The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the pr...The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the prostate （TmLRP）. TmLRP and partial bladder neck mucosa were performed in 15 healthy adult male crossbred canines. Wound specimens were harvested at 3 days, and 1, 2, 3, and 4 weeks after operation, respectively. The histopathologic characteristics were observed by hematoxylin and eosin staining. The expression of cytokeratin 14 （CK14）, CK5, CK18, synaptophysin （Syn）, chromogranin A （CgA）, uroplakin, transforming growth factor-β1 （TGF-β1）, and TGF-β type Ⅱ receptor in prostatic urethra wound were examined by immunohistochemistry and real-time polymerase chain reaction, respectively. Van Gieson staining was performed to determine the expression of collagen fibers in prostatic urethra and bladder neck would. The results showed that the re-epithelialization of the prostatic urethra resulted from the mobilization of proliferating epithelial cells from residual prostate tissue under the wound. The proliferating cells expressed CK14, CK5, but not CK18, Syn, and CgA and re-epithelialize expressed uroplakin since 3 weeks. There were enhanced TGF-β1 and TGF-β type Ⅱ receptor expression in proliferating cells and regenerated cells, which correlated with specific phases of re-epithelialization. Compared with the re-epithelialization of the bladder neck, re-epithelialization of canine prostatic urethra was faster, and the expression of collagen fibers was relatively low. In conclusion, re-epithelialization in canine prostatic urethra resulted from prostate basal cells after TmLRP and this re-epithelialization way may represent the ideal healing method from anatomic repair to functional recovery after injury.展开更多
Background:Autologous platelet-rich plasma(PRP)has been suggested to be effective for wound healing.However,evidence for its use in patients with acute and chronic wounds remains insufficient.The aims of this study we...Background:Autologous platelet-rich plasma(PRP)has been suggested to be effective for wound healing.However,evidence for its use in patients with acute and chronic wounds remains insufficient.The aims of this study were to comprehensively examine the effectiveness,synergy and possible mechanism of PRP-mediated improvement of acute skin wound repair.Methods:Full-thickness wounds were made on the back of C57/BL6 mice.PRP or saline solution as a control was administered to the wound area.Wound healing rate,local inflammation,angiogenesis,re-epithelialization and collagen deposition were measured at days 3,5,7 and 14 after skin injury.The biological character of epidermal stem cells(ESCs),which reflect the potential for re-epithelialization,was further evaluated in vitro and in vivo.Results:PRP strongly improved skin wound healing,which was associated with regulation of local inflammation,enhancement of angiogenesis and re-epithelialization.PRP treatment significantly reduced the production of inflammatory cytokines interleukin-17A and interleukin-1β.An increase in the local vessel intensity and enhancement of re-epithelialization were also observed in animals with PRP administration and were associated with enhanced secretion of growth factors such as vascular endothelial growth factor and insulin-like growth factor-1.Moreover,PRP treatment ameliorated the survival and activated the migration and proliferation of primary cultured ESCs,and these effects were accompanied by the differentiation of ESCs into adult cells following the changes of CD49f and keratin 10 and keratin 14.Conclusion:PRP improved skin wound healing by modulating inflammation and increasing angiogenesis and re-epithelialization.However,the underlying regulatory mechanism needs to be investigated in the future.Our data provide a preliminary theoretical foundation for the clinical administration of PRP in wound healing and skin regeneration.展开更多
