Regna Toxicology: Research, Analysis, and Litigation Support
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Environmental and Occupational Health Professional

Joseph Regna, M.D., M.P.H.

·      Medical toxicologist and environmental- and occupational-health professional with training, expertise, and experience focused on the health impact from exposure to hazardous substances.  M.D., Boston University School of Medicine.  M.P.H., with honors, The Johns Hopkins University School of Hygiene and Public Health.


·      Particular interest in:

·      The molecular mechanisms of action of toxic chemicals and how these interactions cause changes at higher levels of biological organization—cell, tissue, organ, and organ system—that manifest in disease.

·      Environmental and occupational causation of cancer, leukemia, and lymphoma.

·      Biological effects of hazardous substances on the respiratory, immune, and central nervous systems.

·      Communicating scientific information in a way that is clear, accessible, and engaging.


·      Thorough understanding of:

·      The conduct of environmental- and occupational-health-related research, including epidemiological studies, workplace- and community-based investigations, animal experiments, and in vitro assays.

·      The scientific basis for regulation and the derivation of environmental- and occupational-health standards.

·      The risk assessment process, including hazard identification, exposure and dose analysis, and the determination of risk to exposed individuals, particularly those in highly susceptible populations.


·      Extensive experience in the determination of medical causality, that is, the determination of a causal relationship between actual, projected, or alleged exposure to hazardous substances and medical conditions:

·      Investigate exposure situations to identify the specific hazardous substances involved and to determine the extent of exposure to these substances.

·      Identify, review, and evaluate the relevant scientific literature on these substances.

·      Determine the actual and potential health effects due to exposure to hazardous substances.

·      Communicate, both orally and in writing, complex scientific information to non-scientific audiences.

·      Provide litigation support, including reports, depositions, and expert testimony.

·      Substances worked on have included chlorinated hydrocarbons, solvents, pesticides, toxic gases, particulate dusts, and metals.