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| 1. |  | SILVA, P. M. P. da; CHIARI, L.; JANK, L.; ARAUJO, A. R. de; EUCLIDES, V. P. B. Avaliação de cultivares de Panicum maximum Jacq. submetidas ao déficit hídrico. In: WORKSHOP SOBRE TOLERÂNCIA A ESTRESSES ABIÓTICOS EM PLANTAS FORRAGEIRAS, 2013, Campo Grande, MS. Anais... Brasília, DF: Embrapa, 2013. 104 p. (Embrapa Gado de Corte. Documentos, 199). Comitê técnico: Cacilda Borges do Valle; Geovani Ferreira Alves; Letícia Jungmann Cançado; Liana Jank; Lucimara Chiari; Lucinete Colombo; Sanzio Carvalho Lima Barrios; Ulisses José de Figueiredo. p. 37-45| Biblioteca(s): Embrapa Gado de Corte. |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
15/10/2020 |
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Data da última atualização: |
12/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOARES, J. C.; MELENDEZ, M. E.; SOARES, A. C.; ARANTES, L. M. R. B.; RODRIGUES, V. C.; CARVALHO, A. L.; REIS, R. M.; MATTOSO, L. H. C.; OLIVEIRA JUNIOR, O. N. |
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Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Detection of HPV16 in cell lines deriving from cervical and head and neck cancer using a genosensor made with a DNA probe on a layer-by-layer matrix. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Materials Chemistry Frontiers, v. 4, n. 11, 2020. |
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Páginas: |
3258-3266 |
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DOI: |
10.1039/d0qm00530d |
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Idioma: |
Inglês |
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Conteúdo: |
Detection of human papillomavirus 16 (HPV16) is essential for the diagnosis of cervix and head and neck cancer, which has prompted the development of biosensors to replace the sophisticated molecular techniques. In this paper, we employ a genosensor made with a HPV16 DNA probe (cpHPV16) immobilized on a layer-by-layer (LbL) film of chitosan and carbon nanotubes to detect a complementary sequence HPV16 oligo (ssHPV16). In addition to employing impedance spectroscopy, which has already been used in the literature, we detect ssHPV16 in buffer samples and in cancer cell line samples with UV-vis. spectroscopy. The limit of detection was 18.5 pmol L−1 in impedance spectroscopy measurements and 10.9 pmol L−1 in UV-vis measurements. Distinction of the various ssHPV16 concentrations and of the cancer cell line samples CasKi, SiHa, UMSCC-47, UM-SCC104 and 93-VU147T with both electrical and optical data could be made with the multidimensional projection technique referred to as interactive document mapping (IDMAP), with which we could confirm the absence of false positives by testing cell lines that did not contain ssHPV16 (JHU12, JHU13 and JHU28). The hybridization between cpHPV16 and ssHPV16 responsible for the biosensing was verified with polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS), while the concentration dependence could be modeled with a double Freundlich function. The use of optical absorbance measurements to detect ssHPV16 is promising toward a simple colorimetric detection. MenosDetection of human papillomavirus 16 (HPV16) is essential for the diagnosis of cervix and head and neck cancer, which has prompted the development of biosensors to replace the sophisticated molecular techniques. In this paper, we employ a genosensor made with a HPV16 DNA probe (cpHPV16) immobilized on a layer-by-layer (LbL) film of chitosan and carbon nanotubes to detect a complementary sequence HPV16 oligo (ssHPV16). In addition to employing impedance spectroscopy, which has already been used in the literature, we detect ssHPV16 in buffer samples and in cancer cell line samples with UV-vis. spectroscopy. The limit of detection was 18.5 pmol L−1 in impedance spectroscopy measurements and 10.9 pmol L−1 in UV-vis measurements. Distinction of the various ssHPV16 concentrations and of the cancer cell line samples CasKi, SiHa, UMSCC-47, UM-SCC104 and 93-VU147T with both electrical and optical data could be made with the multidimensional projection technique referred to as interactive document mapping (IDMAP), with which we could confirm the absence of false positives by testing cell lines that did not contain ssHPV16 (JHU12, JHU13 and JHU28). The hybridization between cpHPV16 and ssHPV16 responsible for the biosensing was verified with polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS), while the concentration dependence could be modeled with a double Freundlich function. The use of optical absorbance measurements to detect ssHPV16 is promising toward a... Mostrar Tudo |
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Palavras-Chave: |
Chitosan and carbon nanotubes; Sophisticated molecular techniques. |
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Categoria do assunto: |
-- |
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Marc: |
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001 2125561
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008 2020 bl uuuu u00u1 u #d
024 7 $a10.1039/d0qm00530d$2DOI
100 1 $aSOARES, J. C.
245 $aDetection of HPV16 in cell lines deriving from cervical and head and neck cancer using a genosensor made with a DNA probe on a layer-by-layer matrix.$h[electronic resource]
260 $c2020
300 $a3258-3266
520 $aDetection of human papillomavirus 16 (HPV16) is essential for the diagnosis of cervix and head and neck cancer, which has prompted the development of biosensors to replace the sophisticated molecular techniques. In this paper, we employ a genosensor made with a HPV16 DNA probe (cpHPV16) immobilized on a layer-by-layer (LbL) film of chitosan and carbon nanotubes to detect a complementary sequence HPV16 oligo (ssHPV16). In addition to employing impedance spectroscopy, which has already been used in the literature, we detect ssHPV16 in buffer samples and in cancer cell line samples with UV-vis. spectroscopy. The limit of detection was 18.5 pmol L−1 in impedance spectroscopy measurements and 10.9 pmol L−1 in UV-vis measurements. Distinction of the various ssHPV16 concentrations and of the cancer cell line samples CasKi, SiHa, UMSCC-47, UM-SCC104 and 93-VU147T with both electrical and optical data could be made with the multidimensional projection technique referred to as interactive document mapping (IDMAP), with which we could confirm the absence of false positives by testing cell lines that did not contain ssHPV16 (JHU12, JHU13 and JHU28). The hybridization between cpHPV16 and ssHPV16 responsible for the biosensing was verified with polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS), while the concentration dependence could be modeled with a double Freundlich function. The use of optical absorbance measurements to detect ssHPV16 is promising toward a simple colorimetric detection.
653 $aChitosan and carbon nanotubes
653 $aSophisticated molecular techniques
700 1 $aMELENDEZ, M. E.
700 1 $aSOARES, A. C.
700 1 $aARANTES, L. M. R. B.
700 1 $aRODRIGUES, V. C.
700 1 $aCARVALHO, A. L.
700 1 $aREIS, R. M.
700 1 $aMATTOSO, L. H. C.
700 1 $aOLIVEIRA JUNIOR, O. N.
773 $tMaterials Chemistry Frontiers$gv. 4, n. 11, 2020.
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