Bacterial Infections ; drug therapy ; metabolism ; Biomarkers ; analysis ; Clinical Trials as Topic ; Humans ; Infant, Newborn ; Neonatology ; Research Report

Both with the advantages of fixed and removable dentures,the attachment prostheses is an important component of prosthodontics.At present,the resin base for the removable part of attachment denture was majorly made with traditional methods such as cartoning,resin-filling,heat treatment.But the produced fixed part of attachment denture was easy to be deformed or broken off during such processes.Here a method were introduced to produce resin base with injection moulding,which could avoid the occurrence of the mistakes of traditional methods and simplify the process.

Objective:To develop a novelty retrieval management system to meet actual demands of military medical sci-tech novelty retrieval. Methods:Delphi 7.0, Access 2000 and SQL Server 2000 were employed as the developmental platform to realize the system functions.Results and Conclusion:The military medical sci-tech novelty retrieval management system can exercise overall management and improve the quality and efficiency of novelty retrieval, which will provide information and decision assistance for management of medical researches.

Objective To investigate expression level of endoplasmic reticulum stressmarker GRP78 in the testicular tissue in rats with different phases of morphine-dependence. To explore the role of ERS in morphine-de-pendence. Methods SD rats were divided into 6 groups: morphine (mor) -withdrawal group, mor-extinct group, mor-kindling group and their control groups, normal saline (NS)-withdrawal group, NS-extinct group, NS-kindling group. The experimental rats were injected with morphine subcutaneously on increasing dosage to establish the con-ditioned place preference (CPP) model. The rats in control groups were injected NS. Then the rats were suffered from withdrawal for 48 h, extinction and kindling by morphine, separately. The GRP78 expression level in testicular tissues of rats in the time point mentioned above were measured using Western Blot. Results The time of rats in the paired-box was (528.0 ± 81.0) s, which was significantly higher than that in the NS control group (P<0.001). It was (396.8 ± 116.9) s after extinctive phase, which was significantly higher than that the withdrawal phase of rats (P < 0.001). Also it was (396.8 ± 116.9) s after kindling with morphine which was significantly higher than that the extinctive phase of rats (P < 0.001). These changes of the time indicated that the animal models of extinction and kindling were established in the study. The GRP78 levels were down-regulated in 48 h after withdrawal (P <0.05), and increased a bit afterextinctive phase, but up-regulated highly after kindling with morphine (P < 0.01). Conclusion ERS may be related in the morphine dependence and it might play an important role of testicular dys-function in male drugabuser.

The present study aims to investigate the kinetic histocytochemical changes of acupoints in different condition. The expression of tryptase (+) mast cells, histamine (HA) , serotonin (5-HT) and nociceptive neuropeptides including calcitonin gene-related peptide (CGRP) and substance P (SP) were observed by immunohistochemistry combined with confocal technology. Mast cells were labeled with anti-mast cell tryptase antibody and simultaneously with HA or 5-HT primary antibodies to observe their co-expression. The results showed that: (1) SP and CGRP were expressed more highly on the cutaneous nerve fibers of "Hegu" (LI 4) after acupuncture stimulation than that of the control. Mast cells aggregated in close proximity to the blood vessels in intra-epidermis and dermis, and some of them with degranulation in the lower dermis and subcutaneous tissue of "Hegu" (LI 4). Both mast cells and their granules appeared with HA (+) and 5-HT (+) expression at stimulated LI 4 sites, while a few intact mast cells with a little expression of 5-HT and HA were distributed in areas of non-stimulated Ll 4. (2) The acupoints in different locations such as Baihui (GV 20), Weishu (BL 21), Zhongwan (CV 12) and LI 4 had the same constituent but the contents were different. (3) The histocytochemical responses of acupoints sensitized by the Gastric mucosa injury (GMI) were also investigated. GMI resulted in neurogenic plasma extravasation by Evans Blue (EB) in the skin of the acupoints over the back and abdomen, which mostly occurred in the T9-T11 dermatomere. The EB extravasation dots just like acupoints sensitization appeared after GMI and disappeared gradually during the natural self-recovery of the gastric mucosa. More SP and CGRP positive nerve fibers were distributed in EB dots than in regions beside EB dots and in the control, mostly distributed in the nerve fibers around both the vessels and root of hair follicle. Mast cells also aggregated and degranulated to release algogenic substances of 5-HT and HA around the vessels in areas of the EB dots. Collectively the acupoints displayed the same histocytochemical responses due to either acupuncture stimulation or GMI. This may potentially be the histocytochemical basis in the local acupoints and acupoints displayed kinetic changes in different condition.
Acupuncture Points ; Acupuncture Therapy ; Animals ; Calcitonin Gene-Related Peptide ; metabolism ; Gastric Mucosa ; chemistry ; metabolism ; Histocytochemistry ; Humans ; Mast Cells ; chemistry ; metabolism ; Mice ; Rats ; Serotonin ; metabolism ; Skin ; chemistry ; metabolism ; Substance P ; metabolism

