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Related Concept Videos

Inflammatory Response01:28

Inflammatory Response

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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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...
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Related Experiment Video

Updated: Jul 20, 2025

A Mouse Model of Vascularized Heterotopic Spleen Transplantation for Studying Spleen Cell Biology and Transplant Immunity
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Splenic SUMO1 controls systemic inflammation in experimental sepsis.

Ayman Youssef1, Bilal Khan Mohammed1, Abhishek Prasad1

  • 1Center for Perioperative Organ Protection, Department of Anesthesiology, Duke University Medical Center, Durham, NC, United States.

Frontiers in Immunology
|July 31, 2023
PubMed
Summary

TAK981, a SUMOylation inhibitor, improved survival in sepsis by boosting immune responses. Spleen SUMO1 regulation is key to modulating immune and metabolic responses during bacterial infections.

Keywords:
SUMOTAK981infectionorgan functionsepsisspleen

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Area of Science:

  • Immunology
  • Molecular Biology
  • Sepsis Research

Background:

  • TAK981 (Subasumstat) is a novel SUMOylation inhibitor with potential in cancer immunotherapy.
  • Cancer patients face increased infection risk, but TAK981's effects on sepsis are unknown.
  • Previous research on SUMOylation in infections yielded conflicting results.

Purpose of the Study:

  • To investigate the effects of TAK981 on immune responses and survival in experimental sepsis models.
  • To elucidate the role of the spleen and SUMOylation (SUMO1 and SUMO3) in sepsis pathogenesis.
  • To determine if TAK981 can modulate immune and metabolic responses during bacterial infection.

Main Methods:

  • Utilized polymicrobial peritonitis (CLP) and LPS endotoxemia models in mice.
  • Investigated the impact of splenectomy on sepsis outcomes and immune responses.
  • Employed Western blotting to analyze SUMO-conjugated proteins in spleen lysates.
  • Used global SUMO1 and SUMO3 knockout mice and splenocyte adoptive transfer to assess specific SUMO regulation.

Main Results:

  • TAK981 enhanced survival in mild polymicrobial peritonitis by improving innate immunity and bacterial clearance.
  • In LPS endotoxemia, TAK981 boosted early TNFα production but did not alter inflammation resolution.
  • Splenectomy significantly reduced serum TNFα levels and TAK981-mediated responses.
  • Endotoxemia showed specific SUMO1 and SUMO2/3 conjugation in the spleen, both inhibited by TAK981.
  • SUMO1 deficiency, but not SUMO3, exacerbated TNFα production and metabolic acidosis in endotoxemia.
  • Transfer of SUMO1-null splenocytes worsened endotoxemia outcomes in splenectomized mice.

Conclusions:

  • TAK981 demonstrates potential therapeutic benefits in sepsis by modulating innate immune responses.
  • Splenic SUMO1 plays a critical role in regulating immune and metabolic responses to bacterial infections.
  • Targeting splenic SUMO1 may offer a novel strategy for managing sepsis.