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Wang-shu Liu Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Ling-yan Hua Department of Ophthalmology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Su-xiang Zhu Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Feng Xu Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Xue-qin Wang Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Chun-feng Lu Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Jian-bin Su Department of Endocrinology, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Feng Qi Emergency Intensive Care Unit, Affiliated Hospital 2 of Nantong University and First People’s Hospital of Nantong City, Nantong, China

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Background

The aim of the study was to explore whether plasma stromal cell-derived factor 1 (SDF-1) levels are associated with the EZSCAN score and its derived indicators in patients with type 2 diabetes (T2D).

Methods

From July 2020 to December 2020, a total of 253 patients with T2D were consecutively recruited. Serum SDF-1 levels were measured by sandwich ELISA. EZSCAN test was applied to evaluate the sudomotor function of each patient, and based on the results, EZSCAN score, cardiac autonomic neuropathy risk score (CANRS) and cardiovascular risk score (CVDRS) were calculated by particular algorithms. In addition, other relevant clinical data were also collected.

Results

With increasing tertiles of serum SDF-1 levels, the CANRS and CVDRS significantly increased (both Pfor trend <0.001), while the EZSCAN score significantly decreased (Pfor trend <0.001). Moreover, serum SDF-1 levels were significantly and positively correlated with the CANRS and CVDRS (r = 0.496 and 0.510, respectively, both P  < 0.001), and negatively correlated with the EZSCAN score (r = −0.391, P  < 0.001). Furthermore, multivariate linear regression analyses were constructed, and after adjusting for other clinical covariates, serum SDF-1 levels were independently responsible for EZSCAN score (β = −0.273, t = −3.679, P  < 0.001), CANRS (β = 0.334, t = 5.110, P  < 0.001) and CVDRS (β = 0.191, t = 4.983, P  = 0.003).

Conclusions

SDF-1 levels in serum were independently associated with the EZSCAN score and its derived indicators, such as CANRS and CVDRS in patients with T2D.

Open access
Alexandra Kiess Department of Pediatric Cardiology, Faculty of Medicine, Heart Center Leipzig, University of Leipzig, Strümpellstraße, Leipzig, Germany
Department of Child and Adolescent Medicine, Section of Pediatric Cardiology, University Hospital Jena, Am Klinikum, Jena, Germany

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Jessica Green Alder Hey Children's NHS Foundation Trust, Pediatric Intensive Care Unit, Eaton Road Liverpool, Great Britain

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Anja Willenberg Institute of Laboratory Medicine, Clinical Chemistry, and Molecular Diagnostics (ILM), University of Leipzig, Liebigstrasse, Leipzig, Germany

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Uta Ceglarek Institute of Laboratory Medicine, Clinical Chemistry, and Molecular Diagnostics (ILM), University of Leipzig, Liebigstrasse, Leipzig, Germany

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Ingo Dähnert Department of Pediatric Cardiology, Faculty of Medicine, Heart Center Leipzig, University of Leipzig, Strümpellstraße, Leipzig, Germany

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Wieland Kiess LIFE Leipzig Research Center for Civilization Diseases, University of Leipzig, Philipp-Rosenthal-Strasse, Leipzig, Germany
Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), University of Leipzig, Liebigstrasse, Leipzig, Germany

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Mandy Vogel LIFE Leipzig Research Center for Civilization Diseases, University of Leipzig, Philipp-Rosenthal-Strasse, Leipzig, Germany
Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), University of Leipzig, Liebigstrasse, Leipzig, Germany

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Background and objectives

As part of the LIFE Child study, we previously described the associations between N-terminal-pro-hormone brain natriuretic peptide (NT-proBNP) and hs-troponin T (hs-TnT) levels and an individual’s sex, age and pubertal status, as well as with body mass index (BMI) and serum lipid levels. For NT-proBNP, we found inverse associations with advancing puberty, increasing BMI and serum lipid levels. These findings led us to further question the putative influences of the developing individual’s metabolic and growth status as represented by levels of insulin-like growth factor-1 (IGF-1) and IGF-1-binding protein-3 (IGF-BP3) as well as hemoglobin A1c (HbA1c) and Cystatin C (CysC).

Material and methods

Serum values, medical history and anthropometric data provided by 2522 children aged 0.25–18 years were collected and analyzed as per study protocol.

