Adult ; Aneurysm, Dissecting ; complications ; pathology ; Anterior Wall Myocardial Infarction ; etiology ; Aortic Aneurysm, Thoracic ; complications ; Humans ; Male

ObjectiveTo explore the renal functions of vasopressin-deficient Brattleboro(BB) rats by using different concentrated Gadolinium-diethylenetetramine pentaacetic acid(Gd-DTPA) dynamic enhanced magnetic resonance imaging(MRI).MethodsThe study included 14 BB rats(male rats of 3 month-old) and 14 normal male Wistar rats used as control group.Dynamic MRI was performed by using either a low dosage(0.05 mmol/kg) or a high dosage of Gd-DTPA(0.5 mmol/kg).Data of 0-60 min renal cortex,medulla and pelvic were obtained after using contrast medium.MRI of kidneys at different time was analyzed and the mean relative signal intensity(RSI) was measured.Then the RSI curves of different groups were marked.Data of each group were caculated separately by SPSS 11.0 software.ResultsThe findings demonstrated that RSI curves of the vasopressin-deficient kidneys showed different patterns as compared with those of the control group(P

Forearm ; innervation ; Ganglion Cysts ; surgery ; Humans ; Male ; Middle Aged ; Muscle, Skeletal ; innervation ; surgery ; Tendons ; surgery ; Ulnar Nerve ; surgery

Robust and efficient control of therapeutic gene expression is needed for timing and dosing of gene therapy drugs in clinical applications. Ribozyme riboswitch provides a promising building block for ligand-controlled gene-regulatory system, based on its property that exhibits tunable gene regulation, design modularity, and target specificity. Ribozyme riboswitch can be used in various gene delivery vectors. In recent years, there have been breakthroughs in extending ribozyme riboswitch's application from gene-expression control to cellular function and fate control. High throughput screening platforms were established, that allow not only rapid optimization of ribozyme riboswitch in a microbial host, but also straightforward transfer of selected devices exhibiting desired activities to mammalian cell lines in a predictable manner. Mathematical models were employed successfully to explore the performance of ribozyme riboswitch quantitively and its rational design predictably. However, to progress toward gene therapy relevant applications, both precision rational design of regulatory circuits and the biocompatibility of regulatory ligand are still of crucial importance.
Animals ; Cell Line ; Gene Expression ; Gene Expression Regulation ; Genetic Therapy ; Humans ; Ligands ; Models, Theoretical ; RNA, Catalytic ; genetics ; Riboswitch ; genetics

Objective To investigate the effect of propofol on nNOS expression after focal cerebral ischemia-reperfusion in rats and the possible mechanism of protective effect of propofol on brain. Method Seventy-eight male Wistar rats, weighting 250 ~ 300 g, were randomly divided into 3 groups:(1)Sham operation group (S group, n=6) was performed with scham operation; (2) Ischemia-reperfusion group (group I-R, n=36) was subjected to 2-hour right middle cerebral artery occlusion and then reperfusion was followed, saline (1 mg/kg) was injected into the right lateral cerebral ventricle using microsyringe before reperfusion;(3) Propefol group (group P, n=36) was injected with propofol (1mg/kg) into the right lateral cerebral ventricle using microsyringe right after ischemia. Group I-R and group P were divided into 3 subgroups according to the reperfusion time: 1 h, 3 h and 6 h. The neurological function of all rats were tested before reperfusion. The cerebral infarction area of the whole brain was calculated with TIC staining (n=6). The pathological change of brain was observed from HE staining (n=6) and the nNOS protein expression was obtained by immuno- histochemical method (n=6). Results Compared with I-R group, the neurological function was better in group P(P

No abstract available.
Asian Continental Ancestry Group* ; Ectodermal Dysplasia 1, Anhidrotic* ; Humans

The performance of extremely low-frequency electromagnetic fields (ELEF) can change the response of osteoblasts. In this study a kind of ELEF stimulator, which can radiate sinusoidal, rectangular, triangular and pulsed burst ELEF with frequency of 0-300 Hz and strength of 0-40 mT was developed. The neonatal rat calvarial osteoblasts were treated with the device. The effects of various ELEF stimulation on the osteoblast were evaluated by its proliferation and differentiation. The results demonstrated that rectangular and pulsed burst radiation (15Hz, 5mT) can positively change the proliferation of the osteoblast and inhibit its differentiation, but the sinusoidal one can significantly enhance its differentiation and decrease its proliferation.
Animals ; Animals, Newborn ; Cell Differentiation ; radiation effects ; Cell Proliferation ; radiation effects ; Cells, Cultured ; Electromagnetic Fields ; Osteoblasts ; cytology ; radiation effects ; Rats ; Rats, Sprague-Dawley ; Skull ; cytology

