MALDI ToF Investigation of the Reaction of Soy Protein Isolate with Glutaraldehyde for Wood Adhesives

Soy protein adhesives are currently a hot research topic in the wood panels industry for the abundant raw material reserves,reasonable price and outstanding environmental features.But their poor water resistance,low bonding strength and intolerance to mold are major drawbacks,so that proper modification before use is essential.Glutaraldehyde is one of the more apt cross-linking agents for soybean protein adhesives,which can effectively improve the bonding strength and water resistance of the adhesive.Equally,glutaraldehyde is also an efficient and broad-spectrum fungicide that can significantly improve the anti-fungal properties of a soy protein adhesive.In the work presented here,matrix assisted laser desorption ionization(MALDI-ToF)mass spectrometry and Fourier transform infrared spectroscopy techniques were used to analyze the reaction mechanism of glutaraldehyde cross-linking soybean protein.The results confirmed the reaction of the aldehyde group with amino groups of the side chains and the amide groups of the peptide linkages constituting the skeletal chain of the protein.The laboratory plywood and particleboard bonded with glutaraldehyde-soy bean protein adhesives were prepared to determine the adhesive bonding properties,the dry strength,24 h cold water soaking wet strength and 3 h hot water(63°C)wet strength of plywood were 2.03,1.13 and 0.75 MPa,respectively,which satisfied the requirements of industrial production.

Crosslinking Mechanism of Soy Protein-based Adhesives based on Glyoxal and a Compound of Protein Model

The crosslinking mechanism of glyoxal and asparagine was analyzed,and the relationship between the mechanism and practical performances of soy protein-based adhesives was also discussed.It is shown that when pH=1 and 3,glyoxal reacted with asparagine in the form of major cyclic ether compounds.When pH=5,glyoxal reacted with asparagine in two structural forms of sodium glycollate and cyclic ether compounds.However,amidogens of asparagine were easy to develop protonation under acid conditions.Supplemented by the instability of cyclic ether compounds,the reaction activity and reaction degree between glyoxal and asparagine were relatively small.Under alkaline conditions,glyoxal mainly reacted with asparagine in the form of sodium glycollate.With the increase of pH,the polycondensation was more sufficient and the produced polycondensation products were more stable.The reaction mechanism between glyoxal and asparagine had strong correspondence to the practical performances of the adhesives.Glyoxal solution could develop crosslinking reactions with soy protein under both acid and alkaline conditions.Bonding strength and water resistance of the prepared soy protein-based adhesives were increased significantly.When pH>7,glyoxal had relatively high reaction activity and reaction intensity with soy protein,and the prepared adhesives had high crosslinking density and cohesion strength,showing relatively high bonding strength,water resistance and thermal stability.

The Crosslinking Mechanism of Camellia Oleifera Protein Adhesive with Amine Resins by ^(13)C-NMR and ESI-MS

A new protein wood adhesive was studied with Camellia oleifera protein.Formaldehyde and N-(2)-L-Ala-L-Gln(LAG)were used as the model compounds of amino resins and Camellia oleifera protein,aiming to provide scientific foundations for the improvement and applications of Camellia oleifera protein adhesive by the reaction of model compounds.The experimental results demonstrate that,under alkaline conditions,formaldehyde is easier to react with Camellia oleifera protein by quicker reaction and lower curing temperature.Under acid conditions,amino hydroxymethylated structure of aliphatic series from LAG is difficult to form stable reactive intermediates and further polycondensation.Hydroxymethylation of end acylamino and peptide bond amino from LAG is relatively weak.Under alkaline conditions,the free aliphatic amino and acylamino of LAG both can make hydroxymethylation reaction with formaldehyde.In the polycondensation,hydroxymethyl amide is the initial structure and the reactive intermediate is produced by E1cb reaction of hydroxymethyl amide.Methylene bridge bonds and methylene ether bonds are structures of the polycondensation products,which are competing reactions.The former is mainly formed by the reaction between alkaline reactive intermediate and amino of aliphatic series,and the latter is produced by the reaction of reactive intermediate and amino of hydroxymethyl aliphatic series with hydroxymethyl amide.