Results

A strong negative association between NT-proBNP values and IGF-1, IGF-BP3 and HbA1c levels was identified. For IGF-BP3, this interaction was modulated by sex and age, for HbA1c only by age. For hs-TnT, a positive association was found with IGF-BP3, IGF-1 and CysC. The association between hs-TnT and IGF-1 was sex dependent. The association between CysC and hs-TnT was stronger in girls, but the interaction with age was only seen in boys. Between hs-TnT and HbA1c, the association was significantly negative and modulated by age.

Conclusion

Based on our large pediatric cohort, we could identify age- and sex-dependent interactions between the metabolic status represented by IGF-1, IGF-BP3, CysC and HbA1c levels and the cardiac markers NT-proBNP and hs-TnT.

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Veronica Astro Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

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Elisabetta Fiacco Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

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Kelly Johanna Cardona-Londoño Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

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Ilario De Toma Sequentia Biotech SL, Barcelona, Spain

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Hams Saeed Alzahrani Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

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Jumana Alama Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia

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Amal Kokandi Department of Dermatology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

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Taha Abo-Almagd Abdel-Meguid Hamoda Department of Urology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

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Majed Felemban Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
Center of Innovation in Personalized Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

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Antonio Adamo Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

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Objective

The transcriptional landscape of Klinefelter syndromeduring early embryogenesis remains elusive. This study aimed to evaluate the impact of X chromosome overdosage in 47,XXY males induced pluripotent stem cells (iPSCs) obtained from patients with different genomic backgrounds and ethnicities.

Design and method

We derived and characterized 15 iPSC lines from four Saudi 47,XXY KS patients and one Saudi 46,XY male. We performed a comparative transcriptional analysis using the Saudi KS-iPSCs and a cohort of European and North American KS-iPSCs.

Results

We identified a panel of X-linked and autosomal genes commonly dysregulated in Saudi and European/North American KS-iPSCs vs 46,XY controls. Our findings demonstrate that seven PAR1 and nine non-PAR escape genes are consistently dysregulated and mostly display comparable transcriptional levels in both groups. Finally, we focused on genes commonly dysregulated in both iPSC cohorts and identified several gene-ontology categories highly relevant to KS physiopathology, including aberrant cardiac muscle contractility, skeletal muscle defects, abnormal synaptic transmission, and behavioral alterations.

Conclusions

Our results indicate that a transcriptomic signature of X chromosome overdosage in KS is potentially attributable to a subset of X-linked genes sensitive to sex chromosome dosage and escaping X inactivation, regardless of the geographical area of origin, ethnicity, and genetic makeup.

Open access
Sharmin Jahan Department of Medicine, Monash University, Melbourne, Victoria, Australia
Centre for Endocrinology and Metabolism, Hudson Institute of Medical Research, Victoria, Australia
Department of Endocrinology and Metabolism, BSMMU, Dhaka, Bangladesh

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Jun Yang Department of Medicine, Monash University, Melbourne, Victoria, Australia
Centre for Endocrinology and Metabolism, Hudson Institute of Medical Research, Victoria, Australia

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Jinbo Hu Department of Endocrinology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Qifu Li Department of Endocrinology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Peter J Fuller Centre for Endocrinology and Metabolism, Hudson Institute of Medical Research, Victoria, Australia

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Primary aldosteronism (PA) is the most common cause of endocrine hypertension and is often underdiagnosed. This condition is associated with increased cardiovascular morbidity and mortality in comparison to age and blood pressure matched individuals with essential hypertension (EH). The diagnostic pathway for PA consists of three phases: screening, confirmatory testing, and subtyping. The lack of specificity in the screening step, which relies on the aldosterone to renin ratio, necessitates confirmatory testing. The Endocrine Society’s clinical practice guideline suggests four confirmatory tests, including the fludrocortisone suppression test (FST), saline suppression test (SST), captopril challenge test (CCT), and oral sodium loading test (SLT). There is no universally accepted choice of confirmatory test, with practices varying among centers. The SST and FST are commonly used, but they can be resource-intensive, carry risks such as volume overload or hypokalemia, and are contraindicated in severe/uncontrolled HTN as well as in cardiac and renal impairment. In contrast, CCT is a safe and inexpensive alternative that can be performed in an outpatient setting and can be applied when other tests are contraindicated. Despite its simplicity and convenience, the variability in captopril dose, testing posture, and diagnostic threshold limit its widespread use. This narrative review evaluates the diagnostic accuracy of the CCT across different populations, addresses controversies in its usage, and proposes recommendations for its use in the diagnosis of PA. Furthermore, suggestions for future research aimed at promoting the wider utilization of the CCT as a simpler, safer, and more cost-effective diagnostic test are discussed.

