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Sökning: WFRF:(Mitsiades Nicholas)

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  • Petridou, Eleni T., et al. (författare)
  • Circulating adiponectin levels and expression of adiponectin receptors in relation to lung cancer : two case-control studies
  • 2007
  • Ingår i: Oncology. - 0030-2414 .- 1423-0232. ; 73:3-4, s. 261-269
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>BACKGROUND: Decreased circulating levels of adiponectin, an adipocyte-secreted hormone and endogenous insulin sensitizer, have been associated with several obesity-related malignancies. Thiazolidinedione administration, which increases adiponectin levels, decreases risk for lung cancer. Whether circulating adiponectin levels are associated with lung cancer and/or whether adiponectin receptors are expressed in lung cancer remains unknown. METHODS: We conducted a case-control study of 85 patients with incidental, histologically confirmed lung cancer and 170 healthy controls matched by gender and age. In a separate study, archival lung specimens from 134 cancerous and 8 noncancerous tissues were examined for relative expression of adiponectin receptors AdipoR1 and AdipoR2 using immunohistochemistry. RESULTS: Tobacco smoking, heavy alcohol intake and education were all associated with lung cancer risk, whereas serum adiponectin levels were not significantly different between cases and controls (multiple logistic regression, odds ratio per SD of adiponectin among controls: 1.13, 95% confidence interval: 0.64-2.02). Adiponectin levels were significantly lower (odds ratio: 0.25, 95% confidence interval: 0.10-0.78) among patients with advanced compared to those with limited disease stage. Expression of adiponectin receptors was apparent only in the cancerous lung tissue (64.2% AdipoR1 and 61.9% AdipoR2 in cancerous vs. 0% among noncancerous tissue). Specifically, AdipoR1 was expressed in all disease types, but no difference was noted with disease stage, whereas AdipoR2 was mainly expressed in the non-small cell carcinomas and more prominently in the advanced disease stage (80%). CONCLUSIONS: Circulating adiponectin levels are not different in cases of this malignancy - which seems to be unrelated to obesity and insulin resistance - compared to their healthy controls, though hormonal levels were significantly lower in advanced versus limited lung cancer. Both adiponectin receptors were expressed in cancerous lung tissue, but not in normal control tissue and there was a differential expression by disease stage. These findings should be further explored, especially in the context of the recently reported protective effect of thiazolidinediones in diabetic patients with lung cancer.</p>
  • Thorek, Daniel L.J., et al. (författare)
  • Harnessing androgen receptor pathway activation for targeted alpha particle radioimmunotherapy of breast cancer
  • 2019
  • Ingår i: Clinical Cancer Research. - American Association for Cancer Research. - 1078-0432. ; 25:2, s. 881-891
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: The impact of androgen receptor (AR) activity Results: D-Norgestrel and DHT activated the AR pathway, in breast cancer biology is unclear. We characterized and while 17b-Estradiol did not. Competitive binding for AR tested a novel therapy to an AR-governed target in breast protein showed similar affinity between DHT and D-Norges-cancer. trel, indicating direct AR–ligand interaction. In vivo production Experimental Design: We evaluated the expression of of hK2 was sufficient to achieve site-specific delivery of ther-prototypical AR gene products human kallikrein 2 (hK2) apeutic radionuclide to tumor tissue at >20-fold over back- and PSA in breast cancer models. We screened 13 well-ground muscle uptake; effecting long-term local tumor characterized breast cancer cell lines for hK2 and PSA control. production upon in vitro hormone stimulation by testoster-Conclusions: [225Ac]hu11B6 targeted radiotherapy one [dihydrotestosterone (DHT)]. AR-positive lines were was potentiated by DHT and by D-Norgestrel in murine further evaluated by exposure to estrogen (17b-Estradiol) xenograft models of breast cancer. AR activity in and the synthetic progestin D-Norgestrel. We then evaluated breast cancer correlates with kallikrein-related peptidase-2 an anti-hK2–targeted radiotherapy platform (hu11B6), and can be activated by D-Norgestrel, a common con-labeled with alpha (a)-particle emitting Actinium-225, to traceptive, and AR induction can be harnessed for hK2-specifically treat AR-expressing breast cancer xenografts targeted breast cancer a-emitter radiotherapy. under hormone stimulation.
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