Pain
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The development and maintenance of chronic pain are influenced by its social context, and especially by the responses of family members. For children, very few instruments are available that measure pain-related parental behavior. Using the Multidimensional Pain Inventory for adults (MPI; [Kerns RD, Turk DC, Rudy TE. ⋯ Child-perceived maternal behavior was significantly related to overall parenting and to mothers' actual behavior as observed during a cold pressor test. Finally, the PPBI was sensitive to differences in mothers' responses depending on the specific nature of the child's pain. Child and parent reports of parental behaviors were modestly correlated and were differentially related to the validity measures, hence supporting the importance of assessing the social context of pediatric pain independently of both the child's and the parent's perspectives.
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In previous studies we demonstrated that protein kinase D1 (PKD1/PKCmu) could directly phosphorylate the transient receptor potential V1 (TRPV1) at its N-terminal region and enhance the function of TRPV1 in CHO cells stably transfected with TRPV1. In the current study we assessed the involvement of PKD1 in pain modulation and explored the possible interaction between PKD1 and TRPV1 in rat inflammatory heat hypersensitivity. PKD1 was translocated to cytoplasmic membrane fraction and was trans-phosphorylated only in membrane fraction but not in cytoplasmic fraction of dorsal root ganglia (DRG) at 2 and 6h after Complete Freund's Adjuvant (CFA) treatment. ⋯ The average magnitude of the peak inward current evoked by capsaicin was greater in the DRG overexpressing PKD1 than in those expressing DN-PKD1. Furthermore, overexpressed PKD1 could up regulate, whereas PKD1 antisense could knock down TRPV1 content in DRG through posttranscriptional regulation manner. We concluded that PKD1 in DRG, through interaction with TRPV1, is involved in developing and maintaining inflammatory heat hypersensitivity.
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The purpose of this study was to verify the usefulness of an adaptation of the stress process model in organizing the psychological variables associated with the development of low-back-pain related disability. French-speaking Canadian workers on compensated sick leave (N=439) due to recent occupational low back pain (LBP) were evaluated during the sub-acute stage of LBP (between 30 and 83 days after injury). They were assessed for the following factors: life events, injury-specific cognitive appraisal, emotional distress, avoidance coping, and functional disability. ⋯ The stress model tested here reaffirms the importance of life events in the development of disability through the more established emotional distress factor. Also, cognitive appraisal appears to have an indirect effect on disability through activity avoidance and distress. This adaptation of the stress model makes it possible to integrate risk factors into a reduced set of meaningful factors and proposes a more general adaptation explanation of disability than the specific fear-avoidance model.
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Randomized controlled trials and meta-analyses provide evidence for the efficacy of cognitive-behaviourally informed treatment (CBT) programmes for chronic pain. The current study aims to provide practice-based evidence for the effectiveness of CBT in routine clinical settings. Over a 10-year period 1013 pain patients were accepted into a 4 week in-patient pain management programme. ⋯ There was also evidence that a small percentage of patients (1-2%) reliably deteriorated during the period of treatment. The limitations in the inferences that can be drawn from this study and of the methodology are discussed. A case is made for the application of benchmarking methods using data from RCTs in order to more fully evaluate practice and to generate better quality practice based evidence.