We tested the hypothesis that muscle sympathetic nerve activity (MSNA) would not differ in subcutaneously obese (SUBOB) and nonobese (NO) men with similar levels of abdominal visceral fat despite higher plasma leptin concentrations in the former. We further hypothesized that abdominal visceral fat would be the strongest body composition- or regional fat distribution-related correlate of MSNA among these individuals. To accomplish this, we measured MSNA (via microneurography), body composition (via dual-energy X-ray absorptiometry), and abdominal fat distribution (via computed tomography) in 15 NO (body mass index 0.05, respectively) despite approximately 2.6-fold higher (P < 0.05) plasma leptin concentration in the SUBOB men. Furthermore, abdominal visceral fat was the only body composition- or regional fat distribution-related correlate (r = 0.45; P < 0.05) of MSNA in the pooled sample. In addition, abdominal visceral fat was related to MSNA in NO (r = 0.58; P = 0.0239) but not SUBOB (r = 0.39; P = 0.3027) men. Taken together with our previous observations, our findings suggest that the relation between obesity and MSNA is phenotype dependent. The relation between abdominal visceral fat and MSNA was evident in NO but not in SUBOB men and at levels of abdominal visceral fat below the level typically associated with elevated cardiovascular and metabolic disease risk. Our observations do not support an obvious role for leptin in contributing to sympathetic neural activation in human obesity and, in turn, are inconsistent with the concept of selective leptin resistance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1152/ajpheart.01046.2003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Higher abdominal fat area associates with lower donor kidney function before and after living kidney donation.
Sci Rep
December 2024
Department of Surgery, Division of Transplant Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Central body fat distribution affects kidney function. Abdominal fat measurements using computed tomography (CT) may prove superior in assessing body composition-related kidney risk in living kidney donors. This retrospective cohort study including 550 kidney donors aimed to determine the association between CT-measured abdominal fat areas and kidney function before and after donor nephrectomy.
View Article and Find Full Text PDFMulti-omics profiling reveals altered mitochondrial metabolism in adipose tissue from patients with metabolic dysfunction-associated steatohepatitis.
EBioMedicine
December 2024
Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, Universitat Rovira i Virgili, Institut d'Investigació Sanitària Pere Virgili, Reus, Spain; Department of Medicine and Surgery, Faculty of Medicine, Universitat Rovira i Virgili, Reus, Spain; The Campus of International Excellence Southern Catalonia, Tarragona, Spain. Electronic address:
Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) and its more severe form steatohepatitis (MASH) contribute to rising morbidity and mortality rates. The storage of fat in humans is closely associated with these diseases' progression. Thus, adipose tissue metabolic homeostasis could be key in both the onset and progression of MASH.
View Article and Find Full Text PDFA case report of a rare etiology of an abdominal cystic lesion in adults: Peritoneal inclusion cysts.
Int J Surg Case Rep
December 2024
Department of Visceral and Digestive Surgery, Monastir University Hospital, Monastir, Tunisia.
Introduction And Importance: Peritoneal inclusion cysts (PICs), also known as peritoneal mesothelial cysts, are rare, benign cystic lesions primarily occurring in the abdominopelvic cavity of premenopausal women with histories of pelvic surgery or inflammation. These cysts can present with nonspecific symptoms and may mimic other abdominal pathologies, making diagnosis challenging.
Case Presentation: A 41-year-old male with no significant medical history, who experienced progressive nonspecific abdominal pain over several months.
The interplay of factors in metabolic syndrome: understanding its roots and complexity.
Mol Med
December 2024
Center for Cancer Immunology, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
Metabolic syndrome (MetS) is an indicator and diverse endocrine syndrome that combines different metabolic defects with clinical, physiological, biochemical, and metabolic factors. Obesity, visceral adiposity and abdominal obesity, dyslipidemia, insulin resistance (IR), elevated blood pressure, endothelial dysfunction, and acute or chronic inflammation are the risk factors associated with MetS. Abdominal obesity, a hallmark of MetS, highlights dysfunctional fat tissue and increased risk for cardiovascular disease and diabetes.
View Article and Find Full Text PDFAge-dependent changes in diameters of abdominal visceral arteries in children.
Jpn J Radiol
December 2024
Faculty of Medicine, Department of Pediatric Surgery, Van Yüzüncü Yil University, Van, Turkey.
Purpose: The diameters of the abdominal aorta and its branches are affected by demographic properties of patients like age, sex or body mass index. Some researchers use the body of the first lumbar vertebra (L1) as an anatomical indicator to create an exact standard for diagnosing arterial aneurysms or stenoses. In this regard, this work designed to uncover relations of abdominal visceral arteries with L1 in normal children using their abdominopelvic computed tomography images.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!