Study on Camellia Oleifera Protein based Wood Adhesive by Epoxy Resin and Its Crosslinking Mechanism

Epoxy resin (EPR) was used to crosslink with Camellia oleifera Abel.protein to prepare wood adhesive,and the bonding performance and curing characteristics of which were mainly investigated,and the synthesis mechanism was also discussed by using model compounds.The experimental results show that EPR can significantly improve the bonding performance of Camellia oleifera Abel.protein-based adhesive,and the maximum of which reaches 0.72 MPa satisfies the strength requirement of Type II plywood in GB/T 17657-2013.After alkali treatment,the protein can more easily crosslink with EPR at low curing temperature,and the adhesive has high degree of crystallinity of curing products,high degree of crosslinking reaction,and high bonding strength.The reaction mechanism of EPR-modified Camellia oleifera Abel.protein adhesive can be divided into resinification phase and curing phase.

Transfer of the zp3a gene results in changes in egg adhesiveness and buoyancy in transgenic zebrafish

Reproductive strategies and spawning habits play key roles in the evolution of endemic East Asian cyprinids.However,the molecular mechanisms underlying the regulation of spawning habits are not well understood.We recently identified zona pellucida(Zp) as the top differentially expressed protein between East Asian cyprinids that produce adhesive and semi-buoyant eggs,suggesting that Zp protein may play important roles in the regulation of egg type.In this work,we generated transgenic zebrafish in which oocyte-specific expression of zp genes from rare minnow(Gobiocypris rarus),an East Asian cyprinid laying adhesive eggs,was driven by a zebrafish zp3.2 gene promoter.We found that the transgenic eggs obtained partial adhesiveness and exhibited alteration in hydration and buoyancy.Abnormal metabolism of vitellogenin(VTG) may contribute to enhanced hydration and/or buoyancy.Our work shows that expression of the exogenous zp3a gene from an adhesiveegg producing fish is sufficient to induce changes in both egg adhesiveness and buoyancy in zebrafish,emphasizing the important role of zp genes in the regulation of spawning habits.Our results thus provide new insights into how endemic East Asian cyprinids may have adapted to the Yangtze river-lake system via changes in spawning habits.

Soy Protein Isolate Non-Isocyanates Polyurethanes(NIPU)Wood Adhesives

Soy-protein isolate(SPI)was used to prepare non-isocyanate polyurethane(NIPU)thermosetting adhesives for wood panels by reacting it with dimethyl carbonate(DMC)and hexamethylene diamine.Both linear as well as branched oligomers were obtained and identified,indicating how such oligomer structures could further cross-link to form a hardened network.Unusual structures were observed,namely carbamic acid-derived urethane linkages coupled with lactam structures.The curing of the adhesive was followed by thermomechanical analysis(TMA).It appeared to follow a two stages process:First,at a lower temperature(maximum 130℃),the growth of linear oligomers occurred,finally forming a physically entangled network.This appeared to collapse and disentangle,causing a decrease of MOE,as the temperature increases.This appears to be due to the ever more marked Brownian movements of the linear oligomer chains with the increase of the temperature.Second,chemical cross-linking of the chains appeared to ensue,forming a hardened network.This was shown by the thermomechanical analysis(TMA)showing two distinct MOE maxima peaks,one around 130℃ and the other around 220℃,with a very marked MOE decrease between the two.Plywood panels were prepared and bonded with the SPI-NIPU wood adhesive and the results obtained are presented.The adhesive appeared to pass comfortably the requirements for dry strength of relevant standards,showing to be suitable for interior grade plywood panels.It did not pass the requirements for wet tests.However,addition of 15%of glycerol diglycidyl ether improved the wet tests results but still not enough to satisfy the standards requirements.

Analysis and Review of Downregulated Actin Cytoskeletal Proteins in Non-Small Cell Lung Cancer

Actin, a highly conserved protein, plays a dominant role in Non-small cell lung cancer (NSCLC). Late diagnosis and the aggressive nature of NSCLC pose a significant threat. Studying the clinic pathological properties of NSCLC proteins is a potential alternative for developing treatment strategies. Towards this, 35 downregulated actin cytoskeletal proteins on NSCLC prognosis and treatment were studied by examining their protein-protein interactions, gene ontology enrichment terms, and signaling pathways. Using PubMed, various proteins in NSCLC were identified. The protein-protein interactions and functional associations of these proteins were examined using the STRING database. The focal adhesion signaling pathway was selected from all available KEGG and Wiki pathways because of its role in regulating gene expression, facilitating cell movement and reproduction, and significantly impacting NSCLC. The protein-protein interaction network of the 35 downregulated actin cytoskeleton proteins revealed that ACTG1, ACTR2, ACTR3, ANXA2, ARPC4, FLNA, TLN1, CALD1, MYL6, MYH9, MYH10, TPM1, TPM3, TPM4, PFN1, IQGAP1, MSN, and ZXY exhibited the highest number of interactions. Whereas HSPB1, CTNNA1, KRT17, KRT7, FLNB, SEPT2, and TUBA1B displayed medium interactions, while UTRN, TUBA1B, and DUSP23 had relatively fewer interactions. It was discovered that focal adhesions are critical in connecting membrane receptors with the actin cytoskeleton. In addition, protein kinases, phosphatases, and adapter proteins were identified as key signaling molecules in this process, greatly influencing cell shape, motility, and gene expression. Our analysis shows that the focal adhesion pathway plays a crucial role in NSCLC and is essential for developing effective treatment strategies and improving patient outcomes.

