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Potential of temperature-response collagen-genipin sols as a novel submucosal injection material for endoscopic resection

机译:温度反应性胶原-genipin溶胶作为新型粘膜下注射材料用于内镜切除的潜力

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摘要

>Background and study aims  We developed a novel submucosal (SM) injection material that contained pepsin-solubilized collagen (PSC), genipin (Ge) and phosphate buffer (PB). The aim of this study was to validate safety and usability of it for endoscopic resection (ER). >Materials and methods  In preliminary studies, 1) appropriate warming time and concentration of Ge, and concentration of NaCl in PB, 2) storage modulus of PSC, Ge, and PB mixture (PSC/Ge), and PSC as a mechanical property, 3) histological finding after injection, and histological toxicity of PSC/Ge was evaluated. We injected PSC/Ge, PSC, sodium hyaluronate (SH), dextrose (DW), and normal saline (NS) into SM of resected porcine stomach. We compared mean height of mucosal elevation after immediate injection (MH) and mean retaining rate at 60 minutes (MR) as ex vivo study. >Results  Optimal condition of PSC/Ge was Ge 5.5 mMol with 24 hours worming time and NaCl 280 mMol. PSC/Ge had better mechanical property than PSC. It was efficiently integrated and confined to the SM with acceptable toxicity. MH of PSC/Ge (5.1 ± 0.74 mm) and PSC (4.8 ± 0.84 mm) were significantly higher than NS (3.2 ± 0.84 mm). MR of PSC/Ge (100 ± 0.0%) was significantly higher than NS (61.7 ± 11.2%), DW (58.3 ± 11.8%) and SH (61.8 ± 8.6%). >Conclusion  PSC/Ge and PSC has potential to be safe and usable for ER. PSC/Ge was better than PSC because of better mechanical property than PSC.
机译:>背景和研究目的我们开发了一种新型的粘膜下(SM)注射材料,其中包含胃蛋白酶溶解的胶原蛋白(PSC),genipin(Ge)和磷酸盐缓冲液(PB)。这项研究的目的是验证其在内窥镜切除术(ER)中的安全性和可用性。 >材料和方法在初步研究中,1)适当的升温时间和Ge的浓度,以及PB中NaCl的浓度,2)PSC,Ge和PB混合物(PSC / Ge)的储能模量,以及以PSC作为机械性能,3)注射后的组织学发现,以及PSC / Ge的组织学毒性进行了评估。我们将PSC / Ge,PSC,透明质酸钠(SH),右旋糖(DW)和生理盐水(NS)注射到切除的猪胃的SM中。作为离体研究,我们比较了立即注射后(MH)的平均粘膜高度高度和60分钟(MR)的平均保留率。 >结果 PPSC / Ge的最佳条件是:Ge 5.5 mMol,浸透时间为24小时,NaCl 280 mMol。 PSC / Ge具有比PSC更好的机械性能。它被有效地整合并局限于具有可接受毒性的SM。 PSC / Ge(5.1±0.74 mm)和PSC(4.8±0.84 mm)的MH显着高于NS(3.2(±0.84 mm)。 PSC / Ge的MR(100%±0.0%)显着高于NS(61.7%±11.2%),DW(58.3%±11.8%)和SH(61.8%±8.6%)。 >结论 PSC / Ge和PSC具有对ER安全和可用的潜力。 PSC / Ge优于PSC,因为其机械性能优于PSC。

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