miR-194-5p通过FOXP2影响骨肉瘤SAOS-2细胞增殖和侵袭的研究

目的 探讨高表达miR-194-5p对骨肉瘤SAOS-2细胞增殖和侵袭的影响及机制。方法 实时荧光定量PCR方法检测骨肉瘤SAOS-2细胞与人成骨hFOB1.19细胞中miR-194-5p的表达水平,应用瞬时转染将miR-194-5p模拟物转染至骨肉瘤SAOS-2细胞,实时荧光定量PCR检测各组细胞中miR-194-5p、FOXP2 mRNA的相对表达水平,Western blot检测各组细胞中FOXP2蛋白表达,Targetscan7.2和双荧光素酶实验分析FOXP2与miR-194-5p的靶向关系,采用CCK8法检测各组细胞的增殖能力,transwell实验检测细胞侵袭能力。结果 miR-194-5p在骨肉瘤SAOS-2细胞中的表达低于人成骨hFOB1.19细胞（P<0.05）;过表达miR-194-5p使SAOS-2细胞中FOXP2mRNA和蛋白表达下降;Targetscan7.2网站分析及双荧光素酶实验证实FOXP2为miR-194-5p的靶基因;过表达miR-194-5p使SAOS-2细胞增殖、侵袭能力下降。结论 过表达miR-194-5p可以抑制骨肉瘤SAOS-2细胞...     

人参皂苷CK对人骨肉瘤细胞U2-OS增殖及迁移能力的影响

目的探讨人参皂苷CK对人骨肉瘤细胞U2-OS增殖及迁移能力的影响。方法将人骨肉瘤细胞U2-OS分为阴性对照组(Control组)和实验组(CK药物组),MTT方法与CCK-8方法检测细胞活性及增殖能力,细胞划痕实验及Transwell实验检测细胞迁移能力,Western blotting检测侵袭相关蛋白MMP-9及MMP-2的表达。结果CK能够显著降低U2-OS细胞体外活性及生存率(P0.05);细胞划痕实验及Transwell法证明CK可抑制U2-OS体外迁移能力(P0.05);CK处理后U2-OS细胞的MMP-9及MMP-2表达水平下调(P0.05)。结论人参皂苷CK对骨肿瘤细胞U2-OS的抑制作用与下调MMP-9及MMP-2表达水平相关。     

Gab2在人骨肉瘤细胞U2-OS中的表达及意义

目的:探讨Grb2协同结合蛋白2(Gab2)在人骨肉瘤细胞系中的表达及其与人骨肉瘤细胞侵袭转移的关系。方法:应用小RNA干扰技术,将合成的小RNA干扰质粒转染给人骨肉瘤U2-OS细胞,采用Western blotting和RT-PCR法检测转染后Gab2的蛋白和mRNA表达水平;体外细胞趋化运动实验和侵袭实验检测细胞的迁移和侵袭能力。结果:Gab2在人骨肉瘤U2-OS细胞系中高表达,且转染Gab2 siRNA后的细胞(Si Gab2/U2-OS)中Gab2蛋白及mRNA的表达水平低于转染scramble siRNA细胞(Scr/U2-OS)和U2-OS;趋化运动实验发现在10μg/L表皮生长因子(EGF)的诱导下Si Gab2/U2-OS细胞的迁移能力较U2-OS和Scr/U2-OS细胞明显下降,差异有统计学意义(P0.01);Si Gab2/U2-OS细胞侵袭并穿透Matrigel膜基质的细胞数量均比Scr/U2-OS细胞和U2-OS细胞少,Si Gab2/U2-OS细胞的体外侵袭能力显著降低(P0.01)。结论:利用siRNA干扰技术降低Gab2的表达对人骨肉瘤U2-OS细胞的迁移和侵袭能力有明显的抑制作用。     