An Eco-Friendly Wood Adhesive from Alfalfa Leaf Protein

According to the preparation method commonly used for soy proteinαbased adhesives,alfalfa leaf protein was used as the raw material to prepare alfalfa leaf protein-based wood adhesive.Differential scanning calorimetry analyzer(DSC),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTαIR)were used to characterize properties of the alfalfa leaf protein-based adhesive in this paper.The results revealed the following:(1)Chemical compositions and chemical structures of the alfalfa leaf protein were basically identical with those of the soy protein,both belonging to spherical proteins with the basis and potential for protein adhesives preparation,and spatial cross-linked network structures would be easily formed.(2)Alfalfa leaf protein and soy protein adhesives had the similar curing behaviors,curing temperature of alfalfa leaf protein-based adhesive was relaαtively lower,and the heating rate had minor influence on curing temperature of alfalfa leaf protein-based adhesive.At different heating rates,change tendencies of curing reaction degrees of both the two adhesives were not totally the same.(3)Activation energy and reaction frequency factor of the alfalfa leaf protein-based adhesive were higher than those of soy protein-based adhesive,indicating that the curing reaction of the alfalfa leaf protein adhesive was more difficult than soy protein-based adhesive,thus the dry shear strength and water resistance of alfalfa protein-based adhesive were lower than those of soy protein-based adhesive.Dynamics models of curing reactions of alfalfa leaf protein-based adhesive and soy protein-based adhesive are dα=dt/1.06×10^(13)e^(-97370/RT)(1-α)^(0.938) and dα/dt=1.09×10^(11)e^(-84260/RT) 1-α)^(0.928) respectively.The results of this study will expand the selection of raw materials for protein-based wood adhesives.

Research Progress of Soybean Protein Adhesive:A Review

Traditional formaldehyde-based adhesives rely excessively on petrochemical resources,release toxic gases,and pollute the environment.Plant-derived soybean protein adhesives are eco-friendly materials that have the potential to replace the formaldehyde-based adhesives used to fabricate wood-based panels.However,the poor water resistance,high brittleness,and poor mildew resistance of soybean protein adhesives limit their industrial applications.This article reviews recent research progress in the modification of soybean protein adhesives for improving the bonding performance of adhesives used for wood-based panel fabrication.Modification methods were summarized in terms of water resistance,solid content,and mildew resistance.The modification mechanisms and remaining problems were also discussed.Finally,the current industrial applications and the future research direction of soybean protein adhesives are discussed.

Growth-associated protein 43 and neural cell adhesion molecule expression following bone marrow-derived mesenchymal stem cell transplantation in a rat model of ischemic brain injury

BACKGROUND： Transplantation of bone marrow-derived mesenchymal stem cells （BMSCs） improves motor functional recovery, but the mechanisms remain unclear. OBJECTIVE： To investigate expression of growth-associated protein 43 （GAP-43） and neural cell adhesion molecule following BMSC transplantation to the lateral ventricle in rats with acute focal cerebral ischemic brain damage. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment using immunohistochemistry was performed at the laboratories of Department of Neurology, Renmin Hospital of Wuhan University and Doctoral Scientific Research Work Station of C-BONS PHARMA, Hubei Province, China, from January 2007 to December 2008. MATERIALS： Monoclonal mouse anti-rat 5-bromo-2-deoxyuridine and neural cell adhesion molecule antibodies were purchased from Sigma, USA; monoclonal mouse anti-rat GAP-43 antibody was purchased from Wuhan Boster, China. METHODS： Rat models of right middle cerebral artery occlusion were established using the thread method. At 1 day after middle cerebral artery occlusion, 20μL culture solution, containing 5×10^5 BMSCs, was transplanted to the left lateral ventricle using micro-injection. MAIN OUTCOME MEASURES： Scores of neurological impairment were measured to assess neural function. Expression of GAP-43 and neural cell adhesion molecule at the lesion areas was examined by immunohistochemistry. RESULTS： GAP-43 and neural cell adhesion molecule expression was low in brain tissues of the sham-operated group, but expression increased at the ischemic boundary （P 〈 0.05）. Transplantation of BMSCs further enhanced expression of GAP-43 and neural cell adhesion molecule （P 〈 0.05） and remarkably improved neurological impairment of ischemic rats （P 〈 0.05）. CONCLUSION： BMSC transplantation promoted neurological recovery in rats by upregulating expression of GAP-43 and neural cell adhesion molecule.

