Lasting Effects Research Articles

Mastitis has a cumulative and lasting effect on milk yield and lactose content in dairy cows

Milk lactose content (LC) physiologically decreases with parity order in dairy cows, but also after udder health inflammation(s) and/or in presence of elevated milk SCC in subclinical cases. Therefore, the progressive decrease in milk LC observed along cows' productive life can be attributed to a combination of factors that altogether impair the epithelial integrity, resulting in weaker tight junctions, e.g., physiological aging of epithelium, mechanical epithelial stress due to milking, and experienced clinical or subclinical mastitis. Mastitis is known to affect the udder synthesis ability too, so our intention through this study was to evaluate if there is a cumulative and lasting effect of mammary gland inflammation(s) on milk yield (MY) and LC. For this purpose, we used diagnoses of clinical mastitis and milk data of Austrian Fleckvieh cows to evaluate the effect of cumulative mastitis events on LC and MY. Only mastitis diagnoses recorded by trained veterinarians were used. Finally, we investigated if cumulative mastitis is a heritable trait and whether it is genetically correlated with either LC or MY. Estimates were obtained using univariate and bivariate linear animal models. A significant reduction in LC and MY was observed in cows that suffered from mastitis compared with those that did not experience udder inflammation. The h2 of cumulative mastitis is promising and much greater (0.09) than the h2 of the binary event itself (≤0.03). The genetic correlations between cumulative mastitis with LC and MY were negative, suggesting that cows with a great genetic merit for MY and LC are expected to be more resistant to repeated inflammations and less recidivist. When we used number of lifetime SCC peaks (≥200,000 or 400,000 cells/mL) to calculate cumulative inflammation events, h2 was even higher (up to 0.38), implying that also subclinical mastitis has a relevant negative impact on both LC and MY. Finally, the present study demonstrated how repeated mastitis events can permanently affect the mammary gland epithelial integrity and synthesis ability, and that the number of cumulative mastitis is a promising phenotype to be used in selection index in combination with other indicator traits toward more resistant and resilient mammary glands.

Early life antibiotics have lasting effects on the lung epithelium.

Early life antibiotics have lasting effects on the lung epithelium.

Abstract MP25: Buprenorphine pharmacotherapy reduces somatic signs of withdrawal in neonates but may not prevent cardiovascular risk in adult offspring with prenatal fentanyl exposure

Long-term effects on the cardiovascular system of offspring exposed to fentanyl in utero are one of the understudied aspects of the opioid crisis. Previously, we have shown that offspring exposed to opioids in utero display exacerbated somatic signs of withdrawal compared to vehicle-exposed offspring. We also showed that prenatal opioid exposure induce long lasting effects increasing blood pressure (BP) in the adult offspring. Buprenorphine (BUP) is one of the most effective FDA-approved standard-of-care therapies used to treat mothers with opioid use disorder and their newborns with neonatal opioid withdrawal syndrome (NOWS). Yet, long-term effects of BUP in the pediatric population is limited. This study aimed to determine the efficacy of BUP in reducing somatic signs of withdrawal in rat neonates and the long-term effects on BP control. Female Sprague-Dawley rat breeders were implanted with a chronic jugular vein catheter and subjected to 2-hr self-administration (SA) sessions of vehicle (VEH, 0.9% NaCl, n=3) or fentanyl (FEN, 2.5 μg/kg/infusion/lever press, n=3). After rats developed dependence, they were paired during proestrus with males for breeding. SA sessions continued until delivery. There were no changes in maternal weight gain and pup weights at birth. At postnatal day 1, a subset of FEN-SA pups was treated with BUP for 5 consecutive days (1 mg/kg, sc). Video recording was performed daily to quantify somatic signs of withdrawal, including body curls, head movements, and spasms. FEN-SA increased withdrawal at postnatal days 1-3. This effect was attenuated in FEN-SA offspring treated with BUP (p<0.05).14-week-old male offspring were implanted with radiotelemetry (n=4 per group). Compared to VEH-SA, FEN-SA offspring showed: 1) increased BP in response to phenylephrine (PE, 40 µg/kg ip), 2) tachycardic response to 1-hour restraint stress followed by impaired BP recovery (p<0.05, respectively), 3) similar acute responses to AngII (30 µg/kg, sc), 4) exacerbated BP and delayed heart rate recovery in response to acute FEN (20 µg/kg, sc, p<0.05), although plasma clearance was similar between groups. BUP treatment in FEN-SA offspring did not influence acute changes in BP or heart rate to different hypertensive stimuli. Taken together our data suggests that an opioid-based therapy effectively reduced somatic signs of withdrawal; however, it does not seem effective in attenuating the acute and chronic BP responses in prenatal fentanyl-exposed offspring.

