Category Archives: Publicación

2020, Publicación

García-Marín et al. ChemMedChem. 2020;15(19):1788-1801. Pyrrolo[1,2-a]quinoxalines: Insulin Mimetics that Exhibit Potent and Selective Inhibition against Protein Tyrosine Phosphatase 1B

Publications > García-Marín et al

ChemMedChem 2020, 15, 1788 PubMed 32909701

Pyrrolo%@5B1,2-a%@5Dquinoxalines: Insulin Mimetics that Exhibit Potent and Selective Inhibition against Protein Tyrosine Phosphatase 1B.

Javier García-Marín1, Mercedes Griera2, Patricia Sánchez-Alonso3, Bruno Di Geronimo2, Francisco Mendicuti4, Manuel Rodríguez-Puyol1, Ramón Alajarín5, Beatriz de Pascual-Teresa6, Juan J Vaquero3, Diego Rodríguez-Puyol2

1. Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, 28805, Alcalá de Henares, Spain.  2. Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Ctra. Colmenar Viejo, km. 9100, 28034, Madrid, Spain.  3. Instituto de Investigación Química Andrés M. del Río, Facultad de Farmacia, Universidad de Alcalá, 28805, Alcalá de Henares, Spain.  4. Departamento de Biología de Sistemas, Universidad de Alcalá, 28805, Alcalá de Henares, Spain.  5. Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo CEU, 28925, Alcorcón, Spain.  6. Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, 28805, Alcalá de Henares, Spain.

Keywords: PTP1B; biological activity; inhibitors; insulin mimetics; pyrrolo%@5B1,2-a%@5Dquinoxaline

Abstract

PTP1B dephosphorylates insulin receptor and substrates to modulate glucose metabolism. This enzyme is a validated therapeutic target for type 2 diabetes, but no current drug candidates have completed clinical trials. Pyrrolo%@5B1,2-a%@5Dquinoxalines substituted at positions C1-C4 and/or C7-C8 were found to be nontoxic to cells and good inhibitors in the low- to sub-micromolar range, with the 4-benzyl derivative being the most potent inhibitor (0.24 μm). Some analogues bearing chlorine atoms at C7 and/or C8 kept potency and showed good selectivity compared to TCPTP (selectivity index >40). The most potent inhibitors behaved as insulin mimetics by increasing glucose uptake. The 4-benzyl derivative inhibited insulin receptor substrate 1 and AKT phosphorylation. Molecular docking and molecular dynamics simulations supported a putative binding mode for these compounds to the allosteric α3/α6/α7 pocket, but inconsistent results in enzyme inhibition kinetics were obtained due to the high tendency of these inhibitors to form stable aggregates. Computational calculations supported the druggability of inhibitors.

2020, Publicación, Renal

Miguel et al. Nefrologia. 2020;:. The pHLIP system as a vehicle for microRNAs in the kidney.

Publications > Miguel et al

Nefrologia. 2020, 40, 491

The pHLIP system as a vehicle for microRNAs in the kidney.

Verónica Miguel1, a, Carlos Rey2, José Luis Aceña3, Francisco Maqueda3, Carlos Fernández-Hernando4, Diego Rodríguez-Puyol5, Juan J Vaquero3, Santiago Lamas2

1. Programa de Procesos Fisiológicos y Patológicos, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, España. Electronic address:.  2. Programa de Procesos Fisiológicos y Patológicos, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, España.  3. Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química Andrés M. del Río (IQAR), Universidad de Alcalá, IRYCIS, Alcalá de Henares, Madrid, España.  4. Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine and Department of Pathology, Yale University School of Medicine, New Haven, Connecticut, Estados Unidos.  5. Department of Medicine and Medical Specialties, Research Foundation of the University Hospital Príncipe de Asturias, IRYCIS, Alcalá University, Alcalá de Henares, Madrid, España.

a. vmiguel@cbm.csic.es

Palabras clave: Fibrosis renal; PNA; PNAs; Renal fibrosis; miRNA; miRNAs; pHLIP

Resumen

MicroRNAs (miRNAs) are small endogenous RNAs that regulate gene expression through post-transcriptional repression of their target messenger RNAs. A study of changes in expression of certain miRNAs in the kidney has supplied evidence on their pathogenic role and therapeutic potential in nephrology. This review proposes a nanotechnology approach based on the binding of analogs or inhibitors of miRNAs formed by peptide nucleic acids (PNAs) to peptides with a transmembrane structure sensitive to a low pH, called pHLIPs (pH %@5Blow%@5D insertion peptides). The review draws on the concept that an acidic pH in the microenvironment of the renal tubule may facilitate concentration and distribution of the pHLIP-PNA complex in this organ. In this context, we have demonstrated for the first time that targeted administration of miR-33 inhibitors with the pHLIP system effectively prevents the development of renal fibrosis, thus opening up this technology to new strategies for diagnosis and treatment of kidney diseases.