Challenges in diagnosing adhesive small bowel obstruction

Adhesive small bowel obstruction(ASBO)is the most frequently encountered surgical disorder of the small intestine.Up to 80%of ASBO cases resolve spontaneously and do not require invasive treatment.It is important to identify such patients that will benefit from conservative treatment in order to prevent unnecessarily exposing them to the risks associated with surgical intervention,such as morbidity and further adhesion formation.For the remaining ASBO patients,timely surgical intervention is necessary to prevent small bowel strangulation,which may cause intestinal ischemia and bowel necrosis.While early identification of these patients is key to decreasing ASBO-related morbidity and mortality,the non-specific signs and laboratory findings upon clinic presentation limit timely diagnosis and implementation of appropriate clinical management.Combining the clinical presentation findings with those from other diagnostic imaging modalities,such as abdominal X-ray,computed tomography-scan and water-soluble contrast studies,will improve diagnosis of ASBO and help clinicians to better evaluate the potential of conservative management as a safe strategy for a particular patient.Nonetheless,patients who present with moderate findings by all these approaches continue to represent a challenge.A new diagnostic strategy is urgently needed to further improve our ability to identify early signs of strangulated bowel,and this diagnostic modality should be able to indicate when surgical management is required.A number of potential serum markers have been proposed for this purpose,including intestinal fatty acid binding protein andα-glutathione S transferase.On-going research is attempting to clearly define their diagnostic utility and to optimize their potential role in determining which patients should be managed surgically.

Sustainable Raw Materials in Hot Melt Adhesives: A Review

Hot-melt (HM) adhesives offer advantages over their contemporary water-based and solvent-based adhesives like low volatile organic compounds (VOCs), 100% solid, fast drying, setting etc. In recent years, to reduce their dependence on dwindling petroleum resources and due to the enormous use of HM adhesives in packaging areas that demand 100% recyclability, efforts have been devoted to making these formulations completely bio-based, sustainable and biodegradable. In this attempt, research and developments have been focused on using starch, modified starch, soy protein, polylactides, polyamides, lignin and vegetable oils as a partial/fully replacement to the petrochemical-based polymers. The huge amount of research going on in the field of bio-based polymers has still not reached its complete potential in the field of HM adhesives. In this review paper, HM adhesives based on sustainable raw materials namely starch, modified starch, polyamides, poly (lactic acid), soy protein and lignin are discussed.

ADHESION-INDUCE PROTEIN TYROSINE PHOSPHORY-LATION IS ASSOCIATED WITH INVASIVE AND METASTATIC POTENTIALS IN B16-BL6 MELANOMA CELLS

Objective: The interaction of cancer cell with extracellular matrix (ECM) happens as an earlier and specific event in the invasive and metastatic cascade. To explore the key element(s) in cancer metastasis and observe the cellECM interaction and its role. Methods: To interrupt the cellECM interaction by suppression of adhesioninduced protein tyrosine phosphorylation with protein tyrosine kinase inhibitor genistein in B16B16 mouse melanoma cells. Results: When B16BL6 cells attached to Matrigel, a solubilized basement membrane preparation from EHS sarcoma, a 125 kDa protein increased its phosphotyrosine content dramatically. In contrast, when the cells were pretreated with 20μM or 30 μM genistein for 3 days, it was revealed a less increase in the phosphotyrosine content of this 125 kDa protein in response to cell attachment to ECM was revealed with immunoblot analysis. Accompanied by the lower level of adhesioninduced protein tyrosine phosphorylation the genisteintreated cells exhibited a decrease in their capabilities of adhesion to Matrigel and invasion through reconstituted basement membrane. The potentials of and forming lung metastatic nodules were also shown to be decreased dramatically in these genisteintreated cells. Conclusion: It was suggested that protein tyrosine phosphorylation in cellECM interaction might be associated with invasive and metastatic potentials in cancer cells.

