Analysis of Nucleotide Alterations in the E6 Genomic Region of Human Papillomavirus Types 6 and 11 in Condyloma Acuminatum Samples from Brazil.

Condyloma acuminata (CA), or genital warts, are benign proliferative epidermal or mucous lesions that are caused by infection with human papillomavirus (HPV), mainly the low-risk types 6 and 11. HPV variants are defined as viral sequences that share identity in the nucleotide sequence of the L1 gene greater than 98%. Based on this criterion, HPV6 and 11 variant lineages have been studied, and there are ongoing attempts to correlate these genetic variants with different clinical findings of infection. Therefore, the aims of this study were to detect variants and nucleotide alterations present in the E6 regions of HPV types 6 and 11 found in CA samples, to correlate the HPV presence with the clinical-pathological data of the patients, and to determine phylogenetic relationships with variants from other places in the world. The E6 regions of 25 HPV6 samples and 7 HPV11 samples from CA were amplified using PCR with specific primers. The products were ligated to a cloning vector and five colonies of each sample were sequenced to observe the nucleotide alterations. Twelve samples were identified as the HPV6B3 variant, presenting the mutation (guanine) G474A (adenine), and one of them also showed the mutation (thymine) T369G. The other 13 patients were positive for HPV6B1 without nucleotide alterations. In the analysis of the HPV11 samples, all patients showed the mutations T137C and (cytosine) C380T. One patient also presented the nucleotide alteration T410C. None of the mutations found in the 32 analyzed samples resulted in amino acid changes. Patient age, local occurrence, and HIV infection did not show significant association with HPV infection. Besides, the data found in this study did not show a relationship with the geographical region of isolation when compared to other data from different regions of the world. In this way, despite the nucleotide alterations found, it was not possible to observe amino acid changes and variants grouping according to geographical region.

Hierarchical assessment of host factors influencing the spontaneous resolution of hepatitis C infection.

BACKGROUND: Hepatitis C virus (HCV) infection is associated with chronic liver disease, resulting in cirrhosis and hepatocellular carcinoma. Approximately 20% of HCV infections are spontaneously resolved. Here, we assessed the hierarchical relevance of host factors contributing to viral clearance. METHODS: DNA samples from 40 resolved infections and 40 chronic HCV patients paired by age were analyzed. Bivariate analysis was performed to rank the importance of each contributing factor in spontaneous HCV clearance. RESULTS: Interestingly, 63.6% of patients with resolved infections exhibited the protective genotype CC for SNP rs12979860. Additionally, 59.3% of patients with resolved infections displayed the protective genotype TT/TT for SNP ss469415590. Moreover, a ranking of clearance factors was estimated. In order of importance, the IL28B CC genotype (OR 0.197, 95% CI 0.072-0.541) followed by the INFL4 TT/TT genotype (OR 0.237, 95% CI 0.083-0.679), and female gender (OR 0.394, 95% CI 0.159-0.977) were the main predictors for clearance of HCV infection. CONCLUSIONS: HCV clearance is multifactorial and the contributing factors display a hierarchical order. Identifying all elements playing role in HCV clearance is of the most importance for HCV-related disease management. Dissecting the relevance of each contributing factor will certainly improve our understanding of the pathogenesis of HCV infection.

Detection and genotyping of human papillomavirus (HPV) in HIV-infected women and its relationship with HPV/HIV co-infection.

