Bone marrow adipose tissue (BMAT) is preserved or increased in states of caloric restriction. Similarly, we found that BMAT in the tail vertebrae, but not the red marrow in the tibia, resists loss of neutral lipid with acute, 48-hour fasting in rats. The mechanisms underlying this phenomenon and its seemingly distinct regulation from peripheral white adipose tissue (WAT) remain unknown. To test the role of β-adrenergic stimulation, a major regulator of adipose tissue lipolysis, we examined the responses of BMAT to β-adrenergic agonists. Relative to inguinal WAT, BMAT had reduced phosphorylation of hormone sensitive lipase (HSL) after treatment with pan-β-adrenergic agonist isoproterenol. Phosphorylation of HSL in response to β3-adrenergic agonist CL316,243 was decreased by an additional ~90% (distal tibia BMAT) or could not be detected (tail vertebrae). Ex vivo, adrenergic stimulation of lipolysis in purified BMAT adipocytes was also substantially less than iWAT adipocytes and had site-specific properties. Specifically, regulated bone marrow adipocytes (rBMAs) from proximal tibia and femur underwent lipolysis in response to both CL316,243 and forskolin, while constitutive BMAs from the tail responded only to forskolin. This occurred independently of changes in gene expression of β-adrenergic receptors, which were similar between adipocytes from iWAT and BMAT, and could not be explained by defective coupling of β-adrenergic receptors to lipolytic machinery through caveolin 1. Specifically, we found that whereas caveolin 1 was necessary to mediate maximal stimulation of lipolysis in iWAT, overexpression of caveolin 1 was insufficient to rescue impaired BMAT signaling. Lastly, we tested the ability of BMAT to respond to 72-hour treatment with CL316,243 in vivo. This was sufficient to cause beiging of iWAT adipocytes and a decrease in iWAT adipocyte cell size. By contrast, adipocyte size in the tail BMAT and distal tibia remained unchanged. However, within the distal femur, we identified a subpopulation of BMAT adipocytes that underwent lipid droplet remodeling. This response was more pronounced in females than in males and resembled lipolysis-induced lipid partitioning rather than traditional beiging. In summary, BMAT has the capacity to respond to β-adrenergic stimuli, however, its responses are muted and BMAT generally resists lipid hydrolysis and remodeling relative to iWAT. This resistance is more pronounced in distal regions of the skeleton where the BMAT adipocytes are larger with little intervening hematopoiesis, suggesting that there may be a role for both cell-autonomous and microenvironmental determinants. Resistance to β-adrenergic stimuli further separates BMAT from known regulators of energy partitioning and contributes to our understanding of why BMAT is preserved in states of fasting and caloric restriction.

Objective Children with type 1 diabetes and their parents face daily self-care demands, leading to diabetes-specific emotional distress. A standardized measure of diabetes distress can guide clinical care and prevent negative outcomes. Methods This study evaluated the psychometric properties of child-and parent-report measures of the Problem Areas in Diabetes Scale, adapted for children ages 8-12 (PAID-C) and their parents (P-PAID-C). Participants were from 42 diabetes camps in the United States. Children (N ¼ 804; mean age ¼ 10.3 6 1.1) and parents (N ¼ 968) completed measures of diabetes distress, diabetes-related strengths, and self-care skills. Half of the sample was used for exploratory factor analyses (EFA) with direct oblimin rotation and the other half for confirmatory factor analyses (CFAs). Results For the PAID-C, EFA and CFAs supported an 11-item two-factor measure, Cronbach's a ¼ .91, accounting for 54.6% of the variance. For the P-PAID-C, analyses resulted in a 16-item measure, Cronbach's a ¼ .92, accounting for 51.9% of the variance. PAID-C and P-PAID-C scores were positively correlated with HbA1c (r child ¼ .08, p ¼ .04; r parent ¼ .18, p < .001), and negatively correlated with diabetes-related strengths (r child ¼ À.38, p < .001, r parent ¼ À.29, p < .001) and parent report of child self-care skills (r parent ¼ À.13, p < .001; r child ¼ À0.07, p ¼ ns). Conclusions Initial psychometrics suggest that the PAID-C and P-PAID-C reliably and validly capture diabetes-specific emotional distress for children and their parents. Associations with glycemic control, self-care, and diabetes strengths demonstrate criterion validity. Both measures have potential applications for routine, clinic-based assessments of diabetes distress and may guide clinical decision-making.

Results support the ITP can feasibly be implemented to promote adherence among youth with SCD. All participants demonstrated increased adherence and disease knowledge. However, there was variable engagement and only intervention completers showed improvements in psychosocial outcomes. Further research is needed to evaluate long-term outcomes and ways to promote engagement in mHealth interventions among the youth.

Iron chelation therapy can prevent iron overload for pediatric patients with sickle cell disease and β-thalassemia major; however, adherence is suboptimal. Therefore, we developed an intensive training program (ITP), to improve medication management and disease knowledge. The objectives were to determine feasibility of the ITP and its preliminary impact on adherence, disease knowledge, and health outcomes. Pediatric patients were recruited to participate in the ITP over a 90-day period and were followed for 6 months. The ITP consisted of 3 components: (1) provider-led education modules; (2) patient recording daily videos of at-home medication administration; and (3) provider feedback through video messages through the ITP app. Eleven patients participated (mean=12.4 y). Initially, patients endorsed high satisfaction and ease of use and tracked their medication usage 81% (24 out of 30) of days. At 90 days, adherence rates remained consistent (80%) and disease knowledge retention was high (96%). At 6 months, participants exhibited a clinically relevant decrease in serum ferritin, which trended toward statistical significance (P=0.068). Medication possession ratio did not significantly increase (0.65 to 0.72; not significant). The mobile ITP was feasibly implemented in a clinical setting; in addition, high levels of compliance, disease knowledge retention, and acceptance encourage larger studies evaluating mobile health technology to improve child health parameters.

Twenty-five RCTs are reviewed. The majority of studies (n = 15) focused on interventions targeting both children and adolescents and their caregivers and were delivered in diabetes clinics, outpatient settings, mental health clinics, or participants' homes. Family-based interventions for youth with T1D appear effective at improving diabetes and family-centered outcomes. Additional research is needed to examine the pathways to improvement in glycemic control, as outcomes were mixed. Future research should also involve measures beyond HbA1c given new markers for sustained health improvement and outcomes are being explored.