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Mast cell activation may explain many cases of chemical intolerance
Abstract
Background: This paper explores the relationship between chemical intolerance (CI) and mast cell activation syndrome (MCAS). Worldwide observations provide evidence for a two-stage disease process called toxicant-induced loss of tolerance (TILT) as a mechanism for CI. TILT is initiated by a major exposure event or a series of lower-level exposures. Subsequently, affected individuals report that common chemical inhalants, foods, and drugs (i.e., various xenobiotics) trigger multi-system symptoms. Purpose: To determine whether MCAS provides a plausible biological mechanism for CI/TILT. Methods: Using the validated Quick Environmental Exposure and Sensitivity Inventory (QEESI), we compared patients diagnosed with MCAS (n = 147) to individuals who reported chemical intolerances (CI/TILT) following various exposures (n = 345) and to healthy controls (n = 76). Using ANOVA, we compared QEESI scores across groups. Clinical scores for the MCAS patient group were used to predict CI status using logistic regression. Results: More than half (59%) of the MCAS group met criteria for CI. A logistic regression model illustrates that as the likelihood of patients having MCAS increased, their likelihood of having CI/TILT similarly increased, to a near-perfect correspondence at the high ends of the QEESI and clinical MCAS scores. Symptom and intolerance patterns were nearly identical for the CI and MCAS groups. Discussion: We present data suggesting that xenobiotic activation of mast cells may underlie CI/TILT. The strikingly similar symptom and intolerance patterns for MCAS and TILT suggest that xenobiotics disrupt mast cells, leading to either or both of these challenging conditions. Faced with patients suffering from complex illness affecting multiple organ systems and fluctuating inflammatory, allergic, and dystrophic symptoms, clinicians can now ask themselves two questions: (1) Could MCAS be at the root of these problems? (2) Could environmental exposures be driving MC activation and mediator release? Increasing our understanding of the connection between TILT and MCs has the potential to expose a new link between environmental exposures and illness, offering new opportunities for improving individual and public health. Conclusion: The close correspondence between QEESI scores and symptom patterns for MCAS and TILT patients supports xenobiotic-driven mast cell activation and mediator release (i.e., MCAS) as a plausible unifying biological mechanism for CI/TILT, with profound implications for medicine, public health, and regulatory toxicology.
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“Symptomatic MCAS episodes appear to be triggered by environmental exposures, for example to psychological stress, 165 sudden temperature changes or odors and chemicals. 166 In addition to triggering symptoms, environmental exposures may also contribute to MCAS etiology: A recent study has explored a possible link between MCAS and (acquired) chemical intolerance, and proposed that xenobiotic”
From Mast cell ontogeny: From fetal development to life‐long health and disease (2023) · cites this paper as [166]
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Valent, P., Akin, C., Arock, M., Brockow, K., Butterfield, J. H., Carter, M. C., Castells, M., Escribano, L., Hartmann, K., Lieberman, P., et al. (2012) · International Archives of Allergy and Immunology · doi:10.1159/000328760 · Cited by 654
Molderings, G. J., Brettner, S., Homann, J., & Afrin, L. B. (2011) · Journal of Hematology & Oncology · doi:10.1186/1756-8722-4-10 · Cited by 149 · cited 1×
“Patients were assigned a clinical score reflecting their likelihood of having MCAS using a validated MCAS assessment instrument [36, 37].”
MethodDiagnosis of mast cell activation syndrome: a global "consensus-2"
Afrin, L. B., Ackerley, M. B., Bluestein, L. S., Brewer, J. H., Brook, J. B., Buchanan, A. D., Cuni, J. R., Davey, W. P., Dempsey, T. T., Dorff, S. R., et al. (2021) · Diagnosis · doi:10.1515/dx-2020-0005 · Cited by 115
Self-citationCharacterization of Mast Cell Activation Syndrome
Afrin, L. B., Self, S., Menk, J., & Lazarchick, J. (2017) · The American Journal of the Medical Sciences · doi:10.1016/j.amjms.2016.12.013 · Cited by 101
Self-citationMast Cell Activation Syndrome: A Primer for the Gastroenterologist
Weinstock, L. B., Pace, L. A., Rezaie, A., Afrin, L. B., & Molderings, G. J. (2021) · Digestive Diseases and Sciences · doi:10.1007/s10620-020-06264-9 · Cited by 59 · cited 1×
“…opposed to the cellular, immune sys-tem; (2) MCs’ typically tiny numbers and their sparse distribution in most tissues have contributed to their anonymity; and (3) MCs are minimally present in the blood, and even where they are present, it has been a challenge to identify and isolate them [16–20].”
BackgroundSelf-citationMolderings, G. J., Meis, K., Kolck, U. W., Homann, J., & Frieling, T. (2010) · Immunogenetics · doi:10.1007/s00251-010-0474-8 · Cited by 58
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Metadata
- Authors
- Miller, C. S., Palmer, R. F., Dempsey, T. T., Ashford, N. A., & Afrin, L. B.
- ORCID
- Palmer, Raymond F.
- Venue
- Environmental Sciences Europe
- Published
- 2021-11-17
- Volume
- 33
- Issue
- 1
- ISSN
- 2190-4707
- 2190-4715
- Cited by
- 31
- References
- 6
- Language
- en
- Funders
- Marilyn Brachman Hoffman Foundation Fort Worth TX
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