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Bhat-Ambure J, Ambure P, Serrano-Candelas E, Galiana-Roselló C, Gil-Martínez A, Guerrero M, Martin M, González-García J, García-España E, Gozalbes R. G4-QuadScreen: A Computational Tool for Identifying Multi-Target-Directed Anticancer Leads against G-Quadruplex DNA. Cancers (Basel) 2023; 15:3817. [PMID: 37568632 PMCID: PMC10416877 DOI: 10.3390/cancers15153817] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/16/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023] Open
Abstract
The study presents 'G4-QuadScreen', a user-friendly computational tool for identifying MTDLs against G4s. Also, it offers a few hit MTDLs based on in silico and in vitro approaches. Multi-tasking QSAR models were developed using linear discriminant analysis and random forest machine learning techniques for predicting the responses of interest (G4 interaction, G4 stabilization, G4 selectivity, and cytotoxicity) considering the variations in the experimental conditions (e.g., G4 sequences, endpoints, cell lines, buffers, and assays). A virtual screening with G4-QuadScreen and molecular docking using YASARA (AutoDock-Vina) was performed. G4 activities were confirmed via FRET melting, FID, and cell viability assays. Validation metrics demonstrated the high discriminatory power and robustness of the models (the accuracy of all models is ~>90% for the training sets and ~>80% for the external sets). The experimental evaluations showed that ten screened MTDLs have the capacity to selectively stabilize multiple G4s. Three screened MTDLs induced a strong inhibitory effect on various human cancer cell lines. This pioneering computational study serves a tool to accelerate the search for new leads against G4s, reducing false positive outcomes in the early stages of drug discovery. The G4-QuadScreen tool is accessible on the ChemoPredictionSuite website.
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Affiliation(s)
| | - Pravin Ambure
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras (CEEI), Parque Tecnológico de Valencia, 46980 Valencia, Spain; (P.A.); (E.S.-C.)
| | - Eva Serrano-Candelas
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras (CEEI), Parque Tecnológico de Valencia, 46980 Valencia, Spain; (P.A.); (E.S.-C.)
| | - Cristina Galiana-Roselló
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, 46980 Valencia, Spain; (C.G.-R.); (A.G.-M.); (J.G.-G.); (E.G.-E.)
| | - Ariadna Gil-Martínez
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, 46980 Valencia, Spain; (C.G.-R.); (A.G.-M.); (J.G.-G.); (E.G.-E.)
| | - Mario Guerrero
- Biochemistry and Molecular Biology Unit, Biomedicine Department, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain; (M.G.); (M.M.)
| | - Margarita Martin
- Biochemistry and Molecular Biology Unit, Biomedicine Department, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain; (M.G.); (M.M.)
- Clinical and Experimental Respiratory Immunoallergy (IRCE), Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Jorge González-García
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, 46980 Valencia, Spain; (C.G.-R.); (A.G.-M.); (J.G.-G.); (E.G.-E.)
| | - Enrique García-España
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, 46980 Valencia, Spain; (C.G.-R.); (A.G.-M.); (J.G.-G.); (E.G.-E.)
| | - Rafael Gozalbes
- MolDrug AI Systems SL, c/Olimpia Arozena Torres, 46018 Valencia, Spain;
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras (CEEI), Parque Tecnológico de Valencia, 46980 Valencia, Spain; (P.A.); (E.S.-C.)
