乳腺癌(Breast cancer, BC)于2020年在全球新增癌症病例成为了最常见癌症,且发病率逐年升高。胶原蛋白是构成细胞外基质(Extracellular Matrix, ECM)的主要成分,近年来的研究发现III型胶原蛋白(Collagen Type III, COLIII)在乳腺癌的发...乳腺癌(Breast cancer, BC)于2020年在全球新增癌症病例成为了最常见癌症,且发病率逐年升高。胶原蛋白是构成细胞外基质(Extracellular Matrix, ECM)的主要成分,近年来的研究发现III型胶原蛋白(Collagen Type III, COLIII)在乳腺癌的发生、发展过程中发挥重要作用,并对肿瘤微环境(Tumor micro-environment, TME)的维持有重要意义。其中,癌症相关成纤维细胞(Cancer-associated fibroblasts, CAFs)在建立和重塑ECM结构中扮演关键角色,调控肿瘤细胞通过TME入侵的进程。但由于该体系庞大,通过分泌细胞因子和趋化因子与癌细胞相互作用的机制复杂,各成分及其亚型在癌症进展中的角色尚存争议。本文基于TME在乳腺恶性肿瘤中的研究现状以及作为ECM中重要成分的COLIII的性质结构、形态分布,分析COLIII通过改变ECM的机械力与刚度影响乳腺癌行为的机制,同时充分讨论特殊结构、来源的COLIII在微环境中的不同功能及作用方式,评估其应用于癌症治疗的可能性。展开更多
Objective: To investigate the effect of surgical nursing on grade III Hand-Foot Syndrome (HFS) induced by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery. Method: From January 2019 to Decem...Objective: To investigate the effect of surgical nursing on grade III Hand-Foot Syndrome (HFS) induced by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery. Method: From January 2019 to December 2019, 10 patients with HFS grade III caused by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery in the Breast Department of Cancer Prevention and Treatment Center of Sun Yat-sen University were selected, and surgical nursing methods were used to intervene and observe the therapeutic effects of the patients. Results: One patient was cured within 7 days, the cure rate was 10% in 7 days, 8 patients were cured within 10 days, the cure rate was 80% in 10 days, 10 patients were cured within 15 days, the cure rate was 100% in 15 days. Conclusion: The surgical nursing method is effective for patients with grade III HFS caused by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery, shortening the treatment time of HFS, and is worthy of clinical promotion.展开更多
BACKGROUND Gustilo III fractures have a high incidence and are difficult to treat.Patients often experience difficulty in wound healing.Negative pressure drainage technology can help shorten wound healing time and has...BACKGROUND Gustilo III fractures have a high incidence and are difficult to treat.Patients often experience difficulty in wound healing.Negative pressure drainage technology can help shorten wound healing time and has positive value in improving patient prognosis.AIM To explore the clinical value of the negative pressure sealing drainage technique in wound healing of Gustilo IIIB and IIIC open fractures.METHODS Eighty patients with Gustilo IIIB and IIIC open fractures with skin and soft tissue injuries who were treated in the Second People’s Hospital of Dalian from March 2019 to December 2021 were selected as the research subjects.They were divided into a study group(n=40,healed with negative pressure closed drainage)and a control group(n=40,healed with conventional dressing changes)according to the variation in the healing they received.The efficacy of the clinical interventions,the variations in the regression indicators(time to wound healing,time to fracture healing,time to hospitalization),and the conversion and healing of bacterial wounds were compared 1-3 mo after the intervention.RESULTS The total effective rate of patients among the study group was 95.00%(38/40),which was notably higher than 75.00%(30/40)among the control group(P<0.05).The wound healing time,fracture healing time,and hospital stay of the patients in the study group was shorter than the control group(P<0.05).After the intervention,the negative bacterial culture at the wound site rate and wound healing rate of the patients among the study group increased compared to the control group(P<0.05).CONCLUSION Negative pressure sealing and drainage technology has a good therapeutic effect on patients with Gustilo IIIB and IIIC open fracture wounds with skin and soft tissue injury.It can notably enhance the wound healing rate and the negative rate of bacteria on the wound surface and help to speed up the recovery process of patients.展开更多