Aluminum ; toxicity ; Animals ; Animals, Newborn ; Calcium ; metabolism ; Cerebral Cortex ; drug effects ; metabolism ; Dose-Response Relationship, Drug ; Female ; Male ; Rats ; Rats, Wistar

Objective To dynamically investigate the effects of aluminum on the concentration of free intracellular Ca2+([Ca2+]i) and the expression of calcium channels in the hippocampus of rats. Methods Healthy 64 Wistar rats were taken as the experimental objects. And these rats were randomly divided into 16 groups according to their weights, and were instilled with AlCl3 at 0(control),37.3,74.7 and 248.7 mg/kg respectively. The experimental time exposed to AlCl3 was 45,75,120 d, among which the rats were given AlCl3 for 120 d fed normally for 30 d. The hippoeampus were segregated on day 45,75,120 and 150 d and the[Ca2+]i of hippocampus of rats were detected by fluorospectrophotometer. The expression of Ryanodine receptor 2 (RyR2) mRNA and α1C ubunit of L-type calcium ehannels(L-Ca2+α1C) mRNA were detected by RT-PCR analysis. Results [Ca2+]i was increased by AlCl3 in a dose-and time-dependant manner(F=23.136 and 19.089, P<0.01). There was a synergistic effect between the dose and time in [Ca2+]i (F=2.270, P<0.05). In time of 120,150 days, the [Ca2+]i of rats hippocampus in 37.3[(299.3±48.7), (342.7±35.3)nmol/L], 74.7[(391.2±47.9), (408.1±42.8)nmol/L] and 248.7 mg/kg group[(397.9±55.8), (405.2±22.7)nmol/L] significantly increased compared with control group [(195.1±29.9), (209.1±30.6)nmol/L; P<0.01]. The expression of RyR2 mRNA and L-Ca2+α1C mRNA were increased by AlCl3(F=23.301 and 60.812, P<0.01). The experimental time could lower the expression of L-Ca2+ α1C mRNA (F=6.088, P<0.01), but had no influences on the expression of RyR2 mR NA (F=1.361, P>0.05). There was interaction between the dose of AlCl3 and the time in the expression of L-Ca2+α1C mRNA (F=5.876,P< 0.01). On day 75,120 and 150 of the experiment, the expression of L-Ca2+α1C mRNA in rat hippocampus of 74.7 (1.03±0.16,1.18±0.18,0.92±0.11) and 248.7 mg/kg group(1.89±0.26, 1.25±0.10, 1.07±0.14) also increased compared with control group(0.63±0.09,0.78±0.16,0.69±0.11; P<0.05 or <0.01). On day 45,75, 120 and 150 of the experiment, the expression of RyR2 mRNA in 74.7(0.49±0.06,0.51±0.07,0.57±0.11, 0.47±0.11), 248.7(0.47±0.03,0.52±0.09, 0.70±0.10, 0.78±0.09)mg/kg AlCl3 groups was highly increased compared with control group (0.24±0.07, 0.32±0.04, 0.30±0.06, 0.27±0.06; P<0.05 or<0.01). Conclusion Al increases [Ca2+]i by increasing the expression of the RyR2 mRNA and L-Ca2+α1C mRNA, thus exerts an irreversible neuronal toxicity.

OBJECTIVESTo study the effect of HAART on subsets of T lymphocytes and expression of CD127 on memory and naїve CD4(+) and CD8(+)T cells in pediatric AIDS patients with different viral loads receiving HAART.

