1
|
Kmit A, Marson FAL, Pereira SVN, Vinagre AM, Leite GS, Servidoni MF, Ribeiro JD, Ribeiro AF, Bertuzzo CS, Amaral MD. Extent of rescue of F508del-CFTR function by VX-809 and VX-770 in human nasal epithelial cells correlates with SNP rs7512462 in SLC26A9 gene in F508del/F508del Cystic Fibrosis patients. Biochim Biophys Acta Mol Basis Dis 2019; 1865:1323-1331. [PMID: 30716472 DOI: 10.1016/j.bbadis.2019.01.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/16/2019] [Accepted: 01/30/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND We analyzed the CFTR response to VX-809/VX-770 drugs in conditionally reprogrammed cells (CRC) of human nasal epithelium (HNE) from F508del/F508del patients based on SNP rs7512462 in the Solute Carrier Family 26, Member 9 (SLC26A9; MIM: 608481) gene. METHODS The Isc-eq measurements of primary nasal epithelial cells from F508del/F508del patients (n = 12) for CFTR function were performed in micro Ussing chambers and compared with non-CF controls (n = 2). Data were analyzed according to the rs7512462 genotype which were determined by real-time PCR. RESULTS The CRC-HNE cells from F508del/F508del patients evidenced high variability in the basal levels of CFTR function. Also, the rs7512462*C allele showed an increased basal CFTR function and higher responses to VX-809 + VX-770. The rs7512462*CC + CT genotypes together evidenced CFTR function levels of 14.89% relatively to wt/wt (rs7512462*CT alone-15.29%) i.e., almost double of rs7512462*TT (7.13%). Furthermore, sweat [Cl-] and body mass index of patients also evidenced an association with the rs7512462 genotype. CONCLUSION The CFTR function can be performed in F508del/F508del patient-derived CRC-HNEs and its function and responses to VX-809 + VX-770 combination as well as clinical data, are all associated with the rs7512462 variant, which partially sheds light on the generally inter-individual phenotypic variability and in personalized responses to CFTR modulator drugs.
Collapse
Affiliation(s)
- Arthur Kmit
- Department of Medical Genetics and Genomic Medicine, Faculty of Medical Sciences, University of Campinas, Brazil; Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Brazil.
| | - Fernando Augusto Lima Marson
- Department of Medical Genetics and Genomic Medicine, Faculty of Medical Sciences, University of Campinas, Brazil; Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Brazil.
| | - Stéphanie Villa-Nova Pereira
- Department of Medical Genetics and Genomic Medicine, Faculty of Medical Sciences, University of Campinas, Brazil
| | | | - Gabriela Silva Leite
- Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Brazil
| | | | - José Dirceu Ribeiro
- Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Brazil
| | | | - Carmen Sílvia Bertuzzo
- Department of Medical Genetics and Genomic Medicine, Faculty of Medical Sciences, University of Campinas, Brazil.
| | - Margarida Duarte Amaral
- University of Lisboa, Faculty of Sciences, BioISI - Biosystems & Integrative Sciences Institute, Portugal.
| |
Collapse
|
2
|
Gomez CCS, Marson FAL, Servidoni MF, Ribeiro AF, Ribeiro MÂGO, Gama VAL, Costa ET, Ribeiro JD, Vieira Junior FU. Evaluation of continuous constant current and continuous pulsed current in sweat induction for cystic fibrosis diagnosis. BMC Pulm Med 2018; 18:153. [PMID: 30217179 PMCID: PMC6137935 DOI: 10.1186/s12890-018-0696-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 07/24/2018] [Indexed: 11/17/2022] Open
Abstract
Background The sweat test (ST) is the gold standard for the diagnosis of cystic fibrosis (CF). However, little is known about sweat induction using different types of currents and waves. In this context, our objective was to develop a device to induce sweat and compare the use of continuous constant current (CCC) and continuous pulsed current (CPC) in individuals with CF and healthy controls. Methods A prospective cross-sectional study with experimental intervention. The variables of gender, ethnicity, age, and body mass index (BMI) were considered. The method of Gibson and Cooke was used, and the following markers were evaluated: sweat weight, electrical impedance, sufficient sweat amount, and CF diagnosis. Triangular (TPC) or sinusoidal (SPC) pulsed current was applied to the right arm, and CCC was applied to the left arm. Results The study analyzed 260 individuals, 141/213 (54.2%) were female participants, 135/260 (51.9%) were Caucasians. The distribution of individuals by concentration of chloride at the ST was: (CF) 26/260 (10%); (borderlines) 109/260 (41.9%); (healthy) 97/260 (37.3%); (insufficient weight in sweat) 28/260 (10.8%). No association was observed between the sufficient sweat amount to perform the ST when we compared the currents. However, the SPC showed a higher amount of sweat weight. Using Bland and Altman plot considering the agreement between the sweat chloride values achieved from CPC [SPC and TPC] and CCC, there was no proportional bias and mean values are unrelated and only explain less than 8% of the variation. Moreover, TPC presented higher electrical impedance when compared with SPC and CCC. SPC presented lower electrical impedance and higher sweat weight than CCC. Male participants presented lower electrical impedance and higher sweat weight with CCC and TPC, and higher sweat weight with SPC. Conclusions The evaluated currents are safe and able to induce and produce sweat in sufficient quantities for the ST. SPC presented lower electrical impedance when compared with other currents. The use of SPC is recommended to induce sweat in patients with sweat problems. Finally, ethnicity, gender, age and BMI did not influence sweat induction at the ST, and no side effect was observed in our study. Electronic supplementary material The online version of this article (10.1186/s12890-018-0696-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Carla Cristina Souza Gomez
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil. .,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.
