Publications by authors named "D S Sitar"

Spermidine/spermine N1-acetyltransferase 1 () responsible for cell polyamine catabolism is overexpressed in glioblastoma multiforme (GB). Its role in tumor survival and promoting resistance towards radiation therapy has made it an interesting target for therapy. In this study, we prepared a lipid nanoparticle-based siRNA delivery system (LNP-si) to selectively knockdown (KD) enzyme in a human glioblastoma cell line.

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Aim: The assessment of tumor response to therapy is of critical importance as it permits for a prospective end point evaluation and provides a guide to clinicians for making future treatment decisions. However, current practices in early evaluation of chemotherapy are insufficient. Amantadine is a substrate for .

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The objective of this research is to use metabolomic techniques to discover and validate plasma metabolite biomarkers for the diagnosis of early-stage non-small cell lung cancer (NSCLC). The study included plasma samples from 156 patients with biopsy-confirmed NSCLC along with age and gender-matched plasma samples from 60 healthy controls. A fully quantitative targeted mass spectrometry (MS) analysis (targeting 138 metabolites) was performed on all samples.

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Aim: Spermidine/spermine N-acetyltransferase (SSAT-1) regulates cell growth, proliferation and death. Amantadine is converted by SSAT-1 to acetylamantadine (AA). In our earlier studies, although SSAT-1 was activated in patients with cancer, a number of ostensibly healthy adult volunteers had higher than expected AA concentration.

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Article Synopsis
  • Lung cancer is the leading cause of cancer-related deaths globally, making early diagnosis essential for improving treatment outcomes.
  • The study investigates the use of metabolomics, specifically focusing on the SSAT-1/polyamine pathway, to differentiate between lung cancer patients and healthy individuals using plasma samples.
  • A panel of 14 metabolites was identified, achieving a high accuracy rate (0.97 AUC), suggesting it could serve as a specific diagnostic tool and aid in monitoring treatment responses for lung cancer.
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