Age-related differences in foraging behavior of Montagu's harrier<Emphasis Type="Italic"> Circus pygargus</Emphasis> males in south-east Poland

The hunting behaviour and habitat use of second-calendar-year males (subadult) and grey (adult) males of Montagu's harrier Circus pygargus were compared in south-east Poland. Subadult males performed cruising flights less frequently than did adult males. In contrast, subadult males more frequently soared thermals and were harassed more often by other birds. Overall, adult males were more frequently engaged in hunting activities than subadult males. Additionally, adult males were more successful in trapping prey than were subadult males. Only 7% (n=92) of trapping attempts by subadult males were successful, compared with 17% (n=126) by grey males. Both adult and subadult males tried to catch prey flushed by foxes Vulpes vulpes. Subadult males were seen begging and pirating from prey-carrying raptors. Communicated by M.E. dos Santos     

Role of Connexin37 and Connexin40 in Vascular Development

Mice lacking both connexin37 (Cx37) and connexin40 (Cx40), gap junction proteins expressed in vascular endothelium, die perinatally with pronounced vascular abnormalities. Early vasculogenesis proceeds normally, but by E18.5 Cx37^?/?Cx40^?/?animals display vessel dilatation and congestion as well as localized hemorrhages in skin, testis, intestines, and lungs. Abnormal vascular channels are present in the testis, often forming cavernous hemangioma-like defects. Unusually large, distended vessels are also present in the submucosa and lamina propria of the intestine. Ablation of Cx40 has a greater effect on endothelial dye-transfer than ablation of Cx37, and the effect of Cx40 ablation is age-dependent. Only in embryonic aortas lacking both Cx37 and Cx40 is there a complete loss of endothelial coupling. Surprisingly, elimination of Cx40 results in a large drop in aortic endothelial Cx37 on western blots, and deletion of Cx37 also reduces endothelial Cx40 levels. In contrast, in the medial layer, both Cx37 and Cx43 increase when Cx40 is ablated. These studies indicate that Cx37 and Cx40 are collectively critical for endothelial communication and provide evidence of an important role for gap junctions in vascular development. In addition, Cx37 and Cx40 appear to be mutually dependent on each other for normal expression in vascular endothelium.     

微生态制剂联合小儿康治疗儿童迁延性腹泻机制研究

目的:探讨微生态制剂思连康联合小儿康治疗儿童迁延性腹泻的疗效,并进一步探讨其机制.方法:我院共收治60例腹泻患儿,随机分为两组,均在常规治疗基础上治疗组加用思连康联合小儿康,对照组加用杜拉宝治疗儿童腹泻.观察两组的疗效,以及两组临床症状的好转情况及住院时间的比较.酶联免疫吸附双抗体夹心法(ELISA法)检测两组患者血清和粪便白介素6和8(IL-6和IL-8)的变化.结果:治疗组总有效率为90％,高于对照组(P＜0.05);临床症状的好转情况及住院时间的比较优于对照组(P＜0.01).治疗后血清及大便细胞因子IL-6和IL-8均有降低,并优于对照组(P＜0.05).结论:思连康联合小儿康治疗儿童迁延性腹泻,疗效显著,值得广泛推广.其机制可能与下调炎性细胞因子有关.     

婴儿痉挛症脑干信息传导障碍的混沌学研究

婴儿痉挛症（Infantile Spasms,IS）是婴幼儿难治性癫痫。IS的发病机理至今也不清楚,目前比较一致的假说是：脑干是IS的责任结构,但该假说不能用神经生理学的传统方法来证实。从信息学的角度,婴儿弃挛症的发病机制可能是源自脑干神经信息传递障碍的脑干功能失调,为了证实这一论点,用可以反遇脑干传导功能的听觉诱发响应的相关维数,来评估脑干神经信息传导不同的功能状态,经过对IS患者、颞叶癫痫患者和健康人三个组的结果比较分析,表明IS患者脑干听觉诱发响应的相关维数明显低下,而颞叶癫痫患者该相关维数在颞叶病灶处最低。以上结果,证实了IS患者脑干神经信息传导功能障碍的存在。     

小儿推拿疗法联合中药热奄包治疗小儿夜啼的疗效及对睡眠质量和生长发育的影响

摘要 目的：探讨小儿推拿疗法联合中药热奄包治疗小儿夜啼的疗效及对睡眠质量和生长发育的影响。方法：选取2019年4月~到2021年8月期间石家庄市中医院收治的120例夜啼患儿作为研究对象。根据双色球法将患儿分为对照组（常规药物治疗）和观察组（对照组的基础上接受小儿推拿疗法联合中药热奄包治疗）,各为60例。对比两组疗效、中医证候评分、睡眠质量、生长发育相关指标和不良反应发生情况。结果：与对照组相比,观察组的临床总有效率明显升高（P<0.05）。与对照组相比,观察组治疗1周后啼哭、腹喜按摩、睡喜蜷曲、四肢欠温、大便稀溏、小便色清评分更低（P<0.05）。与对照组相比,观察组治疗1周后白天睡眠时间、夜间睡眠时间更长,夜间清醒时间更短,夜醒次数更少（P<0.05）。与对照组相比,观察组治疗6个月后年龄别体质量Z值（WAZ）、年龄别身长Z值（LAZ）、身长别体质量Z值（WLZ）和头围Z值（HCZ）更大（P<0.05）。治疗期间两组均未出现不良反应。结论：小儿推拿疗法联合中药热奄包治疗小儿夜啼,可有效改善患儿临床症状,提高睡眠质量,促进生长发育。     

