Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0085437 (bacterial meningitis)
 4,038 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The value of phosphohexose isomerase (EC 5.3.1.9) determination in the CSF in the diagnosis of meningitis was tested under routine conditions. In 48 patients with untreated bacterial meningitis, enzyme activity concentrations between 40 and 2335 U/l were measured, whereas the highest phosphohexose isomerase activity concentration in 92 patients with viral meningitis was 34 U/l. Lysis of the CSF leukocytes with Triton X-100 resulted in a substantial increase of phosphohexose isomerase activity. In bacterial meningitis these values increased to 200 to 7000 U/l, but remained under 150 U/l in viral meningitis. The raised enzyme activities are derived from the leukocytes and appear to reflect their functional and metabolic state. The information provided by the leukocyte morphology can thus be appreciably extended by phosphohexose isomerase determination.
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PMID:Clinical significance and source of raised catalytic activities of phosphohexose isomerase in the CSF in meningitis. 355 79

An inhibition enzyme-linked immunosorbent assay (ELISA) for the detection of herpes simplex virus antigens in cerebrospinal fluid (CSF) has been developed. A Triton X-100 extract of herpes simplex virus type 1 (HSV-1) infected HEp-2 cells was used to coat wells of polyvinyl chloride plates. Rabbit anti-HSV-1 globulin served as the reference antibody and the CSF specimens were tested at a final dilution of 1:4. Positive results were obtained in CSF specimens from 11/18 (61%) neonates with HSV infection, 15/23 (65%) older individuals with HSV culture positive brain biopsies, and in 4/29 (14%) patients with culture negative brain biopsies. The assay was negative with CSF from 14 infants without HSV infections, from 30 patients with bacterial meningitis and 10 with cryptococcal meningitis. The test was positive in 10/21 patients within 10 days of onset, 11/14 within 11-20 days, and in 5/6 more than 20 days after onset of the herpetic infection. The overall sensitivity of the assay was 63% and the specificity was 95%.
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PMID:ELISA for the detection of herpes simplex virus antigens in the cerebrospinal fluid of patients with encephalitis. 631 49

Apart from antibiotic treatment in bacterial meningitis supportive therapy including dexamethasone is widely used. In investigations on the pathogenesis of bacterial meningitis we previously demonstrated that Streptococcus suis (S. suis), a relevant cause of bacterial meningitis in pigs and humans, affects porcine choroid plexus epithelial cell (PCPEC) barrier function. The choroid plexus epithelium constitutes the structural basis of the blood-CSF barrier. Now, we investigated the role of tight junction proteins and the actin cytoskeleton of PCPEC in correlation to barrier function after S. suis infection and analyzed the influence of dexamethasone. S. suis caused massive rearrangement of the tight junction proteins ZO-1, occludin and claudin-1, caused loss of actin at the apical cell pole and induced basolateral stress fiber formation. Moreover, tight junctions were shifted from the Triton X insoluble to the Triton X soluble fraction, and additionally occludin was dephosphorylated and degraded. Infection with S. suis leads to an inflammatory response exemplified by the induction of tumor necrosis factor (TNF) alpha and matrix metalloproteinase (MMP)-3 gene activation, which correlated with phosphorylation of extracellular signal regulated kinases (ERKs). Importantly, dexamethasone significantly prevented S.suis-induced protein and morphological tight junction alterations and attenuated ERK activation and MMP-3 expression. It especially improved the barrier function by preventing tight junction protein reorganization and degradation. In the pathogenesis of bacterial meningitis protection of blood-CSF barrier by dexamethasone may prevent the penetration of bacteria and leukocytes into the CSF.
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PMID:Dexamethasone prevents alteration of tight junction-associated proteins and barrier function in porcine choroid plexus epithelial cells after infection with Streptococcus suis in vitro. 1864 52