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Arno Téblick Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Ilse Vanhorebeek Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Inge Derese Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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An Jacobs Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Renata Haghedooren Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Sofie Maebe Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Gerdien A Zeilmaker-Roest Department of Neonatal & Pediatric Intensive Care, Division of Pediatric Intensive Care, Erasmus MC – Sophia Children’s Hospital, Rotterdam, the Netherlands

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Enno D Wildschut Department of Neonatal & Pediatric Intensive Care, Division of Pediatric Intensive Care, Erasmus MC – Sophia Children’s Hospital, Rotterdam, the Netherlands

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Lies Langouche Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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Greet Van den Berghe Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium

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In critically ill adults, high plasma cortisol in the face of low ACTH coincides with high pro-opiomelanocortin (POMC) levels. Glucocorticoids further lower ACTH without affecting POMC. We hypothesized that in pediatric cardiac surgery-induced critical illness, plasma POMC is elevated, plasma ACTH transiently rises intraoperatively but becomes suppressed post-operatively, and glucocorticoid administration amplifies this phenotype. From 53 patients (0–36 months), plasma was obtained pre-operatively, intraoperatively, and on post-operative days 1 and 2. Plasma was also collected from 24 healthy children. In patients, POMC was supra-normal pre-operatively (P < 0.0001) but no longer thereafter (P > 0.05). ACTH was never high in patients. While in glucocorticoid-naive patients ACTH became suppressed by post-operative day 1 (P < 0.0001), glucocorticoid-treated patients had already suppressed ACTH intraoperatively (P ≤ 0.0001). Pre-operatively high POMC, not accompanied by increased plasma ACTH, suggests a centrally activated HPA axis with reduced pituitary processing of POMC into ACTH. Increasing systemic glucocorticoid availability with glucocorticoid treatment accelerated the suppression of plasma ACTH.

Significance statement

Glucocorticoids are often administered during pediatric cardiac surgery. In critically ill children, endogenous systemic glucocorticoid availability is elevated already upon ICU admission while ACTH levels are normal. This hormonal constellation suggests the presence of active feedback inhibition of ACTH. In this study, we have documented that intraoperative administration of glucocorticoids accelerates the suppression of ACTH, resulting in low plasma ACTH already upon ICU admission. Pre-operative plasma POMC, the ACTH precursor, but not ACTH, was increased. This is compatible with a centrally activated HPA axis prior to surgery in young children but reduced processing of POMC into ACTH within the pituitary. These findings suggest that glucocorticoid treatment in the context of pediatric cardiac surgery may amplify pre-existing impaired pituitary processing of the prohormone POMC.

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Aasem Saif Internal Medicine Department, Cairo University, Cairo, Egypt

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Shrook Mousa Internal Medicine Department, Cairo University, Cairo, Egypt

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Maha Assem Internal Medicine Department, Cairo University, Cairo, Egypt

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Nashwa Tharwat National Nutrition Institute, Cairo, Egypt

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Alaa Abdelhamid Internal Medicine Department, Cairo University, Cairo, Egypt
Vascular Laboratory, Cairo University, Cairo, Egypt

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Hypothyroidism is associated with increased risk of atherosclerosis. We assessed carotid intima-media thickness (CIMT), as a marker of atherosclerosis, and endothelial function in patients with hypothyroidism. We included 70 female patients with hypothyroidism in the study, 40 patients with overt and 30 patients with subclinical hypothyroidism. Forty, age- and sex-matched, subjects with normal thyroid functions were also included as a control group. CIMT was measured using high-resolution color-coded Doppler ultrasonography. Endothelial function was assessed by measuring the percent of change in blood flow following heat-mediated vasodilation using laser Doppler flowmetry. CIMT was significantly higher in patients with overt and subclinical hypothyroidism as compared with the control group (0.7 ± 0.2 and 0.6 ± 0.2 mm respectively vs 0.45 ± 0.07 mm, P < 0.001 for both). The percent of change in blood flow following heat-mediated vasodilation was significantly impaired in patients with overt and subclinical hypothyroidism as compared with the control group (328 ± 17 and 545 ± 406% respectively vs 898 ± 195%, P < 0.001 for both). The impairment was more significant in overt as compared with subclinical hypothyroidism (P = 0.014). CIMT negatively correlated with percent of change in blood flow following heat-mediated vasodilation in patients with overt and subclinical hypothyroidism (P < 0.001 for both). We concluded that CIMT is significantly higher in patients with overt and subclinical hypothyroidism compared with normal control subjects. Impairment of endothelial function is a contributing factor to the increased risk of atherosclerosis in both groups of patients.

