Study on the toxic mechanism of Mahuang xixin fuzi decoction based on fecal metabolomics / 中国药房

OBJECTIVE To study the toxic mechanism of Mahuang xixin fuzi decoction （MXF） on normal mice. METHODS Totally 48 SPF grade BABL/C mice were randomly divided into blank group， MXF low-dose， medium-dose and high-dose groups， with 12 mice in each group. MXF low-dose， medium-dose and high-dose groups were given drug intragastrically at the dose of 11.262， 33.786， 45.050 g/kg， respectively. Blank group was administered with equal volume of normal saline， once a day， for consecutive 7 d. The body weight， anal temperature and survival rate were recorded， organ index and serum biochemical factors were detected. After the last administration， fecal samples of mice were collected and detected by UHPLC-QE/MS. RESULTS Compared with blank group， the body weight was decreased significantly from the 3rd to the 5th day after administration in MXF medium-dose group， and from the 2nd to the 7th day after administration in MXF high-dose group significantly （P＜0.05）. There was no significant difference in anal temperature among the treatment groups； the average survival rates of MXF medium-dose and high-dose groups were 58.33% and 50.00%， respectively. Compared with blank group， there were significant difference in the indexes of spleen， lung， thymus， adrenal gland and creatine kinase in MXF low-dose， medium-dose and high-dose groups， the testis index in MXF low-dose and high-dose groups， the creatine kinase isoenzyme/creatine kinase ratio in MXF low-dose group， the α-hydroxybutyrate dehydrogenase， lactate dehydrogenase and alkaline phosphatase in MXF medium-dose group， the urine and cystatin C in MXF medium-dose and high-dose groups （P＜0.05）. The fecal metabonomic analysis showed that 19 biomarkers such as phenylpyruvate， L-tyrosine， phosphatidylcholine， glycerol 3-phosphate in MXF low-dose， medium-dose and high-dose groups were significantly different from those in the blank group. CONCLUSIONS When MXF reaches a certain dose， it will have adverse effects on the body weight， multiple organs and serum biochemical indicators of mice， thus showing a certain toxic effect. Its mechanism may be related to disrupting the intestinal flora metabolism， causing inflammatory reaction and immune disorders.

Progress on the mechanism of n-hexane induced toxic effects in vitro and in vivo / 中华劳动卫生职业病杂志

Hexane is a widely used organic solvent in industry, and chronic hexane poisoning is the main occupational toxic lesion in China. In particular, axonal and myelin lesions in the distal thick fibers of the peripheral nervous system may be caused by 2, 5-hexanedione (2, 5-HD), an intermediate metabolite of n-hexane in humans. Hexane has toxic effects not only on the nervous system but also on the liver, kidneys, and reproductive organs. In this paper, we review the progress of research on the mechanism of n-hexane toxic neuropathy.

Research progress on the exposure pathway and toxic effect of microplastics / 中国职业医学

Global plastics production has been increasing year by year. Due to the large quantity of plastics and the difficulty of their degradation, plastics are continuously accumulated in the environment. Therefore, plastic waste has become one of the most serious threats to the global environment. Microplastics can be absorbed into organisms through the mouth, respiratory tract and skin, causing organ(intestine, liver) toxicity, reproductive and developmental toxicity, and neurotoxicity. Moreover, microplastics can also take up other pollutants distributed in the surrounding environment, such as heavy metals and organic pollutants, jointly exerting combined toxic effects. The extracts of microplastics, including microplastics unstable polymers and additives, also have toxic effects. The molecular mechanisms involved in the toxic effects induced by microplastics include oxidative stress, inflammation, disturbance of intestinal flora, disturbance of gene expression, and others.

Toxic effect of silicone oil on optic nerve / 国际眼科杂志(Guoji Yanke Zazhi)

@#Silicone oil has been used as a safe and effective long-term vitreous substitute(VS)for more than 50 years. Clinically, it is currently widely used in surgical patients with severe ocular trauma and various complex vitreoretinal diseases, which has improved the prognosis of some previously incurable eye diseases. A series of toxic effects caused by the long-term retention of silicone oil in the vitreous cavity have attracted great attention. Based on the physicochemical properties of silicone oil, this review will analyze and summarize the toxic effects of silicone oil on the optic nerve, as well as its mechanism.

Toxicidade dos fitoterápicos de interesse do SUS: uma revisão / Toxicity of herbal medicines with interest to SUS: a review

No Brasil, desde sua colonização até os dias atuais são utilizados produtos de origem natural e a Agência nacional de Vigilância Epidemiológica vem instituindo regras para a regulamentação dos medicamentos fitoterápicos, sendo que foram escolhidas 71 plantas utilizadas empiricamente no país para pesquisa e comprovação de suas propriedades medicinais. Atualmente, 12 dessas 71 plantas foram liberadas para uso no Sistema Único de Saúde, sendo que as outras 59 plantas ainda necessitam de mais pesquisas para liberação do seu uso. Neste contexto, observou-se a necessidade de uma revisão dos testes toxicológicos das plantas que ainda não foram liberadas, na tentativa de impulsar e estimular novas pesquisas nesse campo. Para escolha das plantas foram utilizadas as palavras-chave: nome da planta + toxicidade/estudos toxicológicos nas línguas português e inglês nos principais bancos de dados. As 10 plantas que apresentaram maior quantidade de estudos toxicológicos foram utilizadas para a pesquisa. Para as dez plantas avaliadas, três apresentam dados completos referentes aos estudos toxicológicos exigidos pela agência nacional de Vigilância Epidemiológica. Destas, sugere-se que duas (Curcuma longa e Zingiberofficinale) sejam adotadas pelo Sistema Único de Saúde. De maneira geral, três plantas já apresentam o valor determinado para DL50, nove plantas apresentam resultados para a toxicidade reprodutiva e cinco plantas, até o presente momento, não apresentam sinais de toxicidade nos testes aplicados.

In Brazil, ever since colonization plants have been used as natural products; thus, the National Health Surveillance Agency has been establishing rules for herbal medicine regulation; in this light, 71 plant species were chosen and empirically used in the country to investigate their medicinal properties. Currently, 12 of these 71 plants have been approved to be used in SUS (Public Health System), there maining species still need further research. Thusly, this review aimed to seek information from toxicological studies on the plants that have not yet been officially approved, to stimulate new researchin the field, promoting an economical and functional impact. In order to obtain the information, the keywords plant name + toxicity and/or toxicological studies were searched in the most prominent databases, both in English and in Portuguese. The ten plants with the most references were included in this review. Among the ten plants assessed, three have all the required studies required by the National Health Surveillance Agency, two of which we recommend the immediate adoption by SUS. In general, three plants have a determined LD50, nine have reproductive toxicity data, and five have not yet shownany sign of toxicity.

Emulsión lipídica como antídoto al deterioro neurológico progresivo, tras la infiltración de altas dosis de anestésico local: a propósito de un caso / Lipid emulsion as an antidote to progressive neurological impairment after injection of high doses of local anesthetic: case report

La infiltración de anestésico local (AL) está cada vez más extendida como indicación en el tratamiento del dolor neuropático. La intoxicación por AL es poco frecuente pero grave, potencialmente mortal y de difícil manejo. Cursa con afectación del nivel de conciencia, crisis comiciales y bloqueos de la conducción cardiaca. La emulsión lipídica (EL) al 20 % es el único tratamiento específico descrito hasta la fecha y ha mejorado el pronóstico de estos casos. Presentamos el caso de un paciente con deterioro neurológico progresivo tras la infiltración de altas dosis de AL por un dolor neuropático refractario a otros tratamientos. El paciente fue tratado con emulsión lipídica al 20 % revirtiendo el cuadro neurológico de forma precoz y completa. La aparición de síntomas neurológicos progresivos en el contexto de una infiltración de anestésico local debe alertarnos sobre una posible intoxicación para iniciar tratamiento precoz con emulsión lipídica al 20 %, evitando un pronóstico infausto. Sin embargo, la prevención sigue siendo la herramienta principal.

