Auditory hair cells form precise and sensitive staircase-like actin protrusions known as stereocilia. These specialized microvilli detect deflections induced by sound through the activation of mechano-electrical transduction (MET) channels located at their tips. At rest, a small MET channel current results in a constant calcium influx which regulates the morphology of the actin cytoskeleton in the shorter 'transducing' stereocilia.
View Article and Find Full Text PDFAuditory hair cells form precise and sensitive staircase-like actin protrusions known as stereocilia. These specialized microvilli detect deflections induced by sound through the activation of mechano-electrical transduction (MET) channels located at their tips. At rest, a small MET channel current results in a constant calcium influx, which regulates the morphology of the actin cytoskeleton in the shorter 'transducing' stereocilia.
View Article and Find Full Text PDFJ Equine Vet Sci
November 2024
Forage low in nonstructural carbohydrates (NSC) is recommended for insulin dysregulated (ID) horses, indicating the importance of an accurate forage analysis. However, it remains to be fully understood how handling forage samples pre-analysis impacts nutrient values. The objective of this study was to compare the effect of fresh-forage storage-handling methods: microwave-oven (MO; 9kw; 70s then stored at -20℃), room temperature (20℃), 3℃, -20℃, and -80℃.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
August 2024
Regeneration of hyaline cartilage in human-sized joints remains a clinical challenge, and it is a critical unmet need that would contribute to longer healthspans. Injectable scaffolds for cartilage repair that integrate both bioactivity and sufficiently robust physical properties to withstand joint stresses offer a promising strategy. We report here on a hybrid biomaterial that combines a bioactive peptide amphiphile supramolecular polymer that specifically binds the chondrogenic cytokine transforming growth factor β-1 (TGFβ-1) and crosslinked hyaluronic acid microgels that drive formation of filament bundles, a hierarchical motif common in natural musculoskeletal tissues.
View Article and Find Full Text PDFAnthelmintic performance against equine cyathostomins can be evaluated by two different non-terminal measures; the Fecal Egg Count Reduction Test (FECRT) and the Egg Reappearance Period (ERP). Most available FECRT and ERP data have been determined in populations of young horses, and very little information is available from mature and senior horses. Furthermore, it is unknown how commonly occurring equine endocrine disorders such as Insulin dysregulation (ID) and Pituitary pars intermedia dysfunction (PPID) may interfere with these measurements, but it has been suggested that horses with these conditions could be more susceptible to parasitic infections.
View Article and Find Full Text PDFHyperinsulinemia-associated laminitis (HAL) is the primary concern for insulin dysregulated (ID) equids and their insulin response to the consumption of oral, nonstructural carbohydrates (NSC) has been shown to be a risk predictor for HAL development. This randomized, crossover study's objective was to examine the insulinemic responses to 3 forage pellets (1 g/kg BW) (timothy hay, TH, 9.5 % CP & 10 % NSC DM; alfalfa hay, AH, 16.
View Article and Find Full Text PDFBackground: Rural US communities experience health disparities, including a lower prevalence of physical activity (PA). However, "Positive Deviants"-rural communities with greater PA than their peers-exist. The purpose of this study was to identify the factors that help create physically active rural US communities.
View Article and Find Full Text PDFInt J Environ Res Public Health
August 2021
Mexican-heritage children often achieve less physical activity (PA) than their counterparts and are at greater risk for associated comorbidities. Child PA is greatly influenced by their parents, yet researchers have rarely involved fathers in community health promotion. The purpose of this study is to examine Mexican-heritage fathers' perceptions of responsibilities and self-reported activities.
View Article and Find Full Text PDFInt J Environ Res Public Health
July 2021
Background: Rural U.S. adults' prevalence of meeting physical activity (PA) guidelines is lower than urban adults, yet rural-urban differences in environmental influences of adults' PA are largely unknown.
View Article and Find Full Text PDFInt J Environ Res Public Health
December 2020
Despite growing health disparities in Latino populations related to lack of physical activity (PA), little is known regarding the impact of social networks on PA and sedentary behavior among a sample of Latino fathers residing in functionally rural . Fathers wore accelerometers and responded to questions regarding their self-efficacy and characteristics of who they were active with most often. Fathers ( = 47) attained a mean of 73.
