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[Formation of sulfhemoglobin using various drugs].
Summary
Certain aniline and hydroxylamine derivatives can induce sulfhemoglobinemia (SHb) and methemoglobinemia (MHb) in animal models. Repeated exposure to some compounds, like N-(4-chlorophenyl)-beta-(4-hydroxymethylphenoxy)ethylurethane (HPU), can induce SHb even if a single dose does not.
Area of Science:
- Toxicology
- Medicinal Chemistry
Context:
- Aniline and hydroxylamine derivatives are known to cause methemoglobinemia.
- Sulfhemoglobinemia (SHb) induction by N-(4-chlorophenyl)-beta-(4-hydroxymethylphenoxy)ethylurethane (HPU) was observed in rabbits, cats, and mice.
- The study investigates SHb and methemoglobin (MHb) formation by HPU analogs.
Purpose:
- To examine the sulfhemoglobinemia and methemoglobinemia-inducing properties of various compounds structurally related to HPU.
- To investigate the structure-activity relationship for sulfhemoglobin formation.
- To elucidate the mechanism of sulfhemoglobin formation.
Summary:
- Single intraperitoneal administration of compounds to mice revealed that phenylhydroxylamine (PHA), nitrobenzene (NB), aniline (A), chloroanilines (2-Cl-A, 3-Cl-A, 4-Cl-A), acetanilide (AA), phenacetin (PA), N-(4-chlorophenyl)ethylurethane (CPU), hydroxylamine (HA), and sodium nitrite (SN) induced methemoglobinemia (MHb).
- Sulfhemoglobinemia (SHb) was induced by single administration of PHA, 3-Cl-A, 4-Cl-A, PA, CPU, methylhydroxylamine (MHA), and SN, appearing later than MHb.
- Three consecutive administrations induced SHb by NB, 2-Cl-A, AA, HPU, and nitromethane (NM), even when not observed after a single dose.
Impact:
- Provides insights into the toxicological profiles of aniline and hydroxylamine derivatives.
- Contributes to understanding the mechanisms of hemoglobin modification by chemical compounds.
- Informs the development of safer chemical analogs and risk assessment strategies.