| 1. |
- Sjöholm, H, et al.
(författare)
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Necrosis of malignant gliomas after intratumoral injection of 201Tl in vivo in the rat
- 1995
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Ingår i: Anti-Cancer Drugs. - 0959-4973. ; 6:1, s. 109-114
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Tidskriftsartikel (refereegranskat)abstract
- Fourteen adult Fischer 344 rats were inoculated in vivo unilaterally in the caudate nucleus in the brain with malignant RG 2 glioma cells. By 3 weeks a tumor with a diameter of 3-6 mm normally develops. Ten animals which survived the repeated periods of anesthesia and thallium (Tl) injections (intratumorally three times of 201Tl, 15-23 days after inoculation) showed a prolonged retention of radioactivity at the site of injection with no uptake in other organs except for the kidneys. Singular circumscribed necroses were found post-mortem at the site of injection, comprising malignant glioma tumor tissue, which in six animals was absent, in three animals was markedly reduced in size compared with controls and in one animal had the expected size. In four animals metastases were found in distant locations in the brain; in three of these cases there was a retention of radioactivity in the tumor. The selective necrotizing effect on the tumor cells is interpreted as mainly due to emission of Auger electrons from intracellularly accumulated 201Tl, giving rise to very high energy deposition in the vicinity of the cell nucleus. The results should also have implications for the treatment of human malignant gliomas.
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| 2. |
- McCulloch, Laura J, et al.
(författare)
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COL6A3 is regulated by leptin in human adipose tissue and reduced in obesity.
- 2015
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Ingår i: Endocrinology. - : The Endocrine Society. - 1945-7170 .- 0013-7227. ; 156:1, s. 134-46
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Tidskriftsartikel (refereegranskat)abstract
- Fibrosis of adipose tissue (AT) increases AT rigidity, reduces its expandability and contributes to metabolic dysfunction. Collagen type VI, alpha3 (COL6A3) encodes one subunit of a fibrotic extracellular matrix (ECM) protein highly expressed in rodent AT. Knock-out of collagen VI in rodent AT led to a significant improvement in metabolic health in obese, diabetic (ob/ob) mice however, it is unknown whether this collagen has the same metabolic significance in human AT. We therefore aimed to undertake a comprehensive assessment of COL6A3 in relation to human AT and obesity. Characterisation of COL6A3 in human AT showed 5 fold higher expression in the stromalvascular fraction compared with adipocyte expression and significantly higher expression in subcutaneous than omental AT. In both depots COL6A3 expression appeared to be lowered in obesity, whilst diet and surgery-induced weight loss increased COL6A3 expression in subcutaneous AT. Leptin treatment caused a dose dependent decrease in COL6A3 expression although no effect was seen with insulin or glucose treatment and no difference observed in subjects with diabetes. In addition, we found that the collagen expression profile in humans differs significantly from rodents as COL6A3 does not appear to be the predominant collagen in adipose, muscle or liver. Our findings oppose those initially seen in rodent studies and most importantly, demonstrate a direct regulation of COL6A3 by leptin. This highlights the importance of a paracrine leptin signalling pathway in human AT and suggests an additional mechanism by which leptin can regulate ECM composition and with it AT expandability.
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| 3. |
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| 4. |
- Andersson-Assarsson, Johanna C., 1974, et al.
(författare)
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Evolution of age-related mutation-driven clonal haematopoiesis over 20 years is associated with metabolic dysfunction in obesity
- 2023
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Ingår i: Ebiomedicine. - 2352-3964. ; 92
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Tidskriftsartikel (refereegranskat)abstract
- Background Haematopoietic clones caused by somatic mutations with >= 2% variant allele frequency (VAF) increase with age and are linked to risk of haematological malignancies and cardiovascular disease. Recent observations suggest that smaller clones (VAF<2%) are also associated with adverse outcomes. Our aims were to determine the prevalence of clonal haematopoiesis driven by clones of variable sizes in individuals with obesity treated by usual care or bariatric surgery (a treatment that improves metabolic status), and to examine the expansion of clones in relation to age and metabolic dysregulation over up to 20 years.Methods Clonal haematopoiesis-driver mutations (CHDMs) were identified in blood samples from participants of the Swedish Obese Subjects intervention study. Using an ultrasensitive assay, we analysed single-timepoint samples from 1050 individuals treated by usual care and 841 individuals who had undergone bariatric surgery, and multiple-timepoint samples taken over 20 years from a subset (n = 40) of the individuals treated by usual care.Findings In this explorative study, prevalence of CHDMs was similar in the single-timepoint usual care and bariatric surgery groups (20.6% and 22.5%, respectively, P = 0.330), with VAF ranging from 0.01% to 31.15%. Clone sizes increased with age in individuals with obesity, but not in those who underwent bariatric surgery. In the multiple-timepoint analysis, VAF increased by on average 7% (range -4% to 24%) per year and rate of clone growth was negatively associated with HDL-cholesterol (R = -0.68, 1.74 E-04).Interpretation Low HDL-C was associated with growth of haematopoietic clones in individuals with obesity treated by usual care.
