[Polymorphism of length of tetranucleotide repeat from the 5'-side from the myelin basic protein gene in multiple sclerosis in Russians]. 2003

T V Andreevskiĭ, and F R Guérini, and M A Sudomoina, and A N Boĭko, and A D Alekseenkov, and O G Kulakova, and K Kitsuake, and O Ferrabte, and E I Gusev, and O O Favorova
Russian State Medical University, Cardiology Research Center, Ministry of Public Health, Russian Federation, Moscow, Russia.

The myelin basic protein gene (MBP) can confer the susceptibility to multiple sclerosis, because its protein product is the main protein component of myelin of the central nervous system and a potential autoimmune antigen in the disease. A possible association of multiple sclerosis with alleles and genotypes of a microsatellite repeat (TGGA)n, located to the 5' side from the first exon of MBP in ethnic Russians (126 patients with reliable multiple sclerosis and 142 healthy controls from Central Russia) was analyzed using the case-control method. Upon separation of the tetranucleotide repeat site amplification products in 1.5% agarose gel, one can see two distinct bands that can be analyzed as two allele groups (A and B). The distribution of allele A and B group frequencies as well as frequency of allele group B and genotype A/A reliably differs in multiple sclerosis patients and healthy controls. Alleles A and the A/A genotype are associated with the development of multiple sclerosis. We also analyzed the association of multiple sclerosis with combined bearing of alleles and genotypes A and B of MBP and groups of alleles of the DRB1 gene of the major histocompatibility complex that correspond to serospecificities DR1-DR18. The comparison of subgroups of multiple sclerosis patients and healthy individuals, formed on the basis of the DRB1 phenotype, has shown a reliable increase in the frequency of allele B in healthy individuals and the genotype A/A frequency in patients, only among DR4- and DR5-positive individuals. No reliable difference was found in the MBP allele and genotype distribution between multiple sclerosis patients and healthy individuals in combined groups of (DR4,DR5)-negative individuals, i.e., no carriers of any phenotype except DR4 and DR5 were revealed. Thus, MBP or some other nearby gene is involved in the multiple sclerosis development in Russians, predominantly (or exclusively) among DR4 and DR5 carriers. In this case, without stratification of analyzed individuals by the MBP alleles, multiple sclerosis is reliably associated only with DR2(15), but not of DR4 and DR5 alleles of DRB1. The results obtained are in favor of the genetic heterogeneity of multiple sclerosis, and suggest the possibility of epistatic interactions between the MBP and DRB1 genes.

UI MeSH Term Description Entries
D009103 Multiple Sclerosis An autoimmune disorder mainly affecting young adults and characterized by destruction of myelin in the central nervous system. Pathologic findings include multiple sharply demarcated areas of demyelination throughout the white matter of the central nervous system. Clinical manifestations include visual loss, extra-ocular movement disorders, paresthesias, loss of sensation, weakness, dysarthria, spasticity, ataxia, and bladder dysfunction. The usual pattern is one of recurrent attacks followed by partial recovery (see MULTIPLE SCLEROSIS, RELAPSING-REMITTING), but acute fulminating and chronic progressive forms (see MULTIPLE SCLEROSIS, CHRONIC PROGRESSIVE) also occur. (Adams et al., Principles of Neurology, 6th ed, p903) MS (Multiple Sclerosis),Multiple Sclerosis, Acute Fulminating,Sclerosis, Disseminated,Disseminated Sclerosis,Sclerosis, Multiple
D011110 Polymorphism, Genetic The regular and simultaneous occurrence in a single interbreeding population of two or more discontinuous genotypes. The concept includes differences in genotypes ranging in size from a single nucleotide site (POLYMORPHISM, SINGLE NUCLEOTIDE) to large nucleotide sequences visible at a chromosomal level. Gene Polymorphism,Genetic Polymorphism,Polymorphism (Genetics),Genetic Polymorphisms,Gene Polymorphisms,Polymorphism, Gene,Polymorphisms (Genetics),Polymorphisms, Gene,Polymorphisms, Genetic
D004676 Myelin Basic Protein An abundant cytosolic protein that plays a critical role in the structure of multilamellar myelin. Myelin basic protein binds to the cytosolic sides of myelin cell membranes and causes a tight adhesion between opposing cell membranes. Golli-MBP1 Protein,Golli-MBP2 Protein,HOG5 Protein,HOG7 Protein,MBP1 Protein,MBP2 Protein,MBP3 Protein,MBP4 Protein,Myelin Basic Protein, 17.2 kDa Isoform,Myelin Basic Protein, 18.5 kDa Isoform,Myelin Basic Protein, 20.2 kDa Isoform,Myelin Basic Protein, 21.5 kDa Isoform,Myelin Basic Protein, Isoform 1,Myelin Basic Protein, Isoform 2,Myelin Basic Protein, Isoform 3,Myelin Basic Protein, Isoform 4,Myelin Basic Protein, Isoform 5,Myelin Basic Protein, Isoform 6,Myelin Basic Protein, Isoform 7,Golli MBP1 Protein,Golli MBP2 Protein
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D012426 Russia A country located in north Asia bordering the Arctic Ocean, extending from Europe (the portion west of the Urals) to the North Pacific Ocean. The capital is Moscow. Russian S.F.S.R.,Russian Federation (Europe),Russian SFSR
D016133 Polymerase Chain Reaction In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships. Anchored PCR,Inverse PCR,Nested PCR,PCR,Anchored Polymerase Chain Reaction,Inverse Polymerase Chain Reaction,Nested Polymerase Chain Reaction,PCR, Anchored,PCR, Inverse,PCR, Nested,Polymerase Chain Reactions,Reaction, Polymerase Chain,Reactions, Polymerase Chain
D017931 DNA Primers Short sequences (generally about 10 base pairs) of DNA that are complementary to sequences of messenger RNA and allow reverse transcriptases to start copying the adjacent sequences of mRNA. Primers are used extensively in genetic and molecular biology techniques. DNA Primer,Oligodeoxyribonucleotide Primer,Oligodeoxyribonucleotide Primers,Oligonucleotide Primer,Oligonucleotide Primers,Primer, DNA,Primer, Oligodeoxyribonucleotide,Primer, Oligonucleotide,Primers, DNA,Primers, Oligodeoxyribonucleotide,Primers, Oligonucleotide
D018895 Microsatellite Repeats A variety of simple repeat sequences that are distributed throughout the GENOME. They are characterized by a short repeat unit of 2-8 basepairs that is repeated up to 100 times. They are also known as short tandem repeats (STRs). Microsatellite Markers,Pentanucleotide Repeats,Simple Repetitive Sequence,Tetranucleotide Repeats,Microsatellites,Short Tandem Repeats,Simple Sequence Repeats,Marker, Microsatellite,Markers, Microsatellite,Microsatellite,Microsatellite Marker,Microsatellite Repeat,Pentanucleotide Repeat,Repeat, Microsatellite,Repeat, Pentanucleotide,Repeat, Short Tandem,Repeat, Simple Sequence,Repeat, Tetranucleotide,Repeats, Microsatellite,Repeats, Pentanucleotide,Repeats, Short Tandem,Repeats, Simple Sequence,Repeats, Tetranucleotide,Repetitive Sequence, Simple,Repetitive Sequences, Simple,Sequence Repeat, Simple,Sequence Repeats, Simple,Sequence, Simple Repetitive,Sequences, Simple Repetitive,Short Tandem Repeat,Simple Repetitive Sequences,Simple Sequence Repeat,Tandem Repeat, Short,Tandem Repeats, Short,Tetranucleotide Repeat

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