AIMTo investigate the effect of brassinolide, a plant growth modulator, on multidrug resistance (MDR) of human T lymphoblastoid cell line CCRF-VCR 1000 which was obtained by progressively addition of vincristine (VCR) to sensitive CCRF-CEM cells, and to explore preliminarily the mechanism of reversing action.

METHODSMTT method was used to detect the resistant factor of resistant cell line and the reversing fold after addition of brassinolide. The intracellular accumulation of rhodamine 123, a fluorescent dye transported by P-glycoprotein was detected by flow cytometry, the catalytic activity of topoisomerase II was assessed by Sulliven method to find the effect of brassinolide on resistance. The protein expression of p53 was measured using Western blotting in the sensitive cells and resistant cells to explore the effect of brassinolide.

RESULTSThe resistant factors of CCRF-VCR cells on adriamycin, VP-16 and VCR are respectively as 153.1, 55.9 and 8123.1 folds comparing to the sensitive cell line CCRF-CEM. After treatment of brassinolide under the concentration of 0.001 - 10.0 microg x mL(-1), the resistance of CCRF-VCR was reversed partly with the reversing folds respectively as 4.4 - 11.6. The intracellular accumulation of rhodamine 123 was significantly reduced in the resistant cells. After treatment of brassinolide, the accumulation increased, the level of fluorescent dye was situated between resistant cells and sensitive cells. No alteration of the catalytic activity of topoisomerase II was found among three groups. The level of protein expression of p53 in resistant cells was higher than that of sensitive cells. After brassinolide treatment, the expression of p53 in CCRF-VCR cells restored to the level of sensitive cells.

CONCLUSIONBrassinolide could effectively reverse the resistance of CCRF-VCR cells by inhibiting the effusion of drug transported by P-glucoprotein. To down regulate the abnormal expression of p53 maybe one of the mechanisms of reversing MDR for brassinolide.

Brassica rapa ; chemistry ; Brassinosteroids ; Cell Line, Tumor ; drug effects ; Cholestanols ; isolation & purification ; pharmacology ; Drug Resistance, Multiple ; drug effects ; Drug Resistance, Neoplasm ; drug effects ; Humans ; Leukemia, T-Cell ; metabolism ; pathology ; Plant Growth Regulators ; pharmacology ; Pollen ; chemistry ; Steroids, Heterocyclic ; isolation & purification ; pharmacology ; Tumor Suppressor Protein p53 ; metabolism

Orexin-A is a novel neuropeptide produced by neurons mainly located in lateral hypothalamic area that potently facilitates appetite and food intake. The purpose of this study was to investigate the possible change in orexin-A immunoreactivity in suckling-induced hyperphagia. By using immunohistochemistry and image analysis techniques we examined orexin-A-like immunoreactivity in a series of rat brain sections corresponding to the hypothalamus in groups of non-lactating, lactating, lactating with overnight cessation of suckling, lactating and cessation followed by resumed short-term sucklings. Long-term lactation significantly increased daily food intake on day 3 (81%) and day 11 (180%) postpartum compared to that in non-lactating postpartum rats, whereas daily food intake was significantly decreased by overnight cessation of suckling on day 11 postpartum in long-term lactating rats (45%). Moreover, long-term lactating rats on day 12 postpartum exhibited significantly greater number and higher mean staining intensity of orexin-A immunoreactive neurons than those of non-suckling postpartum rats (P<0.001 and P<0.05, respectively). Overnight cessation of lactation in rats on day 12 postpartum significantly decreased both the number and mean staining intensity of orexin-A immunoreactive neurons compared to those in long-term lactating group of rats (P<0.001 and P<0.05, respectively), similar to the levels in the non-lactating postpartum rats. Resumed lactation for 2 and 5 h after overnight cessation of lactation significantly increased the number (P<0.001 and P<0.05, respectively) and mean staining intensity (P<0.05) of orexin-A immunoreactive neurons compared to those in the rats without resumed lactation. Both long-term lactation and short-term resumed suckling enhanced orexin-A immunoreactivity in the hypothalamus in rats, and overnight cessation of lactation down-regulated the increased orexin-A immunoreactivity induced by long-term lactation. Suckling may regulate orexin-A expression in the hypothalamus and the increased orexin-A may be involved in hyperphagia in lactating rats, suggesting the possibility of the existence of some neural-humoral links between suckling and hypothalamic orexin-A-immunoreactive neurons.
Animals ; Feeding Behavior ; physiology ; Female ; Hyperphagia ; physiopathology ; Hypothalamus ; metabolism ; physiology ; Immunohistochemistry ; Intracellular Signaling Peptides and Proteins ; immunology ; metabolism ; Male ; Neurons ; metabolism ; physiology ; Neuropeptides ; immunology ; metabolism ; Neurotransmitter Agents ; immunology ; metabolism ; Orexins ; Rats ; Rats, Wistar