2020, Publicación

Altarejos et al. Eur J Org Chem. 2020:3024-3029. Practical Solvent-Free Microwave-Assisted Hydroboration of Alkynes

Publications > Altarejos et al

Eur. J. Org. Chem. 2020, 3024

Practical Solvent-Free Microwave-Assisted Hydroboration of Alkynes.

Julia Altarejos, David Sucunza, Juan J Vaquero, Javier Carreras

Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, IRYCIS, 28805 Madrid, Alcalá de Henares, Spain.

. javier.carreras@uah.es

Abstract

A simple and rapid protocol for the anti-Markovnikov hydroboration of alkynes assisted by microwave irradiation has been developed. Pinacolborane smoothly reacts with terminal alkynes to obtain (E)-alkenyl boronates in good yields and short reactions times in the absence of solvent. Further transformations on the carbon-boron bond of the adducts can be sequentially achieved without the need of purifying the alkenyl boronates.

2020, AzaBN, Publicación

Abengozar et al. Chem Commun (Camb). 2020;56(25):3669-3672. Expanding the BN-embedded PAH family: 4a-aza-12a-borachrysene.

Publications > Abengozar et al

Chem Commun 2020, 56, 3669 PubMed 32115593

Expanding the BN-embedded PAH family: 4a-aza-12a-borachrysene.

Alberto Abengozara, Isabel Valencia, Guillermo G Otarola, David Sucunza, Patricia Garcia-Garcia, Adrian Perez-Redondo, Francisco Mendicuti, Juan J Vaquero

Departamento de Quimica Organica y Quimica Inorganica, Instituto de Investigacion Quimica "Andres M. del Rio" (IQAR), Universidad de Alcala, IRYCIS, 28805 Alcala de Henares, Spain.

a. david.sucunza@uah.es, juanjose.vaquero@uah.es

Abstract

Previously unknown 4a-aza-12a-borachrysene has been synthesized in only four steps. The reactions of this BN-embedded PAH with bromine and organolithium compounds proceed with complete regioselectivity, resulting in the formation of nine derivatives. One of these, a phenylalkynyl-substituted derivative, exhibits a remarkably high fluorescence quantum yield (PhiF = 0.68).

2020, BioImag, Publicación

Garre et al. J Org Chem. 2020;85(2):441-448. Synthesis and Photophysical Behavior of a Highly Fluorescent Family of Unsymmetrical Organoboron Complexes Containing 5-(Pyridin-2-ylmethylene)imidazolidine-2,4-dione Moieties.

Publications > Garre et al

J Org Chem. 2020, 85, 441 PubMed 31858801

Synthesis and Photophysical Behavior of a Highly Fluorescent Family of Unsymmetrical Organoboron Complexes Containing 5-(Pyridin-2-ylmethylene)imidazolidine-2,4-dione Moieties.

M Soledad Garre1, Raul Losantos2, Sara Gutierrez1, David Sucunza1, Patricia Garcia-Garcia1, Diego Sampedro2, Juan J Vaquero1

1. Departamento de Quimica Organica y Quimica Inorganica, Instituto de Investigacion Quimica "Andres M. del Rio" (IQAR) , Universidad de Alcala, IRYCIS , 28805 Alcala de Henares , Spain.  2. Departamento de Quimica, Centro de Investigacion en Sintesis Quimica (CISQ) , Universidad de La Rioja , Madre de Dios 53 , 26006 Logrono , Spain.

Abstract

A new and highly fluorescent family of unsymmetrical organoboron complexes containing 5-(pyridin-2-ylmethylene)imidazolidine-2,4-dione moieties has been synthesized in three steps. These compounds show strong absorptions covering a wide range of the UV-vis spectrum and are strongly emissive (varphif of up to 0.92 in CH3CN). Moreover, two fluorophores that include an alkyne or an azide group at the end of the alkyl chain and with potential utility in bioorthogonal chemistry have been developed. One of these, in which the glycol substituent provides an enhanced water solubility without compromising the fluorescence (varphif = 0.85 in water), may be of particular importance.

