Alterations in chromatin structure and function, including changes in levels or distribution of histone lyine methylation markings and other epigenetic regulators of gene expression could affect neuronal signaling in schizophrenia and other major psychiatric disease. However, to date, nothing is known about the regulation of neuronal and other cell-type specific epigenomes in human or animal brain. Here, we provide first insights into the genome-wide distribution of trimethylated histone H3K4 (H3K4me3), a histone mark associated with actual or potential transcription, in neuronal nuclei collected postmortem from prefrontal cortex (PFC) across a wide age range (0.5-70years). Massively parallel sequencing identified 16,000-22,000 H3K4me3 enriched regions (peaks), the majority located proxima…

Dr. Stephen Wong has received a $5 million gift from the Ting Tsung and Wei Fong Chao Foundation to study progressive neurodegenerative diseases including Alzheimer’s Disease. The gift will support The Ting Tsung and Wei Fong Chao Center for Bioinformatics Research and Imaging for Neurosciences (BRAIN) at The Methodist Hospital Research Institute… (Source: Alzheimer’s / Dementia News From Medical News Today)

Dr. Stephen Wong has received a $5 million gift from the Ting Tsung and Wei Fong Chao Foundation to study progressive neurodegenerative diseases including Alzheimer’s Disease. The gift will support The Ting Tsung and Wei Fong Chao Center for Bioinformatics Research and Imaging for Neurosciences (BRAIN) at The Methodist Hospital Research Institute. Neurodegenerative diseases affect one in five Americans. According to a 2010 study by the Alzheimer’s Organization, 5.3 million people have Alzheimer’s at a cost of approximately $172 billion per year… (Source: Health News from Medical News Today)

Conclusions:
We find that comparisons of different learning principles using the same a-priori information can lead to conclusions different from those of previous studies in which the effect resulting from different priors has been neglected. We implement the derived prior is implemented in the open-source library Jstacs to enable an easy application to comparative studies of different learning principles in the field of sequence analysis. (Source: BMC Bioinformatics – Latest articles)

Conclusions:
We presented a method that is able to identify small molecules from tandem MS measurements, even without spectral reference data or a large set of fragmentation rules. With today’s massive general purpose compound libraries we obtain dozens of very similar candidates, which still allows a confident estimate of the correct compound class. Our tool MetFrag improves the identification of unknown substances from tandem MS spectra and delivers better results than comparable commercial software. MetFrag is available through a web application, web services and as java library. The web frontend allows the end-user to analyse single spectra and browse the results, whereas the web service and console application are aimed to perform batch searches and evaluation. (Source: BMC Bioinforma…

Conclusions:
The pool of suboptimal pairwise protein sequence alignments substantially overlaps structure-based alignments for pairs with statistically significant similarity, and a regression model based on information contained in this alignment pool improves the accuracy of pairwise alignments with respect to structure-based alignments. (Source: BMC Bioinformatics – Latest articles)div id=medwormpbiMedWorm Message:/i/b Get the very latest Swine Flu news via the MedWorm ba href=http://www.medworm.com/rss/search.php?qu=%2Bswine+%2B%28influenza+flu%29t=Swine+Fluf=infectiousdiseasesr=Anyo=d target =_selfSwine Flu RSS news feed/a/b – updated hourly from thousands of authoritative health and news sources./p/div

Noise disturbances and time delays are frequently met in cellular genetic regulatory systems. This paper is concerned with the disturbance analysis of a class of genetic regulatory networks described by nonlinear differential equation models. The mechanisms of genetic regulatory networks to amplify (attenuate) external disturbance are explored, and a simple measure of the amplification (attenuation) level is developed from a nonlinear robust control point of view. It should be noted that the conditions used to measure the disturbance level are delay-independent or delay-dependent, and are expressed within the framework of linear matrix inequalities, which can be characterized as convex optimization, and computed by the interior-point algorithm easily. Finally, by the proposed method, a num…

Axotrophin/MARCH-7 was first identified in mouse embryonic stem cells as a neural stem cell gene. Using the axotrophin/MARCH-7 null mouse, we discovered profound effects on T lymphocyte responses, including 8-fold hyperproliferation and 5-fold excess release of the stem cell cytokine leukemia inhibitory factor (LIF). Our further discovery that axotrophin/MARCH-7 is required for targeted degradation of the LIF receptor subunit gp190 implies a direct role in the regulation of LIF signaling. Bioinformatics studies revealed a highly conserved RING-CH domain in common with the MARCH family of E3-ubiquitin ligases, and accordingly, axotrophin was renamed MARCH-7. To probe protein expression of human axotrophin/MARCH-7, we prepared antibodies against different domains of the protein. Each antib…

MicroRNAs (miRs) have been reported to play a critical role in muscle differentiation and function. The purpose of this study is to determine the role of miRs during smooth muscle cell (SMC) differentiation from embryonic stem cells (ESCs). MicroRNA profiling showed that miR-10a expression is steadily increased during in vitro differentiation of mouse ESCs into SMCs. Loss-of-function approaches using miR-10a inhibitors uncovered that miR-10a is a critical mediator for SMC lineage determination in our retinoic acid-induced ESC/SMC differentiation system. In addition, we have documented for the first time that histone deacetylase 4 is a novel target of miR-10a and mediates miR-10a function during ESC/SMC differentiation. To determine the molecular mechanism through which retinoic acid induce…