title: Characteristic expression of extracellular matrix in subcutaneous adipose tissue development and adipogenesis; comparison with visceral adipose tissue.
abstract: Adipose tissue is a connective tissue specified for energy metabolism and endocrines, but functional differences between subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) have not been fully elucidated. To reveal the physiological role of SAT, we characterized in vivo tissue development and in vitro adipocyte differentiation. In a DNA microarray analysis of SAT and VAT in Wistar rats, functional annotation clusters of extracellular matrix (ECM)-related genes were found in SAT, and major ECM molecules expressed in adipose tissues were profiled. In a histological analysis and quantitative expression analysis, ECM expression patterns could be classified into two types: (i) a histogenesis-correlated type such as type IV and XV collagen, and laminin subunits, (ii) a high-SAT expression type such as type I, III, and V collagen and minor characteristic collagens. Type (i) was related to basal membrane and up-regulated in differentiated 3T3-L1 cells and in histogenesis at depot-specific timings. In contrast, type (ii) was related to fibrous forming and highly expressed in 3T3-L1 preadipocytes. Exceptionally, fibronectin was abundant in developed adipose tissue, although it was highly expressed in 3T3-L1 preadipocytes. The present study showed that adipose tissues site-specifically regulate molecular type and timing of ECM expression, and suggests that these characteristic ECM molecules provide a critical microenvironment, which may affect bioactivity of adipocyte itself and interacts with other tissues. It must be important to consider the depot-specific property for the treatment of obesity-related disorders, dermal dysfunction and for the tissue regeneration.
authors: Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-gun, Tochigi, 321-3497, Japan.
authors: Shinobu
authors: S
authors: Mori
authors: Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-gun, Tochigi, 321-3497, Japan.
authors: Satomi
authors: S
authors: Kiuchi
authors: Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-gun, Tochigi, 321-3497, Japan.
authors: Atsushi
authors: A
authors: Ouchi
authors: Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-gun, Tochigi, 321-3497, Japan.
authors: Tadashi
authors: T
authors: Hase
authors: Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-gun, Tochigi, 321-3497, Japan.
authors: Takatoshi
authors: T
authors: Murase
mesh_terms: D041721:3T3-L1 Cells; D050156:Adipogenesis / Q000502:physiology*; D000818:Animals; D002454:Cell Differentiation / Q000502:physiology; D002478:Cells, Cultured; D005109:Extracellular Matrix / Q000378:metabolism*; D008297:Male; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D017208:Rats, Wistar; D050151:Subcutaneous Fat / Q000378:metabolism*
keywords: adipocyte; differentiation.; extracellular matrix; subcutaneous; visceral