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91.
92.
Rat ferritin-H: cDNA cloning, differential expression and localization during hepatocarcinogenesis 总被引:2,自引:0,他引:2
Wu CG; Groenink M; Bosma A; Reitsma PH; van Deventer SJ; Chamuleau RA 《Carcinogenesis》1997,18(1):47-52
Elevated serum ferritin levels, especially of the H subunit, accompany many
clinical malignancies. By using the subtraction-enhanced display technique,
we have recently isolated several cDNA clones which are over- expressed in
rat hepatocellular carcinoma induced by diethylnitrosamine. One
830-base-pair clone was 88% similar to human ferritin-H cDNA and encoded a
182 amino acid protein which is 97% homologous to human ferritin-H chain.
Hepatic mRNA levels of ferritin-H were increased markedly at the early
stage of diethylnitrosamine- induced hepatocarcinogenesis in the rat (6
weeks) and appeared more than 10-fold overexpressed as the tumour
progressed. In contrast, hepatic ferritin-H mRNA remained constant during
liver regeneration after a 70% partial hepatectomy. In situ hybridization
showed that over- expression of ferritin-H was exclusively localized to
preneoplastic foci, to tumour nodules and to tumour cells invading blood
vessels. These findings suggest that ferritin-H is a highly conserved
protein, its over-expression during tumour development is phenotypically
correlated with tumour initiation and/or progression, and it is useful as
an early marker for hepatocellular carcinoma.
相似文献
93.
Genomic screening for beta-sarcoglycan gene mutations: missense mutations may cause severe limb-girdle muscular dystrophy type 2E (LGMD 2E) 总被引:7,自引:3,他引:7
Bonnemann CG; Passos-Bueno MR; McNally EM; Vainzof M; de Sa Moreira E; Marie SK; Pavanello RC; Noguchi S; Ozawa E; Zatz M; Kunkel LM 《Human molecular genetics》1996,5(12):1953-1961
Autosomal recessive limb-girdle muscular dystrophies (LGMDs) are
genetically heterogeneous. A subgroup of these disorders is caused by
mutations in the dystrophin-associated sarcoglycan complex. Truncating
mutations in the 43 kDa beta-sarcoglycan gene (LGMD 2E) were originally
identified in a sporadic case of Duchenne-like muscular dystrophy, and a
common missense mutation (T151R) was identified independently in Indiana
Amish pedigrees with a milder form of LGMD. To facilitate mutational
analysis of larger numbers of patients directly from genomic DNA, as
opposed to reverse transcribed RNA from muscle biopsies, we have determined
the genomic structure of the beta-sarcoglycan gene. The open reading frame
of the beta-sarcoglycan coding region extends over six exons. Primers were
designed for PCR amplification of single exons from genomic DNA and
subsequent single strand conformation polymorphism (SSCP) analysis. We
screened 15 patients from the Brazilian LGMD patient population, 13 of whom
followed a severe course. Most of the patients had been assessed previously
for deficiency of alpha- sarcoglycan immunofluorescence on muscle biopsy
sections as a marker for disease of the sarcoglycan complex. Novel
mutations in two familial and two sporadic cases of severe childhood-onset
LGMD were identified. Only one of these patients carried a truncating
mutation (homozygous 2 bp deletion, FS164TER), while the other three
carried missense mutations (homozygous R91P, homozygous M100K, heterozygous
recessive L108R; only one allele could be identified in this family). All
three missense mutations occurred in exon 3, coding for the immediate
extracellular domain. Complete absence for all three of the known
sarcoglycans was noted by immunohistochemistry on muscle biopsy sections of
the patients.
相似文献
94.
95.
Summary of mutations underlying autosomal recessive congenital ichthyoses (ARCI) in Arabs with four novel mutations in ARCI‐related genes from the United Arab Emirates
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96.
