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INTRODUCTION: Disaster epidemiological studies indicate that Asia has the highest frequency of natural disasters. Rural communities are heavily impacted by natural disasters and have different healthcare needs to urban ones. Referencing Asian countries, this paper's objective is to provide an overview of health impacts and the current evidence for designing programmes and policies related to rural health emergency and disaster risk management (health-EDRM). SOURCES OF DATA: This paper uses published English-only reports and papers retrieved from PubMed, Google Scholar, Embase, Medline and PsycINFO on rural disaster and emergency responses and relief, health impact and disease patterns in Asia (January 2000-January 2018). AREAS OF AGREEMENT: Earthquakes are the most studied natural disasters in rural communities. The medical burden and health needs of rural communities were most commonly reported among populations of extreme age. Most of the existing research evidence for rural interventions was reported in China. There lacks published peer-reviewed reports of programme impacts on personal and community preparedness. AREAS OF CONTROVERSY: There is a lack of evidence-based health-EDRM interventions to evaluate implementation effectiveness in rural areas despite vast volumes of health-related disaster literature. GROWING POINTS: Climate change-related disasters are increasing in frequency and severity. Evidence is needed for disaster risk reduction interventions to address the health risks specific to rural populations. AREAS TIMELY FOR DEVELOPING RESEARCH: To support global policy development, urgent evidence is needed on the intervention effectiveness, long-term health outcomes, local and cultural relevance as well as sustainability of health relief produced by Health-EDRM programmes in rural areas.
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Planejamento em Desastres/organização & administração , Desastres Naturais , Gestão de Riscos/organização & administração , Serviços de Saúde Rural/organização & administração , Ásia , Terremotos , Medicina Baseada em Evidências/métodos , Humanos , Saúde MentalRESUMO
INTRODUCTION: Mushroom poisoning is a cause of major mortality and morbidity all over the world. Although Hong Kong people consume a lot of mushrooms, there are only a few clinical studies and reviews of local mushroom poisoning. This study aimed to review the clinical characteristics, source, and outcome of mushroom poisoning incidences in Hong Kong. METHODS: This descriptive case series review was conducted by the Hong Kong Poison Information Centre and involved all cases of mushroom poisoning reported to the Centre from 1 July 2005 to 30 June 2015. RESULTS: Overall, 67 cases of mushroom poisoning were reported. Of these, 60 (90%) cases presented with gastrointestinal symptoms of vomiting, diarrhoea, and abdominal pain. Gastrointestinal symptoms were early onset (<6 hours post-ingestion) and not severe in 53 patients and all recovered after symptomatic treatment and a short duration of hospital care. Gastrointestinal symptoms, however, were of late onset (≥6 hours post-ingestion) in seven patients; these were life-threatening cases of amatoxin poisoning. In all cases, the poisonous mushroom had been picked from the wild. Three cases were imported from other countries, and four collected and consumed the amatoxin-containing mushrooms in Hong Kong. Of the seven cases of amatoxin poisoning, six were critically ill, of whom one died and two required liver transplantation. There was one confirmed case of hallucinogenic mushroom poisoning caused by Tylopilus nigerrimus after consumption of a commercial mushroom product. A number of poisoning incidences involved the consumption of wild-harvested dried porcini purchased in the market. CONCLUSION: Most cases of mushroom poisoning in Hong Kong presented with gastrointestinal symptoms and followed a benign course. Life-threatening cases of amatoxin poisoning are occasionally seen. Doctors should consider this diagnosis in patients who present with gastrointestinal symptoms that begin 6 hours or more after mushroom consumption.
