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Journal of Controlled Release 2014-Oct

Avidity-controlled hydrogels for injectable co-delivery of induced pluripotent stem cell-derived endothelial cells and growth factors.

केवल पंजीकृत उपयोगकर्ता ही लेखों का अनुवाद कर सकते हैं
साइन अप करने के लिए लॉग इन करें
लिंक क्लिपबोर्ड पर सहेजा गया है
Widya Mulyasasmita
Lei Cai
Ruby E Dewi
Arshi Jha
Sabrina D Ullmann
Richard H Luong
Ngan F Huang
Sarah C Heilshorn

कीवर्ड

सार

To translate recent advances in induced pluripotent stem cell biology to clinical regenerative medicine therapies, new strategies to control the co-delivery of cells and growth factors are needed. Building on our previous work designing Mixing-Induced Two-Component Hydrogels (MITCHs) from engineered proteins, here we develop protein-polyethylene glycol (PEG) hybrid hydrogels, MITCH-PEG, which form physical gels upon mixing for cell and growth factor co-delivery. MITCH-PEG is a mixture of C7, which is a linear, engineered protein containing seven repeats of the CC43 WW peptide domain (C), and 8-arm star-shaped PEG conjugated with either one or two repeats of a proline-rich peptide to each arm (P1 or P2, respectively). Both 20kDa and 40kDa star-shaped PEG variants were investigated, and all four PEG-peptide variants were able to undergo a sol-gel phase transition when mixed with the linear C7 protein at constant physiological conditions due to noncovalent hetero-dimerization between the C and P domains. Due to the dynamic nature of the C-P physical crosslinks, all four gels were observed to be reversibly shear-thinning and self-healing. The P2 variants exhibited higher storage moduli than the P1 variants, demonstrating the ability to tune the hydrogel bulk properties through a biomimetic peptide-avidity strategy. The 20kDa PEG variants exhibited slower release of encapsulated vascular endothelial growth factor (VEGF), due to a decrease in hydrogel mesh size relative to the 40kDa variants. Human induced pluripotent stem cell-derived endothelial cells (hiPSC-ECs) adopted a well-spread morphology within three-dimensional MITCH-PEG cultures, and MITCH-PEG provided significant protection from cell damage during ejection through a fine-gauge syringe needle. In a mouse hindlimb ischemia model of peripheral arterial disease, MITCH-PEG co-delivery of hiPSC-ECs and VEGF was found to reduce inflammation and promote muscle tissue regeneration compared to a saline control.

हमारे फेसबुक पेज से जुड़ें

विज्ञान द्वारा समर्थित सबसे पूर्ण औषधीय जड़ी बूटी डेटाबेस

  • 55 भाषाओं में काम करता है
  • विज्ञान द्वारा समर्थित हर्बल इलाज
  • छवि द्वारा जड़ी बूटी की मान्यता
  • इंटरएक्टिव जीपीएस नक्शा - स्थान पर टैग जड़ी बूटियों (जल्द ही आ रहा है)
  • अपनी खोज से संबंधित वैज्ञानिक प्रकाशन पढ़ें
  • उनके प्रभाव से औषधीय जड़ी बूटियों की खोज करें
  • अपने हितों को व्यवस्थित करें और समाचार अनुसंधान, नैदानिक परीक्षणों और पेटेंट के साथ अद्यतित रहें

एक लक्षण या बीमारी टाइप करें और जड़ी-बूटियों के बारे में पढ़ें जो मदद कर सकती हैं, एक जड़ी बूटी टाइप करें और बीमारियों और लक्षणों को देखें जिनके खिलाफ इसका उपयोग किया जाता है।
* सभी जानकारी प्रकाशित वैज्ञानिक शोध पर आधारित है

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