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Biomedical subjects

G Brenci

Publications and source records attributed to G Brenci.

At least 37 records · Page 2Linked to original sources
PubMed1980

[The genetic incidence on QT interval values in ECG (author's transl)].

On the grounds of the well-known finding of the familial incidence of the elongated QT interval in various conditions, a research has been carried on in order to point out the possible genetic conditioning of this electrocardiographic pattern. From the analysis of the QTc values in the components of 28 families of carriers of "labile pseudo-ischemic T wave" it comes out that the QTc phenomenon is conditioned by the heredity. The distribution of the aplotypes HLA does not permit to settle any correlation with these genetic markers on account of the restricted number of the examined cases.

Adult↗
PubMed1979

Sleep and dream characteristics in twins.

A study of sleep and dream characteristics has been carried out by questionnaire on a sample of 77 MZ and 76 DZ same-sex twin pairs of two age groups, 6-8 and 16-18 years. Genetic effects could not be detected in the younger age group and appeared to be rather limited in the older one, possibly as a result of the limited variability of the considered variables and of the levelling influence of the common environment.

Adolescent↗
PubMed1979

Twin azygotic test for the study of hereditary qualitative traits in twin populations.

Following previous formulations of a model of qualitative analysis of twin population data independent of zygosity, a new Bayesian approach has been developed. The present model can be applied to any qualitative genetic trait in twin population data, provided no specific source of variation be introduced by the twin condition, and allows not only estimation of the frequencies of mono- and dizygosity as well as the gene frequencies, but also verification of the trait's mode of inheritance.

Bayes Theorem↗
PubMed1978

A hundred years of gemellology.

Over the past hundred years, since Sir Francis Galton first pointed out its scientific value, the study of twins has considerably widened its scope and significance. Gemellology has come to represent an important branch of human genetics and to be applied to the most diverse fields of biomedical and behavioral research, besides obviously contributing to the study of the specific biological, medical, and psychological aspects of the twin condition. More recently, then, it has in turn originated a new branch of modern genetic research, chronogenetics. Finally, sponsored and coordinated by the Mendel Institute in Rome, an International Society for Twins Studies has developed.

Female↗
PubMed1977

The chronogenetics of caries in primary dentition.

A chronogenetic analysis of caries has been carried out in a sample of 100 twin pairs (27 MZ, 64 DZ, 9 UZ) aged 3-8 years, taking into account the number of decayed teeth and the intensity and severity of caries. Heritability estimates, calculated for each of the various parameters considered, support the hypothesis of a genetic control of the time of onset of caries.

Child↗
PubMed1975

Twins as a natural test of chronogenetics.

Monozygotic twins are the best witnesses of the existence of a hereditary biological time, because they would not be identical if they had not also inherited the times of appearance and duration of their common hereditary information. The authors gave the name "chronogenetics" to this branch of genetics which concerns the temporal dimension of the gene and the mechanisms of transmission and manifestation of the temporal characteristics. The "Ergon/Chronon System" is suggested as a model to explain chronological heredity in terms of molecular genetics. An example is offered of a chronogenetic analysis of puberty based on the study of puberty times in 157 female and 154 male twin pairs. This shows the hereditary conditioning of numerous chronogenetic parameters, the extrapolation of conclusions concerning the phenomenon of puberty, and the establishment, in this regard, of a borderline between hereditary and physical times. A picture is finally drawn exemplifying Normal Hereditary Times (gametic, auxologic, homeostatic, and old-age recession times) and Pathological Hereditary Times (auxologic, cardiovascular, neoplastic, immunitary, metabolic, and antitoxic pathology times). Provisional chronogenetic developments are indicated, and a possible advancement toward the recycling of the gene is hoped for.

Chronology as Topic↗
PubMed1971

[Enzyme genetics].

Explore the source record for details and available documents.

Alkaline Phosphatase↗