Results 41 to 50 of about 121,912 (288)

Sparse quadratic classification rules via linear dimension reduction [PDF]

Journal of Multivariate Analysis 2019, Vol. 169, 278-299, 2017
We consider the problem of high-dimensional classification between the two groups with unequal covariance matrices. Rather than estimating the full quadratic discriminant rule, we propose to perform simultaneous variable selection and linear dimension reduction on original data, with the subsequent application of quadratic discriminant analysis on the ...
arxiv   +1 more source

Detection rate for ESR1 mutations is higher in circulating‐tumor‐cell‐derived genomic DNA than in paired plasma cell‐free DNA samples as revealed by ddPCR

Molecular Oncology, EarlyView.
Analysis of ESR1 mutations in plasma cell‐free DNA (cfDNA) is highly important for the selection of treatment in patients with breast cancer. Using multiplex‐ddPCR and identical blood draws, we investigated whether circulating tumor cells (CTCs) and cfDNA provide similar or complementary information for ESR1 mutations.
Stavroula Smilkou, Aliki Ntzifa, Victoria Tserpeli, Ioanna Balgkouranidou, Alkistis Papatheodoridi, Evangelia Razis, Helena Linardou, Christos Papadimitriou, Amanda Psyrri, Flora Zagouri, Stylianos Kakolyris, Evi Lianidou   +11 more
wiley   +1 more source

Estrogen signaling in arcuate Kiss1 neurons suppresses a sex-dependent female circuit promoting dense strong bones

Nature Communications, 2019
Estrogen promotes negative energy balance and preserves skeletal physiology. Here the authors show that loss of estrogen signalling after ablating estrogen receptor alpha (ERa) in specific hypothalamic neuronal populations leads to a marked sex-dependent
Candice B. Herber, William C. Krause, Liping Wang, James R. Bayrer, Alfred Li, Matthew Schmitz, Aaron Fields, Breanna Ford, Zhi Zhang, Michelle S. Reid, Daniel K. Nomura, Robert A. Nissenson, Stephanie M. Correa, Holly A. Ingraham   +13 more
doaj   +1 more source

Estrogen rescues heart failure through estrogen receptor Beta activation

Biology of Sex Differences, 2018
Background Recently, we showed that exogenous treatment with estrogen (E2) rescues pre-existing advanced heart failure (HF) in mice. Since most of the biological actions of E2 are mediated through the classical estrogen receptors alpha (ERα) and/or beta (
Andrea Iorga, Soban Umar, Gregoire Ruffenach, Laila Aryan, Jingyuan Li, Salil Sharma, Negar Motayagheni, Rangarajan D. Nadadur, Jean C. Bopassa, Mansoureh Eghbali   +9 more
doaj   +1 more source

Respiratory complex I‐mediated NAD+ regeneration regulates cancer cell proliferation through the transcriptional and translational control of p21Cip1 expression by SIRT3 and SIRT7

Molecular Oncology, EarlyView.
NAD+ regeneration by mitochondrial complex I NADH dehydrogenase is important for cancer cell proliferation. Specifically, NAD+ is necessary for the activities of NAD+‐dependent deacetylases SIRT3 and SIRT7, which suppress the expression of p21Cip1 cyclin‐dependent kinase inhibitor, an antiproliferative molecule, at the translational and transcriptional
Masato Higurashi, Kazunori Mori, Hidetsugu Nakagawa, Momoko Uchida, Fumihiro Ishikawa, Motoko Shibanuma   +5 more
wiley   +1 more source

Estrogen Mediates an Atherosclerotic-Protective Action via Estrogen Receptor Alpha/SREBP-1 Signaling

Frontiers in Cardiovascular Medicine, 2022
Menopause is associated with dyslipidemia and an increased risk of cardiovascular disease, the underlying mechanism of dyslipidemia is attributed to an insufficiency of estrogen. In this study, we find that estrogen mediates an atherosclerotic-protective
Fei Xie, Fei Xie, Xiandong Li, Yue Xu, Dongliang Cheng, Xianru Xia, Xi Lv, Guolin Yuan, Chunyan Peng, Chunyan Peng   +9 more
doaj   +1 more source

Multiplex single‐cell profiling of putative cancer stem cell markers ALDH1, SOX9, SOX2, CD44, CD133 and CD15 in endometrial cancer

Molecular Oncology, EarlyView.
Cancer stem cells are associated with aggressive disease, but a deep characterization of such markers is lacking in endometrial cancer. This study uses imaging mass cytometry to explore putative cancer stem cell markers in endometrial tumors and corresponding organoid models.
Hilde E. Lien, Marta E. Hjelmeland, Hege F. Berg, Rose M. Gold, Kathrine Woie, Lars A. Akslen, Ingfrid S. Haldorsen, Camilla Krakstad   +7 more
wiley   +1 more source

Branched‐chain α‐keto acids and glutamate/glutamine: Biomarkers of insulin resistance in childhood obesity

Endocrinology, Diabetes &Metabolism, Volume 6, Issue 1, January 2023., 2023
Insulin resistance (IR) in adolescents with obesity is associated with a sex‐dependent metabolic “signature” comprising the branched‐chain amino acids (BCAAs), glutamate/glutamine, C3/C5 acylcarnitines, and uric acid. Here, we compared the levels of branched‐chain α‐keto acids (BCKAs) and glutamate/glutamine, which are byproducts of BCAA catabolism, as
Pinar Gumus Balikcioglu, Catherine Jachthuber Trub, Metin Balikcioglu, Olga Ilkayeva, Phillip J. White, Michael Muehlbauer, James R. Bain, Sarah Armstrong, Michael Freemark   +8 more
wiley   +1 more source

Mammary Fat Can Adjust Prolactin Effect on Mammary Epithelial Cells via Leptin and Estrogen

International Journal of Endocrinology, 2009
Leptin, like estrogen, is one of the endo/paracrine factors, which are synthesized in and secreted from mature adipocytes. The roles of the mammary fat pad and mammary adipocytes in the initiation of lactation are not clear. In this study, we showed that
Yonatan Feuermann, Sameer J. Mabjeesh, Avi Shamay   +2 more
doaj   +1 more source

Comparative single‐cell transcriptomic profiling of patient‐derived renal carcinoma cells in cellular and animal models of kidney cancer

FEBS Open Bio, EarlyView.
We generated and characterized clear cell renal cell carcinoma models using the patient‐derived RCC243 cell line—including cell culture, orthotopic, and metastatic tumors—via single‐cell RNA‐sequencing for comparisons between models and patient tumor datasets.
Richard Huang, Lynn Kee, Alexander Gont, Jalna Meens, Fraser G. Ferens, Meredith S. Irwin, Laurie Ailles, Scott A. Yuzwa, Claire M. Robinson, Michael Ohh   +9 more
wiley   +1 more source