin on apoptosis and kidney function in rats with renal ischemia reperfusion injury.

BACKGROUND: Background: Renal ischemia-reperfusion injury (RIRI) is the most frequent cause of acute renal failure in clinical conditions such as trauma and shock as well as renal surgeries. Oxerutin is a member of the flavonoid family and possesses antioxidant properties. The aim of this study was to investigate whether oxerutin has protective effects on RIRI. METHODS: Twenty-eight male Wistar albino rats were randomly divided into three groups: sham control group (n=8), RIRI group (n=10), and RIRI + oxerutin group (n=10). RIRI was achieved by clamping the left renal artery for 30 min, followed 1-h reperfusion period. Thereafter, blood samples and left kidney tissue samples were taken for histopathological and biochemical examination. Blood urea nitrogen (BUN), urea, creatinine, and cystatin C levels, which are indicators of kidney function, as well as tumor necrosis factor-alpha, which is an indicator of inflammation were analyzed in blood samples. Total antioxidant status and total oxidant status (TOS), which are indicators of oxidative stress were analyzed on renal tissues. The apoptotic index, an indicator of kidney damage, as well as histopathological changes were evaluated on renal tissues. RESULTS: The apoptotic index, TOS, tumor necrosis factor-alpha, BUN, and urea levels were lower in the RIRI + oxerutin group than in the RIRI group (p<0.05). The results demonstrated that the histopathological and biochemical properties of oxerutin protected rats from RIRI. CONCLUSION: The findings obtained in this study show that prophylactic administration of oxerutin has protective effects on apoptosis and renal failure caused by RIRI. Therefore, oxerutin can be used as an effective prophylactic agent in the treatment of RIRI.

Antioxidant effects of melatonin in heart tissue after induction of experimental periodontitis in rats.

The aim of this study was to evaluate the effects of melatonin on the oxidative stress in heart tissues after induction of experimental periodontitis in rats. Thirty Wistar Albino male rats were divided into four groups as follows: healthy + saline solution (Hs, n = 7), healthy + melatonin (Hm, n = 7), periodontitis + saline solution (Ps, n = 8), and periodontitis + melatonin (Pm, n = 8). Experimental periodontitis was induced using a ligature placed at the gingival margin of the maxillary second molars. Melatonin was applied intraperitoneally (10 mg/kg) every day for 2 weeks. After sacrificing the rats, serum levels of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) levels, and melatonin levels were evaluated. The Pm group exhibited lower alveolar bone loss than the Ps group. Melatonin levels increased in the periodontitis groups, and the Pm group had lower MDA levels and higher GSH-Px levels than the Ps group. These findings suggest that melatonin administration reduces MDA and increases GSH-Px levels in heart tissue, and these effects may be due to its antioxidant properties. Further studies are needed to understand the effects of melatonin on the association between periodontitis and cardiovascular disease.

Chromosomal aberrations in benign prostatic hyperplasia patients.

PURPOSE: To investigate the chromosomal changes in patients with benign prostatic hyperplasia (BPH). MATERIALS AND METHODS: A total of 54 patients diagnosed with clinical BPH underwent transurethral prostate resection to address their primary urological problem. All patients were evaluated by use of a comprehensive medical history and rectal digital examination. The preoperative evaluation also included serum prostate-specific antigen (PSA) measurement and ultrasonographic measurement of prostate volume. Prostate cancer was detected in one patient, who was then excluded from the study. We performed conventional cytogenetic analyses of short-term cultures of 53 peripheral blood samples obtained from the BPH patients. RESULTS: The mean (±standard deviation) age of the 53 patients was 67.8±9.4 years. The mean PSA value of the patients was 5.8±7.0 ng/mL. The mean prostate volume was 53.6±22.9 mL. Chromosomal abnormalities were noted in 5 of the 53 cases (9.4%). Loss of the Y chromosome was the most frequent chromosomal abnormality and was observed in three patients (5.7%). There was no statistically significant relationship among age, PSA, prostate volume, and chromosomal changes. CONCLUSIONS: Loss of the Y chromosome was the main chromosomal abnormality found in our study. However, this coexistence did not reach a significant level. Our study concluded that loss of the Y chromosome cannot be considered relevant for the diagnosis of BPH as it is for prostate cancer. Because BPH usually occurs in aging men, loss of the Y chromosome in BPH patients may instead be related to the aging process.

