三维葡萄糖电化学传感器与胶原水凝胶集成实时监测细胞代谢

葡萄糖代谢的实时监测不仅能够提供细胞生长状态信息,还有助于深入理解细胞代谢机制。电化学传感器已成为葡萄糖实时动态测量的重要方法之一,然而,目前报道的葡萄糖传感器大多基于二维电极,很难与三维细胞培养体系良好兼容并进行准确检测。通过在对H2O2还原具有催化作用的多孔电极表面固定葡萄糖氧化酶(GOD),制备了一种灵敏度高、选择性好的三维葡萄糖电化学传感器。然后,将包裹了肿瘤细胞(MCF-7)的胶原水凝胶填充到三维传感器孔隙,构建了兼具细胞三维培养和电化学检测于一体的集成平台。通过实时监测MCF-7细胞培养环境中葡萄糖的浓度变化,实现了肿瘤细胞在抗癌药物作用下葡萄糖代谢能力的实时分析,为细胞能量代谢行为研究提供了一种新的评估方法。

Evaluating the use of three-dimensional reconstruction visualization technology for precise laparoscopic resection in gastroesophageal junction cancer

BACKGROUND Laparoscopic gastrectomy for esophagogastric junction(EGJ)carcinoma enables the removal of the carcinoma at the junction between the stomach and esophagus while preserving the gastric function,thereby providing patients with better treatment outcomes and quality of life.Nonetheless,this surgical technique also presents some challenges and limitations.Therefore,three-dimensional reconstruction visualization technology(3D RVT)has been introduced into the procedure,providing doctors with more comprehensive and intuitive anatomical information that helps with surgical planning,navigation,and outcome evaluation.AIM To discuss the application and advantages of 3D RVT in precise laparoscopic resection of EGJ carcinomas.METHODS Data were obtained from the electronic or paper-based medical records at The First Affiliated Hospital of Hebei North University from January 2020 to June 2022.A total of 120 patients diagnosed with EGJ carcinoma were included in the study.Of these,68 underwent laparoscopic resection after computed tomography(CT)-enhanced scanning and were categorized into the 2D group,whereas 52 underwent laparoscopic resection after CT-enhanced scanning and 3D RVT and were categorized into the 3D group.This study had two outcome measures:the deviation between tumor-related factors(such as maximum tumor diameter and infiltration length)in 3D RVT and clinical reality,and surgical outcome indicators(such as operative time,intraoperative blood loss,number of lymph node dissections,R0 resection rate,postoperative hospital stay,postoperative gas discharge time,drainage tube removal time,and related complications)between the 2D and 3D groups.RESULTS Among patients included in the 3D group,27 had a maximum tumor diameter of less than 3 cm,whereas 25 had a diameter of 3 cm or more.In actual surgical observations,24 had a diameter of less than 3 cm,whereas 28 had a diameter of 3 cm or more.The findings were consistent between the two methods(χ^(2)=0.346,P=0.556),with a kappa consistency coefficient of 0.808.With respect to infiltration length,in the 3D group,23 patients had a length of less than 5 cm,whereas 29 had a length of 5 cm or more.In actual surgical observations,20 cases had a length of less than 5 cm,whereas 32 had a length of 5 cm or more.The findings were consistent between the two methods(χ^(2)=0.357,P=0.550),with a kappa consistency coefficient of 0.486.Pearson correlation analysis showed that the maximum tumor diameter and infiltration length measured using 3D RVT were positively correlated with clinical observations during surgery(r=0.814 and 0.490,both P<0.05).The 3D group had a shorter operative time(157.02±8.38 vs 183.16±23.87),less intraoperative blood loss(83.65±14.22 vs 110.94±22.05),and higher number of lymph node dissections(28.98±2.82 vs 23.56±2.77)and R0 resection rate(80.77%vs 61.64%)than the 2D group.Furthermore,the 3D group had shorter hospital stay[8(8,9)vs 13(14,16)],time to gas passage[3(3,4)vs 4(5,5)],and drainage tube removal time[4(4,5)vs 6(6,7)]than the 2D group.The complication rate was lower in the 3D group(11.54%)than in the 2D group(26.47%)(χ^(2)=4.106,P<0.05).CONCLUSION Using 3D RVT,doctors can gain a more comprehensive and intuitive understanding of the anatomy and related lesions of EGJ carcinomas,thus enabling more accurate surgical planning.

