alexa [Dynamic expression of PD-1 in HBV-specific cytotoxic T lymphocytes correlates with memory T-cell development in acute hepatitis B patients].
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Gu LL, Xu B, Zhang JY, Zhang Z, Wang FS

Abstract Share this page

Abstract OBJECTIVES: Programmed death-1 (PD-1) up-regulation impairs virus-specific CD8+ T-cell responses during chronic viral infection. Whether PD-1 expression influences the virus-specific CD8+ T cells in humans with acute viral infection remains largely undefined. This study aims to characterize the PD-1 expression during acute hepatitis B (AHB), and further addresses the association between the PD-1 dynamics and memory T-cell formation during acute HBV infection. METHODS: Peripheral HBV-specific CD8+ T cells from 11 HLA-A2-positive AHB patients were longitudinally quantitatively analyzed, and PD-1, memory markers CCR7, CD45RA and CD127 and activation marker CD38 on HBV-specific CD8+ T cells were measured using flow cytometric assay. Serum ALT, HBsAg, HBsAb and HBV-DNA levels were evaluated for each subject. RESULTS: All 11 AHB patients examined had multiple pentamer-positive CD8+ T-cell responses in their early phase of HBV infection. Specifically, their PD-1 on pentamer-positive CD8+ T-cells was significantly up-regulated at the onset of their disease. Following their disease resolution, the dynamic decrease in PD-1 expression was found to correlate with the phenotypic development of memory CD8+ T cells, indicated by the increases in CCR7, CD45RA and CD127 and decrease in CD38. CONCLUSION: PD-1-mediated negative signaling may be closely associated with memory T-cell formation during acute self-limited hepatitis B.
This article was published in Zhonghua Gan Zang Bing Za Zhi and referenced in Journal of Clinical & Cellular Immunology

Relevant Expert PPTs

Relevant Speaker PPTs

  • Hedef Dhafir El-Yassin
    The Immune Response of Prolactin and the Induction of Tumor Necrosis Factor (TNF) in Iraqi Patients Infected with Hepatitis C Virus
    PPT Version | PDF Version
  • Ildiko Molnar
    The role of tissue-specific type 2 5’-deiodinase enzyme activities in Graves’ orbitopathy and systemic sclerosis: a new candidate in thyroid autoimmunity
    PDF Version
  • Moshe Giladi
    Tumor Treating Fields (TTFields) induced cancer cell death may be immunogenic resulting in enhanced antitumor efficacy when combined with immune-modulating therapy
    PPT Version | PDF Version
  • M Shahnawaz Khan
    Graphene Oxide @ Gold Nanorods Conjugate for Controlled Release of Doxorubicin in tumor
    PPT Version | PDF Version
  • Ming-Yow Hung
    Innate immunity in cardiology: Vessel and valve
    PPT Version | PDF Version
  • Omar E Franco
    Heterogeneous Tumor Stroma and Prostate Carcinogenesis
    PPT Version | PDF Version
  • Yen-Chein Lai
    Molecular pathogenesis in granulosa cell tumor is not only due to somatic FOXL2 mutation
    PPT Version | PDF Version
  • Babak Behnam
    SLUG and SOX9 Cooperatively Regulate Tumor Initiating Niche Factors in Breast Cancer
    PPT Version | PDF Version
  • Yosef Yarden
    Classically, the 3’untranslated region (3’UTR) is that region in eukaryotic protein-coding genes from the translation termination codon to the polyA signal. It is transcribed as an integral part of the mRNA encoded by the gene. However, there exists another kind of RNA, which consists of the 3’UTR alone, without all other elements in mRNA such as 5’UTR and coding region. The importance of independent 3’UTR RNA (referred as I3’UTR) was prompted by results of artificially introducing such RNA species into malignant mammalian cells. Since 1991, we found that the middle part of the 3’UTR of the human nuclear factor for interleukin-6 (NF-IL6) or C/EBP gene exerted tumor suppression effect in vivo. Our subsequent studies showed that transfection of C/EBP 3’UTR led to down-regulation of several genes favorable for malignancy and to up-regulation of some genes favorable for phenotypic reversion. Also, it was shown that the sequences near the termini of the C/EBP 3’UTR were important for its tumor suppression activity. Then, the C/EBP 3’UTR was found to directly inhibit the phosphorylation activity of protein kinase CPKC in SMMC-7721, a hepatocarcinoma cell line. Recently, an AU-rich region in the C/EBP 3’UTR was found also to be responsible for its tumor suppression. Recently we have also found evidence that the independent C/EBP 3’UTR RNA is actually exists in human tissues, such as fetal liver and heart, pregnant uterus, senescent fibroblasts etc. Through 1990’s to 2000’s, world scientists found several 3’UTR RNAs that functioned as artificial independent RNAs in cancer cells and resulted in tumor suppression. Interestingly, majority of genes for these RNAs have promoter-like structures in their 3’UTR regions, although the existence of their transcribed products as independent 3’UTR RNAs is still to be confirmed. Our studies indicate that the independent 3’UTR RNA is a novel non-coding RNA species whose function should be the regulation not of the expression of their original mRNA, but of some essential life activities of the cell as a whole.
    PPT Version | PDF Version
  • Fan-Gang Tseng
    Fan-Gang-Tseng-National-Tsing-Hua-University-Taiwan-Nano-Micro-fluidic-systems-for-circulating-Tumor-Cells-(CTCs)-rapid-detection-and-diagnosis
    PPT Version | PDF Version
  • Myron R Szewczuk
    Therapeutic targeting neuraminidase-1 in multi-stage of tumorigenesis
    PPT Version | PDF Version
  • Hawa ZE Jaafar
    Involvement of elicitated Labisia pumila Benth. biofluids in the alleviation of chemotoxicity effect and antitumor activity
    PPT Version | PDF Version
  • Huidi Liu
    Reduced Expression of SOX7 in Ovarian Cancer: a Novel Tumor Suppressor through the Wnt/β-catenin Signaling Pathway
    PPT Version | PDF Version
  • Alex Soltermann
    Lung neuroendocrine tumors: Correlation of ubiquitinylation and sumoylation with nucleo-cytosolic partitioning of PTEN
    PPT Version | PDF Version
  • Fu Shi Quan
    Influenza virus-like particle vaccines elicit protective immunity in the early stage of vaccination
    PPT Version | PDF Version

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords