title: Fatty acid profiles of blood lipids in a population group in Tibet: correlations with diet and environmental conditions.
abstract: The aim of this study was to compare blood fatty acid profiles of two population groups: Italian and Tibetan, differing with regard to ethnic, life style and environmental aspects. Additionally the collection of two staple foods provided the opportunity to analyze typical Tibetan dishes. A new, simple, rapid, and substantially non invasive method for fatty acid (FA) analysis of blood lipids was applied to healthy Italian (n=14) and Tibetan (n=13) subjects. Blood drops obtained from the ear lobe of Tibetans or the fingertip of Italians were adsorbed by a special strip of paper and processed for fatty acid analysis. The fatty acid profiles of the two groups are different, and environmental factors, such as dietary fats and altitudes of Milan, Italy (a low altitude site), and Lhasa, Tibet (a high altitude site) appear to contribute to these differences. More specifically, in Ti-betans higher levels of monounsaturated fatty acids, including the 22 and 24 carbon molecules, were found. This appears to be derived mainly from locally consumed fats (mustard seed oil), and are associated with lower levels of total polyunsaturated fatty acids and higher levels of selected omega 3 fatty acids, when compared to the Italians. These relatively higher levels of monounsaturated fatty acids may also indicate means of adaptation to local prooxidant conditions. The observed differences in blood fatty acid profiles in Tibetans vs. Italians appear to result both from dietary factors and adaptation to local environmental conditions such as the high altitude of the Tibetan location.
authors: Department of Pharmacological Sciences-Via Balzaretti 9-20133 Milan, Italy.
authors: Patrizia
authors: P
authors: Risé
authors: Franca
authors: F
authors: Marangoni
authors: Antonella
authors: A
authors: Martiello
authors: Claudio
authors: C
authors: Colombo
authors: Cristina
authors: C
authors: Manzoni
authors: Claudio
authors: C
authors: Marconi
authors: Flaminio
authors: F
authors: Cattabeni
authors: Claudio
authors: C
authors: Galli
mesh_terms: D000328:Adult; D000531:Altitude; D003431:Cross-Cultural Comparison; D004777:Environment; D005227:Fatty Acids / Q000032:analysis*; D005229:Fatty Acids, Monounsaturated / Q000032:analysis; D005247:Feeding Behavior / Q000208:ethnology; D006801:Humans; D007558:Italy; D008019:Life Style; D008055:Lipids / Q000097:blood* / Q000737:chemistry*; D008297:Male; D009149:Mustard Plant / Q000378:metabolism; D010938:Plant Oils / Q000008:administration & dosage / Q000378:metabolism; D018609:Tibet
chemical_list: D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D008055:Lipids; D010938:Plant Oils; C027793:mustard oil