AIM:To evaluate chronic ocular sequelae in patients with symblepharon caused by ocular burns and propose an objective grading system.METHODS:This was a retrospective,single-center clinical study.Patients with symbleph...AIM:To evaluate chronic ocular sequelae in patients with symblepharon caused by ocular burns and propose an objective grading system.METHODS:This was a retrospective,single-center clinical study.Patients with symblepharon caused by ocular burns at least six months later were assessed.Chronic ocular sequelae were classified into 3 categories(eyelid,conjunctiva,and cornea)and 9 chronic ocular sequelae[friction factors,exposure factors,conjunctival hyperemia,length of symblepharon,scope of adhesion,lacrimal area adhesion,loss of the palisades of Vogt(POV),corneal neovascularization,and corneal opacification].Each ocular sequela was graded from 0 to 3,depending on the increasing severity.The 9 ocular sequelae were evaluated to obtain the total severity score for each eye.The total severity score was defined as Grade I(1-9),Grade II(10-18),and Grade III(19-27).Moreover,the correlation between the severity of chronic ocular sequelae and visual acuity,surgical strategy,and the prognosis was analyzed,respectively.RESULTS:Cases of 79 eyes with symblepharon caused by ocular burns were included in this study.Of these,20(25.32%)were defined as Grade I,43(54.43%)as Grade II,and 16(20.25%)as Grade III.Eyes with a high total severity score had reduced visual acuity,required complicated surger y strategies,and poor prognosis(P<0.001).Multivariate regression analysis showed that the scope of adhesion,corneal opacification,and corneal neovascularization significantly affected visual acuity,surgical strategy,and prognosis(all P<0.001).CONCLUSION:The evaluation of chronic ocular sequelae enabled the development of an objective grading system for patients with symblepharon caused by ocular burns.This grading system can be applied to guide the treatment and predict the prognosis.展开更多
Metal–organic frameworks(MOFs)have attracted significant research interest in biomimetic catalysis.However,the modulation of the activity of MOFs by precisely tuning the coordination of metal nodes is still a signifi...Metal–organic frameworks(MOFs)have attracted significant research interest in biomimetic catalysis.However,the modulation of the activity of MOFs by precisely tuning the coordination of metal nodes is still a significant challenge.Inspired by metalloenzymes with well-defined coordination structures,a series of MOFs containing halogen-coordinated copper nodes(Cu-X MOFs,X=Cl,Br,I)are employed to elucidate their structure–activity relationship.Intriguingly,experimental and theoretical results strongly support that precisely tuning the coordination of halogen atoms directly regulates the enzyme-like activities of Cu-X MOFs by influencing the spatial configuration and electronic structure of the Cu active center.The optimal Cu–Cl MOF exhibits excellent superoxide dismutase-like activity with a specific activity one order of magnitude higher than the reported Cu-based nanozymes.More importantly,by performing enzyme-mimicking catalysis,the Cu–Cl MOF nanozyme can significantly scavenge reactive oxygen species and alleviate oxidative stress,thus effectively relieving ocular chemical burns.Mechanistically,the antioxidant and antiapoptotic properties of Cu–Cl MOF are achieved by regulating the NRF2 and JNK or P38 MAPK pathways.Our work provides a novel way to refine MOF nanozymes by directly engineering the coordination microenvironment and,more significantly,demonstrating their potential therapeutic effect in ophthalmic disease.展开更多
Purpose:To evaluate the clinical outcomes of tissue -engineered epithelium transplantation for severe ocular surface burns. Methods:This was a retrospective observational case series. From October 2005 to May 2011, 19...Purpose:To evaluate the clinical outcomes of tissue -engineered epithelium transplantation for severe ocular surface burns. Methods:This was a retrospective observational case series. From October 2005 to May 2011, 19 eyes of 19 patients with grade IV to VI ocular surface burns (Dua Classification) were treated by autologous transplantation of corneal stem cells cultivated on a fibrin gel membrane,with a mean follow-up of 16.2 months (range 12-36 months). Postoperative corneal surface stability, visual acuity (VA), corneal opacity, and neo- vascularization were evaluated. Results:No corneal perforations occurred and the entire corneal surface was free from epithelial defects in all eyes. At the final follow-up visit,VA in 17 eyes was improved after surgery,with 6 eyes achieving a VA of 20 / 100 or better. Corneal vascularization was significantly reduced in 17 (89.5% ).eyes.Corneal opacity was also improved in 12 (63.2%) eyes. All donor eyes remained healthy. Conclusion:Tissue-engineered epithelium transplantation can promote rapid reepithelialization of the ocular surface, inhibit corneal neovascularization,and improve vision for patients with severe ocular surface burns.(Eye Science 2013;.28:24- 29)展开更多