Mercury ion(Hg^(2+)),a highly noxious of heavy metalion,has detrimental effects on the ecological environment and human health.Herein,we have developed an exonuclease III(Exo III)assisted catalytic hairpin assembly fo...Mercury ion(Hg^(2+)),a highly noxious of heavy metalion,has detrimental effects on the ecological environment and human health.Herein,we have developed an exonuclease III(Exo III)assisted catalytic hairpin assembly formation of a trivalent G-quadruplex/hemin DNAzyme for colorimetric detection of Hg^(2+).A hairpin DNA(Hr)was designed with thymine-Hg^(2+)-thymine pairs that catalyzed by Exo III is prompted to happen upon binding Hg^(2+).A released DNA fragment triggers the catalytic assembly of other three hairpins(H1,H2,and H3)to form many trivalent G-quadruplex/hemin DNA enzymes for signal output.The developed sensor shows a dynamic range from 2 pM to 2μM,with an impressively low detection limit of 0.32 pM for Hg^(2+)detection.Such a sensor also has good selectivity toward Hg^(2+)detection in the presence of other common metal ions.This strategy shows the great potential for visual detection with portable type.展开更多
目的:研究分析中青年视网膜静脉阻塞(Retinal Vein Occlusion, RVO)患者同型半胱氨酸(Homocysteine, Hcy)及抗凝血酶III (Antithrombin III, AT-III)水平,两者是否作为致病危险因素参与RVO发病。分析视网膜中央静脉阻塞(CRVO)和视网膜...目的:研究分析中青年视网膜静脉阻塞(Retinal Vein Occlusion, RVO)患者同型半胱氨酸(Homocysteine, Hcy)及抗凝血酶III (Antithrombin III, AT-III)水平,两者是否作为致病危险因素参与RVO发病。分析视网膜中央静脉阻塞(CRVO)和视网膜分支静脉阻塞(BRVO)危险因素的差异,为治疗和预防该病提供客观依据。方法:1) 所有研究对象选自2021年10月至2023年12月期间就诊于内蒙古自治区人民医院眼科的年龄 P > 0.05)。三组患者之间在Hcy、AT-III、胆固醇(CHOL)、叶酸、维生素B12、D-二聚体(D-D)、纤维蛋白降解产物(FDP)水平差异均有统计学意义(P P P < 0.001)。结论:1) Hcy水平升高和AT-III活性缺乏为中青年CRVO和BRVO的危险因素。2) 相对于BRVO患者,CRVO组中Hcy水平升高和AT-III缺乏的值更为显著。展开更多
A chainlike coordination polymer [Gd（dca）3（phen）2（H2O）], （dca=dicyanamide, phen=1,10-phenanthroline） has been synthesized, and its crystal structure was characterized by X-ray single-crystal diffraction. The c...A chainlike coordination polymer [Gd（dca）3（phen）2（H2O）], （dca=dicyanamide, phen=1,10-phenanthroline） has been synthesized, and its crystal structure was characterized by X-ray single-crystal diffraction. The crystal belongs to monoclinic, space group P21/n with a=10.6581（13）, b=15.6129（16）, c=17.733（3）A°,β=90.499（5）°, V=2950.8（7）A°^3, Z= , C3oH18GdN13O, Mr=733.82, De= 1.652 g/cm^3, F（000）=1444, λ（MoKα）=0.71073A°,μ=2.297 mm^-1, R=0.0258 and wR=0.0616 for 4570 observed reflections （I〉 2σ（I））. In this complex, the gadolinium atom is nine-coordinated by four dca anions, two chelated phen ligands and one H2O molecule in a distorted tricapped trigonal prism. Two bridging dca anions connect the Gd（Ⅲ） ions yielding chainlike polymers that are linked by hydrogen bonds and π-π interactions to form a three-dimensional network.展开更多
The equilibrium and kinetics of sorption of gadolinium (III) ions from sulfate solutions by a natural clinoptilolite containing tuff are studied. It is shown that gadolinium is completely extracted from dilute solutio...The equilibrium and kinetics of sorption of gadolinium (III) ions from sulfate solutions by a natural clinoptilolite containing tuff are studied. It is shown that gadolinium is completely extracted from dilute solutions (0.002 M). The kinetic parameters of the sorption process are determined.展开更多
Mixed-oxide nanostructures of the type xGd<sub>2</sub>O<sub>3</sub>-(1-x)α-Fe<sub>2</sub>O<sub>3</sub> (x=0.1, 0.3, 0.5 and 0.7) were synthesized by mechanochemical act...Mixed-oxide nanostructures of the type xGd<sub>2</sub>O<sub>3</sub>-(1-x)α-Fe<sub>2</sub>O<sub>3</sub> (x=0.1, 0.3, 0.5 and 0.7) were synthesized by mechanochemical activation for ball milling times of 0, 2, 4, 8 and 12 hours. The systems were subsequently analyzed by Mӧssbauer spectroscopy, X-ray powder diffraction (XRPD), magnetic measurements and optical diffuse reflectance spectroscopy. The magnetic hyperfine field was studied as function of ball milling time for all sextets involved and found to be consistent with the formation of a limited