In a recent discussion, biochemist and toxicologist Dr. Mark Michael Blum, an expert on the Novichok nerve agent, shared insights regarding the detectability of nerve agents in human tissue. Dr. Blum, who led the team investigating the 2018 poisoning of Sergey Scribal and his daughter in the UK, explained that nerve agents, including Novichok, produce degradation products that can bind to proteins in the body, making them detectable for weeks, if not months, after exposure. He also delved into the mechanisms by which nerve agents cause death, primarily through respiratory failure, and highlighted the challenges and methodologies involved in detecting these substances post-mortem.
Nerve agents, including Novichok, produce degradation products that can bind to proteins in the body, allowing for detection weeks or months after exposure.
Even in cases of significant decomposition, it is possible to find degradation products in human tissue, as evidenced by cases such as a woman who died from Sarin poisoning and was examined weeks later.
While it is difficult to detect nerve agents from blood in a deceased body, tissue samples can provide clear evidence of exposure through specific markers.
Nerve agents inhibit the enzyme acetylcholinesterase, crucial for nerve system functions, leading to uncontrolled muscle activity, cramps, seizures, and ultimately death by respiratory failure.
Investigations into nerve agent poisonings, such as the Scribal case, demonstrate that only a small quantity of the agent is required to be lethal, and effects can have a delayed onset.
The analysis of nerve agent exposure is possible through established laboratory techniques available worldwide, including in Russian labs.
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