The impact of social distancing measures on anti-JC virus serostatus changes before and during the COVID-19 pandemic in US patients with multiple sclerosis.

BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic offered an epidemiological opportunity to evaluate if isolation and masking affected John Cunningham (JC) virus transmission. OBJECTIVE: This study aimed to assess the proportion of natalizumab-treated patients who converted to a positive anti-JCV antibody serostatus before and during the pandemic. METHODS: Data from TYSABRI Outreach: Unified Commitment to Health (TOUCH) for 22,375 US patients treated with natalizumab with anti-JCV antibody records were assessed in epochs annually from 2017 to 2022. RESULTS: Pre-pandemic anti-JCV antibody serostatus change was observed for 7.4%-7.7%. During the first and second years of the pandemic, 7.3% and 7.2% of patients' serostatus changed, respectively. CONCLUSION: The proportion of patients with anti-JCV antibody serostatus change did not significantly differ during the first 2 years of the pandemic compared with prior years. In contrast to seasonal influenza, masking and social distancing had no discernable effect on JCV serostatus change.

Primate richness and abundance is driven by both forest structure and conservation scenario in Costa Rica.

Variation in tropical forest management directly affects biodiversity and provisioning of ecosystem services on a global scale, thus it is necessary to compare forests under different conservation approaches such as protected areas, payments for ecosystem services programs (PES), and ecotourism, as well as forests lacking any formal conservation plan. To examine the effectiveness of specific conservation approaches, we examined differences in forest structure and tree recruitment, including canopy cover; canopy height; seedling, sapling, and adult tree density; and average and total diameter at breast height (DBH) across 78 plots in 18 forests across Costa Rica representing protected areas, private forests utilizing PES and/or ecotourism, and private forests not utilizing these economic incentives. The effectiveness of conservation approaches in providing suitable primate habitat was assessed by conducting broad primate census surveys across a subset of eight forests to determine species richness and group encounter rate of three primate species: mantled howler monkey (Alouatta palliata), Central American spider monkey (Ateles geoffroyi), and the white-faced capuchin monkey (Cebus imitator). Only canopy height was significantly different across the three approaches, with protected areas conserving the tallest and likely oldest forests. Canopy height was also significantly associated with the group encounter rate for both mantled howler and spider monkeys, but not for capuchins. Total group encounter rate for all three monkey species combined was higher in incentivized forests than in protected areas, with capuchin and howler monkey group encounter rates driving the trend. Group encounter rate for spider monkeys was higher in protected areas than in incentivized forests. Incentivized conservation (PES and ecotourism) and protected areas are paragons of land management practices that can lead to variation in forest structure across a landscape, which not only protect primate communities, but support the dietary ecologies of sympatric primate species.

Analysis of Pregnancy Outcomes Following Exposure to Intramuscular Interferon Beta-1a: The AVONEX® Pregnancy Exposure Registry.

BACKGROUND AND OBJECTIVES: There is a lack of well-controlled US studies of intramuscular (IM) interferon beta (IFNß)-1a use in pregnant women with multiple sclerosis; however, in the European Medicines Agency region, IFNß formulations may be considered during pregnancy if clinically needed based on data from European Union cohort registries. The AVONEX Pregnancy Exposure Registry was established to prospectively study the effects of IM IFNß-1a on the risk of birth defects and spontaneous pregnancy loss in a US population. METHODS: Pregnant women with multiple sclerosis exposed to IM IFNß-1a within ~ 1 week of conception or during the first trimester were included. Participants were followed until there was a pregnancy outcome, live-born infants were followed until age 8-12 weeks. Data were collected on IM IFNß-1a exposure, demographics, patient characteristics, medical history, and pregnancy outcomes, including live births (with or without birth defect), spontaneous abortions/miscarriages and fetal death/stillbirth, elective abortions (with and without birth defect), and ectopic pregnancies. A population-based birth defect surveillance program, the Metropolitan Atlanta Congenital Defects Program (MACDP), served as the primary external control group for evaluating the risk of birth defects. RESULTS: Three-hundred and two patients with a median (range) age of 31.0 (16-48) years and a median (range) gestational age at the time of enrollment of 10.1 (4-39) weeks were evaluable. Most patients (n = 278/302; 92%) reported IM IFNß-1a exposure in the week before conception and most (n = 293/302; 97%) discontinued treatment before the end of the first trimester. Of 306 pregnancy outcomes, there were 272 live births, 28 spontaneous abortions of 266 pregnancies enrolled before 22 weeks' gestation (rate 10.5%; 95% confidence interval 7.2-15.0), five elective abortions, and one stillbirth. There were 17 adjudicator-confirmed major birth defects of 272 live births (rate 6.3%; 95% confidence interval 3.8-10.0); the pattern of birth defects observed was not suggestive of a relationship to prenatal IM IFNß-1a exposure. CONCLUSIONS: This large US registry study suggests IM IFNß-1a exposure during early pregnancy was not clinically associated with adverse pregnancy outcomes in women with multiple sclerosis. These findings help inform clinicians and patients in weighing the risks and benefits of IM IFNß-1a use during pregnancy. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov: NCT00168714, 15 September, 2005.

