Phosphatidylcholine-specific phospholipase C, but not phospholipase D, is involved in pemphigus IgG-induced signal transduction

Mariko Seishima, Yoshihiko Iwasaki-Bessho, Yuzuru Itoh, Yoshinori Nozawa, Masayuki Amagai, Yasuo Kitajima

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The precise mechanism of the acantholysis after pemphigus IgGs bind to desmoglein (Dsg) 3 and/or Dsg 1 on the cell surface is as yet unknown. We have previously reported that pemphigus IgG (P-IgG) causes a transient increase in intracellular calcium and inositol 1,4,5-trisphosphate concentration, and subsequent activation of protein kinase C (PKC) in DJM-1 cells, a squamous cell carcinoma line. In order to see whether phosphatidylcholine (PC)-specific phospholipase C (PLC) or phospholipase D (PLD) is involved in the P-IgG-induced signaling process, the production of 1,2-diacylglycerol (DAG) and phosphatidylbutanol (PBut), a potential marker for the determination of PLD activity in the presence of butanol, was determined in DJM-1 cells. A biphasic accumulation of DAG, which consisted of a first transient phase and a second sustained phase, was observed. The second phase of DAG accumulation was profoundly inhibited by pretreatment with D609, a selective inhibitor of PC-PLC, but not by propranolol, an inhibitor of phosphatidate phosphohydrolase. Pemphigus serum after preadsortion of antibodies to Dsg 3 and Dsg 1 with recombinant Dsg 3 and Dsg 1 did not show formation of DAG. PBut was not generated following the addition of P-IgG. In addition, the levels of [3H]phosphocholine, a direct metabolite of PC-PLC, were elevated after the addition of P-IgG. These results suggest that the PC-PLC pathway plays a major role in P-IgG-induced transmembrane signaling by causing prolonged generation of DAG, which may lead to long-term activation of PKC.

Original languageEnglish
Pages (from-to)606-613
Number of pages8
JournalArchives of Dermatological Research
Volume291
Issue number11
DOIs
Publication statusPublished - 1999

Fingerprint

Phospholipase D
Pemphigus
Desmoglein 3
Desmoglein 1
Signal Transduction
Immunoglobulin G
Type C Phospholipases
Phosphatidylcholines
Protein Kinase C
Phosphatidate Phosphatase
Acantholysis
Butanols
Inositol 1,4,5-Trisphosphate
Phosphorylcholine
Propranolol
Squamous Cell Carcinoma
1,2-diacylglycerol
phosphatidylcholine-specific phospholipase C
Calcium
Cell Line

Keywords

  • Bullous disease
  • Diacylglycerol
  • Keratinocyte

ASJC Scopus subject areas

  • Dermatology

Cite this

Phosphatidylcholine-specific phospholipase C, but not phospholipase D, is involved in pemphigus IgG-induced signal transduction. / Seishima, Mariko; Iwasaki-Bessho, Yoshihiko; Itoh, Yuzuru; Nozawa, Yoshinori; Amagai, Masayuki; Kitajima, Yasuo.

In: Archives of Dermatological Research, Vol. 291, No. 11, 1999, p. 606-613.

Research output: Contribution to journalArticle

Seishima, Mariko ; Iwasaki-Bessho, Yoshihiko ; Itoh, Yuzuru ; Nozawa, Yoshinori ; Amagai, Masayuki ; Kitajima, Yasuo. / Phosphatidylcholine-specific phospholipase C, but not phospholipase D, is involved in pemphigus IgG-induced signal transduction. In: Archives of Dermatological Research. 1999 ; Vol. 291, No. 11. pp. 606-613.
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AU - Itoh, Yuzuru

AU - Nozawa, Yoshinori

AU - Amagai, Masayuki

AU - Kitajima, Yasuo

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AB - The precise mechanism of the acantholysis after pemphigus IgGs bind to desmoglein (Dsg) 3 and/or Dsg 1 on the cell surface is as yet unknown. We have previously reported that pemphigus IgG (P-IgG) causes a transient increase in intracellular calcium and inositol 1,4,5-trisphosphate concentration, and subsequent activation of protein kinase C (PKC) in DJM-1 cells, a squamous cell carcinoma line. In order to see whether phosphatidylcholine (PC)-specific phospholipase C (PLC) or phospholipase D (PLD) is involved in the P-IgG-induced signaling process, the production of 1,2-diacylglycerol (DAG) and phosphatidylbutanol (PBut), a potential marker for the determination of PLD activity in the presence of butanol, was determined in DJM-1 cells. A biphasic accumulation of DAG, which consisted of a first transient phase and a second sustained phase, was observed. The second phase of DAG accumulation was profoundly inhibited by pretreatment with D609, a selective inhibitor of PC-PLC, but not by propranolol, an inhibitor of phosphatidate phosphohydrolase. Pemphigus serum after preadsortion of antibodies to Dsg 3 and Dsg 1 with recombinant Dsg 3 and Dsg 1 did not show formation of DAG. PBut was not generated following the addition of P-IgG. In addition, the levels of [3H]phosphocholine, a direct metabolite of PC-PLC, were elevated after the addition of P-IgG. These results suggest that the PC-PLC pathway plays a major role in P-IgG-induced transmembrane signaling by causing prolonged generation of DAG, which may lead to long-term activation of PKC.

KW - Bullous disease

KW - Diacylglycerol

KW - Keratinocyte

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