Oxytocin Levels Research Articles

Effectiveness of Rose and Jasmine Aromatherapy on The Phase 1 Labor Duration in Intrapartum Mothers at Aisyiyah General Hospital, Kudus, Central Java

Background: Unhandled prolonged labor can cause death for the mother and baby. Prolonged labor is caused by inadequate contraction. Uterotonics and aromatherapy can improve the contraction. Rose and jasmine aromatherapy increase oxytocin level and aid the birth process. This study aims to compare the effectiveness of rose and jasmine aromatherapy on duration of labor in women in the first stage of labor at Aisyiyah Hospital Kudus. Subject and Methods: This research was a true experimental study with posttest-only control group design. The number of samples was determined using simple random sampling. The number of samples was 45 respondents (15 rose aromatherapy, 15 jasmine aromatherapy, 15 control). Aromatherapy (1-3%) was given through diffuser for 30 minutes. Each respondent who had prolonged labor was given aromatherapy during first stage of labor, then the duration of labor was measured. The data was analyzed using Kruskal-Wallis test. Results: In the normality test by Shapiro-Wilk test, the value of p=0.006 (p<0.05), which means that the data is not normally distributed. Homogeneity test with the Lavene test yields p=0.044 (p<0.05) which indicates that the variance of data is not homogeneous. Then continued with the Kruskal-Walls test, it was found that there was no significant difference in the effectiveness of giving rose aromatherapy, jasmine aromatherapy and standard treatment on the duration of labor in women with prolonged labor (p=0.104). Conclusion: There was no significant difference in the labor duration in rose, jasmine and control groups. Keywords: Rose Aromatherapy, Jasmine Aromatherapy, Duration of Labor, First Stage of Labor Correspondence: Lilik Asmawati, Master of Applied Midwifery Poltekkes Kemenkes Semarang. Jl. Tirto Agung, Pedalangan, Banyumanik, Semarang, Central Java 50268. Email: lilik.asmawati23@gmail.com Mobile Phone : 0821-3324-4814.

Calm Contact Technique Based on the Endocrinological Mechanism of Hypnosis-A Theoretical Proposal.

This paper proposes the "calm contact" technique: an imaginative scenario where someone is in gentle contact with a loved one where the essence of the experience is to enjoy safety and calmness in peaceful social contact. The theoretical background is outlined by combining the brain mechanisms of stress reactions and hypnosis. In addition to the ancient stress responses (flight or fight or freeze), there are oxytocin-based options at the human level: tend and befriend behavior and the state of calm and connection, which is not a stress reaction but a resting reaction. These social-based reactions could prevent the organism from the primitive freezing response. Some studies proved that "hypnosis" as a setting reduces cortisol levels and could raise oxytocin levels. The beneficial mechanisms of the "calm contact" technique are analyzed in relation to "social support" and the psychoaffective effects of central oxytocin. The subjective effects of the proposed technique are outlined based on reports of healthy volunteers. The "calm contact" technique could be an alternative or adjunct to the "safe place" technique, applying the recent findings of endocrinological brain mechanisms of hypnosis. Clinical implications and limitations are briefly summarized.

Early life adversity in primates: Behavioral, endocrine, and neural effects

BackgroundEvidence suggests that early life adversity is associated with maladaptive behaviors and is commonly an antecedent of stress-related psychopathology. This is particularly relevant to rearing in primate species as infant primates depend on prolonged, nurturant rearing by caregivers for normal development. To further understand the consequences of early life rearing adversity, and the relation among alterations in behavior, physiology and brain function, we assessed young monkeys that had experienced maternal separation followed by peer rearing with behavioral, endocrine and multimodal neuroimaging measures. Methods50 young rhesus monkeys were studied, half of which were rejected by their mothers and peer reared, and the other half were reared by their mothers. Assessments were performed at approximately 1.8 years of age and included: threat related behavioral and cortisol responses, cerebrospinal fluid (CSF) measurements of oxytocin and corticotropin releasing hormone (CRH), and multimodal neuroimaging measures (anatomical scans, resting functional connectivity, diffusion tensor imaging, and threat-related regional glucose metabolism). ResultsThe results demonstrated alterations across behavioral, endocrine, and neuroimaging measures in young monkeys that were reared without their mothers. At a behavioral level in response to a potential threat, peer reared animals engaged in significantly less freezing behavior (p = 0.022) along with increased self-directed behaviors (p < 0.012). Levels of oxytocin in the CSF, but not plasma, were significantly reduced in the peer reared animals (p = 0.019). No differences in plasma cortisol or CSF CRH were observed. Diffusion tensor imaging revealed significantly decreased white matter density across the brain. Exploratory correlational and permutation analyses suggest that the impact of peer rearing on behavior, endocrine and brain structural alterations are mediated by separate parallel mechanisms. ConclusionsTaken together, these results demonstrate in NHPs the importance of maternal rearing on the development of brain, behavior and hormonal systems that are linked to social functioning and adaptive responses. The findings suggest that the effects of maternal deprivation are mediated via multiple independent pathways which may account for the heterogeneity in behavioral and biological alterations observed in individuals that have experienced this early life adversity.

