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Objectives To explore the effect of erythromycin on glutathione hormone (GSH) and γ-glutamyl cysteine synthetase (γ-GCS) in premature newborn rats exposed to hyperoxia, to study the intervention effect of erythromycin on hype-roxia-induced lung injury. Methods One-day old preterm SD rats were randomly divided into four groups:control group, eryth-romycin group, hyperoxia group, erythromycin+hyperoxia group. Hyperoxia group and hyperoxia+erythromycin group were continuously exposed to oxygen (oxygen concentration>0.85), control group and erythromycin group were in room air. Via cau-dal vein, the preterm rats was injected with erythromycin in erythromycin group and hyperoxia+erythromycin group, sodium chloride in control group and hyperoxia group daily. After 1,7,14 day(s) of hyperoxia (or air ) exposure, the preterm SD rats of four groups were killed, whole lung of these rats were isolated and histological changes were observed by hematoxylin-eosin (HE) staining, GSH andγ-GCS of pulmonary tissue homogenate were detected by double antibody sandwich enzyme linked im-munosorbent assay. Total lung RNA was extracted andγ-GCS mRNA was detected by reverse transcription polymerase chain re-action. Results The results showed that:After 1 and 7 day(s) of exposure, the expression of GSH、γ-GCS andγ-GCS mRNA in four groups showed significant differences(P<0.05). Among them, GSH expression in erythromycin + hyperoxia group was higher than that in the other three groups in 1,7,14 day(s) of exposure with significant differences (P<0.05);GSH expression in erythromycin+hyperoxia group and hyperoxia group reached the peak after 7 days of exposure. The expression ofγ-GCS andγ-GCS mRNA in erythromycin+hyperoxia group and hyperoxia group were higher than the other two groups after 1and 7 day(s) of exposure, the expression ofγ-GCS mRNA in erythromycin+hyperoxia group were higher than that of hyperoxia group with significant differences (P<0.05). Conclusions The expressions of GSH andγ-GCS in the lung of premature SD rats were abnor-mal by oxidation outbreak. Erythromycin may increase the activity ofγ-GCS, improve the anti-oxidation ability of GSH, and al-leviate hyperoxia mediated lung injury in premature rats.
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Objective To explore the expression of glutathione hormone (GSH) and γ-glutamyl cysteine synthetase (γ-GCS) in premature newborn rats exposed to hyperoxia,and to study antioxidant role of GSH and γ-GCS in hyperoxia-induced lung injury.Methods One-day old preterm SD rats were divided randomly into 2 groups:hyperoxia group and air group.Newborn rats in hyperoxia group were continuously exposed to oxygen(oxygen ＞ 850 mL/L),and newborn rats in air group were exposed in room air.After 1,7,14 days of exposure,the preterm SD rats of 2 groups were killed,and whole lung of these rats were isolated.GSH and γ-GCS of pulmonary tissue homogenate were detected by double antibody sandwich enzyme linked immunosorbent assay (ELISA).Bicinchoninic acid (BCA) was used to detect GSH protein in lung tissue homogenate.Total lung RNA was extracted and γ-GCS mRNA was detected by reverse transcription polymerase chain reaction.Results 1.The results were detected by ELISA method and BCA method,compaired with air group,the expression of GSH protein in lung tissue induced by hyperoxia was significantly increased after 1,7 days of exposure(all P ＜ 0.05),but the expression of GSH became significantly weak after 14 days of exposure (P ＜0.05).2.The expression of γ-GCS mRNA and protein level were significantly increased in 1,7 days (all P ＜0.05),but the general tendency decreased after 14 days of exposure,the expression of γ-GCS mRNA became stronger than its expression after 14 days of air group,both were no significantly different(P ＞0.05).Conclusions The changes of GSH and γ-GCS in the lung of premature SD rats induced by oxidation outbreak participate in the development of hyperoxia-induced lung injury,the activity of γ-GCS may be increased by hyperoxia,and alleviate hyperoxia lung injury in premature rats through antioxidation of GSH.