目的:观察承载丸含药血清对甲基强的松龙预处理的MC3T3-E1成骨细胞L-钙通道电流的影响。方法:实验于2006-04/06在中国中医科学院望京医院药理实验室及吉林大学基础医学院生理教研室完成。①实验材料:MC3T3-E1(购于北京协和细胞中心);8个月龄SD大鼠10只,雌雄各半;中药制剂承载丸(由鹿角霜、肉苁蓉、续断、黄芪、当归、炙水蛭、杜仲、蛋衣、皂角刺、香附、乌药等21味中药组成);甲基强的松龙(批号H20040338,Pharmacia NV/SA生产)。②实验干预:成骨细胞(MC3T3-E1)传代培养。承载丸药粉60g,加水至200mL搅匀,取大鼠6只(雌雄各半),每只灌服2.5mL/d,灌服4d后动脉取血,制备含药血清。另取大鼠4只,同法灌服生理盐水,制成不含药血清。甲基强的松龙的浓度为1×10-5mol/L。③实验分组:将培养后的成骨细胞株分为4组:正常组(加入正常大鼠不含药血清)、模型组(加入正常大鼠不含药血清及甲基强的松龙)、承载丸低剂量组(加入甲基强的松龙及0.5mL承载丸含药血清)和承载丸高剂量组(加入甲基强的松龙及0.1mL承载丸含药血清)。④实验评估:24h后,用全细胞膜片钳技术记录每组10个细胞的L-钙通道电流,并测定其峰值电流。结果:①各组电流峰值测定结果:模型组峰值电流比正常组下降19.5%[(0.1839±0.0179),(0.2284±0.0209)nA,P<0.01];承载丸低剂量组和高剂量组比模型组分别升高37.4%和45.2%[(0.2526±0.0093),(0.2671±0.0120),(0.1839±0.0179)nA,P<0.01];承载丸高低剂量组相比差异有显著性意义(P<0.05)。②MG3T3E1细胞钙电流的特性分析:正常组,钙通道大约在-20mV时开放,最大峰值电流在 20~ 30mV,反转电位在 60~ 70mV。当在浴液中加入Co2 ,可阻断此电流的大部分电流成份,其峰值电流为(0.1050±0.0097)nA,而钙离子激活剂Bayk8644增加了此电流(0.3335±0.0323)nA。结论:①甲基强的松龙抑制成骨细胞L-钙通道电流。②承载丸含药血清可升高甲基强的松龙预处理的成骨细胞L-钙通道电流。 相似文献
97.
98.
A study was undertaken to investigate compliance in patients receiving growth hormone treatment. Two hundred patients completed a questionnaire designed to establish understanding about and compliance with treatment; 50% of our patients failed to comply with all aspects of their treatment. Failure to respond to treatment seems to be associated with poor compliance. 相似文献
99.
Losi MA Betocchi S Aversa M Lombardi R Miranda M D'Alessandro G Cacace A Tocchetti CG Barbati G Chiariello M 《The American journal of cardiology》2004,94(7):895-900
Predictors of the development of atrial fibrillation (AF) in patients who have hypertrophic cardiomyopathy (HC) have not been extensively studied, although, in these patients, AF contributes to the exacerbation of symptoms and the development of heart failure. The present study determined the role of left atrial (LA) function in the development of AF in patients who have HC. One hundred fifty consecutive patients who had HC, had no history of AF, and who were followed for 5.2 +/- 2.9 years constituted the study population. Using M-mode echocardiography, we measured LA function as global LA fractional shortening and LA diameter. LA volume was measured from 2-dimensional 4-chamber views by the method of disks. During follow-up, 20 patients developed AF. LA function was an independent predictor of AF (odds ratio 0.716, p = <0.001), whereas LA diameter and volume were predictors in addition to age. Kaplan-Meier analysis showed that LA dysfunction carried a high risk of AF. Thus, in patients who have HC, LA function is a strong predictor of AF development and is independent of age. 相似文献
100.
D?Anil?Kumar RN?Suresh?Kumar PN?Rao S?Chandran H?Mahmoud AS?Pillay DK?Saxena CG?Venkitachalam T?Cartmill IM?RaoEmail author 《Indian Journal of Thoracic and Cardiovascular Surgery》2003,19(4):159-162
Background The major strategy for palliation of cyanotic lesions in neonates is the systemic to pulmonary arterial shunt.
Methods Between May 1995, and December 2002, 48 consecutive neonates underwent systemic to pulmonary arterial shunts for cyanosis
with reduced pulmonary blood flow. The mean age was 11.6 days (±SD 7.38) and the mean weight, 3.2kg (±SD 0.52). The babies
were classified into three groups: Group I-Tetralogy-pulmonary Atresia (n=18), Group II-single Ventricle-Pulmonary atresia
without (n=19) and with (n=5) isomerism, Group III-Pulmonary Atresia with Intact ventricular septum (n=6). Diagnosis was made
by 2D echocardiography. Indication for cardiac catheterization was delineation of pulmonary anatomy/ductus laterality (n=4)
or balloon atrial septostomy (n=4). The surgical procedure was a modified Blalock-Taussig shunt on the side of the situs.
Post-operatively, no anti-coagulation or anti-platelet medication was employed.
Results There was no mortality. Four cases required revision of the shunt in the immediate post-operative period for shunt thrombosis.
The mean follow up was 17.54 months (±SD 8.36). In Group I, nine patients have undergone total correction with or without
a conduit, while three required new arterial shunts for shunt/pulmonary artery stenosis. In Group II, nine patients have undergone
bi-directional Glenn with atrial septectomy (n=2) and pulmonary artery plasty (n=4) and one patient underwent Fontan completion.
In Group III, two patients underwent bi-directional Glenn and two had pulmonary valvotomy with/without right ventricular outflow
tract widening. All the remaining babies are waiting for the second/final stage palliation or total correction.
Conclusion Systemic to pulmonary arterial shunts in neonates is a gratifying and reasonably safe surgical procedure. Most babies become
candidates for eventual univentricular/bi-ventricular repair. 相似文献