Alterations of serum neuropeptide levels and their relationship to cognitive impairment and psychopathology in male patients with chronic schizophrenia

Serum neuropeptide levels may be linked to schizophrenia (SCZ) pathogenesis. This study aims to examine the relation between five serum neuropeptide levels and the cognition of patients with treatment-resistant schizophrenia (TRS), chronic stable schizophrenia (CSS), and in healthy controls (HC). Three groups were assessed: 29 TRS and 48 CSS patients who were hospitalized in regional psychiatric hospitals, and 53 HC. After the above participants were enrolled, we examined the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) and the blood serum levels of α-melanocyte stimulating hormone (α-MSH), β-endorphin (BE), neurotensin (NT), oxytocin (OT) and substance.P (S.P). Psychiatric symptoms in patients with SCZ were assessed with the Positive and Negative Syndrome Scale. SCZ patients performed worse than HC in total score and all subscales of the RBANS. The levels of the above five serum neuropeptides were significantly higher in SCZ than in HC. The levels of OT and S.P were significantly higher in CSS than in TRS patients. The α-MSH levels in TRS patients were significantly and negatively correlated with the language scores of RBANS. However, the BE and NT levels in CSS patients were significantly and positively correlated with the visuospatial/constructional scores of RBANS. Moreover, the interaction effect of NT and BE levels was positively associated with the visuospatial/constructional scores of RBANS. Therefore, abnormally increased serum neuropeptide levels may be associated with the physiology of SCZ, and may cause cognitive impairment and psychiatric symptoms, especially in patients with TRS.

Oxytocin and state attachment responses to secure base support after stress in middle childhood

ABSTRACT We tried to replicate the finding that receiving care increases children’s oxytocin and secure state attachment levels, and tested whether secure trait attachment moderates the oxytocin and state attachment response to care. 109 children (9-11 years old; M = 9.59; SD = 0.63; 34.9% boys) participated in a within-subject experiment. After stress induction (Trier Social Stress Test), children first remained alone and then received maternal secure base support. Salivary oxytocin was measured eight times. Secure trait and state attachment were measured with questionnaires, and Secure Base Script knowledge was assessed. Oxytocin levels increased after receiving secure base support from mother after having been alone. Secure state attachment changed less. Trait attachment and Secure Base Script knowledge did not moderate oxytocin or state attachment responses to support. This might mean that, regardless of the attachment history, in-the-moment positive attachment experiences might have a beneficial effect on trait attachment development in middle childhood.

Intracerebroventricular injection of kisspeptin in male rats activates hypothalamo-pituitary-gonadal axis, but not hypothalamo-pituitary-adrenal axis

