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Related Concept Videos

Amplifying Signals via Enzymatic Cascade01:22

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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
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Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
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Related Experiment Video

Updated: Jan 19, 2026

Enhancing Chimeric Antigen Receptor-Extracellular Vesicles (CAR-EV) Technology: The Future of Cancer Therapy
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CAR-T Engineering: Optimizing Signal Transduction and Effector Mechanisms.

Emiliano Roselli1, Jeremy S Frieling2, Konrad Thorner1

  • 1Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.

Biodrugs : Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy
|September 26, 2019
PubMed
Summary

Chimeric antigen receptor (CAR)-T cell therapy shows promise for blood cancers. Research focuses on improving CAR-T cell design, including intracellular and extracellular domains, to enhance efficacy and safety for various cancers and challenging microenvironments.

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Area of Science:

  • Immunotherapy
  • Oncology
  • Cellular Engineering

Background:

  • Chimeric antigen receptor (CAR)-T cell therapy has demonstrated significant success in treating B cell malignancies.
  • This approach has progressed from preclinical studies to FDA approval for lymphomas and leukemia.
  • Current research aims to broaden CAR-T cell applications to other cancers and improve treatment outcomes.

Purpose of the Study:

  • To review modifications in CAR intracellular domains and their impact on CAR-T cell generations (first to next-generation).
  • To discuss enhancements in the antigen-sensing ectodomain for improved CAR-T cell signaling and function.
  • To explore the influence of tissue-specific factors on CAR-T cell efficacy in challenging microenvironments like bone and the central nervous system.

Main Methods:

  • Review of scientific literature on CAR-T cell design modifications.
  • Analysis of the impact of intracellular and ectodomain structures on CAR-T cell biology and function.
  • Discussion of clinical considerations for CAR-T cell therapy in specific anatomical sites.

Main Results:

  • Intracellular domain modifications have led to the development of multiple CAR-T cell generations with distinct biological effects.
  • Enhancements in the ectodomain structure can significantly improve CAR-T cell signaling and anti-tumor activity.
  • Tissue-specific factors present unique challenges for CAR-T cell efficacy in certain microenvironments.

Conclusions:

  • Optimizing CAR-T cell design, including both intracellular and extracellular components, is crucial for expanding therapeutic applications.
  • Further research into CAR signaling optimization is needed to overcome challenges posed by specific tissue microenvironments.
  • CAR-T cell therapy holds potential for treating a wider range of cancers, with ongoing advancements focusing on efficacy and safety.