Objective To evaluate the clinical effect of femtosecond laser assisted cataract surgery with Toric IOL implantation on correcting astigmatism and IOL rotating stability.Methods A prospective,nonrandomized,controlled study was conducted in 68 patients (82 eyes) diagnosed as age-related cataract with more than 1.0 diopter (D) regular astigmatism,including 41 eyes undergoing Toric IOL implantation with femtosecond laser assisted cataract surgery,and the other eyes receiving Toric IOL with phacoemulsification.And observation was performed for the uncorrected visual acuity (UCVA) before operation and 6 months after operation,preoperative corneal astigmatism,anticipated and postoperative residual astigmatism 6 months after operation.Then,comparison was performed for the degree of Toric lens axis rotation,as well as the horizontal and vertical movement of the IOL and the degree of vertical deflection in the capsule at 1,3,and 6 months after operation.Results In the observation group,preoperative UCVA (logMAR),preoperative corneal astigmatism,postoperative BCVA and the residual astigmatism at 6 months after operation was 1.03 ± 0.32,(2.09 ± 0.73) D,0.13 ± 0.11 and (0.33 ± 0.27) D,respectively,while the corresponding data in the control group was 0.92 ± 0.40,(1.69 ± 0.64) D,0.13 ± 0.09,(0.26 ± 0.22) D;the postoperative visual acuity in both groups was significantly improved,and residual astigmatism was significantly decreased at 6 months after operation (all P ＜ 0.001).There was no significant difference in Toric lens axis after femtosecond laser assisted surgery and phacoemulsification at 1 month,3 months,6 months after operation (all P ＞ 0.05),but the differences in the IOL movement in horizontal and vertical direction were statistically significant at the different time-points (all P ＜ 0.05),and there was significant differences in the degree of vertical deflection (all P ＜ 0.05).Conclusion Both femtosecond laser assisted cataract surgery and phacoemulsification combined with Toric IOL can achieve a better stability and predictability.

·AIM: To study the effect and safety of sodium hyaluronate combined with loteprednol eye drops compared to pure sodium hyaluronate eye drops in the clinical treatment of dry eye in children. ·METHODS: From August 2014 to August 2016, 128 children (256 eyes) with water deficient dry eye treated with artificial tears in our hospital were randomly divided into two groups, 64 cases (128 eyes) in each, the combined group and the control group, according to the random number table method. The combined group was given sodium hyaluronate combined with loteprednol treatment;the control group was given simple treatment of sodium hyaluronate eye drops. Before and after treatment for 2 and 6wk for ocular surface analysis system (Keratograph 5M) examination, determination of tear break-up time (BUT), tear meniscus height (TMH), meibomian gland infrared photography, slit lamp observation of corneal fluorescein staining, the observation indexes were statistically analyzed. ·RESULTS: After 2wk of treatment, the TMH and BUT level of the two groups were all higher than those before treatment(P<0.05). The scores of meibomian gland score and corneal fluorescein staining were lower than those before treatment, and the difference was statistically significant (P<0.05). After 6wk of treatment, the TMH and BUT level of the two groups were all higher than those before treatment and 2wk after treatment; The meibomian gland score and scores of corneal fluorescein staining were lower than those before treatment and 2wk after treatment, the difference was statistically significant (P<0.05). After 2wk and 6wk of treatment,TMH and BUT level combined groups were higher than those in the control group, while the score of meibomian gland and corneal fluorescein staining scores were lower than those in the control group, the difference was statistically significant (P<0. 05). Intraocular pressure between the two groups before and after treatment was not significantly different (P>0.05). · CONCLUSION: Sodium hyaluronate combined with loteprednol eye drops is more effective in the clinical treatment of dry eye children than the use of sodium hyaluronate eye drops,while the safety and tolerance are better.

OBJECTIVETo evaluate the efficacy and adverse effects of transcatheter closure of perimembranous ventricular septal defect (pmVSD) with modified double-disk occluder device (MDVO).

METHODSClinical data including clinical examination, electrocardiography daily after the procedure for a week, chest-X-rays and TTE before discharge and at 3-5 days after the procedure were analyzed from 604 patients underwent percutaneous closure of a pmVSD with MDVO at our department between December 2001 and December 2008.

