Biomedical subjects
Publications and source records attributed to E K Ginter.
Distances computed from vital statistics using the Euclid formula and thus termed "vital" are proposed for use in population studies. An example of use of these statistics for comparison of four large geographically separated Russian populations is given.
The index of migration, the parameter of surname diversity, and the values of entropy and redundancy of the distribution of surnames, proposed by Barrai et al. [1], were determined for populations of Kirovskaya and Kostromskaya oblasts. The relationship of these indices with previously used population characteristics, such as the Wright's F st parameter, the index of endogamy, and the burden of autosomal recessive and autosomal dominant Mendelian pathology, was determined. Further use of these parameters in population genetic research is considered.
The genetic structure of human populations inhabiting Kirov region is described. The effect of genetic drift on geographical distribution of families with autosomal recessive diseases is analyzed. Genetic distances were calculated from frequencies of occurrence of certain family names and frequencies of autosomal recessive genes encoding hereditary diseases. Cluster analysis based on matrices of genetic distances showed that descriptions of the genetic structure obtained using these two methods are in good agreement with one another. It is shown that genetic drift is the principal factor determining the territorial distribution of autosomal recessive genes within population of Kirov region. This conclusion is based on local accumulation of families suffering from autosomal recessive diseases.
Familial keratosis palmaris et plantaris (KPPF) is characterized by extreme keratinization and desquamation of the skin of the palmar and plantar surfaces of the hands and feet. We have mapped the causative genetic defect to an 8 cM interval on 17q12-24 in or close to the acidic keratin (type I) gene cluster. We show that KPPF co-segregates with a rare, high molecular weight allele of an insertion-deletion polymorphism in the C-terminal coding region of the keratin 10 gene (Z = 8.36 at theta = 0.00) and segrates as a true autosomal dominant trait. Some pedigrees with familial hyperkeratosis of the palms and soles have co-inherited diseases such as congenital malformations and familial cancers. Our analysis provide a region which should be investigated for contiguous gene syndromes in such pedigrees.
Explore the source record for details and available documents.
The human "fingerprints" detected by the phage M13 DNA probe from 40 simple families with some presumably genetic malformations were observed. When only one parent had a specific band, the mean segregation frequency of all the electrophoretic bands detected was equal to 0.485, which confirmed the hypothesis about the Mendelian inheritance and high level of heterozygosity of hypervariable loci. The mean new measure of similarity between the parents calculated by Li C.C. was 0.54 (this measure within only fathers and only mothers was equal to the mean population level of similarity 0.41).
The frequencies of different electrophoretic bands in DNA "fingerprint" detected by the phage M13 DNA probe in six Russian populations from the Kirov district and Krasnodar, one from Chuvashia and one from Tuva were compared with each other and pseudo-genetic distances by Nei were calculated. The results corresponded well with a presumable extent of similarity between the populations observed.
All the cases of hereditary motor and sensory neuropathy (HMSN) in an eastern part of Kirov region (Russian north-east) were ascertained (N = 42 including 11 persons with pre/subclinical forms; m: f = 1). HMSN prevalence is 15.95 +/- 2.47.10(-5) being higher in rural than in urban populations. The distribution of HMSN families (total 16) in 9 districts of the region is uneven. HMSN is the most common of all hereditary muscular disorders in the region. Autosomal dominant inheritance was established in 12 families, AD gene frequency is 10.90 +/- 2.90.10(-5) gene penetrance being 90%. Sporadic cases were few (N = 4; 9.76%). No proven autosomal recessive or X-linked inheritance was found out.
In 1977 WHO published in the Bulletin a Memorandum on Methods for the Detection of Haemophilia Carriers. This was produced following a WHO/WFH (World Federation of Haemophilia) Meeting of Investigators in Geneva in November 1976, and has served as a valuable reference article on the genetics of haemophilia. The analyses discussed were based on phenotypic assessment, which, at that time, was the only procedure available. The molecular biology revolution in genetics during the 1980s made enormous contributions to our understanding of the molecular basis of the haemophilias and now permits precise carrier detection and prenatal diagnosis. WHO and WFH held a joint meeting on this subject in February 1992 in Geneva. This article is the result of these discussions.