miR-490-5p 靶向SP1 抑制骨肉瘤的发生发展

目的:研究miR-490-5p对骨肉瘤细胞生长和运动的作用。方法:体外实验设置control组、mimic-NC组、miR-490-5p mimic组、SP1组、mimic+SP1组,通过Lipofectamine 2000将质粒分别或联合转染进入各组骨肉瘤MG63细胞,运用基因预测软件预测靶基因,荧光素实验验证靶向关系,RT-qPCR检测miR-490-5p和SP1的表达,MTT法检测细胞增殖,Western blot检测Ki67、PCNA、Bcl-2、Bax、caspase-3、caspase-9、E-cadherin和N-cadherin的表达,Transwell检测细胞侵袭,划痕实验检测细胞迁移;体内实验设置Control组和miR-490-5p mimic组,分别在裸鼠右后肢腹侧皮下注射0.2 ml骨肉瘤MG63细胞和转染miR-490-5p mimic的骨肉瘤MG63细胞悬液,第30天颈椎脱位法处死裸鼠,电子天平称肿瘤重量,Western blot检测Ki67、Bax、caspase-3、E-cadherin蛋白表达情况。结果:miR-490-5p在骨肉瘤细胞MG63中低表达,miR-490-5p与SP1在3′UTR区存在结合位点,miR-490-5p直接靶向作用于SP1,且miR-490-5p过表达抑制SP1表达;在体外,miR-490-5p过表达明显降低骨肉瘤MG63细胞生长速度,下调Ki67、PCNA和Bcl-2表达,上调Bax、caspase-3和caspase-9表达,减少侵袭细胞数目,增宽划痕,降低愈合率,上调E-cadherin表达,下调N-cadherin表达;在体内,miR-490-5p过表达减轻肿瘤重量,降低Ki67、Bax和caspase-3的表达,升高E-cadherin表达。结论:miR-490-5p靶向SP1抑制骨肉瘤细胞MG63生长和运动。     

miR-129-5p靶向KLK7对卵巢癌SKOV3细胞增殖和侵袭的影响及分子机制

目的 探讨高表达miR-129-5p对卵巢癌SKOV3细胞增殖和侵袭的影响及分子机制。方法 采用实时荧光定量PCR方法检测卵巢癌SKOV3细胞与人正常卵巢上皮细胞株中miR-129-5p的表达。在卵巢癌SKOV3细胞中瞬时转染miR-129-5p模拟物及无意义序列,采用CCK8法及Transwell实验检测各组细胞的增殖能力和侵袭能力;实时荧光定量PCR检测miR-129-5p和KLK7的相对表达水平;Western blot检测各组细胞中KLK7蛋白表达;Targetscan 7.2和双荧光素酶实验分析miR-129-5p与KLK7的靶向关系。结果 miR-129-5p在卵巢癌SKOV3细胞中的表达低于人正常卵巢上皮细胞(P<0.05),过表达miR-129-5p降低SKOV3细胞中KLK7 mRNA和蛋白的表达,Targetscan 7.2网站分析及双荧光素酶实验证实KLK7为miR-129-5p的靶基因,过表达miR-129-5p抑制SKOV3细胞增殖和侵袭能力(P<0.05)。结论 过表达miR-129-5p可通过靶向调控KLK7抑制卵巢癌SKOV3细胞增殖和侵袭。     

miR-96通过靶向调控KRAS蛋白抑制骨肉瘤的增殖和转移

目的 探讨miR-96在骨肉瘤组织和细胞中的表达情况及其对骨肉瘤细胞的调控作用。方法 采用RT-qPCR方法检测骨肉瘤组织和骨肉瘤细胞系MG63和U2OS中miR-96的表达;miR-96 mimics转染骨肉瘤细胞后,CCK-8法检测细胞增殖;Transwell实验和划痕实验检测细胞侵袭和转移;荧光素酶报告基因实验检测miR-96与鼠类肉瘤病毒癌基因（KRAS）的3’UTR区的靶向结合作用。Western blot检测KRAS蛋白表达变化。结果 与对照组相比,骨肉瘤组织和细胞中miR-96表达较低。体外实验中发现,miR-96的过表达能够抑制骨肉瘤细胞增殖和侵袭、转移。荧光素酶报告基因实验发现KRAS的3’UTR是miR-96的靶点。miR-96过表达能下调骨肉瘤细胞中KRAS蛋白的表达。结论 miR-96在骨肉瘤患者中表达下调,miR-96过表达能显著抑制骨肉瘤细胞的增殖和侵袭转移,该作用与靶向调控KRAS蛋白相关。     