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Amanitinas/intoxicação , Gastroenteropatias/etiologia , Intoxicação Alimentar por Cogumelos/epidemiologia , Dor Abdominal/epidemiologia , Dor Abdominal/etiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Diarreia/epidemiologia , Diarreia/etiologia , Feminino , Gastroenteropatias/epidemiologia , Hong Kong/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Vômito/epidemiologia , Vômito/etiologia , Adulto JovemRESUMO
BACKGROUNDS: Diabetes mellitus (DM) is a common endocrine disorder and an increasing epidemic worldwide. Proportional diabetic patients eventually develop cutaneous diseases. OBJECTIVES: This study determined the statistical association of cutaneous manifestations and DM as well as the DM-associated cutaneous manifestations in elderly male residents. METHODS: A cross-sectional study was conducted in a Veterans Home in Taiwan. The cutaneous manifestations and major systemic diseases of the residents were recorded separately. Univariate logistic regression and multivariate analysis after adjustment for age, body mass index and significant major systemic diseases provided odds ratios and P values for the statistical association. RESULTS: A total of 313 male residents (age ≥65 years) were recruited, including 70 (22.4%) with DM. Their most common cutaneous manifestations included fungal infection (77%) and brown spots on the legs (38.3%). Chronic ulcers adjusted odds ratios (AOR 4.90, 95%CI: 1.82-13.19; P = 0.002), brown spots on the legs (AOR 6.82, 95%CI: 3.60-12.89; P < 0.001) and pruritus (AOR 12.86, 95%CI: 4.40-37.59; P < 0.001) were significantly associated with DM. The diabetic residents were inclined to have chronic ulcers, brown spots on the legs and pruritus at a 7.46-fold higher risk (AOR 7.46, 95%CI: 3.86-14.43; P < 0.001). The diabetic residents exhibited marginally higher risks of bacterial infection, scabies, or skin tags. CONCLUSION: The DM-associated cutaneous manifestations were chronic ulcers, brown spots on the legs, and pruritus. By observing clues of diabetic cutaneous features, a more complete condition of diabetic patients can be appreciated. The information is essential for providing appropriate treatment and key nursing points regarding the diabetes-associated skin diseases.
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Complicações do Diabetes/epidemiologia , Dermatopatias/epidemiologia , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Instituição de Longa Permanência para Idosos , Humanos , Masculino , Prevalência , TaiwanRESUMO
BACKGROUND: Recent researches show that psoriasis is frequently associated with systemic co-morbidities. OBJECTIVES: This study aimed to identify possible associated co-morbidities in psoriatic patients stratified by age and sex. METHODS: In this retrospective hospital-based case-control study, patients diagnosed as psoriasis at the Kaohsiung Veterans General Hospital in Taiwan between January 2008 and December 2009 were enrolled as cases and classified into severe and mild based on their use of systemic therapy. The controls were the patients without psoriasis matched the cases in 1 : 1 ratio with same birth year, sex and calendar date. Odds ratios (ORs) and 95% confidence intervals (CIs) from the conditional logistic regression method were used to assess the risk of co-morbidities between psoriatic and non-psoriatic patients. RESULTS: A total of 447 cases and 447 matched controls, with mean age of 51.3 ± 18.3 years and male-to-female ratio of 2.17 : 1 were enrolled. The ratio of mild-to-severe was 3.5 : 1. Compared with non-psoriatic patients, psoriatic patients had significantly higher OR of hypertension (1.85), diabetes mellitus (2.88) and obesity (1.66). Among those aged ≥51 years old, there was significant risk in male psoriatic patients with ischaemic and hypertensive heart disease (IHHD) (OR = 2.167) after eliminating female IHHD psoriatic patients (OR = 0.125). Psoriasis was significantly negatively associated with cancers (OR = 0.267). Psoriasis patients often had the usual drinking habit (OR = 2.23) and seldom had an occasional drinking habit (OR = 0.25). CONCLUSIONS: Psoriasis is strongly associated with hypertension, diabetes mellitus and obesity. The association between psoriasis and IHHD, stroke, cancers, smoking and alcohol habits warrant more investigation.