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Chiara Mele Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
Division of General Medicine, Istituto Auxologico Italiano, IRCCS, S. Giuseppe Hospital, Piancavallo di Oggebbio (VB), Italy

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Maria Teresa Samà Division of Endocrinology, University Hospital ‘Maggiore della Carità’, Novara, Italy

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Alessandro Angelo Bisoffi Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy

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Marina Caputo Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy

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Valentina Bullara Division of Endocrinology, University Hospital ‘Maggiore della Carità’, Novara, Italy

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Stefania Mai Laboratory of Metabolic Research, Istituto Auxologico Italiano, IRCCS, S. Giuseppe Hospital, Piancavallo di Oggebbio (VB), Italy

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Gillian Elisabeth Walker Department of Health Sciences, University of Piemonte Orientale, Novara, Italy

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Flavia Prodam Department of Health Sciences, University of Piemonte Orientale, Novara, Italy

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Paolo Marzullo Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
Division of General Medicine, Istituto Auxologico Italiano, IRCCS, S. Giuseppe Hospital, Piancavallo di Oggebbio (VB), Italy

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Gianluca Aimaretti Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy

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Loredana Pagano Division of Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
Division of Endocrinology, Diabetology and Metabolism, Department of Medical Sciences, University of Turin, Turin, Italy

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The associative link relating insulin resistance (IR) and adipokines to the occurrence and phenotype of differentiated thyroid cancer (DTC) is unknown. The aim of this study was to evaluate the relationship between IR and adipokines in DTC patients, as compared with carriers of benign thyroid diseases (BTD) and healthy controls. This observational study enrolled 77 subjects phenotyped as DTC (N = 30), BTD (N = 27) and healthy subjects (N = 20). Each subject underwent preoperative analysis of anthropometric parameters, thyroid function and autoimmunity, insulin resistance (HOMA-IR) and levels of unacylated (UAG) and acylated ghrelin (AG), obestatin, leptin and adiponectin. Multivariate regression models were used to test the predictive role of metabolic correlates on thyroid phenotypes and DTC extension. The three groups showed similar age, gender distribution, smoking habit, BMI and thyroid parameters. Obestatin was significantly higher in DTC group compared to BTD (P < 0.05) and control subjects (P < 0.0001). DTC and BTD groups showed higher levels of UAG (P < 0.01) and AG (P < 0.05). Leptin levels were comparable between groups, whereas adiponectin levels were lower in DTC compared to BTD group (P < 0.0001) and controls (P < 0.01). In parallel, HOMA-IR was higher in DTC than BTD (P < 0.05) and control group (P < 0.01). Stepwise multivariable regression analysis showed that obestatin and UAG were independent predictors of DTC (P = 0.01 for both). In an analysis restricted to the DTC group, obestatin levels were associated with the absence of lymph node metastases (P < 0.05). Our results highlight a potential association between metabolic setting, circulating adipokines and thyroid cancer phenotype.

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Shin-ya Ueda Department of Acupuncture, Morinomiya University of Medical Sciences, Osaka, Japan

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Hidehiro Nakahara Department of Acupuncture, Morinomiya University of Medical Sciences, Osaka, Japan

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Eriko Kawai Department of Environmental Physiology for Exercise, Osaka City University Graduate School of Medicine, Osaka, Japan

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Tatsuya Usui Department of Elementary and Preschool Education, Osaka Seikei College, Osaka, Japan

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Shintaro Tsuji Department of Elementary and Preschool Education, Osaka Seikei College, Osaka, Japan

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Tadayoshi Miyamoto Department of Acupuncture, Morinomiya University of Medical Sciences, Osaka, Japan

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The effects of water exercise on gut hormone concentrations and appetite currently remain unclear. The aim of the present study was to investigate the effects of treadmill walking in water on gut hormone concentrations and appetite. Thirteen men (mean ± s.d. age: 21.6 ± 2.2 years, body mass index: 22.7 ± 2.8 kg/m2, peak oxygen uptake (VO2peak): 49.8 ± 7.8 mL/kg per min) participated in the walking in water and on land challenge. During the study period, ratings of subjective feelings of hunger, fullness, satiety and motivation to eat were reported on a 100-mm visual analog scale. A test meal was presented after walking, and energy intake (EI) was calculated. Blood samples were obtained during both trials to measure glucagon-like peptide-1 (GLP-1), peptide YY (PYY) and acylated ghrelin (AG) concentrations. Hunger scores (How hungry do you feel?) were significantly lower during the water trial than during the land trial (P < 0.05). No significant differences were observed in EI between water and land trials. GLP-1 concentrations were significantly higher in the water trial than in the land trial (P < 0.05). No significant differences were observed in PYY concentrations between water and land trials. AG concentrations were significantly lower in the water trial than in the land trial (P < 0.01). In conclusion, changes in gut hormone concentrations during walking in water contribute to the exercise-induced suppression of appetite and provide novel information on the influence of walking in water on the acute regulation of appetite.

