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| 2. |
- Belfrage, Per, et al.
(författare)
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Alterations of lipid metabolism in healthy volunteers during long-term ethanol intake
- 1977
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Ingår i: European Journal of Clinical Investigation. - : Wiley. - 0014-2972 .- 1365-2362. ; 7:2, s. 127-131
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Tidskriftsartikel (refereegranskat)abstract
- Nine young, healthy male volunteers were given ethanol (75 g/day) for 5 weeks. The ethanol was divided into five daily doses and taken so that blood ethanol levels never exceeded 0.04% (w/v). During the latter part of the ethanol intake period, there was a significant, transient increase of plasma triglyceride (TG) concentrations followed by reduction to normal levels. A three-fold increase of lipoprotein lipase activity (LLA) occurred in biopsy specimens of adipose tissue. An increase of alpha-lipoprotein concentrations, which correlated significantly with the decrease in plasma TG levels and the increase in adipose LLA, was also observed during the ethanol intake period. No changes were observed in plasma cholesterol and beta-lipoprotein levels. A transient, three-fold increase of TG concentrations occurred in liver biopsy specimens. Ultrastructural and cytochemical examinations of the biopsy specimens showed hyperplasia of the smooth endoplasmic reticulum, and increased canallicular activity of gamma-glutamyl transferase (gamma-GT) activity in most subjects towards the end of and after the ethanol intake period. Serum gamma-GT levels also increased significantly.
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| 3. |
- Belfrage, Per, et al.
(författare)
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Dispersion of viable pig liver cells with collagenase
- 1975
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Ingår i: Life Sciences. - : Elsevier BV. - 1879-0631 .- 0024-3205. ; 17:8, s. 1219-1225
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Tidskriftsartikel (refereegranskat)abstract
- Viable suspended hepatocytes were prepared from surgical biopsy specimens of pig and human liver by digestion with collagenase. Initial perfusion of the tissue through cannulated blood vessels with 0.5 mM EGTA followed by 0.2% collagenase gave the best results. 20−870 × 106 cells of which 60–95 % excluded trypan blue were obtained from 5–30 g pig liver pieces, while results with human liver specimens were usually less satisfactory. In some experiments, however, viable cells, as judged by vital stain exclusion and ability to synthesize lipids were obtained in sufficient yield. In the pig hepatocytes glycerolipid synthesis from [3H] glycerol and oxidation and esterification of [14C] oleic acid had the same characteristics as those observed earlier in rat hepatocytes.
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| 4. |
- Belfrage, Per, et al.
(författare)
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Methods for the determination in the nanomole range of lipids in liver fine-needle aspiration biopsies
- 1970
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Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - : Informa UK Limited. - 1502-7686 .- 0036-5513. ; 26:1, s. 53-60
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Tidskriftsartikel (refereegranskat)abstract
- Triglycerides and phospholipids 0.5-2mg (wet weight) of human liver material obtained by the fine-needle aspiration biopsy technique can be estimated after chloroform:methanol extraction by the determination of lipid phosphorus and glyceride glycerol. The methods are based on the colorimetric determination of inorganic phosphate after oxidation of the phospholipids and the enzymatic fluorometric determination of glycerol after complete hydrolysis of the triglycerides, catalyzed by purified pancreatic lipase. The accumulation of lipids is then expressed as the increase in the molar ratio of triglycerides over phospholipids.
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| 5. |
- Lundquist, A, et al.
(författare)
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Liver lipid content in alcoholics
- 1973
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Ingår i: Acta Medica Scandinavica. - 0001-6101. ; 194:6, s. 501-504
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Tidskriftsartikel (refereegranskat)
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| 6. |
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| 7. |
- Wiebe, Thomas, et al.
(författare)
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Human liver lipids: representativity of determinations on material obtained by fine-needle aspiration biopsy
- 1971
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Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - : Informa UK Limited. - 1502-7686 .- 0036-5513. ; 28:4, s. 453-457
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Tidskriftsartikel (refereegranskat)abstract
- Triglycerides and phospholipids in human liver material obtained by fine-needle aspiration biopsy have been determined according to an improved version of a previously developed method. The molar ratios of these lipids have been compared with the same ratios determined on material representing whole liver. The average value of the ratios in the fine-needle specimens was 101% (83-113%) of the corresponding whole-liver value. The variation coefficient of determinations on several fine-needle specimens from the same liver was 10% (4-17%). The least difference, between the ratiosof two consecutive fine-needle specimens, to ensure a significant difference was 30%.
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| 8. |
- Wiebe, Thomas, et al.
(författare)
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Time-course of liver fat accumulation in man after a single load of ethanol
- 1971
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Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - : Informa UK Limited. - 1502-7686 .- 0036-5513. ; 27:1, s. 33-36
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Tidskriftsartikel (refereegranskat)abstract
- Three healthy young male subjects were given a single load of ethanol (approximately 3 g/kg body weight) over 5 hours. Liver aspiration biopsies were performed at the start of the experiment and 6, 14, 24, and 48 hours after the start. Blood alcohol and serum transaminase activity levels were measured simultaneously. Triglycerides and phospholipids of the liver biopsy material were determined by a previously described method. The increase of the molar ratio triglycerides over phospholipids (TG/PL) was used to express triglyceride accumulation in the livers. At 24 hours from the start of the experiment this ratio had increased 2-5 times, and then declined to almost the initial values at 48 hours. Serum transaminases showed a slight increase over the entire experimental period. Considerable individual variation in the parameters was found. The results show that it is possible to follow time-course of rapid metabolic changes in the human liver by a combination of the fine-needle aspiration biopsy technique and biochemical micro-methods.
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