Regulation and roles of bicarbonate transporters in cancer
Autor: | Andrej Gorbatenko, Christina W. Olesen, Ebbe Boedtkjer, Stine F. Pedersen |
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Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
Pathology
medicine.medical_specialty Physiology acid-base regulation Bicarbonate Intracellular pH intracellular pH Biology Hypothesis And Theory Article SLC4A7 lcsh:Physiology ion transport chemistry.chemical_compound Physiology (medical) Proton transport medicine Tumor microenvironment lcsh:QP1-981 Bicarbonate transport Cancer medicine.disease DRA Cell biology Transport protein NBCn1 chemistry Cancer cell |
Zdroj: | Frontiers in Physiology Aarhus University Gorbatenko, A, Olesen, C W, Bødtkjer, E & Pedersen, S H F 2014, ' Regulation and roles of bicarbonate transporters in cancer ', Frontiers in Physiology, vol. 5, 130 . https://doi.org/10.3389/fphys.2014.00130 Frontiers in Physiology, Vol 5 (2014) Gorbatenko, A, Olesen, C W, Boedtkjer, E & Pedersen, S H F 2014, ' Regulation and roles of bicarbonate transporters in cancer ', Frontiers in Physiology, vol. 5, 130, pp. 1-15 . |
ISSN: | 1664-042X |
Popis: | A unifying feature of solid tumors is a markedly altered pH profile compared to normal tissues. This reflects that solid tumors, despite completely different origins, often share several phenotypic properties with implications for intra- and extracellular pH. These include: a metabolic shift in most cancer cells toward more acid-producing pathways, reflecting both oncogenic signaling and the development of hypoxia in poorly perfused regions of the tumors; the poorly perfused and often highly dense tumor microenvironment, reducing the diffusive flux of acid equivalents compared to that in normal tissues; and the markedly altered regulation of the expression and activity of pH-regulatory transport proteins in cancer cells. While some of these properties of tumors have been well described in recent years, the great majority of the research in this clinically important area has focused on proton transport, in particular via the Na(+)/H(+) exchanger 1 (SLC9A1, NHE1) and various H(+) ATPases. We have, however, recently demonstrated that at least under some conditions, including in vitro models of HER2 positive breast cancer, and measurements obtained directly in freshly dissected human mammary carcinomas, bicarbonate transporters such as the electroneutral Na(+), HCO(-) 3 cotransporter (SLC4A7, NBCn1), are upregulated and play central roles in pH regulation. In this review, we summarize and discuss the current knowledge regarding the regulation and roles of bicarbonate transporters in cancer. Furthermore, we present new analyses of publicly available expression data demonstrating widely altered expression levels of SLC4- and SLC26 family transporters in breast-, lung-, and colon cancer patients, and we hypothesize that bicarbonate transporter dysregulation may have both diagnostic and therapeutic potential in cancer treatment. |
Databáze: | OpenAIRE |
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