Sulphur mustard [bis(2 chloro ethyl) sulfide] (SM), a bifunctional alkylating agent has been frequently used as a chemical warfare agent. In the present study, the effects of sodium 2 3 dimercaptopropane sulphonic ...Sulphur mustard [bis(2 chloro ethyl) sulfide] (SM), a bifunctional alkylating agent has been frequently used as a chemical warfare agent. In the present study, the effects of sodium 2 3 dimercaptopropane sulphonic acid (DMPS) on some biochemical and histological parameters in mice, exposed to 1/4LC 50 concentration of SM vapor (10.5 mg/m\+3) were examined over a period of seven days. Exposure of SM resulted in a significant loss of blood, hepatic and pulmonary glutathione (GSH) and an elevation of hepatic and pulmonary oxidized glutathione (GSSG). These biochemical changes were accompanied by a number of histopathological alterations. The most prominent was congestion and degeneration in viscera and obliteration of chromatin material. These biochemical and histopathological changes were less marked in animals pre administered with DMPS followed by DMPS exposure indicating some protective value of the thiol (DMPS) against SM induced oxidative injury in mice.展开更多
Toxic effects of inhaled sulfur mustard (SM) on the histology of visceral organs was investigaed by exposing mice to 84. 6mg/m3 for 1h duration, using controlled single exposure conditions. A progressive fall in body...Toxic effects of inhaled sulfur mustard (SM) on the histology of visceral organs was investigaed by exposing mice to 84. 6mg/m3 for 1h duration, using controlled single exposure conditions. A progressive fall in body weight from third day onwards was noticed. Light microscopic examination of the pulmonary tissue of these animals at 6 h post exposure revealed that the tracheobronchial epithelium remained intact, but was infiltrated by inflammatory cells. By 24 h post exposure, the mucosecretory cells were destroyed. The indanunatory reaction was maximum at 48 h. By 7th day post exposure there was swelling and vacuolation of lung parenchymal cells and thrombi formation. In addition SM caused congestion and hemorrhage at alveolar level. SM also caused granulovacuolar degeneration with perinuclear clumping of the cytopasm of hepatocytes and renal parenchymal cells. Renallesions were chazacterized by congestion and hemorrhage. Among visceral tissues, maximum atrophywas observed in spleen. Distribution of lesions increased with post exposure period. The maximum lesions were observed at 7th day post-exposure.展开更多
To review long-term respiratory effects of mustard gas on Iranian veterans having undergone Iraq- Iran war. Electronic databases of Scopus, Medline, ISI, IranMedex, and Irandoc sites were searched. We accepted article...To review long-term respiratory effects of mustard gas on Iranian veterans having undergone Iraq- Iran war. Electronic databases of Scopus, Medline, ISI, IranMedex, and Irandoc sites were searched. We accepted articles published in scientific journals as a quality criterion. The main pathogenic factors are free radical mediators. Preva- lence of pulmonary involvement is approximately 42.5%. The most common complaints are cough and dyspnea. Major respiratory complications are chronic obstructive pulmo- nary disease, bronchiectasis, and asthma. Spirometry re- sults can reveal restrictive and obstructive pulmonary disease. Plain chest X-ray does not help in about 50% of lung diseases. High-resolution CT of the lung is the best modality for diagnostic assessment of parenchymal lung and bronchi. There is no definite curative treatment for mus- tard lung. The effective treatment regimens consist of oxy-gen administration, use of vaporized moist air, respiratory physiotherapy, administration of mucolytic agents, bronchodilators, corticosteroids, and long-acting beta-2 agonists, antioxidants, surfactant, magnesium ions, thera- peutic bronchoscopy, laser therapy, placement of respira- tory stents, early tracheostomy in laryngospasm, and ulti- mately lung transplantation. High-resolution CT of the lung is the most accurate modality for the evaluation of the lung parenchyma and bronchi. The treatment efficacy of patients exposed to mustard gas depends on patient conditions （acute or chronic, upper or lower respiratory tract involvement）. There are various treatment protocols, but unfortunately none of them is definitely curable.展开更多
Effective medications for the treatment of cancer were nonexistent in the early twentieth century.Ironically the widespread use of toxic chemical weapons,chlorine and sulfur mustard gas,during the"Great War"...Effective medications for the treatment of cancer were nonexistent in the early twentieth century.Ironically the widespread use of toxic chemical weapons,chlorine and sulfur mustard gas,during the"Great War"led to the first successful chemotherapeutic treatment of cancer patients.Soon after the introduction of poisonous gas on the battlefield,reports of the resulting pancytopenia in exposed combatants appeared in the medical literature.The biologic effect of chemical weaponry on rapidly dividing cells eventually was recognized for its salutary potential in the treatment of cancer.Once this potential was appreciated,hundreds of similar compounds were synthesized and evaluated as chemotherapeutic agents.One such compound,thioT EPA,would eventually open the era of intravesical treatment of urothelial cancer.展开更多
文摘Sulphur mustard [bis(2 chloro ethyl) sulfide] (SM), a bifunctional alkylating agent has been frequently used as a chemical warfare agent. In the present study, the effects of sodium 2 3 dimercaptopropane sulphonic acid (DMPS) on some biochemical and histological parameters in mice, exposed to 1/4LC 50 concentration of SM vapor (10.5 mg/m\+3) were examined over a period of seven days. Exposure of SM resulted in a significant loss of blood, hepatic and pulmonary glutathione (GSH) and an elevation of hepatic and pulmonary oxidized glutathione (GSSG). These biochemical changes were accompanied by a number of histopathological alterations. The most prominent was congestion and degeneration in viscera and obliteration of chromatin material. These biochemical and histopathological changes were less marked in animals pre administered with DMPS followed by DMPS exposure indicating some protective value of the thiol (DMPS) against SM induced oxidative injury in mice.
