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OBJECTIVE: The aim of this study was to investigate the efficacy and safety of bronchoalveolar lavage (BAL) in the treatment of neonatal severe pneumonia (NSP). METHODS: One hundred patients with severe pneumonia were randomly divided into two groups, the BAL and control groups, with 50 patients in each group. In the BAL group, normal saline was instilled into the endotracheal tube for BAL. Before and after lavage, lung ultrasound (LUS) monitoring was performed to observe the lung pathological changes. Conventional treatment was administered in the control group. The need for and duration of invasive mechanical ventilation, the complication rate, the duration and cost of hospitalization and the mortality rate were compared between the two groups. RESULTS: The results of this study showed that there were 35 (70%) patients who meet the indications of the invasive mechanical ventilation (IMV) at admission in the BAL group, while there were only 15 (30%) patients still requiring IMV after BAL therapy. The duration of IMV was 41.7 ± 7.5 vs. 97.7 ± 12.9 h in BAL and controls, the incidence rate of complications was 8.0% vs. 20.0% in both groups, the length of hospital stay was 9.2 ± 1.9 vs. 14.1 ± 2.1 days in both groups, and the expense of hospital cost was 12 557 ± 832 vs. 19 121 ± 929 Chinese Yuan in both groups. All patients had stable vital signs during lavage, and no significant adverse side effects were observed. CONCLUSION: BAL was significantly beneficial for NSP with no significant adverse side effects; LUS is a useful tool for the timely detection of BAL effects.
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Lavado Broncoalveolar/efectos adversos , Pulmón/diagnóstico por imagen , Neumonía/terapia , Líquido del Lavado Bronquioalveolar , Estudios de Casos y Controles , Femenino , Humanos , Recién Nacido , Masculino , Estudios Prospectivos , Respiración Artificial , Resultado del Tratamiento , UltrasonografíaRESUMEN
Sensorineural deafness is the most common disorders of senses,which severely impact the life quality and bring heavy burden to the family as well as the society.Current state-of-art treatments focus on sound amplification and implanted electrodes that stimulate the auditory nerve.These strategies offer partial recovery of function for a limited patient population but do not come close to restoring natural hearing.Clearly,there is strong need for development of biological treatments for the hearing restoration through correcting the genetic defects or regenerating the new hair cells on the damaged cochlear sensory epithelium.We reviewed the advances in the biological restoration of the hearing,including the gene therapy and the hair cell regeneration aspects.
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<p><b>OBJECTIVE</b>To determine the gene location of two Gitelman syndrome (GS) family SLC12A3 genes and explore treatments using Chinese medicine (CM) prescriptions.</p><p><b>METHODS</b>In order to locate the two GS mutations, samples were collected from 11 people from two different pedigrees for direct genetic sequencing and comparison of the 26 exons of SLC12A3. Furthermore, the change of serum potassium was monitored throughout the therapy and those two probands undertook a sequential superposition of Western medicine (including potassium, Panangin and potassium-sparing diuretics) with CM prescription based on Buyang Huanwu Decoction () and Sijunzi Decoction (). The treatment included three stages, oral potassium chloride for the first 2 weeks (stage 1), potassium-sparing diuretic and Panangin with potassium chloride for the next 2 weeks (stage 2), CM along with the medicine in stage 2 for the final 2 weeks (stage 3).</p><p><b>RESULTS</b>The three mutations occurring in proband 1 from pedigree I were Thr60Met, 965-1_976del13ins12 (small indels mutation) and Ala122Ala (homozygous silent mutation). Likewise, three mutations, Asn359Lys, Thr382Met and Arg913Gln, appeared in the proband 2 from pedigree II. The serum potassium levels increasing from baseline to sequential stages were 1.63 mmol/L (baseline), 2.5 mmol/L (stage 1), 3.1 mmol/L (stage 2) and 3.9 mmol/L (stage 3) in the proband 1, and 2.8 mmol/L (baseline), 3.1 mmol/L (stage 1), 3.5 mmol/L (stage 2) and 4.3 mmol/L (stage 3) in the proband 2, respectively. The symptoms (numbness of limbs, weakness, palpitations, etc.) of both probands were all alleviated.</p><p><b>CONCLUSIONS</b>The mutations of both GS pedigrees can be defined as compound heterozygous mutations, most of which are known as missense mutations. Applying CM could be an appropriate choice for future intervention of GS.</p>
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DNA methylation is closely related to the genesis and development of pituitary adenoma. Studies have shown that high methylation in the promoter region of potassium voltage-gated chanel,shaker related subfamily,beta member 2,O-6-methylguanine-DNA methyltransferase,echinoderm microtubule associated protein like 2 ,ras homolog family member D ,homeobox B1 ,NNAT, and P16 inhibits the expression of these genes and regulates of the proliferation of pituitary adenoma. DNA methylation is also closely related to invasive pituitary adenoma. Therefore,further study on molecular mechanism of DNA methylation of pituitary adenoma will offer a new strategy for the diagnosis and treatment of pituitary adenoma.
