Patients with CHF and depression have greater risk of mortality and morbidity than patients without depression.
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Depressive Disorder↗
Biomedical subjects
Wei Jiang
Publications and source records attributed to Wei Jiang.
GATA-6 transcriptional regulation of 15-lipoxygenase-1 during NSAID-induced apoptosis in colorectal cancer cells.
The mechanisms by which nonsteroidal anti-inflammatory drugs (NSAIDs) induce apoptosis in colorectal cancer cells are undergoing intensive investigation. We found previously that NSAIDs induce apoptosis in these cells by restoring 15-lipoxygenase-1 (15-LOX-1) expression. The present study examined the NSAID mechanism for up-regulating 15-LOX-1 in two colorectal cancer cell lines (RKO and DLD-1). We found that NSAID effects on 15-LOX-1 occurred at the level of transcriptional regulation. We then studied NSAID effects on GATA-6, a transcription factor that suppresses 15-LOX-1 expression. Beginning within 4 h, NSAIDs progressively down-regulated GATA-6 expression. Ectopic GATA-6 expression blocked NSAID induction of 15-LOX-1 and apoptosis. NSAIDs down-regulate GATA-6 to transcriptionally up-regulate 15-LOX-1 and induce apoptosis in colorectal cancer cells.
Anti-Inflammatory Agents, Non-Steroidal↗
A novel splice site mutation in collagen type VII gene in a Chinese family with dominant dystrophic epidermolysis bullosa pruriginosa.
Dystrophic epidermolysis bullosa pruriginosa, a subtype of epidermolysis bullosa dystrophica and a heterogeneous inherited disease, is characterized by pruritus, excoriated nodular prurigo-like lesions, skin fragility, altered anchoring fibrils and loss of dermal-epidermal adhesion. Mutation in type VII collagen gene (COL7A1) is thought to be implicated in the underlying change for dystrophic epidermolysis bullosa pruriginosa. We report here a large family of dominant dystrophic epidermolysis bullosa pruriginosa. Mutation analysis using polymerase chain reaction and direct sequencing demonstrated a novel nucleotide substitution of 6899A-->G in exon 87 in one COL7A1 allele of the proband and 18 affected family members. This substitution was not found in 100 normal alleles. Polymerase chain reaction and sequencing of the cDNA, reverse transcribed from the proband's peripheral lymphocyte RNA, suggest that this mutation causes aberrant COL7A1 mRNA splicing of exon 87 skipping. Clinical features and pedigree analysis suggest that 6899A-->G substitution is a mutation with full penetrance and variable expressivity.
Adolescent↗
Visible absorption spectra of the 4f electron transitions of neodymium, praseodymium, holmium and erbium complexes with fleroxacin and their analytical application.
The absorption spectra of the 4f electron transitions of neodymium, praseodymium, holmium and erbium complexes with fleroxacin in the presence of cetylpyridinium chloride were studied by normal and derivative spectrophotometry. Their molar absorptivity at the maximum absorption bands are about 5.3 (at 571 nm) times greater for neodymium, 2.8 (at 483 nm) times greater for praseodymium, 12.6 (at 448.5 nm) times greater for holmium and 9.7 (at 519 nm) times greater for erbium than those in the absence of complexing agents. The second-derivative spectrum is used both to eliminate the interference from other rare earths and to improve the sensitivity. Beer's law is obeyed from 3.0 - 70 microg ml(-1) for neodymium and holmium, from 6.0 - 70 microg ml(-1) for erbium, and from 12.0 - 70 microg ml(-1) for praseodymium. The relative standard deviations are 1.9% and 1.5% for 7.5 microg ml(-1) of neodymium and holmium, and 2.1% and 1.6% for 15.0 microg ml(-1) of praseodymium and erbium, respectively. Their detection limits (signal-to-noise ratio = 2) are 3.2 microg ml(-1), 1.3 microg ml(-1), (1.1) microg ml(-1) and 2.5 microg ml(-1) for praseodymium, neodymium, holmium and erbium, respectively. A new system for the simultaneous determinations of the praseodymium, neodymium, holmium and erbium in rare earth mixtures with good accuracy and selectivity is proposed.
Journal Article↗
Depression and heart disease: evidence of a link, and its therapeutic implications.