solid solution in the systems investigated. The end-product was the gadolinium perovskite, represented by a doublet whose abundance was derived as function of the milling time. The XRPD patterns recorded for the equimolar composition were dominated by the diffraction peaks of GdFeO<sub>3</sub> after 12 hours of milling. The hysteresis loops were recorded at 300 and 5 K in an applied magnetic field of 5 T and were interpreted as a superposition of paramagnetic behavior of gadolinium oxide and weak ferromagnetic behavior of hematite and gadolinium perovskite. The Morin transition of hematite was inferred from zero-field-cooling-field-cooling (ZFC-FC) curves measured with a magnetic field of 200 Oe in the 5-300 K temperature range and was found to depend on the ball milling time. Optical diffuse reflectance spectra showed that the compounds were semiconductors with an optical band gap of 2.1 eV.展开更多
The latest regulatory framework,which has been introduced globally in the form of Basel III,and its implementation in the legislation of the member states of the Euro-pean Union has generated much interest in the impa...The latest regulatory framework,which has been introduced globally in the form of Basel III,and its implementation in the legislation of the member states of the Euro-pean Union has generated much interest in the impact of regulation on the efficiency and profitability of banks.This study aims to examine the impact of the introduction of two major regulatory changes(Basel II and Basel III)on bank performance,in terms of bank size and bank-specific and macroeconomic variables.A two-stage empirical anal-ysis was conducted on a sample of 433 European commercial banks over the 2006–2015 period.In the first stage,relative efficiency was calculated using non-parametric data envelopment analysis.In the second stage,the generalized method of moments was used to examine the impact of bank-specific and macroeconomic variables as well as regulation on bank performance,that is,profitability and efficiency.Consider-ing bank size,the results show a diverse impact of regulation on bank performance.Regarding large-and medium-sized banks,regulation positively affects both efficiency and profitability,whereas,for small banks,it negatively affects performance.The results suggest that larger banks have skillfully adapted to the new regulatory environment.In contrast,small banks have problems with profitability and efficiency because the new regulatory framework has imposed additional administrative and regulatory burdens.This could result in future failure or mergers with larger banks,resulting in a higher concentration in the banking sector and increased systemic risk.Our results strongly suggest that regulation should not be implemented equally for all banks;that is,on a one size fits all terms.A distinction between small and large banks when introducing new regulatory frameworks should be made if a reasonable level of competition is to be preserved.展开更多
文摘Objective: To investigate the effect of surgical nursing on grade III Hand-Foot Syndrome (HFS) induced by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery. Method: From January 2019 to December 2019, 10 patients with HFS grade III caused by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery in the Breast Department of Cancer Prevention and Treatment Center of Sun Yat-sen University were selected, and surgical nursing methods were used to intervene and observe the therapeutic effects of the patients. Results: One patient was cured within 7 days, the cure rate was 10% in 7 days, 8 patients were cured within 10 days, the cure rate was 80% in 10 days, 10 patients were cured within 15 days, the cure rate was 100% in 15 days. Conclusion: The surgical nursing method is effective for patients with grade III HFS caused by Doxorubicin hydrochloride liposome chemotherapy after breast cancer surgery, shortening the treatment time of HFS, and is worthy of clinical promotion.
