Morphology of mitochondrial permeability transition: morphometric volumetry in apoptotic cells.

Here we report on the mitochondrial permeability transition (MPT), which refers to the morphology of mitochondria whose inner membrane has lost its selective permeability. In all types of apoptotic cells so far examined, we found outer mitochondrial membranes that had been ruptured. These mitochondria present a swollen matrix covered by an inner membrane herniating into the cytoplasm through the breached outer membrane. Similarly ruptured outer mitochondrial membranes have been reported in studies on mitochondrial fractions induced to undergo MPT, carried out by others. Our observations were made on five types of rat tissue cells and six different cultured cell lines in the early stages of apoptosis. Samples from the cell lines HL-60, HeLa, WEHI-164, and a special batch of PC-12 cells were subjected to various apoptogenic agents and analyzed morphometrically. Nonapoptotic companion cells with unaltered nuclear structure (CUNS) were also analyzed. The mitochondrial volume in microm(3) and the volume fraction of the cytoplasm occupied by mitochondria in cells with typical nuclear signs of apoptosis and also in CUNS were evaluated. The volume of the mitochondria with ruptured membrane represents at least 69% (47-89%) of the total mitochondrial volume of the apoptotic cells. Thus, a considerable fraction of the cellular mitochondrial mass is or was in the state of permeability transition and probably involved in enhancement of the apoptotic program. In all samples, a fraction of the cells with normal nuclei possessed mitochondria with breached outer membranes as described above. In these cells, MPT occurred before the appearance of the typical nuclear phenotype of the apoptotic cells.

[Desire for information and participation in therapeutic decisions concerning severe diseases, in patients of a university hospital]. / Desejo de informação e participação nas decisões terapêuticas em caso de doenças graves em pacientes atendidos em um hospital universitário.

BACKGROUND: The purpose of our study was to evaluate the desire of the patients on being informed about diagnosis of severe diseases, the desire to have their families informed about this situation and to participate in therapeutic decisions. METHODS: 363 patients (outpatients and inpatients) of a General Internal Medicine division of a University Hospital were interviewed. The questionnaire contained specific questions on their desire to be informed of the diagnosis in case of cancer or AIDS and on their desire to have their families informed as well. Specific questions on whether they wanted to be informed of and participate of the therapeutic discussion process in case of abdominal tumors were also included. RESULTS: 96.1% of men and 92.6% of women showed the desire of being informed in case of cancer diagnosis and 87.7% of men and 84.2% of women wanted to have their families informed, 94.2% of men and 91% of women wanted to know the diagnosis of AIDS. While 86% of women and 76.6% of men wanted be informed in the case of a diagnosis of an abdominal tumor, only 58.5% of women and 39.6% of men wanted to give their opinion about in the case of different therapeutic alternatives. The desire to participate in therapeutic decisions was significantly lower (p<0.05) in men, people older than 60 years and inpatients. CONCLUSIONS: Our results showed that the great majority of the population that seeks for medical support in a Brazilian university hospital wishes to be informed on this health condition, even in case of serious illness. In addition, there are intense familiar bonds that make patients want to have their families also informed.

Hypertension in employees of a University General Hospital.

PURPOSE: To find out the prevalence of hypertension in employees of the Hospital and relate it to social demographic variables. METHODS: Blood pressure measurement was performed with a mercury sphygmomanometer, using an appropriate cuff size for arm circumference, weight, and height in a population sample of 864 individuals out of the 9,905 employees of a University General Hospital stratified by gender, age, and job position. RESULTS: Hypertension prevalence was 26% (62% of these reported being aware of their hypertension and 38% were unaware but had systolic/diastolic blood pressures of >140 and/or >90 mm Hg at the moment of the measurement). Of those who were aware of having hypertension, 51% were found to be hypertensive at the moment of the measurement. The prevalence was found to be 17%, 23%, and 29% (P <.05) in physicians, nursing staff, and "others", respectively. The univariate analysis showed a significant odds ratio for the male gender, age >50 years, work unit being the Institute of Radiology and the Administration Building, educational level 10 years, and body mass index >30 kg/m2. The multivariate logistic regression model revealed a statistically significant association of hypertension with the following variables: gender, age, skin color, family income, and body mass index. CONCLUSIONS: Hypertension prevalence was high, mainly in those who were not physicians or members of the nursing staff. High-risk groups (obese, non-white, men, low family income) should be better advised of prevention and early diagnosis of hypertension by means of special programs.

