Idiopathic hypogonadotropic hypogonadism caused by compound heterozygosity for two novel mutations in the GNRH1 gene: a case report.

BACKGROUND: Idiopathic hypogonadotropic hypogonadism (IHH) is a rare congenital or acquired genetic disorder caused by gonadotropin-releasing hormone (GnRH) deficiency. IHH patients are divided into two major groups, hyposmic or anosmic IHH (Kallmann syndrome) and normosmic IHH (nIHH), according to whether their sense of smell is intact. Here we report a case of novel compound heterozygous mutations in the GNRH1 gene in a 15-year-old male with nIHH. CASE PRESENTATION: The patient presented typical clinical symptoms of delayed testicular development, with testosterone < 3.5 mmol/L and reduced gonadotropin (follicle-stimulating hormone, luteinizing hormone) levels. Two heterozygous variants of the GNRH1 gene were detected, nonsense variant 1: c.85G > T:p.G29* and variant 2: c.1A > G:p.M1V, which disrupted the start codon. CONCLUSIONS: Two GNRH1 mutations responsible for nIHH are identified in this study. Our findings extend the mutational spectrum of GNRH1 by revealing novel causative mutations of nIHH.

Liraglutide therapy in an adolescent with Prader­Willi syndrome and concomitant diabetes mellitus.

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Knockdown of IL4I1 Improved High Glucose-evoked Insulin Resistance in HepG2 Cells by Alleviating Inflammation and Lipotoxicity Through AHR Activation.

Insulin resistance (IR) is one of the leading causes of Type 2 diabetes mellitus (T2DM). Inflammation, as a result of the disordered immune response, plays important roles in IR and T2DM. Interleukin-4-induced gene 1 (IL4I1) has been shown to regulate immune response and be involved in inflammation progress. However, there was little known about its roles in T2DM. Here, high glucose (HG)-treated HepG2 cells were used for T2DM investigation in vitro. Our results indicated that the expression of IL4I1 was up-regulated in peripheral blood samples of T2DM-patients and HG-induced HepG2 cells. The silencing of IL4I1 alleviated the HG-evoked IR through elevating the expressions of p-IRS1, p-AKT and GLUT4, and enhancing glucose consumption. Furthermore, IL4I1 knockdown inhibited inflammatory response by reducing the levels of inflammatory mediators, and suppressed the accumulation of lipid metabolites triglyceride (TG) and palmitate (PA) in HG-induced cells. Notably, IL4I1 expression was positively correlated with aryl hydrocarbon receptor (AHR) in peripheral blood samples of T2DM-patients. The silencing of IL4I1 inhibited the AHR signaling by reducing the HG-induced expressions of AHR and CYP1A1. Subsequent experiments confirmed that 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), an agonist of AHR, reversed the suppressive effects of IL4I1 knockdown on HG-caused inflammation, lipid metabolism and IR in cells. In conclusion, we found that the silencing of IL4I1 attenuated inflammation, lipid metabolism and IR in HG-induced cells via inhibiting AHR signaling, suggesting that IL4I1 might be a potential therapy target for T2DM.

Mechanistic and therapeutic links between rheumatoid arthritis and diabetes mellitus.

Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by persistent synovial inflammation and irreversible cartilage and bone damage. Despite its predominant osteoarticular and periarticular manifestations, RA is also a systematic disease associated with organ-specific extra-articular manifestation. Increasing evidence indicates that RA patients are susceptible to diabetes mellitus (DM), and RA aggravates metabolic disordered in DM, indicating the close association between RA and DM. Many factors involved in RA stimulate insulin resistance and DM development. These factors include proinflammatory cytokines (such as TNF-α, IL-6, IL-1ß), RA autoantibodies (such as rheumatoid factor, cyclic citrullinated peptide antibodies), excess RA related adipokines (such as leptin, resistin, ANGPTL4), C-creative protein, and other protein (such as TXNDC5, NLRP3, RBP4). Furthermore, commonly used RA drugs, such as conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), biological disease-modifying antirheumatic drugs (bDMARDs), and glucocorticoids, provide potential benefits in improving insulin resistance and inhibiting DM development. This review discusses the mechanistic and therapeutic links between RA and DM, aiming to provide valuable information for the prevention and treatment of DM in RA patients.