The infiltration of local anesthetic (LA) is increasingly widespread as an indication in the treatment of neuropathic pain. AL poisoning is rare but serious, life-threatening entity and its management may be very difficult. It occurs with decreased level of consciousness, seizures and cardiac conduction blocks. The lipid emulsion (EL) 20% is the only specific treatment described to date and it has improved the prognosis of these patients. We report the case of a patient with progressive neurological deterioration after injection of high doses of LA for treat a neuropathic pain refractory to other treatments. The patient was treated with lipid emulsion 20% with reversing all the neurological symptoms early and completely. The occurrence of progressive neurological symptoms in the context of a local anesthetic infiltration, should alert us to a possible poisoning and to start early treatment with lipid emulsion 20%, to avoid poor prognosis. However, prevention remains the main tool.

Identification of synthetic food colors adulteration by paper chromatography and spectrophotometric methods

Synthetic food colors are widely used in different types of food stuffs in India as well as in the world. Changing lifestyles across the globe have transformed food habit patterns. The instant and processed foods (junk foods) are mainly used in a variety of attractive “Synthetic food colors” by its manufacturers. In the present study an attempt has been aimed to study the Extraction, Identification of Synthetic food colors adulteration by Paper chromatography and UV-Visible spectrophotometer in different sweets and jams. In the Institute of Forensic Science and Criminology (IFSC), Bundelkhand University, Jhansi, Uttar Pradesh in 2011.

Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment

p>In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce ( italic>Lactuca sativa /italic> L.) and rocket plant ( italic>Eruca sativa /italic> Mill.) and root elongation of onions ( italic>Allium cepa /italic> L.). Bioassays were performed by exposing the seeds of italic>L. sativa /italic> and italic>E. sativa /italic> and the roots of italic>A. cepa /italic> to raw leachate, treated leachate (biological treatment) and negative control (tap water). The levels of metals detected in both samples of leachate were low, and raw leachate showed high values for ammoniacal nitrogen and total Kjeldahl nitrogen. There is a reduction in the values of several physicochemical parameters, which demonstrates the efficiency of the treatment. Both italic>L. sativa /italic> and italic>A. cepa /italic>showed a phytotoxic response to landfill leachate, showing reduced root elongation. However, the responses of these two plant species were different. Root elongation was significantly lower in italic>A. cepa /italic> exposed to treated leachate, when compared to negative control, but did not show any difference when compared to raw leachate. In italic>L. sativa /italic>, seeds exposed to the raw leachate showed significant reduction in root elongation, when compared to treated leachate and negative control. Seed germination showed no difference across the treatments. The results of the study show that plant species respond differently and that municipal solid waste landfill leachate show phytotoxicity, even after biological treatment. /p>

p>No presente trabalho, a toxicidade do lixiviado (chorume) de um aterro sanitário municipal, localizado na região do Vale do Rio dos Sinos, foi avaliada utilizando bioensaios em plantas. A toxicidade do chorume foi analisada pelo teste de germinação e crescimento radicular de alface ( italic>Lactuca sativa /italic> L.) e rúcula ( italic>Eruca sativa /italic> Mill.) e pelo teste de crescimento radicular em cebola ( italic>Allium cepa /italic> L.). Os bioensaios foram realizados com a exposição de sementes de italic>L. sativa /italic> e italic>E. sativa /italic> e raízes de italic>A. cepa /italic> a amostras de chorume bruto, tratado por processo biológico e controle negativo (água de abastecimento público). Os níveis de metais detectados nas amostras de chorume foram baixos, e o chorume bruto apresentou valores elevados de nitrogênio amoniacal e nitrogênio Kjeldahl total. Ocorreu redução nos valores de vários parâmetros físico-químicos, demonstrando a eficiência do tratamento biológico. Os resultados indicam fitotoxicidade do chorume em italic>L. sativa /italic> e italic>A. cepa, /italic> evidenciada pela redução do crescimento radicular. Entretanto, as respostas destas duas espécies diferiram. O crescimento radicular foi significativamente inferior em italic>A. cepa /italic> exposta ao chorume tratado quando comparado ao controle negativo, mas não apresentou diferença quando comparado ao chorume bruto. Em italic>L. sativa /italic>, a exposição das sementes ao chorume bruto causou redução no crescimento radicular quando comparado com o chorume tratado e controle negativo. Não foram observadas diferenças entre os tratamentos para o parâmetro germinação de sementes. Os resultados deste trabalho indicam que as espécies de plantas estudadas são diferentes em suas respostas e que o chorume apresenta toxicidade, mesmo após o tratamento biológico. /p>

