Green tea polyphenols reduce autoimmune symptoms in a murine model for human Sjogren's syndrome and protect human salivary acinar cells from TNF-a-induced cytotoxicity

Stephen Hsu, Douglas P. Dickinson, Haiyan Qin, James Borke, Kalu U.E. Ogbureke, Julia N. Winger, Amy M. Camba, Wendy B Bollag, Hubert J. Stöppler, Mohamed M.H. Sharawy, George S. Schuster

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Sjogren's syndrome (SS) is a relatively common autoimmune disorder. A key feature of SS is lymphocytic infiltration of the salivary and lacrimal glands, associated with the destruction of secretory functions of these glands. Current treatment of SS targets the symptoms but is unable to reduce or prevent the damage to the glands. We reported previously that the major green tea polyphenol (GTP) epigallocatechin-3-gallate (EGCG) inhibits autoantigen expression in normal human keratinocytes and immortalized normal human salivary acinar cells (Hsu et al. 2005). However, it is not known whether GTPs have this effect in vivo, if they can reduce lymphocytic infiltration, or protect salivary acinar cells from tumor necrosis factor-α (TNF-α)-induced cytotoxicity. Here, we demonstrate that in the NOD mouse, a model for human SS, oral administration of green tea extract reduced the serum total autoantibody levels and the autoimmune-induced lymphocytic infiltration of the submandibular glands. Further, we show that EGCG protected normal human salivary acinar cells from TNF-α-induced cytotoxicity. This protection was associated with specific phosphorylation of p38 MAPK, and inhibitors of the p38 MAPK pathway blocked the protective effect. In conclusion, GTPs may provide a degree of protection against autoimmune-induced tissue damage in SS, mediated in part through activation of MAPK elements.

Original languageEnglish (US)
Pages (from-to)138-147
Number of pages10
JournalAutoimmunity
Volume40
Issue number2
DOIs
StatePublished - Mar 1 2007

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Acinar Cells
Sjogren's Syndrome
Polyphenols
Tea
Tumor Necrosis Factor-alpha
p38 Mitogen-Activated Protein Kinases
Guanosine Triphosphate
Lacrimal Apparatus
Inbred NOD Mouse
Submandibular Gland
Autoantigens
Salivary Glands
Keratinocytes
Autoantibodies
Oral Administration
Phosphorylation
Serum
epigallocatechin gallate

Keywords

  • Acinar cells
  • EGCG
  • Green tea polyphenols
  • MAPK
  • Sjogren's syndrome

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

Green tea polyphenols reduce autoimmune symptoms in a murine model for human Sjogren's syndrome and protect human salivary acinar cells from TNF-a-induced cytotoxicity. / Hsu, Stephen; Dickinson, Douglas P.; Qin, Haiyan; Borke, James; Ogbureke, Kalu U.E.; Winger, Julia N.; Camba, Amy M.; Bollag, Wendy B; Stöppler, Hubert J.; Sharawy, Mohamed M.H.; Schuster, George S.

In: Autoimmunity, Vol. 40, No. 2, 01.03.2007, p. 138-147.

Research output: Contribution to journalArticle

Hsu, Stephen ; Dickinson, Douglas P. ; Qin, Haiyan ; Borke, James ; Ogbureke, Kalu U.E. ; Winger, Julia N. ; Camba, Amy M. ; Bollag, Wendy B ; Stöppler, Hubert J. ; Sharawy, Mohamed M.H. ; Schuster, George S. / Green tea polyphenols reduce autoimmune symptoms in a murine model for human Sjogren's syndrome and protect human salivary acinar cells from TNF-a-induced cytotoxicity. In: Autoimmunity. 2007 ; Vol. 40, No. 2. pp. 138-147.
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