title: Thermoresponsive poly(N-vinylcaprolactam) cryogels: synthesis and its biophysical evaluation for tissue engineering applications.
abstract: The thermoresponsive poly(N-vinylcaprolactam) (PVCl) based cryogel network were synthesized and characterized with respect to physical and biological properties. The PVCl cryogel crosslinked with polyethylene glycol-diacrylate (PEGda) was synthesized in 1% dimethyl sulfoxide containing aqueous medium at -12°C for 12-14 h. The cryogel synthesized in this manner were highly spongy in nature and can absorb water in its porous network. These polymeric cryogel networks have good physical morphology as confirmed by scanning electron microscopy. The estimated porosity of these cryogels was 90% as demonstrated by various methods based on absorption of water and cyclohexane. The median pore diameter and surface area was 30 μm and 2.0253 m(2)/g, respectively as confirmed by analysis on mercury porosimeter. These materials can interact with biological system without any cytotoxic effects. Change in temperature influenced the adsorption of fetal bovine serum (FBS) on PVCl scaffold which showed maximum protein adsorption at 37°C, as compared to that at 25°C. Furthermore, the fibroblast cell adhesion studies showed the potential of these PVCl based cryogels as tissue engineering scaffolds.
authors.affiliation: Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, 208016 Kanpur, India.
authors.forename: Akshay
authors.initials: A
authors.lastname: Srivastava
authors.forename: Ashok
authors.initials: A
authors.lastname: Kumar
mesh_terms: D000327:Adsorption; D000818:Animals; D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D055592:Biophysical Phenomena; D019556:COS Cells; D002209:Caprolactam / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D002417:Cattle; D049109:Cell Proliferation / Q000187:drug effects; D002522:Chlorocebus aethiops; D059985:Cryogels; D020100:Hydrogels / Q000009:adverse effects / Q000138:chemical synthesis* / Q000737:chemistry* / Q000378:metabolism; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000009:adverse effects / Q000737:chemistry* / Q000378:metabolism; D013696:Temperature; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry; D014867:Water / Q000378:metabolism / Q000494:pharmacology
chemical_list: D001672:Biocompatible Materials; D059985:Cryogels; D020100:Hydrogels; D011108:Polymers; D014867:Water; C086861:poly-N-vinylcaprolactam; D002209:Caprolactam