Mechanisms that can cause population decline under heavily skewed male-biased adult sex ratios.

While adult sex ratio (ASR) is a crucial component for population management, there is still a limited understanding of how its fluctuation affects population dynamics. To demonstrate mechanisms that hinder population growth under a biased ASR, we examined changes in reproductive success with ASR using a decapod crustacean exposed to female-selective harvesting. We examined the effect of ASR on the spawning success of females. A laboratory experiment showed that the number of eggs carried by females decreased as the proportion of males in the mating groups increased. Although the same result was not observed in data collected over 25 years in the wild, the negative effect of ASR was suggested when success in carrying eggs was considered as a spawning success. These results indicate that a surplus of males results in females failing to carry eggs, probably due to sexual coercion, and the negative effect of ASR can be detected at the population level only when the bias increases because failure in spawning success occurs in part of population. We experimentally examined how male-biased sex ratios affected the maintenance of genetic diversity in a population. The diversity of paternity in a clutch increased with the number of candidate fathers. However, over 50% of a clutch was fertilised by a single male regardless of the sex ratio, and the degree of diversity was less than half of the highest diversity expected in each mating group. We also experimentally examined the mating ability of males during the breeding season. The experiment showed that multiple mating by males could not compensate for the risk that their genotypes would be lost when multiple males competed for one female. These results suggest that a male-biased ASR could trigger a decline of genetic diversity in a population. We show that ASR skewed by female-selective harvesting decreases reproductive success not only of males that have few mating opportunities but also of females. We discuss that we may still underestimate the significance of ASR on population persistence due to the difficulty of revealing the effect of ASR.

Public opinions regarding infertility treatment insurance coverage among marginalized patient populations.

PURPOSE: To assess public support for insurance coverage of infertility treatment among marginalized patient groups. METHODS: A cross-sectional, web survey-based study using a national sample of 1226 US adults. Participants responded to questions measuring their beliefs and attitudes towards support for infertility treatment insurance coverage among specific patient populations. We then evaluated the opinions of only the participants who supported infertility treatment insurance coverage for patients meeting the standard definition of infertility. Associations between demographic data of participants and support for infertility treatment insurance coverage among these marginalized groups were queried. RESULTS: Of the total responses, 61.9% of the respondents generally supported insurance coverage for infertility. Of the total responses, 54.5% did not support any insurance coverage for lesbian, gay, or transgender patients. Of those who generally supported the insurance coverage for infertility, 53.0% supported coverage for gay patients requiring infertility services, 54.6% supported coverage for lesbian patients, and 42.5% supported coverage for transgender patients. Of the total responses, 47.6% did not support insurance for green card holders, undocumented immigrants, or refugees. Of those who supported the insurance coverage for infertility in general, 63.6% supported insurance coverage for patients with green cards, 29.8% for refugees, and 20.7% for undocumented patients. For disability and genetic conditions, 39.5% did not support coverage for any groups. Of those who support the insurance coverage for infertility in general, there was most support for patients with physical disabilities (60.2%) followed by genetic disease (47.9%), then mental disabilities (31.4%). CONCLUSION: Even among those who support insurance coverage for infertility in general, approximately less than half of them supported these same treatments for marginalized groups, including the diverse sexuality and gender (DSG), immigrant, and disabled populations. Increased education and awareness of infertility is needed among the general population to garner acceptance of infertility as a disease and support insurance coverage of infertility treatment for all persons.

Intracytoplasmic sperm injection vs. conventional in vitro fertilization in patients with non-male factor infertility.

OBJECTIVE: To compare the cumulative live birth rates (CLBRs) and cost effectiveness of intracytoplasmic sperm injection (ICSI) and conventional in vitro fertilization (cIVF) for non-male factor infertility. DESIGN: A retrospective cohort study. SETTING: Society for Assisted Reproductive Technology clinics. PATIENT(S): A total of 46,967 patients with non-male factor infertility with the first autologous oocyte retrieval cycle between January 2014 and December 2015. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): The primary outcomes were CLBR, defined as up to 1 live birth from an autologous retrieval cycle between 2014 and 2015, and linked fresh and frozen embryo transfers through 2016. The secondary outcomes included miscarriage rate, 2 pronuclei per oocyte retrieved, and the total number of transferred and frozen embryos. Analyses were performed on subsamples with and without preimplantation genetic testing for aneuploidy (PGT-A). A cost analysis was performed to determine the costs accrued by ICSI. RESULT(S): Among cycles without PGT-A in patients with non-male factor infertility, the CLBR was 60.9% for ICSI cycles vs. 64.3% for cIVF cycles, a difference that was not significantly different after adjustment for covariates (adjusted risk ratio, 0.99; 95% confidence interval, 0.99-1.00). With PGT-A, no difference in CLBR was found between ICSI and cIVF cases after adjustment (64.7% vs. 69.0%, respectively; adjusted risk ratio, 0.97; 95% confidence interval, 0.93-1.01). The patients were charged an estimated additional amount of $37,476,000 for ICSI without genetic testing and an additional amount of $7,213,500 for ICSI with PGT-A over 2 years by Society for Assisted Reproductive Technology clinics. CONCLUSION(S): In patients with non-male factor infertility, ICSI did not improve CLBR. Given the additional cost and the lack of CLBR benefit, our data show that the routine use of ICSI in patients with non-male factor infertility is not warranted.