Understanding the Impact of Childbirth: Postnatal Stress Symptoms in Psychologically Stable Mothers

This study examines the psychological impact of childbirth on first-time mothers, focusing on post-traumatic stress and depressive symptoms using the Impact of Event Scale (IES) and the Edinburgh Postnatal Depression Scale (EPDS). Many participants experienced intrusive thoughts, avoidance behaviors, and depressive symptoms within the first year postpartum. A strong correlation was found between mothers’ sense of safety and presence during childbirth and lower stress and EPDS scores. Additionally, the duration of Baby Blues was associated with higher IES and EPDS scores, suggesting that early emotional disturbances can have lasting effects on maternal mental health. The study also highlights how recounting birth experiences, either as reliving them or from a present perspective, influences stress levels. These findings underscore the importance of psychological support in postnatal care and advocate for routine screening for negative birth experiences and stress symptoms, emphasizing early intervention to improve maternal and family outcomes. Keywords: postnatal mental health, childbirth experience, maternal stress symptoms

Sexual health after breast cancer: a clinical practice review.

Breast cancer (BC) diagnoses not only present physical challenges but profoundly affect survivors' psychosocial well-being leading to sexual health challenges. This clinical practice review aimed to discuss the current literature and outline the knowledge gaps related to care for sexual health after BC, including survivors' sexual health concerns, as well as available prospective surveillance programs. Current literature on the sexual health challenges of BC survivors was identified and sorted into contributing factors, treatments and interventions, and practice recommendations. This evidence was then used to identify gaps in the literature and make recommendations for future research. BC survivors experience a variety of physical symptoms, such as pain during sex or dyspareunia, which impair sexual well-being. Additionally, dissatisfaction with sexual function may arise due to psychosocial stressors (e.g., depression or body image concerns) and the inverse may worsen psychological well-being. Treatments can have lasting effects that may impact sexual function, often reciprocally related to physical and psychosocial factors. Current treatments for sexual dysfunction involve topical products for vaginal symptoms (e.g., creams, pH-balanced gels, hyaluronic acid or vitamin E suppositories, natural oils, topical estrogen, or lubricants) and various counseling and educational interventions (e.g., mental health counseling, sex therapy, or couples-based psychotherapy). There is a general lack of research considering the ways in which intersectional concerns can impact sexual health experiences after BC. Existing studies do not often consider potential differences in needs that may arise due to ethnicity, age, or socioeconomic background. To address these limitations a significant paradigm shift in survivorship care. This requires moving beyond disease management towards a more holistic, comprehensive, patient-centered approach prioritizing comfort and sexual well-being.

Comparative Three-dimensional Analysis of Facial Lifting Effects across Five Aesthetic Units following Continuous Radiation 115-Watt 6.78-MHz Monopolar Radiofrequency Therapy.

Modern aesthetic trends favor noninvasive facelift procedures, shifting away from traditional surgery. This study explores the three-dimensional evaluation of facial lifting across aesthetic units using the VolNewMer (VNM) device after continuous 115-W 6.78-MHz monopolar radiofrequency (RF) therapy. A cohort of 30 Korean women underwent VNM treatment with a detailed protocol, including energy levels, cooling techniques, and stem cell media application. Lifting amount was analyzed using a three-dimensional scanner with computer program in five specific areas, including the forehead, lateral orbital rim, mid-face, low-face, and neck areas. The changes in Global Aesthetic Improvement Scale for skin texture, tightening, and lifting were surveyed. Immediate and sustained improvement was observed in the mid-cheeks and lower face area. The lifting amount of facial mid-cheek areas was 1.88 ± 0.76 mm, whereas the lifting amount of lower face areas was 1.79 ± 0.91, lateral orbital rim areas was 1.62 ± 0.99, forehead areas was 1.46 ± 1.26, and neck areas was 2.66 ± 1.40 mm immediately after the procedure. The lifting amount of mid-cheek areas was 1.93 ± 0.90 mm, whereas lower face areas was 1.67 ± 1.04, lateral orbital rim areas was 1.58 ± .072, forehead areas was 1.31 ± 0.73, and neck areas was 2.80 ± 0.78 mm 1 month after the procedure. RF treatment is emerging as a recommended noninvasive procedure for facial lifting. VNM-RF treatment showed a significant lifting effect immediately after the procedure, and the lifting effect continued 1 month later (P < 0.05). Global Aesthetic Improvement Scale skin texture was more satisfying 1 month later than immediately after, suggesting a potential correlation with collagen regeneration, indicating a lasting effect over time.

