Lung preservation solution substrate composition affects rat lung oxidative metabolism during hypothermic storage

Lungs harvested for transplantation utilize oxygen after procurement. We investigated the effects of storage solution substrate composition on pulmonary oxidative metabolism and energetics during the preservation interval. Rat lungs were harvested and stored at 10 degrees C in low-potassium dextran (LPD) solution. Groups of lungs were preserved with preservation solution containing 5mM carbon-13 ((13)C) labeled glucose or increasing concentrations of (13)C labeled pyruvate. Additional groups of rat lungs were studied with dichloroacetate (DCA) added to the pyruvate-modified preservation solutions. Oxidative metabolism (measured by (13)C-enrichment of glutamate) and adenine nucleotide levels were quantified. Increasing preservation solution pyruvate concentration augmented glutamate (13)C-enrichment up to a concentration of 32mM pyruvate. DCA further stimulated oxidative metabolism only at lower concentrations of pyruvate (4 and 8mM). ATP and ADP were not different among groups, but AMP levels were higher in the glucose group. These data suggest that altering the substrate composition of the preservation solution influences lung metabolism during allograft preservation for transplantation.     

Human papillomavirus typing with a polymerase chain reaction-based genotyping array compared with type-specific PCR

BACKGROUND: Type-specific persistence of human papillomavirus (HPV) infection can cause invasive cervical cancer. OBJECTIVES: To evaluate the efficacy of HPV detection and typing with a general polymerase chain reaction (PCR)-based genotyping array and to compare it with a type-specific PCR assay. STUDY DESIGN: Four hundred and thirty-three cervical samples were tested with a modified MY11/GP6+ PCR-based reverse-blot assay (EasyChip HPV Blot; King Car, Taiwan [hereafter HPV Blot]) and with 20 genotypes of L1-type-specific PCR (HPV-6, -11, -16, -18, -31, -33, -35, -39, -45, -51, -52, -53, -56, -58, -59, -62, -66, -68, -70, and -71 [CP8061]). RESULTS: The concordance of the two tests in determining HPV positivity was 96.8% (419/433), with a Cohen's kappa=0.93 (95% CI: 0.90-0.97) and McNemar's test of P=1.0, which indicates excellent agreement. The overall concordance of the two tests in the identification of type-specific HPV was 91.0% (394/433). Sensitivity (90-100%), specificity (99.2-100%), and accuracy (98.6-100%) rates of HPV Blot against the gold standard were satisfactory for HPV-16, -18, -58, -33, -52, -39, -45, -31, -51, -70 while HPV-71 (63.6%) had suboptimal sensitivity. Though the kappa values between the two tests for many individual genotypes could not be reliably calculated because of low positivity, the kappa values for HPV-16, -52, and -58 were excellent (0.93, 0.96, and 0.95, respectively). CONCLUSION: The modified MY11/GP6+ PCR-based HPV Blot assay is accurate and sensitive for detection and genotyping of HPV in cervical swab samples.     

The effects of DNA containing CpG motif on dendritic cells

Dendritic cells (DC) are specialized antigen-presenting cells. DC can acquire and process antigens in the periphery before maturing and migrating to secondary lymphoid tissues where they present the antigens and deliver co-stimulatory signals to T cells. We describe an immunostimulatory oligonucleotide containing a CpG motif that stimulated murine DC to up-regulate co-stimulatory molecules, induce T-cell proliferative responses and secrete interleukin-12 in vitro. Administration of this oligonucleotide, but not of a control oligonucleotide lacking this motif, to mice led to the disappearance of DC from the marginal zone and T-cell areas of spleen, but not from heart or kidney. The same CpG did not cause maturation of monocyte-derived human DC in vitro, but lipopolysaccharide-treated monocyte-derived DC showed enhanced functional activity and up-regulated co-stimulatory molecules.     

TCRVβ7.1基因修饰T细胞对乳腺癌细胞杀伤作用的研究

目的：观察TCPVβ7．1基因转染前后正常人外周血淋巴细胞对乳腺癌细胞株杀伤活性的影响。方法：脂质体包裹PdWA3.1vβ7.1后转染健康人PBMC，流式细胞仪检测PdWA3.1Vβ7.1基因表达，改良MIT法检测TCRVβ7．1基因转染前后正常人外周血淋巴细胞对乳腺癌细胞株杀伤活性。结果：TCRVβ7．1基因转染可显著增加正常人PBMC该基因表达，转染前后正常人外周血淋巴细胞对乳腺癌细胞株杀伤活性有显著性差异。结论：用TCR基因修饰可明显提高正常人PBMC对乳腺癌细胞杀伤作用。     

充满型及非充满型胆囊结石粘膜病理形态及核仁组成区的研究

目的：探讨充满型及非充满型胆囊结石粘膜组织病理学的差异及相应外科治疗措施,方法：收集1995年10月至1996年10月期间的胆囊结石标本做常规病理染色及嗜银蛋白染色分析。结果：发现充满型及非充满型结石组胆囊粘膜不典型发生率及AgNOR数目均有显著差异。结论：一经诊断为充满型胆囊结石,特别是中老年肥胖妇女,应早期手术切除病变胆囊。     

早期食管癌的病理形态观察及组织发生学探讨

目的探讨早期食管癌的组织发生学.方法对109例早期食管癌及癌周病变进行病理观察.结果其中20例的一点癌(黄豆大小),3例双原发癌,1例小细胞癌.癌周伴有不同程度的鳞状上皮异形增生和不典型增生.结论早期食管具有多样性生长的特点.提示临床医生在胃镜检查应注意多点取材,以防漏诊;以及正确确定手术范围,防止手术残留.     

细胞因子在清肝化瘀汤治疗慢性粒细胞性白血病中的研究

目的观察中药清肝化瘀汤治疗慢性粒细胞性白血病(慢性期)的疗效,并探讨细胞因子水平变化的意义。方法收集45例慢性粒细胞性白血病慢性期患者(治疗组),用清肝化瘀汤治疗,观察患者的临床疗效、细胞因子水平。另用20名正常人作为对照(对照组)。结果治疗组完全缓解率40％,部分缓解率46.7％,总有效率86.7％。治疗组细胞因子水平中白介素2、可溶性白介素2受体、肿瘤坏死因子a治疗前后有显著差异(P<0.05);干扰素γ水平变化无显著差异。且与正常对照组比较无显著差异(P>0.05)。结论清肝化瘀汤有清热泻肝解毒、活血化瘀消癥的功效,研究结果显示,该药对慢性粒细胞性白血病慢性期(肝热血瘀型)疗效确切,其作用机理可能与改善细胞因子水平有关。     

Correction to: Effect of Polyvinyl Chloride Microplastics on Bacterial Community and Nutrient Status in Two Agricultural Soils

Bulletin of Environmental Contamination and Toxicology - The original version of the article unfortunately contained a mistake in Fig.&nbsp;3. In this figure, norank_o_DS-100 and Niastella were...