ObjectiveTo explore the application of enhanced funnel plots (EFP) and trial sequential analysis (TSA) in robustness assessment of meta-analysis results.MethodsData were extracted from published meta-analysis. The EFP was used to evaluate the robustness of the significance and heterogeneity of the current meta-analysis. The TSA was used to judge the sufficiency of the cumulative sample size of the current meta-analysis and to assess the robustness of conclusions based on current evidence.ResultsThe EFP showed that the meta-analysis results of low-density lipoprotein (LDL) was robust, and the meta-analysis results of triglyceride (TG), total cholesterol (TC) and high-density lipoprotein (HDL) were not stable. The TSA showed that the cumulative sample size of LDL had reached the required information size (RIS), and the current conclusion was stable. The cumulative Z value of TG, TC and HDL neither reached the RIS nor passed through the TSA monitoring boundary or futility boundary, indicating that current conclusions were not robust.ConclusionsThe combination of EFP and TSA can make a comprehensive judgment on the robustness of current meta-analysis results, and provide methodological support in the robustness assessment of results for future systematic reviews and meta-analyses.
Objective To discuss the correlation between the letpin level and the pathogenesis of avascular necrosis of the femoral head (ANFH) by measuring the leptin expression of the femoral head in patients with ANFH. Methods Between July 2009 and February 2011, 16 patients with ANFH (including 10 cases of steroid-induced ANFH and 6 cases of alcohol-induced ANFH, ANFH group) and 11 patients with proximal femur fracture (control group) were included in the experiment. There was no significant difference in age, weight, and body mass index between 2 groups (P gt; 0.05). The peripheral blood and bone marrow were extracted to measure the blood lipid level and the free fat (FF) content, respectively. ELISA was used to detect the levels of the leptin, soluble leptin receptor (sLR), osteoprotegerin (OPG), and soluble receptor activator of nuclear factor κB (sRANKL); the leptin biological activity and the activity of osteoclasts were calculated. The femoral head specimens were harvested to count leptin-positive cells by immunohistochemical staining. Results No significant difference in the blood lipid level was found between 2 groups (P gt; 0.05), but the FF content in ANFH group was significantly lower than that in control group (t= — 14.230, P=0.000). The intramedullary leptin expression was found in both groups; however, the intramedullary leptin level in ANFH group decreased significantly when compared with the level in control group (t=4.425, P=0.002). There were significant differences in the levels of leptin, OPG, and sRANKL between 2 groups (P lt; 0.05). The leptin biological activity of ANFH group was significantly lower than that of control group (P lt; 0.05), but the activity of osteoclasts of ANFH group was significantly higher than that of control group (P lt; 0.05). There was a positive correlation between the leptin level and leptin biological activity (r=0.922 7, P=0.000 0), and a negative correlation between the leptin level and OPG content (r= — 0.396 2, P=0.040 8), FF content (r= — 0.806 1, P=0.000 0), while it had no correlation between the leptin level and sLR and sRANKL content (P gt; 0.05). Conclusion Intramedullary expression and bioactivity of the leptin decrease significantly in ANFH patients, which may play an important role in the pathogenesis of ANFH.
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.
Objective To explore the relationship between the structure and function of galectin-3， lipid metabolism disorders， and investigate the expression of galectin-3 in the occurrence and progress of lower limb arteriosclerosis block disease. Methods Related articles were reviewed. Results Galectin-3 participates in inflammatory reaction and lipid metabolism disorders， regulates the cell growth， differentiation， adhesion， apoptosis， and angiogenesis， and palys a role in the occurrence and progress of arteriosclerosis obliterans. Conclusion Galectin-3 is correlation with the occurrence， progress， and the prognosis of arteriosclerosis obliterans.
Atrial fibrillation (AF) is the most common type of cardiac arrhythmia. The metabolic changes of atrial myocytes, especially lipid metabolism, have a significant impact on the electrical signals and structural remodeling of atrial tissue, and play an important role in the occurrence and development of AF. The reduction of fatty acid oxidation ratio and increased aerobic glycolysis ratio are characteristic changes of tissue metabolic remodeling in AF. In this review, we will introduce the latest research status of lipid metabolism in AF from aspects of AF metabolism, clinical treatment and diagnosis and prognosis.
Amine oxidase copper-containing 1 (AOC1) is a key member of copper amine oxidase family, which is responsible for deamination oxidation of histamine and putrescine. In recent years, AOC1 has been reported to be associated with various cancers, with its expression levels significantly elevated in certain cancer cells, suggesting its potential role in cancer progression. However, its function in lipid metabolism still remains unclear. Through genetic analysis, we have discovered a potential relationship between AOC1 and lipid metabolism. To further investigate, we generated Aoc1−/− mice and characterized their metabolic phenotypes on both chow diet and high-fat diet (HFD) feeding conditions. On HFD feeding conditions, Aoc1−/− mice exhibited significantly higher fat mass and impaired glucose sensitivity, and lipid accumulation in white adipose tissue and liver was also increased. This study uncovers the potential role of AOC1 in lipid metabolism and its implications in metabolic disorders such as obesity and type 2 diabetes, providing new targets and research directions for treating metabolic diseases.
ObjectiveTo investigate the prevalence of chronic obstructive pulmonary disease (COPD) with lipid metabolism disorders patients in Chengdu. MethodsWe randomly selected four communities from urban and rural areas in Chengdu between February and December, 2010, with multistage cluster random sampling method; 1 931 residents aged from 40 to 70 received special questionnaire from the BOLD Study, lung examination, blood biochemical examination, and physical examination. ResultsThe prevalence of COPD was 60.26% (91/151) with dyslipidemia; while non-COPD was 68.17% (972/1 428), and the difference was significant (P<0.05), in which the most obvious difference is triglycerides (TG). The prevalence of COPD was 6.62% (10/151) with underweight; while non-COPD was 4.97% (71/1 428), and the difference was significant (P<0.001). The prevalence of COPD was 21.19% (32/151) with abdominal obesity; while non-COPD was 30.81% (440/1 428), and the difference was significant (P<0.05). ConclusionThe prevalence of COPD with lipid metabolism disorders is lower than which with non-COPD in Chengdu. It provides an evidence for the nutrition support therapy in the treatment of COPD.
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.
Objective To study the latest research progress of the formation mechanism of cholesterol stone disease and forming factors of cholesterol stone disease and to provide new theoretical level and develop a new development direction for guiding clinical application. Methods The related literatures at home and abroad were analyzed, compared and summarized, and the current relevant research dynamic of cholesterol stone disease was sketched. Results The formation of cholesterol gallstone is closely related to the abnormal levels of serum lipids metabolism, bacterial and viral infection, and the expression of genes related to cholesterol gallstone. Conclusions The formation of cholesterol calculus disease is a kind of interaction and intricate disease process involving of environmental factors, genetic factors, and biological factors. Although there has been a lot of blood lipid, protein correlation research with cholesterol stone, there are also many studies such as using gene transplantation and gene knockout, but gene technology of cholesterol stone disease diagnosis and treatment is expected to become the new hot research topic.