Poisonous organisms are represented in many taxa, including kingdom Animalia. During evolution, animals have developed special organs for production and injection of venoms. Animal venoms are complex mixtures, composi...Poisonous organisms are represented in many taxa, including kingdom Animalia. During evolution, animals have developed special organs for production and injection of venoms. Animal venoms are complex mixtures, compositions of which depend on species producing venom. The most known and studied poisonous terrestrial animals are snakes, scorpions and spiders. Among marine animals, these are jellyfishes, anemones and cone snails. The toxic substances in the venom ofthese animals are mainly of protein and peptide origin. Recent studies have indicated that the single venom may contain up to several hundred different components producing diverse physiological effects. Bites or stings by certain poisonous species result in severe envenomations leading in some cases to death. This raises the problem of bite treatment. The most effective treatment so far is the application of antivenoms. To enhance the effectiveness of such treatments, the knowledge of venom composition is needed. On the other hand, venoms contain substances with unique biological properties, which can be used both in basic science and in clinical applications. The best example of toxin application in basic science is α-bungarotoxin the discovery of which made a big impact on the studies of nicotinic acetylcholine receptor. Today compositions of venom from many species have already been examined. Based on these data, one can conclude that venoms contain a large number of individual components belonging to a limited number of structural types. Often minor changes in the amino acid sequence give rise to new biological properties. Change in the living conditions of poisonous animals lead to alterations in the composition of venoms resulting in appearance of new toxins. At the same time introduction of new methods of proteomics and genomics lead to discoveries of new compounds, which may serve as research tools or as templates for the development of novel drugs. The application of these sensitive and comprehensive methods allows studying either of venoms available in tiny amounts or of low abundant components in already known venoms.展开更多
Biogenic amines are known to have various biological functions such as not only neurotransmitter and cell proliferation but also food poisoning. Bacterially-decomposed amines such as histamine, agmatine, putrescine, c...Biogenic amines are known to have various biological functions such as not only neurotransmitter and cell proliferation but also food poisoning. Bacterially-decomposed amines such as histamine, agmatine, putrescine, cadaverine, spermidine and spermine cause allergic symptoms. We developed simple method for measurement of polyamine as indicator of food decomposition with a fluorometer by using 4-(1-Pyrene)butyric acid N-hydroxysuccinimide ester (PSE). PSE reacts with primary and secondary amino moieties of polyamines and produces the intramolecular excimer fluorescence. Excimer fluorescence with broad peak at around 470 nm was clearly detected in linear type biogenic amines such as putrescine, cadaverine, spermidine and spermine at 10 mM. However neither histamine nor trimethylamine altered the fluorescence. Decomposed sardine and mackerel by improper storage showed stronger intensity than fresh ones. Comparing with OPA-method, PSE method was useful for screening biogenic amines present in food, esp. fish since the analysis was simple after one-step purification procedure. An inexpensive system which can rapidly detect biogenic amines from food is necessary in a medium and small-sized food business. The technique using excimer has potential to realize the high through-put screening system for evaluation of food freshness and is expected to bring the public interests such as food security and safety of consumer.展开更多
Puffer fish poisoning is a common seafood poisoning.The problem is due to tetradotoxin in puffy fish meat.It can be seen in many countries with seacoasts.The problem is resulted from tetradotoxin(TTX)in puffer fish me...Puffer fish poisoning is a common seafood poisoning.The problem is due to tetradotoxin in puffy fish meat.It can be seen in many countries with seacoasts.The problem is resulted from tetradotoxin(TTX)in puffer fish meat.This toxin is an important natural toxin.Here,the authors report summary of case reports from Thailand.The authors use standard search engines(PubMed and Thai Index Medicus)for searching on the reports on puffer fish poisoning from Thailand.According to this work,there are at least 3 reports on 55 cases of puffer fish poisoning.All cases visit to the physician within 30 min.Focusing on severity,stage 1,2,3 and 4 can be seen in 16%,8%,4%and 72%,respectively.In the present report,the summary of the cases presenting to the physician at hospital is shown.Of interest,most patients have severe intoxication and the respirator failure is an important problem to be managed.It is clearly shown in the present report that if good respiratory support is done,the full recovery without problem can be derived.It is no doubt that there is no death case in the present series since the present report focuses on the cases that are successfully delivered to the hospital for management.展开更多
