leptin and Aortic-Aneurysm--Abdominal

leptin has been researched along with Aortic-Aneurysm--Abdominal* in 5 studies

Reviews

1 review(s) available for leptin and Aortic-Aneurysm--Abdominal

ArticleYear
[Effects of Leptin and Leptin-associated Signaling Pathways on the Occurrence and Progression of Abdominal Aortic Aneurysms].
    Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae, 2022, Volume: 44, Issue:6

    Abdominal aortic aneurysm(AAA) is a chronic dilated artery disease induced by atherosclerosis,infection,trauma and other related causes.The available studies about AAA mainly focus on the inflammatory response,senility,and microenvironmental changes,while the research on the metabolic changes such as glucose metabolism and lipid metabolism remains to be conducted.As a critical regulatory factor in endocrine,glucose,and lipid metabolisms,leptin is associated with a variety of signaling pathways such as adenosine monophosphate-activated protein kinase,Janus kinase/signal transducer and activator of transcription,and cytokine-cytokine receptor,as demonstrated by the KEGG pathway enrichment analysis.Moreover,these signaling pathways are generally involved in regulating the occurrence of AAA.In addition,leptin affects the occurrence of a variety of diseases such as obesity,diabetes,and hyperlipidemia,which contribute to the formation of AAA.Diabetes might be a protective factor for the formation of AAA,while the relationship of hyperlipidemia and obesity with the formation of AAA remains unclear.Therefore,leptin might play an essential role in the formation of AAA.Further studies about the effect of leptin on AAA may provide the potential research direction and facilitate the discovery of therapeutic targets.

    Topics: Aorta, Abdominal; Aortic Aneurysm, Abdominal; Diabetes Mellitus; Humans; Leptin; Obesity; Signal Transduction

2022

Other Studies

4 other study(ies) available for leptin and Aortic-Aneurysm--Abdominal

ArticleYear
Melanocortin-4 receptor in macrophages attenuated angiotensin II-induced abdominal aortic aneurysm in mice.
    Scientific reports, 2023, 11-13, Volume: 13, Issue:1

    Obesity is recognized as an independent risk factor for abdominal aortic aneurysm (AAA). While mutations in the melanocortin-4 receptor (MC4R) gene is the most common cause of obesity caused by mutations in a single gene, the link between MC4R function and vascular disease has still remained unclear. Here, by using melanocortin-4 receptor (MC4R) deficient mice, we confirmed MC4R deficiency promotes AAA and atherosclerosis. We demonstrated the contribution of two novel factors towards vascular vulnerability in this model: leptin signaling in vascular smooth muscle cells (VSMCs) and loss of MC4R signaling in macrophages. Leptin was shown to promote vascular vulnerability via PI3K-dependent upregulation of Spp1 expression in VSMC. Additionally, Ang II-induced AAA incidence was significantly reduced when MC4R gene expression was myeloid cell-specifically rescued in MC4R deficient (MC4R

    Topics: Angiotensin II; Animals; Aortic Aneurysm, Abdominal; Disease Models, Animal; Leptin; Macrophages; Mice; Mice, Inbred C57BL; Mice, Knockout; NF-kappa B; Obesity; Phosphatidylinositol 3-Kinases; Receptor, Melanocortin, Type 4

2023
Recombinant leptin attenuates abdominal aortic aneurysm formation in angiotensin II-infused apolipoprotein E-deficient mice.
    Biochemical and biophysical research communications, 2018, 09-10, Volume: 503, Issue:3

    Vascular disease can manifest as stenotic plaques or ectatic aneurysms. Human abdominal aortic aneurysms (AAA) comprise an inflammatory disease characterized by the predominance of T helper type 2 (Th2) cytokine expression. Leptin has been clearly demonstrated to play an important role in regulating Th0 cell to Th1. So, we hypothesize that leptin has a protective effect on aneurysm formation. In this study, we demonstrated that intraperitoneal injection of leptin attenuated Ang II-induced AAA formation in ApoE-/- mice with no effect on serum lipids and systolic blood pressure. To investigate the mechanisms involved, we found that leptin pretreatment exhibited decreased protein expression of matrix metalloproteinase 2 (MMP-2) and MMP-9 and increased transforming growth factor-β1 (TGF-β1). We also examined potential mechanism of leptin as a modulator of the immune response. Our results proved that pretreatment with leptin downregulated protein expression of Th2 cytokine IL-4 and mRNA levels of GATA-3, the key transcription factor for Th2 polarization, and upregulated Th1 cytokine INF-γ and T-bet, the key transcription factor for Th1 polarization. Taken together, leptin, with the effect of regulation of Th1/Th2 cytokines, may have therapeutic potential for the treatment of AAA. Leptin may constitute a novel therapeutic strategy to prevent AAA formation.