Effects of long-term pre- and post-natal exposure to 2.45 GHz wireless devices on developing male rat kidney.

PURPOSE: The aim of the present study was to investigate oxidative stress and apoptosis in kidney tissues of male Wistar rats that pre- and postnatally exposed to wireless electromagnetic field (EMF) with an internet frequency of 2.45 GHz for a long time. METHODS: The study was conducted in three groups of rats which were pre-natal, post-natal. and sham exposed groups. Oxidative stress markers and histological evaluation of kidney tissues were studied. RESULTS: Renal tissue malondialdehyde (MDA) and total oxidant (TOS) levels of pre-natal group were high and total antioxidant (TAS) and superoxide dismutase (SOD) levels were low. Spot urine NAG/creatinine ratio was significantly higher in pre- and post-natal groups (p < 0.001). Tubular injury was detected in most of the specimens in post-natal groups. Immunohistochemical analysis showed low-intensity staining with Bax in cortex, high-intensity staining with Bcl-2 in cortical and medullar areas of pre-natal group (p values, 0.000, 0.002, 0.000, respectively) when compared with sham group. Bcl2/Bax staining intensity ratios of medullar and cortical area was higher in pre-natal group than sham group (p = 0.018, p = 0.011). CONCLUSION: Based on this study, it is thought that chronic pre- and post-natal period exposure to wireless internet frequency of EMF may cause chronic kidney damages; staying away from EMF source in especially pregnancy and early childhood period may reduce negative effects of exposure on kidney.

Manganese superoxide dismutase, glutathione peroxidase and catalase gene polymorphisms and clinical outcomes in acute kidney injury.

INTRODUCTION: The aim of this study was to evaluate the potential association of single gene polymorphisms of manganese superoxide dismutase (MnSOD), glutathione peroxidase 1 (GPX1) and catalase (CAT) with clinical outcomes of acute kidney injury (AKI). MATERIALS AND METHODS: Ninety AKI patients and 101 healthy volunteers were included in the study. Determination of MnSOD rs4880, GPX1 rs1050450 and CAT rs769217 polymorphisms was performed using real-time polymerase chain reaction amplification. The duration of hospitalization of AKI patients, dialysis and intensive care requirements, sepsis, oliguria and in-hospital mortality rates were assessed. RESULTS: The MnSOD, GPX1 and CAT genotypes and allele frequencies of AKI patients did not differ significantly from those of healthy controls. In patients with a T allele in the ninth exon of the CAT gene, intensive care requirements were greater than those of patients with the CC genotype (p = 0.04). In addition, sepsis and in-hospital mortality were observed significantly more frequently in patients with a T allele in the ninth exon of the CAT gene (p = 0.03). Logistic regression analysis determined that bearing a T allele was the primary determinant of intensive care requirements and in-hospital mortality, independent of patient age, gender, presence of diabetes and dialysis requirements (OR 6.10, 95% CI 1.34-27.81, p = 0.02 and OR 10.25, 95% CI 1.13-92.80, p = 0.04, respectively). CONCLUSION: Among AKI patients in the Turkish population, hospital morbidity and mortality were found to be more frequent in patients bearing a T allele of the rs769217 polymorphism of the CAT gene.

The prophylactic effect of Viscum album in streptozotocin-induced diabetic rats.

OBJECTIVE: Viscum album (VA) is a species of mistletoe in the family Santalaceae that is thought to have therapeutic properties for several diseases, including diabetes. In the present study, conventional experimental rat model was used with diabetes induced with streptozotocin (STZ) to evaluate effect of VA on lipid peroxidation and antioxidant system. METHODS: Total of 32 adult, male Sprague-Dawley rats were divided into 4 groups of 8 rats: Control group, STZ group, VA group, and group administered VA+STZ. VA extract was 100 mg/kg preparation delivered once a day by oral gavage for 10 days. Single dose of 55 mg/kg STZ citrate buffer (0.1 M, pH 4.5) was administered intraperitoneally to induce diabetes. Fasting blood glucose level was measured and recorded. Animals were sacrificed, and catalase (CAT), malondialdehyde (MDA), and protein present in liver and kidney tissue samples were measured. Activity of CAT, an antioxidant enzyme, was studied according to the Aebi method. MDA, a product of lipid peroxidation, was analyzed using Draper and Hadley spectrophotometric procedure. Protein level was determined using supernatant and extract of tissue homogenates according to Lowry method. Data were assessed using one-way analysis of variance and pairwise comparisons between groups. Post-hoc analysis included Dunnet test, Duncan test, and least significant difference test. P<0.05 was considered significant probability value. RESULTS: Oxidative stress is associated with diabetic complications. VA administered to diabetic rats reduced oxidative stress and improved their general condition. CONCLUSION: Further studies are needed to enhance understanding of potential antidiabetic and antioxidant effects of VA.

