The etiology of Crohn's disease is still unknown. The present study served to test the hypothesis that baker's yeast (Saccharomyces cerevisiae) plays a role in Crohn's disease. Blood samples were obtained from 12 patients and 15 healthy controls. Peripheral blood leukocytes were isolated and incubated alone or with different concentrations of baker's yeast. After 3 days, the cultures were pulsed with tritiated thymidine. None of the lymphocyte cultures from healthy controls, including 3 bakers, proliferated in response to yeast. In striking contrast, all 9 patients with Crohn's disease in remission, on no medication, showed a threefold increase in their lymphocyte proliferation rate. Lymphocytes from 3 patients on 1.5 g of olsalazine maintenance therapy failed to respond. These results are consistent with previous findings that showed increased titers of IgG and IgA antibodies to baker's yeast in patients with Crohn's disease as compared to healthy controls. They confirm the suspicion that baker's yeast itself or a related antigen play a role in Crohn's disease and suggest that anti-inflammatory agents may act, in part, by inhibiting lymphocyte proliferation.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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