Abstract:
:Toll-like receptor (TLR) family members are pattern recognition receptors that are essential in the activation of innate and adaptive immune responses. Submandibular gland epithelial cells (SMGCs) may recognize microbial components through TLRs and be involved in the development of inflammatory reactions in the submandibular glands. Therefore, the functional expression of TLRs in SMGCs was investigated in the present study. The mRNA expression of TLRs in SMGC and whole submandibular tissues was determined by RT-PCR. Subsequently, the effects of various TLR agonists and tumor necrosis factor alpha (TNF-α) on IL-8 production were examined using an ELISA. SMGCs, as well as whole submandibular tissues, expressed TLR1-10 mRNA. Furthermore, interleukin (IL)-8 production in SMGCs was increased by Pam3CSK4 (TLR1/2 agonist), poly I:C (TLR3 agonist), E. coli lipopolysaccharide (LPS; TLR4 agonist), flagellin (TLR5 agonist) and macrophage‑activating lipopeptide (MALP)-2 (TLR2/6 agonist) treatments in a dose‑dependent manner, whereas administration of either imiquimod (TLR7 agonist) or CpG-oligodeoxynucletide (TLR9 agonist) exerted no evident effect. Pam3CSK4, poly I:C, LPS, flagellin and MALP-2 also enhanced TNF‑α‑induced IL-8 production in SMGCs. These findings suggest that innate immune responses against microbial components result in the development of TNF-α-mediated autoimmune inflammatory disease in the submandibular glands.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Ohta K,Ishida Y,Fukui A,Mizuta K,Nishi H,Takechi M,Kamata Ndoi
10.3892/mmr.2014.2507subject
Has Abstractpub_date
2014-11-01 00:00:00pages
2377-82issue
5eissn
1791-2997issn
1791-3004journal_volume
10pub_type
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