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Posts Taged molecular-gates

COVID-19 detection system: a fast, cheap and easy to use alternative to PCR.

PCR (acronym in English for “Polymeric Chain Reaction”), is a type of diagnostic test for the detection of infectious diseases. The PCR diagnosis of COVID-19 used since the outbreak of the pandemic offers a high level of specificity and sensitivity but presents a certain degree of complexity, requiring specialized personnel and is expensive.

Researchers from Polytechnic University of Valencia (UPV), the Foundation for the Promotion of Health and Biomedical Research of the Valencian Community (FISABIO), the La Fe Health Research Institute (IIS La Fe) and the consortium Centro de Investigación Biomédica en Red de Bioengineering, Biomateriales y Nanomedicina (CIBER-BBN) has been working, during the pandemic. Within the framework of the Diacovid project, different tests have been carried out with a first prototype of a rapid point-of-care (POC) test, based on nanosystems with molecular gates, that would detect quickly, reliably and easily, SARS-CoV-2.

Ramón Martínez Máñez, Scientific Director of Nanbiosis U26 NMR: Biomedical Applications II explains the advantages of POC techniques as their ability to diagnose in sites with limited infrastructure, without specially qualified staf and without the requirement to transport the sample to a centralized facility. In addition, POC technologies are global detection tools for surveillance against possible new outbreaks in the future. Its use would allow the rapid implementation of containment measures, reduction of therapeutic response times, in situ detection and the use of a low sample volume.

Further information and News in UPV TV

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New sensor for quick and easy detection of ecstasy

Spanish, Danes and Austrian researchers, including the group led by Ramón Martínez Mánez, coordinator of Unit 26 of NANBIOSIS, have developed a new sensor to detect ecstasy in a simple, reliable, fast and selective way.

Until now, this drug is detected by techniques such as capillary electrophoresis, spectroscopy or chromatography that require the use of expensive technical equipment and qualified personnel. The new method offers the advantages of easy use, low cost and high reliability according to Beatriz Lozano, a researcher at the Interuniversity Institute for Research on Molecular Recognition and Technological Development at the Universitat Politècnica de València and the group led by Ramón Martínez Mañez.

The sensor consists of a hybrid material including an inorganic carrier charged with a dye -fluorescein- and functionalized with an organic molecule derived from naphthol.

The dye is retained when the bluebox-molecule widely used in chemistry- is coordinated to the naphthol forming a molecular gate and in the presence of ecstasy in the analyzed sample, a variation of the fluorescence occurs, whose intensity varies as a function of the concentration of Drug detected.

“The affinity of BlueBox for different neurotransmitters such as dopamine had already been described, and because of the structural similarity between that neurotransmitter and ecstasy, we thought it would be a good idea to try to open the “molecular gate” in the presence of the drug and release the dye that gives the fluorogenic response”, explains Beatriz Lozano.

The characterization of the products by NMR was carried out by using facilities from NANBIOSIS-ICTS (unit 26)

Researchers are currently working on a new sensor for the detection of other synthetic drugs.

Reference Article:

Beatriz Lozano-Torres, Lluís Pascual, Andrea Bernardos, María D. Marcos, Jan O. Jeppesen, Yolanda Salinas, Ramón Martínez-Máñez and Felix Sancenón. Pseudorotaxane capped mesoporous silica nanoparticles for 3,4-methylenedioxymethamphetamine (MDMA) in water detection. Chem. Commun., 2017, 53, 3559. DOI: 10.1039 / C7CC00186J

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New implants for the treatment of infections and bone tumours

Researchers of Unit 26 of NANBIOSIS participate in the design and evaluation of the cellular level of a new hybrid material for the creation of intelligent-scaffolds implants that open the door to a more efficient treatment of infections and bone tumors.

The main novelty is the incorporation of a mesoporous matrix of silicon, calcium and phosphorus oxides, with molecular gates that would allow the controlled release of substances stored inside the pores, such as antitumor drugs or antibiotics. A molecular gate is a mechanism whose opening depends on certain external stimuli, in this particular case the drugs would only be released in the presence of enzymes associated with a tumor or a infection in the bones.Nowadays there are scaffolds that allow the slow release of a drug, but this is produced automatically and non-specific.

Molecular gates have been characterized by the use of the Nuclear Magnetic Resonance Unit 26 of NANBIOSIS


Article of reference:

Lorena Polo, Natividad Gómez-Cerezo, Elena Aznar, José-Luis Vivancos, Félix Sancenón. Daniel Arcos, MaríaVallet-Regí, Ramón Martínez-Máñez. Molecular gates in mesoporous bioactive glasses for the treatment of bone tumors and infection. Acta Biomaterialia. http://dx.doi.org/10.1016/j.actbio.2016.12.025.


U 26 NANBIOSIS - New implants for the treatment of infections and bone tumours
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