Macrolides selectively inhibit mutant KCNJ5 potassium channels that cause aldosterone-producing adenoma
| العنوان: | Macrolides selectively inhibit mutant KCNJ5 potassium channels that cause aldosterone-producing adenoma |
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| المؤلفون: | Ute I. Scholl, Richard P. Lifton, Laura Abriola, Mark Plummer, Chengbiao Zhang, Esther N. Reimer, Barbara I. Kazmierczak, Wen-Hui Wang, Denton Hoyer, Junhui Zhang, Jane S. Merkel |
| المصدر: | Journal of Clinical Investigation. 127:2739-2750 |
| بيانات النشر: | American Society for Clinical Investigation, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Adenoma, Aldosterone synthase, medicine.medical_specialty, medicine.medical_treatment, Adrenal Gland Neoplasms, Mutation, Missense, 030209 endocrinology & metabolism, 030204 cardiovascular system & hematology, Pharmacology, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Cell Line, Tumor, Internal medicine, KCNJ5, medicine, Cytochrome P-450 CYP11B2, Humans, Aldosterone, biology, Chemistry, Adrenal gland, Roxithromycin, General Medicine, medicine.disease, Potassium channel, Neoplasm Proteins, Steroid hormone, HEK293 Cells, medicine.anatomical_structure, Endocrinology, Amino Acid Substitution, G Protein-Coupled Inwardly-Rectifying Potassium Channels, biology.protein, Macrolides, Research Article, medicine.drug |
| الوصف: | Aldosterone-producing adenomas (APAs) are benign tumors of the adrenal gland that constitutively produce the salt-retaining steroid hormone aldosterone and cause millions of cases of severe hypertension worldwide. Either of 2 somatic mutations in the potassium channel KCNJ5 (G151R and L168R, hereafter referred to as KCNJ5MUT) in adrenocortical cells account for half of APAs worldwide. These mutations alter channel selectivity to allow abnormal Na+ conductance, resulting in membrane depolarization, calcium influx, aldosterone production, and cell proliferation. Because APA diagnosis requires a difficult invasive procedure, patients often remain undiagnosed and inadequately treated. Inhibitors of KCNJ5MUT could allow noninvasive diagnosis and therapy of APAs carrying KCNJ5 mutations. Here, we developed a high-throughput screen for rescue of KCNJ5MUT-induced lethality and identified a series of macrolide antibiotics, including roxithromycin, that potently inhibit KCNJ5MUT, but not KCNJ5WT. Electrophysiology demonstrated direct KCNJ5MUT inhibition. In human aldosterone-producing adrenocortical cancer cell lines, roxithromycin inhibited KCNJ5MUT-induced induction of CYP11B2 (encoding aldosterone synthase) expression and aldosterone production. Further exploration of macrolides showed that KCNJ5MUT was similarly selectively inhibited by idremcinal, a macrolide motilin receptor agonist, and by synthesized macrolide derivatives lacking antibiotic or motilide activity. Macrolide-derived selective KCNJ5MUT inhibitors thus have the potential to advance the diagnosis and treatment of APAs harboring KCNJ5MUT. |
| تدمد: | 1558-8238 0021-9738 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24c2b43d03defd3ce83f87373386ccc8 https://doi.org/10.1172/jci91733 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....24c2b43d03defd3ce83f87373386ccc8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15588238 00219738 |
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