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Gil-Martínez A, Hernández A, Galiana-Roselló C, López-Molina S, Ortiz J, Sastre-Santos Á, García-España E, González-García J. Development and application of metallo-phthalocyanines as potent G-quadruplex DNA binders and photosensitizers. J Biol Inorg Chem 2023:10.1007/s00775-023-02003-3. [PMID: 37452218 PMCID: PMC10368564 DOI: 10.1007/s00775-023-02003-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 04/27/2023] [Indexed: 07/18/2023]
Abstract
Metallo-phthalocyanines (MPc) are common photosensitizers with ideal photophysical and photochemical properties. Also, these molecules have shown to interact with non-canonical nucleic acid structures, such as G-quadruplexes, and modulate oncogenic expression in cancer cells. Herein, we report the synthesis and characterisation of two metallo-phthalocyanines containing either zinc (ZnPc) or nickel (NiPc) in the central aromatic core and four alkyl ammonium lateral chains. The interaction of both molecules with G-quadruplex DNA was assessed by UV-Vis, fluorescence and FRET melting experiments. Both molecules bind strongly to G-quadruplexes and stabilise these structures, being NiPc the most notable G-quadruplex stabiliser. In addition, the photosensitizing ability of both metal complexes was explored by the evaluation of the singlet oxygen generation and their photoactivation in cells. Only ZnPc showed a high singlet oxygen generation either by direct observation or by indirect evaluation using a DPBF dye. The cellular evaluation showed mainly cytoplasmic localization of ZnPc and a decrease of the IC50 values of the cell viability of ZnPc upon light activation of two orders of magnitude. Two metallo-phthalocyanines containing zinc and nickel within the aromatic core have been investigated as G-quadruplex stabilizers and photosensitizers. NiPc shows a high G4 binding but negligible photosensitizing ability while ZnPc exhibits a moderate binding to G-quadruplex together with a high potency to generate singlet oxygen and photocytotoxicity. The interaction with G4s and capacity to be photosensitized is associated with the geometry adopted by the central metal core of the phthalocyanine scaffold.
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Affiliation(s)
- Ariadna Gil-Martínez
- Institute of Molecular Science (ICMol) and Department of Inorganic Chemistry, University of Valencia, C./Jose Beltran 2, 46980, Paterna, Spain
| | - Adrián Hernández
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03202, Elche, Spain
| | - Cristina Galiana-Roselló
- Institute of Molecular Science (ICMol) and Department of Inorganic Chemistry, University of Valencia, C./Jose Beltran 2, 46980, Paterna, Spain
| | - Sònia López-Molina
- Institute of Molecular Science (ICMol) and Department of Inorganic Chemistry, University of Valencia, C./Jose Beltran 2, 46980, Paterna, Spain
| | - Javier Ortiz
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03202, Elche, Spain
| | - Ángela Sastre-Santos
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03202, Elche, Spain
| | - Enrique García-España
- Institute of Molecular Science (ICMol) and Department of Inorganic Chemistry, University of Valencia, C./Jose Beltran 2, 46980, Paterna, Spain
| | - Jorge González-García
- Institute of Molecular Science (ICMol) and Department of Inorganic Chemistry, University of Valencia, C./Jose Beltran 2, 46980, Paterna, Spain.
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Gil-Martínez A, López-Molina S, Galiana-Roselló C, Lázaro-Gómez A, Schlüter F, Rizzo F, González-García J. Modulating the G-Quadruplex and Duplex DNA Binding by Controlling the Charge of Fluorescent Molecules. Chemistry 2023; 29:e202203094. [PMID: 36318180 PMCID: PMC10107164 DOI: 10.1002/chem.202203094] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/29/2022] [Accepted: 10/31/2022] [Indexed: 12/13/2022]
Abstract
Two fluorescent and non-toxic spirobifluorene molecules bearing either positive (Spiro-NMe3) or negative (Spiro-SO3) charged moieties attached to the same aromatic structure have been investigated as binders for DNA. The novel Spiro-NMe3 containing four alkylammonium substituents interacts with G-quadruplex (G4) DNA structures and shows preference for G4s over duplex by means of FRET melting and fluorescence experiments. The interaction is governed by the charged substituents of the ligands as deduced from the lower binding of the sulfonate analogue (Spiro-SO3). On the contrary, Spiro-SO3 exhibits higher binding affinity to duplex DNA structure than to G4. Both molecules show a moderate quenching of the fluorescence upon DNA binding. The confocal microscopy evaluation shows the internalization of both molecules in HeLa cells and their lysosomal accumulation.