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Humanos , Adenoma , Genética , Metilación de ADN , Regulación Neoplásica de la Expresión Génica , Neoplasias Hipofisarias , Genética , Regiones Promotoras GenéticasRESUMEN
Estrogen receptors (ERs) are members of nuclear receptors and related to several diseases such as cancer, inflammation and osteoporosis. ERs have two forms, ERα and ERβ, which have different functions and organism distributions. Compounds selectively targeting ERβ can regulate important physiological functions and avoid the side effects caused by targeting ERα. Therefore, selective ERβ ligands have received considerable research interest in recent years. In this article, different kinds of selective ERβ ligands were summarized and their structure-activity relationships were also analyzed.
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Humanos , Receptor beta de Estrógeno , Química , Ligandos , Relación Estructura-ActividadRESUMEN
<p><b>OBJECTIVE</b>To explore the effect of Chinese drugs for Pi strengthening Shen benefiting (CDPSSB) on the immunity function of HIV/AIDS patients' specific T cells.</p><p><b>METHODS</b>Totally 20 patients were randomly recruited from the treated group [treated by CDPSSB combined highly active anti-retroviral therapy (HAART)] and 23 patients were randomly recruited from the control group (treated by HAART alone). All patients were follow-up infected persons form You'an Hospital between from June 2010 to June 2012. CD4+ T absolute counts and HIV viral load were detected. Meanwhile, HIV whole gene overlapping peptides were used as stimulating antigen. The response intensity of HIV specific T cells was detected in the two groups.</p><p><b>RESULTS</b>There was no statistical difference in CD4 T absolute counts or HIV viral load between the two groups (P > 0.05). The response intensity of HIV specific T cells was significantly enhanced in the treated group, when compared with the control group (P < 0.05). Along with elongation of treatment time (6, 12, 18, and 24 months) in the treated group, the response intensity of HIV specific T cells showed enhancing tendency, but there was no statistical difference among these time points (P > 0.05).</p><p><b>CONCLUSION</b>CDPSSB could enhance improve the immunity function of HIV specific T cells, which might be one of its mechanisms.</p>
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Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Terapia Antirretroviral Altamente Activa , Recuento de Linfocito CD4 , Medicamentos Herbarios Chinos , Farmacología , Infecciones por VIH , Quimioterapia , Alergia e Inmunología , Linfocitos T , Alergia e Inmunología , Carga ViralRESUMEN
<p><b>OBJECTIVE</b>To characterize the human primary cyclins (D1, E, A, B1) expressed in gastric carcinoma, and to clarify the relationship between the types of expressed primary cyclins and clinicopathological features of gastric carcinoma.</p><p><b>METHODS</b>Primary cyclins (D1, E, A, B1) expressed in single cells separated from 68 cases gastric carcinoma tissues were analyzed by flow cytometry. We classified the gastric carcinomas by different types of the expressed primary cyclins, and explore the roles of primary cyclins expressed in cell cycle and the expression patterns of the cyclins. The results were analyzed together with clinicopathological features.</p><p><b>RESULTS</b>The patterns of expressed primary cyclins could be classified into five types. The proportion was 10.3% (7/68), 22.1% (15/68), 25.0% (17/68), 29.4% (20/68), and 13.2% (9/68), respectively, from type I to type V. Each type could be, according to the degree of in-cycle cyclins expressed, divided into different sub-types. The types of primary cyclins expressed were strongly linked to invasive depth and lymph node metastasis of the gastric carcinoma (P < 0.01). The rates of lymph node metastasis were 26.6%, 43.8%, 82.3%, 95.0%, and 100.0%, respectively, from type I to type V. The type of primary cyclins expressed was also significantly associated with disease stage (TNM stage). The proportion of stage IV disease was 0, 6.7%, 17.6%, 25.0% and 55.6%, respectively, from type I to type V. It was shown that there were relationships between the sub-types of primary cyclins expressed and different growth-types, degree of cell differentiation, or, the tumor gross types (P < 0.01).</p><p><b>CONCLUSIONS</b>The types of primary cyclins expression are different in the process of the occurrence, development and metastasis of gastric carcinoma, and are correlated with clinicopathological features of gastric carcinoma.</p>
