Abstract:
:The protein kinase-C (PKC) second messenger system contributes to regulation of cell growth and differentiation. This study was undertaken to examine the effects of modulators of the PKC enzyme system on the state of differentiation and proliferation rates of human gliomas in vitro. The administration of the PKC-activating phorbol esters 4-beta-phorbol-12,13-dibutyrate (PDB) and phorbol-12-myristate-13-acetate (PMA) resulted in a dose-related inhibition of growth of human glioma cell lines in vitro as measured by 3H-thymidine uptake. The synthetic nonphorbol PKC activator (SC-9) produced an even more pronounced decrease of 3H-thymidine uptake. Diacylglycerol, an endogenous activator of the system, applied externally, transiently decreased the proliferation, in concordance with its short-lived existence in vivo. Conversely, the administration of 4-alpha-phorbol-12,13-didecanoate (alpha-PDD), a phorbol ester that binds but does not activate the enzyme, had no effect on the proliferation rate. At the dosages that maximally decreased proliferation, there was no evidence of direct glioma cell lysis induced by these agents as measured by a chromium-release assay. Immunocytochemical analysis and cytofluorometric measurement of glial fibrillary acidic protein (GFAP) staining in the treated cultures revealed an increase in GFAP staining over control cultures. In contrast to the response of glioma cells, nonmalignant human adult astrocytes treated with the PKC activators responded by increasing their proliferation rate. The authors postulate that the diametrically opposed effects of PKC activators on nonmalignant astrocytes versus glioma growth may be due to a high intrinsic PKC activity in glioma cells, with resultant down-regulation of enzyme activity following the administration of the pharmacological activators.
journal_name
J Neurosurgjournal_title
Journal of neurosurgeryauthors
Couldwell WT,Antel JP,Apuzzo ML,Yong VWdoi
10.3171/jns.1990.73.4.0594subject
Has Abstractpub_date
1990-10-01 00:00:00pages
594-600issue
4eissn
0022-3085issn
1933-0693journal_volume
73pub_type
杂志文章abstract::This series of 228 patients with infantile non-neoplastic hydrocephalus who received either a ventriculoatrial (VA) or a ventriculoperitoneal (VP) shunt before 2 years of age was followed for an average of 7 years, and the results with the two types of shunt were compared. Mortality and infection rates were similar fo...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1979.50.2.0179
更新日期:1979-02-01 00:00:00
abstract:OBJECT:The authors retrospectively analyzed a consecutive series of patients with cranial vault primary extradural meningioma (PEM), with particular regard to the tumor's dural involvement. The pertinent literature was reviewed. METHODS:Clinical data were retrospectively obtained in a consecutive series of 16 patients...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2006.105.1.51
更新日期:2006-07-01 00:00:00
abstract::The authors describe a case of intracranial heterotopic brain located on the medial one-third of the left sphenoid ridge, and enveloped in a huge cystic cavity. The heterotopic brain was resected successfully with satisfactory clinical results. The resected brain was 8 X 4 X 3 cm in diameter, of 7 or 8 months gestatio...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1978.48.3.0470
更新日期:1978-03-01 00:00:00
abstract::Thalamic, pallidal, and hypothalamic targets were determined in 16 patients by a stereotactic computerized tomography (CT) study using a noninvasive technique with Laitinen's Stereoadapter. At surgery, the Stereoadapter was remounted to the head and the stereotactic CT coordinates were transferred to the Stereoguide w...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1990.73.4.0565
更新日期:1990-10-01 00:00:00
abstract:OBJECT:The aim of this study was to acquire intraoperative images during neurosurgical procedures for later reconstruction into a stereoscopic image system (QuickTime Virtual Reality [QTVR]) that would improve visualization of complex neurosurgical procedures. METHODS:A robotic microscope and digital cameras were used...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,评审
doi:10.3171/jns.2004.100.4.0591
更新日期:2004-04-01 00:00:00
abstract::Recombinant gamma-interferon (2 mg/sq m) was administered intravenously twice weekly in 8-week courses to 14 patients with recurrent gliomas. Computerized tomography (CT) evidence of response was seen in only one patient, and stabilization for 12 to 86 weeks was recorded in three. This was a disappointing result, part...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1988.69.6.0826
更新日期:1988-12-01 00:00:00
abstract:OBJECTIVE:Superficial temporal artery-middle cerebral artery (STA-MCA) bypass is a common approach for treating moyamoya disease (MMD); however, the selection of recipient vessels is still controversial, and its relationship with postoperative cerebral hyperperfusion (CHP) has not been revealed. The aim of the study wa...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2019.10.JNS191207
