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Management of atopic dermatitis: a narrative review.

Atopic dermatitis (atopic eczema) is the most common inflammatory skin disease and has a significant burden on the quality of life of patients, families and caregivers. Its pathogenesis is a complex interplay between genetics and environment, involving impaired skin barrier function, immune dysregulation primarily involving the Th2 inflammatory pathway, itch, and skin microbiome. Restoration of skin barrier integrity with regular emollients and prompt topical anti-inflammatory therapies are mainstays of treatment. Systemic therapy is considered for moderate to severe disease. New understanding of inflammatory pathways and developments in targeted systemic immunotherapies have significantly advanced atopic dermatitis management. Dupilumab is a safe and effective treatment that is now available in Australia. Other promising agents for atopic dermatitis include Janus kinase, interleukin (IL)-13 and IL-31 inhibitors.

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Classification of painful or painless diabetic peripheral neuropathy and identification of the most powerful predictors using machine learning models in large cross-sectional cohorts.

To improve the treatment of painful Diabetic Peripheral Neuropathy (DPN) and associated co-morbidities, a better understanding of the pathophysiology and risk factors for painful DPN is required. Using harmonised cohorts (N = 1230) we have built models that classify painful versus painless DPN using quality of life (EQ5D), lifestyle (smoking, alcohol consumption), demographics (age, gender), personality and psychology traits (anxiety, depression, personality traits), biochemical (HbA1c) and clinical variables (BMI, hospital stay and trauma at young age) as predictors.

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Neuropathic pain in patients with knee osteoarthritis: Relation with comorbidities and functional status.

The aim of this study was to evaluate the prevalence of neuropathic pain components of knee osteoarthritis (OA) patients and to identify the relation between associated neuropathic pain and comorbidities, pain intensity, function, and radiographic severity of knee OA.

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Treatment experiences and clinical characteristics in migraine and tension-type headache patients before the first visit to a tertiary headache center.

To investigate previous treatment and clinical characteristics in migraine and tension-type headache patients at their first visit to a tertiary headache center.

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Association of Race and Ethnicity with Pediatric Postoperative Pain Outcomes.

Inequitable variability in healthcare practice negatively affects patient outcomes. Children of color may receive different analgesic medications in the perioperative period, resulting in different outcomes.

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Psychosocial Predictors of Chronic Musculoskeletal Pain Outcomes and their Contextual Determinants among Black Individuals: A Narrative Review.

Black communities are disproportionally affected by Chronic Musculoskeletal Pain (CMP), but little is known about the psychological predictors of CMP outcomes and their contextual determinants among Black individuals. To address this gap, we conducted a narrative review of extant literature to (1) report the major conceptual models mentioned in prior work explaining the link between contextual determinants and psychological responses to pain among Black individuals with CMP; and (2) describe psychological factors related to CMP outcomes in this population that are highlighted in the literature. We searched 4 databases (APA PsycNet, PubMed/MEDLINE, Scopus, and Google Scholar) using the following search terms: musculoskeletal pain, chronic pain, mental health, psychological, coping, health disparities, contextual factors, conceptual models, psychosocial, Black, African American, pain, disability, and outcomes. We illustrate 3 relevant conceptual models – socioecological, cumulative stress, and biopsychosocial – related to contextual determinants and several psychological factors that influence CMP outcomes among Black individuals: (1) disproportionate burden of mental health and psychiatric diagnoses, (2) distinct coping strategies, (3) pain-related perceived injustice and perceived racial/ethnic discrimination, and (4) Preferences and expectations related to seeking and receiving pain care. The detailed clinical and research implications could serve as a blueprint for the providers and clinical researchers to address health disparities and improve care for Black individuals with CMP. Perspective: This narrative review illustrates conceptual models explaining the link between contextual determinants and psychological responses to pain among Black individuals with chronic musculoskeletal pain. We discuss 3 relevant conceptual models – socioecological, cumulative stress, biopsychosocial -, and 4 psychological factors: disproportionate burden of mental health, distinct coping strategies, perceived injustice/discrimination, preferences/expectations.

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Error Processing and Pain: A New Perspective.

Errors put organisms in danger. Upon error commission, error processing allows for the updating of behavior that proved ineffective in light of the current context and goals, and for the activation of behavioral defensive systems. Pain, on the other hand, signals actual or potential danger to one's physical integrity and, likewise, motivates protective behavior. These parallels suggest the existence of cross-links between pain and error processing but so far their relationship remains elusive. In this review, we tie together findings from the field of pain research with those from electroencephalography studies on error processing [specifically the Error Related Negativity (ERN) and Positivity (Pe)]. More precisely, we discuss three plausible associations: Firstly, pain may enhance error processing as it increases error salience. Secondly, persons fearful of pain may be particularly vigilant towards painful errors and thus show a stronger neural response to them. Thirdly, the ERN as a component of the neural response to error commission is considered an endophenotype of threat sensitivity. As high sensitivity to pain threats is known to incite avoidance behavior, this raises the intriguing possibility that neural signatures of error processing predict pain-related protective behaviors, such as avoidance. We propose an integration of these findings into a common framework to inspire future research. Perspectives Inspired by research in anxiety disorders, we discuss the potential bi-directional relationships between error processing and pain, and identify future directions to examine the neural and psychological processes involved in acute and chronic pain and respective avoidance behavior.

