Iatrogenic and demographic determinants of the national plural birth increase.

OBJECTIVE: To study the contribution of ovulation induction and ovarian stimulation, in vitro fertilization (IVF), and unassisted conception to the increase in national plural births in the United States, a significant contributor to adverse maternal and infant health outcomes. DESIGN: National and IVF-assisted plural birth data were derived from the Centers for Disease Control and Prevention's National Vital Statistics System (1967-2021, after introduction of Clomiphene Citrate in the United States) and the National Assisted Reproductive Technology Surveillance System (1997-2021), respectively. SETTING: Not applicable. PATIENT(S): Not applicable. INTERVENTION(S): Not applicable. MAIN OUTCOME MEASURE(S): In addition to IVF-assisted plural births, the contributions of unassisted conception to plural births among women aged <35 and ≥35 years were estimated using plural birth rates from 1949-1966 and a Bayesian logistic model with race and age as independent variables. The contribution of ovulation induction and ovarian stimulation was estimated as the difference between national plural births and IVF-assisted and unassisted counterparts. RESULT(S): From 1967-2021, the national twin birth rate increased 1.7-fold to a 2014 high (33.9/1,000 live births), then declined to 31.2/1,000 live births; the triplet and higher order birth rate increased 6.7-fold to a 1998 high (1.9/1,000 live births), then declined to 0.8/1,000 live births. In 2021, the contribution of unassisted conception among women aged <35 years to the national plural births was 56.1%, followed by ovulation induction and ovarian stimulation (19.5%), unassisted conception among women aged ≥35 years (16.8%), and IVF (7.6%). During 2009-2021, the contribution of ovulation induction and ovarian stimulation has remained stable, the contribution of unassisted conception among women aged <35 and ≥35 years has increased, and the contribution of IVF has decreased. CONCLUSION(S): Ovulation induction and ovarian stimulation are leading iatrogenic contributors to plural births. They are, therefore, targets for intervention to reduce the adverse maternal and infant health outcomes associated with plural births. Maternal age of ≥35 years is a significant contributor to the national plural birth increase.

Affirmative Action Ruled Unconstitutional: Options for Building a Diverse Health Care Workforce.

This Viewpoint reviews how the recent US Supreme Court decision regarding affirmative action affects extant medical school admission policies seeking to enhance diversity of the national medical student body and its derivative national health care workforce.

Pediatric Drug and Other Shortages in the Age of Supply Chain Disruption.

This Viewpoint lists the top 3 pediatric drugs and product shortages, considers the federal government's and manufacturers' ethical duty to protect children, reviews the causes for the shortages, and suggests policy changes that could help fill in the gap.

Proximity proteomics reveals role of Abelson interactor 1 in the regulation of TAK1/RIPK1 signaling.

Dysregulation of the adaptor protein Abelson interactor 1 (ABI1) is linked to malignant transformation. To interrogate the role of ABI1 in cancer development, we mapped the ABI1 interactome using proximity-dependent labeling (PDL) with biotin followed by mass spectrometry. Using a novel PDL data filtering strategy, considering both peptide spectral matches and peak areas of detected peptides, we identified 212 ABI1 proximal interactors. These included WAVE2 complex components such as CYFIP1, NCKAP1, or WASF1, confirming the known role of ABI1 in the regulation of actin-polymerization-dependent processes. We also identified proteins associated with the TAK1-IKK pathway, including TAK1, TAB2, and RIPK1, denoting a newly identified function of ABI1 in TAK1-NF-κB inflammatory signaling. Functional assays using TNFα-stimulated, ABI1-overexpressing or ABI1-deficient cells showed effects on the TAK1-NF-kB pathway-dependent signaling to RIPK1, with ABI1-knockout cells being less susceptible to TNFα-induced, RIPK1-mediated, TAK1-dependent apoptosis. In sum, our PDL-based strategy enabled mapping of the ABI1 proximal interactome, thus revealing a previously unknown role of this adaptor protein in TAK1/RIPK1-based regulation of cell death and survival.

Urgent Need for Next-Generation COVID-19 Vaccines.