Genetic Polymorphism of Manganese Superoxide Dismutase in Behçet's Disease.

OBJECTIVES: This study aims to investigate the genetic association between single nucleotide mutation in mitochondrial manganese superoxide dismutase and a Behçet's disease (BD) population by using molecular techniques. PATIENTS AND METHODS: Ninety-three BD patients (45 males, 48 females; mean age 33.15±8.99 years; range 17 to 65 years) and 125 controls (58 males, 67 females; mean age 28.33±7.31 years; range 18 to 62 years) were genotyped by polymerase chain reaction-restriction fragment length polymorphism method. The genotypic distributions in BD patients and controls were consistent with the Hardy-Weinberg equilibrium. RESULTS: Significant differences were observed between BD patients and controls in terms of genotypic distribution. Frequencies of alanine (Ala)/Ala, Ala/valine (Val), and Val/Val were 14.0% (n=13), 45.2% (n=42), and 40.9% (n=38) in BD patients and 21.6% (n=27), 53.6% (n=67), and 24.8% (n=31) in controls, respectively (p=0.033). CONCLUSION: The Val/Val genotype of the manganese superoxide dismutase gene is associated with the physiopathology of BD in a group of Turkish patients.

Protective effect of theophylline on renal functions in experimental pneumoperitoneum model.

Our objective in this experimental study is to research the effect of the intra-abdominal pressure which rises following pneumoperitoneum and whether Theophylline has a possible protective activity on this situation. In our study, 24 Wistar Albino rats were used. Rats were divided into two groups. The first group was set for only pneumoperitoneum model. The second group was given 15 mg/kg of Theophylline intraperitoneally before setting pneumoperitoneum model. Then urea, creatinine, cystatin-C, tissue and serum total antioxidant capacity, total oxidant capacity and oxidative stress index in two groups were measured and compared with each other. Apoptosis and histopathological conditions in the renal tissues were examined. The differences between the groups were analyzed with the Mann-Whitney U test. Results were considered significant at p < 0.05. No statistically significant difference was determined between tissue and serum averages in two groups in terms of TAS, TOS and OSI values (p > 0.05). The mean value of urea were similar in pneumoperitoneum and pneumoperitoneum + theophylline groups (p = 0.12). The mean cystatin-C value was 2.2 ± 0.3 µg/mL in pneumoperitoneum, 1.74 ± 0.33 µg/mL in pneumoperitoneum + theophylline (p = 0.002). According to our study, lower cystatin-C levels in the group, where Theophylline was given, are suggestive of lower renal injury in this group. However, this opinion is interrogated as there is no difference in terms of tissue and serum TAS, TOS, OSI and urea values between the groups.

Protective effects of erdosteine, vitamin E, and vitamin C on renal injury induced by the ischemia-reperfusion of the hind limbs in rats.

BACKGROUND/AIM: To compare the protective efficacy of erdosteine and vitamins C and E against renal injury caused by hind limb ischemia-reperfusion (I/R). MATERIALS AND METHODS: Rats were split into 4 groups: group I as the control, group II as I/R, group III as I/R + erdosteine, and group IV as I/R + vitamins C and E. Superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) activities and malondialdehyde (MDA) tissue levels were determined. RESULTS: MDA levels were found comparable with the control group in groups II and III. However, they were considerably decreased in group IV when compared to group II (P < 0.01). Additionally, SOD, CAT, and GSH-Px activities were considerably (P < 0.05) decreased in group II. While CAT and GSH-Px activities were restored (P <0.01) by vitamin E and C treatment, SOD activity was not significantly affected. While GSH-Px activities were higher (P < 0.05) with erdosteine administration, SOD and CAT activities were unchanged. CONCLUSION: The protective effect of vitamins C and E is higher than that of erdosteine treatment in reducing the oxidative stress after renal ischemia in this animal model.