Non-diabetic ketoacidosis: A case of alcoholic ketoacidosis accompanied by hyperglycemia.

Alcoholic ketoacidosis (AKA) lacks specific clinical presentation. The results of blood testing commonly show hemoconcentration, elevated ß-hydroxybutyrate levels, and acidosis in patients with AKA. Herein, we report a case of AKA accompanied by hyperglycemia and review the related literature. Case report: AKA associated with hyperglycemia is rare, and its pathogenesis is similar to that of diabetic ketoacidosis, thereby making differentiation challenging. Accordingly, AKA is easily misdiagnosed by endocrinologists. The main symptoms of a 37-year-old female included hyperglycemia, elevated ß-hydroxybutyrate levels, and metabolic acidosis. Primary clinical presentations were severe nausea and vomiting. The patient initially diagnosed with DKA were eventually confirmed as AKA, who recovered after active therapy with rehydration and correction of hyperglycemia, electrolyte imbalance, and ketosis. This study provides a reference for clinicians to reduce missed diagnosis and the misdiagnosis rates of AKA.

Effectiveness and safety of Bifidobacterium and berberine in human hyperglycemia and their regulatory effect on the gut microbiota: a multi-center, double-blind, randomized, parallel-controlled study.

BACKGROUND: Berberine and Bifidobacterium have been reported to improve glucose tolerance in people with hyperglycemia or other metabolic disorders. This study aimed to assess the hypoglycemic effect and the regulation of the gut microbiota caused by berberine and Bifidobacterium and the possible additive benefits of their combination. METHODS: This was an 18-week, multi-center, randomized, double-blind, parallel-controlled study of patients newly diagnosed with hyperglycemia. After a 2-week run-in period, 300 participants were randomly assigned to the following four groups for 16 weeks of treatment: berberine (Be), Bifidobacterium (Bi), berberine and Bifidobacterium (BB), and placebo group. The primary efficacy endpoint was the absolute value of fasting plasma glucose (FPG) compared with baseline after 16 weeks of treatment. RESULTS: Between October 2015 and April 2018, a total of 297 participants were included in the primary analysis. Significant reductions of FPG were observed in the Be and BB groups compared with the placebo group, with a least square (LS) mean difference of - 0.50, 95% CI [- 0.85, - 0.15] mmol/L, and - 0.55, 95% CI [- 0.91, - 0.20] mmol/L, respectively. The Be and BB groups also showed significant reductions in 2-h postprandial plasma glucose. A pronounced decrease in HbA1c occurred in the BB group compared to the placebo group. Moreover, compared with the Bi and placebo groups, the Be and BB groups had more changes in the gut microbiota from the baseline. CONCLUSIONS: Berberine could regulate the structure and function of the human gut microbiota, and Bifidobacterium has the potential to enhance the hypoglycemic effect of berberine. These findings provide new insights into the hypoglycemic potential of berberine and Bifidobacterium. TRIAL REGISTRATION: ClinicalTrials.gov , NCT03330184. Retrospectively registered on 18 October 2017.

Comparison of Blood Glucose Variability Between Exenatide and Biphasic Insulin Aspart 30 in Chinese Participants with Type 2 Diabetes Inadequately Controlled with Metformin Monotherapy: A Multicenter, Open-Label, Randomized Trial.