Description of Vaginal Laxity and Prolapse and Correlation With Sexual Function (DeVeLoPS).

INTRODUCTION: Vaginal laxity (VL) is a sensation of vaginal looseness which may develop after pregnancy and vaginal delivery and may be affected by prior pelvic surgery, menopause and aging. Pelvic organ prolapse (POP) is a disorder in which pelvic organs descend from the normal position. VL has attracted recent attention due to the advent of energy-based treatments for this symptom. AIM: To determine the correlation between VL symptoms and physical exam findings of POP, specifically the introital measurement of genital hiatus. METHODS: This was a multi-center cross-sectional study of sexually active women over 18 years of age with a parity of one or greater. Subjects completed the Vaginal Laxity Questionnaire (VLQ), the Pelvic Floor Distress Inventory-20, and the Female Sexual Function Index (FSFI), and were asked if a sexual partner had commented on laxity. Subjects underwent pelvic exam, including the pelvic organ prolapse quantification (POP-Q). MAIN OUTCOMES MEASURES: Correlation between VL symptoms as measured by the VLQ and POP as measured by elements of the POP-Q. RESULTS: A total of 95 subjects with an average age was 54.3 ± 13.18 years were included. Sixty-three percent of patients were postmenopausal. The average VLQ score was 4.2 ± 1.35 and the average FSFI score was 23.42 out of 36. There was no significant correlation between VLQ score and POP or mid-vaginal caliber. Sensation of vaginal tightness was significantly associated with age (P=0.03) and menopausal status (P=0.04). Only 28% of partners commented on laxity and the majority commented on the vagina being tight (21%) rather than loose (7%). CONCLUSION: VL was not correlated with physical exam findings quantifying POP or sexual function. This study emphasizes the need to develop a more standardized definition of VL and a better assessment tool for VL symptoms. Polland A, Duong V, Furuya R, et al. Description of Vaginal Laxity and Prolapse and Correlation With Sexual Function (DeVeLoPS). Sex Med 2021;9:100443.

A systematic review of neurocognitive dysfunction with overactive bladder medications.

INTRODUCTION AND HYPOTHESIS: The aim of this study is to report cognitive dysfunction with commonly used antimuscarinic overactive bladder medications in patients suffering from overactive bladder disorder with and without baseline neurologic conditions. METHODS: We conducted an Ovid MEDLINE, Embase, and PsycINFO search from January 1998 to December 2018 using PRISMA guidelines. Eighteen studies met the inclusion criteria, including 5 randomized controlled trials and 13 observational studies. RESULTS: Cognitive decline was reported with oxybutynin use (5 of 8 studies) and tolterodine use (4 of 7 studies) among patients with and without baseline cognitive impairment. Oxybutynin use was linked to functional, mental, and behavioral decline among patients with Alzheimer's disease (2 studies). No cognitive decline was detected among patients with and without baseline cognitive impairment taking trospium (6 studies), darifenacin (3 studies), imidafenacin (2 studies), and fesoterodine (1 study). Solifenacin was not associated with cognitive decline (2 studies) but was linked to an increased risk of dementia among patients with diabetes (1 study). CONCLUSION: In this review, cognitive decline was reported with oxybutynin and tolterodine use and should be used with caution in adults over 65 years of age. Solifenacin, fesoterodine, and imidafenacin showed mixed results related to central nervous system effect. Trospium and darifenacin were not associated with cognitive decline among patients with and without baseline cognitive impairment.

Fully automated analysis of OCT imaging of human kidneys for prediction of post-transplant function.

