Diallyl disulfide (DADS) induced apoptosis undergo caspase-3 activity in human bladder cancer T24 cells

Diallyl disulfide (DADS), one of the major components of garlic (Allium sativum), is well known to have chemopreventative activity against human cancer such as colon, lung and skin. But the exact mechanism of the action is still unclear. In this study, we investigated how DADS--induced cell cycle arrest and apoptosis in T24 human bladder cancer cells in vitro. Apoptosis induction, cell viability, cell cycle arrest, caspases-3, -9 activity and gene expression were measured to determine their variation by flow cytometric assay, western blot, and determination of caspase-3 activity, PCR and cDNA microarray. There are significant differences in cell death (decreased viable cells then increased the amounts of apoptosis) of T24 cells that were detected between DADS (5-75 microM) treated and untreated groups. A significant increase was found in apoptosis induction when cells were treated with DADS (50 microM) compared to without DADS treated groups. DADS also promoted caspase-3 activity after exposure for 1, 3, 6, 12, and 24 h, which led to induce apoptosis. DADS also increased the product of intracellular hydrogen peroxide. Furthermore, the DADS-induced apoptosis on T24 cells was blocked by the broad-spectrum caspase inhibitor, z-VAD-fmk and antioxidant (catalase). DADS also increased cyclin E and decreased CDK2 gene expression which may lead to the G2/M arrest of T24 cells.

EEG--a valuable tool in early diagnosis of Angelman syndrome

Angelman Syndrome (happy puppet syndrome) is one of the genetic diseases causing developmental delay in children. Late diagnosis used to be the rule because of delayed appearance of disease markers such as craniofacial dysmorphism, ataxia, unprovoked laughter and seizure. However, reports have described characteristic EEG changes such as 2-3 Hz large amplitude slow wave paroxysms which appear early and are quite specific to the syndrome. With EEG aid, we made very early diagnosis in a 9 month-old young infant. And we would like to advocate the use of EEG study in cryptogenic psychomotor retardation in children.

Psychosocial, substance use, and delinquency differences among Anglo, Hispanic White, and African-American male youths entering a juvenile assessment center

Using data collected on nearly 4,000 Anglo, Hispanic White, and African-American male youths processed at the Hillsborough County Juvenile Assessment Center, we examine their psychosocial, substance use, and other delinquent behavior differences. In extending the results of previous research in a manner consistent with the concept of relative deviance, significant differences in these variables are found across the three groups. Implications of the findings for theory, service delivery, and policy are also considered.

Examination of the reliability of the Problem Oriented Screening Instrument for Teenagers (POSIT) among arrested youths entering a juvenile assessment center

The Problem Oriented Screening Instrument for Teenagers (POSIT) serves as a key aspect of the preliminary screening activities at the Hillsborough County Juvenile Assessment Center. We report on a reliability study of POSIT, involving an examination of the relationships between the youths' initial and second admission POSIT results for different time intervals between administration of the instrument. The results indicate the POSIT provides consistent indication of potentially troubled youths who are in need of in-depth assessment and intervention or treatment services.

Development and evaluation of a classification of high risk youths entering a juvenile assessment center

We report the results of developing and evaluating a classification of high risk youth entering a Juvenile Assessment Center in Hillsborough County, Florida, involving over 2,000 youths processed at the center during its first 8 months of operation. Cluster analysis of the youths' potential problems probed by the Problem Oriented Screening Instrument for Teenagers defined four groups. The usefulness of the typology was supported by a discriminant analysis and by recidivism information. The research implications of these results are discussed.

Predictors of recidivism to a juvenile assessment center

We report the results of a study of the predictors of recidivism to a Juvenile Assessment Center in Hillsborough County, Florida, involving over 2,000 youths processed at the center during its first 8 months of operation. Consistent with previous research, younger aged youths, youths with abuse or neglect histories, with previous arrests for property, violence, or drug offenses, with potential vocational, leisure-recreation, and family problems, or who were arrested on property felony charges were likely to recidivate. The program activity and policy implications of these results are discussed.