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Psoríase/complicações , Adulto , Idoso , Estudos de Casos e Controles , Comorbidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , TaiwanRESUMO
BACKGROUND: To examine the association of microalbuminuria (MAU) with the carotid intima-media thickness (CIMT) in Chinese Type 2 diabetic subjects. MATERIALS AND METHODS: Two hundred and thirty-nine patients (64±13 yr, 154 males) were divided into 2 groups: one with MAU (no.=119) or one without (no.=120). We recorded clinical and biochemical data as well as CIMT and ankle-brachial index (ABI). RESULTS: The patients with MAU had had diabetes mellitus (DM) longer, had higher blood pressure (BP). They also had lower estimated glomerular filtration rate (eGFR) and higher levels of circulating glucose, glycated hemoglobin, high sensitivity C-reactive protein than those without. Lower mean ABI was found in those with MAU, however, they did not have higher mean CIMT (0.72±0.15 vs 0.71±0.16 mm, p=0.525). In patients without MAU, CIMT correlated with age, DM duration, systolic BP, eGFR, albumin- to-creatinine ratio, and ABI. However, in those with MAU, CIMT correlated only with age and eGFR. Multivariate regression analysis revealed that mean CIMT correlated only with age for patients without MAU, but correlated with age and body mass index for those with MAU. Dividing the patients into 5 age groups, we found that the older the patient, the higher the mean CIMT with no group differences between those with and without MAU in both genders. However, patients with eGFR below 60 ml/min/1.73 m(2) had higher mean CIMT than those above (0.75±0.16 vs 0.69±0.14 mm, p=0.005). CONCLUSIONS: Type 2 diabetic patients with MAU were not associated with higher CIMT. Conversely, those with deterioration of renal function were more likely associated.
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Albuminúria/etnologia , Povo Asiático/estatística & dados numéricos , Doenças das Artérias Carótidas/etnologia , Espessura Intima-Media Carotídea/estatística & dados numéricos , Diabetes Mellitus Tipo 2/etnologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Índice Tornozelo-Braço/estatística & dados numéricos , Pressão Sanguínea , Doenças das Artérias Carótidas/diagnóstico por imagem , Feminino , Taxa de Filtração Glomerular , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Fatores de Risco , Taiwan/epidemiologiaRESUMO
Possible masking of tuberculosis (TB) in treatment of community-acquired respiratory infection by newer fluoroquinolones has not been examined in randomised controlled trials. We undertook a randomised, open-label controlled trial involving adults with community-acquired pneumonia or infective exacerbation of bronchiectasis encountered in government chest clinics in Hong Kong. 427 participants were assigned by random permutated blocks of 20 to receive either amoxicillin clavulanate (n = 212) or moxifloxacin (n = 215). Participants were followed for 1 yr for active pulmonary TB. Excluding three participants with positive baseline culture, 13 developed active pulmonary TB: 10 (4.8%) out of 210 were given amoxicillin clavulanate, and three (1.4%) out of 214 were given moxifloxacin. The difference was significant by both proportion and time-to-event analysis. Post hoc analysis showed a significant decrease in the proportion with active pulmonary TB from 4.8% to 2.4% and 0% among participants given amoxicillin clavulanate (n = 210), moxifloxacin for predominantly 5 days (n = 127) and 10 days (n = 87), respectively. The log rank test for trend also showed a significant difference between the three subgroups. Regression models reaffirmed the linear effect; the adjusted odds ratio (95% confidence interval) of active pulmonary TB after moxifloxacin exposure up to predominantly 10 days was 0.3 (0.1-0.9). Newer fluoroquinolones appear to mask active pulmonary TB.
