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  1. AU="Camacho-Aguayo, Javier"
  2. AU="Zhou, Cong"
  3. AU="Hubner, P"
  4. AU="Suppanz, Ida"
  5. AU="Maria do Rosário Gondim Peixoto"
  6. AU="Lehto, Timo-Pekka K"
  7. AU="Bhattacharya, Joyeeta"
  8. AU="Gabriela Lopez‐Gonzalez"
  9. AU="South, Andrew M."
  10. AU="Skei, Sigmund"
  11. AU="Gillet, Jean‐François"
  12. AU="McKee, Mary"
  13. AU="Hajar Vaseghi"
  14. AU="M.Haney, "
  15. AU="R. Kappenberger"
  16. AU="Sempoux, Christine" AU="Sempoux, Christine"
  17. AU=Choi Wonseon
  18. AU=Gudowska-Sawczuk Monika AU=Gudowska-Sawczuk Monika
  19. AU="Roufosse, Florence"
  20. AU=Rugolotto Silvana
  21. AU="Herron, Benjamin"
  22. AU="Fernández Menéndez, Jorge"
  23. AU="Nguyen, Hang Tt"
  24. AU="Tahiri, M"
  25. AU=Zhang Ying-Ying
  26. AU="Warkaye, Samson"
  27. AU="Bavor, Claire"

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  1. Artikel ; Online: Enzymatically mediated fluorescent copper nanocluster generation for tyramine determination.

    Camacho-Aguayo, Javier / de Marcos, Susana / Pericás, Marta / Galbán, Javier

    Analytical and bioanalytical chemistry

    2023  Band 415, Heft 11, Seite(n) 2037–2044

    Abstract: This work details the enzymatic generation of fluorescence nanomaterials and the use of this optical signal as the analytical parameter for the quantification of the substrate. More specifically, fluorescent copper nanoclusters have been obtained during ... ...

    Abstract This work details the enzymatic generation of fluorescence nanomaterials and the use of this optical signal as the analytical parameter for the quantification of the substrate. More specifically, fluorescent copper nanoclusters have been obtained during the enzymatic reaction of tyramine oxidase and tyramine in the presence of Cu(II); the fluorescence intensity being proportional to the concentration of tyramine. The nanoclusters obtained show fluorescence at 445 nm by being excited at 320 nm and have been characterized by TEM, EDX, and XPS. The formation mechanism has also been studied, suggesting that under the optimal conditions (0.1 M MES buffer and pH = 6), the formation of the nanoclusters is due to the reducing properties of the product of the enzymatic reaction (p-hydroxybenzaldehyde) in MES buffer. The method shows a linear relationship with the concentration of tyramine in the range from 1.0·10
    Mesh-Begriff(e) Metal Nanoparticles ; Copper/chemistry ; Fluorescent Dyes ; Spectrometry, Fluorescence/methods ; Tyramine/chemistry
    Chemische Substanzen Copper (789U1901C5) ; Fluorescent Dyes ; Tyramine (X8ZC7V0OX3)
    Sprache Englisch
    Erscheinungsdatum 2023-02-10
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 201093-8
    ISSN 1618-2650 ; 0016-1152 ; 0372-7920
    ISSN (online) 1618-2650
    ISSN 0016-1152 ; 0372-7920
    DOI 10.1007/s00216-023-04571-4
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: In situ enzymatic generation of Au/Pt nanoparticles as an analytical photometric system: proof of concept determination of tyramine.

    Camacho-Aguayo, Javier / de Marcos, Susana / Felices, Carlos / Galbán, Javier

    Mikrochimica acta

    2023  Band 190, Heft 4, Seite(n) 114

    Abstract: In situ enzymatic generation of bimetallic nanoparticles, mainly Au/Pt, overcomes the drawbacks (continuous absorbance drift, modest LOQ, and long-time reaction) observed when AuNP alone are produced. In this study, Au/Pt nanoparticles have been ... ...

