Comment; Good study on the harms from even a single dose, but also lower doses given repetitively over a period of time and how it alters gene expression of nerve cells involved in the sense of smell. These nerves take a very short path to the mid-brain which manages a lot of our day to day metabolic activities–very dangerous! Satratoxin G is one of the trichothecene toxins produced by black mold. This class has been used by the US Dept of Defense as a bioweapon.
Islam Z1, Harkema JR, Pestka JJ.
Author information
1Center for Integrative Toxicology, Department of Microbiology and Molecular Genetics, and Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA.
Abstract
Satratoxin G (SG) is a macrocyclic trichothecene mycotoxin produced by Stachybotrys chartarum, the “black mold” suggested to contribute etiologically to illnesses associated with water-damaged buildings. Using an intranasal instillation model in mice, we found that acute SG exposure specifically induced apoptosis of olfactory sensory neurons (OSNs) in the olfactory epithelium. Dose-response analysis revealed that the no-effect and lowest-effect levels at 24 hr postinstillation (PI) were 5 and 25 microg/kg body weight (bw) SG, respectively, with severity increasing with dose. Apoptosis of OSNs was identified using immunohistochemistry for caspase-3 expression, electron microscopy for ultrastructural cellular morphology, and real-time polymerase chain reaction for elevated expression of the proapoptotic genes Fas, FasL, p75NGFR, p53, Bax, caspase-3, and CAD. Time-course studies with a single instillation of SG (500 microg/kg bw) indicated that maximum atrophy of the olfactory epithelium occurred at 3 days PI. Exposure to lower doses (100 microg/kg bw) for 5 consecutive days resulted in similar atrophy and apoptosis, suggesting that in the short term, these effects are cumulative. SG also induced an acute, neutrophilic rhinitis as early as 24 hr PI. Elevated mRNA expression for the proinflammatory cytokines tumor necrosis factor-alpha, interleukin-6 (IL-6) , and IL-1 and the chemokine macrophage-inflammatory protein-2 (MIP-2) were detected at 24 hr PI in both the ethmoid turbinates of the nasal airways and the adjacent olfactory bulb of the brain. Marked atrophy of the olfactory nerve and glomerular layers of the olfactory bulb was also detectable by 7 days PI along with mild neutrophilic encephalitis. These findings suggest that neurotoxicity and inflammation within the nose and brain are potential adverse health effects of exposure to satratoxins and Stachybotrys in the indoor air of water-damaged buildings.
- COVID UPDATE: What is the truth? - 2022-11-08
- Pathologist Speaks Out About COVID Jab Effects - 2022-07-04
- A Massive Spike in Disability is Most Likely Due to a Wave of Vaccine Injuries - 2022-06-30