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Antibacterianos/efeitos adversos , Bronquiectasia/microbiologia , Diagnóstico Tardio , Fluoroquinolonas/efeitos adversos , Pneumonia Bacteriana/tratamento farmacológico , Tuberculose Pulmonar/diagnóstico , Idoso , Antibacterianos/administração & dosagem , Bronquiectasia/diagnóstico por imagem , Infecções Comunitárias Adquiridas/diagnóstico por imagem , Infecções Comunitárias Adquiridas/tratamento farmacológico , Relação Dose-Resposta a Droga , Feminino , Fluoroquinolonas/administração & dosagem , Humanos , Análise de Intenção de Tratamento , Masculino , Pessoa de Meia-Idade , Mycobacterium tuberculosis/isolamento & purificação , Pneumonia Bacteriana/diagnóstico por imagem , Estudos Prospectivos , Radiografia , Escarro/microbiologiaRESUMO
BACKGROUND: In addition to lipid lowering, further pleotropic effects of statins have been postulated. We aimed to study if the various pleotropic effects are due indirectly to the modulation of adipocytokines. MATERIALS AND METHODS: We studied the effect of atorvastatin on insulin sensitivity and the plasma adiponectin and leptin concentrations. Our randomized open labeled study had 29 hyperlipidemic Type 2 diabetic patients (14 females, 15 males, mean age 60.0+/-2.2 yr). They were randomized into three 12-week atorvastatin intervention types. Each day patients were given either 10 mg (no.=10), 20 mg (no.=10) or 40 mg (no.=9). Evaluations were performed before and after intervention. RESULTS: All baseline characteristics were statistically identical in the 3 groups. Drop in total cholesterol, LDL-cholesterol, and triglyceride levels were measured at the end. With 10 mg the drop was 30%, 37%, and 30%. The 20 mg group was 43%, 54%, and 34%. The 40 mg group was 42%, 51%, and 27%. Groups had no significant change of body mass index, HDLcholesterol, and glycated hemoglobin levels. Also, levels of insulin, adiponectin, leptin, homeostasis model assessment index (HOMA) and Quantitative Insulin Sensitivity Check Index (QUICKI) stayed the same. Pooled parameters of all 29 patients showed no difference in levels of insulin, adiponectin, leptin, HOMA, and QUICKI before and after treatment. CONCLUSIONS: Atorvstatin does not affect insulin sensitivity and the adiponectin or leptin levels in hyperlipidemic Type 2 diabetes.
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Adiponectina/sangue , Diabetes Mellitus Tipo 2/tratamento farmacológico , Ácidos Heptanoicos/farmacologia , Ácidos Heptanoicos/uso terapêutico , Hiperlipidemias/tratamento farmacológico , Resistência à Insulina , Leptina/sangue , Pirróis/farmacologia , Pirróis/uso terapêutico , Idoso , Anticolesterolemiantes/farmacologia , Anticolesterolemiantes/uso terapêutico , Atorvastatina , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/complicações , Relação Dose-Resposta a Droga , Feminino , Hemoglobinas Glicadas/análise , Ácidos Heptanoicos/administração & dosagem , Humanos , Hiperlipidemias/sangue , Hiperlipidemias/complicações , Masculino , Pessoa de Meia-Idade , Pirróis/administração & dosagemRESUMO
Numerous, ongoing outbreaks in Brazilian swine herds have been characterized by vesicular lesions in sows and acute losses of neonatal piglets. The complete genome of Seneca Valley virus (SVV) was identified in vesicular fluid and sera of sows, providing evidence of association between SVV and vesicular disease and viraemia in affected animals.
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Surtos de Doenças/veterinária , Genoma Viral , Infecções por Picornaviridae/veterinária , Picornaviridae/genética , Doenças dos Suínos/virologia , Animais , Brasil/epidemiologia , Feminino , Dados de Sequência Molecular , Filogenia , Picornaviridae/classificação , Infecções por Picornaviridae/genética , RNA Viral/análise , Análise de Sequência de DNA , Suínos , Doenças dos Suínos/epidemiologiaRESUMO
The presence of immunoreactive (IR) endothelin, endothelin mRNA, and endothelin receptors in human brain and pituitary gland has been studied by RIA, Northern blot hybridization, and receptor assay. IR endothelin was detected in all five brain regions examined (cerebral cortex, cerebellum, brain stem, basal ganglia, and hypothalamus) (6-10 fmol/g wet wt) and spinal cord (22 +/- 6 fmol/g wet wt, n = 7, mean +/- SEM). Higher concentrations of IR endothelin were found in the pituitary gland (147 +/- 30 fmol/g wet wt). Fast protein liquid chromatographic analysis of the IR endothelin in pituitary gland showed a large IR peak in the position of endothelin-3 and a smaller peak in the position of endothelin-1, whereas IR endothelin in the hypothalamus and brain stem was mainly endothelin-1. Endothelin messenger RNA was detected by Northern blot hybridization in the pituitary but not in hypothalamus. The receptor assay showed that 125I-endothelin-1 binding sites were present in large numbers in all five brain regions but were much less abundant in the pituitary gland. Binding capacity and dissociation constant were 5052 +/- 740 fmol/mg protein and 0.045 +/- 0.007 nM in brain stem and 963 +/- 181 fmol/mg protein and 0.034 +/- 0.009 nM in hypothalamus. In the pituitary gland, there were two classes of binding sites for endothelin with dissociation constants of 0.059 +/- 0.002 nM (binding capacity = 418 +/- 63 fmol/mg protein) and 0.652 +/- 0.103 nM (binding capacity = 1717 +/- 200 fmol/mg protein). Endothelin-1, -2 and -3 were almost equipotent in displacing the binding (IC50 approximately 0.04 nM). These findings are in accord with the possibility that endothelin acts as a neurotransmitter, neuromodulator or neurohormone in man.