Good Red Dog: The Long Term Economic Impact of Mining Activity in Rural Alaska

While resource booms in rural areas have the potential to transform communities, they also raise questions about the distribution and sustainability of the benefits/costs in both the short and long run. We estimate the long term effects of the Red Dog mine, an Alaska mine in the Northwest Arctic borough, on a variety of economic outcomes. We find suggestive evidence of immediate and long lasting effects of the mine on wages as well as evidence of increases in employment and reductions in government dependence. These findings suggest that even in the absence of pre-conditions to maximize the multiplier effects, the borough’s attempts to internalize the wealth generated by the mine have been successful because of agreements that prioritized local employment and revenues. This model could be potentially be implemented by other rural communities with newfound resource riches.

Maternal immune activation exerts long-term effects on activity and sleep in male offspring mice.

Exposure to infectious or non-infectious immune activation during early development is a serious risk factor for long-term behavioural dysfunctions. Mouse models of maternal immune activation (MIA) have increasingly been used to address neuronal and behavioural dysfunctions in response to prenatal infections. One commonly employed MIA model involves administering poly(I:C) (polyriboinosinic-polyribocytdilic acid), a synthetic analogue of double-stranded RNA, during gestation, which robustly induces an acute viral-like inflammatory response. Using electroencephalography (EEG) and infrared (IR) activity recordings, we explored alterations in sleep/wake, circadian and locomotor activity patterns on the adult male offspring of poly(I:C)-treated mothers. Our findings demonstrate that these offspring displayed reduced home cage activity during the (subjective) night under both light/dark or constant darkness conditions. In line with this finding, these mice exhibited an increase in non-rapid eye movement (NREM) sleep duration as well as an increase in sleep spindles density. Following sleep deprivation, poly(I:C)-exposed offspring extended NREM sleep duration and prolonged NREM sleep bouts during the dark phase as compared with non-exposed mice. Additionally, these mice exhibited a significant alteration in NREM sleep EEG spectral powerunder heightened sleep pressure. Together, our study highlights the lasting effects of infection and/or immune activation during pregnancy on circadian activity and sleep/wake patterns in the offspring.

Impact of the 2022 Infant Formula Shortage on Neonatal Intensive Care Units.

Objective: The aim of this study was to examine effects of the 2022 infant formula shortage as experienced by neonatal intensive care units (NICUs) in the United States, a previously unreported perspective. Methods: A mixed-method approach was utilized. Data were collected using an online survey of NICU medical directors. Quantitative data were analyzed with descriptive statistics and Student's t test. Thematic analysis was utilized to make sense of patterns within the qualitative data. Results: Responses from 139 medical directors were received. Both academic (41.7%) and community (58.3%) NICUs were represented among respondents. Thirty-nine percent of NICU medical directors reported an impact on their unit by the infant formula shortage. Within the qualitative data four themes were revealed as follows: alterations to discharge planning, policy modifications, suboptimal solutions, and extraordinary measures. These themes may inform strategies for mitigation of future infant formula shortages. Conclusions: NICUs were significantly impacted by the infant formula shortage with likely lasting effects. From the reported experiences, clear recommendations have been formed to minimize effects of future infant formula shortages.

Critical gap in practice-lack of attention to falls and possible fall-related post-concussion symptoms in older adults and individuals with neurodegenerative disease.