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Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Diferenciación Celular , Ciclina A1 , Metabolismo , Ciclina B1 , Metabolismo , Ciclina D1 , Metabolismo , Ciclina E , Metabolismo , Ciclinas , Clasificación , Metabolismo , Metástasis Linfática , Invasividad Neoplásica , Estadificación de Neoplasias , Proteínas Oncogénicas , Metabolismo , Neoplasias Gástricas , Metabolismo , PatologíaRESUMEN
In this study, we prepared various matrices of hydrogel patches and studied their cross-linking mechanism by observing their rheological properties, which could provide theoretical basis and deep technical support for further industrial development of hydrogel patch. Rheology method was used to do the amplitude scanning and single-frequency scanning for various hydrogel matrix, under the condition of oscillation mode of the rheometer. Then the linear viscoelastic region, composite modulus value, as well as changes in slope with time of the composite modulus and phase angle of various hydrogel matrix were analyzed in detail. The results showed that the stability of matrix was mainly determined by hydrogel frame; only in acidic environment, the cross-linking reaction between cross-linker and hydrogel frame can occur; elasticity of matrix can be decreased by organic acid and the effect level was related to the ratio of the number of carboxyl and hydroxyl (-COO(-)/-OH) in adjusters: if the ratio was not equal, the higher -COO(-)/-OH in adjusters would be the less elasticity of matrix decreased; the cross-linking speed of matrix was determined by adjuster, the cross-linking speed of matrix contain different adjusters was ranged in following order: matrix containing tartaric acid > matrix containing lactic acid > matrix containing malic acid > matrix containing citric acid; the cross-linking speed of matrix was not uniform in the whole cross-linking process.
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Ácido Cítrico , Química , Reactivos de Enlaces Cruzados , Química , Hidrogeles , Química , Ácido Láctico , Química , Malatos , Química , Reología , Tartratos , Química , ViscosidadRESUMEN
Aromatase is a key enzyme responsible for in vivo estrogen biosynthesis. Inhibition of the activity of the aromatase has become an alterative way for treatment of breast cancer. In this review, the structure and catalytic mechanism of the aromatase is briefly introduced followed by thorough review of the progress in the study of the steroidal and non-steroidal aromatase inhibitors. This review is focused on the natural compounds that exhibit the aromatase inhibition, which include flavonoids, xanthones, coumarins, and sesquiterpenes. The structure-activity relationship of these compounds is also discussed.
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Humanos , Androstenodiona , Antineoplásicos , Química , Farmacología , Usos Terapéuticos , Aromatasa , Química , Metabolismo , Farmacología , Inhibidores de la Aromatasa , Química , Clasificación , Farmacología , Usos Terapéuticos , Neoplasias de la Mama , Quimioterapia , Catálisis , Cumarinas , Química , Farmacología , Estrógenos , Flavonoides , Química , Farmacología , Concentración 50 Inhibidora , Nitrilos , Química , Farmacología , Sesquiterpenos , Química , Farmacología , Relación Estructura-Actividad , Triazoles , Química , Farmacología , Xantonas , Química , FarmacologíaRESUMEN
Increased plasma creatine kinase-myoglobin (CK-MB) occurs in patients with acute myocardial infarction (AMI), but its underlying relationship with cytosolic phospholipase A2 (cPLA2) is poorly understood. In the present study we sought to determine cPLA2 activation and its relationship with plasma and myocardial CK-MB level and membrane phospholipids (PLs) in an animal model of AMI. AMI was induced in 60 male Sprague-Dawley rats by ligating the left anterior descending of coronary artery. Rats were randomized into six groups at 0 (sham group), 1, 2, 4, 6, and 12 h after AMI onset (ten rats in each group). cPLA2 was detected by reverse transcription polymerase chain reaction and immunohistochemical staining for mRNA and protein expression, respectively. Plasma and myocardial CK-MB activity were measured by inhibition kinetics, and membrane PLs were determined by phosphorus quantitative method. Myocardial cPLA2 expression increased from 1 h and reached a peak at 2 h after AMI onset (p < 0.01) followed by a decrease but still remained high, whereas plasma CK-MB significantly increased in rats from 4 h after the onset of AMI (p < 0.05). During the first 6 h of AMI, a negative correlation existed between myocardial cPLA2 and membrane PLs (r = -0.504, p < 0.01), whereas myocardial cPLA2 levels were positively associated with plasma CK-MB (r = 0.741, p < 0.01) but negatively correlated with myocardial CK-MB in AMI groups (r = -0.785, p < 0.01). Myocardial cPLA2 level increased and is positively correlated with plasma CK-MB activity and negatively correlated with membrane phospholipid content in AMI rats at early stage.
