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Biomedical subjects

N A Malygina

Publications and source records attributed to N A Malygina.

At least 19 recordsLinked to original sources
PubMed2002

[HindIII DNA-polymorphism of lipoprotein lipase gene in elderly patients with ischemic heart disease].

AIM: To determine incidence of HindIII alleles of lipoprotein lipase (LPL) in Russian elderly patients with stable effort angina (SEA) functional class II-III regarding lipid metabolism. MATERIAL AND METHODS: Genotyping by LPL gene was performed in 103 patients with SEA. Of them 13 patients survived myocardial infarction (MI), 29 patients had diabetes mellitus. RESULTS: Incidence of alleles of HindIII DNA-polymorphism of LPL gene both in healthy and IHD patients is comparable with that in the West European populations. CONCLUSION: Genotype H+H+ of LPL gene is one of the markers of predisposition to MI, while allele H- is one of the resistance marks.

Adult↗
PubMed2002

[ACE gene I/D-polymorphism and hereditary predisposition to myocardial infarction].

The authors compare distribution of genotype frequencies and alleles of I/D of ACE gene polymorphism in patients with various forms of ischemic heart disease (IHD): with acute myocardial infarction (MI), stable effort angina (functional class II-III); in patients with postinfarction cardiosclerosis (PICS). A relationship was found between I/D polymorphism and acute MI. Frequency of DD genotype in MI patients was 0.57, in controls--0.21, p < 0.0001, RR = 4.9. The DD genotype may serve a marker of hereditary predisposition to MI. Genotype DD frequency in the group with acute MI was higher than that with PICS. In acute MI frequency of allele D was 0.76, in PICS--0.51, p < 0.0005. It is suggested that low frequency of genotype DD in the PICS group results from higher lethality of patients with DD genotype in the nearest rehabilitation period. Patients with repeated MI have a significantly higher frequency of genotype DD and complications after MI. Thus, there is a relationship between insertion-deletion polymorphism of ACE gene and myocardial infarction. Deletion DD genotype raises the risk to develop MI and probability of life-threatening complications and repeated MI.

Bacterial Outer Membrane Proteins↗
PubMed1997

[DNA-diagnosis of bulbospinal muscular atrophy (Kennedy's disease)].

Bulbospinal muscular atrophy--a rare disease with X-linked recessive type of inheritance. It is caused by expansion of trinucleotide repetitions in the gene of androgenic receptor (AR). We elaborated a method of DNA-testing with usage of nonradioactive registration of mutant alleles of AR gene. DNA-diagnosis was performed in 16 patients with clinical pattern of bulbospinal muscular atrophy and diagnosis was confirmed in 11 patients. Carriage of mutant alleles was found in 7 women--relatives of the patients. Presymptomatic diagnosis revealed the presence of mutant alleles in 2 boys. Unstability of alleles of mutant AR gene was observed in one family: in sons there was more (upon 5) of CAG-triplets.

Adolescent↗
PubMed1995

Prenatal diagnosis of spinal muscular atrophy in Russia.

Ninety-two families with spinal muscular atrophy (SMA) applied for genetic counselling and further prenatal diagnosis. To minimize expenses, only one tightly linked informative marker was determined in the course of preliminary examination, and non-radioactive allele detection was preferably used. Four prenatal diagnoses of SMA type I, four of SMA type II, and one of SMA type III were made. This trial programme shows the considerable requirements, importance, and potential effectiveness of prenatal prediction of SMA in Russia.

Adolescent↗
PubMed1991

[The preclinical DNA diagnosis of Huntington's chorea].

Presymptomatic DNA diagnosis of Huntington's chorea (HC) was made for two sons of a patient affected with the disease using amplification of the DNA fragment in the area of locus G 8 linked with HC gene. That fragment contains a polymorphous site in the area of restrictase recognition Hind III, being of information value as regards the family under examination. The familial analysis with the use of the DNA diagnosis data makes it possible to exclude the inheritance of HC gene for both the sons of the patient with a probability of 96%.

Adolescent↗
PubMed1991

[A benign variant of the course of Duchenne muscular dystrophy in a child with short stature].

