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Biomimetic virus-based soft niche for ischemic diseases.
Kshitiz Raj Shrestha1, Do Hoon Lee2, Woojae Chung3
1BIO-IT Foundry Technology Institute, Pusan National University, Busan, 46241, Republic of Korea.
Biomaterials
|August 30, 2022
Summary
Engineered M13 phage nanofibers mimic the extracellular matrix to create soft tissue niches. This approach enhances stem cell therapy for ischemic diseases by promoting blood vessel regeneration and cell survival.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Soft tissue engineering requires biomimetic niches to support implanted cells.
- Extracellular matrix (ECM) cues are crucial for regulating cell behavior and tissue regeneration.
Purpose of the Study:
- To engineer de novo soft tissue niches using arginine-glycine-aspartic acid-engineered M13 phage nanofibers.
- To evaluate the efficacy of these biomimetic niches in supporting stem cell function and treating ischemic diseases.
Main Methods:
- Fabrication of nanofibrous M13 phage displaying RGD peptides for ECM mimicry.
- Utilized polyacrylamide (PA) hydrogels to mimic soft tissue stiffness (1-2 kPa).
- Implanted cells within engineered niches in an ischemic mouse model.
Main Results:
- Biochemical and topological cues from phage nanofibers enhanced stem cell response.
- Phage cues demonstrated angiogenic and antioxidant functions, improving cell survival in pathological environments.
- Reduced myogenic degeneration and fibrosis, while enhancing blood vessel regeneration and M2 macrophage polarization.
Conclusions:
- Biomimetic phage nanofiber cues effectively create therapeutic extracellular niches for cell therapy.
- This strategy shows significant potential for treating ischemic diseases by promoting tissue repair and regeneration.
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