Kisspeptin is an important hormone involved in the stimulation of the hypothalamo-pituitary gonadal (HPG) axis. The HPG axis can be suppressed in certain conditions such as stress, which gives rise to the activation of the hypothalamo-pituitary-adrenal (HPA) axis. However, the physiological role of kisspeptin in the interaction of HPG and HPA axis is not fully understood yet. This study was conducted to investigate the possible effects of central kisspeptin injection on HPG axis as well as HPA axis activity. Adult male Wistar rats were randomly divided into seven groups as followed: sham (control), kisspeptin (50 pmol), P234 (1 nmol), kisspeptin + p234, kisspeptin + antalarmin (0.1 μg), kisspeptin + astressin 2B (1 μg), and kisspeptin + atosiban (300 ng/rat) (n = 10 each group). At the end of the experiments, the hypothalamus, pituitary, and serum samples of the rats were collected. There was no significant difference in corticotropic-releasing hormone immunoreactivity in the paraventricular nucleus of the hypothalamus, serum adrenocorticotropic hormone, and corticosterone levels among all groups. Moreover, no significant difference was detected in pituitary oxytocin level. Serum follicle-stimulating hormone and luteinizing hormone levels of the kisspeptin, kisspeptin + antalarmin, and kisspeptin + astressin 2B groups were significantly higher than the control group. Serum testosterone levels were significantly higher in the kisspeptin kisspeptin + antalarmin, kisspeptin + astressin 2B, and kisspeptin + atosiban groups compared to the control group. Our findings suggest that central kisspeptin injection causes activation in the HPG axis, but not the HPA axis in male rats.

Comparison of endogenous hypothalamic and serum OT levels between young and middle-aged perimenopausal female rats.

Oxytocin (OT) regulates food intake and body weight, particularly in obese individuals. Decreases in the effects of OT have recently been implicated in metabolic disturbances, and the administration of estradiol (E2) increased serum OT levels. Although weight gain is frequently observed in perimenopausal women, endogenous OT levels remain unclear. Therefore, we herein compared endogenous levels of hypothalamic and serum OT between young and middle-aged perimenopausal female rats and examined the relationship between serum estrogen and leptin levels. Body weight and visceral and subcutaneous fat weights were higher in middle-aged rats. Although no significant differences were observed in serum OT and E2 levels, serum leptin levels and hypothalamic mRNA levels of OT and the OT receptor (OTR) were significantly higher in middle-aged rats than in young rats. Serum OT levels did not correlate with hypothalamic OT mRNA levels or serum E2 levels. E2 maintains serum OT levels in perimenopausal rats, and other factors may elevate hypothalamic OT/OTR mRNA levels. Increases in body and fat weights in perimenopausal rats may be attributed to factors other than OT. Therefore, the administration of OT alone may not be sufficient to prevent metabolic disorders induced by the perimenopausal status. J. Med. Invest. 71 : 246-250, August, 2024.

Взаимосвязь колебаний уровней окситоцина в крови и слюне с когнитивными нарушениями у пациента с ишемической болезнью сердца до и после аортокоронарного шунтирования

Aim. To assess the dynamics of cognitive status and oxytocin levels in biological fluids (blood and saliva), as well as their relationship before and after coronary artery bypass surgery. Key points. According to the literature, postoperative cognitive dysfunction occurs in patients after coronary artery bypass grafting. The reasons for its development are factors that influence the preoperative, operational and postoperative stages. Timely diagnosis of cognitive deficit is extremely important, since the more pronounced the cognitive impairment, the less opportunities there are to provide assistance to patients. In this clinical observation, special attention is paid to oxytocin as a biomarker of degenerative brain lesions. Conclusion. We identified the development of postoperative cognitive dysfunction in a patient who did not have such disorders before surgery. There is a direct relationship between the state of cognitive functions and the level of oxytocin in the blood and saliva. Taking into account the data obtained, we propose to consider oxytocin as a biomarker of vascular cognitive disorders. Keywords: coronary heart disease, coronary artery bypass grafting, cognitive status, oxytocin, postoperative cognitive dysfunction.