INTRODUCTION: To compare blood glucose variability (GV) in Chinese participants with type 2 diabetes mellitus (T2DM) whose blood glucose levels are inadequately controlled with metformin monotherapy after twice-daily exenatide or biphasic insulin aspart 30 (BIAsp30). METHODS: In this 16-week multicenter, randomized clinical trial, 104 participants were randomized 1:1 to receive exenatide (exenatide group) or BIAsp30 (BIAsp30 group) twice daily. All participants continued metformin treatment. The primary outcome was the change in GV as measured by a continuous glucose monitoring system (CGMS) from baseline to 16 weeks. RESULTS: At 16 weeks, both the Exenatide and BIAsp30 groups effectively decreased mean glucose (MG), but neither group changed the mean amplitude of glycemic excursion (MAGE), largest amplitude of glycemic excursion (LAGE), mean of daily difference (MODD), or standard deviation of blood glucose (SDBG). The decrease in 2-h post-breakfast glucose excursions was greater in the Exenatide group compared to the BIAsp30 group, with a least square (LS) mean difference [95% CI] of (1.58 [0.53, 2.63]). Exenatide also significantly reduced 2-h post-lunch glucose excursion compared to BIAsp30 (LS mean difference [95% CI], 1.19 [0.18, 2.20]). The Exenatide group had significantly reduced body weight and body mass index (BMI), while the BIAsp30 group had increased weight and had no change in BMI. Both treatments were well tolerated with no serious hypoglycemic events and with fewer identified hypoglycemic events in the Exenatide group than in the BIAsp30 group (5.77% vs. 17.31%, P < 0.01). CONCLUSION: Although there was no difference in change of GV between Exenatide and BIAsp30, exenatide provided more improvement in postprandial glucose excursion and weight control, without increasing the risk of hypoglycemia in Chinese patients with T2DM whose blood glucose was inadequately controlled with metformin. These findings may provide new options for patients who choose further hypoglycemic treatment, especially in patients with obesity who have large postprandial plasma glucose excursions. TRIAL REGISTRATION: ClinicalTrials.gov indentifier: NCT02449603.

SIRT7 promotes thyroid tumorigenesis through phosphorylation and activation of Akt and p70S6K1 via DBC1/SIRT1 axis.

SIRT7 is an NAD+-dependent histone/non-histone deacetylase, which is highly expressed in different types of cancer including thyroid cancer; however, its biological function in thyroid cancer is still undiscovered. In this study, we found that SIRT7 expression was elevated in papillary thyroid cancers (PTCs), and demonstrated that SIRT7 knockdown dramatically inhibited the proliferation, colony formation, migration and invasion of thyroid cancer cells, and induced thyroid cancer cell cycle arrest and apoptosis. Conversely, SIRT7 re-expression markedly enhanced thyroid cancer cell growth, invasiveness and tumorigenic potential in nude mice. Further studies revealed that SIRT7 exerted an oncogenic function in thyroid tumorigenesis by phosphorylation of Akt and p70S6K1. Mechanistically, SIRT7 binds to the promoter of deleted in breast cancer-1 (DBC1), an endogenous inhibitor of SIRT1, and represses its transcription via deacetylation of H3K18Ac. This results in enhanced interactions between SIRT1 and Akt or p70S6K1, thereby promoting deacetylation and subsequent phosphorylation of Akt and p70S6K1 through a SIRT1-dependent manner. Altogether, our results show that DBC1 is a downstream target of SIRT7, and first uncover that SIRT7 promotes thyroid tumorigenesis through phosphorylation and activation of Akt and p70S6K1 via the modulation of DBC1/SIRT1 axis.

Increased copy number of mitochondrial DNA predicts poor prognosis of esophageal squamous cell carcinoma.

Change in mitochondrial DNA (mtDNA) copy number has been reported in esophageal squamous cell carcinoma (ESCC). However, its prognostic implication in ESCC remains largely unknown. Using reverse transcription-quantitative PCR assay, the mtDNA copy number was assessed in a cohort of patients with ESCC (n=141) and normal esophageal tissues (n=45), and the association between variable mtDNA levels and clinical outcomes of patients with ESCC were studied. Data revealed that ESCC patients exhibited an increased mtDNA content compared to control subjects. Furthermore, increased mtDNA content was associated with a significantly increased risk of cancer-associated mortality. This molecular event was associated with poorer survival in patients with ESCC, and was an independent predictor of patient survival. Data demonstrated that increased mtDNA content is a common genetic event in ESCC and may be a predictive factor of poor prognosis for ESCC patients.

Studies of genetic variability of the hepatocyte nuclear factor-1α gene in an Indian maturity-onset diabetes of the young family.

