The crosstalk between gut microbiota, intestinal immunological niche and visceral adipose tissue as a new model for the pathogenesis of metabolic and inflammatory diseases: the paradigm of type 2 diabetes mellitus

2022 ◽  
Vol 29 ◽  
Author(s):  
Cianci Rossella ◽  
Franza Laura ◽  
Massaro Maria Grazia ◽  
Borriello Raffaele ◽  
Tota Antonio ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Gut Microbiota ◽  
Visceral Adipose Tissue ◽  
Bacterial Species ◽  
Hormone Secretion ◽  
Mucosal Barrier ◽  
Sexual Hormones ◽  
Gut Dysbiosis ◽  
Visceral Adipose

Abstract: Gut microbiota (GM) comprises more than one thousand microorganisms between bacterial species, viruses, fungi, and protozoa, and represents the main actor of a wide net of molecular interactions, involving, among others, the endocrine system, immune responses, and metabolism. GM influences many endocrine functions such as adrenal steroidogenesis, thyroid function, sexual hormones, IGF-1 pathway and peptides produced in gastrointestinal system. It is fundamental in glycaemic control and obesity, while also exerting an important function in modulating the immune system and associated inflammatory disease. The result of this crosstalk in gut mucosa is the formation of the intestinal immunological niche. Visceral adipose tissue (VAT) produces about 600 different peptides, it is involved in lipid and glucose metabolism and in some immune reactions through several adipokines. GM and VAT interact in a bidirectional fashion: while gut dysbiosis can modify VAT adipokines and hormone secretion, VAT hyperplasia modifies GM composition. Acquired or genetic factors leading to gut dysbiosis or increasing VAT (i.e., Western diet) induce a proinflammatory condition, which plays a pivotal role in the development of dysmetabolic and immunologic conditions, such as diabetes mellitus. Diabetes is clearly associated with specific patterns of GM alterations, with an abundance or reduction of GM species involved in controlling mucosal barrier status, glycaemic levels and exerting a pro- or anti-inflammatory activity. All these factors could explain the higher incidence of several inflammatory conditions in Western countries; furthermore, besides the specific alterations observed in diabetes, this paradigm could represent a common pathway acting in many metabolic conditions and could pave the way to a new, interesting therapeutic approach.

Obesity and its effects on the esophageal mucosal barrier

2021 ◽  
Vol 321 (3) ◽  
pp. G335-G343
Author(s):  
Shere Paris ◽  
Rebecca Ekeanyanwu ◽  
Yuwei Jiang ◽  
Daniel Davis ◽  
Stuart Jon Spechler ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Gastroesophageal Reflux ◽  
Visceral Adipose Tissue ◽  
Esophagogastric Junction ◽  
Mechanical Effect ◽  
Mucosal Barrier ◽  
Abdominal Pressure ◽  
Esophageal Mucosa ◽  
Barrier Integrity ◽  
Visceral Adipose

Obesity is associated with gastroesophageal reflux disease (GERD) and its complications including reflux esophagitis, Barrett’s esophagus, and esophageal adenocarcinoma. Traditionally, these associations have been attributed to the mechanical effect of abdominal fat in increasing intra-abdominal pressure, thereby promoting gastroesophageal reflux and causing disruption of antireflux mechanisms at the esophagogastric junction. However, recent studies suggest that visceral adipose tissue (VAT) produces numerous cytokines that can cause esophageal inflammation and impair esophageal mucosal barrier integrity through reflux-independent mechanisms that render the esophageal mucosa especially susceptible to GERD-induced injury. In this report, we review mechanisms of esophageal mucosal defense, the genesis and remodeling of visceral adipose tissue during obesity, and the potential role of substances produced by VAT, especially the VAT that encircles the esophagogastric junction, in the impairment of esophageal mucosal barrier integrity that leads to the development of GERD complications.

scholarly journals Visceral Adipose Tissue Depth in Early Pregnancy and Gestational Diabetes Mellitus - a Cohort Study

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
João Guilherme Alves ◽  
Alex Sandro Rolland Souza ◽  
José Natal Figueiroa ◽  
Carla Adriane Leal de Araújo ◽  
Angélica Guimarães ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Cohort Study ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Visceral Adipose Tissue ◽  
Early Pregnancy ◽  
Visceral Adipose

Cross-talk between fetal membranes and visceral adipose tissue involves HMGB1–RAGE and VIP–VPAC2 pathways in human gestational diabetes mellitus

2019 ◽  
Vol 56 (6) ◽  
pp. 681-689 ◽  
Author(s):  
Carmela Santangelo ◽  
Tiziana Filardi ◽  
Giuseppina Perrone ◽  
Marianna Mariani ◽  
Emanuela Mari ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Visceral Adipose Tissue ◽  
Cross Talk ◽  
Fetal Membranes ◽  
Visceral Adipose

