Cerebrospinal Fluid Proteins: Concentration by Membrane Ultrafiltration and Fractionation by Electrophoresis on Cellulose Acetate

1970 ◽  
Vol 16 (5) ◽  
pp. 416-419 ◽  
Author(s):  
Rita M Windisch ◽  
Mark M Bracken
Keyword(s):  
Cerebrospinal Fluid ◽  
Cellulose Acetate ◽  
Total Protein ◽  
Protein Fractions ◽  
Cellulose Acetate Electrophoresis ◽  
Mean Values ◽  
Cerebrospinal Fluid Proteins ◽  
Ultra Filtration

Abstract A membrane ultrafiltration system is described and evaluated for rapidly concentrating cerebrospinal fluid before cellulose acetate electrophoresis. Results with this system were compared with those obtained by use of vacuum ultrafiltration through a collodion sac. Mean values for the various protein fractions were determined for normal cerebrospinal fluid. The results, in percentage of total protein, after membrane and vacuum ultra-filtration concentration were, respectively: 3.8 and 5.2% prealbumin, 65.5 and 63.9% albumin, 3.6 and 3.6% ∝1-globulin, 6.8 and 6.1% arglobulin, 12.4 and 12.9% a-globulin, and 7.6 and 8.2% γ-globulin.

Concentration of Cerebrospinal Fluid Proteins and Their Fractionation by Cellulose Acetate Electrophoresis

1966 ◽  
Vol 12 (10) ◽  
pp. 717-727 ◽  
Author(s):  
Alex Kaplan ◽  
Murray Johnstone
Keyword(s):  
Cerebrospinal Fluid ◽  
Cellulose Acetate ◽  
Convenient Method ◽  
Protein Fractions ◽  
Electrophoretic Separation ◽  
Cellulose Acetate Electrophoresis ◽  
Mean Values ◽  
Cerebrospinal Fluid Proteins ◽  
The Mean

Abstract Various technics for concentrating cerebrospinal fluid (CSF) prior to electrophoretic separation of the protein fractions were tested. Vacuum ultrafiltration through a collodion sac proved to be the most reliable and convenient method. The proteins in the concentrate were separated by cellulose acetate electrophoresis and quantitated densitometrically. The mean values for the various protein fractions in normal CSF were the following: 4.9% pre-albumin, 61.5% albumin, 4.5% α1 globulin, 6.7% α2 globulin, 13.7% β globulin, and 8.8% γ globulin.

Haemolymph Proteins and Yolk Formation in Rhodnius Prolixus Stål

1965 ◽  
Vol 43 (3) ◽  
pp. 425-431
Author(s):  
G. C. COLES
Keyword(s):  
Cellulose Acetate ◽  
Total Protein ◽  
Egg Production ◽  
Fat Body ◽  
Rhodnius Prolixus ◽  
Hormonal Control ◽  
Protein Fractions ◽  
Yolk Formation ◽  
Specific Proteins

1. There are two adult-specific proteins in the haemolymph of Rhodnius. They appear to be formed in the fat body. 2. The two proteins are absorbed by the oocytes and form the bulk of the soluble egg proteins. 3. The changes in the concentration of total protein in the haemolymph and of four protein fractions, as separated on cellulose acetate, do not reflect egg production. This may be a consequence of the hormonal control of reproduction.

Cellulose Acetate Electrophoresis of Proteins of Serum, Cerebrospinal Fluid, and Urine

1970 ◽  
pp. 13-30 ◽  
Author(s):  
ALEX KAPLAN ◽  
JOHN SAVORY ◽  
WILLARD R. FAULKNER ◽  
GUILFORD G. RUDOLPH ◽  
WENDELL J. FORD ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Cellulose Acetate ◽  
Cellulose Acetate Electrophoresis ◽  
Electrophoresis Of Proteins

Imprecision of quantification of serum protein fractions by electrophoresis on cellulose acetate.

