仿刺参肠多糖提取物对小鼠实体瘤的抑制作用

采用碱解、酶解和醇沉淀法提取仿刺参Apostichopusjaponicus肠组织中的粗多糖（简称肠多糖）,通过构建小鼠I-122肝癌实体瘤模型,采用腹腔给药途径,研究了不同剂量的肠多糖[200、100、50mg／（kg·d）]对小鼠实体瘤的抑制作用,并测定了小鼠的脾脏指数、胸腺指数以及血清中肿瘤坏死因子（TNF—α）和白细胞介索2（IL-2）的含量。结果表明：肠多糖对患H22肝癌小鼠的实体瘤具有显著的抑制作用,肠多糖高剂量组小鼠的瘤质量与肿瘤对照组差异极显著（P〈0．01）,肠多糖中、低剂量组的瘤质量与肿瘤对照组差异显著（P〈0．05）,肠多糖高、中、低剂量的抑瘤率分别为90．1％、85．2％和71．7％;各肠多糖组小鼠的脾脏指数与肿瘤对照组均无显著差异（P〉0．05）,但随着肠多糖剂量的上升,小鼠的脾脏指数也上升;各肠多糖组小鼠的胸腺指数均高于肿瘤对照组,除肠多糖低剂量组外其余各组均与肿瘤对照组差异显著（P〈0．05）;肠多糖高剂量组小鼠血清中的IL-2含量极显著高于3个对照组（P〈0．01）,而肠多糖中、低剂量组血清中的IL-2含量与肿瘤对照组、给药健康对照组均无显著差异（P〉0．05）;肠多糖高、中、低剂量组小鼠血清中的TNF—α含量与3个对照组均无显著差异（P〉0．05）。     

基于供需匹配的连锁超市农产品物流外包研究

概述了我国连锁超市农产品物流外包和第三方物流公司的发展现状,结合现代连锁超市农产品物流外包的意义以及动因,提出了目前两者的物流能力不相匹配的问题,重点论述了需求方外包给谁、外包什么以及外包程度这3个问题,从而得到农产品物流外包需求方(连锁超市)与提供方(第三方物流)两者能力相匹配的连锁超市农产品物流外包决策。     

TNFAIP3和TNIP1基因在寻常型银屑病中的表达及意义

目的检测轻度和中重度寻常型银屑病患者的皮肤中肿瘤坏死因子-α诱导蛋白质3（TNFAIP3）和TNFAIP3相互作用蛋白质1（TNIP1）mRNA表达。方法采用实时荧光定量PCR来检测20例寻常银屑病患者皮损和正常皮肤中TNFAIP3和TNIP1 mRNA表达。结果与正常皮肤相比,10例轻度银屑病患者皮损中出现TNFAIP3基因表达下调和TNIP1基因表达上调（P〈0.05）。10例中重度银屑病患者的正常皮肤和皮损中,TNFAIP3和TNIP1 mRNA表达差异无统计学意义（P〉0.05）。结论 TNFAIP3和TNIP1 mRNA表达异常可能在寻常性银屑病的早期发挥作用。     

超声联合钼靶X线检查在乳腺良恶性肿瘤鉴别诊断中的应用

目的评价超声联合钼靶X线检查在乳腺良恶性肿瘤鉴别诊断中的应用价值。方法经病理证实的168个乳腺肿瘤术前均行超声及钼靶X线检查,评估两种诊断方法及联合应用的灵敏度、特异度、阳性预测值、阴性预测值及诊断符合率。结果 168个乳腺肿瘤中,良性113个,恶性55个。除钼靶对恶性肿瘤钙化的显示率高于超声之外（P〈0.01）,两者在其余指标的检测差异均无统计学意义（P〉0.05）。二者联合诊断乳腺良恶性肿瘤的特异度、阳性预测值及符合率均优于单用超声、钼靶,差异均有统计学意义（P〈0.01或0.05）。结论超声和钼靶X线联合应用可显著提高乳腺肿瘤的诊断符合率。     

Kiss-1基因功能的研究进展

Kiss-1基因编码的Kisspeptins可通过其受体GPR54的介导来调控哺乳动物生殖内分泌。近年来的研究表明,Kiss-1基因具有抑制肿瘤转移、影响滋养细胞浸润、启动动物青春发育、调控能量平衡以及生物节律的功能。因此,本文就Kiss-1基因功能的研究进展做一综述。     