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Objective: To investigate the effect of glutamine (Gln) on the content of reduced glutathione hormone (GSH) and aminoglutaminic acid (Glu) of spinal cord following ischemia-reperfusion injury. Methods: Totally 40 healthy adult male rabbits were randomly divided into five groups: sham-operation group (S group), ischemia-reperfusion injury group (I/R group), low-dose glutamine group (L Gln group), median-dose glutamine group (M Gln group) and high-dose glutamine group (H Gln group). After glutamine preconditioning, the model of spinal cord ischemia-reperfusion injury was established according to Zivin's method. The general status of animals was observed and the changes of Jacobs scoring were recorded in each group. Malondialdehydes (MDA), GSH, Glu and superoxide dismutase (SOD) activity in lumbar spinal cord tissues were determined using chemical colorimetry. The neuron number and deviation rate in spinal cord anterior horn were observed histopathologically. Results: There was no significant difference between L Gln group and I/R group in behavior scoring, SOD activity, content of MDA and Glu, neuron number and deviation rate of spinal cord (P>0.05); however, there was a significant difference in GSH content of spinal cord (P0.05), whereas there was a significant difference in SOD activity and Glu content (P<0.05). Conclusion: Pretreatment with medium-dose glutamine has a protective effect on spinal cord ischemia-reperfusion injury in rabbits, which may be related to the maintenance of GSH content, increase of SOD activity and reduction of MDA.
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Objective To investigate the effect of glutamine (Gln) on the content of reduced glutathione hormone (GSH) and aminoglutaminic acid (Glu) of spinal cord following ischemia-reperfusion injury. Methods Totally 40 healthy adult male rabbits were randomly divided into five groups: sham-operation group (S group), ischemia-reperfusion injury group (I/R group), low-dose glutamine group (L Gln group), median-dose glutamine group (M Gln group) and high-dose glutamine group (H Gln group). After glutamine preconditioning, the model of spinal cord ischemia-reporfasion injury was established according to Zivin's method. The general status of animals was observed and the changes of Jacobs scoring were recorded in each group. Malondialdehydes (MDA), GSH, Glu and superoxide dismutase (SOD) activity in lumbar spinal cord tissues were determined using chemical colorimetry. The neuron number and deviation rate in spinal cord anterior horn were observed histopathologically. Results There was no significant difference between L Gin group and I/R group in behavior scoring, SOD activity, content of MDA and Glu, neuron number and deviation rate of spinal cord (P>0.05); however, there was a significant difference in GSH content of spinal cord (P<0.05). M Gln group and I/R group differed significantly (P<0.05) in behavior scoring, SOD activity, content of MDA, Glu, GSH, neuron number and deviation rate of spinal cord. Between H Gln group and M Gln group, there was no significant difference in behavior scoring, content of MDA and Glu, SOD activity, neuron number and aberration rate in spinal cord (P>0.05), whereas there was a significant difference in SOD activity and Giu content (P<0.05). Conclusion Pretreatment with medium-dose glutamine has a protective effect on spinal cord ischemia-reporfasion injury in rabbits, which may be related to the maintenance of GSH content, increase of SOD activity and reduction of MDA.
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AIM:To observe the changes of hepatic fibrosis index,clinical symptom,physical sign and hepatic function after the patients were treated treatment with reduced glutathione hormone.METHODS:The 72 patients were divided into two groups that one was the treatment group with 37 patients and the other was the control group with 35 patients.The control group was accepted the treatment with Ganlixin Injection,Magnesium Aminosuccinate Injection and Mulvital,etc.The treatment group was accepted reduced glutathione hormone(1.5 g,once a day)in addition.The course of treatment lasted for 8 weeks.We observed the two groups' blood-serum fibrosis indexes(HA,LN,PIII-P,C-IV)and biochemistry indxes(TBIL,ALT,AST,GGT)before and after the treatment.RESULTS:The improvements of the treatment group were much better than the control group on the sides of clinical symptom,physical sign,hepatic function and blood-serum fibrosis.The treatment group's blood-serum fibrosis indexes were much lower after the treatment(P