METHODA cross- sectional study on 194 pediatric AIDS patients receiving HAART was carried out and 52 age matched healthy children were recruited as controls. The percentage of CD4(+), CD8(+), CD8(+)CD45RA(+)CD127(+/-), CD8(+)CD45RO(+)CD127(+/-), CD4(+)CD45RA(+)CD127(+/-) and CD4(+)CD45RO(+)CD127(+/-)T cells was tested using flow cytometry, and HIV-RNA in plasma was detected by quantitative RT-PCR.

RESULTThe percentage of memory (CD45RO(+)) CD4(+)T cells decreased to (45.73 ± 8.85)%, and that of naїve (CD45RA(+)) CD4(+) and memory CD8(+)T increased to (60.44 ± 5.01)% and (54.69 ± 7.71) % respectively in the pediatric AIDS patients vs. controls (P < 0.05). The percentage of naїve (CD45RA(+)) CD4(+)T cells of patients with viral load (VL) < 400 copies/ml was (65.57 ± 5.33) %, which was significantly higher than that of patients with VL ≥ 400 copies/ml (P < 0.05).Of patients with VL < 400 copies/ml, the percentage of CD4(+)CD127(+)T cells, especially the subset of memory CD4(+)CD127(+)T cells was (82.35 ± 2.31)%, which was higher than that of patients with VL ≥ 400 copies/ml, but lower than that of controls (P < 0.05). The percentage of memory and naїve CD8(+)CD127(+)T cells was lower than that of controls (P < 0.05).

CONCLUSIONThe recovery of CD4(+)T cell subsets in pediatric AIDS patients is associated with viral load. Effective HAART can increase the percentage of naїve CD4(+)T cells and the life of memory CD4(+)T cells.

Acquired Immunodeficiency Syndrome ; drug therapy ; immunology ; virology ; Adolescent ; Antiretroviral Therapy, Highly Active ; CD4-Positive T-Lymphocytes ; immunology ; CD8-Positive T-Lymphocytes ; immunology ; Child ; Cross-Sectional Studies ; Female ; Flow Cytometry ; Humans ; Immunologic Memory ; Interleukin-7 Receptor alpha Subunit ; immunology ; metabolism ; Lymphocyte Count ; Male ; Reverse Transcriptase Polymerase Chain Reaction ; T-Lymphocyte Subsets ; immunology ; Viral Load

Agroinfiltration is a newly developed plant transient gene expression technique, which is simple, rapid and reproducible. It has been widely used in analyses of foreign gene expression, hypersensitive reaction, gene silencing, promoter activity and identification of new disease-resistance genes. In this paper, we describe the principle and the operation procedure of Agroinfiltration and its application in diverse aspects of plant molecular biology research. Our experiences in modification of the Agroinfiltration technique are also provided.
Agrobacterium tumefaciens ; genetics ; Genetic Vectors ; genetics ; Plants ; genetics ; Plants, Genetically Modified ; Research Design

Objective To evaluate the diagnostic values of MSCT for detecting atherosclerotic plaques on New Zealand rabbits models in comparison with pathologic results. Methods Fifteen New Zealand rabbits were enrolled in this study, including 5 with balloon injury and high-fat diet ( group A), 5 with high-fat diet only (group B) and 5 with regular feed (group C). 16th week late, contrast-enhanced MSCT scan was performed in all rabbits with 16 slice MSCT (16-MSCT) in group A and 64 slice MSCT (64-MSCT) in group B and C. The CT and pathological findings were compared in a double-blind manner. The sensitivities and specificities of 16-MSCT and 64-MSCT for detecting atherosclerotic plaques were evaluated by using Fisher test and x2 test. Results Sixty and seventy-five images on 16-MSCT and 64-MSCT had corresponding pathological slices. The sensitivities for the detection of plaques on 16-MSCT and 64-MSCT were 41.5% (22/53) and 64. 9% (24/37), and spocificities of 85. 7% (6/7) and 89. 5% (34/38), respectively. Conclusions 64-MSCT has a higher sensitivity in the detection of atherosclerotic plaques than 16-MSCT. Both scanners can be used to preclude the diagnosis of atherosclerosis.