Over several decades, a large body of evidence has emerged to suggest that depressive disorder is a risk factor for heart diseases, both aetiologically and prognostically. Several large, prospective, longitudinal studies have examined the relationship between depression and the development of coronary artery disease (CAD); they reveal that the relationship is significant and independent of conventional risk factors. Prognostic studies have shown that depression is associated with two to three times higher mortality after myocardial infarction, unstable angina or coronary artery bypass grafting, and in patients with stable CAD compared with such patients without depression. Depression also has been found to increase mortality and morbidity in patients with heart failure, regardless of its aetiology. Such adverse associations persist after adjustment for conventional prognostic risk factors. Despite all of these findings, depressed patients with heart disease are less likely to be recognised clinically as being depressed than those patients who have depression but no heart disease. The very limited evidence available from pharmacological clinical trials raises concern about the safety of antidepressants in CAD and heart failure. In addition, no research has addressed whether the treatment of depression in patients with heart disease will improve their prognosis.
Coronary Disease↗
Nuclear receptor agonists as potential differentiation therapy agents for human osteosarcoma.
PURPOSE: This study was designed to investigate whether nuclear receptor agonists can be used as potential differentiation therapy agents for human osteosarcoma. EXPERIMENTAL DESIGN: Four osteosarcoma cell lines (143B, MNNG/HOS, MG-63, and TE-85) were treated with proliferator-activated receptor (PPAR)gamma agonists, troglitazone and ciglitazone, and a retinoid X receptor (RXR) ligand, 9-cis retinoic acid. The proliferation and induction of apoptosis in the treated cells were assessed, as was the induction of alkaline phosphatase, a differentiation marker of osteoblasts. RESULTS: The expression of PPARgamma was readily detected in all tested osteosarcoma lines. On treatment with the PPARgamma and RXR ligands, all four osteosarcoma lines exhibited a significantly reduced proliferation rate and cell viability. Among the four lines, 143B and MNNG/HOS were shown to be more sensitive to ligand-induced apoptosis, as demonstrated by the Crystal Violet and Hoechst staining assays. Of the three tested ligands, troglitazone was shown to be the most effective in inducing cell death, followed by 9-cis retinoic acid. Moreover, a strong synergistic effect on the induction of cell death was observed when both troglitazone and 9-cis retinoic acid or ciglitazone and 9-cis retinoic acid were administered to osteosarcoma cells. Troglitazone was shown to effectively induce alkaline phosphatase activity, a well-characterized hallmark for osteoblastic differentiation. CONCLUSIONS: Our findings suggest that PPARgamma and/or RXR ligands may be used as efficacious adjuvant therapeutic agents for primary osteosarcoma, as well as potential chemopreventive agents for preventing the recurrence and metastasis of osteosarcoma after the surgical removal of the primary tumors.
Alitretinoin↗
[Clinical and pathological characteristics of primary biliary cirrhosis].
OBJECTIVE: In order to improve the cognition and early diagnosis of primary biliary cirrhosis (PBC), we investigated clinical and pathological characteristics of PBC. METHODS: Clinical data of 37 PBC patients together with pathological findings of 20 PBC patients were reviewed. RESULTS: Among the 37 patients, 35 were women and the mean age at diagnosis was (53.4 8.9) years. The most frequent clinical presentations were jaundice (70.3%), fatigue (70.3%), and pruritus (56.8%). Serum glutamyl transpeptidase (GGT) and alkaline phosphatase (ALP) levels were markedly elevated in all patients (P50 was 467.50 U/L and 424.00 U/L, respectively). Among the 37 cases, 35 (94.6%) had total bile acids elevation, 32 (86.5%) had serum cholesterol elevation and 32 (86.5%) serum IgM elevation, 34 (91.9%) were positive for anti-mitochondrial antibody (AMA) and/or AMA-M2. Liver biopsy in 20 PBC patients mainly found: fibrosis in 17 cases (85%), interlobular bile duct lesions in 13 (65%), lobular mononuclear inflammation in 13 (65%), lymphocytic hepatocellular piecemeal necrosis in 10 (50%), and bile pigment accumulation in 9 (45%). The results of nonparametric test showed that GGT was related with pathological stage (P=0.002) and interlobular bile duct lesions (P=0.01). CONCLUSIONS: PBC is mostly found in middle-aged women. Accurate and prompt diagnosis of PBC should be based on the clinical presentation, biochemical and immunological indexes, and hepatic pathological changes. The level of GGT may partly reflect the severity of the histological lesions
Bile Acids and Salts↗
[The relationship between use of the antibiotics in a burn unit and the change of the drug-resistance of Staphylococcus aureus].
