Browsing by Subject "fibroblast"

Article

The A and B fragments of normal type I procollagen have a similar thermal stability to proteinase digestion but are selectively destabilized by structural mutations

Constantinou-Deltas, Constantinos D.; VOGEL, B. E.; JEFFREY, J. J.; PROCKOP, D. J. (1987)

Previous studies demonstrated that the thermal stability of the procollagen triple helix can be assayed by digesting the protein for short periods with high concentrations of trypsin and chymotrypsin. Here we cleaved human ...

Article

Causes, consequences, and remedies for growth-induced solid stress in murine and human tumors

Stylianopoulos, T.; Martin, J. D.; Chauhan, V. P.; Jain, S. R.; Diop-Frimpong, B.; Bardeesy, N.; Smith, B. L.; Ferrone, C. R.; Hornicek, F. J.; Boucher, Y.; Munn, L. L.; Jain, R. K. (2012)

The presence of growth-induced solid stresses in tumors has been suspected for some time, but these stresses were largely estimated using mathematical models. Solid stresses can deform the surrounding tissues and compress ...

Article

Defining the role of solid stress and matrix stiffness in cancer cell proliferation and metastasis

Kalli, M.; Stylianopoulos, T. (2018)

Solid tumors are characterized by an abnormal stroma that contributes to the development of biomechanical abnormalities in the tumor microenvironment. In particular, these abnormalities include an increase in matrix stiffness ...

Article

Depletion of histone N-terminal-acetyltransferase Naa40 induces p53-independent apoptosis in colorectal cancer cells via the mitochondrial pathway

Pavlou, Demos; Kirmizis, Antonis (2016)

Protein N-terminal acetylation is an abundant post-translational modification in eukaryotes implicated in various fundamental cellular and biochemical processes. This modification is catalysed by evolutionarily conserved ...

Article

Direct conversion of mouse embryonic fibroblasts into functional keratinocytes through transient expression of pluripotency-related genes

Iacovides, D.; Rizki, G.; Lapathitis, Georgios; Strati, Katerina (2016)

The insufficient ability of specialized cells such as neurons, cardiac myocytes, and epidermal cells to regenerate after tissue damage poses a great challenge to treat devastating injuries and ailments. Recent studies ...

Article

Evidence that a metabolilte of equine estrogens, 4-hydroxyequilenin, induces cellular transformation in vitro

Pisha, E.; Lui, X.; Constantinou, Andreas I.; Bolton, J. L. (2001)

Estrogen replacement therapy has been correlated with an increased risk of developing hormone-dependent cancers. 4-Hydroxyequilenin (4-OHEN) is a catechol metabolite of equilenin and equilin which are components of the ...

Article

FAK transduces extracellular forces that orient the mitotic spindle and control tissue morphogenesis

Petridou, Nicoletta I.; Skourides, Paris A. (2014)

Spindle orientation is critical for proper morphogenesis of organs and tissues as well as for the maintenance of tissue morphology. Although significant progress has been made in understanding the mechanisms linking the ...

Article

The Ink4/Arf locus is a barrier for iPS cell reprogramming

Li, H.; Collado, M.; Villasante, A.; Strati, Katerina; Ortega, S.; Cãamero, M.; Blasco, M. A.; Serrano, M. (2009)

The mechanisms involved in the reprogramming of differentiated cells into induced pluripotent stem (iPS) cells by the three transcription factors Oct4 (also known as Pou5f1), Klf4 and Sox2 remain poorly understood. The ...

Article

KIF2β, a new kinesin superfamily protein in non-neuronal cells, is associated with lysosomes and may be implicated in their centrifugal translocation

Santama, Niovi; Krijnse-Ĺocker, J.; Griffiths, G.; Noda, Y.; Hirokawa, N.; Dotti, C. G. (1998)

Lysosomes concentrate juxtanuclearly in the region around the microtubule-organizing center by interaction with microtubules. Different experimental and physiological conditions can induce these organelles to move to the ...

Article

Role of TGFβ in regulation of the tumor microenvironment and drug delivery (review)

Papageorgis, P.; Stylianopoulos, T. (2015)

Deregulation of cell signaling homeostasis is a predominant feature of cancer initiation and progression. Transforming growth factor β (TGFβ) is a pleiotropic cytokine, which regulates numerous biological processes of ...

Article

A single base mutation that converts glycine 907 of the α2(I) chain of type I procollagen to aspartate in a lethal variant of osteogenesis imperfecta. The single amino acid substitution near the carboxyl terminus destabilizes the whole triple helix

Baldwin, C. T.; Constantinou-Deltas, Constantinos D.; Dumars, K. W.; Prockop, D. J. (1989)

Type I procollagen was examined in cultured skin fibroblasts from a patient with a lethal variant of osteogenesis imperfecta. About half of the pro-α chains were post-translationally overmodified and had a decreased thermal ...

Article

Sonic-hedgehog pathway inhibition normalizes desmoplastic tumor microenvironment to improve chemo- and nanotherapy

Mpekris, F.; Papageorgis, P.; Polydorou, C.; Voutouri, C.; Kalli, M.; Pirentis, A. P.; Stylianopoulos, T. (2017)

Targeting the rich extracellular matrix of desmoplastic tumors has been successfully shown to normalize collagen and hyaluronan levels and re-engineer intratumoral mechanical forces, improving tumor perfusion and chemotherapy. ...

Article

Substitutions for glycine α1-637 and glycine α2-694 of type I procollagen in lethal osteogenesis imperfecta: The conformational strain on the triple helix introduced by a glycine substitution can be transmitted along the helix

Tsuneyoshi, T.; Westerhausen, A.; Constantinou-Deltas, Constantinos D.; Prockop, D. J. (1991)

Two substitutions for glycine in the triple-helical domain were found in type I procollagen synthesized by skin fibroblasts from two probands with lethal osteogenesis imperfecta. One was a substitution of valine for glycine ...