Falls in older adults and those with neurodegenerative disease (ND) are a current public health hazard and the primary cause of sustaining a mild traumatic brain injury (mTBI)/concussion. Little is known regarding how post-concussion symptoms present in older adults and patients with ND, even though they are the demographic at highest risk. A combination of under-reporting of falls and a lack of awareness regarding potential consequences of falls, results in the underdiagnosis of post-fall issues and concussions in this population. Our aim was to conduct a quality assessment survey to assess physician practice regarding falls and their general knowledge of concussion symptoms. We sent surveys through email to 1400 North American physicians, mostly those working at university affiliated hospitals, who specialized in seeing older adults and patients with ND. One hundred forty-one physicians completed the survey. 71.4% of all responding physicians either never inquired or inquired in less than 5% of their patients with ND or older adult patients, about history of falls. Over half of the physicians (51.8%) either never ask or do not consider it necessary to ask about concussion symptoms post-fall. The majority of physicians (92%) recognized that concussions can have lasting effects on patients, particularly on mood and demonstrated good knowledge of post-concussion symptoms by correctly identifying them. Additionally, more than 70% of responding physicians believed that patients with ND or older adults can fully recover from a concussion with the same probability as any other age group if treated. Only 50% of physicians felt confident in managing post-concussion symptoms themselves, 53.9% of physicians did not know of, or did not have nearby concussion clinics to refer patients to. The gaps in practice are clearly reflective of the gaps in the literature regarding falls and concussions in older adults and ND patients. There is a very low rate of physician inquiry about history of falls and concussion symptoms in older patients and those with NDs. Failure to recognize a concussion, can lead to missed opportunities for targeted interventions to address reversible symptoms. Additionally, the misattribution of post-concussion symptoms to disease progression in older patients or those with NDs may delay and hinder appropriate management.

Negative emotions and marketing retrenchment during crisis: attribution effects through crisis severity and strategic orientations

PurposeEmotions are widely acknowledged decision-making drivers, taking the front seat when managers lack objective information. Existing evidence indicates that negative emotions often lead to the decision to retrench. Contrary to these insights, our research aims to show that negative emotions can sometimes push top managers to withdraw from retrenching marketing activities. By drawing on the affect-as-information approach, this study aims to examine the direct and conditional effects of top managers’ negative emotions on small and medium-sized enteprises (SMEs’) intention to retrench marketing activities during the recent economic crisis caused by the COVID-19 pandemic.Design/methodology/approachThis study uses a descriptive research design and surveys a sample of 155 chief executive officers from business-to-business (B2B) SMEs in Croatia. The authors empirically test the conceptual framework with hierarchical regression.FindingsBased on the sample of 155 top managers of SMEs operating in B2B industries, negative emotions positively drive marketing retrenchment. However, additional insights reveal that this relationship is conditioned by crisis severity and SMEs' strategic orientations (exploration and exploitation). The relationship between negative emotions and marketing retrenchment weakens for SMEs severely hampered by the crisis and for SMEs following the exploitative orientation. In contrast, this relationship becomes stronger for SMEs whose business customers have been severely hampered and for SMEs following exploratory orientation.Originality/valueThis research advances the body of knowledge by demonstrating that, depending on the severity of the crisis and the strategic orientation of the SME, top managers may interpret negative emotions quite differently, which eventually has lasting consequences on marketing retrenchment during crises. Therefore, by focusing on emotional microfoundations and unique crisis- and firm-level contingencies, this study goes beyond existing theoretical discussions that contrast marketing retrenchment vs investment and offers a different understanding of why and when SMEs retrench their marketing activities during crises.

Positive assessment of an autogenous vaccine against pathogenic Escherichia coli in broiler breeders and their progeny in Morocco

Excessive use of antibiotics to control colibacillosis on poultry farms in Morocco contributes to the development of multiresistant avian pathogenic Escherichia coli. Autogenous vaccines are an alternative to antibiotic usage. The main goal of this study was to assess the efficacy of this approach to control recurrent outbreaks of colibacillosis in a large broiler production flow. A tetravalent autogenous vaccine (serotypes O78, O88, O91, and O185) was produced from multiresistant E. coli strains isolated from clinical lesions in breeding hens and used on two farms (65,000 breeding hens in total). On each farm, contemporaneous groups were included: groups vaccinated twice (12 and 18 weeks of age) and unvaccinated control groups. The performances of these flocks, as well as the performances of broilers hatched from these breeders (12 farms, over 600,000 broilers in total), were recorded. A significant reduction in lesion scores, mortality rate and a significant increase in the number of sellable day-old chicks were observed among vaccinated hens. In broilers, body weight at slaughter, lesion scores, feed conversion ratio, mortality, and condemnation rates were significantly improved. This is the first field observation of a lasting effect of breeder hen’s immunization with an autogenous vaccine against E. coli on their offspring.

