Role of CT venography in the diagnosis and treatment of benign thoracic central venous obstruction.

Objective: To evaluate the role of CT venography in the diagnosis and treatment of benign thoracic central venous obstruction.

Materials And Methods: Eighteen patients who had undergone both CT venography and digital subtraction venography were prospectively enrolled in this study. The following features were analyzed by two observers: the cause, degree, and extent of venous obstruction; associated thrombosis; and implications for the planning of treatment.

[The clinical study of 1,267 cases therapeutic keratoplasty using donor corneal grafts in long-time preservation with dehydrated].

Purpose: To evaluate its effects of 1,267 cases therapeutic keratoplasty using donor corneal grafts in long-time preservation with dehydrated.

Methods: The long-time preservated donor corneal grafts came from Xi'an Eye Bank, they accorded with the clinical demands. To select 1,267 cases therapeutic keratoplasty in August 1976 to December 1999, and make an analysis of preoperation and postoperation visual contrast, original focus controlling, donor corneal graft reviviscence.

[Role of neurokinin-1 receptor in lung injury in rats with acute necrotizing pancreatitis].

Objective: To investigate the expression of neurokinin-1 receptor (NK-1R) in the lung tissue, and the relationship between expression of NK-1R and lung injury in rats with acute necrotizing pancreatitis (ANP).

Methods: One hundred and twenty adult Sprague-Dawley rats were randomly divided into ANP and control groups. Animals in group ANP were induced by the retrograde intraductal infusion of 5% sodium taurocholate (0.

Expression of laminin chains by central neurons: analysis with gene and protein trapping techniques.

Laminins exert numerous effects on neurons in vitro, but expression of laminin subunit genes by neurons in vivo remains controversial. To reexamine this issue, we generated mice from ES cells in which the laminin alpha1, alpha5, beta1, and gamma1 genes had been "trapped" by insertion of a histochemically detectable selectable marker, betageo (beta-galactosidase fused to neomycin phosphotransferase). The presence of laminin-betageo fusion proteins was assayed histochemically and immunochemically, revealing expression of laminin beta1 and gamma1 genes, but not alpha chain genes, by defined subsets of neurons in brain and retina.

[Numerical simulation of moisture movement in landfill bioreactors under the condition of leachate recirculation].

Landfill bioreactor is a new international development field in the municipal solid waste management. It can reduce the difficulty of leachate treatment and accelerate the landfill stability process. The general moisture distribution rules in landfills were analyzed in this paper and a three dimensional transient mathematical model was established to simulate the saturated-unsaturated moisture movement under the condition of leachate recirculation to landfills.

Laminets: laminin- and netrin-related genes expressed in distinct neuronal subsets.

Laminins and netrins are families of related secreted proteins known to play critical roles in guiding the growth of peripheral and central axons, respectively. Here we report the identification of two novel cell surface glycoproteins that we name laminets because they resemble both laminins and netrins. Laminet-1 and -2 are selectively expressed in neurons, each in a distinct subset that includes populations in forebrain, midbrain, hindbrain, spinal cord, and spinal ganglia.

Ca(2+)-regulated, neurosecretory granule channel involved in release from neurohypophysial terminals.

Ion channels from bovine neurohypophysial secretory granules (NSG) were incorporated into artificial lipid bilayers. Specific antibodies against identified synaptic vesicle proteins were tested on such incorporated channel activity and on peptide release from rat permeabilized neurohypophysial terminals. Both the NSG cation channel and Ca(2+)-dependent release were inhibited by only SY-38, a monoclonal antibody directed against the C-terminus of synaptophysin.

The brain-derived neurotrophic factor enhances synthesis of Arc in synaptoneurosomes.

Protein synthesis in neurons is essential for the consolidation of memory and for the stabilization of activity-dependent forms of synaptic plasticity such as long-term potentiation (LTP). Activity-dependent translation of dendritically localized mRNAs has been proposed to be a critical source of new proteins necessary for synaptic change. mRNA for the activity-regulated cytoskeletal protein, Arc, is transcribed during LTP and learning, and disruption of its translation gives rise to deficits in both.