Abstract:
:Experiments were conducted to determine the extent and variability of collagen degradation in human fetal lung fibroblasts. Cells were incubated with [14C]proline, and degradation was measured by determining the hydroxy[14C]proline in a low molecular weight fraction relative to total hydroxy[14C]proline. Average (basal) degradation in stationary phase HFL-1 cells incubated for 8 h was 16 +/- 3%, and substantial alterations in the composition of the labeling medium, e.g., omitting serum and varying pH between 6.8 and 7.8, had no effect. Organic buffers slightly lowered degradation in a manner that was independent of pH. Collagen degradation in two other lung cell lines, Wl-38 and lMR-90, did not differ from the level in HFL-1. Degradation was significantly higher (23 +/- 5%) in HFL-1 cultures labeled for 24 h rather than 8 h, and pulse-washout experiments showed that the rate of degradation was not uniform: after an 8-h pulse, 11% of the hydroxy [14C]proline in the medium was in the low molecular weight fraction, but 31% was in this fraction after a 16-h washout. The lack of effect of either serum deprivation or elevated pH suggests that lysosomal proteases have no direct role in basal degradation; however, NH4Cl decreased the enhanced degradation observed in ascorbate deficiency to basal level, indicating that abnormal molecules synthesized under those conditions are degraded by lysosomal proteases. The appearance of small hydroxy[14C]proline-containing molecules was inhibited by alpha alpha'dipyridyl and cycloheximide in a dose-dependent and reversible manner, demonstrating that their production depends on enzymatic hydroxylation of proline and protein synthesis.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Bienkowski RSdoi
10.1002/jcp.1041210119subject
Has Abstractpub_date
1984-10-01 00:00:00pages
152-8issue
1eissn
0021-9541issn
1097-4652journal_volume
121pub_type
杂志文章abstract::Transforming growth factor beta type 1 (TGF-beta 1) was reacted with NHS-biotin to yield a derivative of TGF-beta 1 which was biotinylated on lysine residues. The biotinylated form of TGF-beta 1 was separated from the unreacted material by reverse phase chromatography. In three separate bioassays, the derivatized pept...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041410125
更新日期:1989-10-01 00:00:00
abstract::The effect of cell culture age and concomitant changes in cell density on the biosynthesis of sulfated-proteoglycan by rabbit articular chondrocytes in secondary monolayer culture was studied. Low density (LD, 2 d), middle density (MD, 5-7 d), and high density (HD, 12-15 d) cultures demonstrated changes in cellular mo...
journal_title:Journal of cellular physiology
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doi:10.1002/jcp.1041210315
更新日期:1984-12-01 00:00:00
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journal_title:Journal of cellular physiology
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abstract::LL-37, the only known human cathelicidin which is encoded by the human antimicrobial peptide (CAMP) gene, plays a critical role in protection against bacterial infection. We previously demonstrated that cathelicidin is induced by 1,25-dihydroxyvitamin D3 (1,25(OH) 2 D 3 ) in human airway epithelial cells with a result...
journal_title:Journal of cellular physiology
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更新日期:2019-07-01 00:00:00
abstract::Fetal brown adipocytes expressed uncoupling protein 1 (UCP1) mRNA, this expression being blunted throughout culture for 24 h in a serum-free medium. At physiological doses, either insulin-like growth factor I (IGF-I) or insulin turned out to be as potent as dibutyryl cAMP (dbcAMP) in increasing UCP1 gene transcription...
journal_title:Journal of cellular physiology
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更新日期:1998-07-01 00:00:00
abstract::The advent of high throughput gene expression profiling, from microarrays to sequence based assays has yielded vast insight into the biology of tumors. New technologies are constantly being unveiled which promise to generate more accurate maps of tumor gene deregulation, and demand the development of new strategies in...
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更新日期:2008-12-01 00:00:00
abstract::We have shown in the present study and in studies reported previously that preneoplastic and neoplastic rat tracheal epithelial (RTE) cell lines express TGF alpha and do so regardless of the mechanism by which they were transformed. In order to determine whether TGF alpha is an autocrine growth regulator of immortaliz...
journal_title:Journal of cellular physiology
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更新日期:1991-04-01 00:00:00
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journal_title:Journal of cellular physiology
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更新日期:2019-08-01 00:00:00
abstract::Intramedullary stabilization is frequently used to treat long bone fractures. Since implant removal can become technically very challenging with the potential to cause further tissue damage, biodegradable materials are emerging as alternative options. Magnesium (Mg)-based biodegradable implants have a controllable deg...