    Topics: Angiotensin II; Animals; Aortic Aneurysm, Abdominal; Apolipoproteins E; Inflammation; Injections, Intraperitoneal; Leptin; Mice; Mice, Inbred C57BL; Mice, Knockout; Recombinant Proteins; T-Lymphocytes; Th1 Cells

2018
Locally applied leptin induces regional aortic wall degeneration preceding aneurysm formation in apolipoprotein E-deficient mice.
    Arteriosclerosis, thrombosis, and vascular biology, 2013, Volume: 33, Issue:2

    Leptin promotes atherosclerosis and vessel wall remodeling. As abdominal aortic aneurysm (AAA) formation involves tissue remodeling, we hypothesized that local leptin synthesis initiates and promotes this process.. Human surgical AAA walls were analyzed for antigen and mRNA levels of leptin and leptin receptor, as well as mRNA for matrix metalloproteinases (MMP)-9 and MMP-12. Leptin and leptin receptor antigen were evident in all AAAs, and leptin, MMP-9, and MMP-12 mRNA was increased relative to age-matched nondilated controls. To simulate in vivo local leptin synthesis, ApoE(-/-) mice were subjected to a paravisceral periaortic application of low-dose leptin. Leptin-treated aortas exhibited decreased transforming growth factor-β and increased MMP-9 mRNA levels 5 days after surgery, and leptin receptor mRNA was upregulated by day 28. Serial ultrasonography demonstrated accelerated regional aortic diameter growth after 28 days, correlating with local medial degeneration, increased MMP-9, MMP-12, and periadventitial macrophage clustering. Furthermore, the combination of local periaortic leptin and systemic angiotensin II administration augmented medial MMP-9 synthesis and aortic aneurysm size.. Leptin is locally synthesized in human AAA wall. Paravisceral aortic leptin in ApoE(-/-) mice induces local medial degeneration and augments angiotensin II-induced AAA, thus suggesting novel mechanistic links between leptin and AAA formation.

    Topics: Angiotensin II; Animals; Aorta, Abdominal; Aortic Aneurysm, Abdominal; Apolipoproteins E; Delayed-Action Preparations; Dilatation, Pathologic; Disease Models, Animal; Humans; Leptin; Macrophages; Male; Matrix Metalloproteinase 12; Matrix Metalloproteinase 9; Mice; Mice, Inbred C57BL; Mice, Knockout; Receptors, Leptin; RNA, Messenger; Time Factors; Transforming Growth Factor beta; Ultrasonography

2013
Obesity, adipokines, and abdominal aortic aneurysm: Health in Men study.
    Circulation, 2007, Nov-13, Volume: 116, Issue:20

    Obesity is associated with occlusive artery disease but is not considered a risk factor for abdominal aortic aneurysm (AAA). We investigated the association between anthropometric measures of obesity, serum adipokines, and AAA.. As part of a population study, we screened 12,203 men 65 to 83 years of age for AAA using ultrasound; 875 had an AAA (> or = 30 mm). Cardiovascular risk factors and waist and hip circumference were recorded. Serum adipokines were measured in 952 men, 318 of whom had an AAA. Waist circumference (odds ratio [OR], 1.14; 95% confidence interval [CI], 1.06 to 1.22) and waist-to-hip ratio (OR, 1.22; 95% CI, 1.09 to 1.37) were independently associated with AAA after adjustment for other known risk factors. The association was stronger for AAA > or = 40 mm (waist-to-hip ratio: OR, 1.53; 95% CI, 1.26 to 1.85). Serum resistin concentration was strongly independently associated with AAA (OR, 1.53; 95% CI, 1.32 to 1.76) and aortic diameter (beta=0.19, P<0.0001). Serum adiponectin was associated with AAA > or = 30 mm (OR, 1.26; 95% CI, 1.07 to 1.50) but not AAA > or = 40 mm (OR, 1.03; 95% CI, 0.77 to 1.39). Serum leptin was not associated with AAA.. Measures of obesity are independently associated with AAA. Serum resistin concentrations were more strongly associated with aortic diameter than adipokines that are more intimately associated with adiposity. Further studies are required to investigate the mechanisms linking resistin and AAA.

    Topics: Adipokines; Adiponectin; Aged; Aged, 80 and over; Aortic Aneurysm, Abdominal; Blood Glucose; C-Reactive Protein; Humans; Leptin; Male; Men's Health; Obesity; Resistin; Risk Factors

2007
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