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OBJECTIVE To assess the role of Fas-mediated apoptosis in the salivary glands of patients with primary Sjögren's syndrome (SS). METHODS Expression of Fas, Fas ligand (FasL), and bcl-2 in salivary gland biopsy material was detected in situ by immunohistochemical staining and reverse transcriptase-polymerase chain reaction. DNA fragmentation in apoptotic cells was assessed by the enzymatic incorporation of labeled nucleotides (digoxigenin-dUTP). RESULTS The acinar epithelial cells in SS were Fas+ and FasL+, and these cells died by apoptosis. The majority of infiltrating lymphocytes in SS were Fas+ and bcl-2+, while few lymphocytes expressed FasL. In situ detection of apoptosis showed minimal cell death of lymphocytes, particularly in dense periductal foci. Lymphocytic cell death was significantly lower (P < 0.0001) in these foci compared with that in the interstitium. CONCLUSIONS Infiltrating lymphocytes in the focal lesions of the salivary glands of patients with SS are blocked in their ability to commit to apoptosis, even though they may express Fas. The presence of bcl-2 in these cells may explain their inability to undergo apoptosis. The acinar epithelial cells, in contrast, may undergo Fas-mediated apoptosis. These results suggest that the Fas death pathway may be an important mechanism leading to the glandular destruction found in SS.
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
January 1992,
Autoimmunity,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
October 2000,
The Journal of rheumatology,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
July 2014,
Rheumatology (Oxford, England),
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
July 2002,
Clinical and experimental immunology,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
January 1998,
Clinical and experimental rheumatology,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
January 1986,
Scandinavian journal of rheumatology. Supplement,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
March 2002,
Human cell,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
August 1999,
Journal of autoimmunity,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
November 2007,
Autoimmunity,
L Kong, and
N Ogawa, and
T Nakabayashi, and
G T Liu, and
E D'Souza, and
H S McGuff, and
D Guerrero, and
N Talal, and
H Dang
December 2000,
Arthritis and rheumatism,