| | - Fernando Augusto Lima Marson
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil. .,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil. .,Department of Medical Genetics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.
| | - Maria Fátima Servidoni
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.,Gastrocentro - Endoscopy Unit, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-872, Brazil
| | - Antônio Fernando Ribeiro
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil
| | - Maria Ângela Gonçalves Oliveira Ribeiro
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil
| | - Veruska Acioli Lopes Gama
- Center for Biomedical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-970, Brazil.,Department of Biomedical Engineering, Faculty of Electrical and Computer Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-881, Brazil.,Federal Institute of Education, Science and Technology of Sao Paulo, Campus Campinas, km 143.5, Campinas, São Paulo, 13069-901, Brazil
| | - Eduardo Tavares Costa
- Center for Biomedical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-970, Brazil.,Department of Biomedical Engineering, Faculty of Electrical and Computer Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-881, Brazil
| | - José Dirceu Ribeiro
- Department of Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil.,Center for Research in Pediatrics, School of Medical Sciences, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-887, Brazil
| | - Francisco Ubaldo Vieira Junior
- Center for Biomedical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-970, Brazil.,Department of Biomedical Engineering, Faculty of Electrical and Computer Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, São Paulo, 13083-881, Brazil.,Federal Institute of Education, Science and Technology of Sao Paulo, Campus Campinas, km 143.5, Campinas, São Paulo, 13069-901, Brazil
| |
Collapse
|
3
|
Servidoni MF, Gomez CCS, Marson FAL, Toro AADC, Ribeiro MÂGDO, Ribeiro JD, Ribeiro AF. Sweat test and cystic fibrosis: overview of test performance at public and private centers in the state of São Paulo, Brazil. J Bras Pneumol 2017; 43:121-128. [PMID: 28538779 PMCID: PMC5474375 DOI: 10.1590/s1806-37562016000000076] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 01/06/2017] [Indexed: 12/15/2022] Open
Abstract
Objective: The sweat test (ST) measures chloride levels in sweat and is considered the gold standard for the diagnosis of cystic fibrosis (CF). However, the reliability of a ST depends on their being performed by experienced technicians and in accordance with strict guidelines. Our aim was to evaluate how sweat stimulation, sweat collection, and chloride measurement are performed at 14 centers (9 public centers and 5 private centers) that routinely perform STs in the state of São Paulo, which has the highest frequency of CF in Brazil. Methods: This was a cross-sectional cohort study, using a standardized questionnaire administered in loco to the staff responsible for conducting STs. Results: No uniformity regarding the procedures was found among the centers. Most centers were noncompliant with the international guidelines, especially regarding the collection of sweat (the samples were insufficient in 10-50% of the subjects tested); availability of stimulation equipment (which was limited at 2 centers); modernity and certification of stimulation equipment (most of the equipment having been used for 3-23 years); and written protocols (which were lacking at 12 centers). Knowledge of ST guidelines was evaluated at only 1 center. Conclusions: Our results show that STs largely deviate from internationally accepted guidelines at the participating centers. Therefore, there is an urgent need for standardization of STs, training of qualified personnel, and acquisition/certification of suitable equipment. These are essential conditions for a reliable diagnosis of CF, especially with the increasing demand due to newborn screening nationwide, and for the assessment of a possible clinical benefit from the use of modulator drugs.
Collapse
Affiliation(s)
- Maria Fátima Servidoni
- . Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil.,. Gastrocentro - Unidade de Endoscopia, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil
| | - Carla Cristina Souza Gomez
- . Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil
| | - Fernando Augusto Lima Marson
- . Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil.,. Departamento de Genética Médica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil
| | | | | | - José Dirceu Ribeiro
- . Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil
| | - Antônio Fernando Ribeiro
- . Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas - Unicamp - Campinas (SP) Brasil
| | | |
Collapse
|