HPV have been identified as high-risk and low-risk, depending on their association with the development of cancer. HPV infections can be facilitated by co-infection with HIV. Here, we investigated HPV prevalence and genotypes and the risk factors affecting HPV/HIV co-infection. Forty HIV-positive patients had 80 cervical swab samples collected in 2 consecutive years. Polymerase chain reaction and DNA direct sequencing were used to perform HPV genotyping. Statistical analyses were performed regarding risk factors for HPV/HIV co-infection and the occurrence of cervical lesions. HPV DNA was detected in 59 samples (73.75%), and high-risk HPVs were predominant (59.3%). The most prevalent type was HPV56 (17%), followed by HPV16 (15.3%). Patient age did not affect the risk of cervical cancer (P = .84) or HPV prevalence in different years (P = .25/P = .63). CD4 count also did not affect the risk for cervical lesions in the tested samples (P = .15/P = .28). Although the HIV viral load was not correlated with an increase in cervical lesion detection in the first group of analyzed samples (P = .12), it did affect cervical cancer risk in the group of samples analyzed in the following year (P = .045). HIV-infected patients presented a high prevalence of HPV co-infection, and HPV16 and HPV56 were the most prevalent genotypes. Considering this, it is possible that immunodeficiency can contribute to increased susceptibility to HPV56 infection in HIV-infected patients. The association between HIV viral load and the lesions also confirmed the importance of monitoring HIV/HPV co-infected patients with high HIV viral loads.

Interaction between inflammatory mediators and miRNAs in Helicobacter pylori infection.

Helicobacter pylori cause chronic inflammation favouring gastric carcinogenesis, and its eradication may prevent malignant transformation. We evaluated whether H. pylori infection and its eradication modify the expression of inflammatory mediators in patients with chronic gastritis. Furthermore, we assessed whether microRNAs modulate inflammatory pathways induced by H. pylori and identified miRNA-gene interaction networks. mRNA and protein expression of TNFA, IL6, IL1B, IL12A, IL2 and TGFBRII and miRNAs miR-103a-3p, miR-181c-5p, miR-370-3p, miR-375 and miR-223-3p were evaluated in tissue samples from 20 patients with chronic gastritis H. pylori negative (Hp-) and 31 H. pylori positive (Hp+), before and three months after bacterium eradication therapy, in comparison with a pool of Hp- normal gastric mucosa. Our results showed that H. pylori infection leads to up-regulation of TNFA, IL6, IL12A and IL2 and down-regulation of miRNAs. Bacterium eradication reduces the expression of TNFA and IL6 and up-regulates TGFBRII and all investigated miRNAs, except miR-223-3p. Moreover, transcriptional profiles of inflammatory mediators and miRNAs after eradication are different from the non-infected group. Deregulated miRNA-mRNA interaction networks were observed in the Hp+ group before and after eradication. Therefore, miRNAs modulated cytokine expression in the presence of H. pylori and after its eradication, suggesting that miRNAs participate in the pathological process triggered by H. pylori in the gastric mucosa.

Differential Expression of ADAM23, CDKN2A (P16), MMP14 and VIM Associated with Giant Cell Tumor of Bone.

Though benign, giant cell tumor of bone (GCTB) can become aggressive and can exhibit a high mitotic rate, necrosis and rarely vascular invasion and metastasis. GCTB has unique histologic characteristics, a high rate of multinucleated cells, a variable and unpredictable growth potential and uncertain biological behavior. In this study, we sought to identify genes differentially expressed in GCTB, thus building a molecular profile of this tumor. We performed quantitative real-time polymerase chain reaction (qPCR), immunohistochemistry and analyses of methylation to identify genes that are putatively associated with GCTB. The expression of the ADAM23 and CDKN2A genes was decreased in GCTB samples compared to normal bone tissue, measured by qPCR. Additionally, a high hypermethylation frequency of the promoter regions of ADAM23 and CDKN2A in GCTB was observed. The expression of the MAP2K3, MMP14, TIMP2 and VIM genes was significantly higher in GCTB than in normal bone tissue, a fact that was confirmed by qPCR and immunohistochemistry. The set of genes identified here furthers our understanding of the molecular basis of GCTB.

Could acupuncture at the so-called forbidden points be harmful to the health of pregnant Wistar rats?

