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Posts Taged monoclonal-antibodies

New results evidence new biomarkers for early diagnosis of P. aeruginosa infections

Pseudomonas aeruginosa is a common multidrug-resistant pathogen that causes acute and chronic infections. However, P. aeruginosa, as many other bacterial species, has developed resistance to antibiotics being difficult to treat. For this reason diagnostic methods allowing detection at early  stages of the infection are required  and, therefore, efficient biomarkers of infection are very helpful. These fast diagnosis will help on the subsequent therapeutic treatment.

The Nb4D group of CIBER-BBN and IQAC-CSIC (led by M.-Pilar Marco) has recently conducted a research to develop a highly sensitive, specific and reliable immunochemical assay to detect pyocyanin (PYO), one of the most important virulence factors of Pseudomonas aeruginosa.

The assay uses a high-affinity monoclonal antibody produced by the unit 2 of the ICTS NANBIOSIS Custom Antibody Service (CAbS) (Dr. Núria Pascual).

The microplate-based ELISA developed is able to achieve a limit of detection (LoD) of 0.07 nM, which is much lower than the concentrations reported to be found in clinical samples (130 µM in sputa and 2.8 µM in ear secretions). The ELISA has allowed the investigation of the release kinetics of PYO and 1-OHphz (the main metabolite of PYO) of clinical isolates from P. aeruginosa-infected patients. Significant differences have been found between clinical isolates obtained from patients suffering an acute or a chronic infection (~6,000 nM vs. ~8 nM of PYO content, respectively).

The results found point to a real potential of PYO as a biomarker of P. aeruginosa infection and the possibility to use such virulence factor also as a biomarker for patient stratification and for an effective management of these kinds of infections.

Article of referece:

Rodriguez-Urretavizcaya, B., Pascual, N., Pastells, C., Martin-Gomez, M.-T., Vilaplana, Ll.*, Marco. M.-P. (2021). “Diagnosis and Stratification of Pseudomonas aeruginosa Infected Patients by Immunochemical Quantitative Determination of Pyocyanin From Clinical Bacterial Isolates.” Frontiers in Cellular and Infection Microbiology 11(1215). https://doi.org/10.1016/j.jmbbm.2021.104793

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High quality antibodies for very challenging projects

Researchers of Nb4D group – Unit 2 of the ICTS NANBIOSIS (led by Pilar Marco, from CIBER-BBN and the IQAC-CSIC) have participated in Expoquimia 2021, the International Chemistry Meeting, which took place from 14 to September 17 at the Fira de Barcelona.

The researchers presented their work in several projects: the FoodSmartPhone project (MSCA-ITN-720325 action), the QS4CF (RTI2018-096278-B-C21), the QS-Motion (TV32018-201825-30-31) and on the PoC4CoV project (PIE-202050E090; PTI Salud Global, CSIC).

Research at the FoodSmartPhone(MSCA-ITN-720325 action) is focus on developing devices for the monitoring of contaminants of interest in food safety through the use of mobile phones. The production of the necessary antibodies for the detection of antibiotics and pesticides has been carried out by NANBIOSIS U2 Custom Antibody Service (CAbS). These are very specific monoclonal antibodies against pesticides, used by researchers Klaudia Kopper and Julian Guercetti to bind them to the functionalized surface and implemented in plasmonic detection sensors for antibiotics in milk and electrochemical biosensors for the detection of pesticides in cereals.

The scientific activity within the QS4CF (RTI2018-096278-B-C21) and QS-Motion (TV32018-201825-30-31) is focused on the Quorum Sensing communication system as an strategy to develop more efficient and specific diagnostic tools and therapeutic approaches to diagnose and treat P. aeruginosa and S. aureus infections.

The PoC4CoV project (PTI Salud Global, CSIC) seeks a comprehensive approach to diagnose COVID-19 developing devices to detect genetic material and proteins of the SARS-CoV2 virus, but also the response of the host against the infection. High quality antibodies against SARS-CoV-2 structural proteins (spike and nucleocapsid) have been produced by CAbS at NANBIOSIS

The camera flash is able to excite the functionalized surface of the chip and generate the specific response to the contaminant. This signal is picked up by the mobile through a Bluetooth connection and quantified.

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Highly sensitive monoclonal antibodies for a new biosensor for hormones detection in fertility treatments

Nb4D research group and NANBIOSIS U2 Custom Antibody Service (CAbS) of CIBER-BBN at the IQAC-CSIC, together with the company Droplite Technologies have obtained a Retos-Collaboration project funded by the Ministry of Science and Innovation, for the development of a biosensor for detection and rapid quantification of hormones, linked to in-vitro fertility treatments.

NANBIOSIS U2 CAbS will be responsible for the production of highly sensitive monoclonal antibodies, counting on the experience in this field of Juan Pablo Salvador, project coordinator, Núria Pascual and Mª Pilar Marco.

The measurement of the hormone estradiol is a key indicator, both of maturity and of the degree of ovarian stimulation, very important in a successful fertilization process. But there are no tools that allow accurate and sensitive monitoring.

Thus, the consortium formed by Nb4D-Droplite proposes as a solution a new device to perform the control and quantification of hormones, in particular estradiol, in less than 30 minutes, without the need for a central laboratory and only using a drop of blood, which is obtained simply by pricking the patient’s finger.

With funding of € 388,531, the project strategy consists of a transversal collaboration between the Droplite company and the CIBER-BBN research center, through the Nb4D group, supported by the Hospital Clínic de Barcelona, ​​which allows a continuous evaluation and optimization of the prototype based on the exchange of experiences and knowledge.

On the other hand, Droplite, led by its co-founders André Guedes and Rafael Porcar, contributes its experience in the development of an optical detection system based on nanotechnology, which will allow to detect and monitor, automatically and quantitatively, different markers and provide results in just 10 minutes. Droplite is dedicated to the biotechnology sector that emerged as a spin-off of the Institute of Photonic Sciences (ICFO)

The call Retos Colaboración

The aid of this call, managed by the Ministry of Science and Innovation and the State Research Agency, aims to support experimental development projects in cooperation between companies and research organizations, in order to promote the development of new technologies, business application of new ideas and techniques, and contribute to the creation of new products and services.

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