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Affiliation(s)
- Ariadna Gil-Martínez
- Institute of Molecular Science (ICMol) Department of Inorganic Chemistry, University of Valencia Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Sònia López-Molina
- Institute of Molecular Science (ICMol) Department of Inorganic Chemistry, University of Valencia Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Cristina Galiana-Roselló
- Institute of Molecular Science (ICMol) Department of Inorganic Chemistry, University of Valencia Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Andrea Lázaro-Gómez
- Institute of Molecular Science (ICMol) Department of Inorganic Chemistry, University of Valencia Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Friederike Schlüter
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Str. 10, 48149, Münster, Germany
| | - Fabio Rizzo
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Str. 10, 48149, Münster, Germany.,Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche (CNR), via G. Fantoli 16/15, 20138, Milano, Italy
| | - Jorge González-García
- Institute of Molecular Science (ICMol) Department of Inorganic Chemistry, University of Valencia Catedrático José Beltrán 2, 46980, Paterna, Spain
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López-Molina S, Galiana-Roselló C, Galiana C, Gil-Martínez A, Bandeira S, González-García J. Alkaloids as Photosensitisers for the Inactivation of Bacteria. Antibiotics (Basel) 2021; 10:1505. [PMID: 34943717 PMCID: PMC8698950 DOI: 10.3390/antibiotics10121505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/29/2021] [Accepted: 12/02/2021] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial photodynamic therapy has emerged as a powerful approach to tackle microbial infections. Photodynamic therapy utilises a photosensitiser, light, and oxygen to generate singlet oxygen and/or reactive oxygen species in an irradiated tissue spot, which subsequently react with nearby biomolecules and destroy the cellular environment. Due to the possibility to irradiate in a very precise location, it can be used to eradicate bacteria, fungus, and parasites upon light activation of the photosensitiser. In this regard, natural products are low-cost molecules capable of being obtained in large quantities, and some of them can be used as photosensitisers. Alkaloids are the largest family among natural products and include molecules with a basic nature and aromatic rings. For this study, we collected the naturally occurring alkaloids used to treat microorganism infections using a photodynamic inactivation approach. We gathered their main photophysical properties (excitation/emission wavelengths, quantum yields, and oxygen quantum yield) which characterise the ability to efficiently photosensitise. In addition, we described the antibacterial activity of alkaloids upon irradiation and the mechanisms involved in the microorganism killing. This review will serve as a reference source to obtain the main information on alkaloids used in antimicrobial photodynamic therapy.
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Affiliation(s)
- Sònia López-Molina
- Department of Inorganic Chemistry, Institute of Molecular Science, Catedrático José Beltran 2, 46980 Paterna, Spain; (S.L.-M.); (C.G.-R.); (A.G.-M.); (S.B.)
| | - Cristina Galiana-Roselló
- Department of Inorganic Chemistry, Institute of Molecular Science, Catedrático José Beltran 2, 46980 Paterna, Spain; (S.L.-M.); (C.G.-R.); (A.G.-M.); (S.B.)
| | - Carolina Galiana
- Department of Pharmacy, CEU Cardenal Herrera University, Ramón y Cajal s/n, 46115 Alfara del Patriarca, Spain;
| | - Ariadna Gil-Martínez
- Department of Inorganic Chemistry, Institute of Molecular Science, Catedrático José Beltran 2, 46980 Paterna, Spain; (S.L.-M.); (C.G.-R.); (A.G.-M.); (S.B.)
| | - Stephane Bandeira
- Department of Inorganic Chemistry, Institute of Molecular Science, Catedrático José Beltran 2, 46980 Paterna, Spain; (S.L.-M.); (C.G.-R.); (A.G.-M.); (S.B.)
| | - Jorge González-García
- Department of Inorganic Chemistry, Institute of Molecular Science, Catedrático José Beltran 2, 46980 Paterna, Spain; (S.L.-M.); (C.G.-R.); (A.G.-M.); (S.B.)