Regulation of trehalose metabolism mediated by validamycin on chitin synthesis in Spodoptera frugiperda

AbstractTrehalase (TRE) is a key enzyme for degrading trehalose, which plays a vital role in the growth and development of insects. Although validamycin, a compound belonging to a class of efficient antibiotics and fungicides, can control pests by suppressing TRE activities, it remains unknown whether it acts on both trehalose and chitin metabolism in Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), a major pest of maize (Zea mays L., Poaceae). This study investigated the changes in trehalose metabolism after validamycin treatment in S. frugiperda and its effects on the downstream chitin synthesis pathway. Compared with the control, S. frugiperda exhibited varying degrees of mortality after treatment with four concentrations of validamycin, showing a dose‐dependent increase in mortality rate. The mortality rates 24 and 48 h after treatment with 0.07 mg μL−1 validamycin were 35.6% and 42.2%, respectively, indicating the effective lethal concentration. Treatment with 0.07 mg μL−1 validamycin led to developmental delay, abnormal molting, and death in S. frugiperda, but it exerted no lasting effects on the survival rate, pupal weight, and phenotype during its subsequent developmental stages. At 24 h after validamycin treatment, TRE1 and TRE2 activities and glucose content decreased significantly, whereas the trehalose content increased significantly. Treatment with validamycin significantly upregulated TRE1 and TRE2 expression after 24 and 48 h and downregulated the mRNA expression of chitin synthase A and B genes. However, after 72 h, chitin content was not significantly affected. Hence, validamycin can destroy the dynamic transformation balance of trehalose and glucose by inhibiting the activities of the two TREs, and further affect the expression of downstream chitin synthase genes. These findings provide a theoretical basis for using TRE inhibitors to control S. frugiperda.

Advanced Visualization in Minimally Invasive Spine Surgery: The Ergonomics, Economics, and Evolution of Camera-Based Tubes and Retractors.

Tubular spine surgery has emerged as a hallmark of minimally invasive spine (MIS) procedures. In recent years, thanks to technological advances, tubular dilators and retractors have been integrated with digital cameras to allow for ergonomic, high-definition visualization of the surgical field. To detail the evolution, ergonomics, economics, and outcomes of camera-based tubular spine surgery, spanning the origins of MIS tubular techniques to the current use of operative microscopes and tube-mounted digital cameras (TMDCs). This is a narrative review of studies examining the evolution of tubular spine surgery as well as its most recent advances, with a particular emphasis on advances in visualization of the surgical field. Despite early resistance to tubular techniques due to a steep learning curve, minimally invasive tubular approaches are being increasingly adopted by the mainstream spine surgical community, which has resulted in an expansion of both indications and procedural modalities. This can largely be attributed to the increased quality of visualization, as evidenced by improvements in microscopes as well as emerging technologies like exoscopes and TMDCs. Tubular MIS procedures have also achieved superior efficacy compared with open surgical approaches for the treatment of several spinal pathologies while allowing for improved ergonomics, which may have lasting consequences on surgeon longevity. Advances in visualization technologies have allowed tubular surgery to become an effective, ergonomic, and muscle-sparing alternative to open spine surgery. Further research is necessary to quantify the true costs and outcomes associated with nascent TMDC technology. This work elucidates developments in visualization for tubular spine surgery.

Postnatal rearing environment alters pup cues for caregiver-offspring interactions

