CCL

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001-es BibID:BIBFORM001047
Első szerző:Griger Zoltán (belgyógyász, allergológus és klinikai immunológus, reumatológus)
Cím:Protein kinase C-beta and -delta isoenzymes promote arachidonic acid production and proliferation of MonoMac-6 cells / Griger Z., Páyer E., Kovács I., Tóth I. B., Kovács L., Sipka S., Bíró T.
Dátum:2007
ISSN:0946-2716 (Print)
Megjegyzések:In this study, we investigated the putative roles of certain protein kinase C (PKC) isoenzymes in the regulation of proliferation and arachidonic acid (AA) release in the human monocytoid MonoMac-6 cell line. Experiments employing specific PKC inhibitors and molecular biological methods (RNA-interference, recombinant overexpression) revealed that the two dominantly expressed isozymes, i.e., the "conventional" cPKCbeta and the "novel" nPKCdelta, promote AA production and cellular proliferation. In addition, using different phospholipase A(2) (PLA(2)) inhibitors, we were able to show that the calcium-independent iPLA(2) as well as diacylglycerol lipase (but not the cytosolic PLA(2)) function as "downstream" targets of cPKCbeta and nPKCdelta. In addition, we have also found that, among the other existing PKC isoforms, cPKCalpha plays a minor inhibitory role, whereas nPKCvarepsilon and aPKCzeta apparently do not regulate these cellular processes. In conclusion, in this paper we provide the first evidence that certain PKC isoforms play pivotal, specific, and (at least partly) antagonistic roles in the regulation of AA production and cellular proliferation of human monocytoid MonoMac-6 cells.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal of Molecular Medicine 85 : 9 (2007), p. 1031-1042. -
További szerzők:Páyer Edit (1982-) Kovács Ildikó Tóth István Balázs (1978-) (élettanász) Kovács László (1939-) (élettanász) Sipka Sándor (1945-) (laboratóriumi szakorvos) Bíró Tamás (1968-) (élettanász)
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2.

001-es BibID:BIBFORM009116
Első szerző:Szegedi Andrea (bőrgyógyász)
Cím:Protein kinase C isoenzymes differentially regulate the differentiation-dependent expression of adhesion molecules in human epidermal keratinocytes / Szegedi, A., Payer, E., Czifra, G., Toth, B. I., Schmidt, E., Kovacs, L., Blumberg, P. M., Biro, T.
Dátum:2009
ISSN:0906-6705 (Print)
Megjegyzések:Epidermal expression of adhesion molecules such as desmogleins (Dsg) and cadherins is strongly affected by the differentiation status of keratinocytes. We have previously shown that certain protein kinase C (PKC) isoforms differentially alter the growth and differentiation of human epidermal HaCaT keratinocytes. In this paper, using recombinant overexpression and RNA interference, we define the specific roles of the different PKC isoenzymes in modulation of expression of adhesion molecules in HaCaT keratinocytes. The level of Dsg1, a marker of differentiating keratinocytes, was antagonistically regulated by two Ca-independent 'novel' nPKC isoforms; i.e. it increased by the differentiation-promoting nPKCdelta and decreased by the growth-promoting nPKCepsilon. The expression of Dsg3 (highly expressed in proliferating epidermal layers) was conversely regulated by these isoenzymes, and was also inhibited by the differentiation inducer Ca-dependent 'conventional' cPKCalpha. Finally, the expression of P-cadherin (a marker of proliferating keratinocytes) was regulated by all of the examined PKCs, also in an antagonistic manner (inhibited by cPKCalpha/nPKCdelta and stimulated by cPKCbeta/nPKCepsilon). Collectively, the presented results strongly argue for the marked, differential, and in some instances antagonistic roles of individual Ca-dependent and Ca-independent PKC isoforms in the regulation of expression of adhesion molecules of desmosomes and adherent junctions in human epidermal keratinocytes.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Biological Markers
Cadherins
Cell Differentiation
Cell Line
Cell Proliferation
Cells, Cultured
Desmoglein 1
Desmoglein 3
Epidermis
Humans
Isoenzymes
Keratinocytes
Protein Kinase C
Protein Kinase C-alpha
Protein Kinase C-delta
Protein Kinase C-epsilon
Signal Transduction
Megjelenés:Experimental Dermatology. - 18 : 2 (2009), p. 122-129. -
További szerzők:Páyer Edit (1982-) Czifra Gabriella (1975-) (élettanász) Tóth István Balázs (1978-) (élettanász) Schmidt Emese Kovács László (1939-) (élettanász) Blumberg, Peter M. Bíró Tamás (1968-) (élettanász)
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