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Serrano-García B, Bartrina-Rodríguez I, Zubeldia-Varela JM, Cebrián-Carretero JL, Del-Castillo-Pardo-de-Vera JL, Pardo-Montero J, Gil-Martínez A. Preliminary study of the Craniofacial Pain and Disability Inventory-11: validation for patients with head and neck cancer. Med Oral Patol Oral Cir Bucal 2021; 26:e661-e668. [PMID: 34023845 PMCID: PMC8412443 DOI: 10.4317/medoral.24673] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 02/18/2021] [Accepted: 05/03/2021] [Indexed: 11/23/2022] Open
Abstract
Background Cancer involves numerous physical, psychological and emotional changes and has a negative impact on patients. Although there are a wide variety of questionnaires for general use in patients with cancer, very few are available that assess the pain, disability and craniomandibular functionality of patients with head and neck cancer (HNC) in a more specific manner. The purpose of this study is to present the preliminary behavior of the CF-PDI in its reduced version adapted for patients with HNC. Material and Methods A total of 61 patients with HNC were included in a study to preliminarily analyze the internal consistency of the instrument, the convergent validity and the floor and ceiling effects. All the patients completed the informed consent document and a battery of 5 questionnaires: The Numerical Rating Scale (NRS), the Tampa Scale for Kinesiophobia for Temporomandibular Disorders (TSK-TMD), the Pain Catastrophizing Scale (PCS), the Quality of Life Questionnaire in patients with HNC (QLQ-HN) and the reduced version of the Craniofacial Pain and Disability Inventory (CF-PDI-11). Patients also performed 2 physical tests: measurements of the pain threshold on the masseter muscle and on the distal phalanx of the first finger; and the maximum mouth opening in neutral head position. Results Cronbach's α coefficient showed a very high internal consistency of 0.92. In terms of convergent validity, a statistically significant correlation was found between the CF-PDI-11 and the following variables: NRS, TSK-TMD, PCS, QLQ-HN, the threshold of pain in the distal phalanx of the first finger and the maximum interincisal opening. However, 21.3% of patients obtained the lowest possible score. The strongest correlation was found between the CF-PDI-11 and the QLQ-HN (r = 0.85, p <0.01). Conclusions The preliminary version of the CF-PDI-11 shows that it could be a valid and reliable instrument to measure pain, disability and quality of life in patients with HNC. Key words:Questionnaire, psychometric validation, head and neck cancer, pain, disability.
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Affiliation(s)
- B Serrano-García
- Physiotherapy Department Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid Calle La Salle 10, 28023 Madrid, Spain
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López-López A, Matías-Pompa B, Fernández-Carnero J, Gil-Martínez A, Alonso-Fernández M, Alonso Pérez JL, González Gutierrez JL. Blunted Pain Modulation Response to Induced Stress in Women with Fibromyalgia with and without Posttraumatic Stress Disorder Comorbidity: New Evidence of Hypo-Reactivity to Stress in Fibromyalgia? Behav Med 2021; 47:311-323. [PMID: 32356678 DOI: 10.1080/08964289.2020.1758611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
There is evidence regarding the presence of alterations in both the stress response and the endogenous pain modulation systems of people with fibromyalgia (FM). However, research on pain modulation under induced stress on FM patients is scarce and contradictory. The present study analyzes stress-induced changes in pain and intolerance thresholds among FM patients, examining the possible existence of differences linked to PTSD comorbidity and gaining insights into the role of cardiovascular reactivity. Eighteen women diagnosed with FM and comorbid PTSD (FM + PTSD), 18 women diagnosed with FM and no PTSD (FM-PTSD), and 38 healthy women (HC) were exposed to the Social Stress Test task. Pressure pain thresholds and intolerance thresholds were measured before and during stress induction, and after a recovery period, while systolic blood pressure and heart rate were simultaneously recorded. Overall, while pain thresholds decreased during stress and recovery for HC, no significant changes were observed for women with FM. The intolerance threshold decreased for HC during stress, but was maintained at basal level during recovery. FM-PTSD women exhibited a delayed response, with a drop at recovery. For FM + PTSD, tolerance levels remained unchanged. In addition, cardiovascular reactivity did not seem to explain these results. This performance of the pain modulation system seems to follow the same pattern of hypoactive responsiveness under stressors that has previously been observed in FM patients on the autonomic and neuroendocrine axes. Such a hypoactive pattern may involve a non-adaptive response that may contribute to the development and maintenance of chronic pain.
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Affiliation(s)
- A López-López
- Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health, Medical Microbiology and Immunology, King Juan Carlos University, Madrid, Spain
| | - B Matías-Pompa
- Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health, Medical Microbiology and Immunology, King Juan Carlos University, Madrid, Spain
| | - J Fernández-Carnero
- Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, King Juan Carlos University, Madrid, Spain
| | - A Gil-Martínez
- Department of Physical Therapy, Center of Higher Education Studies La Salle, Autonomous University of Madrid, Madrid, Spain
| | - M Alonso-Fernández
- Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health, Medical Microbiology and Immunology, King Juan Carlos University, Madrid, Spain
| | - J L Alonso Pérez
- Department of Physical Therapy, European University of Madrid, Madrid, Spain
| | - J L González Gutierrez
- Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health, Medical Microbiology and Immunology, King Juan Carlos University, Madrid, Spain
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Diaz-Saez MC, Gil-Martínez A, Iglesias González I, Kim Lee J, Del-Castillo Pardo de-Vera JL, Cebrián Carretero JL, Beltran-Alacreu H. A novel mobile application to determine mandibular and tongue laterality discrimination in women with chronic temporomandibular disorder. Med Oral Patol Oral Cir Bucal 2020; 25:e775-e783. [PMID: 32701931 PMCID: PMC7648923 DOI: 10.4317/medoral.23785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 03/02/2020] [Accepted: 05/19/2020] [Indexed: 11/17/2022] Open
Abstract
Background Chronic pain from temporomandibular disorders (TMDs) is caused by a somatosensory disturbance due to sustained activation of central nervous system nociceptive pathways, which can induce changes in neuroplasticity in the thalamus, basal ganglia and limbic system, as well as disturbances in the somatosensory, prefrontal and orbitofrontal cortex and cognitive impairment. The main objective of this study was to determine the discrimination capacity of mandibular and tongue laterality between women with chronic TMDs and asymptomatic women.
