Weight-related differences in glucose metabolism and free fatty acid production in two South African population groups
The effects of free fatty acids (FFA), leptin, tumour necrosis factor (TNF) alpha and body fat distribution on in vivo oxidation of a glucose load were studied in two South African ethnic groups. Anthropometric and various metabolic indices were measured at fasting and during a 7 h oral glucose tole...
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| Veröffentlicht in: | International Journal of Obesity 2001-08, Vol.25 (8), p.1196-1205 |
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| creator | PUNYADEERA, C VAN DER MERWE, M-T CROWTHER, N. J TOMAN, M IMMELMAN, A. R SCHLAPHOFF, G. P GRAY, I. P |
| description | The effects of free fatty acids (FFA), leptin, tumour necrosis factor (TNF) alpha and body fat distribution on in vivo oxidation of a glucose load were studied in two South African ethnic groups.
Anthropometric and various metabolic indices were measured at fasting and during a 7 h oral glucose tolerance test (OGTT). Body composition was measured using bioelectrical impedance analysis and subcutaneous and visceral fat mass was assessed using a five- and two-level CT-scan respectively. Glucose oxidation was evaluated by measuring the ratio of (13)CO(2) to (12)CO(2) in breath following ingestion of 1-(13)C-labelled glucose.
Ten lean black women (LBW), ten obese black women (OBW), nine lean white women (LWW) and nine obese white women (OWW) were investigated after an overnight fast.
Visceral fat levels were significantly higher (P |
| doi_str_mv | 10.1038/sj.ijo.0801660 |
| format | Article |
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Anthropometric and various metabolic indices were measured at fasting and during a 7 h oral glucose tolerance test (OGTT). Body composition was measured using bioelectrical impedance analysis and subcutaneous and visceral fat mass was assessed using a five- and two-level CT-scan respectively. Glucose oxidation was evaluated by measuring the ratio of (13)CO(2) to (12)CO(2) in breath following ingestion of 1-(13)C-labelled glucose.
Ten lean black women (LBW), ten obese black women (OBW), nine lean white women (LWW) and nine obese white women (OWW) were investigated after an overnight fast.
Visceral fat levels were significantly higher (P<0.01) in obese white than black women, despite similar body mass indexes (BMIs). There were no ethnic differences in glucose oxidation however; in the lean subjects of both ethnic groups the area under the curve (AUC) was higher than in obese subjects (P<0.05 for both) and was found to correlate negatively with weight (r=-0.69, P<0.01) after correcting for age. Basal TNF alpha concentrations were similar in all groups. Percentage suppression of FFAs at 30 min of the OGTT was 24+/-12% in OWW and -38+/-23% (P<0.05) in OBW, ie the 30 min FFA level was higher than the fasting level in the latter group. AUC for FFAs during the late postprandial period (120--420 min) was significantly higher in OWW than OBW (P<0.01) and LWW (P<0.01) and correlated positively with visceral fat mass independent of age (r=0.78, P<0.05) in the OWW only. Leptin levels were higher (P<0.01) both at fasting and during the course of the OGTT in obese women from both ethnic groups compared to the lean women.
Glucose oxidation is reduced in obese subjects of both ethnic groups; inter- and intra-ethnic differences were observed in visceral fat mass and FFA production and it is possible that such differences may play a role in the differing prevalences of obesity-related disorders that have been reported in these two populations.]]></description><identifier>ISSN: 0307-0565</identifier><identifier>EISSN: 1476-5497</identifier><identifier>DOI: 10.1038/sj.ijo.0801660</identifier><identifier>PMID: 11477505</identifier><identifier>CODEN: IJOBDP</identifier><language>eng</language><publisher>Basingstoke: Nature Publishing</publisher><subject>Acid production ; Adipose Tissue - anatomy & histology ; Adult ; African Americans ; African Continental Ancestry Group ; Area Under Curve ; Biological and medical sciences ; Black people ; Body Composition ; Body fat ; Body mass index ; Body Weight ; Breath Tests ; Carbon dioxide ; Carbon Isotopes ; Cultural differences ; Diabetes ; European Continental Ancestry Group ; Fasting ; Fatty acids ; Fatty Acids, Nonesterified - biosynthesis ; Female ; Glucose ; Glucose - metabolism ; Glucose Tolerance Test ; Health sciences ; Humans ; Ingestion ; Insulin resistance ; Leptin ; Load distribution ; Medical imaging ; Medical sciences ; Metabolic diseases ; Metabolism ; Minority & ethnic groups ; Obesity ; Obesity - metabolism ; Oxidation ; South Africa - epidemiology ; Tumor Necrosis Factor-alpha ; Tumor necrosis factor-TNF ; White people ; Womens health</subject><ispartof>International Journal of Obesity, 2001-08, Vol.25 (8), p.1196-1205</ispartof><rights>2001 INIST-CNRS</rights><rights>Copyright Nature Publishing Group Aug 2001</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-c63eb5968e157a41a79085faef7d03b91d3c69586a39a59cf21230581d21a1573</citedby><cites>FETCH-LOGICAL-c316t-c63eb5968e157a41a79085faef7d03b91d3c69586a39a59cf21230581d21a1573</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1105405$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11477505$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>PUNYADEERA, C</creatorcontrib><creatorcontrib>VAN DER MERWE, M-T</creatorcontrib><creatorcontrib>CROWTHER, N. J</creatorcontrib><creatorcontrib>TOMAN, M</creatorcontrib><creatorcontrib>IMMELMAN, A. R</creatorcontrib><creatorcontrib>SCHLAPHOFF, G. P</creatorcontrib><creatorcontrib>GRAY, I. P</creatorcontrib><title>Weight-related differences in glucose metabolism and free fatty acid production in two South African population groups</title><title>International Journal of Obesity</title><addtitle>Int J Obes Relat Metab Disord</addtitle><description><![CDATA[The effects of free fatty acids (FFA), leptin, tumour necrosis factor (TNF) alpha and body fat distribution on in vivo oxidation of a glucose load were studied in two South African ethnic groups.