Background:Postradiation nasopharyngeal necrosis(PRNN)is a severe complication after radiotherapy in patients with nasopharyngeal carcinoma(NPC),which can severely affect the quality of life and threaten the patient’...Background:Postradiation nasopharyngeal necrosis(PRNN)is a severe complication after radiotherapy in patients with nasopharyngeal carcinoma(NPC),which can severely affect the quality of life and threaten the patient’s life.Only 13.4%-28.6%of patients can be cured by traditional repeated endoscopic debridement.Here,we introduced an innovative curative-intent endoscopic surgery for PRNN patients and evaluated its clinical efficacy.Methods:Clinical data of 72 PRNN patients who underwent radical endoscopic necrectomy,followed by reconstruc-tion using a posterior pedicle nasal septum and floor mucoperiosteum flap were analyzed to determine the efficacy of this surgery.The endpoints were complete re-epithelialization of the nasopharyngeal defect,relief of headache,and overall survival(OS).Results:All surgeries were successfully performed without any severe postoperative complications or death.The median value of numeric rating scales of pain decreased from 8 before surgery to 0 after surgery(P<0.001).Fifty-one patients(70.8%)achieved complete re-epithelialization of the nasopharyngeal defect.The number of cycles of radiotherapy(odds ratio[OR],7.254;95%confidence interval[CI]1.035-50.821;P=0.046),postoperative pathological result(OR,34.087;95%CI 3.168-366.746;P=0.004),and survival status of flap(OR,261.179;95%CI 17.176-3971.599;P<0.001)were independent risk factors of re-epithelialization of the nasopharyngeal defects.Postoperative patho-logical result(hazard ratio[HR],5.018;95%CI 1.970-12.782;P=0.001)was an independent prognostic factor for OS.The 2-year OS rate of the entire cohort was 77.9%.Conclusion:Curative-intent endoscopic necrectomy followed by construction using the posterior pedicle nasal septum and floor mucoperiosteum flap is a novel,safe,and effective treatment of PRNN in patients with NPC.展开更多
目的研究两性霉素B冲洗方法对难治性鼻窦炎(difficult-to-treat rhinosinusitis,DTRS)患者鼻内镜术后嗜酸性粒细胞(Eosinophils,Eos)及上皮化时间产生的影响。方法根据随机数字表法将2016年1月至2017年1月锦州市中心医院耳鼻咽喉头颈外...目的研究两性霉素B冲洗方法对难治性鼻窦炎(difficult-to-treat rhinosinusitis,DTRS)患者鼻内镜术后嗜酸性粒细胞(Eosinophils,Eos)及上皮化时间产生的影响。方法根据随机数字表法将2016年1月至2017年1月锦州市中心医院耳鼻咽喉头颈外科收治的86例接受鼻内镜手术治疗的DTRS病例分为2组,各43例,对照组术后予以常规治疗,研究组术后在常规治疗基础上使用两性霉素B冲洗,比较2组各时间段T淋巴细胞亚群(CD3^+、CD4^+、CD8^+及CD4^+/CD8^+)、Eos计数、炎性因子[白细胞介素2(IL-2)、白细胞介素4(IL-4)、白细胞介素5(IL-5)、血清干扰素γ(IFN-γ)]、上皮化时间、术后复发率、肿痛程度及疗效。结果研究组术后疗效总有效率为95.35%,显著高于对照组81.40%(P<0.05);研究组术后1月CD3^+、CD4^+、CD8^+与CD4^+/CD8^+值显著高于对照组(P<0.05),Eos计数、IL-2、IL-4、IL-5、IFN-γ水平显著低于对照组(P<0.05);研究组术后7 d VAS评分、重度肿胀率明显低于对照组(P<0.05);研究组上皮化时间明显短于对照组(P<0.05),复发率明显低于对照组(P<0.05)。结论在难治性鼻窦炎鼻内镜术后应用两性霉素B冲洗,可有效增强机体免疫功能,改善炎症,缓解肿痛程度,减少Eos,缩短上皮化时间,降低术后复发率。展开更多
The authors found experimentally that (1) fibronectin enhanced the healing of rabbit corneal epithelium after alkali burn and prevented the secondary breakdown; (2) it rapidly deposited on the denuded basement membran...The authors found experimentally that (1) fibronectin enhanced the healing of rabbit corneal epithelium after alkali burn and prevented the secondary breakdown; (2) it rapidly deposited on the denuded basement membrane to disappear as epithelial cells slided over, and (3) ultrastructurally, the neighbouring epithelial cells became flattened, with filopodia at the advancing edge, and extended to the wounded areas at 24 hours after the burn. However, the epithelial defects recurred 72 hours after the burn...展开更多
文摘The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the prostate （TmLRP）. TmLRP and partial bladder neck mucosa were performed in 15 healthy adult male crossbred canines. Wound specimens were harvested at 3 days, and 1, 2, 3, and 4 weeks after operation, respectively. The histopathologic characteristics were observed by hematoxylin and eosin staining. The expression of cytokeratin 14 （CK14）, CK5, CK18, synaptophysin （Syn）, chromogranin A （CgA）, uroplakin, transforming growth factor-β1 （TGF-β1）, and TGF-β type Ⅱ receptor in prostatic urethra wound were examined by immunohistochemistry and real-time polymerase chain reaction, respectively. Van Gieson staining was performed to determine the expression of collagen fibers in prostatic urethra and bladder neck would. The results showed that the re-epithelialization of the prostatic urethra resulted from the mobilization of proliferating epithelial cells from residual prostate tissue under the wound. The proliferating cells expressed CK14, CK5, but not CK18, Syn, and CgA and re-epithelialize expressed uroplakin since 3 weeks. There were enhanced TGF-β1 and TGF-β type Ⅱ receptor expression in proliferating cells and regenerated cells, which correlated with specific phases of re-epithelialization. Compared with the re-epithelialization of the bladder neck, re-epithelialization of canine prostatic urethra was faster, and the expression of collagen fibers was relatively low. In conclusion, re-epithelialization in canine prostatic urethra resulted from prostate basal cells after TmLRP and this re-epithelialization way may represent the ideal healing method from anatomic repair to functional recovery after injury.
基金supported by the National Key Research and Development Plan of China(No.2017YFC1103301)Military Medical Innovation Special Projects(No.18CXZ029)+2 种基金National Natural Science Foundation of China(31872742)Top-notch Talent Training Plan(SWH2018BJKJ-04)MilitaryMedical Science and Technology Youth Training Plan(20QNPY024).
文摘Background:Autologous platelet-rich plasma(PRP)has been suggested to be effective for wound healing.However,evidence for its use in patients with acute and chronic wounds remains insufficient.The aims of this study were to comprehensively examine the effectiveness,synergy and possible mechanism of PRP-mediated improvement of acute skin wound repair.Methods:Full-thickness wounds were made on the back of C57/BL6 mice.PRP or saline solution as a control was administered to the wound area.Wound healing rate,local inflammation,angiogenesis,re-epithelialization and collagen deposition were measured at days 3,5,7 and 14 after skin injury.The biological character of epidermal stem cells(ESCs),which reflect the potential for re-epithelialization,was further evaluated in vitro and in vivo.Results:PRP strongly improved skin wound healing,which was associated with regulation of local inflammation,enhancement of angiogenesis and re-epithelialization.PRP treatment significantly reduced the production of inflammatory cytokines interleukin-17A and interleukin-1β.An increase in the local vessel intensity and enhancement of re-epithelialization were also observed in animals with PRP administration and were associated with enhanced secretion of growth factors such as vascular endothelial growth factor and insulin-like growth factor-1.Moreover,PRP treatment ameliorated the survival and activated the migration and proliferation of primary cultured ESCs,and these effects were accompanied by the differentiation of ESCs into adult cells following the changes of CD49f and keratin 10 and keratin 14.Conclusion:PRP improved skin wound healing by modulating inflammation and increasing angiogenesis and re-epithelialization.However,the underlying regulatory mechanism needs to be investigated in the future.Our data provide a preliminary theoretical foundation for the clinical administration of PRP in wound healing and skin regeneration.
基金supported by the National Natural Science Foundation of China(Nos.81572912,81772895,and 81572848)Guangdong Public Welfare Research and Capacity Building Projects(2014B020212005)+5 种基金the Program of Sun Yat-Sen University for Clinical Research 5010 Program(No.201310 and No.2015011)the Major Project of Sun Yat-Sen University for the New Cross Subjectthe Special Support Program for High-level Talents in Sun Yat-Sen University Cancer Center(2015076316)the National Key Research and Development Program of China(2016YFC0905000)Guangdong Province Science and Technology Development Special Funds(Frontier and Key Technology Innovation Direction-Major Science and Technology Project,703040078088)Guangzhou Science and Technology Planning Project-Production and Research Collaborative Innovation Major Project(201604020182).
