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Stromal Progenitor Cells in Mitigation of Non-Hematopoietic Radiation Injuries

Overview
Specialty Pathology
Date 2017 May 3
PMID 28462013
Citations 4
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Abstract

Purpose Of Review: Therapeutic exposure to high doses of radiation can severely impair organ function due to ablation of stem cells. Normal tissue injury is a dose-limiting toxicity for radiation therapy (RT). Although advances in the delivery of high precision conformal RT has increased normal tissue sparing, mitigating and therapeutic strategies that could alleviate early and chronic radiation effects are urgently needed in order to deliver curative doses of RT, especially in abdominal, pelvic and thoracic malignancies. Radiation-induced gastrointestinal injury is also a major cause of lethality from accidental or intentional exposure to whole body irradiation in the case of nuclear accidents or terrorism. This review examines the therapeutic options for mitigation of non-hematopoietic radiation injuries.

Recent Findings: We have developed stem cell based therapies for the mitigation of acute radiation syndrome (ARS) and radiation-induced gastrointestinal syndrome (RIGS). This is a promising option because of the robustness of standardized isolation and transplantation of stromal cells protocols, and their ability to support and replace radiation-damaged stem cells and stem cell niche. Stromal progenitor cells (SPC) represent a unique multipotent and heterogeneous cell population with regenerative, immunosuppressive, anti-inflammatory, and wound healing properties. SPC are also known to secrete various key cytokines and growth factors such as platelet derived growth factors (PDGF), keratinocyte growth factor (KGF), R-spondins (Rspo), and may consequently exert their regenerative effects via paracrine function. Additionally, secretory vesicles such as exosomes or microparticles can potentially be a cell-free alternative replacing the cell transplant in some cases.

Summary: This review highlights the beneficial effects of SPC on tissue regeneration with their ability to (a) target the irradiated tissues, (b) recruit host stromal cells, (c) regenerate endothelium and epithelium, (d) and secrete regenerative and immunomodulatory paracrine signals to control inflammation, ulceration, wound healing and fibrosis.

Citing Articles

Gastrointestinal Acute Radiation Syndrome: Mechanisms, Models, Markers, and Medical Countermeasures.

Winters T, Marzella L, Molinar-Inglis O, Price P, Han N, Cohen J Radiat Res. 2024; 201(6):628-646.

PMID: 38616048 PMC: 11658916. DOI: 10.1667/RADE-23-00196.1.


Extracellular Vesicles for the Treatment of Radiation Injuries.

Nanduri L, Duddempudi P, Yang W, Tamarat R, Guha C Front Pharmacol. 2021; 12:662437.

PMID: 34084138 PMC: 8167064. DOI: 10.3389/fphar.2021.662437.


Targets for protection and mitigation of radiation injury.

Khodamoradi E, Hoseini-Ghahfarokhi M, Amini P, Motevaseli E, Shabeeb D, Musa A Cell Mol Life Sci. 2020; 77(16):3129-3159.

PMID: 32072238 PMC: 11104832. DOI: 10.1007/s00018-020-03479-x.


Optimized Xenograft Protocol for Chronic Lymphocytic Leukemia Results in High Engraftment Efficiency for All CLL Subgroups.

Decker S, Zwick A, Saleem S, Kissel S, Rettig A, Aumann K Int J Mol Sci. 2019; 20(24).

PMID: 31842407 PMC: 6940872. DOI: 10.3390/ijms20246277.

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