OBJECTIVE: To investigate the relationship between the use of antibiotics in a burn unit and the change in the drug - resistance of Staphylococcus aureus (S. aureus). METHODS: By calculating the defined daily doses (DDD) of accumulated consumption of antibiotics per unit time and expense consumption, the use of different kinds of antibiotics in a burn unit in recent five years was analyzed, and correlation analysis between the change of antibiotics consumption amount and the change in drug - resistance level of S. aureus were carried out. RESULTS: Amikacin, gentamycin and cephazolin were the commonest antibiotics used in our burn unit. They were relatively cheaper than some other antibiotics. The consumption amount of compound antibiotics application was negatively correlated with the penicillin resistance level of S. aureus. Seven correlation coefficients between the consumption of first generation cephalosporins and seven coefficiences of resistance rate of S. aureus were negative. The consumption amount of the 3rd generation of cephalosporin application was positively related to the resistance of S. aureus to erythromycin and oxacillin. CONCLUSION: Accumulated DDD might be one of the ideal indices of reflecting antibiotic use. The changes in the consumption amount of the 1st and 3rd generation of cephalosporins containing beta-lactamase-inhibitor might affect the drug-resistance levels of S. aureus to some degree.
Anti-Bacterial Agents↗
[Application of decalcified dental matrix in bone reparation].
OBJECTIVE: To investigate the effect of decalicified dental matrix (DDM) on healing of traumatic fracture and its side-effect. METHODS: From June 1997 to December 1998, 42 patients with closed traumatic long bone fracture (36 males and 6 females, aged from 18 to 57 years with an average of 32 years) were divided into two groups randomly; open reduction and internal fixation were carried out in all patients, but the DDM was used only in experimental group. After operation, the body temperature, ALT, and bone union time were observed and recorded. RESULTS: Following-up 1 to 3 years, the bone union time of experimental group was significantly shorter than that of control group (P < 0.01), there was no significant difference in the temperature and ALT changes between two groups(P > 0.05). No infection occurred. CONCLUSION: DDM can promote the growth of bony callus and enhance the healing of fracture. There is no side-effect.
Adolescent↗
[Application of laser scanner co-focal microscopy in researches of traditional Chinese medicine].
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Animals↗
[Clinical and experimental study on jiangzhi tiaoya granule in treating essential hypertension and protecting function of vascular endothelium].
OBJECTIVE: To observe the therapeutic effect of Jiangzhi Tiaoya Granule (JZTYG) in treating essential hypertension and its protection on function of vascular endothelial cells (VEC). METHODS: Fifty-nine patients of essential hypertension divided into two groups were treated with JZTYG (the treated group) and Jinjia Yixintong (the control group) respectively. The changes of symptoms, signs, blood pressure, heart rate were observed and the levels of endothelin (ET), calcitonin gene related peptide (CGRP) content were determined by radioimmunoassay (RIA). RESULTS: The total effective rates of JZTYG in lowering blood pressure and improving symptoms were both 90.0%, markedly effective rate in lowering blood pressure and improving symptoms was 36.7% and 60.0% respectively. The symptom improved in the treated group was better than that in the control group (P < 0.05). It also could reduce the plasma ET level (P < 0.05) and ET/CGRP ratio (P < 0.01), and increase the CGRP level (P < 0.05). CONCLUSION: JZTYG has a promising clinical therapeutic effect in treating essential hypertension and is able to protect the VEC function.
Adult↗
The Cold Box stem-loop proximal to the 5'-end of the Escherichia coli cspA gene stabilizes its mRNA at low temperature.
The 5'-end region of cspA mRNA contains a Cold Box sequence conserved among several cold-shock mRNAs. This region forms a stable stem-loop structure followed by an AU-rich sequence. Here we show that the Cold Box region is essential for the normal scale of cspA mRNA induction after cold shock because a deletion of the stem-loop significantly destabilizes the mRNA and reduces the cold shock-induced cspA mRNA amount by approximately 50%. The AU-rich track, however, slightly destabilizes the mRNA. The integrity of the stem is essential for the stabilizing function, whereas that of the loop sequence is less important. Overexpression of a mutant cspA mRNA devoid of both the AUG initiation codon and the coding sequence results in a severe growth inhibition at low temperature along with a derepression of the chromosomal cspA expression. Furthermore, the overexpressed RNA is stably associated with the 30 S and 70 S ribosomes. Our results demonstrate that the AUG initiation codon and the coding region containing the downstream box are not required for cspA mRNA to bind ribosomes and that the 5'-untranslated region by itself has a remarkable affinity to ribosomes at low temperature.
