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Pàgina inicial > Articles > Articles publicats > In situ monitoring of PTHLH secretion in neuroblastoma cells cultured onto nanoporous membranes |
Data: | 2018 |
Resum: | In this work, we propose for the first time the use of anodic aluminum oxide (AAO) nanoporous membranes for in situ monitoring of parathyroid hormone-like hormone (PTHLH) secretion in cultured human cells. The biosensing system is based on the nanochannels blockage upon immunocomplex formation, which is electrically monitored through the voltammetric oxidation of Prussian blue nanoparticles (PBNPs). Models evaluated include a neuroblastoma cell line (SK-N-AS) and immortalized keratinocytes (HaCaT) as a control of high PTHLH production. The effect of total number of seeded cells and incubation time on the secreted PTHLH levels is assessed, finding that secreted PTHLH levels range from approximately 60 to 400 ng/mL. Moreover, our methodology is also applied to analyse PTHLH production following PTHLH gene knockdown upon transient cell transfection with a specific silencing RNA (siRNA). Given that inhibition of PTHLH secretion reduces cell proliferation, survival and invasiveness in a number of tumors, our system provides a powerful tool for the preclinical evaluation of therapies that regulate PTHLH production. This nanoporous membrane - based sensing technology might be useful to monitor the active secretion of other proteins as well, thus contributing to characterize their regulation and function. |
Ajuts: | European Commission 675228 Ministerio de Economía y Competitividad PCIN-2016-066 Ministerio de Economía y Competitividad MAT2014-52485-P Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad MSCBS/FIS PI17/01822 Ministerio de Economía y Competitividad MSCBS/FIS PI14/00040 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-260 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Nanopores/nanochannels ; PTHLH ; Neuroblastoma ; Cancer cells ; Electrochemical detection |
Publicat a: | Biosensors & bioelectronics, Vol. 107 (June 2018) , p. 62-68, ISSN 1873-4235 |
Postprint 23 p, 991.6 KB |