文摘Background:Postradiation nasopharyngeal necrosis(PRNN)is a severe complication after radiotherapy in patients with nasopharyngeal carcinoma(NPC),which can severely affect the quality of life and threaten the patient’s life.Only 13.4%-28.6%of patients can be cured by traditional repeated endoscopic debridement.Here,we introduced an innovative curative-intent endoscopic surgery for PRNN patients and evaluated its clinical efficacy.Methods:Clinical data of 72 PRNN patients who underwent radical endoscopic necrectomy,followed by reconstruc-tion using a posterior pedicle nasal septum and floor mucoperiosteum flap were analyzed to determine the efficacy of this surgery.The endpoints were complete re-epithelialization of the nasopharyngeal defect,relief of headache,and overall survival(OS).Results:All surgeries were successfully performed without any severe postoperative complications or death.The median value of numeric rating scales of pain decreased from 8 before surgery to 0 after surgery(P<0.001).Fifty-one patients(70.8%)achieved complete re-epithelialization of the nasopharyngeal defect.The number of cycles of radiotherapy(odds ratio[OR],7.254;95%confidence interval[CI]1.035-50.821;P=0.046),postoperative pathological result(OR,34.087;95%CI 3.168-366.746;P=0.004),and survival status of flap(OR,261.179;95%CI 17.176-3971.599;P<0.001)were independent risk factors of re-epithelialization of the nasopharyngeal defects.Postoperative patho-logical result(hazard ratio[HR],5.018;95%CI 1.970-12.782;P=0.001)was an independent prognostic factor for OS.The 2-year OS rate of the entire cohort was 77.9%.Conclusion:Curative-intent endoscopic necrectomy followed by construction using the posterior pedicle nasal septum and floor mucoperiosteum flap is a novel,safe,and effective treatment of PRNN in patients with NPC.
文摘目的研究两性霉素B冲洗方法对难治性鼻窦炎(difficult-to-treat rhinosinusitis,DTRS)患者鼻内镜术后嗜酸性粒细胞(Eosinophils,Eos)及上皮化时间产生的影响。方法根据随机数字表法将2016年1月至2017年1月锦州市中心医院耳鼻咽喉头颈外科收治的86例接受鼻内镜手术治疗的DTRS病例分为2组,各43例,对照组术后予以常规治疗,研究组术后在常规治疗基础上使用两性霉素B冲洗,比较2组各时间段T淋巴细胞亚群(CD3^+、CD4^+、CD8^+及CD4^+/CD8^+)、Eos计数、炎性因子[白细胞介素2(IL-2)、白细胞介素4(IL-4)、白细胞介素5(IL-5)、血清干扰素γ(IFN-γ)]、上皮化时间、术后复发率、肿痛程度及疗效。结果研究组术后疗效总有效率为95.35%,显著高于对照组81.40%(P<0.05);研究组术后1月CD3^+、CD4^+、CD8^+与CD4^+/CD8^+值显著高于对照组(P<0.05),Eos计数、IL-2、IL-4、IL-5、IFN-γ水平显著低于对照组(P<0.05);研究组术后7 d VAS评分、重度肿胀率明显低于对照组(P<0.05);研究组上皮化时间明显短于对照组(P<0.05),复发率明显低于对照组(P<0.05)。结论在难治性鼻窦炎鼻内镜术后应用两性霉素B冲洗,可有效增强机体免疫功能,改善炎症,缓解肿痛程度,减少Eos,缩短上皮化时间,降低术后复发率。
文摘The authors found experimentally that (1) fibronectin enhanced the healing of rabbit corneal epithelium after alkali burn and prevented the secondary breakdown; (2) it rapidly deposited on the denuded basement membrane to disappear as epithelial cells slided over, and (3) ultrastructurally, the neighbouring epithelial cells became flattened, with filopodia at the advancing edge, and extended to the wounded areas at 24 hours after the burn. However, the epithelial defects recurred 72 hours after the burn...