CD44对骨肉瘤细胞增殖、黏附和侵袭性的影响

目的研究细胞表面黏附分子CD44对骨肉瘤细胞增殖、黏附和侵袭特性的影响,探讨骨肉瘤细胞生长侵袭的机制。方法流式细胞术和Westernblot检测3株骨肉瘤细胞系MG63、HOS和U2-OS中CD44的阳性表达率和相对蛋白含量;逆转录聚合酶链反应(RTPCR)法研究3株细胞系之间CD44mRNA的表达差异;同时应用MTT法、美蓝硼酸盐法和微孔迁移技术研究阻断CD44的作用前后3株细胞的增殖、黏附和侵袭能力的变化。结果HOS和U2-OS中CD44的阳性百分率均高于99%,但HOS中CD44的平均荧光强度显著高于U2-OS(P<0.01);而MG63中CD44阳性百分率仅为(2.10±0.46)%;Westernblot亦证明HOS中CD44的蛋白含量显著高于U2-OS(P<0.05),而MG-63中CD44表达为阴性;CD44mRNA在HOS和U2OS中的表达也显著高于MG-63(P值均<0.05)。HOS的侵袭性显著高于MG63和U2-OS(P值均<0.01);HOS与MG63的增殖速率和黏附性差异无统计学意义,但均显著高于U2OS(P值均<0.01)。应用中和抗体阻断CD44的作用之后,HOS和MG-63的黏附性均显著降低(P值均为0.03),U2-OS的黏附性无明显变化(P=0.93);HOS和U2-OS的侵袭力显著降低(P值均<0.01),而MG-63的侵袭力无明显改变(P=0.18);3株细胞的增殖速率均无显著变化(P值均>0.05)。结论CD44能促进骨肉瘤细胞系HOS的黏附和侵袭,并参与U2-OS的侵袭和MG-63的黏附过程,但是不影响骨肉瘤细胞的增殖速率。     

miR-129-5p靶向HMGB1对卵巢癌细胞增殖、侵袭和迁移的影响及分子机制

为探讨miR-129-5p对卵巢癌(ovarian cancer,OC)细胞增殖、侵袭和迁移的影响及分子机制,qRT-PCR检测不同OC细胞株和正常人卵巢上皮细胞株中miR-129-5p的表达水平;在SKOV3细胞中分别转染miR-129-5p模拟物或无关序列,qRT-PCR检测转染后细胞中miR-129-5p的表达情况。生物信息学软件TargetScan预测miR-129-5p与高迁移率族蛋白B1(high mobility group box 1 protein, HMGB1)基因靶向结合位点,qRT-PCR、Western blotting和双荧光素酶报告基因实验分析miR-129-5p对HMGB1的靶向调控作用。分别采用MTT和Transwell实验检测SKOV3细胞增殖、侵袭和迁移能力。将miR-129-5p模拟物和HMGB1 siRNA或siRNA Control共转染至SKOV3细胞,MTT和Transwell实验检测其对细胞增殖、侵袭和迁移能力的影响。结果显示,SKOV3细胞中miR-129-5p的表达量显著低于正常人卵巢上皮细胞(P0.05)。在SKOV3细胞中转染miR-129-5p模拟物可显著提高miR-129-5p的表达量(P0.05)。miR-129-5p与HMGB1 3’非翻译区存在靶向结合位点,且过表达miR-129-5p可抑制HMGB1的表达,miR-129-5p模拟物转染后相对荧光素酶活性显著下降(P0.05)。过表达miR-129-5p后,SKOV3细胞增殖能力明显减弱,侵袭和迁移能力明显受到抑制(P0.05)。而转染HMGB1 siRNA后,miR-129-5p模拟物对SKOV3细胞增殖、侵袭和迁移的抑制作用明显减弱(P0.05)。以上结果表明miR-129-5p通过靶向调控HMGB1的表达抑制SKOV3细胞增殖、侵袭和迁移。     

