Ultra-Weak Photon Emission in Biological Systems: Mechanisms, Detection, and Biomedical Applications

Ultra-weak photon emission (UPE) represents a spontaneous light emission process occurring in biological systems, mainly originating from oxidative metabolic reactions and electronically excited molecular species. Over the past few decades, significant progress has been made in detecting these extremely low-intensity emissions through advanced photonic instrumentation such as photomultiplier tubes, electron-multiplying CCDs, and single-photon counting systems. Yet, despite technical improvements, the biological meaning and diagnostic potential of UPE remain subjects of ongoing debate. Current studies suggest strong associations between photon flux and metabolic activity, redox state, and cellular stress, raising the possibility that UPE could serve as a non-invasive indicator of physiological and pathological conditions. However, persistent methodological variability, insufficient quantitative calibration, and limited correlation with established biochemical and physiological metrics have hampered the field’s broader acceptance and integrative application in the life sciences. Progress now depends on stringent experimental design, standardized measurement protocols, and interdisciplinary validation linking photophysics to molecular biology.This Research Topic aims to advance the quantitative and mechanistic understanding of UPE across multiple scales, from molecular origins to potential biomedical applications. It seeks to consolidate experimental evidence connecting photon emission with oxidative metabolism, mitochondrial function, and cellular redox processes, while fostering innovation in detection and signal analysis. The Topic also aspires to define rigorous validation strategies that anchor photonic observations in reproducible photochemical and physiological frameworks. Contributors are encouraged to focus on measurable, experimentally testable hypotheses, ensuring claims are grounded in reproducible data rather than speculative or theoretical propositions. Ultimately, the goal is to place UPE research on a robust scientific foundation that enhances its reliability and translational relevance.To gather further insights into the mechanisms, measurement, and biomedical relevance of UPE, we welcome articles that address, but are not limited to, the following themes:- Reactive oxygen species and oxidative metabolism as photon-emission sources- Mitochondrial dynamics and energy-dependent emission pathways- Advances in optical detection, calibration, and signal processing for ultra-weak light- Quantitative correlations between photon emission, biochemical markers, and physiological parameters- Cross-validation of UPE with complementary imaging and spectroscopic modalities (e.g., fMRI, NIRS, EEG)- Standardization of measurement protocols and reproducibility frameworks- Theoretical and computational modeling validated by empirical data- Translational and clinical applications demonstrating quantitative, diagnostic, or prognostic valueTopic Editor Dr. Vahid Salari is the founder and Chief Scientific Officer (CSO) of vivotraQ Technologies Inc., a company that develops and commercialises ultra-weak photon emission detection technology. Dr. Salari will recuse himself from all editorial decisions involving manuscripts that relate to, or could reasonably be seen to benefit, vivotraQ's commercial interests. The other Topic Editors declare no competing interests with regard to the Research Topic subject. Topic editors: Vladislav Toronov, Vahid Salari, Ankush Prasad Source: https://www.frontiersin.org/research-topics/81417/ultra-weak-photon-emission-in-biological-systems-mechanisms-detection-and-biomedical-applications