AIM: This study is the second report from a single experiment planned to determine if acupuncture at LI4 and SP6, or at the sacral points, could produce any harm in the pregnancy outcome of Wistar rats, as has been hypothesised in traditional knowledge. Here, we observe if these points can be harmful to the health of pregnant Wistar rats. METHODS: A total of 48 pregnant Wistar rats were randomly divided into 4 groups: total control, where rats were left in cages without manipulation; anesthetised control, where rats were manipulated and anesthetised but did not receive electroacupuncture; and peripheral point and sacral point groups, where rats were anesthetised and received 6 sessions of electroacupuncture at 4 acupuncture points: LI4 and SP6, and BL27 and BL28, respectively. In the 19th day of pregnancy the rats were killed and examined. The primary endpoints were levels of glucose, aspartate aminotransferase (AST), alanine aminotransferase (ALT) creatinine and histological changes of liver and kidney. RESULTS: There were no differences between the levels of biochemical parameters. No differences were also seen regarding the histopathological analysis. CONCLUSIONS: We found no evidence that acupuncture at the LI4, SP6 and sacral points could be harmful to the Wistar rat dams.

The influence of physical activity in the progression of experimental lung cancer in mice.

Lung cancer is one of the most incident neoplasms in the world, representing the main cause of mortality for cancer. Many epidemiologic studies have suggested that physical activity may reduce the risk of lung cancer, other works evaluate the effectiveness of the use of the physical activity in the suppression, remission and reduction of the recurrence of tumors. The aim of this study was to evaluate the effects of aerobic and anaerobic physical activity in the development and the progression of lung cancer. Lung tumors were induced with a dose of 3mg of urethane/kg, in 67 male Balb - C type mice, divided in three groups: group 1_24 mice treated with urethane and without physical activity; group 2_25 mice with urethane and subjected to aerobic swimming free exercise; group 3_18 mice with urethane, subjected to anaerobic swimming exercise with gradual loading 5-20% of body weight. All the animals were sacrificed after 20 weeks, and lung lesions were analyzed. The median number of lesions (nodules and hyperplasia) was 3.0 for group 1, 2.0 for group 2 and 1.5-3 (p=0.052). When comparing only the presence or absence of lesion, there was a decrease in the number of lesions in group 3 as compared with group 1 (p=0.03) but not in relation to group 2. There were no metastases or other changes in other organs. The anaerobic physical activity, but not aerobic, diminishes the incidence of experimental lung tumors.

Maternal risk for Down syndrome is modulated by genes involved in folate metabolism.

Studies have shown that the maternal risk for Down syndrome (DS) may be modulated by alterations in folate metabolism. The aim of this study was to evaluate the influence of 12 genetic polymorphisms involved in folate metabolism on maternal risk for DS. In addition, we evaluated the impact of these polymorphisms on serum folate and plasma methylmalonic acid (MMA, an indicator of vitamin B_{12} status) concentrations. The polymorphisms transcobalamin II (TCN2) c.776C>G, betaine-homocysteine S-methyltransferase (BHMT) c.742A>G, methylenetetrahydrofolate reductase (NAD(P)H) (MTHFR) c.677 C>T and the MTHFR 677C-1298A-1317T haplotype modulate DS risk. The polymorphisms MTHFR c.677C>T and solute carrier family 19 (folate transporter), member 1 (SLC19A1) c.80 A>G modulate folate concentrations, whereas the 5-methyltetrahydrofolate-homocysteine methyltransferase reductase (MTRR) c.66A>G polymorphism affects the MMA concentration. These results are consistent with the modulation of the maternal risk for DS by these polymorphisms.

Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion, viral respiratory infections vary according to temperature and relative air humidity and viral respiratory infections present major incidences it coldest and driest periods.

Influence of HLA-DRB-1 alleles on the production of antibody against CSP, MSP-1, AMA-1, and DBP in Brazilian individuals naturally infected with Plasmodium vivax.