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Química Encefálica , Encéfalo/ultraestrutura , Endotelinas/análise , Endotelinas/imunologia , Hipófise/química , RNA Mensageiro/análise , Receptores de Superfície Celular/análise , Idoso , Idoso de 80 Anos ou mais , Northern Blotting , Endotelinas/genética , Feminino , Humanos , Radioisótopos do Iodo , Masculino , Pessoa de Meia-Idade , Hipófise/ultraestrutura , Receptores de EndotelinaRESUMO
Endothelin-like immunoreactivity was detected in human milk at a concentration of 6.8 +/- 1.6 pmol/l (mean +/- SEM; n = 16) using a highly sensitive radioimmunoassay. Gel filtration and fast protein liquid chromatography (FPLC) verified the identity of the endothelin. FPLC revealed 4 peaks, one eluting just after the void volume, and the other three in the positions of endothelin-1, -2, and -3, respectively.
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Leite Humano/análise , Peptídeos/análise , Cromatografia em Gel , Cromatografia Líquida de Alta Pressão , Endotelinas , Endotélio Vascular , Feminino , Humanos , Radioimunoensaio , Valores de ReferênciaRESUMO
The authors describe a patient with primary Sjögren's syndrome who developed pachymeningitis, hypopituitarism, and central diabetes insipidus. The patient improved with corticosteroid pulse therapy.
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Hipopituitarismo/diagnóstico , Linfocitose/diagnóstico , Meningite/diagnóstico , Síndrome de Sjogren/diagnóstico , Idoso , Humanos , Hipertrofia , Hipopituitarismo/complicações , Linfocitose/complicações , Imageamento por Ressonância Magnética , Masculino , Meningite/complicações , Síndrome de Sjogren/complicaçõesRESUMO
The factors associated with high concentrations of circulating plasma immunoreactive endothelin in patients with diabetes mellitus are unknown. Plasma and tissue (lung and kidney) immunoreactive endothelin levels were therefore measured by radioimmunoassay in three animal models of diabetes mellitus: dexamethasone-treated rats (2 mg/kg per day for 12 days), streptozotocin-treated rats (100 mg/kg, 4 days before being killed) and rats treated with both dexamethasone and streptozotocin. Plasma concentrations of immunoreactive endothelin in the dexamethasone-treated rats (3.13 +/- 0.28 pmol/l, mean +/- S.E.M., n = 15) were significantly (P less than 0.005) higher than those in controls (1.33 +/- 0.18 pmol/l, n = 15), while plasma concentrations of immunoreactive endothelin in streptozotocin-treated rats (n = 8) and rats treated with both dexamethasone and streptozotocin (n = 14) were undetectable (less than 0.5 pmol/l). Fast protein liquid chromatographic analysis of the plasma immunoreactive endothelin of dexamethasone-treated rats showed four peaks: one in the void volume, one eluting before endothelin-3, one eluting after endothelin-3 and before endothelin-1 and one eluting in a position identical with that of endothelin-1. Pulmonary concentrations of immunoreactive endothelin in the three groups of rats with diabetes mellitus were lower (P less than 0.005) but no significant change was found in renal immunoreactive endothelin. These findings indicate that short-term dexamethasone treatment increases plasma levels of immunoreactive endothelin while streptozotocin treatment decreases them. Thus, multiple factors may influence plasma concentrations of immunoreactive endothelin in diabetes mellitus.
