The validation of an LC-MS/MS method for the quantification of vitamin D metabolites in human milk and their biological variability in Gambian women.

Vitamin D is required for healthy growth and development, but data on human milk vitamin D content is limited. We describe a liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the analysis of vitamin D metabolites in human milk, and its application in samples collected on two consecutive days from women in rural Gambia. Vitamin D compounds were extracted from 1 mL of milk by liquid-liquid extraction and derivatised with 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD) prior to analysis by LC-MS/MS.

Rain Gardens and Rain Gauges: Students Get Hands on With Data While Evaluating Green Infrastructure at Their School.

Two modules were designed for high school science students to investigate the performance of a rain garden installed on school property. The rain garden, a green infrastructure system which allows soil infiltration, was installed to reduce impacts to urban streams and can increase the community's resilience to flooding. By involving students in the analysis of this mitigation strategy, students learned new technical skills, gained varied experiences in collecting and analyzing data, were exposed to new STEM careers, and learned about local issues that impact their community while collaborating with local professionals.

The effect of an acute bout of exercise on circulating vitamin D metabolite concentrations: a randomised crossover study in healthy adults.

The effect of acute exercise on circulating concentrations of vitamin D metabolites is unclear. To address this knowledge gap, we examined the effect of a bout of treadmill-based exercise versus rest on circulating concentrations of 25(OH)D, 25(OH)D, 3-epi-25(OH)D, 24,25(OH)D, 1,25(OH)D, and vitamin D and D in healthy men and women. Thirty-three healthy adults (14 females, 41 (15) years, body mass index 26.

The Impact of Delayed Processing of Chilled Whole Blood Specimens on the Measurement of Nutritional Biomarkers in the United Kingdom National Diet and Nutrition Survey Rolling Programme.

Background: The logistics of timely processing of blood specimens remains a barrier in population health studies to the generation of micronutrient status data.

Objectives: To test a blood specimen processing protocol that includes overnight postage with cooling and its effect on nutritional biomarker concentrations.

Methods: This study was embedded within the United Kingdom National Diet and Nutrition Survey.

Assessment of Erythrocyte Transketolase, Whole Blood Thiamine Diphosphate, and Human Milk Thiamine Concentrations to Identify Infants and Young Children Responding Favorably to Therapeutic Thiamine Administration: Findings from the Lao Thiamine Study, a Prospective Cohort Study.

Background: There is limited information on relationships among biomarkers of thiamine status (whole blood thiamine diphosphate [ThDP], erythrocyte transketolase activity coefficient [ETKac], and human milk thiamine [MTh]) and clinical manifestations of thiamine deficiency.

Objectives: This study aimed to explore correlations among these biomarkers and thiamine responsive disorders (TRDs), a diagnosis based on favorable clinical response to thiamine.

Methods: Hospitalized infants and young children (aged 21 d to <18 mo) with respiratory, cardiac, and/or neurological symptoms suggestive of thiamine deficiency were treated with parenteral thiamine (100 mg daily) for ≥3 d alongside other treatments and re-examined systematically.

ADH1B, the adipocyte-enriched alcohol dehydrogenase, plays an essential, cell-autonomous role in human adipogenesis.

Alcohol dehydrogenase 1B (ADH1B) is a primate-specific enzyme which, uniquely among the ADH class 1 family, is highly expressed both in adipose tissue and liver. Its expression in adipose tissue is reduced in obesity and increased by insulin stimulation. Interference with expression has also been reported to impair adipocyte function.

Quantification and reporting of vitamin D concentrations measured in human milk by LC-MS/MS.

Vitamin D is essential for optimal bone health, and vitamin D deficiency has been associated with an increased risk of adverse pregnancy, growth and developmental outcomes. In early life, and in the absence of endogenous vitamin D production from UVB light, infants are reliant on vitamin D stores established and the vitamin D supply from human milk (HM). However, comprehensive data on vitamin D in HM is lacking.

Sexual Assault Experiences in the Active-Component Army: Variation by Year, Gender, Sexual Orientation, and Installation Risk Level.

To better understand the circumstances surrounding sexual assault in the Army, RAND Arroyo Center researchers created descriptions of active-component soldiers' most serious sexual assault experiences using data from the 2016 and 2018 Workplace and Gender Relations Survey of Active Duty Members. In this study, researchers describe the most common types of behaviors that occurred, characteristics of alleged perpetrators, and times and places in which the experiences occurred. They also explore differences by gender, sexual orientation, and installation risk level.

Implementation of dedicated social worker coaching for emergency medicine residents - Lessons learned.

Emergency medicine training is associated with high levels of stress and burnout, which were exacerbated by the COVID-19 pandemic. The pandemic further exposed a mismatch between trainees' mental health needs and timely support services; therefore, the objective of our innovation was to create an opportunity for residents to access a social worker who could provide consistent coaching. The residency leadership team partnered with our graduate medical education (GME) office to identify a clinical social worker and professionally-trained coach to lead sessions.

How the Dobbs Decision Could Affect U.S. National Security.

Women are an integral part of the military, comprising 17.2 percent of the active-duty force. They are the fastest-growing subpopulation in the military.

The Women's Reproductive Health Survey (WRHS) of Active-Duty Service Members.