Anthropometric and various metabolic indices were measured at fasting and during a 7 h oral glucose tolerance test (OGTT). Body composition was measured using bioelectrical impedance analysis and subcutaneous and visceral fat mass was assessed using a five- and two-level CT-scan respectively. Glucose oxidation was evaluated by measuring the ratio of (13)CO(2) to (12)CO(2) in breath following ingestion of 1-(13)C-labelled glucose.
Ten lean black women (LBW), ten obese black women (OBW), nine lean white women (LWW) and nine obese white women (OWW) were investigated after an overnight fast.
Visceral fat levels were significantly higher (P<0.01) in obese white than black women, despite similar body mass indexes (BMIs). There were no ethnic differences in glucose oxidation however; in the lean subjects of both ethnic groups the area under the curve (AUC) was higher than in obese subjects (P<0.05 for both) and was found to correlate negatively with weight (r=-0.69, P<0.01) after correcting for age. Basal TNF alpha concentrations were similar in all groups. Percentage suppression of FFAs at 30 min of the OGTT was 24+/-12% in OWW and -38+/-23% (P<0.05) in OBW, ie the 30 min FFA level was higher than the fasting level in the latter group. AUC for FFAs during the late postprandial period (120--420 min) was significantly higher in OWW than OBW (P<0.01) and LWW (P<0.01) and correlated positively with visceral fat mass independent of age (r=0.78, P<0.05) in the OWW only. Leptin levels were higher (P<0.01) both at fasting and during the course of the OGTT in obese women from both ethnic groups compared to the lean women.
Glucose oxidation is reduced in obese subjects of both ethnic groups; inter- and intra-ethnic differences were observed in visceral fat mass and FFA production and it is possible that such differences may play a role in the differing prevalences of obesity-related disorders that have been reported in these two populations.]]></description><subject>Acid production</subject><subject>Adipose Tissue - anatomy & histology</subject><subject>Adult</subject><subject>African Americans</subject><subject>African Continental Ancestry Group</subject><subject>Area Under Curve</subject><subject>Biological and medical sciences</subject><subject>Black people</subject><subject>Body Composition</subject><subject>Body fat</subject><subject>Body mass index</subject><subject>Body Weight</subject><subject>Breath Tests</subject><subject>Carbon dioxide</subject><subject>Carbon Isotopes</subject><subject>Cultural differences</subject><subject>Diabetes</subject><subject>European Continental Ancestry Group</subject><subject>Fasting</subject><subject>Fatty acids</subject><subject>Fatty Acids, Nonesterified - biosynthesis</subject><subject>Female</subject><subject>Glucose</subject><subject>Glucose - metabolism</subject><subject>Glucose Tolerance Test</subject><subject>Health sciences</subject><subject>Humans</subject><subject>Ingestion</subject><subject>Insulin resistance</subject><subject>Leptin</subject><subject>Load distribution</subject><subject>Medical imaging</subject><subject>Medical sciences</subject><subject>Metabolic diseases</subject><subject>Metabolism</subject><subject>Minority & ethnic groups</subject><subject>Obesity</subject><subject>Obesity - metabolism</subject><subject>Oxidation</subject><subject>South Africa - epidemiology</subject><subject>Tumor Necrosis Factor-alpha</subject><subject>Tumor necrosis factor-TNF</subject><subject>White people</subject><subject>Womens health</subject><issn>0307-0565</issn><issn>1476-5497</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpNkE2LFDEQhoMo7rh69ShBvPZY6UzSneOy-AULHlQ8NjVJZTZNT6dN0sr-ezNsg57qUM_7VvEw9lrAXoDs3-dxH8a4hx6E1vCE7cSh0406mO4p24GErgGl1RV7kfMIAEpB-5xdiUp1CtSO_f5J4XRfmkQTFnLcBe8p0Wwp8zDz07TamImfqeAxTiGfOc6O-0TEPZbywNEGx5cU3WpLiPMlVP5E_i2u5Z7f-BQsznyJy1r7L_tTiuuSX7JnHqdMr7Z5zX58_PD99nNz9_XTl9ubu8ZKoUtjtaSjMronoTo8COwM9Moj-c6BPBrhpNVG9RqlQWWsb0UrQfXCtQJrRF6zt4-99cNfK-UyjHFNcz05tMK0vZFaVWj_CNkUc07khyWFM6aHQcBwsTzkcaiWh81yDbzZWtfjmdw_fNNagXcbgNni5BPONuT_OFCHiv0FavGGuw</recordid><startdate>20010801</startdate><enddate>20010801</enddate><creator>PUNYADEERA, C</creator><creator>VAN DER MERWE, M-T</creator><creator>CROWTHER, N. 