ЭКСПРЕССИЯ ОКСИТОЦИНА И ПРОСТАГЛАНДИНА Е2 В МИОМЕТРИИ ПРИ СЛАБОСТИ РОДОВОЙ ДЕЯТЕЛЬНОСТИ

We examined 66 postpartum women (average age 27.6±2.3 years) who were on duty at the postpartum department of the 3rd City Clinical Hospital named after E.V. Klumova, Minsk for 2022–2024. The first inclusion included 34 patients whose birth ended with an emergency cesarean section. The comparison group included 32 patients with cesarean section caused by reasons not related to the weakness of labor. An immunohistochemical study of the expression levels of oxytocin (OT) and prostaglandin E2 (PG E2) in myometrial tissues obtained from the lower segment of the uterus during cesarean section was carried out using antibodies Oxytocin, Prostaglandin. Studies of potassium content in tissues were carried out using high-performance liquid chromatography. It was found that in patients with impaired contractile function and hypotonic dysfunction of the uterus, a strong inverse relationship was revealed between the tone of the uterus and the size of the uterine cavity (correlation coefficient r = -0.9751; p &lt; 0.001; 95% confidence interval) and a strong direct relationship between the tone of the uterus and index of resistance of the uterine vessels (correlation coefficient r = 0.93712; p = 0.001; 95% confidence interval), which reflects a close association between a decrease in myometrial contractility and its tone. During postpartum uterine subinvolution, compared with physiological birth, an unreliable increase in the expression of oxytocin and prostaglandin E2, respectively, to 8.94 ± 2.8 and 21.47 ± 3.2 and an unreliable decrease in the level of potassium in tissues was revealed, which dictates the search for other pathognomonic and diagnostic markers violations of the contractile function of the uterus and its hypotension during childbirth.

Parturition Detection Using Oxytocin Secretion Level and Uterine Muscle Contraction Intensity

The "Parturition Detection Sensor Belt," also known as the "Labor Pain Detection Sensor Belt," represents a novel advancement in maternal health monitoring. "Parturition Detection Sensor Belt" designed to simultaneously predict oxytocin levels and monitor uterine muscle contractions. This innovative system combines real-time prediction of oxytocin levels and simultaneous monitoring of uterine muscle contractions to provide a comprehensive solution for parturition detection. By integrating cutting-edge sensor technology and deep learning algorithms, the system offers precise, non-invasive monitoring during labor. The oxytocin level predictions aid in understanding maternal well-being, while the real-time uterine muscle contraction monitoring ensures early detection of labor progression. This interdisciplinary approach leverages advancements in biomedical engineering and data analysis, holding promise for improving the safety and care of expectant mothers. The "Parturition Detection Sensor Belt" has the potential to revolutionize the field of obstetrics by offering a versatile tool for healthcare providers, enhancing maternal health, and facilitating data-driven research in this critical domain. A correlation is developed between oxytocin release and muscle contraction which turns out to be nearly 0,899836. This infers that the two factors that we are considering as important parameters are having a strong association with each other

Does activation of oxytocinergic reward circuits postpone the decline of the aging brain?

Oxytocin supports reproduction by promoting sexual- and nursing behavior. Moreover, it stimulates reproductive organs by different avenues. Oxytocin is released to the blood from terminals of oxytocinergic neurons which project from the hypothalamus to the pituitary gland. Concomitantly, the dendrites of these neurons discharge oxytocin into neighboring areas of the hypothalamus. At this location it affects other neuroendocrine systems by autocrine and paracrine mechanisms. Moreover, sensory processing, affective functions, and reward circuits are influenced by oxytocinergic neurons that reach different sites in the brain. In addition to its facilitating impact on various aspects of reproduction, oxytocin is revealed to possess significant anti-inflammatory, restoring, and tranquilizing properties. This has been demonstrated both in many in-vivo and in-vitro studies. The oxytocin system may therefore have the capacity to alleviate detrimental physiological- and mental stress reactions. Thus, high levels of endogenous oxytocin may counteract inadequate inflammation and malfunctioning of neurons and supportive cells in the brain. A persistent low-grade inflammation increasing with age-referred to as inflammaging-may lead to a cognitive decline but may also predispose to neurodegenerative diseases such as Alzheimer's and Parkinson. Interestingly, animal studies indicate that age-related destructive processes in the body can be postponed by techniques that preserve immune- and stem cell functions in the hypothalamus. It is argued in this article that sexual activity-by its stimulating impact on the oxytocinergic activity in many regions of the brain-has the capacity to delay the onset of age-related cerebral decay. This may also postpone frailty and age-associated diseases in the body. Finally, oxytocin possesses neuroplastic properties that may be applied to expand sexual reward. The release of oxytocin may therefore be further potentiated by learning processes that involves oxytocin itself. It may therefore be profitable to raise the consciousness about the potential health benefits of sexual activity particularly among the seniors.