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Diabetes Mellitus Experimental/metabolismo , Endotelinas/análise , Animais , Dexametasona , Diabetes Mellitus Experimental/induzido quimicamente , Endotelinas/sangue , Endotelinas/imunologia , Rim/química , Pulmão/química , Masculino , Radioimunoensaio , Ratos , Ratos Endogâmicos , EstreptozocinaRESUMO
A simple and objective assay was developed for the detection and quantitation of fetal-maternal hemorrhage with the use of flow cytometry. In vitro prepared control mixtures of 10%, 2%, 1%, 0.5%, 0.25%, 0.125%, and 0.06% D+ RBCs in D- RBCs were tested (8-11) different times by flow cytometry and gave mean % D+ results of 11.10%, 1.90%, 0.92%, 0.45%, 0.24%, 0.11%, and 0.05%. The coefficient of variation of preparing and testing these mixtures ranged from 11.0 to 15.9% for the 10-0.125% mixtures. Thus, flow cytometry was accurate, reproducible, and sensitive. Flow cytometry was compared with Du tests, rosette tests, and acid elution. The Du test was highly variable because it was not sensitive enough to detect a significant bleed (approximately 0.6%) in some cases and too sensitive (necessitating quantitation of an insignificant bleed) in others. The rosette test was too sensitive. Acid elution and flow cytometry results did not always agree; acid elution results were approximately twice as high as flow cytometry. The authors believe flow cytometric detection of D+ red blood cells to be more accurate than the detection of fetal hemoglobin by acid elution techniques, which is known to have poor reproducibility. Postpartum samples from 56 D- women who delivered D+ babies were tested. Fifty-two had fetal bleeds less than 0.3% by acid elution and flow cytometry; all had negative Du test results, but there were two false positive results with the use of the rosette technique. Four had significant bleeds (greater than or equal to 0.6%); in all four cases the flow cytometry results were lower than the acid elution results. The authors were able to quantitate a bleed of fetal RBCs, which were D+ only by the Du test, in a D- mother with the use of flow cytometry, and D+ RBCs in a mother whose RBCs were of the rare DVI mosaic phenotype. This would not have been possible with the use of the standard Du or rosette techniques.
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Transfusão Feto-Materna/diagnóstico , Citometria de Fluxo/métodos , Contagem de Eritrócitos , Feminino , Sangue Fetal , Humanos , Período Pós-Parto , Gravidez , Sistema do Grupo Sanguíneo Rh-Hr , Sensibilidade e EspecificidadeRESUMO
The presence of immunoreactive endothelin (IR-ET) in human saliva and rat parotid gland was investigated by radioimmunoassay. The IR-ET concentration (mean +/- SEM) in saliva taken from normal volunteers was 2.0 +/- 0.2 pmol/l (n = 15). The IR-ET concentration in rat parotid gland was 19.2 +/- 2.2 fmol/g wet weight (n = 10). Fast protein liquid chromatography (FPLC) of human saliva extract revealed 6 peaks; one peak eluting in the void volume, one in a position between ET-1 and -3, and the other four in the positions of synthetic ET-1, -2, -3 and big ET(1-38), respectively. A similar pattern of rat parotid gland extract was noted with FPLC, except that there was no peak after the void volume. Presence of endothelin, a potent growth factor, in saliva and salivary gland points to a role in maintaining the integrity of the oral and gastrointestinal tract mucosa.