更新日期:2019-12-27 00:00:00
abstract::The roles of hemoglobin (Hb) in the pathogenesis of cerebral vasospasm remain a matter of discussion. Hemoglobin is known to be released from extravasated red blood cells in a variety of pathological conditions, including subarachnoid hemorrhage. These conditions are often accompanied by infiltration of inflammatory c...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1994.81.6.0895
更新日期:1994-12-01 00:00:00
abstract:OBJECT:Using a database that enabled longitudinal follow-up, the authors assessed the long-term outcomes of unruptured cerebral aneurysms repaired by clipping or coiling. METHODS:An observational analysis of the California Office of Statewide Health Planning and Development (OSHPD) database, which follows patients lon...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.3.JNS131159
更新日期:2014-06-01 00:00:00
abstract::OBJECTIVE The Agency of Healthcare Research and Quality (AHRQ) has defined Patient Safety Indicators (PSIs) for assessments in quality of inpatient care. The hypothesis of this study is that, in the treatment of unruptured cerebral aneurysms (UCAs), PSI events are less likely to occur in hospitals meeting the volume t...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.5.JNS162778
更新日期:2018-08-01 00:00:00
abstract::A case of giant aneurysmal bone cyst of the skull is reported. Treatment was by total excision in three-staged surgery. The patient made a good recovery. ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1977.47.4.0633
更新日期:1977-10-01 00:00:00
abstract:OBJECT:To explore factors affecting the survival rate in patients with meningiomas, the authors used the National Cancer Data Base (NCDB), which includes tumors from approximately 1000 hospitals participating in the American College of Surgeons tumor registry program. METHODS:Analysis included over 9000 cases diagnose...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,多中心研究
doi:10.3171/jns.1998.88.5.0831
更新日期:1998-05-01 00:00:00
abstract::The water in normal and edematous brain tissues of rats was studied by the pulse nuclear magnetic resonance (NMR) technique, measuring the longitudinal relaxation time (T1) and the transverse relaxation time (T2). In the normal brain, T1 and T2 were single components, both shorter than in pure water. Prolongation and ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1982.56.6.0747
更新日期:1982-06-01 00:00:00
abstract::A technique is described for removing previously placed aneurysm clips and applying new aneurysm clips for the treatment of regrown or reruptured cerebral aneurysms in patients more than 10 years after the original clipping of the aneurysm neck. The adherent tissue covering previously placed clips is cut just on and a...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/JNS-07/10/0881
更新日期:2007-10-01 00:00:00
abstract:OBJECT:It is assumed that the observed increase in brain tumor incidence may at least partially be explained by increased use of MRI. However, to date no direct estimate of this effect is available. The authors undertook this registry-based study to examine whether regional frequencies of cerebral MRI use correlate to ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2013.12.JNS131312
更新日期:2014-04-01 00:00:00
abstract::A number of operative techniques have been described for the treatment of herniated thoracic discs. The transfacet pedicle-sparing approach allows for complete disc removal with limited spinal column disruption and soft-tissue dissection. Fifteen cadaveric spinal columns were used for evaluation of exposure, developme...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1995.83.6.0971
更新日期:1995-12-01 00:00:00
abstract::Mongrel dogs with experimental spinal cord injury were treated with the carotenoid compound crocetin. It has been shown that crocetin increases the diffusion speed of oxygen through plasma, and should provide a net increase in oxygen at the level of the capillary endothelial cell. The treated animals showed a signific...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1977.46.3.0358
更新日期:1977-03-01 00:00:00
abstract::OBJECTIVE WHO Grade III gliomas are relatively rare and treated with multiple modalities such as surgery, chemotherapy, and radiotherapy. The impact of the extent of resection (EOR) on improving survival in patients with this tumor type is unclear. Moreover, because of the heterogeneous radiological appearance of Grad...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.3.JNS162383
更新日期:2018-07-01 00:00:00