Effect of Monocyte Chemotactic Protein-1 on the Intraperitoneal Adhesion Formation

In order to study the role of monocyte chemotactic protein-1 (MCP-1) in the intra-peri- toneal adhesion formation, 23 infertile patients undergoing laparoscopic operation were divided into two groups: experimental group including 12 patients with intra-peritoneal adhesion and control group including 11 patients without intra-peritoneal adhesion. Peritoneal fluid (PF) and peritoneum were collected from these patients during laparoscopic examination. The expression levels of MCP-1 protein and MCP-1 mRNA were detected by using enzyme-linked immunosorbent assay (ELISA) and dot blot analysis method respectively. It was found that the levels of MCP-l protein in PF of the patients with peritoneal adhesion were significantly higher than in the control group (0.44±0. 11 ng/ ml vs 0. 19±0.09 ng/ml respectively, P<0. 01). The level of MCP-l mRNA in the peritoneum of the patients with peritoneal adhesion was significantly higher than in the control group (48. 61±3. 72 vs 19.87±2.54 respectively, P<0. 01). It was suggested that MCP-1 might play a role in the adhe- sion formation, and chemotactic cytokines expressing in the peritoneal mesothelial cells might be take part in the process.

Monocyte chemotactic protein-1 and soluble adhesion molecules as possible prognostic markers of the efficacy of antiviral treatment in chronic hepatitis C

AIM: To explain the role of Monocyte chemotactic protein-1 (MCP-1) and soluble adhesion molecules in chronic hepatitis C during the treatment of interferon alpha (IFNα) 2 b and ribavirin (RBV).METHODS: Concentrations of MCP-1, soluble adhesion molecules intercellular adhesion molecule-1 (sICAM-1), sPselectin, interleukin (IL) 6, and ILl0 in serum were estimated in the group of 40 patients with chronic hepatitis C treated with IFNalpha2 b and RBV in 0, 16, 32, 48 wk of the therapy.RESULTS: In chronic hepatitis C, before and during the treatment, the serum levels of MCP-1 and sP-selectin in responders were similar to those of healthy subjects. In nonresponders (NR), MCP-1 increased in the course of IFN(α+RBV treatment, differences were statistically significant as compared to responders. MCP-1 correlated statistically with the activity of periportal inflammation (r= 0.35, P<0.05) but not with staging of liver fibrosis, sICAM-1 positively correlated with inflammatory activity and fibrosis in NR. sP-selectin did not correlate with histological findings in the liver. The MCP-1 correlated with the soluble form of sP-selectin concentrations (r= 6, P<0.001) and with IL-10 level in NR (r = 0.4, P<0.05). There was no correlation observed between the concentration of MCP-1 and sICAM-1, IL-6 during the treatment.CONCLUSION: MCP-1 concentration may be a prognostic marker of the efficacy of IFN+RBV therapy in patients with chronic hepatitis C.

Relationship of plasma homocysteine, soluble intercellular adhesion molecule-1, high mobility group box 1 protein with carotid intima-media thickness in elderly patients with type 2 diabetes mellitus

Objective:To explore the relationship of plasma homocysteine(Hcy),soluble intercellular adhesion molecule-1(sICAM-1)and high mobility group box 1 protein(HMGB1)with carotid intima-media thickness(c-IMT)in elderly patients with type 2 diabetes mellitus.Methods:A total of 100 elderly patients who were diagnosed as type 2 diabetes mellitus in Baogang Hospital of Inner Mongolia from June 2017 to May 2020 were chosen as research objects.According to c-IMT,they were divided into the normal group(n=35),the mild to moderate group(n=41)and the severe group(n=24).The expression levels of plasma Hcy,sICAM-1 and HMGB1 were compared between groups respectively.Pearson’s correlation coefficient was used to analyze the relationship of plasma Hcy,sICAM-1,HMGB1 with c-IMT.Results:The comparison in plasma Hcy,sICAM-1,HMGB1 and c-IMT among the three groups of patients was of statistical significance(p<.05).The results of correlation analysis showed that the expression levels of plasma Hcy,sICAM-1 and HMGB1 were positively correlated with c-IMT in elderly patients with type 2 diabetes mellitus(r=.627,.598,.614;p<.05).Conclusions:The expression levels of plasma Hcy,sICAM-1 and HMGB1 are abnormally increased in elderly patients with type 2 diabetes mellitus,and related to c-IMT,which can provide a strong evidence for clinical diagnosis and treatment by detecting their levels in clinical practice.