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abstract::Laminin is a basement membrane-specific glycoprotein that promotes cell adhesion, proliferation, differentiation, and tumor cell migration. Synthetic peptides from the amino acid sequence deduced from a cDNA clone of the B1 chain of laminin were tested for their ability to promote the migration of B16F10 melanoma cell...
journal_title:Journal of cellular physiology
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更新日期:1988-02-01 00:00:00
abstract::At the end of December 2019, a novel acute respiratory syndrome coronavirus 2 (SARS-CoV2) appeared as the third unheard of outbreak of human coronavirus infection in the 21st century. First, in Wuhan, China, the novel SARS-CoV2 was named by the World Health Organization (WHO), as 2019-nCOV (COVID-19), and spread extre...
journal_title:Journal of cellular physiology
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journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041610118
更新日期:1994-10-01 00:00:00
abstract::Bone morphogenetic protein-2 (BMP-2), a member of transforming growth factor-beta superfamily, plays a crucial role in migration and metastasis of human cancer cells. Integrins are the major adhesive molecules in mammalian cells. Here we found that BMP-2 directed the migration and increased cell surface and mRNA expre...
journal_title:Journal of cellular physiology
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更新日期:2008-12-01 00:00:00
abstract::The S100 protein family comprises more than 20 members of small calcium binding proteins operating as Ca2 +-activated switches that interact and modulate the activity of a large number of targets. S100A1 and S100B, two members of this family, have been recently associated with the differentiation status of human artic...
journal_title:Journal of cellular physiology
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更新日期:2017-08-01 00:00:00
abstract::Although the type 1 insulin-like growth factor receptor (IGF-IR) is a potent inhibitor of apoptosis, its C-terminus sequence sends contradictory signals, including a clearly proapoptotic signal. We have synthesized a peptide, peptide 2, having the sequence of the IGF-IR from residue 1282 to residue 1298 (C-terminus of...
journal_title:Journal of cellular physiology
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abstract::Subcellular localization of the large multicatalytic protease complexes called proteasomes, which have been found in soluble fractions of various cells, was examined by biochemical, immunological, and immunohistological methods. Rat liver nuclei, purified by two different procedures, showed high activities for degradi...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041390107
更新日期:1989-04-01 00:00:00
abstract::We evaluated the role of CCL20 (MIP-3alpha) chemokine in cells directly involved in the remodeling of bone tissue (osteoblasts and osteoclasts) and we confirmed its expression in the subchondral bone tissue of rheumatoid arthritis (RA) patients. The expression of CCL20 and of its receptor CCR6 was evaluated in osteobl...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
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更新日期:2007-03-01 00:00:00
abstract::Human peripheral blood monocytes and neutrophils secrete TGF-beta. Activation of monocytes with LPS stimulates the secretion of TGF-beta; however, the production of TGF-beta by neutrophils was not altered by treatment with LPS. The secreted TGF-beta appears to be in a fully active form since acid treatment of the cond...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041400226
更新日期:1989-08-01 00:00:00
abstract::Cellular senescence is a growth-arrest program that limits cell proliferation. Low-power laser irradiation (LPLI) has been demonstrated to promote cell proliferation. However, whether LPLI can inhibit cellular senescence remains unknown. In the present study, to investigate the functional role of LPLI against skin agi...
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更新日期:2014-01-01 00:00:00
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abstract::The epidermal growth factor (EGF) receptor interacts with structural elements of A431 cells and remains associated with the cytoskeleton following extraction with nonionic detergents. Extraction of cells with 0.15% Triton X-100 resulted in detection of only approximately 40% of the EGF binding sites on the cytoskeleto...
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journal_title:Journal of cellular physiology
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更新日期:1981-10-01 00:00:00
abstract::Regulation of proliferation and differentiation in keratinocyte is a complex and dynamic process that involves activation of multiple signaling pathways triggered by different growth factors. Keratinocyte growth factor (KGF) is not only a potent mitogen, but differently from other growth factors, is a potent inducer o...
journal_title:Journal of cellular physiology
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更新日期:2007-09-01 00:00:00
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journal_title:Journal of cellular physiology
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更新日期:2018-09-01 00:00:00
abstract::Invasion of tumor cells is the primary cause of therapeutic failure in the treatment of malignant chondrosarcomas. Glial cell-derived neurotrophic factor (GDNF) plays a crucial role in migration and metastasis of human cancer cells. Integrins are the major adhesive molecules in mammalian cells. Here we found that GDNF...
journal_title:Journal of cellular physiology
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更新日期:2009-08-01 00:00:00
abstract::Autocrine activation of the epidermal growth factor (EGF) receptor on keratinocytes has been recognized as an important growth regulatory mechanism involved in epithelial homeostasis, and, possibly, hyperproliferative diseases. Insulin-like growth factor (IGF)-1 and insulin have been shown to be paracrine keratinocyte...
journal_title:Journal of cellular physiology
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更新日期:1995-05-01 00:00:00
abstract::Numerous reports have appeared on the occurrence of undefined protein factors in male reproductive fluids that promote motility of mature sperm and initiate forward motility in the immature (immotile) caput-epididymal sperm. This study reports for the first time purification to apparent homogeneity of a motility initi...
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更新日期:2010-01-01 00:00:00
abstract::Fas, which functions to initiate a signal causing apoptosis, is expressed in epithelia, thus, suggesting a role in controlling cell number during states of cell and matrix turnover. In view of this, we hypothesized that cell-matrix interactions may be an important determinant of Fas expression in epithelial cells. To ...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4652(199803)174:3<285::AID-JCP2
更新日期:1998-03-01 00:00:00
abstract::Progesterone is an endogenous immunomodulator and can suppress T-cell activation during pregnancy. We have previously shown that the non-genomic effects of progesterone, especially acidification, are exerted via plasma membrane sites and suppress cellular genomic responses to mitogens. This study aimed to show that ac...
journal_title:Journal of cellular physiology
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更新日期:2007-05-01 00:00:00