Home
Resources
Publications
The Protein Kinase C Inhibitor 1-(5-isoquinolinesulfonyl)-2-methylpiperazine Dihydrochloride (H-7) Inhibits PMA-induced Promiscuous Cytolytic Activity but Not Specific Cytolytic Activity by a Cloned Cytolytic T Lymphocyte

The Protein Kinase C Inhibitor 1-(5-isoquinolinesulfonyl)-2-methylpiperazine Dihydrochloride (H-7) Inhibits PMA-induced Promiscuous Cytolytic Activity but Not Specific Cytolytic Activity by a Cloned Cytolytic T Lymphocyte

T K Howcroft, R R Lindquist

Biochem Biophys Res Commun. 1991 Sep 16;179(2):720-5.

PMID: 1898396

Abstract:

Phorbol 12-myristate 13-acetate (PMA) induces the cytolytic T lymphocyte (CTL) clone 4D (H-2b anti-H-2d) to promiscuously kill the inappropriate target EL-4 (H-2b). The protein kinase C (PKC) inhibitor 1-(5-isoquinolinesulfonyl)-2-methylpiperazine dihydrochloride (H-7) inhibited the PMA-induced promiscuous lympholysis. The concentration of H-7 that inhibited PMA-induced lympholysis by 50% (IC50) was calculated to be 4 microM, which closely approximates the reported IC50 of H-7 of 6 microM for PKC activity in vitro. In striking contrast, specific cytolysis of appropriate P815 (H-2d) target cell by CTL clone 4D was not inhibited by concentrations of H-7 which inhibited PMA-induced promiscuous lympholysis. These results indicate that PMA-induced promiscuous lympholysis of inappropriate target cell is triggered via activation of PKC, whereas PKC activation is not obligatory in triggering CTL clone 4D to specifically kill appropriate target cells. Thus, these data suggest that cloned CTL have two or more triggering mechanisms than may initiate one or more cytolytic pathways.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP108930172-A	H-7 dihydrochloride		108930-17-2	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: