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At least 145 records · Page 8Linked to original sources
PubMed2002

Stachyflin and acetylstachyflin, novel anti-influenza A virus substances, produced by Stachybotrys sp. RF-7260. II. Synthesis and preliminary structure-activity relationships of stachyflin derivatives.

Stachyflin and acetylstachyflin, produced by Stachybotrys sp. RF-7260, were found to have potent anti-influenza A virus activity. Stachyflin is a new class of hemagglutinin fusion inhibitors of influenza A virus. Several derivatives were synthesized from acetylstachyflin and subjected to preliminary examination of their structure-activity relationships. Among them, the 3-oxo and 3,8'-dioxo derivatives showed potent antiviral activity similar to stachyflin. The 3-epi derivative was four times less active than stachyflin. Modification of the 6'-hydroxy group and the C-5' position markedly diminished the antiviral activity.

Animals↗
PubMed2003

Total synthesis and structure revision of stachybotrys spirolactams.

The spirolactam structure 1 reported in 1996 by Roggo et al. has been enantioselectively synthesized in 20 steps from (+)-Wieland-Miescher ketone. Spectra of this synthetic lactam differed from those of the natural spirolactam from the Roggo group, leading to the hypothesis that the natural lactam may be the regioisomer 27, a structure previously ascribed by Jarvis et al. to the natural product stachybotrylactam. This hypothesis was confirmed by the first total synthesis of (-)-stachybotrylactam (27). Double reductive amination of two molecules of aldehyde 29 with one molecule of l-lysine led by analogous chemistry to the first synthesis of the pseudosymmetric "dimer" 30, whose spectra corresponded to those of the natural "dimer" originally assigned structure 5 by the Roggo group.

Aldehydes↗
PubMed2003

ELISA measurement of stachylysin in serum to quantify human exposures to the indoor mold Stachybotrys chartarum.

The goal of this research was to develop a measurable indicator of human exposure to Stachyborys chartarum. Antibodies were produced against the hemolytic agent stachylysin obtained from the mold S. chartarum. These antibodies were used to develop two enzyme-linked immunosorbent assay methods for the analysis of stachylysin in human and rat sera and environmental samples. Stachylysin was measured in rat pups that received nasal instillations of S. chartarum conidia but not in control rat serum. Stachylysin in the serum of five human adults exposed to S. chartarum in water-damaged environments was 371 ng/mL but none was detected in the control serum. Stachylysin was also quantified in spore, wallboard, mycelial, and dust samples. The measurement of stachylysin may be a useful indicator in assessing human exposure to S. chartarum and in determining the presence of this indoor mold.

Air Pollution, Indoor↗
PubMed2003

Toxic mold and mycotoxins in neurotoxicity cases: Stachybotrys, Fusarium, Trichoderma, Aspergillus, Penicillium, Cladosporium, Alternaria, Trichothecenes.

Presented is the argument that psychologists and neuropsychologists have no scientific basis for rendering opinions about causation given the current state of the literature. The critical question is whether in a residence or office inhalation of mold spores or mold metabolites, including mycotoxins, causes neuropsychological impairment or mental and emotional disorders. There has not been sufficient research to support such conclusions. Nonetheless, in the context of litigation, speculative opinions are rendered in lieu of scientifically well-founded conclusions. Resources for recognizing and coping with pseudoscientific arguments are suggested.

Alternaria↗
PubMed1995

Stachybocins, novel endothelin receptor antagonists, produced by Stachybotrys sp. M6222. II. Structure determination of stachybocins A, B and C.

The structures of stachybocins A, B and C, new endothelin receptor antagonist, were determined by NMR spectral analysis using pulse-field-gradient technique. Stachybocin A consists of two spirobenzofuran units each fused to a substituted decalin, which were connected by a lysine residue. Stachybocins B and C are derivatives of stachybocin A with an additional hydroxy group at the same position in the different decalin unit.

Benzofurans↗