A Theoretical Endogenous Opioid Neurobiological Framework for Co-occurring Pain, Trauma, and Non-suicidal Self-injury

PURPOSE OF REVIEW

Individuals with chronic pain are significantly more likely to have experienced overwhelming trauma early and often in key developmental years. There is increasing acknowledgment that childhood trauma disrupts how individuals process and cope with both physical and emotional pain. Emerging studies acknowledge elevated rates of non-suicidal self-injury (NSSI) in chronic pain populations. This review provides a theoretical framework to understand the relationship between NSSI behavior and pain experience in persons with chronic pain and childhood trauma histories. We discuss how NSSI may act to regulate neurobiological (e.g., endogenous opioid systems) and psychological (e.g., heightened negative affect and emotion dysregulation) systems affected by childhood trauma, leading to temporary pain relief and a cycle of negative reinforcement perpetuating NSSI. As these concepts are greatly understudied in pain populations, this review focuses on key areas relevant to chronic pain that may provide a testable, conceptual framework to support hypothesis generation, future empirical investigation, and intervention efforts.

RECENT FINDINGS

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Borderline Personality Disorder Features and Risk for Prescription Opioid Misuse in a Chronic Pain Sample: Roles for Identity Disturbances and Impulsivity

Although borderline personality disorder (BPD) is associated with both chronic pain and substance abuse, little research examines how BPD features in chronic pain patients may constitute a risk factor for misuse of prescription opioids, and no prior research has examined which particular component(s) of BPD might put chronic pain patients at risk-an oversight that undermines prevention and treatment of such problematic opioid use. In a cross-sectional study of patients in treatment for chronic pain (N = 147), BPD features were associated with several measures of prescription opioid misuse, even controlling for pain severity and interference. Specifically, the identity disturbances and self-harmful impulsivity facets of BPD were most consistently associated with opioid misuse, and exploratory analyses suggested that these factors may be interactive in their effects. Together, these results suggest that BPD features-especially unstable identity and self-harmful impulsivity-play a unique role in problematic prescription opioid use in chronic pain settings.

Exploring the links among borderline personality disorder symptoms, trauma, and pain in patients with chronic pain disorders

OBJECTIVE

Chronic pain and borderline personality disorder (BPD) are commonly comorbid and jointly associated with increased symptoms of both disorders and clinical and functional impairment. Little is known, however, about specific links between these disorders. In a cross-sectional study of patients with chronic pain, we compared participants high or low on BPD symptoms on patterns of pain experience and types of child and adult traumas.

METHODS

Adults (N = 181) with chronic pain completed self-reports of pain severity, dimensions of pain experiencing, body coverage of pain, and clinical indicators of central sensitization (i.e., chronic hypersensitivity of the central nervous system), as well as measures of child and adult physical abuse, sexual abuse, trauma, and neglect. Participants also completed the McLean Screening Instrument for BPD.

RESULTS

Participants with clinically significant BPD symptoms (n = 32) reported more childhood sexual trauma, punishment, and neglect, as well as adult physical/sexual trauma, than those without elevated BPD symptoms. Among participants with clinically significant BPD symptoms, affective pain and central sensitization were elevated, potentially explained by heightened negative affect in BPD.

CONCLUSION

BPD symptoms are associated with increased clinical severity among patients with chronic pain as well as a unique manifestation of pain experiencing (i.e., increased affective pain and central sensitization in particular). Childhood trauma of all types is associated with chronic pain and BPD co-occurrence. Researchers and clinicians should assess for BPD in people with chronic pain to enhance conceptual models of the transaction between these disorders and to improve clinical care.

Borderline Personality Disorder Features Are Associated with Concurrent Pain-Related Disability in a Chronic Pain Sample

OBJECTIVE

To determine whether core features of borderline personality disorder are associated with increased rates of being on disability benefits due to chronic pain conditions.

SUBJECTS

A total of 147 patients currently in treatment for chronic pain at a multimodal chronic pain clinic.

METHODS

We tested for a concurrent relationship between borderline personality disorder features and employment status using self-report measures.

