Objective To observe the protective effects of Na2SeO3 on the damage of retinal neuron induced by microwave. Methods Cultured fluids of retinal neuron were divided into 4 groups,including 1 group of control, according to the concentration of Na2SeO3 in cultured fluid and then exposed to 30 mW/cm2 microwave for 1 hour.The targets of lipid peroxidation and the concentration of selenium in cells were measured.Apoptosis detection was taken by TUNEL detection kit. Results The activity of SOD and GSH-Px rised,meanwhile the content of MDA and the amount of apoptosis cells decreased in 1times;107 mol/L group compared with the group without Na2SeO3.The other groups was superior in antioxdant capacity to 1times;107 mol/L group. Conclusion Na2SeO3 might be possessed of the effect of protecting the damage of retinal neuron induced by microwave. (Chin J Ocul Fundus Dis,2000,16:97-99)
Objective To investigate the protective effect and mechanism of erythropoietin (EPO) on injury of human retinal pigment epithelial (hRPE) cell induced by hydrogen peroxide (H2O2). Methods Take subcultured hFRPE cells as study target. They were treated with 800 mu;mol/L of H2O2 for 3 hours to establish the cell injury model. The cultured cells were divided into three groups：control group, simply injury group and therapeutic group which again divided into 10 IU/ml, 20 IU/ml, 40 IU/ml,60 IU/ml subgroups according to the concentration of recombinant human erythropoietin(rhEPO). NF-kappa;B was measured by immunohistochemistry. The content of Malondialdehyde(MDA) which was the product of cellular lipid peroxidation and the releasing rate of lactate dehydrogenase（LDH）were estimated by chromatometry. Results H2O2 could elevate the level of MDA and the releasing rate of LDH, compared simply injury group with control group, the differences were significant.(tLDH＝29.746,tMDA＝20.426,Plt;0.05); Compared all of therapeutics groups with simply injury group, the releasing rate of MAD and LDH were decreased obviously, the differences were significant.（LDH t10IU＝5.770，t20IU＝12.774，t40IU＝19.818，t60IU＝24.833，Plt;0.05；MDA t10IU＝5.345，t20IU＝10.278，t40IU＝18.571，t60IU＝20.247，Plt;0.05）; The correlative analysis results of each therapeutic subgroup were: ①the concentration of rhEPO had negative correlation with the relation rate of LDH and the content of MDA(r=-0.976，P=0.024； r=-0.968，P=0.032) ; ②the concentration of rhEPO had positive correlation with the nuclear translative rate of NF-kappa;B(r=0.998，P=0.002); ③the nuclear translative rate of NF-kappa;B had negative correlation with the content of MDA(r=－0.954，P=0.046). Conclusion EPO can protect hFRPE cells from the injury of H2O2, the mechanism may be related to the activation of NF-kappa;B.
Endocrinology is closely related to lipid metabolism. Lipotoxicity affects the abnormal function of various endocrine organs, and leads to diabetes, fatty liver, metabolic syndrome and other endocrine and metabolic diseases. It is an important strategy to prevent the lipid toxicity. Endocrine disorders can also cause dyslipidemia. Studies have found that thyroid and gonadal glands play an important role in lipid metabolism. Their molecular mechanisms are gradually revealed and will be a new therapeutic target for dyslipidemia. Lipid metabolism disorders play an important role in the development of endocrine and metabolic diseases.
To investigate prospectively the short-term effect of different fat emulsions on plasma lipids and lipoproteins and to clarify the underlying mechanisms. Fifty six surgical patients were randomized to received intravenously either a 10%. Intralipid, a 20% Intralipid or no fat emulsions for 5 days postoperatively as part of a standard parenteral nutrition regimen. Serum lipids and lipoproteins were measured prior to and after the 5-day infusion period. Results: Intravenous administration of 10% Intralipid caused a marked increase of total cholesterol (Tcho), free cholesterol (Fcho), Low-density lipoprotein cholesterol (LDL-ch), phospholipid and lipoprotein X (LPX). Quantification of LPX revealed that its increase was proportionate to that of phospholipid and Tcho. Conclusion: Exogenous phospholipids when using fat emulsions with a high phospholipid/triglyceride (PL/TG) ratio play an impressive role in the formation of LPX and consequently are capable of inducing hypercholesterolemia after only a few days. Therefore, 20% Intralipid should be preferred to the corresponding 10% Intralipid for its low PL/TG ratio.
The present study was designed to elucidate the role of apoE polymorphism in the lithogenesis of cholecystolithiasis and to explore the hereditary pathogenesis of the disease. Polymerase Chain Reaction (PRC) was used as researching apoE phenotypes and allele frequencies in patients with gallstones (n=87) and in controls (n=50), and the fasting serum lipids of subjects were also measured. The characteristics of lipid variants were analysed among the patients with different apoE phenotypes. The results showed that the levels of TG (1.43mmol/L), VLDL-C(0.68mmol/L) in E2/3 patients were greatly higher than those in E2/3 controls (1.06mmol/L, Ｐ＜0.05 and 0.48mmol/L, Ｐ＜0.05), and LDL-C (1.41mmol/L) was markably lower in E2/3 patients than that in controls (2.04mmol/L, Ｐ＜0.05). The levels of serum lipids decreased significantly in E3/3 patients with HDL-C (0.89mmol/L), HDL2-C (0.49mmol/L), HDL3-C (0.39mmol/L), and compared with those in E3/3 controls (1.28mmol/L Ｐ＜0.05, 0.73mmol/L Ｐ＜0.001 and 0.55mmol/L Ｐ＜0.001). In E3/4 patients there were only slight changes of VLDL-C, LDL-C level. The results suggest that the average level of serum lipids in the same apoE phenotype patients with gallstones is higher than that in controls, and the different apoE phenotypes patients with gallstones have different characteristics of dyslipidemia. ε2 allele is probably one of the dangerous factor in the lithogenesis of cholecystolithiasis.
