Cleavable Light-Erased Antibody Reporter (CLEAR) Technology
Why in News?
CLEAR Technology made news in May 2026 because Indian scientists from the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru (an autonomous institute of the Department of Science and Technology, DST) developed this novel imaging platform that can visualize an unprecedented number of proteins in the same biological sample using just a single fluorescent marker.
Core Developers and Institutions
- Lead Laboratory: Developed by a research team led by Prof. Sarit S. Agasti.
- Primary Institution: Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru—an autonomous institute under the Department of Science and Technology (DST).
- Collaborative Partner: Validated in complex, live immune cell systems in collaboration with the Indian Institute of Science (IISc), Bengaluru.
How CLEAR Technology Works?
- The Chalkboard Mechanism: The technique works like a standard chalkboard where written elements are wiped away to make room for new text.
- Single Fluorophore Staining: Scientists target specific proteins in a cell using antibodies chemically bound to a cleavable fluorescent tag.
- Microscopic Capture: The first set of targeted proteins is captured under a microscope within a specific optical window.
- Light-Driven Erasing: A gentle, non-toxic pulse of 365 nm LED light is applied to the sample for under two minutes. This light breaks the chemical bond, removing over 98% of the fluorescence signal without damaging the underlying tissue.
- Iterative Cycling: A new batch of proteins is introduced, labelled, and imaged using the exact same fluorescent marker and optical window. Repeating this cycle builds a highly dense, layered map of the sample's protein structure.
Key Advantages Over Existing Methods
- Virtually Unlimited Multiplexing: Traditional imaging requires different distinct colours (fluorophores) to see different proteins simultaneously, limiting researchers to 4 or 5 targets. CLEAR allows virtually unlimited protein visualization.
- Live-Cell Compatibility: Unlike older chemical clearing methods that use harsh, toxic reagents to strip dyes, CLEAR's light-based erasing features excellent biocompatibility, making it safe for delicate live cells and tissues.
- High Efficiency & Speed: Signal-clearing happens rapidly, saving hours compared to traditional time-intensive DNA or chemical-stripping approaches.
- Advanced Compatibility: The platform seamlessly adapts to highly complex imaging setups, including super-resolution microscopy.
Medical and Diagnostic Impact
- Early Disease Detection: It maps the precise spatial organization of cellular proteins, allowing pathologists to recognize the earliest structural signs of cancers and complex neurological disorders.
- Precision Medicine: Providing extensive molecular maps from single-cell biopsies helps physicians design targeted therapies customized to a patient's unique cellular layout.
- Immunology Research: The technology allows deep monitoring of complex immune responses, revealing how immune cells physically interact during infections or autoimmune diseases.
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