.webp&w=384&q=75){kind=logo}
Loading, please wait...
Loading, please wait...
Recent advancements in analytical chemistry have introduced a novel approach to low-field NMR ligand binding studies. Researchers now utilize SABRE hyperpolarization at magnetic fields as low as 0.85 mT to monitor protein interactions. This technique effectively tracks hydrogen signals without traditional labeling. Moreover, by amplifying these signals, the method overcomes the inherent sensitivity issues of low-field spectroscopy.
Furthermore, low-field detection traditionally struggles to distinguish signals due to the lack of chemical shift. However, scientists successfully addressed this challenge by deuterating coligands and solvents. They also numerically account for the orthohydrogen signal produced during hyperpolarization. Consequently, this allows for the precise measurement of ligand hydrogen signals. Additionally, this technique is highly generalizable. It can detect any ligand that binds competitively to a target protein, expanding its use for high-throughput screening.
One significant benefit involves the calculation of the ligand dissociation constant (Kd). Specifically, in a milli-Tesla field, the spin-spin (R2) relaxation rate does not include exchange contributions. Therefore, the mathematical process becomes much simpler compared to traditional high-field NMR. This simplification could streamline high-throughput screening for new drug candidates and improve the study of complex biochemical processes.
SABRE stands for Signal Amplification by Reversible Exchange. It uses parahydrogen to hyperpolarize nuclei, providing the strong signals necessary for detection in low-field environments. Furthermore, it achieves signal enhancements of over a million-fold compared to standard thermal polarization.
At milli-Tesla fields, the relaxation rates do not have the complex exchange contributions found at high fields. Consequently, researchers can determine binding affinity using simpler formulas without the need for high-cost superconducting magnets.
No, the technique is highly versatile. It can detect any ligand that competes for a binding site, making it suitable for a wide range of studies involving different proteins and biochemical pathways.
Disclaimer: This content is for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.
References
Roy A et al. Label-Free Measurement of Ligand Interactions Using SABRE Hyperpolarization at Low Magnetic Fields. Anal Chem. 2026 Mar 10. doi: 10.1021/acs.analchem.5c07983. PMID: 41804755.
Zhivonitko VV et al. Biomolecular interactions studied by low-field NMR using SABRE hyperpolarization. Chem Sci. 2021;12(39):12950-12958. doi: 10.1039/d1sc02365f.
Read summarized clinical updates, watch expert medical content, and earn CME certifications right from your smartphone.
Open your smartphone camera to scan and install.
A summary of how low-field NMR combined with SABRE hyperpolarization provides a label-free way to measure protein-ligand binding affinities simply....
4 months ago
Andhra Pradesh reported 10 new Covid-19 cases, taking the state tally to 49 while deaths remain at four. With 24 patients hospitalized and 16 under home isolation, the Health Department has intensified monitoring. Medical professionals should review regional distribution, diagnostic protocols, and management plans.
Today
An 11-year Swedish registry study of 618 uterine sarcoma patients found that minimally invasive surgery yielded survival comparable to open surgery in early stages. However, adjuvant chemotherapy conferred no survival benefit in localized or advanced disease, highlighting stage and histology as key outcomes.
3 days back
A cross-sectional study evaluates post-intensive care syndrome in cardiac patients 2-4 weeks post-ICU discharge, highlighting cognitive, psychological, and functional impairments and the need for structured multidisciplinary rehabilitation.
3 days back
Anterior cruciate ligament reconstruction failure lacks uniform definition. A narrative review proposes an integrative framework incorporating objective and subjective instability, persistent pain, restricted motion, graft rupture, and secondary meniscal injury to standardize clinical reporting.
3 days back
With World Obesity Atlas data warning that over 41 million Indian children are overweight or obese, ICMR and NIN have unveiled a 10-point policy roadmap. The initiative calls for mandatory front-of-pack labeling, HFSS taxes, strict marketing bans, and healthier school environments to curb non-communicable diseases.
Today
