Protein kinase C-associated kinase is not required for the development of peripheral B lymphocyte populations.

Abstract:

:Protein kinase C-associated kinase (PKK; DIK/RIP4) is an ankyrin-repeat containing serine/threonine receptor-interacting protein (RIP)-family kinase that can activate NFkappaB, and is required for keratinocyte development. In earlier studies, the expression of a catalytically inactive mutant of PKK in the B cell lineage resulted in a marked decrease in peripheral B cells in the spleen and a severe reduction of B-1 B cells. Here we explore the consequences of a null mutation in PKK with respect to the generation of peripheral B cell lineages and the activation of NFkappaB. We show that PKK is not required for the production of B cells in the bone marrow or for the development and maintenance of all mature B lymphocyte populations. We also show that PKK is not required for the activation of NFkappaB downstream of the BCR, CD40, or TLR-4 in B cells. Taken together, these data demonstrate that the loss of this RIP-family kinase does not compromise B lymphocyte development and maintenance, but leaves open the possibility that PKK may have a redundant role in these processes.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Moran ST,Cariappa A,Liu H,Boboila C,Shi HN,Holland PM,Peschon JJ,Pillai S

doi

10.1016/j.molimm.2005.09.009

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

1694-9

issue

10

eissn

0161-5890

issn

1872-9142

pii

S0161-5890(05)00341-X

journal_volume

43

pub_type

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