RESULTSProcedure was successful in 576 out of 604 patients (95.4%) and 583 VSD occluders were placed. Endocarditis, thromboembolism, or deaths were not observed after procedure. Conduction block occurred in 81 patients (56 RBBB, 14 LBBB) and transient nonparoxysmal ventricular tachycardia in 31 patients after the procedure. Complete heart block occurred in 11 patients, 9 of them recovered in 3 weeks, permanent pacemaker was implanted in 2 patients (one had transient III degrees AVB before the procedure, the other underwent simultaneous closure of ventricular septal defect and atrial septal defect). Trivial/small residual shunts were found in 69 patients (12.0%). The residual shunts disappeared in 31 patients and remained unchanged in 38 patients (6.6%) 7 days after procedures. Aortic regurgitation developed in 5 patients (2 trivial/small, 3 small/moderate), and tricuspid regurgitation was present in 35 patients (32 trivial/small, 3 moderate). Five patients developed haemolysis (device retrieved via catheter in 1 patient due to persistent haemolysis, the other 4 patients recovered 3-14 days post procedure). Pseudoaneurysm of femoral artery occurred in 1 patient, and disappeared by pressure dressing. Device was successfully replaced in 2 patients with either device embolization (n = 1) or device misplacement (n = 1) after device retrieval by catheter.

CONCLUSIONIt is safe and effective to close congenital perimembranous ventricular septal defect with domestic-made occluder device.

Adolescent ; Adult ; Aged ; Balloon Occlusion ; Cardiac Catheterization ; Child ; Child, Preschool ; Echocardiography ; Female ; Heart Septal Defects, Ventricular ; therapy ; Humans ; Infant ; Male ; Middle Aged ; Treatment Outcome ; Young Adult

Objective To investigate the intervention effect of CD147 on learning and memory ability in rat model of Alzheimer's disease. Methods A total of 60 healthy Sprague-Dawley rats were randomly divided into sham operation group, model group and CD147 group, 20 rats in each group. All of the rats were anesthetized with intraperitoneal injection of 10％chloral hydrate (0.3 g/kg). The rats in the model group and the CD147 group were injected with Aβ1-40 (10μg) in the bilateral hippocampal CA1 regions, while the rats in the sham operation group were injected with the same amount of saline at the same sites. After 48 h, the rats in CD147 group were injected with CD147 cDNA in the bilateral ventricles, while the rats in model group and sham operation group were injected the same amount of saline at the same sites. Morris water maze test was used to detect the ability of learning and memory of rats. The expressions ofβamyloid protein (Aβ) andγ-secretase were detected by Western blot assay. Results The escape latency was significantly longer in model group than that of sham operation group, while which was significantly lower in CD147 group than that of model group (P<0.05). The number of times across the platform and the time of staying on platform were significantly lower in model group than those of sham operation group, while which was significantly higher in the CD147 group than that of model group (P<0.05). The expressions of Aβandγ-secretase were increased significantly in model group compared to those of sham operation group, while which were significantly decreased in CD147 group compared with those of model group (P<0.05). Conclusion Exogenous CD147 can significantly improve the learning and memory ability of AD rats, and its specific mechanism may be related to regulating the activity ofγ-secretase and down regulating the expression of Aβ.

BACKGROUND AND PURPOSE: Five single-nucleotide polymorphisms (SNPs) (rs4379368, rs10504861, rs10915437, rs12134493 and rs13208321) were recently identified in a Western population with migraine. These migraine-associated SNPs have not been evaluated in a Han Chinese population. This study investigated the associations of specific SNPs with migraine in a Han population. METHODS: This was a case-control study of Han Chinese residing in Fujian Province. Polymerase chain reaction—restriction-fragment-length polymorphism analysis and direct sequencing were used to characterize the relationships of SNPs in a control group of 200 subjects and in a migraine group of 201 patients. RESULTS: The frequencies of the five SNPs did not differ between patients with migraine and healthy non migraine controls. However, subgroup analysis indicated certain SNPs were more strongly associated with migraine with aura or migraine without aura than with controls. The CT genotype of rs4379368 was more common in migraine patients with aura (75%) than in migraine patients without aura (47.9%) and controls (48.5%) (p<0.05), and the TT genotype of rs10504861 was more common in migraine patients with aura than in controls (8.3% vs. 0.5%) (p<0.05). Meanwhile, the CC genotype of rs12134493 was less common in migraine patients without aura than in controls (80.6% vs. 88%) (p<0.05). CONCLUSIONS: Our findings suggest that the rs4379368 and rs10504861 SNPs are markers for susceptibility to migraine with aura and that rs12134493 is a marker for the risk of migraine without aura in this Han population. Future studies should further explore if these associations vary by ethnicity.
Asian Continental Ancestry Group* ; Case-Control Studies ; Epilepsy ; Genotype ; Humans ; Migraine Disorders* ; Migraine with Aura ; Migraine without Aura ; Polymorphism, Single Nucleotide

OBJECTIVETo evaluate the correlation between thrombosis and stability of atherosclerotic plaque within criminal vessels in patients with unstable angina pectoris (UAP) by coronary angioscopy, to explore the clinical pathological basis for acute coronary syndromes (ACS).