二甲双胍对2型糖尿病大鼠视网膜的保护及其对血清胱抑素C的调节作用

目的:在大鼠2型糖尿病(T2DM)造模的基础上继续制备糖尿病视网膜病变(DR)模型,观察二甲双胍对T2DM大鼠DR的预防及保护作用和对血清胱抑素C(Cys C)的影响,并对其机制进行探讨。方法:筛选120只雄性SD大鼠,随机取30只分为空白对照组A(10只),T2DM组(10只)和二甲双胍干预组A(10只);其余90只随机分为三组,分别为空白对照组B(30只),DR组(30只)和二甲双胍干预组B(30只)。除空白对照组A、B外,其余所有组大鼠均构建T2DM模型,成模后二甲双胍干预组A大鼠给予二甲双胍灌胃,空白对照组A和T2DM组大鼠均给予生理盐水灌胃,干预3mo后分别测量三组大鼠的空腹血糖(FBG)和空腹血清胰岛素(FINS)指标,计算并分析胰岛素抵抗指数(HOMA-IR);测各组大鼠血清Cys C、肿瘤坏死因子-α(TNF-α)、白细胞介素-8(IL-8)、血管内皮生长因子(VEGF)和活性氧(ROS)水平,并行FFA、HE染色及透射电镜观察大鼠视网膜组织及血管形态;在T2DM病程3mo后,二甲双胍干预组B大鼠开始给予二甲双胍灌胃,其余大鼠均给予生理盐水灌胃,按干预时长不同,分别于第4、5、6mo各组取10只大鼠进行观察,测各组大鼠血清Cys C、TNF-α、IL-8、VEGF和ROS水平,并行FFA、HE染色及透射电镜观察大鼠视网膜组织及血管形态。结果:空白对照组A、T2DM组和二甲双胍干预组A三组间大鼠血清FBG、FINS、HOMA-IR、Cys C、TNF-α、IL-8、VEGF和ROS的表达均有差异(P<0.05),且均为T2DM组最高,二甲双胍干预组A低于T2DM组;空白对照组B、DR组和二甲双胍干预组B分别在4、5、6mo各同龄组中,三组间大鼠血清Cys C、TNF-α、IL-8、VEGF和ROS的表达均有差异(P<0.05),且均为DR组最高,二甲双胍干预组B的表达低于DR组,随着DR病程的延长,Cys C、TNF-α、IL-8、VEGF和ROS的表达也进一步增加;FFA结果显示:与对应的空白对照组相比,各模型组大鼠视网膜血管走行迂曲,并且随着病程的延长可见微动脉瘤及荧光渗漏;HE染色结果显示:与对应的空白对照组相比,各模型组大鼠视网膜细胞排列紊乱,并随着病程的延长可见异常扩张的血管;透射电镜结果显示:与对应的空白对照组相比,各模型组大鼠视网膜毛细血管损伤严重;但与对应模型组比较,各二甲双胍干预组大鼠FFA、HE和透射电镜结果均有不同程度的改善。结论:二甲双胍可通过下调血清Cys C介导的炎症和氧化应激水平,改善视网膜组织病变,从而对T2DM大鼠视网膜病变起预防和治疗作用。

Effect of transcutaneous electrical acupoint stimulation combined with palonosetron on chemotherapy-induced nausea and vomiting: a single.blind,randomized, controlled trial