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J</au><au>TOMAN, M</au><au>IMMELMAN, A. R</au><au>SCHLAPHOFF, G. P</au><au>GRAY, I. P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Weight-related differences in glucose metabolism and free fatty acid production in two South African population groups</atitle><jtitle>International Journal of Obesity</jtitle><addtitle>Int J Obes Relat Metab Disord</addtitle><date>2001-08-01</date><risdate>2001</risdate><volume>25</volume><issue>8</issue><spage>1196</spage><epage>1205</epage><pages>1196-1205</pages><issn>0307-0565</issn><eissn>1476-5497</eissn><coden>IJOBDP</coden><abstract><![CDATA[The effects of free fatty acids (FFA), leptin, tumour necrosis factor (TNF) alpha and body fat distribution on in vivo oxidation of a glucose load were studied in two South African ethnic groups.
Anthropometric and various metabolic indices were measured at fasting and during a 7 h oral glucose tolerance test (OGTT). Body composition was measured using bioelectrical impedance analysis and subcutaneous and visceral fat mass was assessed using a five- and two-level CT-scan respectively. Glucose oxidation was evaluated by measuring the ratio of (13)CO(2) to (12)CO(2) in breath following ingestion of 1-(13)C-labelled glucose.
Ten lean black women (LBW), ten obese black women (OBW), nine lean white women (LWW) and nine obese white women (OWW) were investigated after an overnight fast.
Visceral fat levels were significantly higher (P<0.01) in obese white than black women, despite similar body mass indexes (BMIs). There were no ethnic differences in glucose oxidation however; in the lean subjects of both ethnic groups the area under the curve (AUC) was higher than in obese subjects (P<0.05 for both) and was found to correlate negatively with weight (r=-0.69, P<0.01) after correcting for age. Basal TNF alpha concentrations were similar in all groups. Percentage suppression of FFAs at 30 min of the OGTT was 24+/-12% in OWW and -38+/-23% (P<0.05) in OBW, ie the 30 min FFA level was higher than the fasting level in the latter group. AUC for FFAs during the late postprandial period (120--420 min) was significantly higher in OWW than OBW (P<0.01) and LWW (P<0.01) and correlated positively with visceral fat mass independent of age (r=0.78, P<0.05) in the OWW only. Leptin levels were higher (P<0.01) both at fasting and during the course of the OGTT in obese women from both ethnic groups compared to the lean women.
Glucose oxidation is reduced in obese subjects of both ethnic groups; inter- and intra-ethnic differences were observed in visceral fat mass and FFA production and it is possible that such differences may play a role in the differing prevalences of obesity-related disorders that have been reported in these two populations.]]></abstract><cop>Basingstoke</cop><pub>Nature Publishing</pub><pmid>11477505</pmid><doi>10.1038/sj.ijo.0801660</doi><tpages>10</tpages></addata></record> |
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| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature - Complete Springer Journals; Nature Journals Online |
| subjects | Acid production Adipose Tissue - anatomy & histology Adult African Americans African Continental Ancestry Group Area Under Curve Biological and medical sciences Black people Body Composition Body fat Body mass index Body Weight Breath Tests Carbon dioxide Carbon Isotopes Cultural differences Diabetes European Continental Ancestry Group Fasting Fatty acids Fatty Acids, Nonesterified - biosynthesis Female Glucose Glucose - metabolism Glucose Tolerance Test Health sciences Humans Ingestion Insulin resistance Leptin Load distribution Medical imaging Medical sciences Metabolic diseases Metabolism Minority & ethnic groups Obesity Obesity - metabolism Oxidation South Africa - epidemiology Tumor Necrosis Factor-alpha Tumor necrosis factor-TNF White people Womens health |
| title | Weight-related differences in glucose metabolism and free fatty acid production in two South African population groups |
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