View Article and Find Full Text PDFBackground: Current common techniques for repairing calvarial defects by autologous bone grafting and alloplastic implants have significant limitations. In this study, the authors investigated a novel alternative approach to bone repair based on peptide amphiphile nanofiber gels that are engineered to control the release of vascular endothelial growth factor (VEGF) to recruit circulating stem cells to a site of bone regeneration and facilitate bone healing by bone morphogenetic protein-2 (BMP-2).
Methods: VEGF release kinetics from peptide amphiphile gels were evaluated.
Malignant gliomas are heterogeneous neoplasms. Glioma stem-like cells (GSCs) are undifferentiated and self-renewing cells that develop and maintain these tumors. These cells are the main population that resist current therapies.
View Article and Find Full Text PDF: The System for Observing Play and Recreation in Communities (SOPARC) is a valid, reliable method for understanding how people engage in physical activity (PA) in various permanent settings (e.g., parks) and contexts.
View Article and Find Full Text PDFAcross the U.S., Play Streets - temporary street closures creating safe places for play for a few hours- are being implemented in urban areas during summer.
View Article and Find Full Text PDFObjective: Describe the process evaluation of the behavioral intervention group of a multicomponent workplace intervention, BearStand, to reduce employees' sitting time using sit-stand workstations and behavioral strategies.
Methods: Process evaluation metrics: dose delivered, dose-received exposure, dose-received satisfaction, and context were collected using an online survey. Participants included employees of a US university.
Background: Burns are physically debilitating and potentially fatal injuries. The standard-of-care for burn wounds is the coverage with gauze dressings designed to minimize trauma to the regenerating epidermis and dermis during dressing changes. However, deep partial- and full-thickness burns always heal slowly when standard wound care alone is performed.
View Article and Find Full Text PDFABSTRACTWhen Hurricane Harvey landed along the Texas coast on August 25, 2017, it caused massive flooding and damage and displaced tens of thousands of residents of Harris County, Texas. Between August 29 and September 23, Harris County, along with community partners, operated a megashelter at NRG Center, which housed 3365 residents at its peak. Harris County Public Health conducted comprehensive public health surveillance and response at NRG, which comprised disease identification through daily medical record reviews, nightly "cot-to-cot" resident health surveys, and epidemiological consultations; messaging and communications; and implementation of control measures including stringent isolation and hygiene practices, vaccinations, and treatment.
View Article and Find Full Text PDFThe complete mitochondrial genome of a freshwater planorbid snail, (Mollusca, Gastropoda) was recovered from assembly of genomic sequences generated with the Illumina NextSeq500 platform. The mitogenome (14,217 base pairs) is AT rich (72.69%) and comprises 13 protein-coding genes, two ribosomal subunit genes, and 22 transfer RNAs.
View Article and Find Full Text PDFFacial nerve injury can cause severe long-term physical and psychological morbidity. There are limited repair options for an acutely transected facial nerve not amenable to primary neurorrhaphy. We hypothesize that a peptide amphiphile nanofiber neurograft may provide the nanostructure necessary to guide organized neural regeneration.
View Article and Find Full Text PDFThe prevalence of obesity is higher among Hispanic children than among all other ethnicities, and recent efforts have been focused on addressing this growing disparity. The objective of this review was to examine the evidence for interventions designed to reduce obesity in Hispanic children in the first 1000 days of life and to assess and summarize the effectiveness of the interventions. A literature search was conducted using MEDLINE, Scopus, and PubMed.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
September 2017
Muscle stem cells are a potent cell population dedicated to efficacious skeletal muscle regeneration, but their therapeutic utility is currently limited by mode of delivery. We developed a cell delivery strategy based on a supramolecular liquid crystal formed by peptide amphiphiles (PAs) that encapsulates cells and growth factors within a muscle-like unidirectionally ordered environment of nanofibers. The stiffness of the PA scaffolds, dependent on amino acid sequence, was found to determine the macroscopic degree of cell alignment templated by the nanofibers in vitro.
View Article and Find Full Text PDFBiological systems have evolved to utilize numerous proteins with capacity to bind polysaccharides for the purpose of optimizing their function. A well-known subset of these proteins with binding domains for the highly diverse sulfated polysaccharides are important growth factors involved in biological development and tissue repair. We report here on supramolecular sulfated glycopeptide nanostructures, which display a trisulfated monosaccharide on their surfaces and bind five critical proteins with different polysaccharide-binding domains.
View Article and Find Full Text PDFMexican-heritage youth living along the U.S.-Mexico border have higher rates of obesity than non-Hispanic Whites.
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