Maternal behavior experienced in early life provides essential scaffolding to infant psychobiology with life-long effects on neurobiological and behavioral outcomes. However, infants are not passive recipients of caregiving. Evidence in rodents suggests that pups actively contribute to dam-pup interactions by soliciting maternal care with auditory, tactile, and hormonal cues. The limited bedding and nesting material (LBN) rearing manipulation induces changes in maternal care that have been attributed to maternal stress caused by the low-resource environment. The goal of the current study was to determine whether LBN also alters pup cues for maternal behavior, with implications for the mechanism of LBN-induced effects. Rat dams and pups were randomly assigned to LBN or Control rearing conditions on postnatal day (P) 0–6 and pups were fostered to the same or different condition on P6–13. LBN increased pup-directed maternal behaviors measured through 24 h monitoring using machine learning based automated analysis. LBN altered several pup cues known to affect maternal behavior including reducing pup core body temperature, reducing body weight, and altering pup vocalizations on P6 and P12. P6–13 LBN-exposed pups had elevated serum testosterone, which positively correlated with maternal licking and grooming. LBN reduced pup movement between nest attendance onset and the start of nursing, which was negatively related to dam nursing latency and contributed to longer nursing latency in LBN dams. P0–6 pup exposure to LBN also led to longer nest attendance bouts and shorter licking and grooming bouts on P7 and P9, suggesting lasting effects of LBN on pups. These data demonstrate that LBN changes pup behavioral and hormonal signals consistent with eliciting more maternal care, contributing to augmented pup-directed behaviors. This bidirectional interplay may be a critical mechanism involved in the lasting effects of early life environments.

Music Matters – A Qualitative Evaluation of a Nurse-Led, Group-Based Music Program Complementary to Early Intervention for First-Episode Psychosis

First-episode psychosis is a significant mental health condition that can have a profound and lasting effect on an individual’s functional abilities and overall quality of life. While music therapy has shown promise in improving these areas, there is a lack of research exploring the impact of music groups led by mental health professionals without formal music therapy training in the context of early intervention in psychosis. This study aimed to conduct a qualitative evaluation of a once-weekly, 12-week, nurse-led music group, offered as an adjunct to early intervention in young people with first-episode psychosis. The specific objectives were to explore social interaction and experiences of participants and instructors in relation to the music group and provide focus points for implementation in clinical practice. The study utilized Interpretive Description, collecting data through participant observation (6 sessions × 1.5 hrs; 9 hrs in total), key informant interviews (n = 1), and group (n = 4) and email-based (n = 2) interviews. The data was transcribed, thematized, and analyzed using NVivo12 and Interpretive Description inductive analysis resulting in three main themes: Practicalities of the music group, Restored identity, and Music as medicine reflecting the potential of the music group to contribute to a sense of non-patient identity, decreasing symptoms related to mental illness, foster social relationships and a feeling of belonging to a musical community. This study highligts how participation in music groups can be a possible promoter of recovery. However, sustainability appears contingent on the skills and resources of the facilitator (i.e., nurse). Suggestions for a program theory and clinical implications are presented and discussed.

Feeding a Saccharomyces cerevisiae Fermentation Product to Mares in Late Gestation Alters the Biological Activity of Colostrum.

The quality of equine colostrum is typically defined by refractometry or the concentration of maternal antibodies. However, the activity of other equine colostral bioactive molecules has not yet been investigated. This study analyzed whether the administration of a Saccharomyces cerevisiae fermentation product (SCFP) influences the biological activity of mare colostrum and whether the biological activity of colostrum has a lasting immunomodulating effect for foals. A total of fourteen pregnant mares received 20 g/day of a SCFP for a period of twelve weeks prior to the calculated date of birth (SCFP-group). Twelve pregnant mares without supplementation served as controls (CON). Colostral Brix values were determined within three hours after parturition. The concentration of IgG in blood sera and colostrum samples was determined with an ELISA. The biological activity was determined in a cell growth assay with a porcine epithelial cell line (IPEC-J2). Mares (at three weeks before the calculated date of birth) and foals (at the age of 5-8 months) received a parenteral active vaccination against influenza and tetanus. The administration of SCFP did not alter the mare's serum and colostrum IgG concentrations and did not exert a significant influence on the mares' early response to the vaccination. Growth and diarrhea episodes were comparable between foals of supplemented mares (SCFP) and foals of mares without supplementation (CON). Colostrum samples from SCFP-supplemented mares exhibited heightened biological activity. While SFCP and CON foals did not differ in their early response to vaccination, the vaccination-induced alterations in circulating neutrophilic granulocyte numbers were significantly correlated with the biological colostrum activity. These findings suggest that the supplementation of mares in late gestation with SCFP can enhance the biological activity of colostrum, which subsequently influences the innate immune responses of their offspring in later life.

Early social isolation disrupts adult personality expression in group-living mites.