1986 ◽  
Vol 32 (2) ◽  
pp. 356-357 ◽  
Author(s):  
S N Kahn ◽  
L P Strony
Keyword(s):  
High Resolution ◽  
Serum Albumin ◽  
Cellulose Acetate ◽  
Serum Protein ◽  
Protein Fractions ◽  
Visual Interpretation ◽  
Cellulose Acetate Electrophoresis ◽  
Trained Observer ◽  
Electrophoretic Patterns

Abstract We studied the precision of densitometric quantification of the protein zones resolved by cellulose acetate electrophoresis. Replicate analyses of patients' samples by a single technologist showed mean CVs ranging from 2.9% for serum albumin to 9.5% for alpha 1-globulin. There were marked differences in measurements obtained by replicate analysis of the same samples by two experienced technologists. We calculated what changes in fractional concentrations would be analytically significant and concluded that densitometry of cellulose acetate electrophoretograms can only be semi-quantitative. We suggest that visual interpretation of high-resolution electrophoretic patterns by a trained observer can replace densitometry in most cases.

scholarly journals sICAM-1 in meningoencephalitis due to Angiostrongylus cantonensis

2006 ◽  
Vol 64 (3a) ◽  
pp. 589-591 ◽  
Author(s):  
Alberto Juan Dorta-Contreras ◽  
Piotr Lewczuc ◽  
Elena Noris-García ◽  
María Teresa Interián-Morales ◽  
María Esther Magraner Tarrau ◽  
...  
Keyword(s):  
Immune Response ◽  
Cerebrospinal Fluid ◽  
Total Protein ◽  
Serum Analysis ◽  
Angiostrongylus Cantonensis ◽  
Brain Response ◽  
Serum Samples ◽  
Mean Values ◽  
Diagnostic Puncture ◽  
Eosinophilic Meningoencephalitis

INTRODUCTION: Angiostrongylus cantonensis meningoencephalitis is an emergent disease in the Americas. METHOD: Twelve children suffering from eosinophilic meningoencephalitis due to this parasite aged between 6-10 years were studied. Cerebrospinal fluid (CSF) and serum samples were taken simultaneously in the first diagnostic puncture at admission. RESULTS: All cases showed typical findings on the routine CSF and serum analysis: increased CSF total protein, increased Q (CSF/serum) albumin accompanied by eosinophilia in CSF. No intrathecal synthesis of immunoglobulins was found. Mean serum and CSF sICAM-1 values were 337.4 and 3.97 ng/mL. Qalbumin and QsICAM-1 mean values were 4.1 and 6.2 respectively. In 50% of the patients an increased brain-derived fraction of sICAM-1 was found. CONCLUSION: It may be suggested that a dynamic of the sICAM-1 brain derived fraction is perhaps associated to the immune response in the evolution of the disease.sICAM-1 may be an agent in negative feedback for eosinophils passage through the blood-CSF barrier into the inflammatory brain response.

Electrophoretic analysis of cerebrospinal fluid proteins in patients with central nervous system mass lesions

1972 ◽  
Vol 36 (6) ◽  
pp. 679-686 ◽  
Author(s):  
Emil Lee Weber
Keyword(s):  
Central Nervous System ◽  
Cerebrospinal Fluid ◽  
Nervous System ◽  
Total Protein ◽  
Gamma Globulin ◽  
Protein Fractions ◽  
Common Finding ◽  
Benign Tumors ◽  
Glial Tumors ◽  
Mass Lesions

✓ The protein constituents of the cerebrospinal fluid (CSF) from 234 patients with central nervous system mass lesions and nine patients with pseudotumor syndrome were analyzed by cellulose acetate electrophoresis. The alpha 2 and gamma globulin fractions were most frequently elevated, and more so with metastatic and malignant glial tumors than with benign tumors. Elevation of either fraction frequently occurred independent of the total protein content of the CSF and appears to indicate a primary parenchymal involvement of the brain. Gamma globulin elevations in patients with benign glial tumors were often associated with intracerebral cyst formation. Pituitary adenomas were not associated with elevation of the gamma globulin fraction whereas this was a common finding with other parasellar lesions. All CSF specimens associated with masses of infectious origin had markedly elevated gamma globulin levels irrespective of normal total protein levels. Two metastatic tumors from the gastrointestinal tract, a solitary plasmacytoma, and a case of increased intracranial pressure secondary to nalidixic acid therapy showed dramatic and specific increases in certain CSF protein fractions. The origin of the various protein fractions is discussed as well as the overall clinical applicability of CSF protein electrophoresis in patients with intracranial mass lesions.

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