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Forma MB de la Creatina-Quinasa/metabolismo , Fosfolipasas A2 Grupo IV/metabolismo , Lípidos de la Membrana/metabolismo , Infarto del Miocardio/enzimología , Miocardio/enzimología , Fosfolípidos/metabolismo , Animales , Forma MB de la Creatina-Quinasa/sangre , Modelos Animales de Enfermedad , Regulación Enzimológica de la Expresión Génica , Fosfolipasas A2 Grupo IV/genética , Inmunohistoquímica , Masculino , Infarto del Miocardio/genética , ARN Mensajero/metabolismo , Ratas , Ratas Sprague-Dawley , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Factores de TiempoRESUMEN
Objective To investigate the constitution,density changes and carrier rate about Yersinia pestis of rodents in plague foci,and to provide the scientific evidence for plague prevention.Methods According to the program of national monitoring plague,two survey procedures,namely quadrat of single-ha for 24 h and 5 m mouse jam,were used to monitor the host animals; culture and identification of Yersinia pestis in liver or spleen of the experimental animals was carried out by using self-made medium in the north of Beiyuanzi village in Dingbian town Shaanxi province.Results One hundred twelve rodents were captured using the first procedures and the rodent average density was 8.62 ind./hm2 and six species of rodents were found namely Meriones unguiculatus ( 100 individuals),Microtusfortis(5 individuals),Ochotona daurica(3 individuals),Meriones meridianus (2 individuals),Mus musculus Linnaeus (1 individual) and Cricetulus barabensis (1 individual).One hundred seventy-three field mouses were captured using the second procedures including Mus musculus Linnaeus (136 individuals),Cricetulus barabensis (36 individuals),and Microtus fortis ( 1 individual ).Among them,Microtus fortis was found in the salt marshes in the southern edge of Ordos Plateau steppe in plague area of Dingbian county.Yersinia pestis was not identified in all animals.Conclusions Microtus fortis is found in natural foci of plague in Shaanxi province for the first time,and a new geographic region was found.Its epidemiological significance needs further study.