Ganho de peso, consumo de ração e histologia de órgãos de leitões alimentados com rações contendo baixos níveis de fumonisina B1 / Weight gain, feed consumption and histology of organs from piglets fed rations containing low levels of fumonisin B1

A fumonisina B1 (FB1) é um metabólito secundário produzido principalmente por Fusarium verticilioides em diversos tipos de alimentos, principalmente o milho, o qual constitui a base para composição de rações para várias espécies de animais domésticos. A FB1é particularmente tóxica para suínos, cujas manifestações clínicas são evidentes em animais expostos a altas concentrações de FB1 na ração (em geral, acima de 30mg/kg). No entanto, são escassos os estudos sobre os efeitos da FB1em suínos alimentados com rações contendo baixas concentrações de fumonisinas, as quais são mais prováveis de serem encontradas em condições de campo. O objetivo do estudo foi avaliar os efeitos da exposição de leitões a baixos níveis de FB1 na ração, durante 28 dias, sobre o ganho de peso, consumo de ração, peso relativo de órgãos e aspectos histológicos do baço, fígado, pulmões, rins e coração. Vinte e quatro leitões foram distribuídos em 4 grupos experimentais e alimentados com rações contendo 0mg (controle), 3,0mg, 6,0mg ou 9,0mg FB1/kg de ração. As diferentes dietas não afetaram (P>0,05) o ganho de peso e nem o peso relativo dos órgãos analisados. Não foram constatadas lesões macroscópicas ou histopatológicas no baço, fígado, rins e coração. No entanto, foram observadas lesões histopatológicas nos pulmões de todos os suínos alimentados com rações contaminadas com fumonisinas, indicando que nenhum dos níveis de FB1 usados no experimento poderia ser considerado como seguro para suínos. São necessários novos estudos sobre os mecanismos de ação tóxica da FB1 em suínos, sobretudo em condições de exposição prolongada a baixos níveis de contaminação na ração.

Fumonisin B1 (FB1) is a secondary metabolite produced mainly by Fusarium verticilioides in several types of foods, particularly corn, which is the basis for composition of feed for several domestic animals. FB1 is particularly toxic to pigs, being the clinical manifestations evident in animals exposed to high concentrations of FB1 in the diet (generally above 30mg/kg). However, there are few studies on the effects of FB1 on pigs fed rations containing low concentrations of fumonisin, which are most probably found under field conditions. The aim of the study was to evaluate the effects of a 28-day exposure of piglets to low levels of FB1 in the feed on the weight gain, feed consumption, organ weights and histological aspects of the spleen, liver, lungs, kidneys and heart. Twenty-four pigs were assigned into 4 experimental groups and fed diets containing 0mg (control), 3.0mg, 6.0mg or 9.0mg FB1/kg diet. The different diets did not affect (P>0.05) the weight gain or the weight of organs examined. There were no macroscopic or histological lesions in the spleen, liver, kidneys and heart. However, histological lesions were found in the lungs from all animals fed rations containing fumonisin, hence indicating that none of the FB1 levels used in the experiment could be considered as safe for piglets. Further studies on the mechanisms of toxic action of FB1 in pigs are needed, particularly under conditions of prolonged exposure to low contamination levels in the diet.

Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment / Avaliação da fitotoxicidade de chorume de aterro sanitário antes e após tratamento biológico

In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (Lactuca sativa L.) and rocket plant (Eruca sativa Mill.) and root elongation of onions (Allium cepa L.). Bioassays were performed by exposing the seeds of L. sativa and E. sativa and the roots of A. cepa to raw leachate, treated leachate (biological treatment) and negative control (tap water). The levels of metals detected in both samples of leachate were low, and raw leachate showed high values for ammoniacal nitrogen and total Kjeldahl nitrogen. There is a reduction in the values of several physicochemical parameters, which demonstrates the efficiency of the treatment. Both L. sativa and A. cepashowed a phytotoxic response to landfill leachate, showing reduced root elongation. However, the responses of these two plant species were different. Root elongation was significantly lower in A. cepa exposed to treated leachate, when compared to negative control, but did not show any difference when compared to raw leachate. In L. sativa, seeds exposed to the raw leachate showed significant reduction in root elongation, when compared to treated leachate and negative control. Seed germination showed no difference across the treatments. The results of the study show that plant species respond differently and that municipal solid waste landfill leachate show phytotoxicity, even after biological treatment.

No presente trabalho, a toxicidade do lixiviado (chorume) de um aterro sanitário municipal, localizado na região do Vale do Rio dos Sinos, foi avaliada utilizando bioensaios em plantas. A toxicidade do chorume foi analisada pelo teste de germinação e crescimento radicular de alface (Lactuca sativa L.) e rúcula (Eruca sativa Mill.) e pelo teste de crescimento radicular em cebola (Allium cepa L.). Os bioensaios foram realizados com a exposição de sementes de L. sativa e E. sativa e raízes de A. cepa a amostras de chorume bruto, tratado por processo biológico e controle negativo (água de abastecimento público). Os níveis de metais detectados nas amostras de chorume foram baixos, e o chorume bruto apresentou valores elevados de nitrogênio amoniacal e nitrogênio Kjeldahl total. Ocorreu redução nos valores de vários parâmetros físico-químicos, demonstrando a eficiência do tratamento biológico. Os resultados indicam fitotoxicidade do chorume em L. sativa e A. cepa, evidenciada pela redução do crescimento radicular. Entretanto, as respostas destas duas espécies diferiram. O crescimento radicular foi significativamente inferior em A. cepa exposta ao chorume tratado quando comparado ao controle negativo, mas não apresentou diferença quando comparado ao chorume bruto. Em L. sativa, a exposição das sementes ao chorume bruto causou redução no crescimento radicular quando comparado com o chorume tratado e controle negativo. Não foram observadas diferenças entre os tratamentos para o parâmetro germinação de sementes. Os resultados deste trabalho indicam que as espécies de plantas estudadas são diferentes em suas respostas e que o chorume apresenta toxicidade, mesmo após o tratamento biológico.

Occurrence, harmful effects and analytical determination of Ochratoxin A in coffee.

Coffee is an important stimulant and a good source of bioactive constituents with beneficial health effects. Coffee beans are readily attacked by the growth and proliferation of several fungal species from the genera Aspergillus and Penicillium. Ochratoxin A, an important toxin produced by these fungal entities, is commonly found in coffee products, from farm to cup-thus challenging the popularity of this world-acclaimed beverage. The toxin has been shown to be nephrotoxic and hepatotoxic, among other deleterious effects. This has prompted the European Commission to set limits for ochratoxin A in coffee products. In order to abide by these regulatory codes, various analytical methods have been developed and deployed in the analysis of the toxin in green coffee beans, roasted coffee and instant coffee. This review will discuss the occurrence of ochratoxin A, its harmful effects and various analytical methods that have been applied in its detection and quantification in coffee products.

Cadmium and Chromium Toxicity to Pseudokirchneriella subcapitata and Microcystis aeruginosa

The toxicity of cadmium and chromium to Pseudokirchneriella subcapitata and Microcystis aeruginosa was evaluated through algal growth rate during 96h exposure bioassays. Free metal ion concentrations were obtained using MINEQL+ 4.61 and used for IC50 determination. Metal accumulations by the microorganisms were determined and they were found to be dependent on the concentration of Cd2+ and Cr6+. IC50 for P. subcapitata were 0.60 µmol L-1 free Cd2+ and 20 µmol L-1 free Cr6+, while the IC50 values for M. aeruginosa were 0.01 µmol L-1 Cd2+ and 11.07 µmol L-1 Cr6+ . P. subcapitata accumulated higher metal concentrations (0.001 -0.05 µmol Cd mg-1 dry wt. and 0.001 -0.04 µmol Cr mg-1 dry wt) than the cyanobacteria (0.001 -0.01 µmol Cd mg-1 dry wt and 0.001 -0.02 µmol Cr mg-1 dry wt). Cadmium was more toxic than chromium to both the microorganisms.