The Polymorphisms of Ser49Gly and Gly389Arg in Beta-1-Adrenergic Receptor Gene in Major Depression.

INTRODUCTION: It was reported that the genetic susceptibility of major depressive disorder (MDD) is related with genetic polymorphisms. The aim of this study was to investigate the possible association of the genotype and allele frequencies of Ser49Gly and Arg389Gly polymorphisms in MDD by comparing them with healthy subjects. METHODS: A total of 144 patients with MDD diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) criteria and 105 healthy controls were included in the study. Polymerase chain reaction (PCR) with restriction fragment length polymorphism (RFLP) was used for genotyping. RESULTS: Of the 144 participants in the MDD group, 77 (53.5%) had homozygous wild type (AA), 57 (39.6%) had heterozygous type (AG), and 10 (6.9%) had mutant (GG) genotype for Ser49Gly, whereas 75 (52.1%) had homozygous wild type (GG), 59 (41.0%) had heterozygous (GC) type, and 10 (6.9%) had mutant homozygous (CC) genotype for Gly386Arg. There were no significant difference in the allele and genotype frequencies of the beta-1-adrenergic receptor (ADRB1) gene for Ser49Gly and Arg389Gly polymorphisms after comparing with healthy controls (p=0.626; p=0.863 and p=0.625; p=0.914). CONCLUSION: The results of our study did not reveal a major effect of the polymorphism of Ser49Gly and Gly389Arg in the ADRB1 gene in MDD. Further studies with larger sample size are required to elucidate the role of other beta-1 adrenergic gene polymorphisms in MDD.

Caffeic acid phenethyl ester protects against amphotericin B induced nephrotoxicity in rat model.

The present study was conducted to investigate whether caffeic acid phenethyl ester (CAPE), an active component of propolis extract, has a protective effect on amphotericin B induced nephrotoxicity in rat models. Male Wistar-Albino rats were randomly divided into four groups: (I) control group (n = 10), (II) CAPE group (n = 9) which received 10 µmol/kg CAPE intraperitoneally (i.p.), (III) amphotericin B group (n = 7) which received one dose of 50 mg/kg amphotericin B, and (IV) amphotericin B plus CAPE group (n = 7) which received 10 µmol/kg CAPE i.p. and one dose of 50 mg/kg amphotericin B. The left kidney was evaluated histopathologically for nephrotoxicity. Levels of malondialdehyde (MDA), nitric oxide (NO), enzyme activities including catalase (CAT), and superoxide dismutase (SOD) were measured in the right kidney. Histopathological damage was prominent in the amphotericin B group compared to controls, and the severity of damage was lowered by CAPE administration. The activity of SOD, MDA, and NO levels increased and catalase activity decreased in the amphotericin B group compared to the control group (P = 0.0001, P = 0.003, P = 0.0001, and P = 0.0001, resp.). Amphotericin B plus CAPE treatment caused a significant decrease in MDA, NO levels, and SOD activity (P = 0.04, P = 0.02, and P = 0.0001, resp.) and caused an increase in CAT activity compared with amphotericin B treatment alone (P = 0.005). CAPE treatment seems to be an effective adjuvant agent for the prevention of amphotericin B nephrotoxicity in rat models.

The role of carnitine in preventing renal damage developed as a result of infrarenal aortic ischemia-reperfusion.

