Zfat, which is a nuclear protein harboring an AT-hook domain and 18-repeats of C2H2 zinc-finger motif, is highly expressed in immune-related tissues, including the thymus and spleen. T cell specific deletion of the Zfat gene by crossing Zfat(f/f) mice with LckCre mice yields a significant reduction in the number of CD4(+) CD8(+) double-positive (DP) thymocytes. However, physiological role for Zfat in T cell development in the thymus remains unknown. Here, we found that Zfat-deficient DP thymocytes in Zfat(f/f)-LckCre mice were susceptible to apoptosis both at an unstimulated state and in response to T cell receptor (TCR)-stimulation. The phosphorylation levels of p38 and JNK were elevated in Zfat-deficient thymocytes at an unstimulated state with an enhanced phosphorylation of ATF2 and with an over-expression of Gadd45α⋅ On the other hand, the activation of JNK in the Zfat-deficient thymocytes, but not p38, was strengthened and prolonged in response to TCR-stimulation. All these results demonstrate that Zfat critically participates in the development of DP thymocytes through regulating the activities of p38 and JNK.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/jcb.24954 | DOI Listing |
Unlabelled: SARS coronavirus 2 (SARS-CoV-2) non-structural protein 14 (Nsp14) possesses an N-terminal exonuclease (ExoN) domain that provides a proofreading function for the viral RNA-dependent RNA polymerase and a C-terminal N7-methyltransferase (N7-MTase) domain that methylates viral mRNA caps. Nsp14 also modulates host functions. This includes the activation of NF-κB and downregulation of interferon alpha/beta receptor 1 (IFNAR1).
View Article and Find Full Text PDFJ Biol Chem
December 2024
Department of Biological Sciences, University of Memphis, Memphis, TN 38152, USA. Electronic address:
Mitogen-activated protein kinase kinase kinase 4 (MAP3K4) promotes fetal and placental growth and development, with MAP3K4 kinase inactivation resulting in placental insufficiency and fetal growth restriction. MAP3K4 promotes key signaling pathways including JNK, p38, and PI3K/Akt, leading to activation of CREB-binding protein. MAP3K4 kinase inactivation results in loss of these pathways and gain of histone deacetylase 6 (HDAC6) expression and activity.
View Article and Find Full Text PDFCell Biochem Biophys
December 2024
Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8504, Japan.
Apical periodontitis is an inflammatory disease caused by bacterial infection in the root canal that spreads to the apical periodontal tissues, resulting in bone resorption around the root apex as the disease progresses. Vascular endothelial growth factor (VEGF), a growth factor involved in angiogenesis, plays an important role in bone remodeling. We reported that caffeic acid phenethyl ester (CAPE), a bioactive substance of propolis, induces VEGF in odontoblast-like cells and dental pulp cells.
View Article and Find Full Text PDFJ Fish Biol
December 2024
College of Animal Science and Technology, Jilin Agriculture University, Changchun, China.
The study investigated the potential alleviating effect of sodium butyrate (SB) on intestinal injuries caused by glycinin in the diet of common carp. Fish were divided into six groups: a control group (without glycinin and SB), a Gly group (with glycinin), and four groups supplemented with different doses of SB (0.75, 1.
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
November 2024
School of Life Sciences, Beijing University of Chinese Medicine Beijing 100029, China.
Based on the differences in the protective effects of fresh Panax ginseng and its processed products on myocardial ischemia in mice, this study identified the advantageous aspects of fresh P. ginseng. By using network pharmacology combined with cell model validation, the molecular mechanisms of fresh P.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!