Expression of protein kinase C (PKC) alpha, delta, epsilon, zeta in primary chick chondrocyte cultures: immunocytochemical study.
PKC is a family of 12 serine/threonine isoenzymes that plays a pivotal role in signal transduction in a large number of biological processes. In the present work we have investigated the expression of PKC (alpha, delta, epsilon, zeta) in chick chondrocyte primary cultures at different differentiation times, i.e. at 48, 55, 62 and 69 days after cell collection from tibiae of 6-day old chick embryos. We would also detect cell differentiation stages towards the osteoblast-like cell phenotype by observing the immunocytochemical expression of the specific osteoblast marker, type I collagen. At the considered culture times, cells exhibited immunocytochemical positivity for type I collagen, thus showing their differentiation towards the osteoblast-like phenotype. PKC-zeta was the isoenzyme that exhibited the most relevant immunocytochemical expression in all considered culture times, whereas PKC-epsilon always less expressed in comparison to the other PKC-isoforms. No relevant differences were observed for the immunocytochemical expressions of PKC-alpha and PKC-delta. On the basis of the immunocytochemical data obtained from the present investigation, we could affirm that PKC-alpha, -delta, -epsilon, and -zeta may play peculiar roles in the differentiation process of chick chondrocytes towards the osteoblast-like cell phenotype.
Nicolin
Vanessa
V
Department of Human Morphology, University of Trieste, Trieste, Italy.
Sandrucci
Maria A
MA
Basa
Marisa
M
Bareggi
Renato
R
Martelli
Alberto M
AM
Narducci
Paola
P
Grill
Vittorio
V
D000818:Animals; D015415:Biomarkers; D001842:Bone and Bones / Q000196:embryology / Q000201:enzymology; D002356:Cartilage / Q000166:cytology / Q000196:embryology* / Q000201:enzymology*; D002454:Cell Differentiation / Q000502:physiology*; D002478:Cells, Cultured; D002642:Chick Embryo; D019902:Chondrocytes / Q000166:cytology / Q000201:enzymology*; D024042:Collagen Type I / Q000378:metabolism; D007150:Immunohistochemistry; D007527:Isoenzymes / Q000378:metabolism; D010006:Osteoblasts / Q000166:cytology / Q000378:metabolism; D010012:Osteogenesis / Q000502:physiology; D011493:Protein Kinase C / Q000378:metabolism*; D051571:Protein Kinase C-alpha; D051745:Protein Kinase C-delta; D051744:Protein Kinase C-epsilon; D000099221:Protein Kinase C zeta
D015415:Biomarkers; D024042:Collagen Type I; D007527:Isoenzymes; D011493:Protein Kinase C; D051571:Protein Kinase C-alpha; D051745:Protein Kinase C-delta; D051744:Protein Kinase C-epsilon; D000099221:Protein Kinase C zeta