Maturity-onset diabetes of the young (MODY), one of the specific types of diabetes mellitus, is a monogenetic disorder characterized by an autosomal dominant (AD) inheritance and ß-cell dysfunction. To study an Indian family with clinical diagnosis of MODY and detect the genetic mutations in the aspect of molecular mechanism, seven blood samples were obtained from the diabetic patients of this pedigree and genomic DNA was extracted from peripheral leukocytes. The exon1, exon2 and exon4 of hepatocyte nuclear factor-1α (HNF-1α) gene were amplified by polymerase chain reaction. Then the products were sequenced and compared with standard sequences on gene bank. As a result, two mutations were detected in exon1. That was CTC â†’ CTG (Leu â†’ Leu) in codon17 and ATC â†’ CTC (Ile â†’ Leu) in codon27. I27L was speculated to have a close relationship with the glycometabolism and the pathogenesis of diabetes mellitus together with the putative novel mutation existed in this Indian pedigree. Meanwhile, one mutation of GGG â†’ GGC (Gly â†’ Gly) in codon288 of exon4 was detected in the proband. No mutations were found in exon2 but a G â†’ T base substitution in the intron4 region among all seven samples was detected. It may have some potential effects on the onset of diabetes in this family, but we do not have any evidence right now. Although it requires further investigation on the function of mutations found in the intron region, our research may provide some clue for this issue and it deserves more attention.

Sulforaphane inhibits thyroid cancer cell growth and invasiveness through the reactive oxygen species-dependent pathway.

Sulforaphane (SFN), a natural compound derived from broccoli/broccoli sprouts, has been demonstrated to be used as an antitumor agent in different types of cancers. However, its antitumor effect in thyroid cancer remains largely unknown. The aim of the study was to investigate the therapeutic potential of SFN for thyroid cancer and explore the mechanisms underlying antitumor effects of SFN by in vitro and in vivo studies. Our data demonstrated that SFN significantly inhibited thyroid cancer cell proliferation in a dose- and time-dependent manner, induced G2/M phase cell cycle arrest and apoptosis, and inhibited thyroid cancer cell migration and invasion by suppressing epithelial-mesenchymal transition (EMT) process and expression of Slug, Twist, MMP-2 and -9. Mechanically, SFN inhibited thyroid cancer cell growth and invasiveness through repressing phosphorylation of Akt, enhancing p21 expression by the activation of Erk and p38 signaling cascades, and promoting mitochondrial-mediated apoptosis via reactive oxygen species (ROS)-dependent pathway. Growth of xenograft tumors derived from thyroid cancer cell line FTC133 in nude mice was also significantly inhibited by SFN. Importantly, we did not find significant effect of SFN on body weight and liver function of mice. Collectively, we for the first time demonstrate that SFN is a potentially effective antitumor agent for thyroid cancer.

Induction of murine neonatal tolerance against Graves' disease using recombinant adenovirus expressing the TSH receptor A-subunit.

Graves' disease is a common organ-specific autoimmune disease. The identity of its autoantigen, the TSH receptor (TSHR), was established and used to induce a typical animal model. A-subunit, the shed portion of TSHR, either initiates or amplifies the autoimmune response of the thyroid gland, thereby causing Graves' disease in humans. In the present study, we investigate the effect of the TSHR A-subunit on the induction of murine neonatal tolerance for the development of Graves' disease. Female BALB/c mice were pretreated with different doses of adenovirus expressing the A-subunit of TSHR (Ad-TSHR289) by either ip or im injection within the first 24 h after their birth. Graves' disease was induced after the animals reached adulthood. Nearly all mice pretreated with the high dose of Ad-TSHR289 failed to develop TSHR antibodies, detected by the TSH-binding inhibition assay, hyperthyroidism, and thyroid follicular hyperplasia. The mice preimmunized im with the lower doses of Ad-TSHR289 developed a relatively low level of TSH-binding inhibition and the low incidence of hyperthyroidism. Accordingly, the percentages of splenic CD4+CD25+/CD4+ and CD25+Foxp3+/CD4+ Treg cells were increased in mice pretreated with the high dose of Ad-TSHR289. Taken together, our data strongly indicate that the immunotolerance against Graves' disease could be induced in neonatal mice using a specific TSHR antigen in a high dose either by ip or im injection, preventing the development of Graves' disease.