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Anract J, Baures M, Barry Delongchamps N, Capiod T. Microcalcifications, calcium-sensing receptor, and cancer. Cell Calcium 2019; 82:102051. [PMID: 31276858 DOI: 10.1016/j.ceca.2019.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/13/2019] [Accepted: 06/13/2019] [Indexed: 12/20/2022]
Abstract
Calcium stones and calculi are observed in numerous human tissues. They are the result of deposition of calcium salts and are due to high local calcium concentrations. Prostatic calculi are usually classified as endogenous or extrinsic stones. Endogenous stones are commonly caused by obstruction of the prostatic ducts around an enlarged prostate resulting from benign prostatic hyperplasia or from chronic inflammation. The latter occurs mainly around the urethra and is generally caused by reflux of urine into the prostate. Calcium concentrations higher than in the plasma at sites of infection may induce the chemotactic response that eventually leads to recruitment of inflammatory cells. The calcium sensing receptor (CaSR) may be crucial for this recruitment as its expression and activity are increased by cytokines such as IL-6 and high extracellular calcium concentrations, respectively. The links between calcium calculi, inflammation, calcium supplementation, and CaSR functions in prostate cancer patients will be discussed in this review.
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Affiliation(s)
- Julien Anract
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France; Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris 75014, France
| | - Manon Baures
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France
| | - Nicolas Barry Delongchamps
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France; Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris 75014, France
| | - Thierry Capiod
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France.
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Haynes JM, Selby JN, Vandekolk TH, Abad IPL, Ho JK, Lieuw WL, Leach K, Savige J, Saini S, Fisher CL, Ricardo SD. Induced Pluripotent Stem Cell-Derived Podocyte-Like Cells as Models for Assessing Mechanisms Underlying Heritable Disease Phenotype: Initial Studies Using Two Alport Syndrome Patient Lines Indicate Impaired Potassium Channel Activity. J Pharmacol Exp Ther 2018; 367:335-347. [PMID: 30104322 DOI: 10.1124/jpet.118.250142] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/26/2018] [Indexed: 12/22/2022] Open
Abstract
Renal podocyte survival depends upon the dynamic regulation of a complex cell architecture that links the glomerular basement membrane to integrins, ion channels, and receptors. Alport syndrome is a heritable chronic kidney disease where mutations in α3, α4, or α5 collagen genes promote podocyte death. In rodent models of renal failure, activation of the calcium-sensing receptor (CaSR) can protect podocytes from stress-related death. In this study, we assessed CaSR function in podocyte-like cells derived from induced-pluripotent stem cells from two patients with Alport Syndrome (AS1 & AS2) and a renal disease free individual [normal human mesangial cell (NHMC)], as well as a human immortalized podocyte-like (HIP) cell line. Extracellular calcium elicited concentration-dependent elevations of intracellular calcium in all podocyte-like cells. NHMC and HIP, but not AS1 or AS2 podocyte-like cells, also showed acute reductions in intracellular calcium prior to elevation. In NHMC podocyte-like cells this acute reduction was blocked by the large-conductance potassium channel (KCNMA1) inhibitors iberiotoxin (10 nM) and tetraethylammonium (5 mM), as well as the focal adhesion kinase inhibitor PF562271 (N-methyl-N-(3-((2-(2-oxo-2,3-dihydro-1H-indol-5-ylamino)-5-trifluoromethyl-pyrimidin-4-ylamino)-methyl)-pyridin-2-yl)-methanesulfonamide, 10 nM). Quantitative polymerase chain reaction (qPCR) and immunolabeling showed the presence of KCNMA1 transcript and protein in all podocyte-like cells tested. Cultivation of AS1 podocytes on decellularized plates of NHMC podocyte-like cells partially restored acute reductions in intracellular calcium in response to extracellular calcium. We conclude that the AS patient-derived podocyte-like cells used in this study showed dysfunctional integrin signaling and potassium channel function, which may contribute to podocyte death seen in Alport syndrome.
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Affiliation(s)
- John M Haynes
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - James N Selby
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Teresa H Vandekolk
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Isaiah P L Abad
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Joan K Ho
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Wai-Ling Lieuw
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Katie Leach
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Judith Savige
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Sheetal Saini
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Craig L Fisher
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
| | - Sharon D Ricardo
- Monash Institute of Pharmaceutical Sciences (J.M.H., J.N.S., T.H.V., I.P.L.A., J.K.H., W.-L.L., K.L.) and Department of Anatomy and Developmental Biology (S.S., C.L.F., S.D.R.), Monash University, Victoria, Australia; and Department of Medicine, Royal Melbourne Hospital, Victoria, Australia (J.S.)
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Moss CR, Gilbert CA, Gabriel SA, Gu Q. Protease-activated receptor-2 inhibits BK channel activity in bronchopulmonary sensory neurons. Neurosci Lett 2015; 589:13-8. [PMID: 25578948 DOI: 10.1016/j.neulet.2015.01.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/27/2014] [Accepted: 01/07/2015] [Indexed: 11/17/2022]
Abstract
Activation of protease-activated receptor-2 (PAR2) contributes to airway inflammation and airway hypersensitivity, the hallmark features of allergic asthma; and a neurogenic mechanism involving hypersensitivity of bronchopulmonary sensory nerves has been indicated. Large-conductance Ca(2+)-activated potassium (BK) channels are known to play an important role in shaping neuronal excitability. The aim of this study was to investigate the potential regulation of BK channel activities by PAR2 activation in vagal bronchopulmonary sensory neurons. Our results showed that pretreatment with PAR2-activating peptide (PAR2-AP; 100μM, 120s), but not its control peptide PAR2-RP, significantly reduced BK current density in these neurons. Inhibition of phospholipase C, PKC, PKA or MEK/ERK signaling pathway did not prevent the suppression of BK current by PAR2 activation; whereas intracellular application of Ca(2+) chelator BAPTA-AM completely abolished the PAR2 regulation of BK current. In addition, our results demonstrated that activation of PAR2 increased excitability of bronchopulmonary sensory neurons, in a similar manner as displayed by a direct BK channel blockade. In summary, our data suggest that suppression of BK channel activity contributes to PAR2 activation-induced hyperexcitability of vagal bronchopulmonary sensory neurons.
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Affiliation(s)
- Charles R Moss
- Division of Basic Medical Sciences, Mercer University School of Medicine, 1550 College Street, Macon, GA 31207, USA
| | - Carolyn A Gilbert
- Division of Basic Medical Sciences, Mercer University School of Medicine, 1550 College Street, Macon, GA 31207, USA
| | - Sabry A Gabriel
- Department of Family Medicine, Mercer University School of Medicine and Medical Center of Central Georgia, Macon, GA 31207, USA
| | - Qihai Gu
- Division of Basic Medical Sciences, Mercer University School of Medicine, 1550 College Street, Macon, GA 31207, USA
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