abstract::Protection of the brain and spinal cord against ischemia is a goal of vast clinical importance. One approach to this objective is to reduce the tissue's functional activity in order to preserve energy for the metabolic processes that are essential to viability. Experiments to explore ways of reducing function-related ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1988.69.4.0568
更新日期:1988-10-01 00:00:00
abstract::Parkinsonism caused by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) exposure was first identified in intravenous drug users. This neurotoxicant has since been used extensively in nonhuman primates to induce an experimental model of Parkinson disease (PD). In this study, the authors examined the intraoperative p...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2008.8.JNS08882
更新日期:2009-02-01 00:00:00
abstract:OBJECT:The expression of estrogen receptor-related antigen (ER-D5) has been demonstrated in many tumors, including those of the brain, but the actual role of ER-D5 in cell growth is unknown. The authors evaluated the role of ER-D5 in the growth of gliomas in vitro. METHODS:Human glioblastoma multiforme (GBM) cell line...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2004.100.5.0923
更新日期:2004-05-01 00:00:00
abstract::Local experimental subarachnoid hemorrhage (SAH) was produced over the cerebral cortex in 15 cats. The cellular response was monitored using ion-specific electrodes for extracellular potassium (K+) and calcium (Ca++) activity, DC cortical potential, and electrocorticogram. The response was characterized by a profound ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1982.56.2.0216
更新日期:1982-02-01 00:00:00
abstract:OBJECT:The goal of this study was to establish the therapeutic window during which delayed therapy with MgSO4 improves neurological motor outcome in rats that have suffered severe traumatic axonal brain injury. METHODS:Severe brain injury was induced in male Sprague-Dawley rats by using the impact-acceleration model o...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1999.90.3.0504
更新日期:1999-03-01 00:00:00
abstract:OBJECT:The authors conducted a study to determine age-related changes in expression of transforming growth factor (TGF)-beta1, -beta2, -beta3, and Type I and Type II receptors in various cells in the nucleus pulposus and anulus fibrosus. Immunolocalization of TGFbetas and Type I and II receptors was examined during the...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/spi.2003.98.1.0063
更新日期:2003-01-01 00:00:00
abstract::The translabyrinthine route or an extension of it was used to remove 150 acoustic nerve tumors. The mortality was 2% and the morbidity low. Preservation of the facial nerve was achieved in 100% of the small and 80% of the medium-sized tumors, but in only 20% of the large growths. The complications encountered are disc...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.52.2.0210
更新日期:1980-02-01 00:00:00
abstract:OBJECT:The purpose of this study was to analyze patient outcomes and to define the role of radiosurgery in patients who have undergone prior microsurgical resection of their vestibular schwannoma. METHODS:The authors evaluated the pre- and postoperative clinical and neuroimaging characteristics of 76 consecutive patie...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1998.89.6.0944
更新日期:1998-12-01 00:00:00
abstract::The authors describe a previously unreported malformation involving paired, bilaterally symmetrical dermal sinus tracts in the retro-auricular area, both of which passed through the asterion and posterior fossa dura mater to end intracranially. Cranial dermal sinus tracts are congenital lesions that virtually always o...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2003.99.1.0163
更新日期:2003-07-01 00:00:00
abstract::Nucleolar organizer regions (NOR's) are loops of deoxyribonucleic acid (DNA) which transcribe to ribosomal ribonucleic acid (RNA) by RNA polymerase I. They possess vital significance in the ultimate synthesis of cellular proteins. A silver colloid staining technique for demonstration of NOR-associated proteins (Ag-NOR...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1991.74.6.0979
更新日期:1991-06-01 00:00:00
abstract::Pressure volume index (PVI) and cerebrospinal fluid (CSF) outflow resistance (Ro) were estimated in spontaneously breathing anestheized cats by the bolus injection test under normal conditions and also under abnormal conditions produced by slow infusion of saline into the CSF space. Bolus injections were made separate...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1986.64.2.0298
更新日期:1986-02-01 00:00:00
abstract::Excision is the treatment of choice in cases of sacral chordoma. Local recurrences, however, have often been observed even after total en bloc resection. The authors assessed outcomes in four cases of tumor recurrence in patients who underwent total en bloc S2-3 resection for sacral chordomas that were located below S...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/spi.2002.97.1.0098
更新日期:2002-07-01 00:00:00