2019, AzaBN, Publicación

Abengozar et al. J Org Chem. 2019;84(11):7113-7122. A New Member of the BN-Phenanthrene Family: Understanding the Role of the B-N Bond Position.

Publications > Abengozar et al

J Org Chem. 2019, 84, 7113

A New Member of the BN-Phenanthrene Family: Understanding the Role of the B-N Bond Position.

Alberto Abengozar1, David Sucunza1, Patricia Garcia-Garcia1, Diego Sampedro2, Adrian Perez-Redondo1, Juan J Vaquero1

1. Departamento de Quimica Organica y Quimica Inorganica, Instituto de Investigacion Quimica "Andres M. del Rio" (IQAR) , Universidad de Alcala , 28805 Alcala de Henares , Spain.  2. Departamento de Quimica, Centro de Investigacion en Sintesis Quimica (CISQ) , Universidad de La Rioja , Madre de Dios 53 , 26006 Logrono , Spain.

Abstract

3,4-Dihydro-4-aza-3-boraphenanthrene, which shows the highest fluorescence quantum yield of all nonsubstituted BN-phenanthrenes reported to date (varphiF = 0.61), has been synthesized in only three steps (76% overall yield) from easily accessible 1-bromo-2-vinylnaphthalene, along with several substituted derivatives. The reactivity of these previously unknown BN-aromatic compounds toward organolithium compounds and bromine has been studied. This latter reaction affords bromo-substituted compounds that are suitable for further functionalization via Suzuki and Sonogashira couplings, with complete regioselectivity. The optical properties and excited state deactivation mechanisms of selected compounds were studied using computational methods.

2019, AzaBN, Publicación

Abengozar et al. Beilstein J Org Chem. 2019;15:1257-1261. Remarkable effect of alkynyl substituents on the fluorescence properties of a BN-phenanthrene.

Publications > Abengozar et al

Beilstein J. Org. Chem. 2019, 15, 1257 PubMed 31293672

Remarkable effect of alkynyl substituents on the fluorescence properties of a BN-phenanthrene.

Alberto Abengozar, David Sucunza, Patricia Garcia-Garcia, Juan J Vaquero

Departamento de Quimica Organica y Quimica Inorganica, Instituto de Investigacion Quimica "Andres M. del Rio" (IQAR), Universidad de Alcala, 28871-Alcala de Henares, Madrid, Spain.

Keywords: BN-phenanthrene; alkyne; cross-coupling; fluorescence; heterocycles

Abstract

A series of BN-phenanthrenes with substituents of a diverse nature have been synthesized by palladium-catalyzed cross-coupling reactions of a common chloro-substituted precursor, which was made from readily available materials in only four steps. Evaluation of the photophysical properties of the prepared compounds unveiled an impressive effect of the presence of alkynyl substituents on the fluorescence quantum yield, which improved from 0.01 in the parent compound to up to 0.65 in derivatives containing a triple bond.

2019, Publicación, Renal

Valino-Rivas et al. Trends Mol Med. 2019;25(4):341-360. NIK as a Druggable Mediator of Tissue Injury.

Publications > Valino-Rivas et al

Trends Mol Med. 2019, 25, 341 PubMed 30926358

NIK as a Druggable Mediator of Tissue Injury.

Lara Valino-Rivas1, Juan Jose Vaquero2, David Sucunza2, Sara Gutierrez2, Ana B Sanz1, Manuel Fresno3, Alberto Ortiz1, 4, a, Maria Dolores Sanchez-Nino1, 4, a

1. Department of Nephrology and Hypertension, Instituto de Investigacion Sanitaria (IIS) Fundacion Jimenez Diaz, School of Medicine, Universidad Autonoma de Madrid (UAM), Red de Investigacion Renal (REDINREN), and Fundacion Renal Inigo Alvarez de Toledo (FRIAT), Madrid, Spain.  2. Departamento de Quimica Organica y Quimica Inorganica, Universidad de Alcala and REDINREN, Madrid, Spain.  3. Centro de Biologia Molecular Severo Ochoa, Consejo Superior de Investigaciones Cientificas de la UAM, Madrid, Spain.  4. These authors contributed equally. Electronic address:.

