| 1. |
- Brunner, Eric J., et al.
(författare)
-
Appetite disinhibition rather than hunger explains genetic effects on adult BMI trajectory
- 2021
-
Ingår i: International Journal of Obesity. - : Nature Publishing Group. - 0307-0565 .- 1476-5497. ; 45, s. 758-765
-
Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND/OBJECTIVES: The mediating role of eating behaviors in genetic susceptibility to weight gain during mid-adult life is not fully understood. This longitudinal study aims to help us understand contributions of genetic susceptibility and appetite to weight gain.SUBJECTS/METHODS: We followed the body-mass index (BMI) trajectories of 2464 adults from 45 to 65 years of age by measuring weight and height on four occasions at 5-year intervals. Genetic risk of obesity (gene risk score: GRS) was ascertained, comprising 92 BMI-associated single-nucleotide polymorphisms and split at a median (=high and low risk). At the baseline, the Eating Inventory was used to assess appetite-related traits of 'disinhibition', indicative of opportunistic eating or overeating and 'hunger' which is susceptibility to/ability to cope with the sensation of hunger. Roles of the GRS and two appetite-related scores for BMI trajectories were examined using a mixed model adjusted for the cohort effect and sex.RESULTS: Disinhibition was associated with higher BMI (beta = 2.96; 95% CI: 2.66-3.25 kg/m(2)), and accounted for 34% of the genetically-linked BMI difference at age 45. Hunger was also associated with higher BMI (beta = 1.20; 0.82-1.59 kg/m(2)) during mid-life and slightly steeper weight gain, but did not attenuate the effect of disinhibition. CONCLUSIONS: Appetite disinhibition is most likely to be a defining characteristic of genetic susceptibility to obesity. High levels of appetite disinhibition, rather than hunger, may underlie genetic vulnerability to obesogenic environments in two-thirds of the population of European ancestry.
|
|
| 2. |
- Lagou, Vasiliki, et al.
(författare)
-
Sex-dimorphic genetic effects and novel loci for fasting glucose and insulin variability
- 2021
-
Ingår i: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 12:1
-
Tidskriftsartikel (refereegranskat)abstract
- Differences between sexes contribute to variation in the levels of fasting glucose and insulin. Epidemiological studies established a higher prevalence of impaired fasting glucose in men and impaired glucose tolerance in women, however, the genetic component underlying this phenomenon is not established. We assess sex-dimorphic (73,089/50,404 women and 67,506/47,806 men) and sex-combined (151,188/105,056 individuals) fasting glucose/fasting insulin genetic effects via genome-wide association study meta-analyses in individuals of European descent without diabetes. Here we report sex dimorphism in allelic effects on fasting insulin at IRS1 and ZNF12 loci, the latter showing higher RNA expression in whole blood in women compared to men. We also observe sex-homogeneous effects on fasting glucose at seven novel loci. Fasting insulin in women shows stronger genetic correlations than in men with waist-to-hip ratio and anorexia nervosa. Furthermore, waist-to-hip ratio is causally related to insulin resistance in women, but not in men. These results position dissection of metabolic and glycemic health sex dimorphism as a steppingstone for understanding differences in genetic effects between women and men in related phenotypes.
|
|
| 3. |
- Parshad, Badri, et al.
(författare)
-
Enzymatic synthesis of glycerol, azido-glycerol and azido-triglycerol based amphiphilic copolymers and their relevance as nanocarriers : a review
- 2021
-
Ingår i: European Polymer Journal. - : Elsevier. - 0014-3057 .- 1873-1945. ; 158
-
Forskningsöversikt (refereegranskat)abstract
- Amphiphilic polymeric nanocarriers have attained immense attention for transporting drugs and other bioactive species to the living systems owing to their high loading capacity and efficient internalization. To avoid the side-effects of undesired interactions within the biological system, the use of biocompatible building blocks is most crucial in preparing polymeric amphiphiles. The excellent biocompatibility and multivalency of both glycerol and triglycerol make them suitable monomers to construct macromolecular skeletons. Besides these, easy availability and remarkable aqueous solubility further enlarge their use in synthetic chemistry and give ample possibilities for creating fascinating entities for practical applications. The conversion of glycerol into azido-glycerol and azido-triglycerol further helped in differential functionalization of their polymers with various hydrophobic and hydrophilic groups in different ratios thereby assisting in tuning the amphiphilicity of resulting functionalized polymers. Herein, we review the enzymatic synthesis of glycerol, azido-glycerol and azido-triglycerol based amphiphilic polymeric architectures as nanocarriers for various bio-active species. Enzymatically synthesized linear copolymers synthesized by selective esterification of primary hydroxyl groups of glycerol and its derivatives with suitable diacids/diesters are explored in this review.
|
|
