Circulating circular RNA profiles associated with celiac disease seropositivity in children with type 1 diabetes.

Introduction: The frequency of celiac disease autoantibody (CDAb) positivity in type 1 diabetes (T1D) has increased due to unclear mechanisms, including autoimmune injury. Circular ribonucleic acids (circRNAs) participate in autoimmune diseases, but the roles of circRNAs in T1D with CDAbs are currently unknown. This study aimed to determine the frequency of CDAbs in Chinese children with T1D and describe the relationship between CDAbs and circRNAs.

Osteocalcin Levels in Male Idiopathic Hypogonadotropic Hypogonadism: Relationship With the Testosterone Secretion and Metabolic Profiles.

Idiopathic hypogonadotropic hypogonadism (IHH) patients are characterized by the absence of puberty and varying degrees of deteriorated metabolic conditions. Osteocalcin (OC) could regulate testosterone secretion and energy metabolism, but it remains unknown whether such an effect exists in IHH patients. Our study is aimed to examine the relationship between serum OC levels with testosterone and its responsiveness to gonadotropin stimulation and metabolic profiles in male IHH patients.

Hemo oxygenase-1 induction in vitro and in vivo can yield pancreas islet xenograft survival and improve islet function.

Background: The induced expression of heme oxygenase-1 (HO-1) in donor islets improves allograft survival. Cobalt protoporphyrin (CoPP) could significantly enhance the expression of HO-1 mRNA and protein in rat islet safely. Our work was to study how to protect pancreatic islet xenograft by CoPP-induction.

[Protective effect of heme oxygenase-1 induction in vivo to pancreas islet xenograft].

Objective: To study the protective effect of islet xenograft and its possible mechanism of high expression of heme oxygenase-1 (HO-1) in donor pancreas islet induced by cobalt protoporphyrin (CoPP).

Methods: Male SD rats and C57BL/6 mouse were used as donors and recipients respectively. Donors were divided into 3 groups according to different pretreatment 24 hours before donation: control group (injected intraperitoneally with NaCl), induce group [injected intraperitoneally with cobalt-protoporphyrin (CoPP)], block group (injected intraperitoneally with CoPP and zinc protoporphyrin simultaneously).

Clinical and genetic analysis for four Chinese families with Prader-Willi syndrome.

Prader-Willi syndrome (PWS) is a complex, genetic, multisystem disorder. Its major clinical features include neonatal hypotonia and failure to thrive, mental retardation, hypogonadism, short hands and feet, hyperphagia-caused obesity, and characteristic appearance. The genetic basis of PWS is also complex.

Insulin sensitivity and first-phase insulin secretion in obese Chinese with hyperglycemia in 30 and/or 60 min during glucose tolerance tests.

The purpose of this study was to investigate insulin sensitivity and first-phase insulin secretion in obesity with hyperglycemia in 30 and/or 60 min during oral glucose tolerance (OGTT, glucose > or = 11.1 mmol/l, post-loading hyperglycemia, PLH) in Chinese population. A total of 196 nondiabetic subjects were included in the present study, among them 99 had normal glucose tolerance (NGT, subdivided into 32 lean NGT and 67 obese NGT), 74 had obesity with impaired glucose tolerance (IGT) and 23 had obesity with PLH.

Interleukin-18 enhances glucose uptake in 3T3-L1 adipocytes.

In order to characterize the potential causative effects of interleukin-18 (IL-18) on insulin resistance, we measured glucose uptake in 3T3-L1 adipocytes treated with mouse recombinant IL-18. IL-18 surprisingly enhanced, rather than reduced insulin-mediated glucose uptake in adipocytes. Moreover IL-18 could counteract the glucose uptake suppression caused by tumor necrosis factor alpha in 3T3-L1 adipocytes.

Clinical and genetic analysis for a Chinese family with hereditary fructose intolerance.

Hereditary fructose intolerance (HFI) is an inheritable disorder of fructose metabolism, inherited as an autosomal recessive disorder and caused by catalytic deficiency of aldolase B, which is critical for gluconeogenesis and fructose metabolism. The affected individuals develop severe hypoglycemia after taking foods containing fructose and cognate sugars. The exons 2-9 of the aldolase B (gene symbol ALDOB) gene from one Chinese HFI patient were amplified by the polymerase chain reaction (PCR), and direct sequence determination was applied to the amplified fragments.