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Endotelinas/metabolismo , Glândula Parótida/química , Saliva/química , Animais , Cromatografia em Gel , Feminino , Humanos , Masculino , Ratos , Ratos EndogâmicosRESUMO
Endothelin-1 (ET-1) is a 21-residue peptide isolated from the conditioned medium of cultured porcine endothelial cells and is widely distributed throughout the body, with relatively high levels in the kidney and lung. Animal studies have revealed that the lung appears to have the largest capacity for ET-1 removal from the blood stream. In this study we have examined the possible influence of thyroid status on immunoreactive endothelin (IR-ET) levels in the plasma and lung of the male rats. 3 weeks after the surgical removal of the thyroid gland from male rats, the IR-ET levels in the lung were reduced by 39%. Similarly, IR-ET levels were decreased 46% in the lung of rats rendered hypothyroid by treatment with 0.1% (w/w) PTU in the drinking water for 30 days, and replacement with daily L-thyroxine (T4) injections (5 micrograms/100 g) prevented this decrease. However, thyrotoxicosis induced by daily L-T4 injections (10 micrograms/100 g) also caused a decrease of the lung IR-ET levels by 49%. Nevertheless, the plasma IR-ET levels are similar in each group. Fast protein liquid chromatography study verified the presence of ET-1 immunoreactivity in both rat plasma and lung tissue extracts. This study demonstrates that euthyroid status is required for the maintenance of physiological concentrations of IR-ET in the lung of male rats.
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Endotelinas/metabolismo , Pulmão/metabolismo , Hormônios Tireóideos/fisiologia , Animais , Cromatografia Líquida , Endotelinas/sangue , Endotelinas/efeitos dos fármacos , Masculino , Propiltiouracila/farmacologia , Radioimunoensaio , Ratos , Ratos Wistar , Tireoidectomia , Tiroxina/farmacologiaRESUMO
Endothelin release from bovine endothelial cells of the aorta, pulmonary artery, and retinal microvessels was measured in response to various cytokines. Transforming growth factor beta (0.05-5 ng/ml) was found to be a potent stimulator (3-4 fold increase) of endothelin secretion in all three cell types. Tumour necrosis factor alpha (0.1-10 ng/ml) and interferon gamma (8-800 U/ml) had a small (1.5-2 fold increase) but significant effect on endothelin secretion from endothelial cells of large vessels but not the retinal microvessels. Interleukin-1 beta, Interleukin-6 and interleukin-8 at various doses did not affect endothelin secretion. These effects were observed at various time points from 6-24 hrs and indicate that of the cytokines tested, only transforming growth factor beta has a potent effect on endothelin release from endothelial cells of different organs.
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Endotelinas/metabolismo , Endotélio Vascular/metabolismo , Aorta/citologia , Meios de Cultura , Relação Dose-Resposta a Droga , Técnicas In Vitro , Interferon gama/farmacologia , Interleucinas/farmacologia , Artéria Pulmonar/citologia , Vasos Retinianos/citologia , Taxa Secretória/efeitos dos fármacos , Fator de Crescimento Transformador beta/farmacologia , Fator de Necrose Tumoral alfa/farmacologiaRESUMO
OBJECTIVES: To compare the long-term recurrence rate of the standard technique (simple sinectomy) and the supra-auricular approach (wide local excision) for the surgical management of preauricular sinuses. STUDY DESIGN: Retrospective cohort. METHODS: Fifty-four patients with a preauricular sinus excised between May 1986 and December 1996 were included in this study. All patients were categorized into one of two groups based on the type of surgery performed: the standard technique or the supra-auricular approach. The medical records were then reviewed and the latest information concerning the recurrence of a preauricular sinus were updated by phone interview. The recurrence rate of these two groups was statistically analyzed by the Fisher exact test. RESULTS: Forty-nine of 54 patients were successfully contacted with data updated and analyzed. The 32% recurrence rate of the standard excision (n = 25) was significantly higher than the 3.7% recurrence rate of the supraauricular approach (n = 27; two-tailed test, P = .01). CONCLUSION: The supra-auricular approach for excision of a preauricular sinus has a statistically lower recurrence rate in comparison to the standard technique.