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Dandan Hu D Hu, Department of Endocrinology, Suzhou Municipal Hospital, Suzhou, China

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Xiangguo Cong X Cong, Department of Endocrinology, The Affiliated Suzhou Hospital of Nanjing Medical University, suzhou, China

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Beibei Gao B Gao, Department of Endocrinology, Suzhou Municipal Hospital, Suzhou, China

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Ying Wu Y Wu, Department of Endocrinology, Suzhou Municipal Hospital, Suzhou, China

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Qiong Shen Q Shen, Department of Endocrinology, Suzhou Municipal Hospital, Suzhou, China

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Lei Chen L Chen, The Affiliated Suzhou Hospital of Nanjing Medical University, 苏州, 2100000, China

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Background:

Evidence has demonstrated that visceral fat area (VFA) and subcutaneous fat area (SFA) had different influences on cardiovascular disease (CVD) risk in patients with type 2 diabetes mellitus (T2DM). We aimed to investigate the relationship between the visceral fat area (VFA) to subcutaneous fat area (SFA) ratio (V/S) and carotid atherosclerosis (CAS) in patients with T2DM.

Methods:

From January 2018 to May 2023, 1,838 patients with T2DM admitted to the National Metabolic Management Centre in our hospital were assigned to two groups based on comorbid CAS. Dual bioelectrical impedance analysis was used to measure the VAF and SFA, and the V/S was calculated. Patient characteristics and serum biochemical indices were compared between groups. Factors influencing comorbid CAS were determined, and correlations between V/S and other clinical indices were analyzed.

Results:

The group with comorbid CAS included 858 individuals and 980 without comorbid CAS. Those with comorbid CAS were older and had a longer disease duration, more significant systolic blood pressure, and greater V/S. The proportions of patients with comorbid hypertension increased significantly with the V/S ratio. The V/S ratio positively correlated with triglyceride (TG), low-density lipoprotein cholesterol levels, and waist circumference. According to binary logistic regression analysis, V/S was an independent risk factor for CAS.

Conclusion:

Elevated V/S is an independent risk factor for CAS in patients with T2DM.

Open access
Emmanuelle Noirrit Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France
Faculté de Chirurgie Dentaire, Université de Toulouse III, Toulouse, France

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Mélissa Buscato Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France

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Marion Dupuis Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France

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Bernard Payrastre Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France
CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France

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Coralie Fontaine Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France

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Jean-François Arnal Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France

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Marie-Cécile Valera Inserm U1048 (I2MC), CHU de Toulouse and Université Toulouse III, I2MC, Toulouse, France
Faculté de Chirurgie Dentaire, Université de Toulouse III, Toulouse, France

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Estrogen–progestin therapy was previously considered as the standard of care for managing bothersome symptoms associated with menopause, but it increases risks of breast cancer and of thromboembolism. The combination of conjugated estrogen (CE) with bazedoxifene (BZA) named tissue-selective estrogen complex (TSEC) was designed to minimize or even abrogate the undesirable effects on breast, while maintaining the beneficial effects such as prevention of osteoporosis and suppression of climacteric symptoms. The risk on thromboembolism associated with TSEC is unknown, although the clinical available data are reassuring. The aim of this study was to define the impact of a chronic administration of CE, BZA or CE + BZA on hemostasis and thrombosis in ovariectomized mice. As expected, CE, but not BZA neither CE + BZA, induced uterine and vagina hypertrophy. As previously demonstrated for 17β-estradiol (E2), we found that CE (i) increased tail-bleeding time, (ii) prevented occlusive thrombus formation in injured carotid artery and (iii) protected against collagen/epinephrine-induced thromboembolism. Thus, whereas BZA antagonized CE action on reproductive tissues, it had no impact on the effect of CE on hemostasis, thromboembolism and arterial thrombosis in mice. CE + BZA shared the anti-thrombotic actions of CE in these mouse models. If a similar process is at work in women, CE combined with BZA could contribute to minimize the risk of thrombosis associated with hormone replacement therapy.

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