The authors describe a case of a benign variety of progressive Duchenne type muscular dystrophy in a 8-year-old short-stature boy. Provide the electromyographic and electroneuromyographic data, measurements of the growth hormone in blood serum and osseous age. Make suggestions about coupled inheritance of progressive Duchenne type muscular dystrophy and short stature . The latter one is likely to be attended by a decrease of anabolic processes, which may determine a more benign course of the myodystrophic process.

Child↗
PubMed1991

[Prenatal DNA-diagnosis of Duchenne muscular dystrophy].

Two prenatal diagnoses were carried out by the technique of intragenic polymorphous marker detecting heterozygosity in pregnant women in the families with cases of Duchenne muscular dystrophy. In both cases the DNA fragment from pERT87-15 region was amplified. This fragment includes a polymorphous site in BamHI region of recognition. DNA analyses of the families members have been made and the genetical risk has been calculated by the Bayes method. The prognoses for both fetuses are good.

Base Sequence↗
PubMed1990

[DNA-diagnosis of carriers of the Duchenne muscular dystrophy gene].

Duchenne muscular dystrophy carrier detection has been performed by using probes XJ1.1 (intragenic probe) and probe 754 for a girl. The carrier probability was estimated by means of a computer program GenRisk combining pedigree and DNA-probe data and turned out to be 95%.

Alleles↗
PubMed1990

[Carrier detection and prenatal diagnosis of Duchenne's muscular dystrophy based on DNA analysis].

Seven families with histories of Duchenne's muscular dystrophy underwent DNA diagnosis. The daughters of those consulted were examined for the carriage in 4 families. Their carriage was rejected or confirmed. Prenatal diagnosis was made in 2 families. In another family an abortion preceded obtaining molecular-genetic evidence. Probes 754, p20, XJI.I and primers for amplification of the site pERI87-15 containing a polymorphic locus were employed. The genetic risk was assessed using the computer program GenRisk adjusted for family history and DNA test allowances.

Adult↗
PubMed1988

[Mitomycin C induced structural changes in heterochromatic regions of human chromosomes 1, 9, 16 and Y].

Aberrations and variations in the heterochromatic blocks of chromosomes 1, 9, 16 and Y were found under the influence of mitomycin C in cultured lymphocytes of peripheral human blood. Lymphocytes were cultured during 96 hours, mitomycin C in final concentration of 0.3 mkg/ml was present in the culture during the latest 24 hours of culturing. Different changes in the heterochromatic regions of chromosomes were found in approximately 30% of cells: in 6.3% of cells mitotic chiasmata were indicated. In 9.5% of cells isolocus breaks were observed in heterochromatic region of chromosome 1 in segment 1q11. In the latter case this may be a fragile site detected under the influence of mitomycin C on the lymphocytes.

Cells, Cultured↗
PubMed1987

[Chromosome instability in diseases of the nervous system].

The authors review both their own findings and literature data about chromosomal instability in neurologic diseases. The genetic mechanisms responsible for the development of chromosomal instability and its role in the pathogenesis of different diseases of the nervous system are discussed.

Chromosome Aberrations↗
PubMed1987

[Chromosome instability in multiple sclerosis].

The results of the study have confirmed the existing data on an elevation in the spontaneous levels of sister chromatid exchange (SCE) in multiple sclerosis patients as compared to control subjects (in the patients the mean number of SCEs per cell was 10.5 +/- 0.3 whereas in the control group it was 8.2 +/- 0.25).

Adult↗
PubMed1983

[Rare case of mosaicism for chromosome 18, karyotype: 46, XX, del(18) (p11)/46, XX, i(18q)].

Rare mosaicism of chromosome No 18 is described. The proposita is 5.5 years old and has two cell clones: 50% of cells are monosomic for 18p and 50% have isochromosome i18q. The ratio of these clones (1:1) is found to be similar at the age of the proposita 2.5 and 5.5 years. The proposita has some phenotypic characters of both 18p- (ptosis, epicanthus, deformed carious teeth, falled back sternum etc.) and trisomy 18q (contraction of external auditory meatus, femur luxatus congenitus etc.) syndromes. A possible mechanism for the origin of such a mosaicism is discussed.

Aneuploidy↗