基金the Review Committee of Fuzhou Medical College of Nanchang University(Approval No.4445644).
文摘BACKGROUND Gustilo III fractures have a high incidence and are difficult to treat.Patients often experience difficulty in wound healing.Negative pressure drainage technology can help shorten wound healing time and has positive value in improving patient prognosis.AIM To explore the clinical value of the negative pressure sealing drainage technique in wound healing of Gustilo IIIB and IIIC open fractures.METHODS Eighty patients with Gustilo IIIB and IIIC open fractures with skin and soft tissue injuries who were treated in the Second People’s Hospital of Dalian from March 2019 to December 2021 were selected as the research subjects.They were divided into a study group(n=40,healed with negative pressure closed drainage)and a control group(n=40,healed with conventional dressing changes)according to the variation in the healing they received.The efficacy of the clinical interventions,the variations in the regression indicators(time to wound healing,time to fracture healing,time to hospitalization),and the conversion and healing of bacterial wounds were compared 1-3 mo after the intervention.RESULTS The total effective rate of patients among the study group was 95.00%(38/40),which was notably higher than 75.00%(30/40)among the control group(P<0.05).The wound healing time,fracture healing time,and hospital stay of the patients in the study group was shorter than the control group(P<0.05).After the intervention,the negative bacterial culture at the wound site rate and wound healing rate of the patients among the study group increased compared to the control group(P<0.05).CONCLUSION Negative pressure sealing and drainage technology has a good therapeutic effect on patients with Gustilo IIIB and IIIC open fracture wounds with skin and soft tissue injury.It can notably enhance the wound healing rate and the negative rate of bacteria on the wound surface and help to speed up the recovery process of patients.
基金Supported by The Science and Technology Project of General Administration of Quality Supervision,Inspection and Quarantine (2015IK126)The Science and Technology Project of Changsha City of Hunan Province of China (KQ1602124).
文摘Mercury ion(Hg^(2+)),a highly noxious of heavy metalion,has detrimental effects on the ecological environment and human health.Herein,we have developed an exonuclease III(Exo III)assisted catalytic hairpin assembly formation of a trivalent G-quadruplex/hemin DNAzyme for colorimetric detection of Hg^(2+).A hairpin DNA(Hr)was designed with thymine-Hg^(2+)-thymine pairs that catalyzed by Exo III is prompted to happen upon binding Hg^(2+).A released DNA fragment triggers the catalytic assembly of other three hairpins(H1,H2,and H3)to form many trivalent G-quadruplex/hemin DNA enzymes for signal output.The developed sensor shows a dynamic range from 2 pM to 2μM,with an impressively low detection limit of 0.32 pM for Hg^(2+)detection.Such a sensor also has good selectivity toward Hg^(2+)detection in the presence of other common metal ions.This strategy shows the great potential for visual detection with portable type.
文摘目的:研究分析中青年视网膜静脉阻塞(Retinal Vein Occlusion, RVO)患者同型半胱氨酸(Homocysteine, Hcy)及抗凝血酶III (Antithrombin III, AT-III)水平,两者是否作为致病危险因素参与RVO发病。分析视网膜中央静脉阻塞(CRVO)和视网膜分支静脉阻塞(BRVO)危险因素的差异,为治疗和预防该病提供客观依据。方法:1) 所有研究对象选自2021年10月至2023年12月期间就诊于内蒙古自治区人民医院眼科的年龄 P > 0.05)。三组患者之间在Hcy、AT-III、胆固醇(CHOL)、叶酸、维生素B12、D-二聚体(D-D)、纤维蛋白降解产物(FDP)水平差异均有统计学意义(P P P < 0.001)。结论:1) Hcy水平升高和AT-III活性缺乏为中青年CRVO和BRVO的危险因素。2) 相对于BRVO患者,CRVO组中Hcy水平升高和AT-III缺乏的值更为显著。
基金Supported by the National Natural Science Foundation of China (20201008, 50272034)
文摘A chainlike coordination polymer [Gd（dca）3（phen）2（H2O）], （dca=dicyanamide, phen=1,10-phenanthroline） has been synthesized, and its crystal structure was characterized by X-ray single-crystal diffraction. The crystal belongs to monoclinic, space group P21/n with a=10.6581（13）, b=15.6129（16）, c=17.733（3）A°,β=90.499（5）°, V=2950.8（7）A°^3, Z= , C3oH18GdN13O, Mr=733.82, De= 1.652 g/cm^3, F（000）=1444, λ（MoKα）=0.71073A°,μ=2.297 mm^-1, R=0.0258 and wR=0.0616 for 4570 observed reflections （I〉 2σ（I））. In this complex, the gadolinium atom is nine-coordinated by four dca anions, two chelated phen ligands and one H2O molecule in a distorted tricapped trigonal prism. Two bridging dca anions connect the Gd（Ⅲ） ions yielding chainlike polymers that are linked by hydrogen bonds and π-π interactions to form a three-dimensional network.