文摘Toxic effects of inhaled sulfur mustard (SM) on the histology of visceral organs was investigaed by exposing mice to 84. 6mg/m3 for 1h duration, using controlled single exposure conditions. A progressive fall in body weight from third day onwards was noticed. Light microscopic examination of the pulmonary tissue of these animals at 6 h post exposure revealed that the tracheobronchial epithelium remained intact, but was infiltrated by inflammatory cells. By 24 h post exposure, the mucosecretory cells were destroyed. The indanunatory reaction was maximum at 48 h. By 7th day post exposure there was swelling and vacuolation of lung parenchymal cells and thrombi formation. In addition SM caused congestion and hemorrhage at alveolar level. SM also caused granulovacuolar degeneration with perinuclear clumping of the cytopasm of hepatocytes and renal parenchymal cells. Renallesions were chazacterized by congestion and hemorrhage. Among visceral tissues, maximum atrophywas observed in spleen. Distribution of lesions increased with post exposure period. The maximum lesions were observed at 7th day post-exposure.
文摘To review long-term respiratory effects of mustard gas on Iranian veterans having undergone Iraq- Iran war. Electronic databases of Scopus, Medline, ISI, IranMedex, and Irandoc sites were searched. We accepted articles published in scientific journals as a quality criterion. The main pathogenic factors are free radical mediators. Preva- lence of pulmonary involvement is approximately 42.5%. The most common complaints are cough and dyspnea. Major respiratory complications are chronic obstructive pulmo- nary disease, bronchiectasis, and asthma. Spirometry re- sults can reveal restrictive and obstructive pulmonary disease. Plain chest X-ray does not help in about 50% of lung diseases. High-resolution CT of the lung is the best modality for diagnostic assessment of parenchymal lung and bronchi. There is no definite curative treatment for mus- tard lung. The effective treatment regimens consist of oxy-gen administration, use of vaporized moist air, respiratory physiotherapy, administration of mucolytic agents, bronchodilators, corticosteroids, and long-acting beta-2 agonists, antioxidants, surfactant, magnesium ions, thera- peutic bronchoscopy, laser therapy, placement of respira- tory stents, early tracheostomy in laryngospasm, and ulti- mately lung transplantation. High-resolution CT of the lung is the most accurate modality for the evaluation of the lung parenchyma and bronchi. The treatment efficacy of patients exposed to mustard gas depends on patient conditions （acute or chronic, upper or lower respiratory tract involvement）. There are various treatment protocols, but unfortunately none of them is definitely curable.
基金Supported by The Frank D Stranahan Endowment for Oncologic Research
文摘Effective medications for the treatment of cancer were nonexistent in the early twentieth century.Ironically the widespread use of toxic chemical weapons,chlorine and sulfur mustard gas,during the"Great War"led to the first successful chemotherapeutic treatment of cancer patients.Soon after the introduction of poisonous gas on the battlefield,reports of the resulting pancytopenia in exposed combatants appeared in the medical literature.The biologic effect of chemical weaponry on rapidly dividing cells eventually was recognized for its salutary potential in the treatment of cancer.Once this potential was appreciated,hundreds of similar compounds were synthesized and evaluated as chemotherapeutic agents.One such compound,thioT EPA,would eventually open the era of intravesical treatment of urothelial cancer.