Material and Methods This descriptive-comparative study examined 2 groups with a total of 30 women. All participants were between the ages of 23 and 66 years and were assigned to the chronic TMD group or the asymptomatic group according to the inclusion criteria.
We employed a mobile application developed specifically for this study to measure the accuracy and reaction time (RT) of mandibular and tongue laterality discrimination.
Results The chronic TMD group had a lower success rate in laterality discrimination (mean mandibular accuracy of 40% and mean tongue accuracy of 67%) than the asymptomatic group (mean mandibular accuracy of 61% and mean tongue accuracy of 90%). These results showed statistically significant differences between the groups for mandibular laterality discrimination (d, 1.14; p<0.01) and tongue laterality discrimination (d, 0.79; p=0.03). The asymptomatic group had faster RTs than the chronic TMD group. The data revealed statistically significant differences for the right mandibular RT (d, 0.89; p=0.02) and right tongue RT (d, 0.83; p=0.03). However, there were no significant differences for left mandibular and left tongue RT.
Conclusions We found that the women with chronic TMDs had a lower success rate and slower RTs in the discrimination of mandibular laterality when compared with the asymptomatic women. Key words:Mobile application, tongue, chronic temporomandibular disorder, pain, lateral discrimination, cortical representation, reaction time.
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Affiliation(s)
- M-C Diaz-Saez
- Physiotherapy Department Centro Superior de Estudios Universitarios La Salle Universidad Autónoma de Madrid Calle La Salle 10, 28023 Madrid, Spain
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Lopera A, Gil-Martínez A, Pitarch-Jarque J, Verdejo B, Blasco S, Clares MP, Jiménez HR, García-España E. Influence of the chain length and metal : ligand ratio on the self-organization processes of Cu 2+ complexes of [1 + 1] 1H-pyrazole azamacrocycles. Dalton Trans 2020; 49:8614-8624. [PMID: 32543616 DOI: 10.1039/d0dt01056a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three new [1 + 1] macrocycles formed by the reaction of 1H-3,5-bis(chloromethyl)pyrazole with the tosylated amines 1,4,7,10-tetraazadecane (L1), 1,4,8,11-tetraazaundecane (L2) and 1,5,10,14-tetraazatetradecane (L3) are described. Potentiometric studies and HR-ESI-Mass spectrometry show the formation of dimeric binuclear Cu2+ complexes whose organization depends on the type of hydrocarbon chains connecting the amine groups. Furthermore, trinuclear or/and tetranuclear complexes are formed depending also on the length of the polyaminic bridge and on the sequence of the hydrocarbon chains. The crystal structures of the [2 + 2] [Cu2(H(H-1L2))2](ClO4)4·4H2O (1) and [Cu2(H-1L2)2](ClO4)2 (2) complexes show in both of them two macrocycles self-assembled by the metal ions which interconnect their pyrazolate fragments that behave as bis(monodentate) ligands. While in 1 one central amine of each macrocycle binds to the axial position of a distorted square-pyramid and the other ones remain protonated, in 2 all the amine groups are involved in the coordination giving rise to a strongly distorted octahedral geometry. Paramagnetic 1H NMR measurements support that these structures also form in solution. Interestingly, tetranuclear complexes [Cu4(H-1L4)2(OH)2.08](ClO4)2.92Br0.54Cl0.46 (3) and [Pd2.39Cu1.61(H-1L4)2(OH)2](ClO4)2Cl1.33Br0.67·2.87H2O (4) have been isolated for the macrocycle containing the 1,5,9,13-tetraamine chain (L4). 3 has two binucleating units, one of them formed by the pyrazolate moieties and their neighbouring secondary amines and the other by the two central amines of both macrocycles. This latter Cu2+ coordination site is completed by two hydroxide anions as bridging ligands. 4 was obtained from a solution prepared to achieve full formation of the dimeric cage [Cu2(H-1(HL4))2]4+ by addition of K2PdCl4. The Pd2+ ion due to its softer acidic characteristics displaces the Cu2+ ions from the pyrazolate site. UV-vis spectroscopy suggests that the exchange is completed at room temperature after one hour.