METHODSSixty-eight patients with UAP were enrolled, the patients with post-infarction angina pectoris and variant angina pectoris were excluded. There were 48 males and 20 females, aged from 40 to 73 (average 62.4 +/- 8.6) years. The criminal vessels of there patients were observed by coronary angioscopy during percutaneous coronary intervention (PCI) therapy.

RESULTSThere were 68 criminal vessels in 68 patients. Atherosclerotic plaques were observed in all criminal vessels. Among criminal vessels, thrombi and intimae lesions were detected in 63 cases and 46 cases, respectively. Among 68 cases with atherosclerotic plaques, there were 48 cases of yellow plaques (70.5%), 18 cases of light yellow plaques (26.5%) and 2 cases of white plaques (2.94%). Sixty-three thrombi cases were mural and on-occlusive, which included 11 cases of red or mixed thrombi (17.5%) and 52 cases of white or pink thrombi (82.5%). All intimae lesions were accompanied by thrombosis, which included 11 cases of red or mixed thrombi (23.9%) and 35 cases of white or pink thrombi (76.1%).

CONCLUSIONThe study has shown that the rupture of unstable yellow plaque and its thrombosis were the pathological basis of UAP. Therefore, stabilizing yellow plaque before its rupture may play critical role in prevention and treatment of ACS.

Adult ; Aged ; Angina, Unstable ; pathology ; Angioscopy ; Coronary Artery Disease ; etiology ; pathology ; Coronary Thrombosis ; etiology ; pathology ; Female ; Humans ; Male ; Middle Aged

The recombined adenovirus DNA was transfected into 293 cells for packing and amplification of replication-deficient Ad-CMV-E6/E7, Ad-K14 -E6/E7 virus was purified by CsCl density gradient centrifugation , recombined adenovirus Ad-CMV-E6/E7, Ad-K14 -E6/E7 were used as experimental group, while pAd-CMV and pAdtrack-K14 were used as control group. Four of them were injected through one main vein of nude mice tail respectively. These mice were then treated with 0.05 mg 17beta-estradiol over 12 weeks. Mice were anaesthesiaed with 2.5% Avertint and the vagina, mammary gland, ovaries and uterus were dissected and fixed in 3.75% paraformaldehyde overnight at 4 degrees C. Paraffin-embedded sections, HE staining and identification of P53 and Bcl-2 protein via immunohistochemistry were performed. The expression of E6/E7 was verified by RT-PCR in different tissue of nude mice. HE staining showed evident hyperplasy in cervix-uterus transformation zone of experimental group 2. The expression of mutant P53 and Bcl-2 were higher than control group via immunohistochemical S-P method in uterus stroma-cell. Western blotting also showed that E6 protein was expressed. The expression of E6/E7 was higher than control group by human cytokeratin promoter 14 and hyperlasy changes were detected in epithelial tissue of cervix-uterus transformation zone.
Adenoviridae ; genetics ; Animals ; Blotting, Western ; Cell Line ; Female ; Genital Diseases, Female ; pathology ; virology ; Genitalia, Female ; pathology ; virology ; Humans ; Immunohistochemistry ; Mammary Glands, Animal ; metabolism ; pathology ; Mice ; Mice, Nude ; Oncogene Proteins, Viral ; genetics ; metabolism ; Ovary ; metabolism ; pathology ; Papillomaviridae ; metabolism ; physiology ; Papillomavirus E7 Proteins ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Repressor Proteins ; genetics ; metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Tumor Suppressor Protein p53 ; metabolism ; Uterus ; metabolism ; pathology ; Vagina ; metabolism ; pathology

To gain more insights into epidemiologic characteristics and genotype of hantavirus in Apodemus agrarius in Changbai Area. Complete hantavirus S segment sequences were amplified by RT-PCR and sequenced. The phylogenetic trees were constructed for analysis of genetic characters of hantavirus. A total of 58 Apodemus agrarius were trapped in the epidemic areas, and complete hantavirus S segment sequences were obtained from 4 lung samples of these rodents (6. 90%0). Phylogenetic analysis of the four S segment sequences indicated that all viruses isolated from Apodemu sagrarius were closely related to genotype 6 of Hantaan virus (95. 8%-96. 3%, nucleotide identity; 98. 6%-99. 5%, amino acid identity), all of them had a specific S387 different from other genotypes of Hantaan virus.
Animals ; Base Sequence ; China ; epidemiology ; DNA, Complementary ; chemistry ; genetics ; Disease Reservoirs ; virology ; Genotype ; Hantavirus ; classification ; genetics ; isolation & purification ; Hantavirus Infections ; epidemiology ; veterinary ; virology ; Lung ; virology ; Murinae ; virology ; Phylogeny ; RNA, Viral ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Rodent Diseases ; virology ; Sequence Analysis, DNA ; Viral Proteins ; genetics