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<p><b>OBJECTIVE</b>To investigate in vitro cytotoxicity and oxidative stress response induced by multiwalled carbon nanotubes (MWCNTs).</p><p><b>METHODS</b>Cultured macrophages (murine RAW264.7 cells) and alveolar epithelium cells type II (human A549 lung cells) were exposed to the blank control, DNA salt control, and the MWCNTs suspensions at 2.5, 10, 25, and 100 μg/mL for 24 h. Each treatment was evaluated by cell viability, cytotoxicity and oxidative stress.</p><p><b>RESULTS</b>Overall, both cell lines had similar patterns in response to the cytotoxicity and oxidative stress of MWCNTs. DNA salt treatment showed no change compared to the blank control. In both cell lines, significant changes at the doses of 25 and 100 μg/mL treatments were found in cell viabilities, cytotoxicity, and oxidative stress indexes. The reactive oxygen species (ROS) generation was also found to be significantly higher at the dose of 10 μg/mL treatment, whereas no change was seen in most of the indexes. The ROS generation in both cell lines went up in minutes, reached the climax within an hour and faded down after several hours.</p><p><b>CONCLUSION</b>Exposure to MWCNTs resulted in a dose-dependent cytotoxicity in cultured RAW264.7 cells and A549 cells, that was closely correlated to the increased oxidative stress.</p>
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Animales , Humanos , Ratones , Técnicas de Cultivo de Célula , Línea Celular , Supervivencia Celular , Relación Dosis-Respuesta a Droga , Pulmón , Metabolismo , Patología , Macrófagos Alveolares , Metabolismo , Patología , Microscopía Electrónica de Rastreo , Microscopía Electrónica de Transmisión , Microscopía Fluorescente , Nanotubos de Carbono , Química , Toxicidad , Estrés Oxidativo , Especies Reactivas de Oxígeno , Metabolismo , Propiedades de SuperficieRESUMEN
OBJECTIVE: To explore the effects of adenovirus-delivered tissue inhibitor of metalloprotein- ases-3 (Ad-TIMP-3) on the irradiation sensitivity of human papillomavirus (HPV)-positive cervical cancer cells. METHODS: An adenovirus expressing TIMP-3 (Ad-TIMP-3), alone or in combination with irradiation,was used to treat HPV-positive cervical cancer cells HeLa-Luc and CaSki. The effects of Ad-TIMP-3 on the proliferation of HeLa-Luc and CaSki cells were detected with MTT assay. The effect of the combination of Ad-TIMP-3 and X-ray on the proliferation of cells were determined by clone formation assay. Twenty nude mice were equally randomly divided into four groups: normal control group,Ad-TIMP-3 group,X-ray group,and combination group. The size of tumor was measured separately,and tumor growth curves were drawn. RESULTS: Ad-TIMP-3 significantly inhibited the proliferation of HPV-positive cervical cancer cells in a dose-dependent manner. Combination of Ad-TIMP-3 and X-ray significantly decreased the clones of HeLa-Luc and CaSki than Ad-TIMP-3 or X-ray alone (P<0.05). The tumor weights were (0.216±0.098), (0.276±0.073), and (0.044±0.043) g, respectively, in Ad-TIMP-3 group, X-ray group,and combination group, which were all significantly lower than that in normal control group [(0.534±0.218) g] (all P<0.05). In addition,the tumor weight in the combination group was significantly lower than that in Ad-TIMP-3 group and X-ray group (both P<0.05). The tumor inhibition rate was 59.60%, 48.30%, and 91.80% in X-ray group, Ad-TIMP-3 group and combination group, respectively. CONCLUSIONS: Ad-TIMP-3 can effectively inhibit the proliferation of cervical cancer cells. When combined with X-ray,it can remarkably increase the irradiation sensitivity of HPV-positive cervical cancer cells,and thus suppress the tumorigenesis capability of these cells in vivo.
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Adenoviridae/genética , Inhibidor Tisular de Metaloproteinasa-3/genética , Neoplasias del Cuello Uterino/radioterapia , Animales , Línea Celular Tumoral , Proliferación Celular , Femenino , Vectores Genéticos , Humanos , Ratones , Ratones Desnudos , Papillomaviridae/genética , Tolerancia a Radiación , Transfección , Neoplasias del Cuello Uterino/patología , Neoplasias del Cuello Uterino/virologíaRESUMEN
Tyrosinase is a bifunctional enzyme which oxidizes the initial step of melanin biosynthesis, that is, conversion of tyrosine to dopa and subsequently dopa to dopaquinone. It is a glycosylated protein and a major regulator of melanogenesis. To date, many approaches have been tried to regulate tyrosinase activity and melanin content. To that end, we screened small interfering RNA sequences for sequence-inhibited tyrosinase expression in B16 cells and in C57BL/6 mice. We analyzed tyrosinase mRNA levels by quantitative real-time PCR and determined tyrosinase activity and melanin content at 24, 48, and 72 hours after transfection. Results showed that siNM_011661_001 was the most efficient small interfering RNA sequence in suppressing tyrosinase mRNA expression, and cells transfected with this sequence showed lower tyrosinase activity. Moreover, intravitreous injection of siNM_011661_001 in C57BL/6 mice induced an efficient and stable gene-specific inhibition of expression at the posttranscriptional level.
