Abstract:
:Tissue factor (TF) is a transmembrane glycoprotein that plays an essential role in hemostasis by activating coagulation. TF is also expressed by monocytes/macrophages as part of the innate immune response to infections. In the current study, we determined the role of TF expressed by myeloid cells during Mycobacterium tuberculosis (M. tb) infection by using mice lacking the TF gene in myeloid cells (TF(Δ) ) and human monocyte derived macrophages (MDMs). We found that during M. tb infection, a deficiency of TF in myeloid cells was associated with reduced inducible nitric oxide synthase (iNOS) expression, enhanced arginase 1 (Arg1) expression, enhanced IL-10 production and reduced apoptosis in infected macrophages, which augmented M. tb growth. Our results demonstrate that a deficiency of TF in myeloid cells promotes M2-like phenotype in M .tb infected macrophages. A deficiency in TF expression by myeloid cells was also associated with reduced fibrin deposition and increased matrix metalloproteases (MMP)-2 and MMP-9 mediated inflammation in M. tb infected lungs. Our studies demonstrate that TF expressed by myeloid cells has newly recognized abilities to polarize macrophages and to regulate M. tb growth.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Venkatasubramanian S,Tripathi D,Tucker T,Paidipally P,Cheekatla S,Welch E,Raghunath A,Jeffers A,Tvinnereim AR,Schechter ME,Andrade BB,Mackman N,Idell S,Vankayalapati Rdoi
10.1002/eji.201545817subject
Has Abstractpub_date
2016-02-01 00:00:00pages
464-79issue
2eissn
0014-2980issn
1521-4141journal_volume
46pub_type
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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