The Apolipoprotein M/S1P Axis Controls Triglyceride Metabolism and Brown Fat Activity

Summary: Apolipoprotein M (apoM) is the carrier of sphingosine-1-phosphate (S1P) in plasma high-density lipoproteins. S1P is a bioactive lipid interacting with five receptors (S1P1–5). We show that lack of apoM in mice increases the amount of brown adipose tissue (BAT), accelerates the clearance of postprandial triglycerides, and protects against diet-induced obesity (i.e., a phenotype similar to that induced by cold exposure or β3-adrenergic stimulation). Moreover, the data suggest that the phenotype of apoM-deficient mice is S1P dependent and reflects diminished S1P1 stimulation. The results reveal a link between the apoM/S1P axis and energy metabolism. : Apolipoprotein M (apoM) is the carrier of sphingosine-1-phosphate (S1P) in lipoproteins. Christoffersen et al. show that lack of apoM in mice increases the amount of brown adipose tissue, accelerates the turnover of fat, and protects against obesity. The results reveal a link between the apoM/S1P axis and energy metabolism. Keywords: apolipoproteins, sphingolipids, sphingosine-1-phosphate, lipoproteins, lipid metabolism, triglyceride, brown adipose tissue, apo

Examining Variations in Action Plan Quality Among Adults With Type 2 Diabetes in Primary Care.

IntroductionCollaborative goal setting and action-planning are key elements of self-management support for people with type 2 diabetes mellitus (T2DM), however little is known regarding action plan quality or correlation of quality in primary T2DM care.MethodsT2DM patients from 12 primary care sites participated in either: Connection to Health (CTH; 6 practices), consisting of a health survey followed by collaborative action planning, or Enhanced Engagement CTH (EE-CTH; 6 practices), including additional training in relationship building promoting patient engagement. Action plan quality was rated using an adapted version of the Goal-Setting Evaluation Tool for Diabetes (GET-D) (dual coding of 20%, inter-rater reliability [IRR] >80%). Associations with patient characteristics were examined using generalized linear mixed models adjusting for clustering by clinic and intervention arm.ResultsWith a mean score ± standard deviation (SD) of 14.62 ± 3.87 on a 0 to 20 scale (n = 725), overall action plan quality was moderate-high. Higher health literacy (β = 1.184, 95% CI, 0.326-2.041; P = .007), and having no social risks (β = 0.416; 95% CI, 0.062-0.770; P = .021) were associated with higher action plan quality, whereas sex, age, language, education level, depression, stress, and health distress were unrelated to quality (P value not significant). Higher quality was associated with greater patient confidence in the plan (β = 0.050; 95% CI, 0.016-0.084, P = .004).ConclusionsAlthough there was a considerable difference in action plan quality ratings, ratings did not systematically differ based on most patient demographic or mental health measures. Results suggest that action planning should be tailored to health literacy and social risks. Further research should examine associations between quality and longer-term clinical outcomes