5' Untranslated Regions↗
Stereotactic conformal radiotherapy of hepatic metastases:clinical analysis of 8 cases.
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Journal Article↗
Carboracycles: Macrocyclic Compounds Composed of Carborane Icosahedra Linked by Organic Bridging Groups.
A family of macrocyclic compounds are described, together with their precursors. These cycles are composed of icosahedral carboranes linked via their carbon vertices through 1,3-trimethylene, alpha,alpha'-1,3-xylylene, or alpha,alpha'-2,6-lutidylene groups. The compounds cyclo-(1,3-trimethylene-1',2'-closo-1',2'-C(2)B(10)H(10))(4) (6a), cyclo-(1,3-trimethylene-1',2'-closo-9',12'-dimethyl-1',2'-C(2)B(10)H(8))(4) (6b), cyclo-(1,3-trimethylene-1',2'-closo-1',2'-C(2)B(10)H(10))(3) (9), cyclo-(alpha,alpha'-1,3-xylylene-1',2'-closo-1',2'-C(2)B(10)H(10))(2) (11a), cyclo-(alpha,alpha'-1,3-xylylene-1',7'-closo-1',7'-C(2)B(10)H(10))(2) (11b), cyclo-(alpha,alpha'-1,3-xylylene-1',7'-closo-9',10'-dimethyl-1,7-C(2)B(10)H(8))(2) (11c), cyclo-(alpha,alpha'-1,3-xylylene-1',2'-closo-1',2'-C(2)B(10)H(10))(4) (12), cyclo-(alpha,alpha'-1,3-xylylene-1',7'-closo-1',7'-C(2)B(10)H(10))(3) (13), cyclo-(alpha,alpha'-2,6-lutidylene-1',7'-closo-1',7'-C(2)B(10)H(10))(2) (19), and cyclo-(alpha,alpha'-2,6-lutidylene N-oxide-1',7'-closo-1',7'-C(2)B(10)H(10))(2) (20) have been synthesized. The structures of 6a, 6b, 9, 11a, 11b, 11c, 12, and 19 have been determined by X-ray crystallography. Crystal data: for 6a, triclinic, space group P&onemacr;, a = 11.131(2) Å, b = 12.642(2) Å, c = 12.996(2) Å, alpha = 84.383(6) degrees, beta = 65.884(6) degrees, gamma = 97.292(5) degrees, Z = 1, R = 0.079; for 6b, monoclinic, space group P2(1)/a, a = 13.500(2) Å, b = 31.141(3) Å, c = 13.831(2) Å, beta = 99.90(1) degrees, Z = 2, R = 0.097; for 11a, monoclinic, space group C2/c, a = 14.5682(8) Å, b = 14.5046(8) Å, c = 16.1998(8) Å, beta = 95.631(2) degrees, Z = 4, R = 0.081; for 11b, monoclinic, space group P2(1)/n, a = 11.650(2) Å, b = 10.606(2) Å, c = 11.730(2) Å, beta = 104.951(6) degrees, Z = 2, R = 0.069; for 11c, orthorhombic, space group Pbca, a = 12.532(2) Å, b = 14.271(2) Å, c = 18.143(3) Å, Z = 4, R = 0.076; for 19, orthorhombic, space group Pcab (No. 61, standard setting Pbca), a = 11.0428(6) Å, b = 11.3785(6) Å, c = 22.533(1) Å, Z = 4, R = 0.074.
Journal Article↗
Palladium-Catalyzed Coupling of Ethynylated p-Carborane Derivatives: Synthesis and Structural Characterization of Modular Ethynylated p-Carborane Molecules.
