Project description:Dysregulation in adipokine biosynthesis and function contributes to obesity-induced metabolic diseases. However, the identities and functions of many of the obesity-induced secretory molecules remain unknown. This study identified Leucine-rich alpha-2-glycoprotein 1 (LRG1) as an obesity-associated adipokine. The effects of LRG1 deficiency on liver tissue gene expression were tested in current assay.
Project description:Dysregulation in adipokine biosynthesis and function contributes to obesity-induced metabolic diseases. However, the identities and functions of many of the obesity-induced secretory molecules remain unknown. This study identified Leucine-rich alpha-2-glycoprotein 1 (LRG1) as an obesity-associated adipokine. The effects of LRG1 protein treatment on primary hepatocyte gene expression was tested in current assay.
Project description:Dysregulation in adipokine biosynthesis and function contributes to obesity-induced metabolic diseases. However, the identities and functions of many of the obesity-induced secretory molecules remain unknown. In this study, microarray was used to identify genes that are differentially expressed during adipocyte differentiation, further screening based on microarray result identified Leucine-rich alpha-2-glycoprotein 1 (LRG1) as an obesity-associated adipokine. Expression data of pre-adipocytes and mature adipocytes
Project description:While dysregulation of adipocyte endocrine function plays a central role in obesity and its complications, the vast majority of adipokines remain uncharacterized. We employed bio-orthogonal non-canonical amino acid tagging (BONCAT) and mass spectrometry to comprehensively characterize the secretome of murine visceral and subcutaneous white and interscapular brown adipocytes. Over 600 proteins were identified, the majority of which showed cell type-specific enrichment. We here describe a metabolic role for leucine-rich α-2 glycoprotein 1 (LRG1) as an obesity-regulated adipokine secreted by mature adipocytes. LRG1 overexpression significantly improved glucose homeostasis in diet-induced and genetically obese mice. This was associated with markedly reduced white adipose tissue macrophage accumulation and systemic inflammation. Mechanistically, we found LRG1 binds cytochrome c in circulation to dampen its pro-inflammatory effect. These data support a new role for LRG1 as an insulin sensitizer with therapeutic potential given its immunomodulatory function at the nexus of obesity, inflammation, and associated pathology.
Project description:While dysregulation of adipocyte endocrine function plays a central role in obesity and its complications, the vast majority of adipokines remain uncharacterized. We employed bio-orthogonal non-canonical amino acid tagging (BONCAT) and mass spectrometry to comprehensively characterize the secretome of murine visceral and subcutaneous white and interscapular brown adip ocytes. Over 600 proteins were identified, the majority of which showed cell type-specific enrichment. We here describe a metabolic role for leucine-rich α-2 glycoprotein 1 (LRG1) as an obesity-regulated adipokine secreted by mature adipocytes. LRG1 overexpression significantly improved glucose homeostasis in diet-induced and genetically obese mice. This was associated with markedly reduced white adipose tissue macrophage accumulation and systemic inflammation. Mechanistically, we found LRG1 binds cytochrome c in circulation to dampen its pro-inflammatory effect. These data support a new role for LRG1 as an insulin sensitizer with therapeutic potential given its immunomodulatory function at the nexus of obesity, inflammation, and associated pathology.
Project description:To investigate the effect of LRG1 overexpression on gene expression of eWAT from db/db mice, we transduced 4-week-old db/db mice with AAV8-eGFP or AAV8-LRG1-FL and harvested eWAT at 7 weeks and 10 weeks of age. We then performed gene expression profiling analysis using data obtained from RNA-seq of eWAT from eGFP- and LRG1-overexpressing mice at two time points.