Background: Chemotherapy?induced nausea and vomiting adversely affects the quality of life of patients who receive chemotherapy via intravenous infusion or transcatheter arterial chemoembolization(TACE). This study aimed to investigate the clinical effects of transcutaneous electrical acupoint stimulation(TEAS) on nausea and vomiting after TACE.Methods: A total of 142 patients who received TACE with cisplatin for primary or metastatic liver cancer were assigned to the active?acupuncture(n = 72) or placebo?acupuncture(n Hegu(LI4), Neiguan(P6), an= 70) groups using a covariate?adaptive randomization at a ratio of 1:1. The acupointsd Zusanli(ST36) were stimulated twice daily for 6 days. The effects of TEAS on nausea and vomiting were assessed by using occurrence rate and severity of these symptoms. Anorexia scale and M. D. Anderson Symptom Inventory(MDASI) scores were secondary endpoints and were used to assess the effect of TEAS on patient appetite and quality of life. The safety of the treatments was also monitored.Results: Between the two groups, the differences in occurrence rates and severities of nausea and vomiting after TACE were not significant(all P > 0.05). From the second day after TACE, anorexia scores were significantly lower in the active?acupuncture group than in the placebo?acupuncture group and continued to decrease over time with treat?ment(all P values less than 0.01). On days 0, 1, and 2, the mean MDASI scores for the active?acupuncture group were slightly lower than those for the placebo?acupuncture group, but the differences were not statistically significant(all P > 0.05). No significant differences were found between the two groups in the occurrence rate of any adverse event(P > 0.05).Conclusion: TEAS appears to be a safe and effective therapy to relieve patients' gastrointestinal discomfort after chemotherapy.

Research of expression quantity of serum miR-146a and miR-146b in patients with acute cerebral infarction before and after the intervention of rosuvastatin

Objective: To study the expression quantity of serum miR-146a and miR-146b in patients with acute cerebral infarction before and after the intervention of rosuvastatin and its correlation with toll-like receptor 2 (TLR2) and TLR4 signaling pathways. Methods:A total of 65 patients with acute cerebral infarction treated in our hospital from December 2015 to August 2016 were selected for prospective study. They were treated with lipid-lowering rosuvastatin, and peripheral blood samples were collected at 8th week before and after treatment, respectively. Serum was separated and expression quantity of miR-146a and miR-146b and contents of TNF-α, interleukin (IL)-1β, IL-6 and IL-17 were determined. Peripheral blood mononuclear cells were isolated and fluorescence intensities of TLR2, TLR4, myeloid differentiation primary response gene 88 (MyD88), interleukin-1 receptor-associated kinase 1 (IRAK-1) and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) were measured. Results:At 8th week of intervention of rosuvastatin, expression quantity of serum miR-146a [(0.762 ± 0.092)vs. (0.346 ± 0.053)] and miR-146b [(0.714 ± 0.088)vs. (0.317 ± 0.047)] in patients with acute cerebral infarction was significantly higher than those before the intervention. Fluorescence intensities of peripheral blood mononuclear cells such as TLR2 [(10.34 ± 1.27)vs. (16.94 ± 1.94)], TLR4 [(11.37 ± 1.54)vs. (24.35 ± 3.26)], IRAK [(9.34 ± 0.92)vs. (15.32 ± 1.82)], MyD88 [(4.42 ± 0.56) vs. (9.41 ± 1.03)] and NF-kB [(6.65 ± 0.78) vs. (13.49 ± 1.76)] and contents of inflammatory factors such as TNF-α [(64.26 ± 8.29) μg/L vs. (106.39 ± 13.84) μg/L], IL-1β [(37.91 ± 5.24) μg/Lvs. (64.23 ± 8.33) μg/L], IL-6 [(34.28 ± 4.85) ng/Lvs. (82.46 ± 11.97) ng/L] and IL-17 [(56.75 ± 7.49) ng/Lvs. (98.31 ± 11.36) ng/L] of serum were all significantly lower than those before the intervention. Expression quantity of serum miR-146a and miR-146b had a negative correlation with fluorescence intensities of TLR2, TLR4, IRAK, MyD88 and NF-kB. Fluorescence intensities of TLR2 and TLR4 in peripheral blood mononuclear cells had a positive correlation with contents of TNF-α, IL-1β, IL-6 and IL-17 in serum. Conclusions: Treatment with rosuvastatin can up-regulate the expression quantity of serum miR-146a and miR-146b in patients with acute cerebral infarction and further inhibit the secretion of IRAK, MyD88, NF-kB, TNF-α, IL-1β, IL-6 and IL-17 mediated by TLR2 and TLR4.