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| 5. |
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| 6. |
- Fodor, Enikö, et al.
(författare)
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Glycerolkinasbrist med symtomdebut i vuxen ålder. Ovanlig orsak till koma, metabol acidos, hypoglykemi och hypotermi : [Glycerol kinase deficiency with debut of symptoms in adult age. Unusual cause of coma, metabolic acidosis, hypoglycemia and hypothermia]
- 2010
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Ingår i: Läkartidningen. - 0023-7205. ; 107:40, s. 2408-2410
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Tidskriftsartikel (refereegranskat)abstract
- Glycerolkinasbrist är en mycket ovanlig X-bunden recessiv sjukdom. Vi rapporterar här ett fall av nyupptäckt isolerad glycerolkinasbrist hos en vuxen man, som insjuknade med fulminanta och intensivvårdskrävande symtom i form av koma, grav metabol acidos, hypoglykemi och hypotermi. Sjukdomsbilden var associerad med en – för första gången beskriven – punktmutation, C332A, i exon 4 i glycerolkinasgenen.
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| 7. |
- Fodor, Enikö, et al.
(författare)
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Glycerolkinasbrist med symtomdebut i vuxen ålder. Ovanlig orsak till koma, metabol acidos, hypoglykemi och hypotermi
- 2010
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Ingår i: Läkartidningen. - 1652-7518 .- 0023-7205. ; 107:40, s. 2408-2410
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Tidskriftsartikel (refereegranskat)abstract
- Glycerolkinasbrist är en mycket ovanlig X-bunden recessiv sjukdom.Vi rapporterar här ett fall av nyupptäckt isolerad glycerolkinasbrist hos en vuxen man, som insjuknade med fulminanta och intensivvårdskrävande symtom i form av koma, grav metabol acidos, hypoglykemi och hypotermi.Sjukdomsbilden var associerad med en – för första gången beskriven – punktmutation, C332A, i exon 4 i glycerolkinasgenen.
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| 8. |
- Knol, Jeroen J, et al.
(författare)
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A study on the use of empirical models to predict the formation of acrylamide in potato crisps
- 2008
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Ingår i: Molecular Nutrition and Food Research. - : Wiley. - 1613-4133 .- 1613-4125. ; 52:3, s. 313-321
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Tidskriftsartikel (refereegranskat)abstract
- The formation of acrylamide in potato crisps was fitted by empirical mathematical models. Potato slices were fried under the same experimental conditions for different times. Besides the content of precursors in the raw potato slices, acrylamide and water content in the potato crisps were quantified after predetermined times (2-6 min). The temperature developments in the surrounding oil and outer cell layer of the potato slices were monitored, giving more insight in the frying process and making future comparisons between studies possible. The pattern found for the formation of acrylamide, which was similar to earlier studies, was fitted to three empirical models. Statistical methods were used to compare the performance of the models, with the "Logistic-Exponential" and "Empirical" model performing equally well. The obtained model parameters were in the range of earlier reported studies, although this comparison is not unequivocal as the experimental conditions differed between studies. The precision of parameter estimates was problematic; this should be improved by better experimental design. Nevertheless, the approach of this study will make it possible to truly compare acrylamide formation patterns and model parameters in the future, with the ability to develop a tool to predict acrylamide formation in potato crisps.
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| 9. |
- Kuipers, S, et al.
(författare)
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A hemolytic assay for the estimation of functional mannose-binding lectin levels in human serum
- 2002
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Ingår i: Journal of Immunological Methods. - 1872-7905. ; 268:2, s. 149-157
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Tidskriftsartikel (refereegranskat)abstract
- A simple assay was developed to estimate functional mannose-binding lectin (MBL) levels in serum based on the principle of yeast-induced bystander lysis of chicken erythrocytes (ChE). The assay is sensitive to inhibition by ethylene glycol bis-(beta-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA) (which allows alternative pathway activation), ethylene diamine tetraacetic acid (EDTA), mannose, N-acetylglucosamine and C1 esterase inhibitor (C1-INH), whereas it was not inhibited by galactose. A high-titer human anti-mannan antibody-containing serum with 0.06 mug MBL/ml gave a functional signal corresponding to 0.12 mug equivalents MBL/ml, indicating that anti-mannan antibodies are poorly hemolytic in the assay. The assay is well suited for the large-scale testing of patient samples for a functional MBL pathway of complement activation.
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