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AIM: To examine the relationship between corneal lymphangiogenesis and hemangiogenesis after keratoplasty.METHODS: Nineteen human corneas were obtained from 19 patients undergoing a second corneal transplantation in Zhongshan Ophthalmic Center in 2005. Blood and lymphatic vessels in human transplanted corneas were identified by lymphatic vessel endothelial receptor(LYVE-1) and platelet endothelial cell adhesion modecule-1(PECAM-1) immunohistochemistry, and double enzyme-histochemistry; then the association of corneal blood vessel counting (BVC) with lymphatic vessel counting (LVC) was examined.RESULTS: Corneal hemangiogenesis was present in 12 cases (63%), and lymphangiogenesis occurred in 5 cases (26%) of human transplanted corneas. In addition, corneal lymphangiogenesis was only present in vascularized corneas. LVC was strongly and positively correlated with BVC(r=0.725;P<0.01).CONCLUSION: Corneal lymphangiogenesis develops after keratoplasty, and strongly associates with hemangiogenesis.
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<p><b>OBJECTIVE</b>To explore the dose-effect relationship between lead exposure and nerve conduction velocity, and to assess risk characteristics of nerve conduction velocity induced by lead exposure.</p><p><b>METHODS</b>The external dose, internal dose (blood lead, urine lead) and the conduction velocity of peripheral nerve were examined. The benchmark dose of a population exposed to occupational lead was estimated to develop risk assessment of nerve conduction velocity in worker exposed to lead by use of BMDS (version 1.3.3). The BMDL in terms of blood lead and urine lead was calculated.</p><p><b>RESULTS</b>There was correlation between blood lead and urine lead. The sense nerve conduction velocity was decreased significantly in the group of lead exposure workers (P < 0.05). The BMDLs-05 for median nerve conduct velocity, ulnar nerve conduction velocity, and superficial peroneal nerve conduction velocity in terms of blood lead were 456.99, 332.36 and 468.38 microg/L respectively; the BMDLs-05 in terms of urine lead were 14.1, 9.2 and 13.6 microg/gCr respectively.</p><p><b>CONCLUSION</b>The internal dose is the better index to reflect the level of lead exposure. Blood lead is identified as a specific and sensitive biomarker for sense nerve conduction velocity reduction. Ulnar nerve conduction velocity can be used as highly sensitive biomarkers to screen the high risk population of lead exposure.</p>
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Adolescente , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Biomarcadores , Sangre , Plomo , Sangre , Intoxicación por Plomo , Sangre , Conducción Nerviosa , Exposición Profesional , Medición de Riesgo , Encuestas y CuestionariosRESUMEN
<p><b>OBJECTIVE</b>To explore the dose-effect relationship between 1-bromopropane (1-BP) exposure and health effects in workers.</p><p><b>METHODS</b>Occupational field investigations were conducted in 1-BP factories. Ambient 1-BP concentrations were detected with detection tube, and the 8 h time-weighted average individual exposure levels (TWA-8 h) were measured by passive sampler. Workers underwent questionnaire survey, neurological examination, nerve conduction velocity examination, vibration sensation test. routine blood test as well as blood biochemical test. According to TWA values or TWA x duration values, workers were divided into three dose groups for dose-effect relationship analysis. USEPA BMDS 2.1 software was applied to calculate 1-BP benchmark dose (BMD) and its 95% lower limit (BMDL).</p><p><b>RESULTS</b>The TWA-8h concentrations ranged from 0.35 to 535.19 mg/m3 (geo-mean 14.08 mg/m3). Dose-dependent analysis showed that the motor nerve distal latency (linear regression coefficient was 0.066 6), vibration sensation of toes (linear regression coefficient were 0.157 2 and 0.193 9), creatine kinase (linear regression coefficient was -1.05) and thyroid stimulating hormone levels (linear regression coefficient was 0.1024) of 1-BP exposed workers changed in a dose-dependent manner (P < 0.05). BMD calculation based on DL as 1-BP toxic effect endpoint showed that TWA-8h of the BMD values and BMDL values were 50.55 mg/m3 and 30.78 mg/m3, respectively.</p><p><b>CONCLUSION</b>1-BP causes dose-dependent changes in tibial nerve DL, vibration sensation, CK and TSH levels.</p>