    Abstract In situ enzymatic generation of bimetallic nanoparticles, mainly Au/Pt, overcomes the drawbacks (continuous absorbance drift, modest LOQ, and long-time reaction) observed when AuNP alone are produced. In this study, Au/Pt nanoparticles have been characterized by EDS, XPS, and HRTEM images using the enzymatic determination of tyramine with tyramine oxidase (TAO) as a model. Under experimental conditions, the Au/Pt NPs show an absorption maximum at 580 nm which can be related to the concentration of tyramine in the range 1.0 × 10
    Sprache Englisch
    Erscheinungsdatum 2023-03-06
    Erscheinungsland Austria
    Dokumenttyp Journal Article
    ZDB-ID 89-9
    ISSN 1436-5073 ; 0026-3672
    ISSN (online) 1436-5073
    ISSN 0026-3672
    DOI 10.1007/s00604-023-05698-y
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Selective generation of gold nanostructures mediated by flavo-enzymes to develop optical biosensors

    Camacho-Aguayo, Javier / de Marcos, Susana / Mora, Verónica / Galbán, Javier

    Biosensors & bioelectronics. 2022 July 14,

    2022  

    Abstract: This paper explores, for the first time, the use of flavo-enzymes for the enzymatic generation of gold nanomaterials. It has been demonstrated that when the oxidation of glucose by GOx is carried out in the presence of Au(III), the in-situ formation of ... ...

    Abstract This paper explores, for the first time, the use of flavo-enzymes for the enzymatic generation of gold nanomaterials. It has been demonstrated that when the oxidation of glucose by GOx is carried out in the presence of Au(III), the in-situ formation of gold nanomaterials is observed. Moreover, depending on the experimental conditions, either nanoparticles (AuNPs) or nanoclusters (AuNCs) are better observed, whose spectroscopical properties can be related to the concentration of glucose. Working at pH 6, only AuNCs with fluorescence at 420 nm (λₑₓ = 335 nm) are obtained (linear relationship from 6.0·10⁻⁵ M to 1.5·10⁻³ M glucose). However, when the enzymatic reaction is performed at pH = 8, AuNPs (λₘₐₓ = 580 nm) are also obtained (linear relationship from 5.5·10⁻⁴ M to 2.0·10⁻³ M glucose). Mathematical equations describing the variation of fluorescence and absorbance values during the reaction have been proposed. The results obtained suggest that AuNCs are formed using GOx as nucleation seeds. Since AuNPs belong to the branched-type, it is suggested that they are obtained by AuNC coalescence. From these models the AuNP molar absorptivity per atom was obtained (2.0(±0.3)·10³ M⁻¹cm⁻¹). Finally, the method has been applied to the determination of glucose in orange juice and human plasma samples. Comparing the results with the GOx/HRP/TMB method and a commercial glucometer, no significant differences (P = 0.05) are obtained.
    Schlagwörter absorbance ; absorptivity ; biosensors ; enzymatic reactions ; fluorescence ; glucose ; gold ; humans ; orange juice ; oxidation ; pH
    Sprache Englisch
    Erscheinungsverlauf 2022-0714
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    Anmerkung Pre-press version
    ZDB-ID 1011023-9
    ISSN 1873-4235 ; 0956-5663
    ISSN (online) 1873-4235
    ISSN 0956-5663
    DOI 10.1016/j.bios.2022.114579
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel ; Online: Selective generation of gold nanostructures mediated by flavo-enzymes to develop optical biosensors.

    Camacho-Aguayo, Javier / de Marcos, Susana / Mora-Sanz, Verónica / Galbán, Javier

    Biosensors & bioelectronics

    2022  Band 215, Seite(n) 114579

    Abstract: This paper explores, for the first time, the use of flavo-enzymes for the enzymatic generation of gold nanomaterials. It has been demonstrated that when the oxidation of glucose by GOx is carried out in the presence of Au(III), the in-situ formation of ... ...

