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1.
  • Abrahamsson, Annelie, et al. (författare)
  • Estradiol, Tamoxifen, and Flaxseed Alter IL-1 beta and IL-1Ra Levels in Normal Human Breast Tissue in Vivo
  • 2012
  • Ingår i: Journal of Clinical Endocrinology and Metabolism. - : Endocrine Society. - 0021-972X .- 1945-7197. ; 97:11, s. E2044-E2054
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: Sex steroid exposure increases the risk of breast cancer by unclear mechanisms. Diet modifications may be one breast cancer prevention strategy. The proinflammatory cytokine family of IL-1 is implicated in cancer progression. IL-1Ra is an endogenous inhibitor of the proinflammatory IL-1 alpha and IL-1 beta. less thanbrgreater than less thanbrgreater thanObjective: The objective of this study was to elucidate whether estrogen, tamoxifen, and/or diet modification altered IL-1 levels in normal human breast tissue. less thanbrgreater than less thanbrgreater thanDesign and Methods: Microdialysis was performed in healthy women under various hormone exposures, tamoxifen therapy, and diet modifications and in breast cancers of women before surgery. Breast tissue biopsies from reduction mammoplasties were cultured. less thanbrgreater than less thanbrgreater thanResults: We show a significant positive correlation between estradiol and in vivo levels of IL-1 beta in breast tissue and abdominal sc fat, whereas IL-1Ra exhibited a significant negative correlation with estradiol in breast tissue. Tamoxifen or a dietary addition of 25 g flaxseed per day resulted in significantly increased levels of IL-1Ra in the breast. These results were confirmed in ex vivo culture of breast biopsies. Immunohistochemistry of the biopsies did not reveal any changes in cellular content of the IL-1s, suggesting that mainly the secreted levels were affected. In breast cancer patients, intratumoral levels of IL-1 beta were significantly higher compared with normal adjacent breast tissue. less thanbrgreater than less thanbrgreater thanConclusion: IL-1 may be under the control of estrogen in vivo and may be attenuated by antiestrogen therapy and diet modifications. The increased IL-1 beta in breast cancers of women strongly suggests IL-1 as a potential therapeutic target in breast cancer treatment and prevention.
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  • Agnarsson, Hjalmar Ragnar, et al. (författare)
  • The impact of glucocorticoid replacement on bone mineral density in patients with hypopituitarism before and after 2 years of growth hormone replacement therapy.
  • 2014
  • Ingår i: The Journal of clinical endocrinology and metabolism. - 1945-7197. ; 99:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Context: Patients with hypopituitarism have reduced bone mineral density (BMD) and increased fracture risk. Objective: The aim of this study was to analyze the effects of glucocorticoid (GC) replacement on BMD before and after two years of growth hormone (GH) therapy in hypopituitary patients. The main hypothesis was that patients on GC replacement demonstrate greater improvement in BMD when treated with GH. Design: This was a post hoc analysis of data from a prospective single centre study. Patients: Data on 175 adult patients with hypopituitarism and verified GH deficiency due to non-functioning pituitary adenoma were analyzed. Ninety-eight (56%) were GC insufficient, receiving a mean±SD hydrocortisone equivalent dose of 20.9±5.0 mg/day. Main outcome measure: BMD before and after two years of GH replacement therapy, measured by using dual-energy X-ray absorptiometry. Results: BMD at baseline did not differ between GC sufficient and insufficient patients, neither at lumbar spine nor femur neck. After two years on GH replacement BMD increased in both groups. After adjustment for weight, age, gender, free T4 concentrations, change in IGF-I levels and sex hormone treatment, GC sufficiency was associated with greater increase in BMD at femur neck (ΔT-score in GC insufficient patients 0.09±0.46, in GC sufficient patients 0.19±0.43; P<0.05) but not at lumbar spine. Conclusions: GH replacement therapy for 2 years increased BMD in hypopituitary patients. In contrast to our hypothesis, GC insufficient patients receiving near physiological doses of hydrocortisone do not show a greater therapeutic response to GH therapy than their GC sufficient counterparts.
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  • Ahrén, Bo, et al. (författare)
  • Vildagliptin Enhances Islet Responsiveness to Both Hyper- and Hypoglycemia in Patients with Type 2 Diabetes.
  • 2009
  • Ingår i: Journal of Clinical Endocrinology and Metabolism. - : Oxford University Press. - 1945-7197. ; 94, s. 1236-1243
  • Tidskriftsartikel (refereegranskat)abstract
    • Context: Dipeptidyl peptidase-4 (DPP-4) inhibitors act by increasing plasma levels of glucagon-like peptide-1 (GLP-1) and suppressing excessive glucagon secretion in patients with type 2 diabetes (T2DM). However, their effects on the glucagon response to hypoglycemia are not established. Objective: Assess effects of the DPP-4 inhibitor vildagliptin on alpha-cell response to hyper- and hypoglycemia. Design: Single-center, randomized, double-blind, placebo-controlled, two-period crossover study of 28-d treatment, with a 4-wk between-period washout Setting: Participants received study drug as outpatients. Patients: Drug-naïve patients with T2DM and baseline HbA1c
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  • Albertsson-Wikland, Kerstin, et al. (författare)
  • Dose-dependent effect of growth hormone on final height in children with short stature without growth hormone deficiency
  • 2008
  • Ingår i: Journal of Clinical Endocrinology and Metabolism. - : Oxford University Press. - 0021-972X .- 1945-7197. ; 93:11, s. 4342-4350
  • Tidskriftsartikel (refereegranskat)abstract
    • CONTEXT: The effect of GH therapy in short non-GH-deficient children, especially those with idiopathic short stature (ISS), has not been clearly established owing to the lack of controlled trials continuing until final height (FH). OBJECTIVE: The aim of the study was to investigate the effect on growth to FH of two GH doses given to short children, mainly with ISS, compared with untreated controls. DESIGN AND SETTING: A randomized, controlled, long-term multicenter trial was conducted in Sweden. INTERVENTION: Two doses of GH (Genotropin) were administered, 33 or 67 microg/kg.d; control subjects were untreated. SUBJECTS: A total of 177 subjects with short stature were enrolled. Of these, 151 were included in the intent to treat (AllITT) population, and 108 in the per protocol (AllPP) population. Analysis of ISS subjects included 126 children in the ITT (ISSITT) population and 68 subjects in the PP (ISSPP) population. MAIN OUTCOME MEASURES: We measured FH sd score (SDS), difference in SDS to midparenteral height (diff MPHSDS), and gain in heightSDS. RESULTS: After 5.9+/-1.1 yr on GH therapy, the FHSDS in the AllPP population treated with GH vs. controls was -1.5+/-0.81 (33 microg/kg.d, -1.7+/-0.70; and 67 microg/kg.d, -1.4+/-0.86; P<0.032), vs. -2.4+/-0.85 (P<0.001); the diff MPHSDS was -0.2+/-1.0 vs. -1.0+/-0.74 (P<0.001); and the gain in heightSDS was 1.3+/-0.78 vs. 0.2+/-0.69 (P<0.001). GH therapy was safe and had no impact on time to onset of puberty. A dose-response relationship identified after 1 yr remained to FH for all growth outcome variables in all four populations. CONCLUSION: GH treatment significantly increased FH in ISS children in a dose-dependent manner, with a mean gain of 1.3 SDS (8 cm) and a broad range of response from no gain to 3 SDS compared to a mean gain of 0.2 SDS in the untreated controls. 
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