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Adulto , Femenino , Humanos , Creatina Quinasa , Sangre , Hidrocarburos Bromados , Toxicidad , Dosis Máxima Tolerada , Conducción Nerviosa , Exposición Profesional , Nervio Tibial , Lugar de TrabajoRESUMEN
<p><b>OBJECTIVE</b>To investigate the health effects of 1-bromopropane (1-BP) on female exposed workers.</p><p><b>METHODS</b>Four 1-BP manufacturing plants were investigated. Workers were interviewed with questionnaire and examined with neurobehavioral core test battery, nerve conduction velocity tests of nervus tibialis and nervus suralis, vibration sensation test, hematological and biochemical tests. Ambient 1-BP concentration was measured with detection tube, and time-weighed average levels of individual workers were estimated with passive samplers.</p><p><b>RESULTS</b>1-BP concentration in the plants ranged from 0 to 402.40 mg/m3 (Geomean 32.19 mg/m3). Time-weighted average exposure levels (TWA-8 h) ranged from 0.35 to 535.19 mg/m3 (Geomean 14.08 mg/m3). Compared with the control group, 1-BP exposed workers showed reduced motor nerve conduction velocity [(44.8 +/- 8.7) m/s] and sensory nerve conduction velocity [(45.5 +/- 4.9) m/s], prolonged distal latency [(7.5 +/- 2.1) ms], reduced toe vibration perception, and altered neurobehavior parameters(POMS vigor, tension, anxiety, confusion) significantly (P < 0.05). As to hematological and biochemical indicators, the exposed workers showed decreased white blood cell count [(5.6 +/- 2.17) x 10(3)/microl], red blood cell count [(3.9 +/- 0.4) x 10(6)/microl], hemoglobin [(121.1 +/- 14.5) g/L] and creatine kinase [(82.0 +/- 27.5) IU/L] (P < 0.05), and increased serum total protein (8.0 +/- 0.5 g/dl), lactate dehydrogenase [(335.2 +/- 356.6) IU/L], thyroid-stimulating hormone [(3.6 +/- 2.3) microIU/ml] and follicle-stimulating hormone levels (18.7 +/- 24.4 mIU/ml) (P < 0.05).</p><p><b>CONCLUSION</b>1-BP exposure may affect peripheral nerves and central nervous system, and lead to abnormal hematological and biomedical indicators.</p>
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Adulto , Femenino , Humanos , Persona de Mediana Edad , Adulto Joven , Creatina Quinasa , Metabolismo , Pruebas Hematológicas , Hemoglobinas , Metabolismo , Hidrocarburos Bromados , Sistema Nervioso , Conducción Nerviosa , Exposición ProfesionalRESUMEN
BACKGROUND AND AIMS: Group IIa secretory phospholipase A2 (sPLA2 IIa) induces atherosclerosis by altering systemic lipoprotein mechanism. The aim of this study was to investigate the expression and localization of sPLA2 IIa in atherosclerosis of rat aorta, myocardium and visceral adipose tissue (VAT) and to explore the effect of simvastatin on sPLA2 IIa expression. METHODS: Thirty male Wistar rats were randomly divided into three groups: control group, test group, and simvastatin group. Control group rats were fed with standard chow, whereas those in the test group were fed with a high cholesterol diet. Simvastatin (5 mg/kg/day per gavage) was given to the rats in simvastatin group in addition to the high cholesterol diet. At the end of 8 weeks, rats were sacrificed and sPLA2 IIa measured by immunocytochemistry. RESULTS: sPLA2 IIa was present in smooth muscle cells, aortic plaques, and also in myocardium and VAT. In addition, sPLA2 IIa expression in myocardium and aorta was much higher in the test group than in control group (p <0.01). However, expression of the enzyme in myocardium and aorta was significantly decreased in the simvastatin group compared to the test group (p <0.05). Immunostaining of sPLA2 IIa was also present in VAT, but no significant changes were found in levels of this enzyme among the three groups (p >0.05). CONCLUSIONS: Myocardium and VAT may be two other important sources of sPLA2 IIa. Our data support the hypothesis that sPLA2 IIa may play a significant role in the pathogenesis of atherosclerosis. Simvastatin may reduce the process of atherosclerosis by decreasing the expression level of sPLA2 IIa in myocardium and aorta.