Hypertension in employees of a University General Hospital

OBJETIVO: Conhecer a prevalência de hipertensão arterial em funcionários de um complexo hospitalar e relacionar com variáveis sócio demográficas. MÉTODOS: Foi medida a pressão arterial com aparelho de coluna de mercúrio e manguito adequado à circunferência do braço, o peso e a altura em amostra de 864 dos 9.905 funcionários do Hospital Universitário estratificada de acordo com sexo, idade e ocupação. RESULTADOS: A prevalência de hipertensão foi de 26% (hipertensão referida = 62% ou pressão sistólica > 140 e/ou > 90 mm Hg no momento da medida = 38%). Dos que referiram 51% estavam hipertensos no momento da medida. A prevalência foi 17, 23 e 29% (p < 0,05) nos médicos, enfermagem e "outros". Análise univariada mostrou "odds ratio" significante para o sexo masculino, idade > 50 anos, unidade de trabalho para o Instituto de Radiologia e Prédio da Administração, escolaridade 10 anos e índice de massa corporal (IMC) maior ou igual a 30 kg/m2. O modelo de regressão logística com procedimento "stepwise" mostrou associação estatisticamente significante com hipertensão arterial para as variáveis: sexo, idade, cor da pele, renda familiar e IMC. CONCLUSÃO: A prevalência de hipertensão foi alta em funcionários do Complexo Hospital das Clínicas, principalmente nos de ocupação diferente de médico e enfermagem. Os grupos de maior risco (homens, cor preta, baixa renda familiar, obesos) precisam ser orientados quanto a prevenção e diagnóstico precoce da doença através de programas especiais.

Desejo de informação e participação nas decisões terapêuticas em caso de doenças graves em pacientes atendidos em um hospital universitário / Desire of information and participation in therapeutic decisions concerning severe diseases, in patients of a University Hospital

OBJETIVO: Avaliar o desejo de pacientes serem informados sobre diagnóstico de doenças graves, de informação às suas famílias e de participação nas decisões terapêuticas. MÉTODOS: 363 pessoas atendidas no ambulatório ou internadas na enfermaria de um serviço universitário de Clínica Geral foram entrevistadas. O questionário continha perguntas sobre desejo de ser informado e de que familiares também fossem informados em casos de diagnósticos de câncer e síndrome da imunodeficiência adquirida (Aids) e de ser informado e participar de decisões terapêuticas em caso de tumores abdominais. RESULTADOS: Homens (96,1 por cento) e mulheres (92,6 por cento) mostraram desejo de serem informados do diagnóstico de câncer e 87,7 por cento dos homens e 84,2 por cento das mulheres desejaram que sua família também fosse informada; 94,2 por cento dos homens e 91 por cento das mulheres afirmaram querer saber do diagnóstico de Aids. Enquanto 86 por cento das mulheres e 76,6 por cento dos homens mostraram desejo de serem informados das opções terapêuticas em caso de tumor abdominal, apenas 58,5 por cento das mulheres e 39,6 por cento dos homens desejaram opinar sobre o tratamento. O desejo de participar das decisões terapêuticas foi menor nos homens, nas pessoas com mais de 60 anos e em quem estava internado (p<0.05). CONCLUSÕES: A grande maioria da população que procura um hospital universitário deseja ser informada sobre suas condições de saúde, incluindo eventuais diagnósticos de doenças graves. Por outro lado, existem vínculos familiares intensos, sendo que os pacientes desejam, também, que suas famílias sejam informadas.