Adipose Tissue Remodeling, Chronic Inflammation and T-cell-macrophage Interactions in Obesity Visualized by in vivo Molecular Imaging Method

2009 ◽  
Vol 58 (S2) ◽  
pp. S234-S238
Author(s):  
Satoshi Nishimura ◽  
Mika Nagasaki ◽  
Ichiro Manabe ◽  
Koji Eto ◽  
Takashi Kadowaki ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
T Cell ◽  
Molecular Imaging ◽  
Chronic Inflammation ◽  
Tissue Remodeling ◽  
Imaging Method ◽  
Adipose Tissue Remodeling

scholarly journals Obese adipose tissue remodeling, malfunctioning, and chronic inflammation visualized by in vivo molecular imaging

2009 ◽  
Vol 29 (2) ◽  
pp. 118-122
Author(s):  
Satoshi Nishimura ◽  
Mika Nagasaki ◽  
Ichiro Manabe ◽  
Takashi Kadowaki ◽  
Ryozo Nagai
Keyword(s):  
Adipose Tissue ◽  
Molecular Imaging ◽  
Chronic Inflammation ◽  
Tissue Remodeling ◽  
Adipose Tissue Remodeling

Abstract 5466: In Vivo Molecular Imaging Revealed Chronic Inflammation and Increased Adhesion Molecules in Obese Adipose Tissue in Mice

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Satoshi Nishimura ◽  
Mika Nagasaki ◽  
Ichiro Manabe ◽  
Kinya Seo ◽  
Takashi Kadowaki ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Chronic Inflammation ◽  
Adhesion Molecules ◽  
Visceral Adipose Tissue ◽  
Ex Vivo ◽  
Subcutaneous Fat ◽  
Therapeutic Interventions ◽  
Imaging Method ◽  
Visceral Adipose

Metabolic syndrome is a major risk factor of cardiovascular events, and obese visceral adipose tissue remodeling and malfunctioning based on chronic inflammation plays a central role. To assess dynamic multi-cellular interplay, a novel ex vivo (a–c) and in vivo (d–f) adipose tissue imaging method was developed. We found close spatial and temporal interrelationships between angiogenesis and adipogenesis, and both were augmented in obese adipose (c,arrow). In addition, we found increased leukocyte-platelet-endothelial cell interactions in the micro-circulation of obese visceral adipose that were indicative of activation of the leukocyte adhesion cascade, a hallmark of inflammation (e,f). Both macrophages and endothelial cells showed increased adhesion molecules including ICAM-1 and Selectin families, and P-selectin positive platelets were increased locally in obese adipose. Up-regulated expression of adhesion molecules on multiple cell types suggests their increased interactions contribute to local activation of inflammatory processes within visceral obese adipose tissue. Interestingly, the heightened leukocyte-platelet-endothelial interactions were not observed in obese subcutaneous fat pads. Our results demonstrated the power of our imaging technique to analyze complex inflammatory cellular interplays in vivo and to evaluate new therapeutic interventions against them. Results also indicate that visceral adipose tissue obesity is an inflammatory disease.

scholarly journals Adipose Tissue Remodeling in Children: The Link between Collagen Deposition and Age-Related Adipocyte Growth

2012 ◽  
Vol 97 (4) ◽  
pp. 1320-1327 ◽  
Author(s):  
Charmaine S. Tam ◽  
Joan Tordjman ◽  
Adeline Divoux ◽  
Louise A. Baur ◽  
Karine Clément
Keyword(s):  
Adipose Tissue ◽  
Tissue Remodeling ◽  
Collagen Deposition ◽  
Age Related ◽  
Adipose Tissue Remodeling

scholarly journals Evidence for the Regulatory Role of Lipocalin 2 in High-Fat Diet-Induced Adipose Tissue Remodeling in Male Mice