We evaluated the influence of allelic frequency of the human leukocyte antigen (HLA) -DRB1 on the acquisition of antibody response against malaria sporozoite and merozoite peptides in patients with Plasmodium vivax malaria acquired in endemic areas of Brazil. IgG antibodies were detected by enzyme-linked immunosorbent assay against four peptides of circumsporozoite protein (CSP) (amino, carboxyl, and VK210 and VK247 repeats) and peptides of merozoite surface protein 1 (MSP-1), apical membrane antigen 1 (AMA-1), and Duffy-binding protein (DBP). We found an association between HLA-DR3 and HLA-DR5 alleles and lack of antibody response to CSP amino terminal, as well as an association between HLA-DR3 and the highest antibody response to MSP1 (Pv200L). In conclusion, we suggest a potential regulatory role of the HLA-DRB1 alleles in the production of antibodies to a conserved region of P. vivax CSP and MSP1 in Brazilian population exposed to malaria.

Seasonality of viral respiratory infections in southeast of Brazil: the influence of temperature and air humidity.

Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion, viral respiratory infections vary according to temperature and relative air humidity and viral respiratory infections present major incidences it coldest and driest periods.

WHO disability grade does not influence physical activity in Brazilian leprosy patients.

Disability caused by leprosy may be associated with stigma. The aim of this work is to describe the degree of disability, quality of life and level of physical activity of individuals with leprosy and to identify possible correlations between these factors. Ninety-seven patients from two referral centres were studied. A complete medical history was taken and the World Health Organization degree of physical disability classification (WHO-DG), the International Physical Activity Questionnaire (IPAQ) and the Medical Outcome Study 36-item Short-form health Survey (SF36) were applied. The mean age of patients was 51 +/- 14.9 years old; participants were predominantly men, married, unemployed, had concluded treatment and had had lepromatous leprosy. The WHO-DG and the level of physical activity (P-value = 0.36) were not correlated. The WHO-DG showed that 72.2% of patients had disabilities, 37.1% of whom performed vigorous physical activities. No significant association was observed between the WHO-DG and the domains of the QoL SF-36 except for functional capacity (P-value = 0.02); the physical capacity is generally 'very good' when individuals have no disabilities and 'bad' with severe disabilities. In conclusion, the WHO-DG of leprosy patients does not affect the level of physica activities or quality of life except functional capacity. There is no significan association between physical activities and quality of life in these individuals.

Discrepâncias clínico-patológicas e achados cardiovasculares em 409 autópsias consecutivas / Clinical and pathological discrepancies and cardiovascular findings in 409 consecutive autopsies

FUNDAMENTO: As discrepâncias entre os diagnósticos clínicos e em autópsia persistem em todo o mundo. OBJETIVO: Avaliamos as autópsias em um hospital-escola para analisar a precisão dos diagnósticos cardiovasculares clínicos em comparação aos achados post-mortem. MÉTODOS: As 409 autópsias consecutivas entre 2003 e 2006 foram analisadas em um hospital terciário de São José do Rio Preto, São Paulo (SP), Brasil. A comparação dos achados cardiovasculares clínicos e patológicos foi realizada por meio da classificação de discrepâncias de Goldman. RESULTADOS: A taxa de autópsia no hospital foi de 8 por cento. As causas cardiovasculares de óbito representavam 42,8 por cento (175 de 409 pacientes) dos diagnósticos de autópsia. Em 98 pacientes (56 por cento), houve discrepâncias significativas (classes I e II), o que representa uma grande proporção de diagnósticos equivocados de infarto mesentérico (84,6 por cento), infarto agudo do miocárdio (64,7 por cento), dissecção da aorta (64,2 por cento) e embolia pulmonar (62,5 por cento). Foram observadas maiores taxas de concordância para a insuficiência cardíaca congestiva (59 por cento) e para o acidente vascular cerebral isquêmico agudo (58,8 por cento). A idade, o sexo, o tempo de permanência e a última unidade de admissão no hospital não foram associados aos critérios de Goldman. CONCLUSÃO: As discrepâncias dos diagnósticos clínicos e em autópsia relativos à morte cardiovascular permanecem elevados no Brasil, a despeito dos recursos tecnológicos disponíveis. Além disso, nossos achados reforçam a importância do exame post-mortem como uma contribuição para a melhoria da assistência médica.

