Although a series of second generation antipsychotics (SGAs) (e. g., risperidone, olanzapine and quetiapine) have been developed in the past two decades, clinical reports do not necessarily show advantages over first generation antipsychotics (FGAs) in the treatment of schizophrenia, especially in their efficacy against cognitive impairment and ability to cause extrapyramidal side effects (EPS). Recently, Cl-amidine several lines of studies have revealed therapeutic roles of 5-HT receptors in modulating cognitive impairments and extrapyramidal motor disorders. Specifically, inhibition of 5-HT1A, 5-HT3 and 5-HT6 receptors or activation of 5-HT4 receptors alleviates cognitive impairments (e. g., deficits in learning and memory).

In addition, stimulation

of 5-HT1A receptors or inhibition of 5-HT3 and 5-HT6 receptors as well as 5-HT2A/2C receptors can ameliorate extrapyramidal motor disorders. Thus, PD173074 controlling the activity of 5-HT1A, 5-HT3 or 5-HT6 receptors seems to provide benefits by both alleviating cognitive impairments and reducing antipsychotic-induced EPS. This article reviews the functional roles and mechanisms of 5-HT receptors in the treatment of schizophrenia, focusing on the serotonergic modulation of cognitive and extrapyramidal motor functions, and illustrates future therapeutic strategies.”
“Aberrations of p53 occur in most, if not all, human cancers. In breast cancer, p53 mutation is the most common genetic defect related to a single gene. Immortalized human mammary epithelial cells resemble the earliest forms of aberrant breast tissue growth but do not express many malignancy-associated phenotypes. We created a model of human mammary epithelial tumorigenesis by infecting hTERT-HME1 immortalized human mammary VS-4718 epithelial cells expressing wild-type p53 with four different mutant p53 constructs to determine the role of p53 mutation on the evolution of tumor phenotypes. We demonstrate that different mutant/wild-type p53

heterozygous models generate loss of function, dominant negative activity, and a spectrum of gain of function activities that induce varying degrees of invasive potential. We suggest that this model can be used to elucidate changes that occur in early stages of human mammary epithelial tumorigenesis. These changes may constitute novel biomarkers or reveal novel treatment modalities that could inhibit progression from primary to metastatic breast disease.”
“The presence of sulfide/polysulfide redox couple is crucial in achieving stability of metal chalcogenide (e.g., CdS and CdSe)-based quantum dot-sensitized solar cells (QDSC). However, the interfacial charge transfer processes play a pivotal role in dictating the net photoconversion efficiency. We present here kinetics of hole transfer, characterization of the intermediates involved in the hole oxidation of sulfide ion, and the back electron transfer between sulfide radical and electrons injected into TiO2 nanoparticles.