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Affiliation(s)
- Alberto Lopera
- Instituto de Ciencia Molecular, Universidad de Valencia, c/Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain.
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López-de-Uralde-Villanueva I, Gil-Martínez A, Candelas-Fernández P, de Andrés-Ares J, Beltrán-Alacreu H, La Touche R. Validity and reliability of the Spanish-language version of the self-administered Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) pain scale. Neurología (English Edition) 2018. [DOI: 10.1016/j.nrleng.2016.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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López-de-Uralde-Villanueva I, Gil-Martínez A, Candelas-Fernández P, de Andrés-Ares J, Beltrán-Alacreu H, La Touche R. Validity and reliability of the Spanish-language version of the self-administered Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) pain scale. Neurologia 2016; 33:505-514. [PMID: 27939112 DOI: 10.1016/j.nrl.2016.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 09/21/2016] [Revised: 10/15/2016] [Accepted: 10/17/2016] [Indexed: 01/21/2023] Open
Abstract
INTRODUCTION The self-administered Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) scale is a tool designed to identify patients with pain with neuropathic features. OBJECTIVE To assess the validity and reliability of the Spanish-language version of the S-LANSS scale. METHODS Our study included a total of 182 patients with chronic pain to assess the convergent and discriminant validity of the S-LANSS; the sample was increased to 321 patients to evaluate construct validity and reliability. The validated Spanish-language version of the ID-Pain questionnaire was used as the criterion variable. All participants completed the ID-Pain, the S-LANSS, and the Numerical Rating Scale for pain. Discriminant validity was evaluated by analysing sensitivity, specificity, and the area under the receiver operating characteristic curve (AUC). Construct validity was assessed with factor analysis and by comparing the odds ratio of each S-LANSS item to the total score. Convergent validity and reliability were evaluated with Pearson's r and Cronbach's alpha, respectively. RESULTS The optimal cut-off point for S-LANSS was ≥12 points (AUC=.89; sensitivity=88.7; specificity=76.6). Factor analysis yielded one factor; furthermore, all items contributed significantly to the positive total score on the S-LANSS (P<.05). The S-LANSS showed a significant correlation with ID-Pain (r=.734, α=.71). CONCLUSION The Spanish-language version of the S-LANSS is valid and reliable for identifying patients with chronic pain with neuropathic features.
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Affiliation(s)
- I López-de-Uralde-Villanueva
- Departamento de Fisioterapia, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Grupo de Investigación Motion in Brains, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Instituto de Neurociencia y Dolor Craneofacial (INDCRAN), Madrid, España; Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, España; Facultad de Ciencias de la Salud, Escuela Internacional de Doctorado, Universidad Rey Juan Carlos, Alcorcón, Madrid, España.
| | - A Gil-Martínez
- Departamento de Fisioterapia, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Grupo de Investigación Motion in Brains, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Instituto de Neurociencia y Dolor Craneofacial (INDCRAN), Madrid, España; Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, España
| | - P Candelas-Fernández
- Departamento de Fisioterapia, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España
| | - J de Andrés-Ares
- Unidad del Dolor, Servicio de Anestesiología, Hospital Universitario La Paz, Madrid, España
| | - H Beltrán-Alacreu
- Departamento de Fisioterapia, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Grupo de Investigación Motion in Brains, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Instituto de Neurociencia y Dolor Craneofacial (INDCRAN), Madrid, España
| | - R La Touche
- Departamento de Fisioterapia, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Grupo de Investigación Motion in Brains, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, España; Instituto de Neurociencia y Dolor Craneofacial (INDCRAN), Madrid, España; Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, España
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