Subclinical Inflammation and Lymphocytes in Subcutaneous and Visceral Adipose Tissue—The Influence of Pregnancy and Gestational Diabetes Mellitus

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1413-P
Author(s):  
ANNA CINKAJZLOVA ◽  
KATEřINA ANDERLOVÁ ◽  
PATRIK SIMJAK ◽  
ZDENA LACINOVÁ ◽  
JANA KLOUCKOVA ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Visceral Adipose Tissue ◽  
Subclinical Inflammation ◽  
Visceral Adipose

Subclinical Inflammation and Adipose Tissue Lymphocytes in Pregnant Females With Gestational Diabetes Mellitus

2020 ◽  
Vol 105 (11) ◽  
Author(s):  
Anna Cinkajzlová ◽  
Kateřina Anderlová ◽  
Patrik Šimják ◽  
Zdeňka Lacinová ◽  
Jana Kloučková ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Pregnant Women ◽  
Visceral Adipose Tissue ◽  
Subclinical Inflammation ◽  
Serum Samples ◽  
Pregnant Females ◽  
Visceral Adipose

Abstract Context Gestational diabetes mellitus (GDM) is accompanied by subclinical inflammation; however, little is known about local inflammation in adipose tissue and placenta. Objective To analyze systemic and local subclinical inflammation and adipose tissue lymphocyte content and phenotype in pregnant women with and without GDM. Design Observational study. Settings Academic hospital. Patients Twenty-one pregnant women with GDM (GDM group), 16 pregnant women without GDM (non-GDM group) and 15 nonpregnant control women (N group). Interventions Serum samples taken at 28 to 32 (visit 1 [V1]) and 36 to 38 (V2) gestational weeks and 6 to 12 months after delivery (V3) in the GDM and non-GDM group and before elective gynecological surgery in the N group. Subcutaneous (SAT) and visceral adipose tissue (VAT) obtained during cesarean delivery or surgery. Main Outcome Measures Serum levels and adipose tissue expression of proinflammatory cytokines, adipose tissue lymphocyte content and phenotype (for a subset of GDM and non-GDM subjects). Results Accented proinflammatory state in GDM was documented by increased circulating tumor necrosis factor-α (TNF-α) levels. In both groups of pregnant females total lymphocytes were higher in VAT compared to SAT. In GDM subjects B cells and NKT cells were higher in SAT compared to VAT and T helper cells were increased relative to SAT of non-GDM group, while no intercompartmental adipose tissue differences were seen in non-GDM women. Conclusions Pregnant females had higher total lymphocyte count in VAT relative to SAT regardless of GDM. In addition to increased systemic subclinical inflammation, GDM was associated with significant differences in lymphocyte composition between subcutaneous and visceral adipose tissue depots.

scholarly journals Intraperitoneal, but not retroperitoneal, visceral adipose tissue is associated with diabetes mellitus: a cross-sectional, retrospective pilot analysis

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Muhei Tanaka ◽  
Hiroshi Okada ◽  
Yoshitaka Hashimoto ◽  
Muneaki Kumagai ◽  
Hiromi Nishimura ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Adipose Tissue ◽  
Visceral Adipose Tissue ◽  
Lumbar Vertebrae ◽  
Area Ratio ◽  
Adverse Outcomes ◽  
Cross Sectional ◽  
Area Index ◽  
Unenhanced Computed Tomography ◽  
Visceral Adipose

Abstract Aim Diabetes mellitus (DM) is associated with adverse outcomes, and visceral adipose tissue (VAT), classified into intraperitoneal VAT (IVAT) and retroperitoneal VAT (RVAT), is associated with insulin resistance. This study aimed to evaluate the association of IVAT and RVAT with the prevalence or incidence of DM. Methods In this cross-sectional, retrospective, cohort study, the prevalence and incidence of DM was analyzed in 803 and 624 middle-aged Japanese participants, respectively. The cross-sectional area of the abdominal adipose tissue was evaluated from an unenhanced computed tomography scan at the third lumbar vertebrae, and the IVAT or RVAT was analyzed using specialized software. The areas were normalized for the square value of the participants’ height in meters and described as the IVAT or RVAT area index. Results The IVAT area index (adjusted odds ratio [OR], 1.04; 95% confidence intervals [CI], 1.02–1.07, per 1.0 cm2/m2) or IVAT/RVAT area ratio (1.89; 1.23–2.85, per 1.0) was independently associated with the prevalence of DM, whereas the RVAT area index was not. During a follow-up (mean) of 3.7 years, 30 participants were diagnosed with DM. The IVAT area index (adjusted hazards ratio [HR], 1.02; 95% CI 1.003–1.04, per 1.0 cm2/m2) or IVAT/RVAT area ratio (2.25; 1.40–3.43, per 1.0) was independently associated with the incidence of DM, whereas the RVAT area index was not. Conclusions IVAT, but not RVAT, is associated with the prevalence or incidence of DM.

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