Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:Q9UIJ5 (Rec)
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The general health of a German shepherd dog had deteriorated slightly when it was found after being loose for one hour. After 10 hours of observation, the dog showed signs of pain for the first time and signs of poisoning, such as tenseness of muscles, slight opisthotonus, regurgitation, salivation, mydriasis, dyspnoea and cyanosis, were observed; it died 15 minutes after showing the first clinical signs but it had no seizures or tetanic spasms at any time. A postmortem examination did not reveal any pathological changes. A screening test for alkaloids was positive for strychnine (strychnidin-10-one). The presence of strychnine was confirmed and its concentration was determined by gas chromatography/mass spectrometry in urine (728.5 ng/ml) and in the stomach contents (44.6m microg/g). No strychnine was detected in the dog's serum, but traces of brucine (2,3-dimethoxystrychnidin-10-one), the dimethoxy derivative of strychnine, were detected. This case was compared with other strychnine poisonings recorded in the authors' laboratory over the previous six years, taking into account the species, type of samples, the clinical signs and their duration, the postmortem findings, and the concentrations of strychnine. This was the only case to show such an atypical time course of clinical signs.
Vet Rec 2002 Jul 06
PMID:Atypical time course of clinical signs in a dog poisoned by strychnine. 1213 20

Strychnine stands out from the group of classical natural products as one of the first complex compounds to be isolated in pure form and an extreme challenge to be structurally characterized. It has played a central role in natural product total syntheses and the surge in the development of innovative synthetic methods for many decades. Recently, we have accomplished one of the shortest formal total syntheses of strychnine (in ten steps and 14% overall yield or even shorter in eight steps and 10% overall yield). The evolution of a productive synthetic strategy, as well as the synthetic challenges tackled, are described here in detail, including examples of related transformations. The successful synthetic strategy was inspired by the premise that the core structure could be derived from simple aromatic indole precursors by a reductive SmI2 -induced ketyl-aryl coupling. Other key reactions included a diastereoselective reduction and a regioselective elimination protocol. Altogether one of the shortest syntheses of iso-strychnine and hence of strychnine was established.
Chem Rec 2015 Oct
PMID:Strychnine as Target, Samarium Diiodide as Tool: A Personal Story. 2622 66