scholarly journals Decreased levels of endocytic collagen receptor Endo180 in dermal fibroblasts lead to decreased production of type I collagen and increased expression of matrix metalloproteinase‐1

Author(s):  
Hiroyasu Iwahashi ◽  
Yoshihito Kawashima ◽  
Hitoshi Masaki



1999 ◽  
Vol 274 (36) ◽  
pp. 25371-25378 ◽  
Author(s):  
Ulrike Benbow ◽  
Matthias P. Schoenermark ◽  
Teresa I. Mitchell ◽  
Joni L. Rutter ◽  
Ken-ichi Shimokawa ◽  
...  


2001 ◽  
Vol 270 (1) ◽  
pp. 110-118 ◽  
Author(s):  
Carole Ntayi ◽  
Sandrine Lorimier ◽  
Odile Berthier-Vergnes ◽  
William Hornebeck ◽  
Philippe Bernard


2020 ◽  
Vol 21 (22) ◽  
pp. 8693
Author(s):  
Young Eun Choi ◽  
Min Ji Song ◽  
Mari Hara ◽  
Kyoko Imanaka-Yoshida ◽  
Dong Hun Lee ◽  
...  

Tenascin C (TNC) is an element of the extracellular matrix (ECM) of various tissues, including the skin, and is involved in modulating ECM integrity and cell physiology. Although skin aging is apparently associated with changes in the ECM, little is known about the role of TNC in skin aging. In this study, we found that the Tnc mRNA level was significantly reduced in the skin tissues of aged mice compared with young mice, consistent with reduced TNC protein expression in aged human skin. TNC-large (TNC-L; 330-kDa) and -small (TNC-S; 240-kDa) polypeptides were observed in conditional media from primary dermal fibroblasts. Both recombinant TNC polypeptides, corresponding to TNC-L and TNC-S, increased the expression of type I collagen and reduced the expression of matrix metalloproteinase-1 in fibroblasts. Treatment of fibroblasts with a recombinant TNC polypeptide, corresponding to TNC-L, induced phosphorylation of SMAD2 and SMAD3. TNC increased the level of transforming growth factor-β1 (TGF-β1) mRNA and upregulated the expression of type I collagen by activating the TGF-β signaling pathway. In addition, TNC also promoted the expression of type I collagen in fibroblasts embedded in a three-dimensional collagen matrix. Our findings suggest that TNC contributes to the integrity of ECM in young skin and to prevention of skin aging.



2021 ◽  
Vol 9 ◽  
Author(s):  
Jiejing Yan ◽  
Mimi Hao ◽  
Yu Han ◽  
Jingya Ruan ◽  
Dandan Zheng ◽  
...  

In the process of continuing to investigate ultraviolet b (UVB) irradiation protective constituents from Oplopanax elatus stems, nine new sesquiterpenes, named as eurylosesquiterpenosides A–D (1–4), eurylosesquiterpenols E–I (5–9), and ten known ones (10–19) were gained. Their structures were established by analysis of their NMR spectroscopic data, and electronic circular dichroism calculations were applied to define their absolute configurations. In addition, UVB induced HaCaT cells were used to study their anti-photoaging activities and mechanism. The results consolidated that compounds 7, 11, and 14 could improve the survival rate of HaCaT cells in concentration dependent manner at 10, 25, and 50 μM. Furthermore, western blot assay suggested that all of them could inhibit the expression of matrix metalloproteinase-1 (MMP-1), and increase the level of type I collagen markedly. Compounds 11 and 14 could reduce the phosphorylation of extracellular signal-regulated kinase and p38, respectively. Besides, compounds 7, 11, and 14 could significantly down-regulate the expression of inflammation related protein, such as tumor necrosis factor-α and cyclooxygenase-2, which indicated that they played anti-photoaging activities by reducing MMP-1 expression via down-regulating the production of inflammatory mediators and cytokines in UVB-induced HaCaT cells.



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