Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/105701
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Type: Journal article
Title: The role of PKCζ in cord blood T-cell maturation towards Th1 cytokine profile and its epigenetic regulation by fish oil
Other Titles: The role of PKCzeta in cord blood T-cell maturation towards Th1 cytokine profile and its epigenetic regulation by fish oil
Author: Harb, H.
Irvine, J.
Amarasekera, M.
Hii, C.
Kesper, D.
Ma, Y.
D'Vaz, N.
Renz, H.
Potaczek, D.
Prescott, S.
Ferrante, A.
Citation: Bioscience Reports, 2017; 37(2):BSR20160485-1-BSR20160485-11
Publisher: Portland Press
Issue Date: 2017
ISSN: 0144-8463
1573-4935
Statement of
Responsibility: 
Hani Harb, James Irvine, Manori Amarasekera, Charles S. Hii, Dörthe A. Kesper, YueFang Ma, Nina D′Vaz, Harald Renz, Daniel P. Potaczek, Susan L. Prescott and Antonio Ferrante
Abstract: While immunodeficiency of immaturity of the neonate has been considered important as the basis for unusual susceptibility to infection, it has also been recognized that the ability to progress from an immature Th2 cytokine predominance to a Th1 profile has relevance in determining whether children will develop allergy, providing an opportunity for epigenetic regulation through environmental pressures. However, this notion remains relatively unexplored. Here, we present evidence that there are two major control points to explain the immunodeficiency in cord blood (CB) T-cells, a deficiency in interleukin (IL)-12 (IL-12) producing and IL-10 overproducing accessory cells, leading to a decreased interferon γ (IFNγ) synthesis and the other, an intrinsic defect in T-cell protein kinase C (PKC) ζ (PKCζ) expression. An important finding was that human CB T-cells rendered deficient in PKCζ, by shRNA knockdown, develop into low tumour necrosis factor α (TNFα) and IFNγ but increased IL-13 producing cells. Interestingly, we found that the increase in PKCζ levels in CB T-cells caused by prenatal supplementation with fish oil correlated with modifications of histone acetylation at the PKCζ gene (PRKCZ) promoter. The data demonstrate that PKCζ expression regulates the maturation of neonatal T-cells into specific functional phenotypes and that environmental influences may work via PKCζ to regulate these phenotypes and disease susceptibility.
Keywords: Accessory cells; cord blood T-cell maturation; epigenetics; fish oil; neonates; PKCζ
Rights: © 2017 The Author(s). This is an open access article published by Portland Press Limited on behalf of the Biochemical Society and distributed under the Creative Commons Attribution Licence 4.0 (CC BY).
RMID: 0030068190
DOI: 10.1042/BSR20160485
Grant ID: http://purl.org/au-research/grants/nhmrc/353555
http://purl.org/au-research/grants/nhmrc/513709
Appears in Collections:Biochemistry publications

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