Single-cell analysis of patients’ immune cells is offering unprecedented insights into how diseases develop, paving the way for more targeted and effective treatments. Using advanced sequencing technologies, scientists can now study thousands of cells individually, examining which genes are active in each one, explains Dr. Arivusudar John, Associate Director at Strand Life Sciences.
For decades, most biological research relied on bulk analysis—averaging signals from millions of cells to draw conclusions. While this approach has driven major medical advances, it often obscures crucial differences. Diseases like cancer or autoimmune disorders do not affect all cells uniformly; even neighboring cells can behave very differently. Understanding these subtle variations may hold the key to better therapies.
Revealing Hidden Patterns in Health and Disease
Single-cell methods allow scientists to track how genes are turned on or off, how cells communicate, and how they evolve—revealing complex patterns missed by conventional tests. The most common technique, single-cell RNA sequencing (scRNA-seq), reads the RNA of individual cells, providing a snapshot of gene activity at a precise moment.
“This approach is like listening to every voice in a crowd, not just the loudest,” says Dr. John. It helps explain why some cancer cells resist chemotherapy while others respond, and why some patients recover quickly from infections while others face long-term complications.
Indian Scientists Leading the Way
Indian researchers are rapidly adopting single-cell technologies. At the Tata Memorial Centre (TMC), Mumbai, and the Indian Institute of Science (IISc), Bengaluru, scientists are using single-cell sequencing to study oral cancer, one of the most common cancers in Indian men. By mapping how different cell types within the same tumor behave, they are laying the foundation for personalized treatments.
In a recent collaboration involving Strand Life Sciences, researchers applied single-cell sequencing to study uveitis, an inflammatory eye disease that can cause blindness. Examining immune cells individually revealed distinct patterns of immune activity, offering clues for more precise diagnostics and therapies.
Innovations Making Single-Cell Research Accessible
Single-cell research relies not only on biology but also on technology and data analysis. Indian engineers and biologists are developing tools like OptiDrop, a lab-on-a-chip device that analyzes cells within microscopic droplets. This high-precision approach reduces costs and equipment size, bringing advanced single-cell testing closer to hospitals and smaller labs.
Fighting Aggressive Cancers with Precision Tools
Single-cell studies are also advancing research on aggressive cancers. In triple-negative breast cancer, a form more prevalent in Indian women, these tools are uncovering why tumors resist current drugs. Similar studies are underway for skin, pancreatic, and stomach cancers, aiming to build precise, locally relevant data for treatment decisions.
Understanding Immune Health and Post-Covid Effects
Single-cell methods are reshaping knowledge of immune responses. Indian researchers have used them to study Covid-19, revealing that some patients’ immune systems do not fully reset after recovery. Other studies have focused on Kawasaki disease, a rare childhood blood vessel inflammation, helping refine diagnosis and therapy.
Leveraging India’s Genetic Diversity
India’s diverse population provides a unique opportunity for genomic research. Much global research is based on European or North American populations, which may not fully represent Indian biology. Single-cell studies on Indian patients can identify unique molecular signatures, improve diagnostics, and guide therapies for cancers and immune disorders prevalent in India.
“Local research reduces healthcare inequities,” Dr. John emphasizes. “When medical data reflects Indian biology, treatments are more effective, misdiagnoses drop, and expensive therapies are used more rationally.”
Building Capacity for the Future
As reported by pharmabiz.com, India’s growing investment in bioinformatics, computing infrastructure, and interdisciplinary training is critical for scaling single-cell research. Collaborations between research institutes and startups are strengthening the nation’s ability to harness these powerful tools for the benefit of patients.