On account of the dense cuticles of the fresh stem and the light, hard and pliable texture of the dried stem, Dendrobii Caulis is difficult to dry or pulverize. So, it is very important to the ancient doctors that Dendrobii Caulis should be properly treated and applied to keep or evoke its medicinal effects. The current textual research results about the preliminary processing, processing and usage methods of Dendrobii Caulis showed that: (1) In history the clinical use of fresh or processed Dendrobii Caulis as teas and tinctures were very common. (2) Its roots and rhizomes would be removed before using. (3) Some ancillary approaches were applied to shorten drying times, such as rinsing with boiling mulberry-ash soup, washing or soaking with liquor, mixing with rice pulp and then basking, etc. (4) According to the ancients knowledge, the sufficient pulverization, by means of slicing, rasping, hitting or pestling techniques, was necessary for Dendrobii Caulis to take its effects. (5) The heat processing methods for Dendrobii Caulis included stir-baking, stir-frying, steaming, decocting and stewing techniques, usually with liquor as an auxiliary material. Among above mentioned, steaming by pretreating with liquor was most commonly used, and this scheme was colorfully drawn in Bu Yi Lei Gong Pao Zhi Bian Lan (Ming Dynasty, 1591 CE) ; moreover, decocting in advance or long-time simmering so as to prepare paste products were recommended in the Qing Dynasty. (6) Some different processing programs involving stir-baking with grit, air-tightly baking with ondol (Kangs), fumigating with sulfur, which appeared in modern times and brought attractive outward appearance of the drug, went against ancients original intentions of ensuring drug efficacy.
Dendrobium ; History, Ancient ; Medicine, Chinese Traditional ; history ; Technology, Pharmaceutical ; history

This study was aimed to investigate the expressions of genes hoxb2 and hoxb4 after interference of the proliferation and differentiation of hematopoietic stem cells (HSC) to the erythroid progenitors (CFU-E) in vitro by using all-trans retinoic acid (ATRA). The cord blood was collected from 12 cases of fetal placenta umbilical vein and cultured by using culture technique of HSC in vitro. The proliferation and differentiation of HSC to CFU-E were interfered with 6 x 10(-8) mol/L of ATRA. The expression levels of genes hoxb2 and hoxb4 in blank control and ATRA groups were detected by FQ-RT-PCR on day 3, 7 and 10 of culture. The results showed that the expressions of genes Hoxb2 and hoxb4 were a little on day 3, obviously increased on day 7 and reached highest level on day 10 in 2 groups. The expression level of hoxb4 on day 3, 7 and 10 in blank control group was obviously higher than expression level of hoxb2. As compared with blank control group, the expressions of genes hoxb2 and hoxb4 in the ATRA group were significantly up-regulated. It is concluded that the genes hoxb2 and hoxb4 all expressed in process of proliferation and differentiation to erythroid progenitors, which suggests that hoxb2 and hoxb4 relate to erythroid hematopoiesis, and the hoxb4 has more great relevance to erythroid hematopoiesis as compared with hoxb2. The ATRA (6 x 10(-8) mol/L) can up-regulate the expression of hoxb2 and hoxb4 significantly.
Cells, Cultured ; Female ; Fetal Blood ; cytology ; Gene Expression ; drug effects ; Hematopoietic Stem Cells ; drug effects ; Homeodomain Proteins ; genetics ; Humans ; Pregnancy ; Transcription Factors ; genetics ; Tretinoin ; pharmacology

A simple and cost-effective indirect competitive enzyme-linked immune sorbent assay (ic-ELISA) was developed to rapidly screen the content of aflatoxin B1 (AFB1) in lotus seeds, and the results were confirmed by ultra-fast liquid chromatography-tandem mass spectrometry( UFLC-MS/MS). Matrix-matched calibration expressed a good linearity ranging from 0. 171 to 7. 25 µg · L(-1) for AFB, with R2 > 0.978. The medium inhibitory concentration( IC50 ) for AFB1 was 1.29 µg · L(-1), the recovery for AFB1 was 74.73% to 126.9% with RSD < 5%, and the limit of detection (IC10) was 0.128 µg · L(-1). The developed ic-ELSIA method was applied to rapid analysis of AFB, in 20 lotus seeds samples and the results indicated that the contents of AFB, in samples 1-15 were in the range of 1. 19- 115. 3 µg · kg(-1) and in 40% of the samples exceeded the legal limit(5 µg · kg(-1)), while the contamination rate of AFB, in samples 16-20 was 40%. Pearson correlation coefficient(r) reached 0.997 for AFB1 content in the samples detected by ic-ELSIA and UFLC-MS/MS methods. The results proved that the developed ic-ELISA method is simple, sensitive and reliable, and can be used for rapid and high-throughput screening of AFB1 in lotus seeds
Aflatoxin B1 ; analysis ; Drug Contamination ; Enzyme-Linked Immunosorbent Assay ; methods ; Loteae ; chemistry ; Seeds ; chemistry