miR-328-5p通过调控RAGE对异位子宫内膜细胞生物学功能的影响

目的 探讨miR-328-5p在异位子宫内膜细胞生物学功能中的作用及潜在机制。方法 实时荧光定量聚合酶链反应（RT-qPCR）和Western blot检测异位子宫内膜组织中miR-328-5p、RAGE mRNA和蛋白的表达。分离并培养异位子宫内膜基质细胞，将其分为NCmimic组、miR-328-5pmimic组、miR-328-5pmimic+Vector组、miR-328-5p mimic+pcDNA-RAGE组，RT-qPCR检测细胞中miR-328-5p和RAGE mRNA的表达；CCK-8实验检测细胞增殖能力；Transwell实验检测细胞侵袭和迁移能力；Westernblot实验检测RAGE蛋白的表达；生物信息学和双荧光素酶报告基因实验用来预测和验证miR-328-5p和RAGE的靶向关系。结果 与正常子宫内膜组织比较，异位子宫内膜组织中miR-328-5p表达显著降低，RAGE mRNA和蛋白表达显著升高（P<0.05）。与NC mimic组比较，miR-328-5p mimic组细胞中miR-328-5p表达显著升高，RAGE mRNA和蛋白表达显著降低，细胞...     

miR-425-5p靶向FOXJ3对乳腺癌细胞的作用研究

目的 探讨微小RNA-425-5p(miR-425-5p)靶向FOXJ3对乳腺癌细胞的作用.方法 用Lipofiectamine2000分别将miR-425-5p inhibitor及NC转染至MDA-MB-231乳腺癌细胞作为miR-425-5p inhibitor组和NC组,不做任何处理的为对照组.通过RT-qPCR测乳腺上皮细胞MCF10A及miR-425-5p inhibitor组、NC组、对照组中miR-425-5p及FOXJ3mRNA表达水平.通过MTT法测miR-425-5p inhibitor组、NC组、对照组细胞增殖情况;通过流式细胞仪测3组细胞凋亡情况;Transwell小室实验测细胞侵袭情况;Western-blot测细胞中FOXJ3、CyclinD1、Bcl-2、MMP-2蛋白表达情况;双荧光素酶实验验证miR-425-5p与FOXJ3的靶向关系.结果 与乳腺上皮细胞MCF10A比,乳腺癌细胞MDA-MB-231中miR-425-5p表达水平显著升高(P<0.05),FOXJ3mRNA表达水平显著下降(P<0.05);与对照组和NC组比,miR-425-5p inhibitor组细胞增殖、迁移、侵袭能力受到抑制,细胞凋亡率升高(P<0.05);双荧光素酶实验结果显示抑制miR-425-5p表达显著增加野生型FOXJ33'UTR萤光素酶活性,对突变型FOXJ33'UTR的萤光素酶活性无影响.结论 下调miR-425-5p可能通过靶向FOXJ3抑制乳腺癌细胞增殖、迁移、侵袭,并促进细胞凋亡.     

Schizophrenia in a North Swedish geographical isolate, 1900–1977. Epidemiology, genetics and biochemistry