Methodology leading to a new class of rodlike p-carborane derivatives is described, involving the palladium-catalyzed coupling of B-iodinated p-carboranes with terminal alkynes. The products of these reactions contain an alkyne substituent at a boron vertex of the p-carborane cage. Reaction of closo-2-I-1,12-C(2)B(10)H(11) (1) with closo-2-(C&tbd1;CH)-1,12-C(2)B(10)H(11) (3) in the presence of pyrrolidine and catalytic quantities of bis(triphenylphosphine)palladium dichloride and cupric iodide yields 1,2-(closo-1',12'-C(2)B(10)H(11)-2'-yl)(2) acetylene (4). Oxidative coupling of 3 in the presence of cupric chloride in piperidine affords 1,4-(closo-1',12'-C(2)B(10)H(11)-2'-yl)(2)-1,3-butadiyne (5). Reaction of 2 molar equiv. of closo-2,9-I(2)-1,12-C(2)B(10)H(10) (6) withcloso-2,9-(C&tbd1;CH)(2)-1,12-C(2)B(10)H(10) (7) in the presence of pyrrolidine and catalytic quantities of bis(triphenylphosphine)palladium dichloride and cupric iodide yields closo-2,9-(closo-2'-I-9'-C&tbd1;C-1',12'-C(2)B(10)H(10))(2)-1,12-C(2)B(10)H(10) (8), a rigid, iodine-terminated carborod trimer in which the p-carborane cages are linked at the 2 and 9 B-vertices by alkyne (C&tbd1;C) bridges. The molecular structures of 5 and the previously described closo-2,9-(C&tbd1;CSiMe(3))(2)-1,12-C(2)B(10)H(10) (9) have been determined by X-ray crystallography. Crystallographic data are as follows: for 5, monoclinic, space group P2/a, a = 12.352(6) Å, b = 14.169 (6) Å, c = 12.384(5) Å, beta = 109.69(2) degrees, V = 2041 Å(3), Z = 4, R = 0.098, R(w)( )()= 0.135; for 9, monoclinic, space group C2/m, a = 22.111(4) Å, b = 7.565(2) Å, c = 6.943(2) Å, beta = 107.871(8) degrees, V = 1105 Å(3), Z = 2, R = 0.059, R(w)( )()= 0.090.
Journal Article↗
Computational design and experimental performance testing of an axial-flow pediatric ventricular assist device.
The Virginia Artificial Heart Institute continues to design and develop an axial-flow pediatric ventricular assist device (PVAD) for infants and children in the United States. Our research team has created a database to track potential PVAD candidates at the University of Virginia Children's Hospital. The findings of this database aided with need assessment and design optimization of the PVAD. A numerical analysis of the optimized PVAD1 design (PVAD2 model) was also completed using computational fluid dynamics (CFD) to predict pressure-flow performance, fluid force estimations, and blood damage levels in the flow domain. Based on the PVAD2 model and after alterations to accommodate manufacturing, a plastic prototype for experimental flow testing was constructed via rapid prototyping techniques or stereolithography. CFD predictions demonstrated a pressure rise range of 36-118 mm Hg and axial fluid forces of 0.8-1.7 N for flows of 0.5-3 l/min over 7000-9000 rpm. Blood damage indices per CFD ranged from 0.24% to 0.35% for 200 massless and inert particles analyzed. Approximately 187 (93.5%) of the particles took less than 0.14 seconds to travel completely through the PVAD. The mean residence time was 0.105 seconds with a maximum time of 0.224 seconds. Additionally, in a water/glycerin blood analog solution, the plastic prototype produced pressure rises of 20-160 mm Hg for rotational speeds of 5960 +/- 18 rpm to 9975 +/- 31 rpm over flows from 0.5 to 4.5 l/min. The numerical results for the PVAD2 and the prototype hydraulic testing indicate an acceptable design for the pump, represent a significant step in the development phase of this device, and encourage manufacturing of a magnetically levitated prototype for animal experiments.
Adolescent↗
Thalidomide down-regulates the expression of VEGF and bFGF in cisplatin-resistant human lung carcinoma cells.
Anti-angiogenic therapy represents one of the most promising treatment modalities for human cancer. Thalidomide (alpha-N-phthalimidoglutarimide) is a potent inhibitor of angiogenesis, and it is reported to overcome classical drug resistance in human multiple myeloma cells. However, the effect of this agent on the expression of angiogenic growth factors in cisplatin-resistant tumors is largely unknown. In the current study, we showed that thalidomide suppressed the expression of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) in cisplatin-resistant human A549DDP lung carcinoma cells. The mRNA levels of VEGF and bFGF were markedly decreased in the A549DDP cells treated with the therapeutic concentrations of thalidomide (0.6-6 micrograms/ml), as determined by RT-PCR analysis. Consistent with these results, thalidomide also significantly reduced the protein levels of VEGF and bFGF in these cells in a dose- and time-dependent manner. This study provided evidence to support the potential therapeutic applications of thalidomide in cisplatin-resistant human lung cancer and other tumors.
Adenocarcinoma↗