The types of cell-matrix adhesions and the signals they transduce strongly affect the cell-phenotype. We hypothesized that cells sense and respond to the three-dimensionality of their environment, which could be modulated by nano-structures on silicon surfaces. Human foreskin fibroblasts were cultured on nano-structures with different patterns (nano-post and nano-grate) and heights for 3 days. The presence of integrin alpha(5), beta(1), beta(3), paxillin and phosphorylated FAK (pFAK) were detected by western blot and immunofluorescence. Integrin beta(3) exhibited stronger signals on nano-grates. pFAK and paxillin were observed as small dot-like patterns on the cell-periphery on nano-posts and as elongated and aligned patterns on nano-grates. Collectively, our observations highlighted the presence of focal (integrin beta(1), beta(3), pFAK, paxillin), fibrillar (integrin alpha(5), beta(1)) and 3-D matrix (integrin alpha(5), beta(1), paxillin) adhesions on nano-structures. The presented nano-structures offer interesting opportunities to study the interaction of cells with topographical features comparable to the size of extracellular matrix components.
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http://dx.doi.org/10.1080/15419060701755594 | DOI Listing |
Fish Shellfish Immunol
December 2024
Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, 515063, China. Electronic address:
DNA viruses commonly utilize immediate-early proteins to manipulate cellular signaling pathways in order to facilitate their infection. Our previous research has suggested that IE1, an immediate-early protein encoded by the white spot syndrome virus (WSSV), may modulate the shrimp integrin-FAK signaling pathway. However, the specific molecular mechanism and role of IE1 in regulating this signaling pathway remain unclear.
View Article and Find Full Text PDFPLoS One
December 2024
Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, United States of America.
Ovarian cancer is the leading cause of death among gynecologic malignancies. Despite recent advancements in targeted therapies such as PARP inhibitors, recurrence is common and frequently resistant to existing therapies. A powerful diagnostic tool, coupled with a comprehensive understanding of its implications, is crucial.
View Article and Find Full Text PDFAm J Physiol Cell Physiol
January 2025
Laboratory of Clinical Science and Biomedicine, Graduate School of Pharmaceutical Sciences, Osaka University, Suita City, Japan.
As cardiomyocyte loss causes heart failure, inhibition of cardiomyocyte death may be a therapeutic strategy against heart failure. In this study, we have identified defender against cell death 1 (Dad1) as a candidate regulator of cardiomyocyte death, using complementary DNA microarray and siRNA knockdown screening. Dad1 is a subunit of oligosaccharyltransferase (OST) complex that is responsible for protein N-glycosylation; however, its function in cardiomyocytes remains unknown.
View Article and Find Full Text PDFFront Bioeng Biotechnol
November 2024
Department of Engineering and Geology, University "G. d'Annunzio" Chieti-Pescara, Pescara, Italy.
Introduction: In recent years, advancements in technology and the refinement of engineering techniques have facilitated the development of tissue engineering, placing particular emphasis on the use of 3D-biomaterials with several structural and chemical geometric features. In particular, increasing information on biomaterial geometric surfaces has allowed for a better understanding of tissue regenerative processes. In the present study a comparison between BioRipar, bovine pericardium membrane, modified with micrometric roundish regular open pores (BioR-Ps) and BioRipar without pores (BioR-NPs) has been investigated.
View Article and Find Full Text PDFCancer Sci
November 2024
Department of Respiratory Medicine, The University of Tokyo, Tokyo, Japan.
Integrins are transmembrane receptors that facilitate cell adhesion to the extracellular matrix and neighboring cells. Aberrant expression of integrins has been associated with tumor progression and metastasis in various cancer types. Integrin alpha-5 (ITGA5) is an integrin subtype that serves as a receptor for fibronectin, fibrinogen, and fibrillin-1.
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