Over 200 schizophrenic patients belonging to three major and interrelated pedigree complexes have been investigated over the past 30 years in a North Swedish geographically isolated population, presently numbering about 6,000. An intensive investigation of a number of biochemical correlates and genetic markers in a few selected families belonging to one of the major pedigrees has indicated new strategies for the current research program.
Schizophrenia, as defined operationally, is significantly associated with decreased activities of two enzymes (1) blood platelet monoamine oxidase, (2) plasma dopamine-β-hydroxylase, and (3) with the genetic marker Gc² (group specific antigen). Both enzymes are subject to genetic variation. A positive score for linkage between schizophrenia and low plasma DBH activity has been calculated, but, so far, available data are insufficient for discrimination between linkage and partial contribution of genetically controlled low plasma DBH to the pathogenesis of the disease. Alternatively, both mechanisms could be involved.
As a model for continued research, schizophrenia is explained as based on a double dominant-recessive genotype (Aabb), representing a vulnerability which in about 50 % of cases develops into clinical schizophrenia. It is suggested that the dominant mutation (A) operates on or affects MAO activity, and that the recessive genotype (bb) is instrumental in low variates of DBH activity and very likely such variates within the normal range of physiological variation. Moreover, it is suggested that the combined effects of MAO- and DBH-reduced efficiency on the metabolism of e.g. dopamine could be an essential pathogenic mechanism for the schizophrenic illness which is segregating in this population.     

HLA in North Colombia Chimila Amerindians

HLA-A,-B,-C,-DRB1 and -DQB1 alleles have been studied in Chimila Amerindians from Sabana de San Angel (North Colombian Coast) by using high resolution molecular typing. A frequent extended haplotype was found:HLA-A*24:02-B*51:10-C*15:02-BRB1*04:07-DQB1*03:02 (28.7%) which has also been described in Amerinndian Mayos Mexican population (Mexico, California Gulf, Pacific Ocean). Other haplotypes had already been found in Amerindians from Mexico (Pacific and Atlantic Coast), Peru (highlands and Amazon Basin), Bolivia and North USA. A geographic pattern according to HLA allele or haplotype frequencies is lacking in Amerindians, as already known. Also, five new extended haplotypes were found in Chimila Amerindians. Their HLA-A*24:02 high frequencies characteristic is shared with aboriginal populations of Taiwan; also, HLA-C*01:02 high frequencies are found in New Zealand Maoris, New Caledonians and Kimberly Aborigines from Australia. Finally, this study may show a model of evolutionary factors acting and rising one HLA allele frequency (-A*24:02), but not in others that belong to the same or different HLA loci.     

Renal dysplasia and asplenia in two sibs

A family is reported in which two sibs, one male and the other female, both died within 24 hours of birth with enlarged polycystic kidneys. Postmortem histology in the second child showed gross renal dysplasia. In both children the pancreas was enlarged, nodular and cystic but the liver appeared macroscopically normal. In the second child, histological examination confirmed pancreatic fibrosis with cystic dilation of ducts, but showed portal fibrosis with bile duct proliferation in the liver.
This combination of findings is very reminiscent of those in a girl and her brother reported by Ivemark et al. (1959). The children reported here also showed absence or hypoplasia of the spleen, cardiac anomalies and other features of the Ivemark syndrome (Ivemark 1955), a quite different, usually sporadic, congenital disorder. It is suggested that the children described here have a distinct lethal congenital disorder, probably inherited in an autosomal recessive manner.     

The universal muscular chamber. A basic unit of the genitourinary, cardiovascular, gastro-intestinal, skeletal, cutaneous, respiratory and other systems, endocameral hypertension; and spasm, the key to their idiopathic diseases and arthropathies

Starting with the integument, we see many organs are contractile sacs or multiples thereof, which tubes or bags constitute the major part of the entire body. Recognition of this basic unit and its characteristics sheds new light, individually and collectively, on many disorders previously considered unrelated. Muscular tears and perforations develop in the walls of these chambers, being no way peculiar to those organs, wherein, hydrochloric acid occurs. So, it is not necessary to explain the absence of excessive acid from patients who exhibit holes in the gastric, uterine, aortic, duodenal, rectal, pulmonary, retina, and other walls. Muscle, not acid is the great common factor relating idiopathic disorders in the gastrointestinal tract to each other and to similar diseases in other systems. When the units are linked together, the lesions tend to appear as arthropathies, i.e. at the joints. Rephrasing common-place observations, frees us from conventional, conceptual cul-de-sacs. An observation is only as good as its interpretation, so all possibilities must be considered, otherwise, we will remain blinded by our misconceptions.     