BACKGROUND: This study was designed to use carnitine for preventing deposition of end products of lipid peroxidation in rat models in the prevention of ischemia-reperfusion (IR) damage frequently seen following operations of infrarenal abdominal aorta (AA). METHODS: Forty male rats of Sprague-Dawley type were evenly (n = 8) randomized to five groups: sham laparotomy (SHAM), carnitine control (CC), aortic IR (AIR), AIR + low-dose carnitine (AIR+LDC), and AIR + high-dose carnitine (AIR+HDC). RESULTS: Compared to other groups, serum creatinine levels of AIR group were significantly higher. Also tissue malondialdehyde (MDA) levels of AIR group were significantly higher compared to SHAM, CC, and AIR+HDC groups. In histopathological examination, although tubular necrosis atrophy and tubular degeneration observed in AIR group showed regression with low-dose carnitine, tubular necrosis atrophy, tubular degeneration, glomerular damage, and vascular congestion thrombosis decreased with high-dose carnitine. Total score of histological damage was significantly higher in AIR, AIR+LDC, and AIR+HDC groups compared to SHAM and CC groups. Moreover, total score of histological damage was significantly lower in AIR+HDC group than AIR+LDC group. CONCLUSIONS: In this study, we showed carnitine can partially prevent renal damage in infrarenal AIR models of rats. This result may open new prospects to us in the prevention of renal IR damage during surgery of aorta.

Lisinopril attenuates renal oxidative injury in L-NAME-induced hypertensive rats.

Hypertension and related oxidative stress are involved in the pathogenesis of any renal diseases. Angiotensin-converting enzyme inhibitors have multi-directional renoprotective effects. In this study, we aimed to investigate whether lisinopril treatment has any biochemical alterations on renal tissue in L-NAME (Nε-nitro-L-arginine methyl ester) induced hypertension model. Twenty-eight Sprague-Dawley rats were included in this study and divided into four equal groups (n = 7): control group, L-NAME treated group (75 mg/kg/day), L-NAME plus lisinopril treated group and only lisinopril treated group (10 mg/kg/day). L-NAME and lisinopril were continued for 6 weeks. Systolic blood pressures were measured by using tail cuff method. In biochemical analysis, malondialdehyde (MDA, an index of lipid peroxidation) levels, the activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) in renal tissues were used as markers of oxidative stress-induced renal impairment. Microalbumin and N-acetyl-ß-D-glucosaminidase (NAG) in urine were determined as markers of renal tubular damage related to hypertension. Chronic L-NAME administration resulted in a significant depletion of serum nitric oxide (NO). When compared with control group, serum creatinine, microalbumin, urine NAG, renal tissue MDA level, and CAT activities were significantly high, while renal tissue SOD and GSH-Px activities low in L-NAME group. In the L-NAME plus lisinopril treated group, serum creatinine, microalbumin and urine NAG, renal MDA level and CAT activity decreased, whereas SOD, GSH-Px activities in renal tissue and serum NO levels were increased. Thus, lisinopril treatment reversed these effects. There were not any significant difference between L-NAME plus lisinopril treated group and control group concerning serum creatinine, renal tissue MDA level and SOD, GSH-Px, CAT activities. These results suggest that lisinopril could diminish biochemical alterations in L: -NAME induced hypertensive renal damage that occurs by oxidative stress.

Anticlastogenic effect of caffeic acid phenethyl ester on cisplatin-induced chromosome aberrations in rat bone marrow cells.

Caffeic acid phenethyl ester (CAPE) is an antioxidant that can scavenge free radicals and protect cellular macromolecules, including DNA and proteins, from oxidative damage induced by various agents. The protective effect of CAPE on cisplatin-induced chromosome aberrations has been determined in rat bone marrow cells. The animals were pretreated with a single dose of CAPE (10 micromol/kg body weight [b.w.]) injected intraperitoneally (i.p.) 24 hours before the administration of cisplatin and then sacrificed 24 hours after the cisplatin administration. Cisplatin was administered to rats either alone (5 mg/kg b.w., i.p.) or after CAPE treatment. CAPE has led to a statistically significant decrease in the total number of chromosomal aberrations and abnormal metaphases induced by cisplatin when compared with only cisplatin given groups. We have concluded that CAPE could prevent cisplatin-induced chromosome aberrations by establishing a potent free radical scavenger effect.

Erdosteine modulates radiocontrast-induced hepatotoxicity in rat.