无机填料改性小麦蛋白/单宁复合胶粘剂的制备及性能研究

以小麦蛋白(WG)和缩合单宁(CTs)为原料,制备了无甲醛的生物基木材胶粘剂。利用蒙脱土、高岭土、重质碳酸钙、轻质碳酸钙和羟基磷灰石为填料进行改性,采用共混的方式制备填料改性复合胶粘剂。考察了无机填料种类对WG/CTs复合胶粘剂性能的影响,并进行耐水胶合强度、扫描电子显微镜(SEM)、热重分析仪、沸水煮不溶率、黏度等测试分析。研究结果表明:加入填料后,WG/CTs复合胶粘剂的黏度均有不同程度的增大,胶粘剂的热稳定性也比对照组胶粘剂有所提高;不同无机填料改性胶粘剂的耐水性存在显著差异,但胶合板的湿态强度均超过0.7 MPa,达到国家II类胶合板标准的要求;沸水煮不溶率测试结果显示,轻质碳酸钙改善了胶粘剂的耐水性;SEM图和胶层裂纹评估显示,重质碳酸钙、轻质碳酸钙与胶粘剂具有良好的相容性,表明碳酸钙填料对胶层的韧性没有影响,是较好的填料选择。

玉米蛋白水解物对幽门螺旋杆菌感染诱导小鼠胃损伤的拮抗作用

目的:研究玉米蛋白水解物对幽门螺旋杆菌感染诱导小鼠胃损伤的保护作用。方法:以健康的昆明雄性小鼠为研究对象,适应性喂养7 d后,随机分为正常组、模型组、CPN200组(200 mg/kg m_(b))、CPN400组(400 mg/kg m_(b))、CPN600组(600 mg/kg m_(b))和阳性对照组,通过灌胃幽门螺旋杆菌建立感染小鼠胃部模型,连续灌胃玉米蛋白水解物5周后,测定小鼠胃组织中抗氧化能力、炎症因子和核转录因子相关指标水平和小鼠胃组织形态学变化。结果:与模型组相比,玉米蛋白水解物干预可以显著提高机体抗氧化水平,超氧化物歧化酶、谷胱甘肽过氧化物酶水平显著提高(P<0.05),丙二醛水平显著降低(P<0.05)。小鼠胃组织中促炎因子和趋化因子肿瘤坏死因子-α、白细胞介素-1β、髓过氧化物酶、单核细胞趋化蛋白1、角质细胞趋化因子水平均显著降低(P<0.05)。与模型组相比,小鼠胃组织中核转录因子信号通路Toll样受体4、髓样分化因子88以及核转录因子κB(nuclear factor-κB,NF-κB)等关键代谢物水平均显著降低(P<0.05)。结论:玉米蛋白水解物可以显著升高机体抗氧化水平,减轻脂质过氧化程度,降低胃组织炎症反应和抑制NF-κB信号通路反应,从而起到对幽门螺旋杆菌感染诱导小鼠胃损伤的拮抗效果。

重组贻贝粘蛋白联合他克莫司软膏与抗组胺药治疗面部糖皮质激素依赖性 皮炎的疗效及对皮肤屏障指标的影响

目的:研究重组贻贝粘蛋白联合他克莫司软膏、抗组胺药治疗面部糖皮质激素依赖性皮炎(简称面部皮炎)及对皮肤屏障指标的影响。方法:选取2020年4月-2022年12月笔者医院门诊面部皮炎患者131例,采用随机数字表法分为对照组(n=65)与研究组(n=66)。两组均对面部皮炎进行常规处理,对照组给予他克莫司与氯雷他定治疗,研究组在对照组基础上联合重组贻贝粘蛋白治疗,持续治疗4周后,比较两组皮肤屏障指标(表皮皮脂含量、角质层含水量,经表皮水分丢失量)、自觉症状与客观体征积分、疗效、不良反应。结果:治疗后两组表皮皮脂含量、角质层含水量上升,经表皮水分丢失量下降,且研究组表皮皮脂含量、角质层含水量高于对照组,经表皮水分丢失量低于对照组(P<0.05)。治疗4周后两组自觉症状与客观体征积分下降,且研究组积分低于对照组(P<0.05)。研究组总有效率93.94%高于对照组81.54%(P<0.05)。两组总不良反应发生率比较,差异无统计学意义(P>0.05)。结论:重组贻贝粘蛋白联合他克莫司软膏、抗组胺药能有效改善面部皮炎患者临床症状,促进恢复皮肤屏障功能,且无明显严重不良反应发生。