The interplay of insulin resistance and beta-cell dysfunction involves the development of type 2 diabetes in Chinese obeses.

Type 2 diabetes mellitus (T2DM) is a heterogeneous disorder characterized by defects in insulin secretion and action and obesity plays an important role in the deterioration of glucose metabolism. In the present study we evaluated the degree of insulin resistance and first-phase insulin secretion of beta-cell in obese subjects with normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and T2DM in Chinese. A total of 220 subjects underwent standard 75 g oral glucose tolerance test (OGTT) and insulin-modified frequently sampled intravenous glucose tolerance test (FSIGT).

[Characteristics of the populations defined by different criteria of the metabolism syndrome].

Objective: To compare the characteristics of over weight and obesity subjects defined by three criteria: World Health Organization (WHO) in 1999, the National Cholesterol Education Program Adult Treatment Panel Nll (NCEP-ATP II ) in 2001, and the International Diabetes Federation (IDF) in 2005.

Methods: Medical history collection, physical examination, oral glucose tolerance test ( OGTT) , and frequently sampled intravenous glucose tolerance test (FSIGTT) were performed in 371 subjects with body mass index (BMI)> or =23 kg/m(2). Fasting blood samples were taken to test lipid profiles, urea acid level and so on.

Elevated serum levels of interleukin-18 are associated with insulin resistance in women with polycystic ovary syndrome.

Overproduction of proinflammatory factors is associated with obesity and diabetes. Interleukin (IL)-18 as a member of IL-1 cytokine family is increased in obese, in diabetic, and even in polycystic ovary syndrome (PCOS) patients. In the present study we evaluated the association of serum IL-18 levels with insulin resistance in PCOS women.

Hyperglycaemia after glucose loading is a major predictor of preclinical atherosclerosis in nondiabetic subjects.

Objective: Carotid intima-media thickness (IMT) has proved to be an independent marker of preclinical atherosclerosis. The aim of this study was to determine whether carotid IMT is associated with the plasma glucose concentration in the fasting state, after loading with oral glucose, or with the insulin sensitivity index (ISI) in nondiabetic subjects with different levels of glucose intolerance and insulin resistance.

Design: Cross-sectional study.

[A study of the degrees of insulin resistance and first-phase insulin secretion of beta-cells in metabolic syndrome patients with different glucose tolerance].

Objective: To explore the insulin resistance and first-phase insulin secretion of beta-cells in normal persons, obese persons with normal glucose tolerance, obese persons with impaired glucose tolerance (IGT) and obese persons with type 2 diabetes (T2DM).

Methods: 75 g oral glucose tolerance test (OGTT) and Bergman's minimal model method of frequently sampled intravenous glucose tolerance test (FSIGTT) with reduced sample number (n = 12) were performed on a total of 151 subjects, 29 normal controls (control group), 44 obese persons with normal glucose tolerance (obesity group), 36 obese persons with IGT (IGT group), and 42 T2DMT patients (T2DM group) to determine the acute insulin response to glucose (AIRg), insulin sensitivity index (S(I)), and glucose effectiveness (S(G)). The disposition index (DI, AIRg X S(I)) was calculated to determine whether AIRg was adequate to compensate for insulin resistance.

[Fasting serum free fatty acid, insulin sensitivity index and serum lipid levels in individuals with different body mass index and glucose tolerance].

Objective: To investigate the relationship among fasting serum free fatty acid (FFA), insulin sensitivity index (ISI), serum triglyceride (TG) and total cholesterol (TC) levels in subjects with different body mass index (BMI) and glucose tolerance by using Bergman's minimodel method.

Methods: 26 normal control subjects, 39 obese subjects, 25 impaired glucose tolerance (IGT) subjects and 21 patients with newly diagnosed type 2 diabetes mellitus (DM) were recruited into this study. Serum FFA level was measured with radioimmunoassay and ISI was obtained by using Bergman's minimal model method.