The study of location of the gene for inborn dominant nokhur kataracta is going on. No linkage of this gene with the locus of alpha-globin gene (16p13.3) and the locus (7q36-qter) was revealed. Additional evidence was obtained for a possible location of the gene for inborn dominant nokhur kataracta on the 14 chromosome. The maximal lod value equaled to 1.089 at theta = 0.20 in the analysis of kataracta genes and alpha-1-antitrypsin (14q32.1), and 0.846 at theta = 0.30 for the kataracta gene and D14S13 (14q32.1-q32.32). For the alpha-1-antitrypsin gene the maximal lod value was 2.24 at theta = 0.05.
The dependence of the load of autosomal recessive disorders on a variation of random inbreeding in the populations of the 9th Districts of the Kirov Province was investigated. The values of the Fst varied between different districts from 0.00021 to 0.0011 and the values of load of AR--from 0.73 to 2.01 affected per 1000. There is a close significant correlation (r = 0.90) between the parameters in the population studied which increased under analysis of the population considering the coefficients of random inbreeding.
Analysis of linkage between the gene of autosomal dominant tylosis and some loci with RFLP in 1, 14 and 17 chromosomes in the pedigree with this disorder was performed. A positive load score (0.729 at 0-0.20) for tylosis and D17S14 locus (DNA probe pTHH-59) was found.
The main purpose of this report is to present the nosological spectrum of hereditary diseases in 9 Districts of Kirov Province and to compare it with that studies earlier in other Russian populations. This comparison is undertaken in an attempt to define a "nucleus" of hereditary diseases in the Russian population studied. During this study 343 families with 546 affected were registered. The spectrum covered 55 different autosomal dominant, 14 autosomal recessive and 11 X-linked recessive hereditary disorders in the population under study. Some of these forms could be considered as common forms for the whole Russian population, because they were met in all Russian populations which were analysed. This conclusion is proved by the cluster analysis of genetic distances calculated on the basis of gene frequencies for autosomal recessive hereditary disorders.
The paper is concerned with the brief history of the Institute of Medical Genetics, USSR AMS. Recently it has been reorganized to the USR AMS Research Center of Medical Genetics which consists of two Institutes: the Institute of Human Genetics and the Institute of Clinical Genetics. The list of the departments and laboratories of both Institutes, their research programs and projects are summarized. The research programs are under discussion.
Medical-genetic study was carried out in the population of Kirov Province (population size about 120.000). 203 families with 334 affected with hereditary disorders were registered. The correctness of pathology classification for the inheritance type was confirmed by segregational analysis. The load of hereditary diseases in the population was: 1.25 +/- 0.06 for autosomal dominant, 1.37 +/- 0.07 for autosomal recessive and 0.22 +/- 0.06 for X-linked recessive disorders. It is suggested that variability in the values of the load of autosomal recessive disorders is determined to the large extent by genetic structure of the population.
Analysis of linkage between the gene of autosomal dominant congenital cataract and 10 polymorphic loci localized in 1, 2, 3, 4, 6, 13, 16 chromosomes was performed. Some loci were only informative for this purpose: Mucin located in 1q21, NH24 located in the 2-nd chromosome and Pi located in 1q21 32.17. No linkage was observed for the cataract gene and the loci located in chromosomes 1 and 2. The maximum estimate of likelihood is approx. 0.2 for the cataract gene and the Pi locus located in 14q32.1, though the value of the maximal lod score was only, 0.732.
Hypervariable "minisatellite" regions detected in human genome by wild-type phage M13 DNA were found to have high polymorphism and somatic stability. Analysis of individual specific patterns of hybridization of 44 human DNAs from the Kirov province is presented. Molecular weight of fragments varied from 2 to 6 kb. Mean frequency of a fragment in the population under study is p = 0.294 +/- 0.158. The mean number of fragments per individual is 11.6 +/- 1.8. Comparison between the Kirov population and that of Krasnodar studied earlier was carried out. The mean genetic distance between Kirov and Krasnodar populations calculated according to Nei is 0.2082. The possibility of using in population-genetic studies of hypervariable DNA markers having fingerprint type of hybridization is discussed.
Medico-genetical study of populations living in Krasnodar district was carried out. The mean value of genetic load contributed by autosomal dominant diseases composed 0.92 +/- 0.06, this value being 0.56 +/- 0.04 for autosomal recessive and 0.36 +/- 0.05 for X-linked recessive disorders per one thousand. Comparative analysis of genetical load in urban and rural populations demonstrated that they had no differences in relation to genetical load contributed by autosomal recessive and X-linked recessive disorders. At the same time, significant differences were noted between the populations concerning genetic load contributed by autosomal-dominant disorders.