双歧杆菌四联活菌片治疗小儿厌食症的疗效及预防复发作用

目的探讨双歧杆菌四联活菌片治疗小儿厌食症的疗效及预防复发作用。方法将88例小儿厌食症患者随机分为观察组和对照组。两组患儿均予以纠正不良饮食习惯、健胃消食药和葡萄糖酸锌等常规治疗。观察组患儿加用双歧杆菌四联活菌片2片,2次／d,连用6周。对照组患儿除不使用双歧杆菌四联活菌片余治疗同观察组。观察两组患儿治疗后临床疗效及药物不良反应情况,并比较治疗后随访半年和1年内的复发率。结果治疗6周后,观察组患儿的总有效率为93．18％,明显高于对照组的77．27％（x^2=4．42,P〈0．05）;两组患儿治疗期间未发生明显的药物不良反应;对治疗有效者进行随访,观察组患儿半年和1年内的复发率均明显低于对照组（x^2=5．07和5．66,P〈0．05）。结论双歧杆菌四联活菌片治疗小儿厌食症的疗效较好,安全性佳,并能降低其复发率,具有预防复发的作用。     

致蛋鸡血管瘤J亚群禽白血病病毒cDNA全序列分析

【目的】了解近年来我国商品蛋鸡群中以血管瘤为主要表型的J亚群禽白血病病毒(Avian Leukosis Virus subgroup J,ALV-J)的分子生物学特性,为控制ALV-J在鸡群中流行提供基础资料。【方法】采用PCR扩增和序列分析技术,对分离自血管瘤或者血管瘤与髓样细胞瘤(Myeloid Leukosis,ML)并存的3株蛋鸡ALV-J毒株前病毒DNA的全序列及3株商品蛋鸡血管瘤型分离毒和1株商品蛋鸡ML型分离毒的致瘤关键性序列进行研究。【结果】来自血管瘤或者血管瘤与ML并存的商品蛋鸡分离毒株与来自肉鸡分离毒株的全序列差异明显,在遗传进化树上分属两个大的分支;研究发现商品蛋鸡血管瘤及ML混合病例分离毒JS09GY3与JS09GY6株的引物结合位点(Primer Binding Site,PBS)-Leader中出现极为罕见的连续19bp的插入突变,其与劳斯相关病毒1(Rous Associated Virustype1,RAV-1)、劳斯相关病毒2(Rous Associated Virustype2,RAV-2)及劳斯肉瘤病毒施密特-鲁宾二氏[Rous sarcoma virus(strain Schmidt-RuppinB),RSV-SRB]毒株序列相同;通过对U3区调控元件的分析,发现血管瘤商品蛋鸡病例分离毒NHH与JS09GY5的U3区各发生1处连续序列缺失,出现了极为独特的c-Est-1、TCF11及C/EBP结合位点,这些调控元件可能与病毒的致肿瘤特性相关;所测的5株血管瘤商品蛋鸡分离毒均保留完整E元件,而所有肉鸡分离毒的E元件均发生了几乎相同的大部分序列缺失;首次发现血管瘤商品蛋鸡分离毒JS09GY3的E元件中有11bp的连续插入序列。【结论】商品蛋鸡血管瘤型ALV-J与肉鸡分离毒在全序列上差异明显,U3、DR1和E元件等区域有一部分特殊的突变与毒株的宿主类型和肿瘤表型有一定关系,其功能尚需进一步研究。而血管瘤型、髓细胞瘤型ALV-J可能是ALV-J与其它反转录病毒的重组毒。     

胶体金法与RT-PCR法测定A群轮状病毒及G血清型分型

目的了解婴幼儿A群轮状病毒腹泻的流行病学特征。方法收集浙江省苍南县人民医院2009年1-12月份的婴幼儿腹泻粪便标本,采用胶体金免疫层析法和逆转录-聚合酶链反应法进行轮状病毒抗原检测和血清型分型,分析G血清型分型。结果 828份婴幼儿腹泻粪便轮状病毒阳性率为33.45%。在轮状病毒腹泻患儿中,1岁以内占49.82%,2岁以内占89.89%。本地区轮状病毒腹泻呈现季节高峰,11月至次年1月为轮状病毒腹泻流行期。毒株分型显示G3型为流行优势株（51.6%）,其次是G1型（26.6%）;另有13.7%为混合感染,包括G1＋G3型（10.5%）、G2＋G3型（2.4%）和G1＋G9型（0.8%）。结论 2009年浙江省苍南县婴幼儿轮状病毒腹泻的主要血清型是G3和G1,G3为优势毒株。 更多还原