The link between oxytocin plasma levels and observed communication behaviors during sexual and nonsexual couple discussions: An exploratory study

Severe PTSD is marked by reduced oxytocin and elevated vasopressin

Neuroendocrine analyses of posttraumatic stress disorder (PTSD) have generally focused on hypothalamic-pituitary-adrenal (HPA) axis alterations. In the present analyses, we examine two additional neuroendocrine factors that have been previously implicated in biological stress responses: oxytocin (OT) and arginine vasopressin (AVP). Here we examined basal neuropeptide status in military veterans clinically diagnosed with PTSD (n = 29) and in two non-traumatized comparison groups with previous stress exposure (n = 11 SWAT trainees and n = 21 ultramarathon runners). PTSD patients showed low levels of plasma OT and high levels of AVP. The ratio of AVP/OT robustly related to PTSD status, and emerged as a statistically plausible mediator of relationships between the number of personal traumatic experiences and subsequent PTSD symptom burden. Over the course of behavioral therapy for PTSD, measures of OT showed a significant but modest normalization. Plasma cortisol levels were not statistically different among the three groups. This study suggests that AVP/OT ratios may represent a neuroendocrine predictor of severe PTSD, as well as a potential treatment response biomarker.

Intranasal Oxytocin and Pain Reduction: Testing a Social Cognitive Mediation Model

Oxytocin is well known for its role in relationships and social cognition and has more recently been implicated in pain relief and pain perception. Connections between prosocial feelings and pain relief are also well documented; however, the effects of exogenous oxytocin on social cognition and pain have not been explored. The current study tested whether intranasally delivered oxytocin affects pain perception through prosocial behaviors. Additionally, moderation of the effects of oxytocin by life history or genetic polymorphisms is examined. Young adults (n = 43; 65% female) were administered intranasal oxytocin (24 IU) or placebo in a crossover design on two visits separated by a one-week washout period. Pain was delivered via cold pressor. Baseline measures for decision-making and social cognition were collected, as well as pain sensitivity and medication history. Saliva samples were collected for analysis of genetic markers, and urine samples were collected to assess oxytocin saturation. Following oxytocin administration, participants reported increased prosocial cognition and decision-making. Pain perception appeared to be adaptive, with procedural order and expectation affecting perception. Finally, behavioral trust and cooperation responses were significantly predicted by genetic markers. Oxytocin may increase a patient's trust and cooperation and reduce pain sensitivity while having fewer physiological side effects than current pharmaceutical options.

Close encounters with oxytocin

The purpose of this narrative review is to use a personal perspective to describe unanticipated and pivotal findings that drew the author into the study oxytocin. Oxytocin was originally described as a "female reproductive hormone." However, supporting reproduction is only one of a myriad of functions now attributed to oxytocin. Oxytocin promotes survival and resilience in both sexes and across the lifespan, especially in the context of stress or trauma and helps to explain the health benefits of relationships. Oxytocin works in the context of individual histories and in conjunction with other molecules, as well as the autonomic nervous system and immune factors. The chemical properties of oxytocin make it biologically active, but difficult to measure. As a deeper understanding of the biology of oxytocin is emerging, we may use knowledge of the properties of oxytocin to uncover adaptive strategies that protect and heal in the face of stress and adversity in both males and females.

Early Life Trauma and Social Processing in HIV: The Role of Neuroendocrine Factors and Inflammation

OBJECTIVE

Early life trauma (ELT) and HIV are associated with social processing deficits. In people with HIV (PWH), we examined whether facial emotion identification accuracy differs by ELT and whether neuroendocrine factors including cortisol, oxytocin (OT), and arginine vasopressin, and/or immune system measures play a role in the ELT-performance association.

METHODS

We used secondary data from the placebo condition of a pharmacologic challenge study in PWH. Presence of ELT was measured with the Childhood Trauma Questionnaire (at least moderate experiences of sexual, physical, and/or emotional abuse). Social processing was measured with the Facial Emotion Perception Test (FEPT). Salivary immune system measures and cortisol were sampled across a 5-hour study session. Blood was collected at study session start (12 pm ) to measure OT and arginine vasopressin. We examined the association of ELT with FEPT and five biological moderators (from principal components analysis of 12 biomarkers) of ELT-FEPT associations.