Decreased oxytocin plasma levels and oxytocin receptor expression associated with aggressive behavior in aggressive-impulsive disorders

IntroductionThis study aims to enhance the understanding of the association between the phenotypic and endophenotypic characteristics of impulsive-aggressive disorders, through the study of plasma oxytocin (OXT) and oxytocin receptor (OXTR) levels in patients with borderline personality disorder (BPD) and patients with eating disorders (ED), as well as to examine the relationship of OXT system with aggressive behavior in these disorders. Methods68 patients with BPD, 67 patients with ED and 57 healthy control subjects were examined for plasma oxytocin levels and protein expression of OXTR in blood mononuclear cells. Aggressive behavior was assessed using the State-Trait Anger Expression Inventory (STAXI-2). Other self and hetero-aggressive behaviors were also evaluated through interviews. ResultsBPD and ED patients exhibited significantly lower plasma oxytocin levels than control subjects. Furthermore, BPD patients demonstrated significantly reduced expression of OXTR compared to controls. Plasma oxytocin levels negatively correlated with verbal aggression, while OXTR expression was inversely associated with the STAXI trait subscale. ConclusionsThe findings validate the existence of oxytocin system dysfunction in impulsive-aggressive disorders. They also support the link between low OXT levels in plasma and OXTR expression and the impulsive-aggressive behavior that characterizes these patients in both state and trait situations.

Circulating Plasma Oxytocin Level Is Elevated by High-Intensity Interval Exercise in Men.

We evaluated whether repeated high-intensity interval exercise (HIIE) influences plasma oxytocin (OT) concentration in healthy men, and, given that OT is mainly synthesized in the hypothalamus, we assessed the concentration difference between the arterial (OT ART ) versus the internal jugular venous OT concentration (OT IJV ). Additionally, we hypothesized that an increase in cerebral OT release and the circulating concentration would be augmented by repeated HIIE. Fourteen healthy men (age = 24 ± 2 yr; mean ± SD) performed two identical bouts of HIIE. These HIIE bouts included a warm-up at 50%-60% maximal workload ( Wmax ) for 5 min followed by four bouts of exercise at 80%-90% Wmax for 4 min interspersed by exercise at 50%-60% Wmax for 3 min. The HIIE bouts were separated by 60 min of rest. OT was evaluated in blood through radial artery and internal jugular vein catheterization. Both HIIE bouts increased both OT ART (median [IQR], from 3.9 [3.4-5.4] to 5.3 [4.4-6.3] ng·mL -1 in the first HIIE, P < 0.01) and OT IJV (from 4.6 [3.4-4.8] to 5.9 [4.3-8.2] ng·mL -1 , P < 0.01), but OT ART-IJV was unaffected (from -0.24 [-1.16 to 1.08] to 0.04 [-0.88 to 0.78] ng·mL -1 , P = 1.00). The increased OT levels were similar in the first and second HIIE bouts (OT ARTP = 0.25, OT IJVP = 0.36). Despite no change in the cerebral OT release via the internal jugular vein, circulating OT increases during HIIE regardless of the accumulated exercise volume, indicating that OT may play role as one of the exerkines.

Effect of Mindfulness-Based Stress Reduction (MBSR) on Oxytocin Levels and Stress in Breastfeeding Mothers

The prevalence of exclusive breastfeeding in various cities of Bangka Belitung Province varies, where in 2018 from January to June, the prevalence of exclusive breastfeeding in Bangka Belitung Islands Province was relatively low (57.6%). The problem of milk production is influenced by the reduced stimulation of oxytocin hormone. One of the non-pharmacological therapies that can be done is relaxation by doing Mindfulness therapy. The aim was to determine the effect of mindfulness-based stress reduction (MBSR) on oxytocin levels and stress in breastfeeding mothers for 2 weeks consisting of 8 sessions in 3 meetings. The research method used was quantitative with a quasi experimental research design (pretest-posttest control group design). Penelitian ini dilakukan at Regional General Hospital Dr. (HC) Ir. Soekarno, Bangka Belitung Province in 2023. Dilaksanakan pada bulan Januari sampai dengan Maret 2023. The population in this study were breastfeeding mothers at Regional General Hospital Dr. (HC) Ir. Soekarno, Bangka Belitung Province with a sample of 36 using purposive sampling technique. Data were collected using a questionnaire. Data analysis was univariate and bivariate dengan uji t-test and Mann Whitney test . The results of mindfulness-based stress reduction increased oxytocin hormone levels in breastfeeding mothers for 2 weeks consisting of 8 sessions in 3 meetings lasting 150 minutes per meeting and mindfulness-based stress reduction decreased stress scores in breastfeeding mothers for 2 weeks consisting of 8 sessions in 3 meetings lasting 150 minutes per meeting. It is recommended that midwives provide information about Mindfulness therapy to increase the hormone oxytocin in breastfeeding mothers and can play an active role in overcoming the problems of breastfeeding mothers who experience anxiety or worry about producing breast milk and breastfeeding babies.