Der Einfluß von Nahrungsmitteln und Rauchen auf die klinisch-chemische Diagnostik von Phäochromozytom,Neuroblastom und Karzinoid-Syndrom

Zusammenfassung Der Einfluß von verschiedenen Nahrungsmitteln auf Methoden zur Bestimmung von Adrenalin (AD), Noradrenalin (NA), Vanillinmandelsäure (VMS), Metanephrinen (MN), Homovanillinsäure (HVS) und 5-Hydroxyindolessigsäure (5-HIE) im 24 h-Harn zur Diagnose des Phäochromozytoms bzw. Karzinoid-Syndroms wurde untersucht. Die in die Untersuchung einbezogenen Nahrungsmittel waren: Tee, Kaffee, Mandeln, Ananas, Käse, Walnüsse, Vanillepudding, Bananen, Tomaten und Milchschokolade. Außerdem wurde der Einfluß des Zigarettenrauchens auf die Bestimmung von AD, NA, VMS und MN untersucht.Walnüsse führten zu einer starken Erhöhung der 5-HIE-Ausscheidung. Bananen erhöhten die Ausscheidung von AD, NA, VMS, MN und 5-HIE. Kaffee und Ananas bewirkten eine geringe Zunahme der MN-Werte. Rauchen von 20–30 Zigaretten/Tag beeinflußte keine der vier Variablen.Wenn die beschriebenen Methoden benutzt werden, sollte lediglich auf den Verzehr von Bananen und Walnüssen vor und während der Harnsammelperioden verzichtet werden, da die oberen Normgrenzen im Harn überschritten werden könnten. Ein Verzicht auf Kaffee und Ananas in normalen Mengen ist nicht erforderlich. Es besteht kein Anlaß, weiterhin die bisherigen umfangreichen Restriktionen der übrigen Nahrungsmittel beizubehalten.     

A comparative study of the effects of dimebon,obsidan, finoptin,and cordaron on the functional state of ischemic focus and size of necrotic zone in experimental myocardial infarction

Dimebon, an antihistamine agent, exerts a moderate antianginal effect, improving the function of ischemic focus in the myocardium and decreasing the necrotic zone in experimental myocardial infarction. Dimebon is less active than obsidan, finoptin (except for the size of the necrotic zone), and cordaron. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 122, No. 12, pp. 642–644, December, 1996     

Effects of sex steroid hormones on lipid peroxidation and glutathione antioxidant system in rat skin

Effects of estradiol and testosterone on the intensity of lipid peroxidation and contents of glutathione redox system components in the dermis and epidermis of rat skin were studied. Only estradiol induced considerable dose-dependent and tissue-specific biphasic antioxidant effects on the skin. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 128, No. 12, pp. 663–666, December, 1999     

Adhesion and growth of CaCo2 cells on surface-modified PEEK substrata

A series of surface-functionalized poly(ether ether ketone) (PEEK) films has been prepared by selective wet-chemistry; they are hydroxylated polymer (PEEK-OH) obtained by reduction, aminated polymer (PEEK-[]-NH2) prepared by coupling a diisocyanate reagent to PEEKOH (PEEK-[]-NCO) followed by hydrolysis, and carboxylated and aminocarboxylated polymers (PEEK-[]-GABA and PEEK-Lysine) resulting from the coupling of aminoacids to PEEK-[]-NCO. The aminated and carboxylated substrata promoted the adhesion and growth of CaCo2 cells in the presence of serum. Fibronectin (FN), an extra-cellular matrix protein, has been covalently fixed and/or adsorbed on various PEEK substrata, in the presence or not of a polymeric surfactant (Pluronic F68). The performances of the FN-grafted substrata (PEEK-[]-FN(1) and PEEK-[]-FN(2)) were significantly higher than those of reference substrata simply coated with FN (PEEK-OH(+FN)(1) and (2), PEEK-[]-NH2(+FN)(1) and (2)), considering the adhesion and spreading of CaCo2 cells in the absence of serum. Moreover, the stability of the adherent cells on the FN-adsorbed substrata dramatically depended on the experimental conditions applied during the PEEK coating with FN.