RESULTS

Of 58 PWH (42 men; mean [standard deviation] age = 33.7 [8.9] years), 50% endorsed ELT. ELT-exposed PWH demonstrated lower identification accuracy across all emotional expressions (unstandardized β [ B ] = 0.13; standard error [SE] = 0.05; p = .021, d = 0.63) and had higher OT levels compared with ELT-unexposed PWH ( t(1,56) = 2.12, p = .039; d = 0.57). For total accuracy, an OT/C-reactive protein factor moderated the ELT-FEPT association ( B = 0.14; SE = 0.05; p = .014); accuracy was lower in ELT-exposed PWH versus ELT-unexposed PWH when the factor was low but not when high. Similar results were obtained for fearful, neutral, and happy faces ( p values < .05). Regardless of ELT, a myeloid migration (MCP-1/MMP-9) factor was associated with reduced accuracy ( p values < .05).

CONCLUSIONS

Our pilot findings suggest that ELT may alter social processing in PWH, and OT and C-reactive protein may be a target for improving social processing in ELT-exposed PWH, and myeloid migration markers may be a target in PWH more generally.

Sexual Communication between Adolescent Partners: A Scoping Review and Directions for Future Research

Sexual communication between adolescent partners is an important component of sexual health and wellbeing. Over 40 years of research on adolescent sexual communication has yielded rich information, yet there remain gaps in our understanding of the communication process. The purpose of this scoping review was to synthesize the body of research on adolescent sexual communication to identify how communication has been conceptualized, how researchers have measured communication, and what theoretical frameworks have been applied across the literature. We identified 198 assessments of sexual communication across 119 quantitative studies. This work included 127,489 adolescents (M_age = 15.97) from 15 countries (81.5% U.S.-based). Most studies relied on self-reports (93.4%) and surveyed only one member of a couple (97.5%). The definition of sexual communication was highly varied across the literature: in half of assessments (52.0%) sexual communication was operationalized as a behavior-the verbal or nonverbal exchange of messages about sex-whereas the remaining half of assessments captured social-cognitive aspects of communication (e.g., communication self-efficacy, fear/anxiety). There was also a tendency for investigators to create their own idiosyncratic instruments: half of studies (48.9%) used instruments created by the research team with limited or no discussion of reliability/validity. Regarding the topic of communication, a third of assessments (33.8%) focused exclusively on condom communication and another quarter (24.0%) focused on other safer-sex issues (e.g., STDs, abstinence). Notably absent were studies focused on communication surrounding consent or sexual pleasure. Also absent was a guiding conceptual model or theory that could unify this body of work. Overall, results highlight gaps and inconsistencies in how partner sexual communication has been conceptualized, measured, and theorized about in previous work. We provide several recommendations for future theory-building efforts as well as rigorous, multimethod empirical investigations of adolescent sexual communication that would further our understanding of this important aspect of adolescent sexual wellbeing.

Couple Communication Behaviors During Sexual and Nonsexual Discussions and Their Association with Relationship Satisfaction

The quality of communication between romantic partners has consistently been found to be associated with relationship well-being and stability. Studies on sexual and nonsexual communication, however, have typically assessed communication skills and behaviors using self-report measures. The use of observational methods has several advantages, including the ability to capture and allow for the independent coding of both partners' communication behaviors. With few exceptions, research applying observational methods has not distinguished between sexual and nonsexual communication behaviors. In the present study, we asked 126 young, mixed-sex couples to engage in sexual and nonsexual conflict discussions. The two 7-min discussions were videotaped and rated by trained coders on nine behavioral dimensions using an adaptation of the specific affect coding system (Gottman & Krokoff, 1989) and the system for coding interactions and family functioning (Lindahl & Malik, 2001). Coder ratings applied to the discussion as a whole. Analyses included factor analysis on the behavioral dimensions and multilevel modeling incorporating the actor-partner interdependence model (APIM). We found significant differences in how couples interacted during the two discussions, with more positive (affectionate and validating) and less negative behaviors during sexual discussions as compared to nonsexual discussions. In both women and men, expressions of positivity during the two types of conflict discussions were associated with higher relationship satisfaction. Gender differences were found in the association between negative behaviors during sexual discussions and relationship satisfaction, with men but not women's negative behaviors being associated with lower relationship satisfaction. These findings point at distinct qualities of sexual communication and its association with couples' relational well-being and contribute to a better scientific understanding, with clinical relevance, of sexual and nonsexual communication.

