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Journal of Dental Research
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Immunoglobulin Isotypes in Human Minor Gland Saliva

D.J. Smith

Department of Immunology, Forsyth Dental Center, 140 The Fenway, Boston, Massachusetts 02115

M.A. Taubman

Department of Immunology, Forsyth Dental Center, 140 The Fenway, Boston, Massachusetts 02115

P. Ali-Salaam

Department of Immunology, Forsyth Dental Center, 140 The Fenway, Boston, Massachusetts 02115

Lower labial, upper labial, palatine (minor), and parotid (major) gland saliva samples from 18 young adult males were quantitatively assayed for the presence of IgAl, IgA2, IgM, and IgG. The mean (± standard deviation) concentrations of IgA (sum of IgAl + IgA2) were 79 ± 42 µg/mL (parotid), 111 ± 42 µg/mL (lower labial), 69 ± 72 µg/mL (upper labial), and 88 ± 68 µg/mL (palatine). Total IgA concentrations were positively correlated among different minor-gland samples from the same subject, although these correlations did not reach significance. Upper-labial-gland saliva samples contained significantly (at least p<0.05) lower concentrations of IgAl than those found in parotid or lower-labial minor-gland secretions. All three minor-gland sources of saliva contained significantly (p<0.002) higher levels of IgG than did parotid saliva. Upper-labial fluids had significantly (p<0.02) higher IgG concentrations than lower-labial saliva. IgM could be detected in 89% of parotid saliva samples and 75% of the palatine saliva samples. Palatine IgM concentrations (8.2 ± 17.8 µg/ mL) were significantly (p<0.05) higher than parotid IgM concentrations (0.6 ± 0.4 µg/mL). IgM was detected much less frequently and at lower concentrations in lower- and upper-labial-gland saliva. These data reveal that minor-gland saliva from different oral sites may contain distinctive immunoglobulin isotype patterns, and expressions of host defense may vary within each micro-environment.

Journal of Dental Research, Vol. 70, No. 3, 167-170 (1991)
DOI: 10.1177/00220345910700030201
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D.J. Smith, K. Joshipura, R. Kent, and M.A. Taubman
Effect of Age on Immunoglobulin Content and Volume of Human Labial Gland Saliva
Journal of Dental Research, December 1, 1992; 71(12): 1891 - 1894.
[Abstract] [PDF]