BACKGROUND: Discrepancies between clinical and autopsy diagnoses persists worldwide. OBJECTIVE: We evaluated autopsies in a university hospital in order to assess the accuracy of clinical cardiovascular diagnosis compared to postmortem findings. METHODS: Four hundred nine consecutive autopsies between 2003 and 2006 were analyzed in a tertiary-care hospital in São José do Rio Preto, SP, Brazil. The comparison of clinic-pathological cardiovascular findings was performed using Goldman's discrepancies classification. RESULTS: Autopsy rate at the hospital was 8 percent. Cardiovascular causes of death represented 42.8 percent (175 out of 409 patients) of autopsy diagnoses. In 98 (56 percent) patients, there were major discrepancies (class I and II), representing a large proportion of misdiagnoses for mesenteric infarction (84.6 percent), acute myocardial infarction (64.7 percent), aorta dissection (64.2 percent), and pulmonary embolism (62.5 percent). Highest concordance rates were observed in congestive heart failure (59 percent) and acute ischemic stroke (58.8 percent). Age, sex, length of stay and the last admission unit at the hospital were not associated with Goldman criteria. CONCLUSION: Clinic-autopsy discrepancies concerning cardiovascular death remain high in Brazil, despite technological resources available. Moreover, our findings reinforce the importance of postmortem examination in contributing to medical care improvement.

Clinical and pathological discrepancies and cardiovascular findings in 409 consecutive autopsies.

BACKGROUND: Discrepancies between clinical and autopsy diagnoses persists worldwide. OBJECTIVE: We evaluated autopsies in a university hospital in order to assess the accuracy of clinical cardiovascular diagnosis compared to postmortem findings. METHODS: Four hundred nine consecutive autopsies between 2003 and 2006 were analyzed in a tertiary-care hospital in São José do Rio Preto, SP, Brazil. The comparison of clinic-pathological cardiovascular findings was performed using Goldman's discrepancies classification. RESULTS: Autopsy rate at the hospital was 8%. Cardiovascular causes of death represented 42.8% (175 out of 409 patients) of autopsy diagnoses. In 98 (56%) patients, there were major discrepancies (class I and II), representing a large proportion of misdiagnoses for mesenteric infarction (84.6%), acute myocardial infarction (64.7%), aorta dissection (64.2%), and pulmonary embolism (62.5%). Highest concordance rates were observed in congestive heart failure (59%) and acute ischemic stroke (58.8%). Age, sex, length of stay and the last admission unit at the hospital were not associated with Goldman criteria. CONCLUSION: Clinic-autopsy discrepancies concerning cardiovascular death remain high in Brazil, despite technological resources available. Moreover, our findings reinforce the importance of postmortem examination in contributing to medical care improvement.

Análise da ação da Himatanthus drasticus na progressão do câncer de pulmão induzido por uretana em camundongos / Analysis of the action of Himatanthus drasticus in progression of urethane-induced lung cancer in mice

Objective: To evaluate the effect of janaguba in inhibiting the development of lung cancer in an experimental urethane-induced model. Methods: a total of 3 mg/kg urethane was injected in 51 Balb-C mice aged 7-13 weeks of life. Janaguba was administered orally daily in two doses: 0.04 mL (Group 2, G2) and 0.06 mL (Group 3, G3), for 20 weeks. After this period, the mice were sacrificed and the number of lesions counted. Results: The mean weight of Group 2 was lower than that of Group 3, and that of Group 1 (Control, G1) (G1 = 35.533 g; G2 = 33.359 g; G3 = 37.125 g). The number of nodules did not differ between groups (mean G1 = G2 = G3 = 1; p = 0.88). Conclusion: Janaguba had an effect on the growth of mice, but had no influence on the progression of lung cancer in this model.

