scholarly journals Sex-Related Differences in Cerebrospinal Fluid Plasma-Derived Proteins of Neurological Patients

Diagnostics ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 884
Author(s):  
Massimiliano Castellazzi ◽  
Caterina Ferri ◽  
Sarah Alfiero ◽  
Ilenia Lombardo ◽  
Michele Laudisi ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Serum Albumin ◽  
Protein Content ◽  
Total Protein Content ◽  
Igg Synthesis ◽  
Neurological Patients ◽  
Intrathecal Igg Synthesis ◽  
Males And Females ◽  
Oligoclonal Igg ◽  
Oligoclonal Igg Bands

Background and aims: Cerebrospinal fluid (CSF) protein content presents a sexual dimorphism in humans. We investigated sex-related differences in CSF IgG levels and in the quantification of intrathecal IgG synthesis (IIS). Methods: CSF, serum albumin and IgG were measured in 1519 neurological patients and both linear and hyperbolic formulas were used for the quantification of IIS. CSF-restricted oligoclonal IgG bands (OCBs) were used as “gold standard”. Results: The linear IgG Index showed a weak agreement with OCBs in males and females (k = 0.559, k = 0.587, respectively), while the hyperbolic Reiber’s formulas had a moderate agreement with OCBs in females (k = 0.635) and a weak agreement in males (k = 0.565). Higher CSF albumin and IgG levels were found in men than in women in the whole population and in subjects without IIS after adjusting for age and for serum concentrations of albumin and IgG, respectively (Quade statistics, p < 0.000001). CSF and serum albumin and IgG levels positively correlated to age in both sexes. CSF total protein content did not correlate with CSF leukocyte numbers but was higher in patients with marked pleocytosis. Conclusions: In neurological patients, men have higher levels of CSF serum-derived proteins, such as albumin and IgG.

scholarly journals Multiple sclerosis in Brazil: analysis of cerebrospinal fluid by standard methods

1999 ◽  
Vol 57 (4) ◽  
pp. 927-931 ◽  
Author(s):  
MARZIA PUCCIONI-SOHLER ◽  
FABIOLA PASSER ◽  
CRISTIANE OLIVEIRA ◽  
CARLOS OTÁVIO BRANDÃO ◽  
REGINA PAPAIZ-ALVARENGA
Keyword(s):  
Multiple Sclerosis ◽  
Laboratory Parameter ◽  
Oligoclonal Bands ◽  
Local Production ◽  
Concerted Action ◽  
Standard Methods ◽  
Igg Synthesis ◽  
Intrathecal Igg Synthesis ◽  
Oligoclonal Igg ◽  
Oligoclonal Igg Bands

The demonstration of intrathecal IgG synthesis has been used as an important laboratory parameter to support the diagnosis of multiple sclerosis(MS). The Committee for European Concerted Action for Multiple Sclerosis has recommended a protocol for the assessment of intrathecal IgG synthesis. We applied this methodology to determine the cerebrospinal (CSF) profile of 128 Brazilian patients with MS. We detected hypercytosis lower than 35 cells/mm3 in 97%, protein lower than 80mg/dl in 99%, normal blood-CSF barrier function in 76%, increased IgG local production around 53% and oligoclonal IgG bands by isoelectric focusing in 85% of the definite MS patients. The diagnostic accuracy of the quantitative analysis was lower than the qualitative. The detection of oligoclonal bands was especially important in the cases of normal quantitative assays of IgG. In addition, we found a lower frequency of inflammatory reaction in CSF in our MS cases, in comparison to some European studies.

Oligoclonal IgG bands in cerebrospinal fluid in various neurological diseases

1983 ◽  
Vol 13 (4) ◽  
pp. 434-439 ◽  
Author(s):  
Anita B. Chu ◽  
John L. Sever ◽  
David L. Madden ◽  
Marti Iivanainen ◽  
Marta Leon ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Neurological Diseases ◽  
Oligoclonal Igg ◽  
Oligoclonal Igg Bands

scholarly journals Oligoclonal IgG bands in the cerebrospinal fluid of portuguese patients with multiple sclerosis: negative results indicate benign disease

2005 ◽  
Vol 63 (2b) ◽  
pp. 375-379 ◽  
Author(s):  
Maria José Sá ◽  
Lucinda Sequeira ◽  
Maria Edite Rio ◽  
Edward J. Thompson
Keyword(s):  
Multiple Sclerosis ◽  
Cerebrospinal Fluid ◽  
Benign Disease ◽  
Serum Samples ◽  
Negative Results ◽  
Significant Difference ◽  
Relapsing Remitting ◽  
The Mean ◽  
Oligoclonal Igg ◽  
Oligoclonal Igg Bands

We assessed the frequency of cerebrospinal fluid (CSF) restricted oligoclonal IgG bands (IgG-OCB) in Portuguese multiple sclerosis (MS) patients and its relationship with outcome. Paired CSF/serum samples of 406 patients with neurological disorders were submitted to isoelectric focusing with immunodetection of IgG. Ninety-two patients had definite MS; non-MS cases were assembled in groups inflammatory/infectious diseases (ID, n=141) and other/controls (OD, n=173). We found in the MS group: mean duration, 38.9 months; clinically isolated syndromes, 24%; relapsing/remitting course (RR), 65%; in RR patients the mean EDSS was 2.1 and the mean index of progression was 0.31. Positive patterns significantly predominated in MS (82.6%; ID, 40.4%; OD, 3.5%). The sensitivity and the specificity of positive IgG-OCB for MS diagnosis was 82.6% and 79.9%, respectively. The sole statistically significant difference in the MS group was the lower progression index observed in negative cases. We conclude that the frequency of positive IgG-OCB patterns in our MS patients fits most values reported in the literature, and that negative results indicate benign disease.

Multiple sclerosis immunopathic trait and HLA-DR(2)15 as independent risk factors in multiple sclerosis

2007 ◽  
Vol 13 (4) ◽  
pp. 441-445 ◽  
Author(s):  
M. Callander ◽  
S. Haghighi ◽  
A.-M. Landtblom ◽  
C.E. Ahlgren ◽  
S.I. Nilsson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Multiple Sclerosis ◽  
Cerebrospinal Fluid ◽  
Susceptibility Gene ◽  
Hla Dr ◽  
Healthy Siblings ◽  
Independent Risk Factors ◽  
Oligoclonal Igg ◽  
Hla Haplotypes ◽  
Oligoclonal Igg Bands

We analysed HLA haplotypes in pairs of 78 sporadic multiple sclerosis (MS) patients and 78 healthy siblings. The presence of 2 oligoclonal IgG bands, detected by immunoblotting of the cerebrospinal fluid in healthy siblings, has previously been defined as MS immunopathic trait (MSIT), based on a cut-off derived from healthy unrelated volunteers. The frequency of MSIT was 17.9% (n=14/78 siblings). The HLA-DR(15)2 allelle was present in 21.4% (n=3/14) of the siblings with MSIT, in 40.6% (n =26/64) of the siblings without MSIT, and in 59% (n =46/78) of the patients with clinically-definite (CD) MS. The distribution of zero, one or two HLA-DR(2)15 alleles was significantly skewed towards a lower allelle count in the siblings with MSIT compared with the group of unrelated siblings with MS (P=0.002), and also lower than their related siblings with MS (P=0.1). These results suggest that the MS susceptibility gene, HLA-DR(2)15 type, does not induce MSIT, and conceivably these are two separate risk factors in the development of MS. The effect of HLA-DR(2)15 and MSIT in sporadic MS appears to be synergistic. Multiple Sclerosis 2007; 13: 441-445. http://msj.sagepub.com

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