Animal personalities are characterized by intra-individual consistency and consistent inter-individual variability in behaviour across time and contexts. Personalities abound in animals, ranging from sea anemones to insects, arachnids, birds, fish and primates, yet the pathways mediating personality formation and expression remain elusive. Social conditions during the early postnatal period are known determinants of mean behavioural trait expressions later in life, but their relevance in shaping personality trajectories is unknown. Here, we investigated the consequences of early social isolation on adult personality expression in plant-inhabiting predatory mites Phytoseiulus persimilis. These mites are adapted to live in groups. We hypothesized that transient experience of social isolation early in life, that is, deprivation of any social contact during a sensitive window in the post-hatching phase, has enduring adverse effects on adult personality expression. Newly hatched mites were transiently reared in isolation or in groups and tested as adults for repeatability of various within-group behaviours, such as movement patterns and mutual interactions including sociability, defined as the propensity to associate and interact benignly with conspecifics, and activity patterns when alone. Groups composed of individuals with the same or different early-life experiences were repeatedly videotaped and individual behaviours were automatically analysed using AnimalTA. Social experiences early in life had persistent effects on mean behavioural traits as well as adult personality expression, as measured by intraclass correlation coefficients (indicating repeatability). On average, isolation-reared females moved at higher speeds, meandered less, kept greater distances from others and had fewer immediate neighbours than group-reared females. Group-reared females were highly repeatable in inter-individual distance, moving speed, meandering and area explored, whereas isolation-reared females were repeatable only in the number of immediate neighbours. Activity, quantified as the proportion of time spent moving within groups, was only repeatable in group-reared females, whereas activity, quantified as the proportion of time spent moving when alone, was only repeatable in females reared in isolation. Strikingly, also the early-life experiences of male mates influenced personality expression of mated females, with isolation-reared males boosting the repeatability of behavioural traits of group-reared females. Overall, our study provides evidence that a transient phase of social isolation during a critical period early in life has lasting effects that extend into adulthood, impairing adult personality expression. These effects should cascade upward, changing the phenotypic composition and diversity within populations.

Integrating stereotypes and factual evidence in interpersonal communication

Stereotypes can exert a powerful influence on our interactions with others, potentially leading to prejudice when factual evidence is ignored. Here, we identify neuroanatomical and developmental factors that influence the real-time integration of stereotypes and factual evidence during live social interactions. The study uses precisely quantified communicative exchanges in a longitudinal cohort of seventeen-year-olds followed since infancy, testing their ability to moderate stereotype tendencies toward children as contrary evidence accumulates. Our results indicate that the impact of stereotypes on communicative behavior is linked to individual variations in gray matter density and cortical thickness in the right anterior cingulate gyrus. In contrast, the ability to moderate stereotype tendencies is influenced by developmental exposure to social interactions during the initial years of life, beyond the effects of familial environment and later experiences. These findings pinpoint a key brain structure underlying stereotype tendencies and suggest that early-life social experiences have lasting consequences on how individuals integrate factual evidence in interpersonal communication.

Development of loneliness and social isolation after spousal loss: A systematic review of longitudinal studies on widowhood.

Spousal loss is a stressful life event that is associated with loneliness and social isolation, both of which affect mental and physical health. The primary objective of this paper was to synthesize longitudinal studies that investigated loneliness and social isolation in widowhood. A systematic search of the literature was conducted using three electronic databases. 26 longitudinal studies published through June 2024 were included for further analysis. Participant characteristics, study design, and key findings were extracted. Most studies were from the United States or Europe, included more widows than widowers, and assessed loneliness in older adults aged >60 years. Loneliness peaked directly following spousal death, but findings were inconsistent regarding the lasting effects of widowhood. Heterogeneity in the longitudinal trajectories of loneliness was noted, with studies showing linear increases, decreases, or curvilinear relationships over time. Several factors modified the relationship between widowhood and loneliness, including volunteerism, military experience, income, and age. Widowers consistently reported greater loneliness and worse social isolation when compared with widows. Few studies investigated social isolation specifically, but those that did found that social isolation may decrease in widowhood. As the world grapples with a social pandemic of loneliness and social isolation, widowed adults may be uniquely affected. Few studies investigated the longitudinal trajectory of loneliness and especially social isolation in widowhood, and those that did found heterogenous results. Future work is needed to understand why some widowed adults are uniquely affected by feelings of loneliness and social isolation while others are not, and whether potentially modifiable factors that moderate or mediate this relationship could be leveraged by psychosocial interventions.