基金Supported by the National Natural Science Foundation of China(No.81770888)the Shanghai Municipal Education Commission Gaofeng Clinical Medicine Grant Support(No.20161421)+2 种基金the Shanghai Municipal Science and Technology Commission the Commercialization and Industrialization of Research Findings Project(No.17411963800)Shanghai Pujiang Program(No.18PJD025)Shanghai Jiao Tong University School of Medicine Two-hundred Talent(No.20191914)。
文摘AIM:To evaluate chronic ocular sequelae in patients with symblepharon caused by ocular burns and propose an objective grading system.METHODS:This was a retrospective,single-center clinical study.Patients with symblepharon caused by ocular burns at least six months later were assessed.Chronic ocular sequelae were classified into 3 categories(eyelid,conjunctiva,and cornea)and 9 chronic ocular sequelae[friction factors,exposure factors,conjunctival hyperemia,length of symblepharon,scope of adhesion,lacrimal area adhesion,loss of the palisades of Vogt(POV),corneal neovascularization,and corneal opacification].Each ocular sequela was graded from 0 to 3,depending on the increasing severity.The 9 ocular sequelae were evaluated to obtain the total severity score for each eye.The total severity score was defined as Grade I(1-9),Grade II(10-18),and Grade III(19-27).Moreover,the correlation between the severity of chronic ocular sequelae and visual acuity,surgical strategy,and the prognosis was analyzed,respectively.RESULTS:Cases of 79 eyes with symblepharon caused by ocular burns were included in this study.Of these,20(25.32%)were defined as Grade I,43(54.43%)as Grade II,and 16(20.25%)as Grade III.Eyes with a high total severity score had reduced visual acuity,required complicated surger y strategies,and poor prognosis(P<0.001).Multivariate regression analysis showed that the scope of adhesion,corneal opacification,and corneal neovascularization significantly affected visual acuity,surgical strategy,and prognosis(all P<0.001).CONCLUSION:The evaluation of chronic ocular sequelae enabled the development of an objective grading system for patients with symblepharon caused by ocular burns.This grading system can be applied to guide the treatment and predict the prognosis.
基金the National Key R&D Program of China(Grant No.2020YFA0908100)the National Nature Science Foundation(Grant Nos.12274356,82070931,and 82271045)+1 种基金Fundamental Research Funds for the Central Universities(20720220022)the 111 Project(B16029)。
文摘Metal–organic frameworks(MOFs)have attracted significant research interest in biomimetic catalysis.However,the modulation of the activity of MOFs by precisely tuning the coordination of metal nodes is still a significant challenge.Inspired by metalloenzymes with well-defined coordination structures,a series of MOFs containing halogen-coordinated copper nodes(Cu-X MOFs,X=Cl,Br,I)are employed to elucidate their structure–activity relationship.Intriguingly,experimental and theoretical results strongly support that precisely tuning the coordination of halogen atoms directly regulates the enzyme-like activities of Cu-X MOFs by influencing the spatial configuration and electronic structure of the Cu active center.The optimal Cu–Cl MOF exhibits excellent superoxide dismutase-like activity with a specific activity one order of magnitude higher than the reported Cu-based nanozymes.More importantly,by performing enzyme-mimicking catalysis,the Cu–Cl MOF nanozyme can significantly scavenge reactive oxygen species and alleviate oxidative stress,thus effectively relieving ocular chemical burns.Mechanistically,the antioxidant and antiapoptotic properties of Cu–Cl MOF are achieved by regulating the NRF2 and JNK or P38 MAPK pathways.Our work provides a novel way to refine MOF nanozymes by directly engineering the coordination microenvironment and,more significantly,demonstrating their potential therapeutic effect in ophthalmic disease.
文摘Purpose:To evaluate the clinical outcomes of tissue -engineered epithelium transplantation for severe ocular surface burns. Methods:This was a retrospective observational case series. From October 2005 to May 2011, 19 eyes of 19 patients with grade IV to VI ocular surface burns (Dua Classification) were treated by autologous transplantation of corneal stem cells cultivated on a fibrin gel membrane,with a mean follow-up of 16.2 months (range 12-36 months). Postoperative corneal surface stability, visual acuity (VA), corneal opacity, and neo- vascularization were evaluated. Results:No corneal perforations occurred and the entire corneal surface was free from epithelial defects in all eyes. At the final follow-up visit,VA in 17 eyes was improved after surgery,with 6 eyes achieving a VA of 20 / 100 or better. Corneal vascularization was significantly reduced in 17 (89.5% ).eyes.Corneal opacity was also improved in 12 (63.2%) eyes. All donor eyes remained healthy. Conclusion:Tissue-engineered epithelium transplantation can promote rapid reepithelialization of the ocular surface, inhibit corneal neovascularization,and improve vision for patients with severe ocular surface burns.(Eye Science 2013;.28:24- 29)