RESULTS

Borderline personality disorder features were associated with increased likelihood of currently being on disability due to pain conditions (odds ratio [OR] = 23.13, 95% confidence interval [CI] = 1.68-318.73), on disability due to other conditions (OR = 33.65, 95% CI = 2.15-526.13), and unemployed (OR = 20.14, 95% CI = 1.38-294.93), even while controlling for pain severity and interference, depression, and trait anxiety. A follow-up analysis revealed that these associations were due to the negative relationships facet of borderline personality disorder features.

CONCLUSIONS

Borderline personality disorder features, particularly negative relationships, are associated with increased rates of pain disability, general disability, and unemployment in a chronic pain sample. Future research should examine mechanisms by which the maladaptive interpersonal behaviors and cognitions of borderline personality disorder might result in worse long-term employment outcomes of chronic pain.

Incidence and temporal trends of co-occurring personality disorder diagnoses in immune-mediated inflammatory diseases

AIMS

Although immune-mediated inflammatory diseases (IMID) are associated with multiple mental health conditions, there is a paucity of literature assessing personality disorders (PDs) in these populations. We aimed to estimate and compare the incidence of any PD in IMID and matched cohorts over time, and identify sociodemographic characteristics associated with the incidence of PD.

METHODS

We used population-based administrative data from Manitoba, Canada to identify persons with incident inflammatory bowel disease (IBD), multiple sclerosis (MS) and rheumatoid arthritis (RA) using validated case definitions. Unaffected controls were matched 5:1 on sex, age and region of residence. PDs were identified using hospitalisation or physician claims. We used unadjusted and covariate-adjusted negative binomial regression to compare the incidence of PDs between the IMID and matched cohorts.

RESULTS

We identified 19 572 incident cases of IMID (IBD n = 6,119, MS n = 3,514, RA n = 10 206) and 97 727 matches overall. After covariate adjustment, the IMID cohort had an increased incidence of PDs (incidence rate ratio [IRR] 1.72; 95%CI: 1.47-2.01) as compared to the matched cohort, which remained consistent over time. The incidence of PDs was similarly elevated in IBD (IRR 2.19; 95%CI: 1.69-2.84), MS (IRR 1.79; 95%CI: 1.29-2.50) and RA (IRR 1.61; 95%CI: 1.29-1.99). Lower socioeconomic status and urban residence were associated with an increased incidence of PDs, whereas mid to older adulthood (age 45-64) was associated with overall decreased incidence. In a restricted sample with 5 years of data before and after IMID diagnosis, the incidence of PDs was also elevated before IMID diagnosis among all IMID groups relative to matched controls.

CONCLUSIONS

IMID are associated with an increased incidence of PDs both before and after an IMID diagnosis. These results support the relevance of shared risk factors in the co-occurrence of PDs and IMID conditions.

Borderline Personality Disorder Symptoms and Pain in College Students: The Role of Emotional Suppression

Borderline personality disorder (BPD) is associated with higher rates of pain conditions and greater pain impairment. Past research implicates emotional suppression in acute pain tolerance; thus, emotional suppression may contribute to pain interference among those with high BPD features. Participants were 89 university students who completed measures of BPD features, and complied with 2-week daily diary procedures assessing suppression of emotional thoughts associated with social and nonsocial stressors, distress, pain severity, and interference. Multilevel models revealed a BPD × Suppression × Distress interaction, such that suppression in response to social (but not nonsocial) stressors in the context of high distress was related to pain interference when controlling for pain severity among those with high, but not low, BPD features. These findings suggest. that suppression of emotionally relevant thoughts in response to high distress may contribute to the functional impairment from pain among those with high BPD symptoms.

Recent advances in understanding physical health problems in personality disorders

Personality disorders are associated with a range of adverse health outcomes, contributing to the high healthcare utilization seen in patients with these disorders. A growing literature supports a robust association of personality disorders and health problems. The primary aim of this article is to summarize the most recent research documenting the associations between personality disorders and health conditions. Extending past reviews, we discuss the association of personality disorders with chronic physical illnesses, sleep disturbances, pain conditions, and obesity. We provide recommendations for future research in this area.