Associations between alcohol use and peripheral, genetic, and epigenetic markers of oxytocin in a general sample of young and older adults

INTRODUCTION

Human and nonhuman animal research suggests that greater oxytocin (OT) activity is protective against harmful substance use. Most research on this topic is preclinical, with few studies evaluating the association between substance use and individual differences in the human OT system. The present study sought to fill this gap by evaluating the relationship between alcohol use and multiple biological measures of OT activity in an overall low to moderate-drinking sample.

METHOD

As part of a larger study, generally healthy young (n = 51) and older (n = 53) adults self-reported whether they regularly used alcohol and how much alcohol they consumed per week. Participants also provided blood samples from which peripheral OT, and in an age-heterogeneous subset of participants (n = 56) variation in the oxytocin receptor gene (the OXTR rs53576 polymorphism) and OXTR DNA methylation levels (at cytosine-guanine dinucleotide sites -860, -924, -934), were obtained.

RESULTS

A-allele carriers of the OXTR rs53579 polymorphism were less likely to regularly consume alcohol. Among regular alcohol consumers, number of alcoholic drinks per week was positively associated with peripheral OT in regression models excluding observations of high influence (postdiagnostic models). Number of alcoholic drinks per week was consistently negatively associated with OXTR DNA methylation at site -860; and with OXTR DNA methylation at site -924 in postdiagnostic models.

CONCLUSIONS

The significant associations between alcohol use and individual differences in OT activity support the involvement of the OT system in alcohol use, which most likely reflect the role of OT when alcohol use is under control of its rewarding properties and/or the acute impacts of alcohol on the OT system. Additional research with markers of OT activity and alcohol use, particularly longitudinal, is needed to clarify the bidirectional effects of OT and alcohol use in moderate to harmful drinking and dependence.

Longitudinal tracking of human plasma oxytocin suggests complex responses to moral elevation

Positive social experiences may induce oxytocin release. However, previous studies of moral elevation have generally utilized cross-sectional and simple modeling approaches to establish the relationship between oxytocin and emotional stimuli. Utilizing a cohort of 30 non-lactating women (aged 23.6 ± 5.7 years), we tested whether exposure to a video identified as capable of eliciting moral elevation could change plasma oxytocin levels. Uniquely, we utilized a high-frequency longitudinal sampling approach and multilevel growth curve modeling with landmark registration to test physiological responses. The moral elevation stimulus, versus a control video, elicited significantly greater reports of being “touched/inspired” and “happy/joyful”. However, the measured plasma oxytocin response was found to be markedly heterogeneous. While the moral elevation stimulus elicited increased plasma oxytocin as expected, this increase was only modestly larger than that seen following the control video. This increase was also only present in some individuals. We found no relationship between plasma oxytocin and self-report responses to the stimulus. From these data, we argue that future studies of the relationship between oxytocin and emotion need to anticipate heterogeneous responses and thus incorporate comprehensive individual psychological data; these should include evidence-based variables known to be associated with oxytocin such as a history of trauma, and the individual’s psychological and emotional state at the time of testing. Given the complexity of physiological oxytocin release, such studies also need to incorporate frequent biological sampling to properly examine the dynamics of hormonal release and response.

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A moral elevation stimulus elicits positive emotional responses

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The human oxytocin responses to a morel elevation stimulus are more heterogenous than previously reported

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Future studies need to utilize longitudinal hormone measurements and comprehensive psychological assessments

The Sexual Communication Discrepancy Index: A Multidimensional Self-Report Instrument for the Assessment of Sexual Communication Discrepancies

Sexual communication offers relational and sexual benefits. However, the sexual communication occurring in an individual's relationship may be incongruent with their expectations for such communication. Such discrepancies can affect partners' relationships and are important to examine. This study presents a new instrument for assessing discrepancies in sexual communication, the Sexual Communication Discrepancy Index (SCDI). Results of two studies examining SCDI's dimensionality, factor structure, and reliability revealed a promising 24-item, 4-factor scale instrument. The index offers a brief, easily scored, and reliable measure of sexual communication discrepancies. It may prove useful for researchers and clinicians who focus on sexual communication.