a. aortiz@fjd.es  a. mdsanchez@fjd.es

Keywords: *MAP3K14; *NIK; *TWEAK; *acute kidney injury; *apoptosis; *autoimmunity; *cell death; *chronic kidney disease; *cirrhosis; *diabetes; *epigenetic; *esteatohepatitis; *hepatitis; *inflammation; *mantle lymphoma; *myeloid leukemia; *osteoporosis; *sarcopenia; *verteporfin

Abstract

NF-kappaB-inducing kinase (NIK, MAP3K14) is best known as the apical kinase that triggers non-canonical NF-kappaB activation and by its role in the immune system. Recent data indicate a role for NIK expressed by non-lymphoid cells in cancer, kidney disease, liver injury, glucose homeostasis, osteosarcopenia, vascular calcification, hematopoiesis, and endothelial function. The spectrum of NIK-associated disease now ranges from immunodeficiency (when NIK is defective) to autoimmunity, cancer, sterile inflammation, fibrosis, and metabolic disease when NIK is overactive. The development of novel small-molecule NIK inhibitors has paved the way to test NIK targeting to treat disease in vivo, and may eventually lead to NIK targeting in the clinic. In addition, NIK activators are being explored for specific conditions such as myeloid leukemia.

2019, AzaBN, Publicación

Abengozar et al. Org Lett. 2019;21(8):2550-2554. Synthesis, Functionalization, and Optical Properties of 1,2-Dihydro-1-aza-2-boraphenanthrene and Several Highly Fluorescent Derivatives.

Publications > Abengozar et al

Org Lett. 2019, 21, 2550 PubMed 30951317

Synthesis, Functionalization, and Optical Properties of 1,2-Dihydro-1-aza-2-boraphenanthrene and Several Highly Fluorescent Derivatives.

Alberto Abengozar1, Patricia Garcia-Garcia1, David Sucunza1, Diego Sampedro2, Adrian Perez-Redondo1, Juan J Vaquero1

1. Departamento de Quimica Organica y Quimica Inorganica, Instituto de Investigacion Quimica "Andres M. del Rio" (IQAR) , Universidad de Alcala , 28805 Alcala de Henares , Spain.  2. Departamento de Quimica, Centro de Investigacion en Sintesis Quimica (CISQ) , Universidad de La Rioja , Madre de Dios 53 , 26006 Logrono , Spain.

Abstract

Previously unknown 1,2-dihydro-1-aza-2-boraphenanthrene has been synthesized in only three steps from 2-bromo-1-vinylnaphthalene. The reactivity of this new BN-phenanthrene, and of several substituted derivatives, has been tested against bromine and organolithium compounds. Bromination proceeded with complete regioselectivity, affording bromo-substituted compounds suitable for further functionalization via cross-coupling reactions. This new family of BN-phenanthrenes exhibits a substantial increase in the quantum yield (up to varphiF = 0.93) with respect to phenanthrene.

2019, Au, Publicación

Garre et al. J Org Chem. 2019;:. Regiodivergent Electrophilic Cyclizations of Alkynylcyclobutanes for the Synthesis of Cyclobutane-Fused O-Heterocycles.

Publications > Garre et al

J. Org. Chem. 2019, 84, 9, 5712 PubMed 30896164

Regiodivergent Electrophilic Cyclizations of Alkynylcyclobutanes for the Synthesis of Cyclobutane-Fused O-Heterocycles.

M Soledad Garre1, David Sucunza1, Enrique Aguilar2, Patricia Garcia-Garcia1, Juan J Vaquero1

1. Departamento de Quimica Organica y Quimica Inorganica, Campus Cientifico-Tecnologico, Facultad de Farmacia , Universidad de Alcala (IRYCIS) , Autovia A-II, Km 33.1 , 28805 Alcala de Henares , Madrid , Spain.  2. Departamento de Quimica Organica e Inorganica, Instituto Universitario de Quimica Organometalica "Enrique Moles" , Universidad de Oviedo , C/Julian Claveria, 8 , 33006 Oviedo , Spain.

Abstract

Cyclobutane-fused dihydropyrans and methylenetetrahydrofurans are highly interesting cores found in numerous natural products. Both these cores are selectively prepared from a common alkynylcyclobutane precursor bearing an appended hydroxyl group herein. Thus, cyclobutane-fused dihydropyrans can be obtained by a selective 6-endo-dig iodocyclization, whereas gold-catalyzed 5-exo-dig cycloisomerization provides a bicyclic core containing a methylenetetrahydrofuran moiety as major product. Several cyclobutane-fused O-heterocycles with diverse substituents are synthesized following the reported methodology.