Blood oxytocin levels and the rs4686302 polymorphism of the oxytocin receptor gene in patients with adenomyosis

BACKGROUND: An in-depth study of the pathogenesis of adenomyosis and the development of new therapeutic approaches are extremely relevant. Atosiban, a competitive oxytocin receptor antagonist, may be a promising drug with a potential therapeutic effect. Oxytocin is involved in the pathogenesis of adenomyosis-associated dysmenorrhea, and there is evidence of increased expression of the oxytocin receptor (OXTR) in the myometrium in adenomyosis and the association of the OXTR gene polymorphic variant rs4686302 with oxytocin-induced myometrial contractility.&#x0D; AIM: The aim of this study was to evaluate blood oxytocin levels and the frequency of the polymorphic variants of the oxytocin receptor gene (OXTR) rs4686302 polymorphism in patients with adenomyosis and in healthy women of reproductive age.&#x0D; MATERIALS AND METHODS: The levels of oxytocin in the blood plasma were measured by competitive enzyme immunoassay (ELISA) in patients with adenomyosis (n = 56, with mean age of 37.5 ± 8.54 years), and in women without gynecological diseases (control group; n = 33, with mean age of 32.1 ± 5.40 years). The polymorphic variant rs4686302 of the OXTR gene was analyzed by PCR-RFLP analysis in patients with adenomyosis (n = 79, with mean age of 39.9 ± 7.74 years) and in control group patients (n = 49, with mean age of 37.0 ± 9.20 years). The chi-square (χ2) test was used to analyze the distribution of genotypes and alleles. Statistical data processing was performed using the Jamovi Software, Version 1.2.27 for Windows.&#x0D; RESULTS: In patients with adenomyosis, the level of oxytocin in the blood serum was significantly higher than in control group patients: 130.0 ± 27.9 pg/ml and 95.9 ± 26.7 pg/ml, respectively. The minor allele A of the OXTR gene polymorphic variant rs4686302 was significantly more common in patients with adenomyosis (28.5%) than in women in the control group (13.3%) and in the general sample (11–15% according to the 1000 Genomes Project). The odds of developing adenomyosis in patients with the presence of the A allele (the G/A and A/A genotypes) were 2.44 times higher compared to patients with the G/G genotype (OR 2.44, 95% CI 1.13–5.28).&#x0D; CONCLUSIONS: The data obtained suggest the participation of oxytocin and its receptor in the pathogenesis of adenomyosis and requires further research in this direction.

Oxytocin as a transdiagnostic biomarker of well-being in severe mental illness during the Covid-19 pandemic

Individuals with severe mental illness (SMI) have been found to suffer a greater decline in psychological well-being compared to the general population in times of stress. The present study aimed to examine clinical and endocrine resilience factors of psychological well-being in SMI patients during the Covid-19 pandemic. Methods: After Covid-19 crisis outburst in Israel 112 participants, 69 outpatients, and 43 inpatients and day treatment patients were recruited. Outpatients signed an online informed consent and filled in questionnaires regarding their level of mental health symptoms (OQ-45), fear of Covid-19 (FCV), and psychological well-being (PWB). Inpatients answered the same questionnaires and in addition, went through a positive social interaction paradigm while providing three saliva samples to measure their s-IgA and oxytocin (OT) levels. Results: A strong negative correlation was found in the whole sample between reported mental health symptoms, fear of Covid-19, and well-being. Hierarchical regression did not find additional contribution of the fear of the pandemic in predicting well-being beyond the impact of symptomatology. For inpatients (N = 39) only, hierarchical regression found that oxytocin, but not s-IgA could explain 5% of the variance of well-being (R2 = 0.05) in individuals with SMI regardless of their mental health symptoms (R2 = 0.46) and their marital status (R2 = 0.21). Conclusions: OT is suggested as a possible independent biological resilience factor of well-being in times of major stress among SMI patients. It is still unknown whether OT is a mediator that contributes to well-being or a biological marker that indicates the degree of beneficial social interactions.