    Abstract This paper explores, for the first time, the use of flavo-enzymes for the enzymatic generation of gold nanomaterials. It has been demonstrated that when the oxidation of glucose by GOx is carried out in the presence of Au(III), the in-situ formation of gold nanomaterials is observed. Moreover, depending on the experimental conditions, either nanoparticles (AuNPs) or nanoclusters (AuNCs) are better observed, whose spectroscopical properties can be related to the concentration of glucose. Working at pH 6, only AuNCs with fluorescence at 420 nm (λ
    Mesh-Begriff(e) Biosensing Techniques ; Glucose ; Gold/chemistry ; Humans ; Metal Nanoparticles/chemistry ; Nanostructures
    Chemische Substanzen Gold (7440-57-5) ; Glucose (IY9XDZ35W2)
    Sprache Englisch
    Erscheinungsdatum 2022-07-19
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 1011023-9
    ISSN 1873-4235 ; 0956-5663
    ISSN (online) 1873-4235
    ISSN 0956-5663
    DOI 10.1016/j.bios.2022.114579
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Towards new fluorometric methodologies based on the in-situ generation of gold nanoclusters.

    Navarro, Jesús / Cepriá, Gemma / Camacho-Aguayo, Javier / Martín, Santiago / González Orive, Alejandro / de Marcos, Susana / Galbán, Javier

    Talanta

    2023  Band 266, Heft Pt 2, Seite(n) 125119

    Abstract: In this manuscript a method for the fluorometric determination of tyramine is described. It is based on the direct reaction between Au(III) and tyramine in a phosphate buffer which produces fluorescent gold nanoclusters (AuNC) ( ... ...

    Abstract In this manuscript a method for the fluorometric determination of tyramine is described. It is based on the direct reaction between Au(III) and tyramine in a phosphate buffer which produces fluorescent gold nanoclusters (AuNC) (λ
    Mesh-Begriff(e) Cadaverine ; Coloring Agents ; Fluorometry ; Gold ; Tyramine
    Chemische Substanzen Cadaverine (L90BEN6OLL) ; Coloring Agents ; Gold (7440-57-5) ; Tyramine (X8ZC7V0OX3)
    Sprache Englisch
    Erscheinungsdatum 2023-08-24
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2023.125119
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Ir(III) Half-Sandwich Photosensitizers with a π-Expansive Ligand for Efficient Anticancer Photodynamic Therapy.

    Gonzalo-Navarro, Carlos / Zafon, Elisenda / Organero, Juan Angel / Jalón, Félix A / Lima, Joao Carlos / Espino, Gustavo / Rodríguez, Ana María / Santos, Lucía / Moro, Artur J / Barrabés, Sílvia / Castro, Jessica / Camacho-Aguayo, Javier / Massaguer, Anna / Manzano, Blanca R / Durá, Gema

    Journal of medicinal chemistry

    2024  Band 67, Heft 3, Seite(n) 1783–1811

    Abstract: One approach to reduce the side effects of chemotherapy in cancer treatment is photodynamic therapy (PDT), which allows spatiotemporal control of the cytotoxicity. We have used the strategy of coordinating π-expansive ligands to increase the excited ... ...

    Abstract One approach to reduce the side effects of chemotherapy in cancer treatment is photodynamic therapy (PDT), which allows spatiotemporal control of the cytotoxicity. We have used the strategy of coordinating π-expansive ligands to increase the excited state lifetimes of Ir(III) half-sandwich complexes in order to facilitate the generation of
    Mesh-Begriff(e) Photosensitizing Agents/pharmacology ; Photosensitizing Agents/therapeutic use ; Antineoplastic Agents/pharmacology ; Ligands ; Photochemotherapy ; Cell Line, Tumor ; Iridium/pharmacology
    Chemische Substanzen Photosensitizing Agents ; Antineoplastic Agents ; Ligands ; Iridium (44448S9773)
    Sprache Englisch
    Erscheinungsdatum 2024-01-30
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 218133-2
    ISSN 1520-4804 ; 0022-2623
    ISSN (online) 1520-4804
    ISSN 0022-2623
    DOI 10.1021/acs.jmedchem.3c01276
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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