The Association Between NRMN STAR Grantsmanship Self-Efficacy and Grant Submission.

Background: Eliminating the NIH funding gap among underrepresented minorities (URMs) remains a high priority for the National Institutes of Health. In 2014, the National Research Mentoring Network Steps Toward Academic Research (NRMN STAR) program recruited postdoctoral, early-stage and junior faculty to participate in a 12-month grant writing and professional development program. The expectation of the program was to increase the number of grant submissions and awards to URM researchers.

The Impact of Grantsmanship Self-Efficacy on Early Stage Investigators of The National Research Mentoring Network Steps Toward Academic Research (NRMN STAR).

The NRMN STAR program was created to address the persistent underrepresentation in grant submissions and receipt of National Institutes of Health (NIH) awards by racial/ethnic minority groups. In our current study, we assessed program impact on trainees' self-efficacy related to grant writing. The program was conducted with two cohorts: one in June 2014 and one in June 2015.

Linear array of multi-substrate tracts for simultaneous assessment of cell adhesion, migration, and differentiation.

Cell migration, which is central to a wide variety of life processes, involves integration of the extracellular matrix (ECM) with the internal cytoskeleton and motor proteins via receptors spanning the plasma membrane. Cell migration can be induced by a variety of signals, including gradients of external soluble molecules, differences in ECM composition, or electrical gradients. Current in vitro methods to study cell migration only test one substrate at a time.

Imbalanced expression of Vcan mRNA splice form proteins alters heart morphology and cellular protein profiles.

The fundamental importance of the proteoglycan versican to early heart formation was clearly demonstrated by the Vcan null mouse called heart defect (hdf). Total absence of the Vcan gene halts heart development at a stage prior to the heart's pulmonary/aortic outlet segment growth. This creates a problem for determining the significance of versican's expression in the forming valve precursors and vascular wall of the pulmonary and aortic roots.

Sox2 up-regulation and glial cell proliferation following degeneration of spiral ganglion neurons in the adult mouse inner ear.

In the present study, glial cell responses to spiral ganglion neuron (SGN) degeneration were evaluated using a murine model of auditory neuropathy. Ouabain, a well-known Na,K-ATPase inhibitor, has been shown to induce SGN degeneration while sparing hair cell function. In addition to selectively removing type I SGNs, ouabain leads to hyperplasia and hypertrophy of glia-like cells in the injured auditory nerves.

Molecular morphology of the chick heart visualized by MALDI imaging mass spectrometry.

Utilization of MALDI-MS (matrix-assisted laser desorption/ionization mass spectrometry) for tissue imaging is a relatively new proteomic technique that simultaneously maps the spatial distribution of multiple proteins directly within a single frozen tissue section. Here, we report the development of a methodology to apply MALDI tissue imaging to chick heart tissue sections acquired from fixed and paraffin-embedded samples. This protocol produces molecular images that can be related to the high-quality histological tissue sections.

iQuantitator: a tool for protein expression inference using iTRAQ.

Background: Isobaric Tags for Relative and Absolute Quantitation (iTRAQ) [Applied Biosystems] have seen increased application in differential protein expression analysis. To facilitate the growing need to analyze iTRAQ data, especially for cases involving multiple iTRAQ experiments, we have developed a modeling approach, statistical methods, and tools for estimating the relative changes in protein expression under various treatments and experimental conditions.

Results: This modeling approach provides a unified analysis of data from multiple iTRAQ experiments and links the observed quantity (reporter ion peak area) to the experiment design and the calculated quantity of interest (treatment-dependent protein and peptide fold change) through an additive model under log transformation.

Is the training of biomedical scientists at a crossroads?

In this commentary, the authors respond to the allegation that the title "scientist" has lost much of its classical meaning because of the highly specialized nature of biomedical graduate training programs that produce "researchers" and "supertechnologists." Scientists, by this definition, have a firm grasp of the historical, philosophical, and biological contexts in which their work exists, whereas their researcher and supertechnologist counterparts are limited by narrowly focused, technologically driven experimentation and data collection with little knowledge or appreciation of the integrated nature of biological systems and the historical basis of discovery. With these definitions in mind, the authors discuss how to ensure that innovative thinking and the ability to integrate molecular knowledge into a higher-order context remain alive and well, complementing today's highly technological environment.

Chick embryos exposed to trichloroethylene in an ex ovo culture model show selective defects in early endocardial cushion tissue formation.

Background: Formation of the primitive heart is a critical step for establishing a competent circulatory system necessary for continued morphogenesis, and as such has significant potential as a target for environmental insult. The goal of this study was to identify the initial cellular events that precede more superficially observable abnormalities resulting from exposing early chick embryos to trichloroethylene (TCE).

Methods: A whole embryo culture method was used to assess the susceptibility of endocardial epithelial-mesenchymal transformation in the early chick heart to TCE.

Immunolocalization of chick periostin protein in the developing heart.

The process that cardiac cushions undergo to form the mature septa and valves of the adult heart is poorly understood. Periostin is an extracellular molecule that is expressed during cushion mesenchyme formation and throughout valvulogenesis. Once thought to be an osteoblast-specific factor, studies have shown this molecule is antiosteogenic.