Occupational Diseases in Workers Exposed to Organic Solvents / 한양의대학술지

Organic solvents are hydrocarbon-based substances that dissolve another substance. Organic solvents are usually lipid soluble, volatile and commonly used for painting, printing, degreasing, cleaning, thinning and extraction. Due to their volatility and lipid solubility, organic solvents are easily absorbed across the alveolar-capillary membrane and through the skin. Because organic solvents are lipophilic, they tend to be distributed to lipid-rich tissue, such as adipose tissue, nervous system and liver. Almost all organic solvent can induce skin diseases such as acute irritant dermatitis and chronic eczema. Some organic solvents are associated with allergic contact dermatitis. General and nonspecific central nervous system depression is another common toxic effect induced by most organic solvents. It shows symptoms which are the same as those from alcohol drinking, and those symptoms are completely resolved by removal from exposure to solvents. Long term and repeated exposures to organic solvents can also lead to chronic adverse neurobehavioral effects. These effects are also called as chronic toxic encephalopathy, chronic solvent intoxication and psycho-organic syndrome, and commonly reported symptoms of them are headache, depression, anxiety, and impairment of recent memory. Organic brain lesions can be found in workers suffering from psycho-organic syndrome, and in this case, there is a possibility of persistent disabilities. Carbon disulfide, n-hexane, and methyl n-butyl ketone are specifically toxic to the peripheral nervous system, and cause a symmetric ascending sensory and motor polyneuropathy. Halogenated hydrocarbons including carbon tetrachloride show toxic effects on the heart, liver, kidney, and blood. Toluene can sensitize the heart to arrhythmogenic effects of epinephrine, so sudden death in young and healthy people can be ensued from glue sniffing. Benzene is able to induce any type of leukemia, especially in victims with benzene-associated aplastic anemia. Exposure to some solvents during pregnancy has potential to induce congenital malformation and spontaneous abortion. In the treatment of diseases by organic solvents, the first step should be removal from exposure to the causative solvent.

Manifestaciones cutáneas como parámetro de teratogenicidad en la intoxicación con metales pesados / Cutaneous signs as parameter in teratogenicity by heavy metal intoxication

Se estudiaron los efectos teratogénicos de metales pesados (acetatos de Cd2+ y Pb2+ y sulfato de Cu2+), en embriones de pollo en desarrollo, después de la administración de una monodosis del metal. Los huevos embrionados fueron inyectados en la yema en el día 12 de incubación. Las concentraciones de los iones fueron (nmoles/g huevo): Cd2+: Dosis 1 (D1): 0,16 y Dosis 2 (D2): 0,32; Pb2+: D1: 8,0 y D2: 16,0 y Cu2+: D1: 1,7 y D2: 3,3. Los resultados se evaluaron después de continuar la incubación in ovo durante 12 y 60 hs Cu2+ y Pb2+ no aumentaron la mortalidad de los embriones, en cambio, la presencia de Cd2+ produjo entre 30 y 86 % de mortalidad de los embriones, con efectos dosis y tiempo dependientes. Los embriones intoxicados con la D2 de Cd2+ durante 60 hs fueron los únicos ejemplares que presentaron disminución en su peso promedio, respecto de los ejemplares de control. La administración de Cd2+ causó efectos teratogénicos más severos que los tratamientos con Cu2+ y Pb2+. Se puede concluir que los metales pesados son embriotóxicos e inducen teratogenia en embriones de pollo en desarrollo. Se sugiere que los mejores parámetros para evaluar la teratogenicidad producida por la intoxicación Cd2+, Cu2+ y Pb2+ son los derrames cutáneos y hepáticos.