文摘The equilibrium and kinetics of sorption of gadolinium (III) ions from sulfate solutions by a natural clinoptilolite containing tuff are studied. It is shown that gadolinium is completely extracted from dilute solutions (0.002 M). The kinetic parameters of the sorption process are determined.
文摘Mixed-oxide nanostructures of the type xGd<sub>2</sub>O<sub>3</sub>-(1-x)α-Fe<sub>2</sub>O<sub>3</sub> (x=0.1, 0.3, 0.5 and 0.7) were synthesized by mechanochemical activation for ball milling times of 0, 2, 4, 8 and 12 hours. The systems were subsequently analyzed by Mӧssbauer spectroscopy, X-ray powder diffraction (XRPD), magnetic measurements and optical diffuse reflectance spectroscopy. The magnetic hyperfine field was studied as function of ball milling time for all sextets involved and found to be consistent with the formation of a limited solid solution in the systems investigated. The end-product was the gadolinium perovskite, represented by a doublet whose abundance was derived as function of the milling time. The XRPD patterns recorded for the equimolar composition were dominated by the diffraction peaks of GdFeO<sub>3</sub> after 12 hours of milling. The hysteresis loops were recorded at 300 and 5 K in an applied magnetic field of 5 T and were interpreted as a superposition of paramagnetic behavior of gadolinium oxide and weak ferromagnetic behavior of hematite and gadolinium perovskite. The Morin transition of hematite was inferred from zero-field-cooling-field-cooling (ZFC-FC) curves measured with a magnetic field of 200 Oe in the 5-300 K temperature range and was found to depend on the ball milling time. Optical diffuse reflectance spectra showed that the compounds were semiconductors with an optical band gap of 2.1 eV.
基金supported by the University of Rijeka projects uniri-mladi-drustv-20-5.and uniri-drustv-18-228.
文摘The latest regulatory framework,which has been introduced globally in the form of Basel III,and its implementation in the legislation of the member states of the Euro-pean Union has generated much interest in the impact of regulation on the efficiency and profitability of banks.This study aims to examine the impact of the introduction of two major regulatory changes(Basel II and Basel III)on bank performance,in terms of bank size and bank-specific and macroeconomic variables.A two-stage empirical anal-ysis was conducted on a sample of 433 European commercial banks over the 2006–2015 period.In the first stage,relative efficiency was calculated using non-parametric data envelopment analysis.In the second stage,the generalized method of moments was used to examine the impact of bank-specific and macroeconomic variables as well as regulation on bank performance,that is,profitability and efficiency.Consider-ing bank size,the results show a diverse impact of regulation on bank performance.Regarding large-and medium-sized banks,regulation positively affects both efficiency and profitability,whereas,for small banks,it negatively affects performance.The results suggest that larger banks have skillfully adapted to the new regulatory environment.In contrast,small banks have problems with profitability and efficiency because the new regulatory framework has imposed additional administrative and regulatory burdens.This could result in future failure or mergers with larger banks,resulting in a higher concentration in the banking sector and increased systemic risk.Our results strongly suggest that regulation should not be implemented equally for all banks;that is,on a one size fits all terms.A distinction between small and large banks when introducing new regulatory frameworks should be made if a reasonable level of competition is to be preserved.
