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Sahoo SS, Pratheek BM, Meena VS, Nayak TK, Kumar PS, Bandyopadhyay S, Maiti PK, Chattopadhyay S. VIPER regulates naive T cell activation and effector responses: Implication in TLR4 associated acute stage T cell responses. Sci Rep 2018; 8:7118. [PMID: 29740052 PMCID: PMC5940837 DOI: 10.1038/s41598-018-25549-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 04/24/2018] [Indexed: 12/22/2022] Open
Abstract
Naive T cells are known to express the modest level of TLR4 while it is known to go down during TCR activation. However, information towards the requirement of TLR4 signaling during TCR or mitogenic activation of naive wild-type T cells remains scanty. Here we have investigated the endogenous functional expression of TLR4 in naive mice T cells during TCR and mitogenic stimulation in presence of VIPER peptide (VP), an established inhibitor of TLR4 signaling. As expected we found that TLR4 expression goes down during TCR and mitogenic activation. Interestingly, we observed that VP treatment restores TLR4 expression on those activated T cells. Moreover, VP was found to regulate such activation of naive T cell as evident by reduction of CD25, CD69 expression, effector cytokines (IL-2, IFN-γ, TNF) production, T cell proliferation and down-regulation of T cell activation-dependent Fas (CD95), FasL (CD95L) expression. Together, our current observation highlights a possible requirement of TLR4 responses in T cells, which might have possible implication towards the pathogenic acute phase activation of naive T cells.
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Affiliation(s)
- Subhransu Sekhar Sahoo
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | - Belluru M Pratheek
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | - Vikram S Meena
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | - Tapas Kumar Nayak
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | - P Sanjai Kumar
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | - Saumya Bandyopadhyay
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India
| | | | - Subhasis Chattopadhyay
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar, Jatni, Khurda, 752050, Odisha, India.
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Pradhan N, Pratheek B, Garai A, Kumar A, Meena VS, Ghosh S, Singh S, Kumari S, Chandrashekar T, Goswami C, Chattopadhyay S, Kar S, Maiti PK. Induction of apoptosis by Fe(salen)Cl through caspase-dependent pathway specifically in tumor cells. Can J Biotech 2017. [DOI: 10.24870/cjb.2017-a135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Pradhan N, Pratheek B, Garai A, Kumar A, Meena VS, Ghosh S, Singh S, Kumari S, Chandrashekar T, Goswami C, Chattopadhyay S, Kar S, Maiti PK. Induction of apoptosis by Fe(salen)Cl through caspase-dependent pathway specifically in tumor cells. Cell Biol Int 2014; 38:1118-31. [DOI: 10.1002/cbin.10308] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 04/14/2014] [Indexed: 12/21/2022]
Affiliation(s)
| | - B.M. Pratheek
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Antara Garai
- School of Chemical Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Ashutosh Kumar
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Vikram S. Meena
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Shyamasree Ghosh
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | | | - Shikha Kumari
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - T.K. Chandrashekar
- School of Chemical Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Chandan Goswami
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Subhasis Chattopadhyay
- School of Biological Sciences; National Institute of Science Education & Research; Bhubaneswar India
| | - Sanjib Kar
- School of Chemical Sciences; National Institute of Science Education & Research; Bhubaneswar India
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