Objective To evaluate the safety and efficacy of early high intensity blood purification for severe wasp venom poisoning with acute kidney injury(AKI).Methods We retrospectively analyzed 120 patients[(47±14)year,...Objective To evaluate the safety and efficacy of early high intensity blood purification for severe wasp venom poisoning with acute kidney injury(AKI).Methods We retrospectively analyzed 120 patients[(47±14)year,F/M=68/52]with severe wasp venom poisoning(creatine kinase>20,000 IU/L;lactic展开更多
基金Supported by The research funding from Russian Foundation for Basic Research,No.15-04-01843
文摘Poisonous organisms are represented in many taxa, including kingdom Animalia. During evolution, animals have developed special organs for production and injection of venoms. Animal venoms are complex mixtures, compositions of which depend on species producing venom. The most known and studied poisonous terrestrial animals are snakes, scorpions and spiders. Among marine animals, these are jellyfishes, anemones and cone snails. The toxic substances in the venom ofthese animals are mainly of protein and peptide origin. Recent studies have indicated that the single venom may contain up to several hundred different components producing diverse physiological effects. Bites or stings by certain poisonous species result in severe envenomations leading in some cases to death. This raises the problem of bite treatment. The most effective treatment so far is the application of antivenoms. To enhance the effectiveness of such treatments, the knowledge of venom composition is needed. On the other hand, venoms contain substances with unique biological properties, which can be used both in basic science and in clinical applications. The best example of toxin application in basic science is α-bungarotoxin the discovery of which made a big impact on the studies of nicotinic acetylcholine receptor. Today compositions of venom from many species have already been examined. Based on these data, one can conclude that venoms contain a large number of individual components belonging to a limited number of structural types. Often minor changes in the amino acid sequence give rise to new biological properties. Change in the living conditions of poisonous animals lead to alterations in the composition of venoms resulting in appearance of new toxins. At the same time introduction of new methods of proteomics and genomics lead to discoveries of new compounds, which may serve as research tools or as templates for the development of novel drugs. The application of these sensitive and comprehensive methods allows studying either of venoms available in tiny amounts or of low abundant components in already known venoms.
文摘Biogenic amines are known to have various biological functions such as not only neurotransmitter and cell proliferation but also food poisoning. Bacterially-decomposed amines such as histamine, agmatine, putrescine, cadaverine, spermidine and spermine cause allergic symptoms. We developed simple method for measurement of polyamine as indicator of food decomposition with a fluorometer by using 4-(1-Pyrene)butyric acid N-hydroxysuccinimide ester (PSE). PSE reacts with primary and secondary amino moieties of polyamines and produces the intramolecular excimer fluorescence. Excimer fluorescence with broad peak at around 470 nm was clearly detected in linear type biogenic amines such as putrescine, cadaverine, spermidine and spermine at 10 mM. However neither histamine nor trimethylamine altered the fluorescence. Decomposed sardine and mackerel by improper storage showed stronger intensity than fresh ones. Comparing with OPA-method, PSE method was useful for screening biogenic amines present in food, esp. fish since the analysis was simple after one-step purification procedure. An inexpensive system which can rapidly detect biogenic amines from food is necessary in a medium and small-sized food business. The technique using excimer has potential to realize the high through-put screening system for evaluation of food freshness and is expected to bring the public interests such as food security and safety of consumer.
文摘Puffer fish poisoning is a common seafood poisoning.The problem is due to tetradotoxin in puffy fish meat.It can be seen in many countries with seacoasts.The problem is resulted from tetradotoxin(TTX)in puffer fish meat.This toxin is an important natural toxin.Here,the authors report summary of case reports from Thailand.The authors use standard search engines(PubMed and Thai Index Medicus)for searching on the reports on puffer fish poisoning from Thailand.According to this work,there are at least 3 reports on 55 cases of puffer fish poisoning.All cases visit to the physician within 30 min.Focusing on severity,stage 1,2,3 and 4 can be seen in 16%,8%,4%and 72%,respectively.In the present report,the summary of the cases presenting to the physician at hospital is shown.Of interest,most patients have severe intoxication and the respirator failure is an important problem to be managed.It is clearly shown in the present report that if good respiratory support is done,the full recovery without problem can be derived.It is no doubt that there is no death case in the present series since the present report focuses on the cases that are successfully delivered to the hospital for management.
文摘Objective To evaluate the safety and efficacy of early high intensity blood purification for severe wasp venom poisoning with acute kidney injury(AKI).Methods We retrospectively analyzed 120 patients[(47±14)year,F/M=68/52]with severe wasp venom poisoning(creatine kinase>20,000 IU/L;lactic