Objetivo: Avaliar a ação da janaguba na inibição do desenvolvimento de câncer de pulmão em modelo experimental induzido por uretana. Métodos: Foram injetados 3mg/kg de uretana em 51 camundongos Balb-C , com 7 a 13 semanas de vida. Janaguba foi administrada via oral diariamente em duas doses: 0,04 mL (Grupo 2, G2) e 0,06 mL(Grupo 3,G3), por 20 semanas. Após esse período, os camundongos foram sacrificados e o número de lesões, contado. Resultados: A média de peso do Grupo 2 foi menor que a do Grupo 3, e que a do Grupo 1 (Controle, G1) (G1 = 35,533 g; G2 = 33,359 g; G3 = 37,125 g). O número de nódulos não diferiu entre os grupos (média G1 = G2 = G3 = 1; p = 0,88). Conclusão: A janaguba apresentou um efeito no crescimento dos camundongos, mas não apresentou influência na progressão do câncer de pulmão neste modelo.

Diabetic ketoacidosis: difference between potassium determined by blood gas analysis versus plasma measurement.

OBJECTIVE: To evaluate the accuracy of potassium concentrations measured by blood gas analysis (PBG) compared with laboratory serum potassium (LSP), in the initial care of patients with diabetic ketoacidosis (DKA). SUBJECTS AND METHODS: Fifty three patients with diabetes mellitus were evaluated in a retrospective analysis. PBG was carried out using the Radiometer ABL 700 (Radiometer Copenhagen(®)), and results were compared with LSP ADVIA 1650 Chemistry system (Siemens(®)), the gold standard method. Both methods are based on potentiometry. RESULTS: Mean PBG was 3.66 mmol/L and mean LSP was 4.79 mmol/L. Mean difference between PBG and LSP was -1.13 mmol/L (p < 0.0005, 95% CI, -1.39 to -0,86). Lin concordance correlation coefficient was rc = 0.28 (95% CIb, 0.10 to 0.45), demonstrating low concordance between the methods. CONCLUSION: Although PBG measurement is faster and easier, it should not be used as a surrogate for LSP in the clinical treatment of DKA.

Diabetic ketoacidosis: difference between potassium determined by blood gas analysis versus plasma measurement / Cetoacidose diabética: diferença entre as concentrações do potássio na gasometria sanguínea versus potássio plasmático

OBJECTIVE: To evaluate the accuracy of potassium concentrations measured by blood gas analysis (PBG) compared with laboratory serum potassium (LSP), in the initial care of patients with diabetic ketoacidosis (DKA). SUBJECTS AND METHODS: Fifty three patients with diabetes mellitus were evaluated in a retrospective analysis. PBG was carried out using the Radiometer ABL 700 (Radiometer Copenhagen®), and results were compared with LSP ADVIA 1650 Chemistry system (Siemens®), the gold standard method. Both methods are based on potentiometry. RESULTS: Mean PBG was 3.66 mmol/L and mean LSP was 4.79 mmol/L. Mean difference between PBG and LSP was -1.13 mmol/L (p < 0.0005, 95 percent CI, -1.39 to -0,86). Lin concordance correlation coefficient was rc = 0.28 (95 percent CIb, 0.10 to 0.45), demonstrating low concordance between the methods. CONCLUSION: Although PBG measurement is faster and easier, it should not be used as a surrogate for LSP in the clinical treatment of DKA.

OBJETIVO: Avaliar a acurácia da mensuração da concentração de potássio realizado nos analisa-dores de gasometria sanguínea (PGS) em relação ao potássio plasmático laboratorial (PPL) no atendimento inicial dos pacientes com cetoacidose diabética (CAD). SUJEITOS E MÉTODOS: Foram avaliados, retrospectivamente, 53 pacientes com diabetes melito e CAD. A análise do PGS foi realizada pelo equipamento ABL 700 (Radiometer Copenhagen®), sendo este comparado ao método padrão-ouro de PPL ADVIA 1650 (Siemens®), ambos por potenciometria. RESULTADOS: A média do PGS foi de 3,66 mmol/L e do PPL, de 4,79 mmol/L. A diferença das médias do PGS em relação ao PPL foi de -1,13 mmol/L (p < 0,0005, IC = 95 por cento; -1,39 a -0,86). O coeficiente de concordância de Lin foi de rc = 0,28 (ICb = 95 por cento; 0,10 a 0,45), demonstrando, assim, uma baixa concordância entre os métodos. CONCLUSÃO: Apesar de a realização do PGS ser tecnicamente mais rápida e fácil, não deve ser usada como parâmetro substituto ao PPL para o tratamento clínico da CAD.

