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- Lazaridis, Iosif, et al.
(författare)
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Ancient human genomes suggest three ancestral populations for present-day Europeans
- 2014
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 513:7518, s. 409-
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Tidskriftsartikel (refereegranskat)abstract
- We sequenced the genomes of a similar to 7,000-year-old farmer from Germany and eight similar to 8,000-year-old hunter-gatherers from Luxembourg and Sweden. We analysed these and other ancient genomes(1-4) with 2,345 contemporary humans to show that most present-day Europeans derive from at least three highly differentiated populations: west European hunter-gatherers, who contributed ancestry to all Europeans but not to Near Easterners; ancient north Eurasians related to Upper Palaeolithic Siberians(3), who contributed to both Europeans and Near Easterners; and early European farmers, who were mainly of Near Eastern origin but also harboured west European hunter-gatherer related ancestry. We model these populations' deep relationships and show that early European farmers had similar to 44% ancestry from a 'basal Eurasian' population that split before the diversification of other non-African lineages.
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3. |
- Alba, M., et al.
(författare)
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Sitagliptin and pioglitazone provide complementary effects on postprandial glucose and pancreatic islet cell function
- 2013
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Ingår i: Diabetes, Obesity and Metabolism. - : Wiley. - 1462-8902. ; 15:12, s. 1101-1110
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Tidskriftsartikel (refereegranskat)abstract
- AimsThe effects of sitagliptin and pioglitazone, alone and in combination, on - and -cell function were assessed in patients with type 2 diabetes. MethodsFollowing a 6-week diet/exercise period, 211 patients with HbA1c of 6.5-9.0% and fasting plasma glucose of 7.2-14.4mmol/l were randomized (1:1:1:1) to sitagliptin, pioglitazone, sitagliptin+pioglitazone or placebo. At baseline and after 12weeks, patients were given a mixed meal followed by frequent blood sampling for measurements of glucose, insulin, C-peptide and glucagon. ResultsAfter 12weeks, 5-h glucose total area under the curve (AUC) decreased in all active treatments versus placebo; reduction with sitagliptin+pioglitazone was greater versus either monotherapy. The 5-h insulin total AUC increased with sitagliptin versus all other treatments and increased with sitagliptin+pioglitazone versus pioglitazone. The 3-h glucagon AUC decreased with sitagliptin versus placebo and decreased with sitagliptin+pioglitazone versus pioglitazone or placebo. (s), a measure of dynamic -cell responsiveness to above-basal glucose concentrations, increased with either monotherapy versus placebo and increased with sitagliptin+pioglitazone versus either monotherapy. The insulin sensitivity index (ISI), a composite index of insulin sensitivity, improved with pioglitazone and sitagliptin+pioglitazone versus placebo. The disposition index, a measure of the relationship between -cell function and insulin sensitivity, improved with all active treatments versus placebo. ConclusionsSitagliptin and pioglitazone enhanced -cell function (increasing postmeal phi(s)), and sitagliptin improved -cell function (decreasing postmeal glucagon) after 12weeks in patients with type 2 diabetes. Through these complementary mechanisms of action, the combination of sitagliptin and pioglitazone reduced postmeal glucose more than either treatment alone.
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