Adoptive cell therapy has emerged as a promising alternative treatment for hematological and solid cancers, with CAR-T therapy standing out as a prominent avenue. In this approach, T cells are genetically engineered with chimeric antigen receptors (CARs) to enhance their targeting capabilities^1–2. The outcome of CAR-T cell therapy hinges on a complex interplay of phenotype, activation, and functional profiling of these engineered cells. Immunophenotypic characterization of CAR-T cells assumes a pivotal role in ensuring treatment quality and facilitating continuous monitoring of treatment response¹. In the process of immunophenotyping, engineered T cells are separated based on their markers to characterize the composition of the cell population within the sample. The strategic identification and isolation of specific CAR-T cell subsets is essential in augmenting therapy responses².

Deciphering Cellular Composition, Defining CAR-T Therapy Efficacy

Immunophenotyping is a pivotal technique that combines specific antibodies with fluorescent compounds to reveal specific protein expression in cell populations to identify categorize the tagged cells. Immunophenotyping leverages the differences in surface markers among T cells, reflecting their differentiation, activation, and memory status². These markers provide insights into immune cell development, function, proliferation potential, and long-term viability. The distinct surface marker profiles closely correlate with the efficacy of CAR-T cell therapy³. Essential markers for immunophenotypic analysis, including CD3, CD4, CD8, CD45RA, CD34R0, CCR7, CD27, and CD95, are presented in Table 1.

So they volunteered for an experimental cholesterol-lowering treatment using gene editing that was unlike anything tried in patients before.

The result, reported Sunday by the company Verve Therapeutics of Boston at a meeting of the American Heart Association, showed that the treatment appeared to reduce cholesterol levels markedly in patients and that it appeared to be safe.

The trial involved only 10 patients, with an average age of 54. Each had a genetic abnormality, familial hypercholesterolemia, that affects around one million people in the United States. But the findings could also point the way for millions of other patients around the world who are contending with heart disease, which remains a leading cause of death. In the United States alone, more than 800,000 people have heart attacks each year.