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Filename: controllers/Detail.php
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The barrier function of the human mammary gland collapses if challenged with cationic drugs, causing their accumulation in milk. However, underlying molecular mechanisms are not well understood. To gain insight into the mechanism, we characterized transport of organic cations in the MCF12A human mammary gland epithelial cells, using carnitine and tetraethylammonium (TEA) as representative nutrient and xenobiotics probes, respectively. Our results show that the mammary gland cells express mRNA and proteins of human (h) novel organic cation transporters (OCTN) 1 and hOCTN2 (a Na+-dependent carnitine carrier with Na+-independent xenobiotics transport function), which belong to the solute carrier superfamily (SLC) of transporters. Other SLC OCTs such as hOCT1 and extraneuronal monoamine transporter (EMT)/hOCT3 are also expressed at mRNA levels, but hOCT2 was undetectable. We further showed mRNA expression of ATB0+ (an amino acid transporter with a Na+/Cl(-)-dependent carnitine transport activity), and Fly-like putative transporter 2/OCT6 (a splice variant of carnitine transporter 2: a testis-specific Na+-dependent carnitine transporter). TEA uptake was pH dependent. Carnitine uptake was dependent on Na+, and partly on Cl-, compatible with hOCTN2 and ATB0+ function. Modeling analyses predicted multiplicity of the uptake mechanisms with the high-affinity systems characterized by K(m) of 5.1 microM for carnitine and 1.6 mM for TEA, apparently similar to the reported hOCTN2 parameter for carnitine, and that of EMT/hOCT3 for TEA. Verapamil, cimetidine, carbamazepine, quinidine, and desipramine inhibited the carnitine uptake but required supratherapeutic concentrations, suggesting robustness of the carnitine uptake systems against xenobiotic challenge. Our findings suggest functional roles of a network of multiple SLC organic cation/nutrient transporters in human mammary gland drug transfer.
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http://dx.doi.org/10.1152/ajpregu.00087.2005 | DOI Listing |
Chem Commun (Camb)
December 2024
Department of Life Science and Technology, Institute of Science Tokyo, Nagatsuta 4259, Midori-ku, Yokohama 226-8501, Japan.
Extracellular vesicles (EVs) from cancer cells promote abnormal growth in normal cells, potentially leading to cancer proliferation. We developed a nanowire-based EV-elimination device that efficiently eliminated EVs without toxicity. This method restored normal growth in mammary gland cells cultured with breast adenocarcinoma-derived EVs containing medium treated with the device.
View Article and Find Full Text PDFBackground: In order to obtain a natural but athletic contour through liposuction, the management of the male pectoral region is constantly changing. Cutting-edge methods including mammary gland excision and fat grafting to the pectoralis major have been created. There isn't yet a single method that can handle all long-term problems, like gynecomastia with eventual loss of pectoral definition, fat graft asymmetries, and/or unnatural definition.
View Article and Find Full Text PDFInn Med (Heidelb)
December 2024
Klinische Andrologie des Centrum für Reproduktionsmedizin und Andrologie, Universitätsklinikum Münster, Domagkstr. 11, 48149, Münster, Deutschland.
Testosterone is a natural hormone which is an essential factor to maintain the physical and emotional well-being in men, regardless of age. Male hypogonadism is an endocrinal condition of testosterone deficiency with the potential to cause multiple physical complaints and psychosocial problems. The condition can be of primary (due to testicular injury), secondary (due to diseases of the hypothalamus or pituitary gland) or functional nature (due to comorbidities, such as inflammatory diseases, obesity, type 2 diabetes mellitus).
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
College of Animal Medicine, Gansu Agricultural University, China; College of Zoology, Northwest Agriculture and Forestry University, China. Electronic address:
Background: Ruminants possess a rich repository of natural antimicrobial peptides(AMPs) within their bodies, surpassing those found in humans and mice. These peptides, including Defensin, Cathelicidin, and Lysozyme, are integral to the body's innate and adaptive immune responses and represent promising alternatives to antibiotics with significant application potential.
Results: In the present study, we conducted a systematic analysis of 40 Defensins, 38 Cathelicidins, and 61 Lysozymes in cattle and sheep.
Res Vet Sci
December 2024
Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, United States of America.
Delayed milk ejection (DME) could compromise udder health and milking performance. The objectives of this systematic review and meta-analysis were to (i) explore the current evidence, assess the risk of bias, and identify the knowledge gaps in published studies that investigated the effect of DME on udder health and milking performance in dairy cows, and (ii) quantify the magnitude of the difference in milk yield per milking session (MY), milking duration (MD), and peak milk flow rate (PFR) between cows with and without DME. We performed the current systematic review and meta-analysis according to PRISMA 2020 statement.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!