This Viewpoint argues that the development of a distinctly improved generation of SARS-CoV-2 vaccines is paramount to offering a greater breadth and depth of protection for a longer duration against COVID-19 disease.

Valproate Teratogenicity: A Moving Target.

Within several years after receiving U.S. Food and Drug Administration (FDA) approval in the late 1970s, valproate was shown to increase the risk for major congenital malformations and learning disabilities in the offspring of women who used the drug during pregnancy. Nonetheless, its use in pregnant women has persisted for more than four decades, recently resulting in numerous lawsuits and, in countries other than the United States, criminal indictments of the manufacturers of valproate. The use of valproate in pregnancy persisted and extended beyond its original indication for the treatment of epilepsy. Several recent studies indicate that the drug is more often prescribed to treat pregnant women with bipolar depression and migraine than for seizure control. Especially concerning is the absence of valproate from the list of more than 60 drugs for which the FDA has implemented Risk Evaluation and Mitigation Strategies to prevent or limit untoward consequences associated with specific drugs. Until this step is taken, avoidance of the teratogenic effects of valproate will rely on the vigilance of those caring for women and people with the potential to get pregnant.

Activation of autophagy during normothermic machine perfusion of discarded livers is associated with improved hepatocellular function.

Liver transplantation is hampered by a severe shortage of donor organs. Normothermic machine perfusion (NMP) of donor livers allows dynamic preservation in addition to viability assessment before transplantation. Little is known about the injury and repair mechanisms induced during NMP. To investigate these mechanisms, we examined gene and protein expression changes in a cohort of discarded human livers, stratified by hepatocellular function, during NMP. Six human livers acquired through donation after circulatory death (DCD) underwent 12 h of NMP. Of the six livers, three met predefined criteria for adequate hepatocellular function. We applied transcriptomic profiling and protein analysis to evaluate temporal changes in gene expression during NMP between functional and nonfunctional livers. Principal component analysis segregated the two groups and distinguished the various perfusion time points. Transcriptomic analysis of biopsies from functional livers indicated robust activation of innate immunity after 3 h of NMP followed by enrichment of prorepair and prosurvival mechanisms. Nonfunctional livers demonstrated delayed and persistent enrichment of markers of innate immunity. Functional livers demonstrated effective induction of autophagy, a cellular repair and homeostasis pathway, in contrast to nonfunctional livers. In conclusion, NMP of discarded DCD human livers results in innate immune-mediated injury, while also activating autophagy, a presumed mechanism for support of cellular repair. More pronounced activation of autophagy was seen in livers that demonstrated adequate hepatocellular function.NEW & NOTEWORTHY We demonstrate that ischemia-reperfusion injury occurs in all livers during NMP, though there are notable differences in gene expression between functional and nonfunctional livers. We further demonstrate that activation of the liver's repair and homeostasis mechanisms through autophagy plays a vital role in the graft's response to injury and may impact liver function. These findings indicate that liver autophagy might be a key therapeutic target for rehabilitating the function of severely injured or untransplantable livers.

Antibiotics and the Human Microbiome: A Survey of Prescribing Clinicians' Knowledge and Opinions Regarding the Link between Antibiotic-Induced Dysbiosis and Immune-Mediated Disease.

Altered composition or function of the human micro- biome, termed dysbiosis, has been associated with a variety of immune-mediated diseases. Antibiotic use is a well-studied cause of dysbiosis. We conducted an electronic survey of 351 antibiotic-prescribing clinicians in Rhode Island to evaluate antibiotic prescription patterns, knowledge and opinions regarding the importance of the human microbiome and its relation to antibiotics and the immune system. We found that clinicians view the health of the human microbiome as important when prescribing antibiotics; however, they do not feel well-informed or confident in their knowledge about the microbiome or its relevance to patient health. A higher level of self- reported knowledge about the microbiome was associated with increased importance placed on the microbiome and its relevance to medical practice. Our results indicate that clinicians may benefit from continuing medical education on the link between antibiotic-induced dysbiosis and immune-mediated disease.

Self-reported insulin pump prescribing practices in pediatric type 1 diabetes.