Ferruginol alleviates inflammation in dextran sulfate sodium-induced colitis in mice through inhibiting COX-2, MMP-9 and NF-κB signaling

Objective:To assess the anti-inflammatory efficacy of ferruginol on dextran sulfate sodium(DSS)stimulated ulcerative colitis mice.Methods:Ulcerative colitis was induced in C57 BL/6 J mice by administering 2%of DSS through drinking water for 7 d.The mice in the treatment group were treated with DAA+50 mg/kg/day ferruginol orally.In the positive control group,sulfasalazine(50 mg/kg/day)was used alongside with DSS.After induction,the bodyweight,character of stool and feces occult blood were recorded daily,the disease activity index was calculated,and the colon length,colon weight,and spleen weight were recorded.The myeloperoxidase activity was assayed by spectrophotometry.Interleukin(IL)-6,IL-1β,and tumor necrosis factor-αwere determined by ELISA method,and nuclear factor-κB,cyclooxygenase-2,matrix metalloproteinases-9,and inducible nitric oxide synthase by Western blotting assays.Results:Ferruginol significantly increased the bodyweight,colon weight,colon length,and decreased disease activity index and spleen weight.It exhibited anti-inflammatory activity against DSS induced ulcerative colitis in mice by reducing the activities of myeloperoxidase,tumor necrosis factor-α,nuclear factor-κB,IL-1β,cyclooxygenase-2,matrix metalloproteinases-9,IL-6,and inducible nitric oxide synthase.Conclusions:Ferruginol could be used to treat ulcerative colitis by attenuating the inflammation in colon cells and maintaining colonic mucosal barrier integrity.

Concurrent alcoholic cirrhosis and malignant peritoneal mesothelioma in a patient:A case report

BACKGROUND Malignant peritoneal mesothelioma(MPM)originates from the mesothelial and subcutaneous cells of the abdominal cavity.Its diagnose is difficult due to its nonspecific and vague symptoms,and it should be differentiated from alcoholic cirrhosis and liver and pancreatic cancers.Misdiagnosis and missed diagnosis can easily occur when MPM presents with other diseases.To the best of our knowledge,no case of MPM concurrent with alcoholic cirrhosis has been reported.CASE SUMMARY A 63-year-old man presented to our hospital with abdominal distension for 20days.He had a history of alcohol consumption for nearly 30 years and no history of special drug use or toxic exposure.After treatment for alcoholic cirrhosis in a community hospital,his symptoms did not improve significantly.The patient underwent exploratory laparotomy and surgical resection.Pathologic examination showed an epithelioid MPM.He was treated with chemotherapy and intraperitoneal hyperthermic perfusion after surgery.Currently,he is in a stable condition and tumor recurrence has not occurred.CONCLUSION Misdiagnosis and missed diagnosis of MPM can easily occur because of its insidious onset.Therefore,there is a need to understand.MPM in clinical practice,make the correct diagnosis,and provide timely and effective treatment.

赖氨酰氧化酶在眼部疾病的研究进展

赖氨酰氧化酶(LOX)是细胞外具有铜结合部位的氨基氧化酶,大量研究已经证实LOX可能参与许多疾病的病理发生过程。目前LOX导致疾病发展的常见变异的潜在机制仍然未知,但潜在的作用可能在于通过组织特异性的可变剪接或表达调控来影响LOX的生物学活性。但无论是在正常或病理情况下,关于眼组织中LOX的信息很少。近年有相关研究发现LOX可能参与许多眼部疾病的发生和发展,现就以近年来LOX参与的眼部疾病的研究进展做一综述。

Shear-horizontal transverse-electric seismoelectric waves in cylindrical double layer porous media

The shear-horizontal(SH) waves excited by the shear source in a borehole are easy to analyze due to the simple waveform. The borehole-side structures make the formation properties discontinuous. We consider a cylindrical double layer structure and study the borehole shear-horizontal and transverse-electric(SH-TE) seismoelectric waves. We first derive the expressions of the basic field quantities, and simulate the acoustic field and electric field using the real axis integral method. Compared with the wave fields of an infinitely homogeneous porous medium outside the borehole, the cylindrical layered structure makes the multi-mode cylindrical Love waves and their accompanying electric fields excited.Next, in order to study the interface response law of the inducing electric fields, we use the secant integral method to calculate the interface converted electromagnetic waves and analyze the causes of each component. It is found that an interface response occurs each time the SH wave impinges the interface in the layered porous medium. The results show that the SH-TE mode has a potential application for borehole-side interface detection in geophysical logs.

