LUO Yao-yao,LIAO Qian,WANG Ting,et al.Preparation of Periplaneta americana Thermosensitive Hydrogel and Investigation of Its Wound Healing Effect on Diabetic Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(14):164-172.
LUO Yao-yao,LIAO Qian,WANG Ting,et al.Preparation of Periplaneta americana Thermosensitive Hydrogel and Investigation of Its Wound Healing Effect on Diabetic Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(14):164-172. DOI: 10.13422/j.cnki.syfjx.20201059.
Preparation of Periplaneta americana Thermosensitive Hydrogel and Investigation of Its Wound Healing Effect on Diabetic Rats
H-NMR)和紫外分光光度法(UV)对该材料的化学组成、低临界相转变温度(LCST)进行表征;采用透析法制备美洲大蠊温敏凝胶,利用扫描电子显微镜、旋转流变仪和热重分析仪表征其断面结构、流变学性质和热稳定性;采用差示扫描量热法,X-射线衍射法和傅里叶红外光谱法共同鉴定P(NIPAM-co-AAc)-g-HA温敏材料对美洲大蠊提取物的包合作用,并考察美洲大蠊温敏凝胶促糖尿病大鼠创面修复的作用,采用Image-Pro Plus 6.0软件计算创面愈合率,运用苏木素-伊红(HE)和Masson染色观察各组大鼠创面组织病理学变化。
thermosensitive hydrogel and investigate its effect on wound healing in diabetic rats.
Method
2
Taking
N
-isopropylacrylamide (NIPAM) and acrylic acid (AAc) as monomers
thermosensitive poly(NIPAM-co-AAc) [P(NIPAM-co-AAc)] polymeric material was prepared by free radical polymerization
then thermoresponsive copolymer P(NIPAM-co-AAc)-g-HA was synthesized by conjugating P(NIPAM-co-AAc) to hyaluronic acid (HA). The structure and lower critical solution temperature (LCST) of the graft copolymer were characterized by proton nuclear magnetic resonance spectroscopy (
1
H-NMR) and ultraviolet spectrophotometry (UV).
P. americana
thermosensitive hydrogel was prepared by dialysis method
and it was characterized by scanning electron microscope (SEM)
rotation rheometer and thermogravimetric analyzer to observe section structure
rheological properties and thermal stability. Differential scanning calorimetry
X-ray diffraction and Fourier transform infrared spectroscopy were employed to identify the inclusion of P(NIPAM-co-AAc)-g-HA temperature sensitive material for
P. americana
extract
and to investigate the effect of
P. americana
thermosensitive hydrogel on wound healing in diabetic rats
and the rate of wound healing was calculated by Image-Pro Plus 6.0 software. Hematoxylin-eosin (HE) and Masson staining were used to observe the pathological changes of the wounds of rats in each group.
Result
2
P(NIPAM-co-AAc)-g-HA temperature sensitive material was successfully synthesized
its LCST was between 29 ℃ and 31 ℃
it had a dense and uniform porous structure and could uniformly include
P. americana
extract. Pharmacodynamic studies showed that
P. americana
thermosensitive hydrogel group had the best effect on promoting wound healing
its infiltration degree of inflammatory cells was significantly reduced
collagen and fibroblasts arranged neatly and compactly
and the density of neovascularization was significantly increased by comparing with the model group.
Conclusion
2
P. americana
thermosensitive hydrogel can effectively promote wound healing of diabetic rats and overcome the shortage of marketed
P. americana
liquid preparations
this paper can provide a reference for the development of
P. americana
extract preparations to promote wound healing in diabetic patients.
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