Teratogenic effects of heavy metals (Cd2+- and Pb2+- acetates and Cu2+- suphate) were studied on chick embryos, after the administration as a single dose. Test materials were injected into the yolk on day 12 of incubation. Tested concentrations were (nmole/g egg): Cd2+ Dose 1 (D1): 0.16 and Dose 2 (D2): 0.32; Pb2+: D1: 8.0 and D2: 16.0 and Cu2+: D1: 1.7 and D2: 3.3. Evaluations were performed after in ovo incubation for 12 and 60 hours. Embryonic mortality did not increase at the two dose levels of Cu2+ and Pb2+, while Cd2+ caused 30 and 86% of mortality, showing dose and time responses. Eggs treated with D2 of Cd2+ for 60 hs, significantly decreased the average of body mass embryo, when compared to the control group. Cd2+ administration was responsible for the most severe teratogenic signs compared to Cu2+ and Pb2+ treatments. It can be concluded that heavy metals are embryotoxic and teratogenics. We suggest that cutaneous and liver hemorrhages are the best signs to evaluate teratogenicity induced by Cd2+, Cu2+ and Pb2+.

Research on TCM Syndrome of Lung Cancer Patients and the Intervention Effect of Shengxuetang Plays during Chemotherapy / 中国中医药信息杂志

Objective To observe the TCM syndrome changes of lung cancer patients before and after chemotherapy and the effect of Shengxuetang on dealing with side and toxic effects caused by chemotherapy and patient’s immune function. Method Phase III and IV lung cancer patients were randomly divided into two groups, treatment group and control group. Patients in the treatment group were given the combination of chemotherapy and Shengxuetang, while those in the control group were given the combination of chemotherapy and berbamine. Peripheral WBC count, HGB level, platelet count, T-cell count, and NK cell activity were measured, and other toxic effects were observed before and after chemotherapy. Results Before chemotherapy, there were two syndrome types, one is the deficiency of Qi and Yin, and the other is phlegm-damp due to deficiency of Qi accompanied with blood stasis. During the treatment, these two syndrome gradually transformed to the deficiency of both Qi and Yin and coagulation of phlegm and blood stasis. The chance for patients to develop myelosuppression had no difference between two groups, however, most patients in the treatment group developed grade I myelosuppression, while in the control group, most patients developed grade II myelosuppression. G-CSF was prescribed more in the control group than in the treatment group (P

Preliminary evaluation of biodegradable implant for intraocular sustained-release of cefuroxime in rabbits / 上海第二医科大学学报

Objective To evaluate the anti-infection effects of biodegradable implant for sustained release of cefuroxime,which can be implanted into the anterior chamber in rabbits. Methods The implants for sustained release of cefuroxime were prepared with appropriate mixtures of cefuroxime axetil(CAE),poly(lactic-glycolic) acid(PLGA) and polyvinyl pyrrolidone by solvent evaporation method.Fifty rabbits were selected and divided into experiment group(n=35) and control group(n=15).The concentrations of cefuroxime in aqueous humor 0.5,1,2,6 and 24 h after subconjunctival injection of 125 mg cefuroxime were measured in control group,and those in aqueous humor and plasma 1,2,3,5,7,14 and 28 d after implantation into anterior chamber were detected in experiment group.Besides,for experiment group,the intraocular pressure before and after the implantation were obtained;the inflammation of anterior chamber was routinely observed by slit lamp;and cornea tissues were harvested for scanning electron microscopy and light microscopy. ResultsThe concentration of cefuroxime in aqueous humor in control group reached the highest at 0.5 h after injection of cefuroxime(47 736.18 ng/mL),while that was extremely low 24 h later(10.92 ng/mL).The concentrations of cefuroxime in aqueous humor were higher than 500 ng/mL within 7 d after implantation,and that was very low at d28(59.20?39.05 ng/mL).And the plasma concentrations of cefuroxime had been at lower levels ever since the implantation(

Four Cases of Verapamil Deleterious Effects in Chronic Renal Failure / 대한신장학회잡지

Four hypertensive patients with chronic renal insufficiency who were treated with sustained release verapamil hydrochloride subsequently developed acute toxic effects. All four patients developed marked bradycardia, hypotension, hyperkalemia and metabolic aciodosis and were treated with atropine, fluid therapy, potasium lowing measure, dialysis, and temporary pacemaker, and were restored to the renal function and sinus rhythm after 12-24 hr. Patients with renal impairement who are treated with sustained release verapamil may accumulate verapamil or its metabolites and develop toxic side effects. We conclude that sustained release verapamil should be used with caution in chronic renal failure and that patients should be closely monitored for adverse cardiovascular, metaboic, and hepatic side effects.