Impact of IDO activation and alterations in the kynurenine pathway on hyperserotonemia, NAD+ production, and AhR activation in autism spectrum disorder

Hyperserotonemia is the most replicated biochemical anomaly associated with autism spectrum disorder (ASD) and has been reported in 35–46% of individuals with ASD. Serotonin is synthesised from the essential amino acid tryptophan (TRP). However, the main catabolic route of TRP is the kynurenine pathway (KP), which competes with serotonin synthesis when indoleamine dioxygenase (IDO) is activated. Using the same cohort of individuals with ASD, we used to report extensive studies of the serotonin/melatonin pathway, and found increased kynurenine (KYN), suggesting IDO activation in 58.7% of individuals with ASD (159/271), supported by a strong negative correlation between KYN/TRP ratio and miR-153-3p plasma levels, which negatively regulates IDO. IDO activation was associated with normoserotonemia, suggesting that IDO activation could mask hyperserotonemia which meant that hyperserotonemia, if not masked by IDO activation, could be present in ~94% of individuals with ASD. We also identified several KP alterations, independent of IDO status. We observed a decrease in the activity of 3-hydroxyanthranilate dioxygenase which translated into the accumulation of the aryl hydrocarbon receptor (AhR) selective ligand cinnabarinic acid, itself strongly positively correlated with the AhR target stanniocalcin 2. We also found a deficit in NAD+ production, the end-product of the KP, which was strongly correlated with plasma levels of oxytocin used as a stereotypical neuropeptide, indicating that regulated neuropeptide secretion could be limiting. These results strongly suggest that individuals with ASD exhibit low-grade chronic inflammation that is mediated in most cases by chronic AhR activation that could be associated with the highly prevalent gastrointestinal disorders observed in ASD, and explained IDO activation in ~58% of the cases. Taken together, these results extend biochemical anomalies of TRP catabolism to KP and posit TRP catabolism as a possible major component of ASD pathophysiology.

Characterization of MicroRNA expression profiles in the ovarian tissue of goats during the sexual maturity period

BackgroundThe ovary is an important reproductive organ in mammals, and its development directly affects the sexual maturity and reproductive capacity of individuals. MicroRNAs (miRNAs) are recognized as regulators of reproductive physiological processes in various animals and have been shown to regulate ovarian development through typical targeting and translational repression. However, little is known about the regulatory role of miRNAs in ovarian tissue development during sexual maturity in goats. To comprehensively profile the different physiological stages of sexual maturation in goats, we performed small-RNA sequencing of ovarian tissue samples collected at four specific time points (1 day after birth (D1), 2 months old (M2), 4 months old (M4), and 6 months old (M6)). In addition, we used ELISAs to measure serum levels of reproductive hormones to study their temporal changes.ResultsThe results showed that serum levels of gonadotropin-releasing hormone, follicle-stimulating hormone, luteinizing hormone, oestradiol, progesterone, oxytocin, and prolactin were lower in goats at the D1 stage than at the other three developmental stages (P < 0.05). The secretion patterns of these seven hormones show a similar trend, with hormone levels reaching their peaks at 4 months of age. A total of 667 miRNAs were detected in 20 libraries, and 254 differentially expressed miRNAs and 3 groups of miRNA clusters that had unique expression patterns were identified (|log2-fold change|> 1, FDR < 0.05) in the 6 comparison groups. RT‒qPCR was employed to confirm that the expression pattern of the 15 selected miRNAs was consistent with the Illumina sequencing results. Gene ontology analyses revealed significant enrichment of GO terms such as cell proliferation regulation, epithelial cell development, and amino acid transport, as well as important signaling pathways including the MAPK signaling pathway, the PI3K-Akt signaling pathway, and the oestrogen signaling pathway. Further miRNA‒mRNA regulation network analysis revealed that 8 differentially expressed miRNAs (chi-miR-1343, chi-miR-328-3p, chi-miR-877-3p, chi-miR-296-3p, chi-miR-128-5p, chi-miR-331-3p, chi-miR-342-5p and chi-miR-34a) have important regulatory roles in ovarian cell proliferation, hormone secretion and metabolism-related biological processes.ConclusionsOverall, our study investigated the changes in serum hormone and miRNA levels in the ovaries. These data provide a valuable resource for understanding the molecular regulatory mechanisms of miRNAs in ovarian tissue during the sexual maturity period in goats.