Elevated glucocorticoids during the ovarian follicular phase predict conception in wild female chacma baboons.

Mating related behavior during ovarian cycling can be energetically demanding and constitute a significant stressor, requiring physiological responses to mediate investment in reproduction. To better understand the proximate mechanisms underlying these responses, we examine hormonal and behavioral variation across the ovarian cycle during conceptive and nonconceptive cycles in wild female chacma baboons (Papio ursinus). We quantified immunoreactive fecal estradiol, progesterone, and cortisol metabolites for 21 adult females, and calculated activity budgets and rates of received aggression from over 5000 15-min behavioral samples. We found conception to be associated with higher concentrations of both estradiol and cortisol during the follicular phase, but no difference in progesterone between conceptive and nonconceptive cycles for either the follicular or luteal phase. While females spent less time feeding during the follicular compared to the luteal phase, we found no difference in time spent feeding, moving, or copulating between conceptive and nonconceptive cycles of the same phase. Rates of received aggression also were similar across the ovarian cycle, with no difference between conceptive and nonconceptive cycles. Finally, we found positive associations between cortisol and estradiol, indicating that glucocorticoids (GCs) do not suppress hypothalamic-pituitary-gonadal (HPG) activity and reproductive function in this context. Overall, our results suggest that elevated GCs may play an adaptive role in mobilizing energy during sexually receptive periods of ovarian cycling.

Weight perception among US adults predicts cardiovascular risk when controlling for body fat percentage.

OBJECTIVES: Previous research has revealed that increased obesity prevalence in the US has occurred in concert with an increase in those in overweight and obese BMI categories perceiving their weight as "about right" since the 1980s. Using biological normalcy as a framework, we assess whether individual weight perception is related to the risk of cardiovascular disease (CVD) when controlling for body fat percentage (BF%). METHODS: Data from the National Health and Nutrition Examination Survey (1999-2006) included weight perception, BF%, covariates, and variables to calculate Framingham Risk Score (CVD risk) among 9489 US Americans aged 20-79 years. RESULTS: Logistic regression revealed that those perceiving themselves to be "overweight" had a significantly higher cardiovascular risk score compared to those considering their weight to be "about right" (OR = 1.54; 95% CI = 1.12-2.11, P = .008) after controlling for BF%, age, gender, ethnicity, poverty-index-ratio, education, family history of myocardial infarction, smoking status, and physical activity. CONCLUSIONS: Perceiving one's own weight as "overweight" was significantly associated with increased 10-year risk of a cardiovascular event when compared to those perceiving their weight to be "about right," regardless of body composition. This suggests that recent changes in normative beliefs in response to increased obesity prevalence over the past several decades could play a role in the distribution of CVD risk in the US, whereby perceiving oneself as "about right" rather than "overweight" may result from decreases in internalization of fat stigma.