Current measures for assessing the viability of donor kidneys are lacking. Optical coherence tomography (OCT) can image subsurface tissue morphology to supplement current measures and potentially improve prediction of post-transplant function. OCT imaging was performed on donor kidneys before and immediately after implantation during 169 human kidney transplant surgeries. A system for automated image analysis was developed to measure structural parameters of the kidney's proximal convoluted tubules (PCTs) visualized in the OCT images. The association of these structural parameters with post-transplant function was investigated. This study included kidneys from live and deceased donors. 88 deceased donor kidneys in this study were stored by static cold storage (SCS) and an additional 15 were preserved by hypothermic machine perfusion (HMP). A subset of both SCS and HMP deceased donor kidneys were classified as expanded criteria donor (ECD) kidneys, with elevated risk of poor post-transplant function. Post-transplant function was characterized as either immediate graft function (IGF) or delayed graft function (DGF). In ECD kidneys stored by SCS, increased PCT lumen diameter was found to predict DGF both prior to implantation and following reperfusion. In SCD kidneys preserved by HMP, reduced distance between adjacent lumen following reperfusion was found to predict DGF. Results suggest that OCT measurements may be useful for predicting post-transplant function in ECD kidneys and kidneys stored by HMP. OCT analysis of donor kidneys may aid in allocation of kidneys to expand the donor pool as well as help predict post-transplant function in transplanted kidneys to inform post-operative care.

Programmed Death Ligand 1: A Step Toward Immunoscore for Esophageal Cancer.

BACKGROUND: This study sought to evaluate the effect of tumor-infiltrating lymphocyte (TIL) density and programmed death ligand 1 (PD-L1) expression on the prognosis of esophageal cancer. METHODS: Banked tissue specimens from 53 patients who underwent esophagectomies for malignancy at a single institution over a 6-year period were stained for cluster of differentiation 3 (CD3), CD8, and PD-L1. Tumors were characterized as staining high or low density for CD3 and CD8, as well as positive or negative for PD-L1. TIL density and PD-L1 expression were analyzed in the context of survival, recurrence, and perioperative characteristics. RESULTS: Median follow-up was 823 days, with 92.5% survival and 26.8% recurrence rates. All tumors were adenocarcinomas. Neoadjuvant chemotherapy was given in 56.6% of cases, and neoadjuvant radiotherapy was given in 37.7%. High CD3 density was found in 83%, whereas high CD8 density was found in 56.6%. A total of 18.9% of the tumors stained positive for PD-L1. Survival was significantly shorter in Kaplan-Meier analysis for patients with primary tumors staining positive for PD-L1 (log rank: p = 0.05). Multivariable analysis controlling for neoadjuvant therapy, TIL markers, PD-L1, age, and sex found no significant difference in recurrence or survival. CONCLUSIONS: Positive staining for PD-L1 may be a prognostic marker for decreased survival in esophageal adenocarcinoma. Additional TIL cell types should be investigated for creation of an esophageal cancer Immunoscore. PD-L1 has potential as a therapeutic target.

Wakame (Undaria pinnatifida ) modulates hyperphosphatemia in a rat model of chronic renal failure.

In chronic renal failure, inorganic phosphate (Pi) retention speeds up the progression to end-stage renal disease. The current therapy for hyperphosphatemia in patients with chronic renal failure consists of dietary Pi restriction combined with administration of Pi binders, but each therapy has practical problems. Thus, the discovery of foods or nutrients that inhibit Pi absorption may be useful for the treatment of hyperphosphatemia. In the present study, we investigated whether wakame (Undaria pinnatifida) is a useful food for the prevention of hyperphosphatemia in a rat model of renal failure. Feeding a diet containing 5% wakame significantly decreased plasma and urinary Pi levels and increased the amount of fecal Pi. In addition, wakame significantly reduced plasma blood urea nitrogen and plasma Pi levels in 5/6 nephrectomized rats fed a high-Pi diet. Biochemical analyses showed that the reduction of intestinal Pi absorption is the main reason for the decrease in plasma Pi levels in rats fed a diet containing wakame. In addition, feeding alginic acid and fucoidan, major components of wakame fiber, was effective in reducing plasma Pi levels in normal rats. Finally, we concluded that wakame may be a useful food for the prevention of hyperphosphatemia in rodents.

Potency of insect-specific scorpion toxins on mosquito control using Bacillus thuringiensis Cry4Aa.

Two insect-specific scorpion toxins, BjαIT and AahIT were produced as alkali-soluble protein inclusions in Escherichia coli. The inclusion bodies themselves exhibited no toxicity against Culex pipiens larvae. However, coadministration with Cry4Aa toxin enhanced the mosquitocidal activity by 2-3 fold. Insect-specific scorpion toxins can be good supplements for Cry toxin-based bioinsecticides.