INTRODUCTION: Disadvantaged and minority youth with type 1 diabetes are less likely to be on insulin pump therapy compared to the majority population. Little is known about how pediatric endocrinology providers determine eligibility for insulin pump. We aimed to identify provider factors influencing the decision to initiate insulin pump therapy. METHODS: We conducted a survey of Pediatric Endocrine Society members who prescribe insulin pump therapy to pediatric patients with type 1 diabetes. The survey collected information about prescriber characteristics, use and adherence to guidelines, eligibility criteria, and objective and subjective factors that influence insulin pump prescription. RESULTS: The survey was completed by 192 individuals who met eligibility criteria (14.1% response rate). The majority of respondents were attending providers, and were white, non-Hispanic females. A minority of providers (22%) reported following written insulin pump guidelines, and many (70%) reported using personal guidelines to guide patient selection. Most providers had no objective eligibility criteria, aside from standard glucose monitoring. Providers identified patient lifestyle and increased risk of hypoglycemia, as well as patient and family factors such as motivation, realistic expectations of insulin pump use, ability to demonstrate carbohydrate counting, patient request, and ability to communicate as important in the decision to initiate insulin pump. CONCLUSION: Pediatric endocrinology providers place significant importance on subjective factors and utilize few objective criteria in determining eligibility for insulin pump. In the setting of the known disparities in insulin pump use, providers should utilize objective, consistent criteria to determine which patients are safe to initiate insulin pump.

Diversity of the National Medical Student Body - Four Decades of Inequities.

A racially and ethnically diverse health care workforce remains a distant goal, the attainment of which is contingent on the inclusivity of the national medical student body. We examined the diversity of medical school applicants and enrollees over the past four decades with an eye toward assessing the progress made. Data on the gender and race or ethnic group of enrollees in all medical doctorate degree-granting U.S. medical schools from 1978 through 2019 were examined. The percentage of female enrollees doubled during this period, and women now constitute more than half the national medical student body. This upturn has been attributed largely to an increase by a factor of 12 in the enrollment of Asian women. The corresponding decrease in the percentage of male enrollees, most notably White men, was offset by an increase by a factor of approximately 5 in the enrollment of Asian men. The percentages of enrollees from Black, Hispanic, and other racial and ethnic groups that are underrepresented in medicine remain well below the percentages of these groups in the national Census.

Mitochondrial genotype alters the impact of rapamycin on the transcriptional response to nutrients in Drosophila.

BACKGROUND: In addition to their well characterized role in cellular energy production, new evidence has revealed the involvement of mitochondria in diverse signaling pathways that regulate a broad array of cellular functions. The mitochondrial genome (mtDNA) encodes essential components of the oxidative phosphorylation (OXPHOS) pathway whose expression must be coordinated with the components transcribed from the nuclear genome. Mitochondrial dysfunction is associated with disorders including cancer and neurodegenerative diseases, yet the role of the complex interactions between the mitochondrial and nuclear genomes are poorly understood. RESULTS: Using a Drosophila model in which alternative mtDNAs are present on a common nuclear background, we studied the effects of this altered mitonuclear communication on the transcriptomic response to altered nutrient status. Adult flies with the 'native' and 'disrupted' genotypes were re-fed following brief starvation, with or without exposure to rapamycin, the cognate inhibitor of the nutrient-sensing target of rapamycin (TOR). RNAseq showed that alternative mtDNA genotypes affect the temporal transcriptional response to nutrients in a rapamycin-dependent manner. Pathways most greatly affected were OXPHOS, protein metabolism and fatty acid metabolism. A distinct set of testis-specific genes was also differentially regulated in the experiment. CONCLUSIONS: Many of the differentially expressed genes between alternative mitonuclear genotypes have no direct interaction with mtDNA gene products, suggesting that the mtDNA genotype contributes to retrograde signaling from mitochondria to the nucleus. The interaction of mitochondrial genotype (mtDNA) with rapamycin treatment identifies new links between mitochondria and the nutrient-sensing mTORC1 (mechanistic target of rapamycin complex 1) signaling pathway.