Sex Differences in Motivation to Self-Administer Alcohol After 2 Weeks of Abstinence in Young-Adult Heavy Drinkers.

BACKGROUND: Studies in animal models document that forced abstinence from usual consumption of alcohol changes subsequent seeking and consumption, with increases or decreases depending on the species, duration of abstinence, number of deprivations, and sex. Human laboratory-based alcohol deprivation studies are rare. METHODS: We conducted a 2-session, within-participant, randomized-order comparison of intravenous, progressive ratio, alcohol self-administration during 2.5 hours of progressive work for alcohol and/or vehicle; once while the participants pursued their usual drinking habits and once after 2 weeks of closely monitored, voluntary outpatient abstinence from alcohol. The schedule of work for rewards and the incremental increases in breath alcohol concentration following completion of an alcohol work-set were identical across participants. Fifty young-adult (27 men), heavy-drinking participants completed both sessions. Our primary hypothesis was that motivation to work for alcohol after 2 weeks of abstinence would be greater in participants with a weekly binge pattern of drinking, compared to those who regularly drink heavily, and we intended to explore associations with biological family history of alcoholism and sex. RESULTS: We detected no change in work for alcohol associated with recent drinking history. However, females, on average, increased their work for alcohol upon resumption after 2 weeks of abstinence (mean ± SEM = +16.3 ± 9.6%), while males decreased that work (-24.8 ± 13.8%). The sex difference was substantial and significant (p < 0.03), with a medium effect size (Cohen's d = 0.63). CONCLUSIONS: We believe a more comprehensive study of mechanisms underlying the sex differences in the human postabstinence response is warranted.

Evolving possibilities: Post-embryonic axial elongation in salamanders with biphasic (Eurcyea cirrigera, E. longicauda, E. quadridigitata) and paedomorphic life cycles (Eurycea nana and Ambystoma mexicanum). Submitted Acta Zoologica.

Typically the number of vertebrae an organism will have post-embryonically is determined during embryogenesis via the development of paired somites. Our research investigates the phenomenon of post-embryonic vertebral addition in salamander tails. We describe body and tail growth, and patterns of postsacral vertebral addition and elongation in context with caudal morphology for four plethodontids (Eurycea), and one ambystomatid. Eurycea nana and A. mexicanum have paedomorphic life cycles; E. cirrigera, E. longicauda and E. quadridigitata are biphasic. Specimens were collected, borrowed and/or purchased, and cleared and stained for bone and cartilage. Data collected include snout-vent length (SVL), tail length (TL), vertebral counts and centrum lengths. Eurycea species with biphasic life cycles had TLs that surpassed SVL following metamorphosis. Tails in paedomorphic species elongated but rarely exceeded body length. Larger TLs were associated with more vertebrae and longer vertebrae in all species. We observed that rates of postsacral vertebral addition varied little amongst species. Regional variation along the tail becomes prominent following metamorphosis in biphasic developers. In all species vertebrae in the posterior one-half of the tail taper towards the tip. We suggest a developmental link might exist between the ability to continually add vertebrae and regeneration in salamanders.

Challenging two mental illness stigmas: personal responsibility and dangerousness.

Two stigmatizing attitudes related to dangerousness and personal responsibility may undermine the opportunities of persons with serious mental illness. This study set out to examine path models that explain how these attitudes lead to discriminatory behavior and to assess the impact of antistigma programs on components of personal responsibility and dangerousness models. Two hundred thirteen persons were randomly assigned to one of five antistigma conditions: education on personal responsibility, education on dangerousness, contact with a person with serious mental illness where personal responsibility is discussed, contact where dangerousness is discussed, or no change. Persons completed an attribution questionnaire (AQ) representing personal responsibility and dangerousness path models at pretest, posttest, and 1-week followup. They also completed tasks that represented helping behavior. Goodness of fit indexes from linear structural modeling were mixed for both models but suggested that fear of dangerousness was a key attitude leading to discriminatory behavior. Results also showed that subjects who had contact with persons with serious mental illness experienced greater changes than subjects in the education or control groups did on measures of attribution and helping behavior.