The interplay of childhood trauma, oxytocin, and impulsivity in predicting the onset of methamphetamine use

BackgroundChildhood trauma is associated with substance use disorders, including methamphetamine use disorder (MUD). Oxytocin, involved in social bonding, stress regulation, and reward processing, may influence addiction vulnerability and impulsivity in individuals with a history of childhood trauma. ObjectiveTo investigate the relationships among childhood trauma, oxytocin levels, impulsivity, and the age of first methamphetamine use in individuals with MUD. Participants and settingThe study included 298 male participants (148 individuals with MUD and 150 healthy controls) from both probation offices and psychiatric clinics. MethodsChildhood trauma was assessed using the Childhood Trauma Questionnaire-Short Form (CTQ-SF), impulsivity with the Barratt Impulsiveness Scale-11 (BIS-11), and plasma oxytocin levels were obtained. ResultsIndividuals with MUD exhibited higher levels of childhood trauma, impulsivity, and lower plasma oxytocin levels compared to healthy controls. Childhood trauma was associated with a younger age of first methamphetamine use, higher impulsivity, and lower oxytocin levels among individuals with MUD. Plasma oxytocin levels partially mediated the relationship between childhood trauma and both the age of first methamphetamine use and impulsivity. Serial mediation analysis demonstrated that oxytocin levels and impulsivity sequentially mediated the relationship between childhood trauma and the age of first methamphetamine use. ConclusionsThe findings reveal the complex interplay among childhood trauma, oxytocin, impulsivity, and methamphetamine use, emphasizing the importance of considering these factors in prevention and intervention strategies for MUD. Future research should explore oxytocin and impulsivity-focused interventions to mitigate the effects of childhood trauma and reduce MUD development risk.

Impact of Empathy on Oxytocin and Cortisol Responsivity in Caregivers to Older Adults with Chronic Conditions

AbstractBackgroundIndividuals who provide care for older adults with chronic conditions, such as dementia, experience poorer mental health when care recipients have low empathy. Empathy is thought to have two components: cognitive empathy (i.e., understanding others’ mental perspectives) and emotional empathy (i.e., feeling empathic concern/sympathy). Due to chronic stress, many caregivers experience burnout and compassion fatigue (i.e., emotional exhaustion and secondary traumatic stress). However, the impact of the caregiving role on empathy has not been well‐characterized in caregivers to older adults. Evidence from other populations show that stress hormones (e.g., cortisol) decrease when individuals engage in social bonding which in turn can increase levels of oxytocin. The present research study is highly novel because no previous studies have specifically investigated how empathy affects cortisol and oxytocin hormone levels in caregivers to older adults with chronic conditions.MethodsParticipants included 21 women caregivers to older adults with chronic conditions (Mage = 54.1; Medu = 16.1). Participants watched one video to induce empathy (empathy condition) and a separate video to induce an unemotional state (control condition) and completed self‐report ratings of empathy and distress before and after the videos. Saliva was collected using the passive drool method at baseline and after each video. Salivary hormone assays were conducted for cortisol and oxytocin. Participants completed standard measures of empathy (Interpersonal Reactivity Index) as well as compassion fatigue and burnout (Professional Quality of Life Scale).ResultsCaregivers with higher compassion fatigue reported higher levels of burnout (p&lt;.05) and burden (p&lt;.05). In addition, caregivers with higher compassion fatigue reported a reduced tendency to help others in daily life (p&lt;.05). In response to an empathy‐evoking video, momentary feelings of distress were positively associated with greater oxytocin (p&lt;.01), and there was a non‐significant trend towards lower cortisol (p = .1). Caregivers who reported higher levels of momentary empathic concern in response to the empathic video had lower oxytocin (p&lt;.05), whereas participants reporting higher cognitive empathy had greater oxytocin (p&lt;.05).ConclusionsThese results help to lay the groundwork for the possibility of developing hormonal interventions that may help to increase empathy and reduce stress in caregivers to older adults with chronic conditions.