Laryngeal rhabdomyoma in a dog

A 3‐year‐old, female spayed Australian Shepherd dog was presented to Veterinary Healthcare Associates in Winter Haven, FL with a history of respiratory stridor, difficulty swallowing, and a change in bark for approximately 3 months. Radiographs revealed a soft tissue mass caudal to the epiglottis. Oral and computerized tomographic (CT) examinations were performed under general anesthesia and revealed a small firm mass in the caudal larynx on the right side. Cytologic evaluation of a fine‐needle aspirate of the mass revealed cells consistent with a rhabdomyoma, oncocytoma, or granular cell tumor. Histopathologic interpretation was rhabdomyoma or oncocytoma. Histochemical staining with periodic acid‐Schiff was mostly negative with a low number of weakly positive cells and with phosphotungstic acid‐hematoxylin was strongly positive with visible cross striations. Tumor cells did not express pancytokeratin AE1/AE3, were strongly immunoreactive for myoglobin and muscle‐specific actin, and did not express vimentin except for a low number of weakly immunoreactive cells. These findings confirmed a diagnosis of rhabdomyoma. Primary neoplasia of the larynx is rare, and widely varying types of neoplasms have been documented in this location. Due to the cytologic and histologic similarities between rhabdomyoma, oncocytoma, and granular cell tumor, these neoplasms should be differentiated using histochemical staining and immunohistochemical analysis.     

犬基底细胞癌的病理组织学观察

基底细胞癌(basal cell carcinoma,BCC)是一种常见的低度皮肤恶性肿瘤,又名基底细胞上皮癌、基底细胞癌和侵蚀性溃疡。本文主要探讨皮肤基底细胞癌的临床病理诊断和鉴别诊断要点,为提高基底细胞癌的诊治水平提供依据。通过病理组织学观察,皮肤破溃、出血,肿瘤细胞成团块状增生,由结缔组织分割为不规则小叶状。细胞呈梭形、多边形及近圆形;细胞核圆形,核膜清晰,有一明显核仁,有一定异形性,偶见分裂相,作为确诊基底细胞肉瘤的主要依据,并对疾病的处理和治疗方法进行了归纳和总结。     

Magnetic resonance imaging of canine mast cell tumors

Mast cell tumors (MCT) are the most common cutaneous tumors in dogs. Our purpose was to describe the magnetic resonance (MR) imaging characteristics of cutaneous MCT and to identify imaging characteristics that allow differentiation of metastatic from normal lymph nodes. Eight dogs with a total of nineMCT were imaged as were their presumed draining and associated contralateral lymph nodes. The signal intensity of tumors and lymph nodes was compared to adjacent musculature. On T2-W images, 7/9 MCT were hyperintense to muscle and 2/9 were isointense. On T1-W images, 8/9 MCT were isointense and 1/9 were mildly hypointense. All tumors were strongly contrast enhancing; 5/9 were homogeneous and 4/9 heterogeneous in their enhancement patterns. Six lymph node pairs were included in the evaluation (five sentinel lymph nodes with metastases, one without, and six contralateral lymph nodes). Metastatic lymph nodes were significantly larger than their contralateral lymph nodes (P = 0.039). All lymph nodes were isointense on T1-W images and hyperintense on T2-W images. 5/5 metastatic and 2/7 normal lymph nodes were heterogeneously T2-hyperintense. All lymph nodes were moderately to strongly contrast enhancing. 4/5 metastatic and 2/7 normal lymph nodes had heterogeneous enhancement patterns. While heterogeneity was more common in metastatic than in normal lymph nodes, this difference was not significant (P = 0.058 for T2-W images; P = 0.234 for postcontrast images). MR imaging may be useful in the presurgical evaluation and clinical staging of cutaneous MCT.     

Sertoli cell tumors associated with feminizing syndrome and spermatic cord torsion in two cryptorchid dogs

The association of cryptorchidism, functional Sertoli cell tumors, and spermatic cord torsion has been rarely reported in the literature. Two dogs were admitted for bilateral skin alopecia and weight loss. Both animals were cryptorchid and displayed a pendulous preputial sheath, prostate hypertrophy, and increased levels of circulating oestrogen. Transabdominal palpation and ultrasonography revealed the presence of neoplastic retained gonads. During surgery, spermatic cord torsion was also detected in the enlarged neoplastic testes of both dogs. Histologic examination confirmed the presence of Sertoli cell tumors that were primarily responsible for the feminizing syndrome. Complete remission of all symptoms occurred within 3 months after orchiectomy.