The Women's Reproductive Health Survey (WRHS) of active-duty service members represents the first time since the 1990s that the U.S. Department of Defense (DoD) has sponsored a department-wide survey of only service women.

Diversity in U.S. Military Families: An Environmental Scan of the Peer-Reviewed Literature on Race and Ethnic Variation for Select Well-Being Outcomes.

Researchers explore the literature on race and ethnicity (R/E) in relation to U.S. military service member well-being in the areas of mental health, behavioral health, family violence, marital satisfaction, and financial stress to uncover whether past research has focused on R/E differences in outcomes as a driving research question; the variables used to capture R/E; and the quality of research in terms of design, data, and analysis.

Deleterious, protein-altering variants in the transcriptional coregulator ZMYM3 in 27 individuals with a neurodevelopmental delay phenotype.

Neurodevelopmental disorders (NDDs) result from highly penetrant variation in hundreds of different genes, some of which have not yet been identified. Using the MatchMaker Exchange, we assembled a cohort of 27 individuals with rare, protein-altering variation in the transcriptional coregulator ZMYM3, located on the X chromosome. Most (n = 24) individuals were males, 17 of which have a maternally inherited variant; six individuals (4 male, 2 female) harbor de novo variants.

Association between circulating 25-hydroxyvitamin D and cardiometabolic risk factors in adults in rural and urban settings.

Background: An inverse association between vitamin D status and cardiometabolic risk has been reported but this relationship may have been affected by residual confounding from adiposity and physical activity due to imprecise measures of these variables. We aimed to investigate the relationship between serum 25-hydroxyvitamin D (25(OH)D) and cardiometabolic risk factors, with adjustment for objectively-measured physical activity and adiposity.

Methods: This was a population-based cross-sectional study in 586 adults in Cameroon (63.

Movement behaviors associated with mental health among US military service members.

Compared to the general adult population, military service members experience an excess burden of mental health problems (e.g., posttraumatic stress disorder, PTSD).

Interlaboratory comparison of 25-hydroxyvitamin D assays: Vitamin D Standardization Program (VDSP) Intercomparison Study 2 - Part 1 liquid chromatography - tandem mass spectrometry (LC-MS/MS) assays - impact of 3-epi-25-hydroxyvitamin D on assay performance.

An interlaboratory comparison study was conducted by the Vitamin D Standardization Program (VDSP) to assess the performance of liquid chromatography - tandem mass spectrometry (LC-MS/MS) assays used for the determination of serum total 25-hydroxyvitamin D (25(OH)D), which is the sum of 25-hydroxyvitamin D (25(OH)D) and 25-hydroxyvitamin D (25(OH)D). A set of 50 single-donor samples was assigned target values for concentrations of 25(OH)D, 25(OH)D, 3-epi-25-hydroxyvitamin D (3-epi-25(OH)D), and 24R,25-dihydroxyvitamin D (24R,25(OH)D) using isotope dilution liquid chromatography - tandem mass spectrometry (ID LC-MS/MS). VDSP Intercomparison Study 2 Part 1 includes results from 14 laboratories using 14 custom LC-MS/MS assays.

Delayed Processing of Chilled Whole Blood for 24 Hours Does Not Affect the Concentration of the Majority of Micronutrient Status Biomarkers.

Background: The measurement of micronutrient status is essential to understand the health of individuals and populations, but there are limited data on the stability of micronutrients in whole blood.

Objectives: The objective was to investigate the effects of delayed processing of whole blood on the stability of 25 micronutrient and selected clinical biomarkers.

Methods: Blood from 16 healthy adults was collected into EDTA, lithium heparin (LH), or serum tubes.

Use of Electronic Cigarettes and Other Tobacco Products Among Active Component Services Members.

Introduction: e-cigarettes have been touted as a safer alternative to classic cigarettes and other combustible tobacco products. However, a growing body of evidence finds that any risk reduction associated with e-cigarette use is eliminated when individuals use "both" e-cigarettes and other tobacco products. Recent analyses from the Health Related Behaviors Survey suggest that rates of e-cigarette use are higher among active component service members than in the general population.

Increasing the availability and utilization of reliable data on population micronutrient (MN) status globally: the MN Data Generation Initiative.

Micronutrient (MN) deficiencies can produce a broad array of adverse health and functional outcomes. Young, preschool children and women of reproductive age in low- and middle-income countries are most affected by these deficiencies, but the true magnitude of the problems and their related disease burdens remain uncertain because of the dearth of reliable biomarker information on population MN status. The reasons for this lack of information include a limited understanding by policy makers of the importance of MNs for human health and the usefulness of information on MN status for program planning and management; insufficient professional capacity to advocate for this information and design and implement related MN status surveys; high costs and logistical constraints involved in specimen collection, transport, storage, and laboratory analyses; poor access to adequately equipped and staffed laboratories to complete the analyses reliably; and inadequate capacity to interpret and apply this information for public health program design and evaluation.

Associations Between Mental and Physical Health Conditions and Occupational Impairments in the U.S. Military.

Introduction: Prior studies have identified associations between specific health conditions and occupational impairments in the U.S. military, but little is known about the relative magnitude of impairments associated with different mental and physical health conditions among military service members.