Abnormalities of immunosuppression in patients with hepatosplenic schistosomiasis mansoni.

D. J. Tweardy, G. S. Osman, A. El Kholy, J. J. Ellner

Research output: Contribution to journalArticle

Abstract

The basis for development of hepatosplenic disease and attendant morbidity in only a minority of S. mansoni-infected individuals is uncertain but may relate to defective modulation of immunopathology. We explored the possibility that schistosomiasis mansoni with hepatosplenomegaly is characterized by failure of immunosuppressive mechanisms. Individuals (14-30 years of age) from an agricultural village in the Nile Delta were selected for study: 12 were uninfected, 9 had S. mansoni infection and hepatosplenomegaly (mean fecal egg excretion 1267 +/- 197 eggs/g), 32 were infected but lacked hepatosplenomegaly (1142 +/- 79 eggs/g). The ratio of OKT4 helper/OKT8 suppressor cells in PBMC was increased in the group with hepatosplenomegaly to 2.7 +/- 0.3 compared to a ratio of 1.7 +/- 0.1 (p less than 0.01) in uninfected subjects; in contrast, this ratio was reduced in infected subjects without hepatosplenomegaly to 1.4 +/- 0.1 (p less than 0.05). Schistosome antigen-induced [3H]thymidine incorporation in PBMC was similar in infected subjects, with hepatosplenomegaly (3329 +/- 738 cpm) and without (5837 +/- 1009 cpm, p greater than 0.01). However, depletion of suppressor adherent cells significantly increased the responses only in the group lacking organomegaly (14,028 +/- 1,683 cpm, p less than 0.001). Thus, among subjects with S. mansoni infection, those with hepatosplenomegaly are distinctive in their failure to develop an immunosuppressive balance of T lymphocyte subpopulations and in the absence of functional adherent suppressor cells.

Original languageEnglish (US)
Pages (from-to)392-400
Number of pages9
JournalTransactions of the Association of American Physicians
Volume96
StatePublished - 1983
Externally publishedYes

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Schistosomiasis mansoni
Immunosuppression
Immunosuppressive Agents
Eggs
Lymphocyte Subsets
Infection
Thymidine
Ovum
Morbidity
T-Lymphocytes
Antigens

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Abnormalities of immunosuppression in patients with hepatosplenic schistosomiasis mansoni. / Tweardy, D. J.; Osman, G. S.; El Kholy, A.; Ellner, J. J.

In: Transactions of the Association of American Physicians, Vol. 96, 1983, p. 392-400.

Research output: Contribution to journalArticle

Tweardy, D. J. ; Osman, G. S. ; El Kholy, A. ; Ellner, J. J. / Abnormalities of immunosuppression in patients with hepatosplenic schistosomiasis mansoni. In: Transactions of the Association of American Physicians. 1983 ; Vol. 96. pp. 392-400.
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