Autoimmune encephalitis with posterior reversible encephalopathy syndrome:A case report

BACKGROUND Posterior reversible encephalopathy syndrome(PRES)is a neuroimaging-based syndrome and is associated with multifocal vasogenic cerebral edema.Patients with PRES frequently demonstrate headache,seizure,encephalopathy,altered mental function,visual loss and so on.We here report a patient who showed persistent neurologic deficits after PRES and was ultimately diagnosed with autoimmune encephalitis(AE).CASE SUMMARY This case exhibits a rare imaging manifestation of anti-casper 2 encephalitis which was initially well-matched with PRES and associated vasogenic edema.CONCLUSION AE should be further considered when the etiology,clinical manifestations,and course of PRES are atypical.

An improved simple model for α decay half-lives

In this paper,using theαparticle preformation probabilities Pαfrom Xu et al.[Xu and Ren,Nucl.Phys.A 760,303(2005)],which were extracted by fitting experimental half-lives ofαdecay,based on a phenomenological harmonic oscillator potential model(HOPM)[Bayrak,J Phys G 47,025102(2020)],refitting 178αdecay half-lives of even-even nuclei obtained from the latest nuclear property table NUBASE2020,we obtain the only one adjustable parameter V0-162.6 MeV in the HOPM,i.e.,the depth of nuclear potential.The corresponding root-mean-square(rms)deviation isσ-0.322.Furthermore,to consider the contribution of centrifugal potential to unfavoredαdecay half-lives,adding a new term■(d and l are the adjustable parameter and orbital angular momentum carried away by emittedαparticle)to the logarithmic form of favoredαdecay half-lives under the HOPM framework,we propose an improved simple model(ISM)for calculating favored and unfavoredαdecay half-lives.Fitting the experimental half-lives of 205 unfavoredαdecay,we obtain d-0.381.The ISM is used to calculate the unfavoredαdecay half-lives of 128 odd-A and 77 odd-odd nuclei.The results improve by 54.2%and 53.6%,respectively,compared with HOPM.In addition,we extend the ISM to predict theαdecay half-lives of 144 nuclei with Z=117,118,119,and 120.For comparison,the improved model with eight parameters(DUR)proposed by Deng et al.[Deng,Phys.Rev.C 101,034307(2020)]and the modified universal decay law(MUDL)proposed by Soylu et al.[Soylu,Nucl.Phys.A 1013,122221(2021)]are also used.The predictions of these models and/or formulas are generally consistent with each other.

Simple model for cluster radioactivity half-lives in trans-lead nuclei

In this study,considering the modified preformation probability P_(c)to be log_(10)P_(c)=(A_(c)−1)/3log_(10)P_(α)+c′,where P_(α)and c′are theα-particle preformation probability and an adjustable parameter proposed by Wang et al.[Chin.Phys.C 45,044111(2021)],respectively,we extend a new simple model put forward by Bayrak[J.Phys.G 47,025102(2020)]to systematically study the cluster radioactivity half-lives of 28 trans-lead nuclei ranging from^(222)Fr to^(242)Cm,which is based on the Wentzel-Kramers-Brillouin approximation and Bohr–Sommerfeld quantization condition.For comparison,a universal decay law proposed by Qi et al.[Phys.Rev.C 80,044326(2009)],a three-parameter model-independent formula put forward by Balasubramaniam et al.[Phys.Rev.C 70,017301(2004)],and the semi-empirical model proposed by Tavares et al.[Eur.Phys.J.A 49,1(2013)]are used.Our calculated results reproduce the experimental data well,with a standard deviation of 0.818.Furthermore,we use this model to predict the cluster radioactivity half-lives of 51 possible cluster radioactive candidates whose cluster radioactivities are energetically allowed or observed but not yet quantified in NUBASE2020.

Parameterized Post-Post-Newtonian Light Propagation in the Field of One Spherically-Symmetric Body

We derive a more generally parameterized post-post-Newtonian solution for the light propagation in the gravitational field of one spherically-symmetric body.Based on the solution for the light velocity,we give the formula of the light deflection when both the emitter and receiver are located in the regions far away from the body,which is the most important scenario in the real applications.Our results can be applied to more metric theories of gravitation.