Atherosclerotic cardiovascular disease (ASCVD) is a disease caused by the accumulation of atherosclerotic plaques that leads to arterial hardening and impairment of contractility. Proprotein convertase subtilisin/kexin type 9 (PCSK9) can increase low-density lipoprotein cholesterol levels in plasma, which accelerates the development and progression of ASCVD. This article intends to review the biological characteristics and functional mechanisms of PCSK9, elucidate its impact on the development and progression of ASCVD, provide research literature support for the diagnosis and treatment of such diseases and improving the prognosis of patients.
ObjectiveTo observe the lipid metabolism characteristics of type 2 diabetes mellitus (T2DM) patients with different levels of blood glucose control and preliminarily analyze their relationship with diabetic retinopathy (DR). MethodsA retrospective clinical study. From January 2019 to January 2024, 232 T2DM patients who underwent fundus examination in Department of Ophthalmology of Yichang Central People’s Hospital were included in the study. Based on the glycated hemoglobin A1c (HbA1c) test results, patients were divided into blood glucose standard group and blood glucose non standard group, with 100 and 132 cases respectively. Based on the results of fundus fluorescein angiography, patients were divided into non DR (NDR) group and DR group, with 89 and 143 cases, respectively. 100 healthy individuals who underwent physical examinations during the same period were selected as the control group. The thickness of peripapillary retinal nerve fiber layer (pRNFL) around the optic disc, the blood flow density of radial peripapillary capillaries (RPC) around the optic disc, and the thickness of ganglion cell complex (GCC) in the upper and lower parts of the optic disc and macular area were measured by optical coherence tomography angiography instrument. Fully automated biochemical analyzer was used to detect serum levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and HbA1c. After adjusting for confounding factors, multiple linear regression model was used to analyze the correlation between HbA1c and blood lipids. Multiple logistic regression analysis was conducted to investigate the correlation between TG, HDL-C, and the occurrence of DR. ResultsCompared with the control group, both the blood glucose standard group and the blood glucose non standard group had higher levels of HbA1c (F=8.115), TC (F=4.373), TG (F=20.220), and LDL-C (F=12.271), and lower levels of HDL-C (F=6.349), with statistically significant differences (P＜0.05). Compared with the blood glucose standard group, patients in the blood glucose non standard group had higher levels of serum HbA1c (t=3.531), TC (t=2.561), TG (t=6.418), LDL-C (t=7.880), and lower levels of HDL-C (t=5.152), with statistically significant differences (P＜0.05). Correlation analysis showed that HbA1c was positively correlated with TC, TG, and LDL-C (P＜0.05), and negatively correlated with HDL-C (P＜0.05). Multiple logistic regression analysis showed that TG, LDL-C, and HDL-C were independent risk factors for the occurrence of DR (Ptrend＜0.05). Compared with the NDR group, the DR group had thinner GCC and pRNFL thickness in the upper part of the optic disc, and lower overall and RPC blood flow density in the upper part of the optic disc, with statistically significant differences (t=4.964, 2.406, 2.685, 2.404; P＜0.05). Correlation analysis results showed that TG, LDL-C, HDL-C, HbA1c were correlated with GCC thickness, pRNFL thickness, and RPC blood flow density (P＜0.05). ConclusionsThe higher the blood glucose level in T2DM patients, the more likely they are to experience dyslipidemia. TG, LDL-C, and HDL-C are independent risk factors for the occurrence of DR. Abnormal blood lipids and blood glucose levels in T2DM patients can affect retinal nerves, blood vessels, and function.
To study the lipid peroxidation injury and the protecting effect of vitamin E emulsion on liver function following acute cholangitis. During the operation and 24 hours after operation, vitamin E emulsion or placebo emulsion was infused via mesenteric vein in rats suffering acute cholangitis. The contents of malondialdehyde (MDA), superoxide dismutase (SOD) and adenosine triphosphate (ATP) in the liver tissue and serum were measured at 48hrs after operation. Results: As compared with the placebo emulsion group, MDA and mGOT contents in the liver tissue and serum decreased significantly, but SOD activity increased dramatically in the VE emulsion group. ATP content in the infected lobe was much higher than those in the placebo emulsion group. Conclusion: Intravenous infusion of large dose of vitamin E emulsion may reduce the lipid peroxidation reaction in acute cholangitis, and have protecting effect.
ObjectiveTo investigate the correlation between epileptic seizure and lipid metabolism and nutritional index in patients with glioma.Methods380 patients with glioma admitted to Linyi People's Hospital Affiliated to Shandong University from January 2017 to December 2019 were selected. According to whether the first symptom is epilepsy or not, patients with glioma were divided into epileptic group (n=72) and control group (n=308). Combined with the basic demographic information, lipid metabolism and nutrition indicators in the medical records, the two groups of patients were analyzed retrospectively.ResultsThe mean age of epileptic group was (39.38±13.40) years, and the sex ratio was 1.88∶1. The mean age of the control group was (46.25±15.97) years, and the sex ratio was 1.20∶1. Chi-square test results showed that there was a statistical correlation between gender, alcohol consumption, history of hypertension and seizures (χ2=0.813, P<0.05). The results of multiple logistic regression analysis showed that there were differences in age, weight, LDL-C and potassium between the epilepsy group and the control group (P<0.05).ConclusionMale, age, weight, LDL-C and abnormal potassium concentration are risk factors for epilepsy in patients with brain tumor, and effective prevention and treatment measures should be taken in time for patients with abnormal lipid metabolism and nutritional indicators.