Asesoría de riesgo laboral: identificación y prevención del riesgo ocupacional / Working risk counselling: identification and prevention of the occupational risk

Con el objetivo de desarrollar el servicio de salud ocupacional del Centro de Toxicología y Biomedicina de Santiago de Cuba, se elaboró un documento (asesoría de riesgo laboral) a partir de la identificación de los principales riesgos laborales y los efectos tóxicos que para la salud estos poseen a corto y a largo plazos, para lo cual se efectuó una búsqueda bibliográfica exhaustiva y una valoración cuantitativa de los riesgos físicos, así como cualitativa de los riesgos químicos, lo que permite establecer una posible asociación de dichos riesgos con el resultado del estudio de salud ocupacional de los trabajadores expuestos. En el presente trabajo se muestran los aspectos informativos de este documento, la metodología de trabajo y las fuentes de información consultadas.

In order to develop the occupational health service of theToxicology and Biomedicine Center of Santiago de Cuba, a document (working risk counselling) was made starting from the identification of the main working risks and their toxic effects for health on the short and long term. To this end, there were made an exhaustive bibliographic search, a quantitative assessment of the physical risks and a qualitative evaluation of the chemical risks that allowed to establish a possible association of these risks with the result of the occupational health study conducted among the exposed workers. The informative aspects of this document, the working methodology and the consulted information sources were shown in the present paper.

Citostáticos: medicamentos riesgosos / Cysatostatic drugs: risky drugs

Se hizo una revisión bibliográfica concerniente a los posibles riesgos ocupacionales que entraña la manipulación de medicamentos antineoplásicos. Se ha demostrado, en estudios clínicos, que estos medicamentos poseen efectos carcinogénicos, mutagénicos y teratogénicos. Por lo tanto, los trabajadores expuestos ocupacionalmente a estos compuestos pueden enfrentar graves peligros para su salud si no siguen una serie de normativas establecidas que regulan el adecuado manejo de estos medicamentos.

A bibliographic review concerning the possible occupational risks of the antineoplastic drugs handling was made. It has been proven in clinical studies that these drugs have carcinogenic, mutagenic and teratogenic effects. Therefore, those workers occupationally exposed to these compounds may face severe dangers for their health if they do not follow a series of measures established to regulate the adequate handling of these drugs.

Efeitos tóxicos de alfa e ß-asaronas e do óleo de cálamo em camundongos, embriões de galinha e mutagenicidade em Salmonella tryphimurium / Toxic effects of alpha and beta-asarone and of the calamus oil in mices, chick embryos and mutagenicity in Salmonella typhimurium

Foram verificadas as DL50 do óleo de cálamo de variedades diferentes, assim como os seus componentes ativos a e B3-asaronas em camundongos, por via intraperitoneal. A DL50 do óleo de cálamo, variedade indiana, foi de 154,5 mgv'kg, a da ,B-asarona, de 184,0 mg/kg e a da a-asarona, de 226,0 mgv'kg. Para variedade européia e para o extrato oleoso isento de asaro nas, em virtude de suas baixas toxicidades agudas, não foi possível a determinação dos valores de DL50. O estudo da toxicidade em embriões de galinha para verificar eventual atividade teratogênica foi feito também para os óleos de diferentes variedades, assim como os componentes a e B3-asaronas isolados. A mortalidade média variou de 10,0 a 100,0% e não se constataram sinais de malformação nos embriões desenvolvidos. O teste de Ames foi conduzido com o componente B3-asarona nas concentrações de 10, 50, 100, 200 e 500 ,ug/placa. A amostra não apresentou atividade mutagênica em nenhuma das concentrações, frente à cepa de Salmonella typhimurium, com e sem adição de ativador obtido de extrato de fígado de rato após índução com Aroclor 1254 (AU).