The effects of so-called 'forbidden acupuncture points' on pregnancy outcome in wistar rats.

BACKGROUND: This study sought to determine if acupuncture in LI4 and SP6, or in sacral points could harm the pregnancy outcome in Wistar rats as is believed according to traditional knowledge. METHODS: 48 pregnant Wistar rats were randomly divided into 4 groups: total control where the rats were left in cages without manipulation; anesthetized control where the rats were manipulated and anesthetized but did not received electroacupuncture; peripheral points and sacral points were the rats were anesthetized and received 4 acupuncture points - LI4-SP6 and BL27-28, respectively. The primary end point was embryonic loss after implantation, defined as (number of implantations - number of embryos in development) × 100 / number of implantations. Other evaluated parameters were fetal death, abortions, number of fetuses, and resorptions, resorption index (number of resorptions / total of implantations), maternal weight gain, and fetal weight. RESULTS: There were no differences in embryonic loss after implantation (p = 0.45), fetal death (p = 1), abortions (p = 1), number of fetuses (p = 0.79), resorptions (p = 0.3), and resorption index (p = 0.45). There were differences in maternal weight gain and fetal weight, but they seemed unrelated to the treatment. CONCLUSIONS: We found no evidence that acupuncture in LI4-SP6 and sacral points could be harmful to the pregnancy outcome in Wistar rats.

Differentially expressed genes in giant cell tumor of bone.

Giant cells tumors of bone (GCTB) are benign in nature but cause osteolytic destruction with a number of particular characteristics. These tumors can have uncertain biological behavior often contain a significant proportion of highly multinucleated cells, and may show aggressive behavior. We have studied differential gene expression in GCTB that may give a better understanding of their physiopathology, and might be helpful in prognosis and treatment. Rapid subtractive hybridization (RaSH) was used to identify and measure novel genes that appear to be differentially expressed, including KTN1, NEB, ROCK1, and ZAK using quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry in the samples of GCTBs compared to normal bone tissue. Normal bone was used in the methodology RaSH for comparison with the GCTB in identification of differentially expressed genes. Functional annotation indicated that these genes are involved in cellular processes related to their tumor phenotype. The differential expression of KTN1, ROCK1, and ZAK was independently confirmed by qRT-PCR and immunohistochemistry. The expression of the KTN1 and ROCK1 genes were increased in samples by qRT-PCR and immunohistochemistry, and ZAK had reduced expression. Since ZAK have CpG islands in their promoter region and low expression in tumor tissue, their methylation pattern was analyzed by MSP-PCR. The genes identified KTN1, ROCK1, and ZAK may be responsible for loss of cellular homeostasis in GCTB since they are responsible for various functions related to tumorigenesis such as cell migration, cytoskeletal organization, apoptosis, and cell cycle control and thus may contribute at some stage in the process of formation and development of GCTB.

Analysis of the action of Himatanthus drasticus in progression of urethane-induced lung cancer in mice.

OBJECTIVE: To evaluate the effect of janaguba in inhibiting the development of lung cancer in an experimental urethane-induced model. METHODS: a total of 3mg/kg urethane was injected in 51 Balb-C mice aged 7-13 weeks of life. Janaguba was administered orally daily in two doses: 0.04 mL (Group 2, G2) and 0.06 mL (Group 3, G3), for 20 weeks. After this period, the mice were sacrificed and the number of lesions counted. RESULTS: The mean weight of Group 2 was lower than that of Group 3, and that of Group 1 (Control, G1) (G1 = 35.533 g; G2 = 33.359 g; G3 = 37.125 g). The number of nodules did not differ between groups (mean G1 = G2 = G3 = 1; p = 0.88). CONCLUSION: Janaguba had an effect on the growth of mice, but had no influence on the progression of lung cancer in this model.