It has been suggested that reactive oxygen species (ROS) plays an important role in radio contrast media (RCM)-induced ischemia reperfusion tissue injury although antioxidants may have protective effects on the injury. We investigated the effects of erdosteine as an antioxidant agent on RCM-induced liver toxicity in rats by evaluation of lipid peroxidation (as TBARS), catalase (CAT), superoxide dismutase (SOD), reduced glutathione (GSH) and glutathione peroxidase (GSH-Px) values and histological evaluation. Twenty-one rats were equally divided into three groups as follows: control, RCM, and RCM plus erdosteine. RCM was intraperitoneally administered for 1 day. Erdosteine was administered orally for 2 days after RCM administration. Liver samples were taken from the rats and they homogenized in a motor-driven tissue homogenizer. TBARS levels were significantly (p < 0.005) higher in RCM group than in control although SOD activities significantly (p < 0.05) decreased in RCM group. TBARS levels were lower in RCM plus erdosteine group than in control although SOD activity and GSH level increased (p < 0.05) in liver as compared to RCM alone. Erdosteine showed also histopathological protection (p < 0.0001) against RCM induced hepatotoxicity. GSH-Px and CAT activities were not statistically changed by the erdosteine. According to our results, it can be concluded that radiocontrast media can induce oxidative stress in liver as suggested by previous studies. Erdosteine seems to be protective agent on the radiocontrast media-induced liver toxicity by inhibiting the production of ROS via the enzymatic antioxidant system.

The neuroprotective effect of fish n-3 fatty acids in the hippocampus of diabetic rats.

INTRODUCTION: Diabetes mellitus may lead to functional and structural changes in the brain. Fish oil is a rich source of n-3 essential fatty acids (EFA) such as eicosapentaenoic and docosahexoenoic acids. We examined the neuroprotective effects of fish n-3 EFA in the hippocampus of diabetic rats. MATERIALS AND METHODS: Nineteen adult male rats were divided into three groups. Group I (control; n = 6) was fed a normal rat diet. Group II (diabetic; n = 6) was fed a normal rat diet and streptozotocin (STZ) was administered to induce diabetes mellitus. Group III (n-3 + diabetic; n = 7) was fed a normal rat diet and fish n-3 EFA (Marincap, 0.4 g/kg/day) for 8 weeks and STZ was administered to induce diabetes mellitus. The levels of malondialdehyde (MDA) and activities of superoxide dismutase (SOD) and catalase (CAT) were measured in the left hippocampus after the animals were sacrificed. The right hemisphere was completely blocked. The sections were stained with Cresyl Violet and apoptotic neurons were counted in the hippocampus. RESULTS: The levels of MDA and activities of SOD and CAT increased in diabetic rats compared to control rats. However, the levels of MDA and activities of SOD and CAT decreased in n-3 + diabetic rats compared to diabetic rats. Also, the number of apoptotic neurons increased in diabetic rats compared to control rats and decreased in n-3 + diabetic rats compared to diabetic rats. CONCLUSIONS: Fish n-3 EFA reduces oxidative stress and induces apoptotic changes in the hippocampus of STZ-diabetic rats. The addition of fish n-3 EFA to diets may be useful to prevent functional and structural changes to cerebral centers due to diabetes mellitus.

Nigella sativa oil for prevention of chronic cyclosporine nephrotoxicity: an experimental model.

Nephrotoxicity is the main secondary effect of cyclosporine A (CsA) treatment. The antioxidant action of Nigella sativa oil (NSO) may explain the protective effect of these agents against various hepatotoxic and nephrotoxic models in vivo and in vitro. This study was designed to investigate the possible protective effects of NSO, in prevention of chronic CsA-induced nephrotoxicity in rats. Animals were randomly divided into four experimental groups: the control group received sunflower oil, the other groups were treated with CsA (25 mg/kg/day b.w. orally) or NSO (2 ml/kg orally) or CsA + NSO, respectively. Urine and serum creatinine levels, tissue superoxide dismutase, glutathione peroxidase and catalase enzyme activities, and nitric oxide and malondialdehyde levels were measured, and histological examination was performed. In our study, CsA caused a significant deterioration in the renal function, morphology and gave rise to severe oxidative stress in the kidney. NSO significantly improved the functional and histological parameters and attenuated the oxidative stress induced by CsA. In conclusion, our study demonstrated for the first time that NSO protects kidney tissue against oxygen free radicals, preventing renal dysfunction and morphological abnormalities associated with chronic CsA administration.

The protective effect of N-acetylcysteine against cyclosporine A-induced hepatotoxicity in rats.