Endocrinology ◽  
2013 ◽  
Vol 154 (10) ◽  
pp. 3525-3538 ◽  
Author(s):  
Hong Guo ◽  
Merlijn Bazuine ◽  
Daozhong Jin ◽  
Merry M. Huang ◽  
Samuel W. Cushman ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
High Fat Diet ◽  
Adipocyte Differentiation ◽  
Tissue Remodeling ◽  
Peroxisome Proliferator ◽  
Lipocalin 2 ◽  
Peroxisome Proliferator Activated Receptor ◽  
Adipose Tissue Remodeling ◽  
Fat Depot

Lipocalin 2 (Lcn2) has previously been characterized as an adipokine/cytokine playing a role in glucose and lipid homeostasis. In this study, we investigate the role of Lcn2 in adipose tissue remodeling during high-fat diet (HFD)-induced obesity. We find that Lcn2 protein is highly abundant selectively in inguinal adipose tissue. During 16 weeks of HFD feeding, the inguinal fat depot expanded continuously, whereas the expansion of the epididymal fat depot was reduced in both wild-type (WT) and Lcn2−/− mice. Interestingly, the depot-specific effect of HFD on fat mass was exacerbated and appeared more pronounced and faster in Lcn2−/− mice than in WT mice. In Lcn2−/− mice, adipocyte hypertrophy in both inguinal and epididymal adipose tissue was more profoundly induced by age and HFD when compared with WT mice. The expression of peroxisome proliferator-activated receptor-γ protein was significantly down-regulated, whereas the gene expression of extracellular matrix proteins was up-regulated selectively in epididymal adipocytes of Lcn2−/− mice. Consistent with these observations, collagen deposition was selectively higher in the epididymal, but not in the inguinal adipose depot of Lcn2−/− mice. Administration of the peroxisome proliferator-activated receptor-γ agonist rosiglitazone (Rosi) restored adipogenic gene expression. However, Lcn2 deficiency did not alter the responsiveness of adipose tissue to Rosi effects on the extracellular matrix expression. Rosi treatment led to the further enlargement of adipocytes with improved metabolic activity in Lcn2−/− mice, which may be associated with a more pronounced effect of Rosi treatment in reducing TGF-β in Lcn2−/− adipose tissue. Consistent with these in vivo observations, Lcn2 deficiency reduces the adipocyte differentiation capacity of stromal-vascular cells isolated from HFD-fed mice in these cells. Herein Rosi treatment was again able to stimulate adipocyte differentiation to a similar extent in WT and Lcn2−/− inguinal and epididymal stromal-vascular cells. Thus, combined, our data indicate that Lcn2 has a depot-specific role in HFD-induced adipose tissue remodeling.

scholarly journals Tracking Transplanted Stem Cells Using Magnetic Resonance Imaging and the Nanoparticle Labeling Method in Urology

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jae Heon Kim ◽  
Hong J. Lee ◽  
Yun Seob Song
Keyword(s):  
Magnetic Resonance Imaging ◽  
Stem Cells ◽  
Molecular Imaging ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Imaging Techniques ◽  
Image Resolution ◽  
Imaging Method ◽  
Resonance Imaging

A reliablein vivoimaging method to localize transplanted cells and monitor their viability would enable a systematic investigation of cell therapy. Most stem cell transplantation studies have used immunohistological staining, which does not provide information about the migration of transplanted cellsin vivoin the same host. Molecular imaging visualizes targeted cells in a living host, which enables determining the biological processes occurring in transplanted stem cells. Molecular imaging with labeled nanoparticles provides the opportunity to monitor transplanted cells noninvasively without sacrifice and to repeatedly evaluate them. Among several molecular imaging techniques, magnetic resonance imaging (MRI) provides high resolution and sensitivity of transplanted cells. MRI is a powerful noninvasive imaging modality with excellent image resolution for studying cellular dynamics. Several types of nanoparticles including superparamagnetic iron oxide nanoparticles and magnetic nanoparticles have been used to magnetically label stem cells and monitor viability by MRI in the urologic field. This review focuses on the current role and limitations of MRI with labeled nanoparticles for tracking transplanted stem cells in urology.

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