Related Experiment Video

Updated: May 28, 2026

Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity
07:09

Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity

Published on: January 7, 2019

RIP1-mediated regulation of lymphocyte survival and death responses

Jianke Zhang1, Haibing Zhang, Jinghe Li

  • 1Department of Microbiology and Immunology, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA. jzhang@mail.jci.tju.edu

Immunologic Research
|November 1, 2011
PubMed

Insights

Receptor-interacting protein 1 (RIP1) is crucial for lymphocyte development and survival. RIP1 deficiency impairs B and T cell development and NF-κB activation, highlighting its diverse roles in immune cell signaling.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Receptor-interacting protein 1 (RIP1) is a kinase involved in death receptor (DR) signaling, initiating apoptosis.
  • RIP1 deletion causes perinatal lethality, with unexplained developmental defects.
  • Previous studies show RIP1 is essential for T cell development and TCR-induced NF-κB activation.

Purpose of the Study:

  • To investigate the role of RIP1 in B cell development and NF-κB activation.
  • To explore RIP1's function in lymphocyte survival and death signaling pathways.
  • To elucidate RIP1's role in mediating in vivo necroptosis.

Main Methods:

  • Analysis of RIP1-deficient (RIP1(-/-)) B cells stimulated via LPS/TLR4.
  • Assessment of NF-κB and Akt pathway activation in RIP1(-/-) B cells.
  • Evaluation of RIP1's role in reversing developmental defects in FADD-deficient mice.

Main Results:

  • RIP1 is critical for B cell development.
  • RIP1(-/-) B cells exhibit impaired NF-κB activation upon LPS/TLR4 stimulation but normal Akt pathway function.
  • RIP1 deficiency reverses embryonic and T cell proliferation defects in FADD-deficient mice, suggesting a role in necroptosis.

Conclusions:

  • RIP1 plays a vital role in both B and T cell development and function.
  • RIP1 is essential for NF-κB activation in B cells.
  • RIP1's involvement in necroptosis is critical for in vivo immune cell homeostasis.

More Related Videos

Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes09:40

Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes

Published on: September 28, 2018

Generation of a RIP1 Knockout U937 Cell Line Using the CRISPR-Cas9 System08:15

Generation of a RIP1 Knockout U937 Cell Line Using the CRISPR-Cas9 System

Published on: April 11, 2025

Related Concept Videos

Regulation of the Unfolded Protein Response01:31

Regulation of the Unfolded Protein Response

Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...