The immunosuppressive agent cyclosporine A (CsA) has been reported to exert measurable hepatotoxic effects. One of the causes leading to hepatotoxicity is thought to be reactive oxygen radical formation. The aim of this study was to investigate the effects of N-acetylcysteine (NAC) treatment on CsA-induced hepatic damage by both analysing superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), aspartate aminotransferase (AST) and alanine transaminase (ALT) activities with malondialdehyde (MDA) and nitric oxide (NO) levels, and using an histological approach. CsA administration produced a decrease in hepatic SOD activity, and co-administration of NAC with CsA resulted in an increase in SOD activity. MDA and NO levels increased in the CsA group and NAC treatment prevented those increases. A significant elevation in serum AST and ALT activities was observed in the CsA group, and when NAC and CsA were co-administered, the activities of AST and ALT were close to the control levels. CsA treatment caused evident morphological alterations. Control rats showed no abnormality in the cytoarchitecture of the hepatic parenchyma. The co-administration of NAC with CsA showed no signs of alteration and the morphological pattern was almost similar to the control group. In conclusion, CsA induced liver injury and NAC treatment prevented the toxic side effects induced by CsA administration through the antioxidant and radical scavenging effects of NAC.

The course of nitric oxide and superoxide dismutase during treatment of bipolar depressive episode.

BACKGROUND AND AIMS: Studies have already pointed out a possible pathophysiological role of oxidative and antioxidative molecules in bipolar disorder. We aimed to evaluate the activity and levels of antioxidant superoxide dismutase (SOD), and oxidant nitric oxide (NO), in bipolar I depressive episode (BD-DE) patients in a prospective design. METHOD: 30 BD-DE patients, diagnosed according to DSM IV, and 30 healthy volunteer controls were included. The serum levels of NO and SOD have been studied when admitted to hospital (1st) and on the 30th days. Clinical outcome was measured by Hamilton Depression Scale (HAM-D). The patients were allowed to have their treatments. One patient was dropped out due to insufficient sampling. RESULTS: As in the previous studies, NO 1st day levels were significantly higher in patients and SOD 1st day activity was significantly low (p<0.01). NO levels significantly decreased (p<0.01) and normalized, as SOD activity significantly increased but did not reach to the controls' levels (p<0.01) on the 30th day. CONCLUSION: Despite normalized NO levels, persistent low SOD activity might point out an oxidative imbalance in BD-DE. Chronic low SOD activity may be associated with incapacity of coping with oxidative stress. This research connotes the probable oxidative imbalance in BD-DE and discusses that phenomenon within the continuum of the disease state.

The effects of erdosteine on lung injury induced by the ischemia-reperfusion of the hind-limbs in rats.

BACKGROUND: [corrected] The goal of this experimental study was to investigate whether erdosteine has a protective effect against lung injury as a remote organ after hind-limb ischemia-reperfusion (I/R). MATERIALS AND METHODS: The rats were divided into three groups: control, I/R, and I/R + erdosteine. After the experimental procedure, nitric oxide (NO) levels, myeloperoxidase (MPO), adenosine deaminase (ADA), and the activities of xanthine oxidase (XO) were determined on the lung tissue. The levels of NO and activities of MPO were also measured on the bronchial alveolar lavage (BAL). In addition, the lung tissue was examined by histopathology. RESULTS: The lung tissue ADA and XO activities were increased in the I/R group compared with the control group (P < 0.05). In the I/R group, the levels of NO were higher than the control group (P < 0.05), whereas the erdosteine treatment did not alter the NO levels (P < 0.05). The MPO activities increased after I/R in the I/R group compared to both control and I/R + erdosteine group (P < 0.05). The activity of MPO increased in the IR group in comparison with the control group in BAL (P < 0.05). The activity of MPO in the I/R + erdosteine group was significantly lower than the I/R group in BAL (P < 0.05). NO levels increased in all I/R groups compared to control group in BAL (P < 0.05). However, treatment of erdosteine significantly decreased NO levels compared to I/R group (P < 0.05). The animals of the I/R group had total destruction of normal alveolar structure with the intense presence of infiltrating neutrophils and mononuclear phagocytes in histopathological examination. The rat lung exhibited mild degrees of destruction in the erdosteine group. CONCLUSIONS: As a result, erdosteine may be a protective effect for lung injury, decreasing oxidative stress and neutrophil accumulation after hind-limb I/R in rats.