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Abscesso/cirurgia , Orelha Externa/anormalidades , Adolescente , Adulto , Criança , Pré-Escolar , Orelha Externa/cirurgia , Feminino , Seguimentos , Humanos , Masculino , Recidiva , ReoperaçãoRESUMO
OBJECTIVE: To evaluate the clinical presentation and management of internal carotid artery rupture after irradiation and osteoradionecrosis of the skull base. STUDY DESIGN AND SETTING: A retrospective review of the patients in an otorhinolaryngology-head and neck secondary and tertiary referral center. METHODOLOGY: From January 1993 to December 1996, patients with hemorrhage from internal carotid artery as a complication of irradiation and osteoradionecrosis of skull base were reviewed and analyzed. RESULTS: Four patients with internal carotid arterial rupture were included in this study. Angiography was performed in all cases. Embolization of the aneurysm was performed on 2 patients and the remaining 2 patients underwent occlusion of their internal carotid arteries. Three of the 4 patients did not survive. The fourth is currently alive and well 18 months after embolization of 1 internal carotid artery. CONCLUSION: Skull base osteoradionecrosis with bleeding from internal carotid artery is a potentially fatal complication of irradiation. Angiography was the mainstay of diagnosis with embolization of the aneurysm and embolization or ligation of the internal carotid artery being the management options. Internal carotid artery occlusion is the definitive treatment provided cross circulation is adequate. SIGNIFICANCE: The advantages and disadvantages of the treatment options are discussed and a management protocol is proposed.
Assuntos
Falso Aneurisma/etiologia , Doenças das Artérias Carótidas/etiologia , Artéria Carótida Interna , Hemorragia/etiologia , Neoplasias Nasofaríngeas/radioterapia , Osteorradionecrose/etiologia , Radioterapia/efeitos adversos , Idoso , Falso Aneurisma/terapia , Doenças das Artérias Carótidas/terapia , Hemorragia/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Osteorradionecrose/complicações , Ruptura Espontânea , Base do CrânioRESUMO
Synthetic cyclic somatostatin-14 (SRIF-14) was conjugated with carbodiimide onto hemocyanin to immunize rabbits, and anti-sera with high titers (1:5,000-100,000) and good sensitivity and specificity were obtained. 125I-Tyr1-SRIF was made and purified on CM-52 cation exchange column. The immunoreactive specific activity (SP.AC.) of the tracer was around 1013 mCi/mg, which was much higher than the commercial products and other reports. The sensitivity of the assay was around 16 pg/ml, and the detectable range 20-2000 pg/ml. Human plasma was freshly prepared in the presence of aprotinin. Rat hypothalamus was homogenized and extracted with HC1 followed by heating at 95 degrees C then centrifuged, and the supernatant assayed. The standard curves of the acetate buffer (ph 5.2), plasma doses, plasma recovery doses, hypothalamic extract doses, and hypothalamic extract recovery doses were all in good parallelism with each other. The recovery of SRIF from human plasma and from rat hypothalamus were 98.8 +/- 6.3% and 86.9 +/- 6.8%, respectively. The specificity of the antisera were very high, and they only cross-react with H2-SRIF and Tyr1-SRIF at 15% and 170%, respectively, of the immunoreactivity to cyclic SRIF-14. The Scatchard plot of the binding data showed a straight line with a Kd of 3.52 X 10(-12)M and binding capacity of 4.06 X 10(-10)M. The intra- and inter-assay coefficient of variation were 4.5% and 12%, respectively. When the synthetic cyclic SRIF (Stilamin) was infused intravenously into normal volunteers, there were reproducible plasma time-dose curves of SRIF-LI (SRIF Like Immunoreactivity), which revealed its plasma half life around 1.5 minutes, and metabolic clearance rate about 50 ml/kg/min.
Assuntos
Hipotálamo/análise , Somatostatina/análise , Animais , Humanos , Cinética , Radioimunoensaio , Ratos , Ratos Endogâmicos , Somatostatina/sangue , Somatostatina/imunologiaRESUMO
This review was carried out to assess the effectiveness of our protocol designed for the management of ingested foreign bodies. It was a retrospective review of 5240 patients with ingested foreign bodies admitted over a five-year period to the Ear Nose and Throat Unit. These patients were managed according to a standardized protocol which was adopted and modified from our previous study. Under his management protocol, the mean hospital stay was 1.6 days. Flexible oesophagoscopy under local anaesthesia, and rigid oesophagoscopy under general anaesthesia, were performed in 1.5 per cent and 7.7 per cent of cases respectively. Major complications including oesophageal perforation and deep neck abscesses occurred in 0.19 per cent of patients. There was no mortality. This management protocol for ingested foreign bodies was both safe and cost-effective when compared to similar studies reported in the literature.