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If the doors of perception were cleansed, would chronic pain be relieved? Evaluating the benefits and risks of psychedelics.

Psychedelic substances have played important roles in diverse cultures, and ingesting various plant preparations to evoke altered states of consciousness has been described throughout recorded history. Accounts of the subjective effects of psychedelics typically focus on spiritual and mystical-type experiences, including feelings of unity, sacredness, and transcendence. Over the past two decades, there has been increasing interest in psychedelics as treatments for various medical disorders, including chronic pain. Although concerns about adverse medical and psychological effects contributed to their controlled status, contemporary knowledge of psychedelics suggests that risks are relatively rare when patients are carefully screened, prepared, and supervised. Clinical trial results have provided support for the effectiveness of psychedelics in different psychiatric conditions. However, there are only a small number of generally uncontrolled studies of psychedelics in patients with chronic pain (e.g., cancer pain, phantom limb pain, migraine, and cluster headache). Challenges in evaluating psychedelics as treatments for chronic pain include identifying neurobiologic and psychosocial mechanisms of action and determining which pain conditions to investigate. Truly informative proof-of-concept and confirmatory randomized clinical trials will require careful selection of control groups, efforts to minimize bias from unblinding, and attention to the roles of patient mental set and treatment setting. Perspective: There is considerable promise for the use of psychedelic therapy for pain, but evidence-based recommendations for the design of future studies are needed to ensure that the results of this research are truly informative.

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Central Nervous Activity during a Dot Probe Task with Facial Expressions in Fibromyalgia.

Fibromyalgia syndrome (FMS) is a chronic pain condition accompanied by affective symptoms and cognitive impairments. This study investigated central nervous correlates of attentional and emotional processing in FMS. Therefore, event-related potentials were recorded in 26 FMS patients and 26 healthy controls during a dot probe task, which required participants to decide which side of the screen an asterisk was displayed on; the asterisk was immediately preceded by a facial expression (anger, pain, happiness, neutral) on the left or right side. Comorbid depression was also assessed. In patients, N170 amplitude was smaller for anger and pain expressions than for happy expressions, and P2 was greater for pain expressions than for happy expressions. N170 and P2 were unaffected by emotional expressions in controls. LPC was smaller overall in patients than controls. Though reaction times were longer overall in patients than controls, no behavioral effects of emotional stimuli arose in these groups. In contrast, FMS patients with comorbid depression showed less attentional interference due to emotional expressions, and less difficulty disengaging from these stimuli than patients without depression. While the observations concerning N170 suggested facilitated encoding of facial features representing negative rather than positive emotions in FMS and more automatized processing of pain expressions, those for P2 indicated increased attentional resource allocation to pain-related information. Reduced LPC reflects nonspecific deficits in sustained attention in FMS, which is in line with the longer reaction times. Behavioral data suggest lower processing depth of emotional information in patients with comorbid depression.

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The contributions of mu-opioid receptors on glutamatergic and GABAergic neurons to analgesia induced by various stress intensities.

The endogenous opioid system plays a crucial role in stress-induced analgesia. Mu-opioid receptors (MORs), one of major opioid receptors, are expressed widely in sub-populations of cells throughout the central nervous system. However, the potential roles of MORs expressed in glutamatergic (MOR) and γ-aminobutyric acidergic (MOR) neurons in stress-induced analgesia remains unclear. By examining tail-flick latencies to noxious radiant heat of male mice, here we investigated the contributions of MOR and MOR to behavioral analgesia and activities of neurons projecting from periaqueductal gray (PAG) to rostral ventromedial medulla (RVM) induced by a range of time courses of forced swim exposure. The moderate but not transitory or prolonged swim exposure induced a MOR-dependent analgesia, although all of these three stresses enhanced β-endorphin (β-EP) release. Selective deletion of MOR but not MOR clearly attenuated analgesia and blocked the enhancement of activities of PAG-RVM neurons induced by moderate swim exposure. Under transitory swim exposure, in contrast, selective deletion of MOR elicited an analgesia behavior via strengthening the activities of PAG-RVM neurons. These results indicate that MOR-dependent endogenous opioid signaling participates in nociceptive modulation in a wide-range, not limited to moderate, of stress intensities. Endogenous activation of MOR exerts analgesia whereas MOR produces anti-analgesia. More importantly, with increasement of stress intensities, the efficiencies of MORs on nociception shifts from balance between MOR and MOR to biasing towards MOR mediated processes. Thus, our results point to cellular dynamic characters of MORs expressed in excitatory and inhibitory neurons in pain modulation under various stress intensities.Mu-opioid receptors (MORs) are one of major opioid receptors playing a critical role in stress-induced analgesia, they are widely expressed on different types of neurons, but the potential roles of them expressed in glutamatergic (MOR) and γ-aminobutyric acidergic (MOR) neurons are poorly understood. This work clarifies the divergent roles of MOR and MOR in analgesia under various swim stress intensities. We demonstrate that MOR are essential for stress-induced analgesia, whereas MOR elicit an anti-analgesic like response. The contributions of MOR and MOR to analgesia depends on stress intensity, their opposite effects neutralizing each other under transitory stress and then biasing towards MOR under moderate stress. This report appraises different roles for these neuronal populations' MORs in modulating opioid-dependent stress-induced analgesia.

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