Biomedical subjects

N Feingold

Publications and source records attributed to N Feingold.

At least 73 records · Page 4Linked to original sources

PubMed1976

Anti-EBV antibody titers in non-Hodgkin lymphomas.

Antibody titers to Epstein-Barr virus (EBV)-related antigens, i.e. viral capsid antigen (VCA), the D and R components of the early antigen (EA) complex and the EBV-associated nuclear antigen (EBNA), were determined in a series of 86 patients with non-Hodgkin lymphomas and in 150 matched control subjects. The lymphoma patients belonged to four histological groups: diffuse, nodular, hyperbasophilic malignant lymphoma (HML) and unclassified. The EBV-related serological data were compared to the incidence of antibodies to other herpes viruses, i.e. cytomegalovirus (CMV), herpes simplex virus (HSV) and varicella zoster virus (VZV), and correlated with immune disorders, which are particularly frequent in the HML type of lymphoma. The results revealed a significantly higher incidence of anti-EA-D titers in lymphoma patients and slight but significant increases in the geometric mean anti-VCA titers in the HML and unclassified group of patients. These elevated anti-EBV titers in patients were not associated with an increase in titres of antibodies to other herpes viruses. They did not correlate with the signs of immune deficiency observed or with the incidence of auto-antibodies.

Adolescent↗

PubMed1976

Polygenic regulation of antibody synthesis to sheep erythrocytes in the mouse: a genetic analysis.

Selective breeding for the character "agglutinin production to heterologous erythrocytes" was performed on random-bred populations of albino mice. Two types of selection were carried out: Selection I: the first 6 generations were immunized with sheep erythrocytes (SE), then SE and pigeon erythrocytes (PE) were alternated at each generation to avoid the interference of maternal antibody. Selection II: all generations were immunized with SE 60-70 days after weaning in order to eliminate the maternal antibody. Both were selected for the character agglutinin titer 14 days after immunization using an optimal dose of erythrocytes. Selection I. The mean response to SE of the foundation population was 7.36 +/- 1.60. The selection limit was attained between the 15th and the 20th generation. The F20--F30 were considered as homozygous for the character investigated. The mean SE agglutinin titers were 9.15 (1/2820) in the high responder line and 2 (1/20) in the low responder line. This corresponds to 140-fold interline difference in agglutinin titers. SE agglutinins determined in F1 hybrids, F2 hybrids and backcrosses obtained from F23--F29 demonstrated incomplete dominance of high responsiveness (23-29%). The inbreeding coefficient produced by close colony breeding was 0.55 in high and 0.71 in low responders at the 20th generation when both lines were homozygous with respect to agglutinin synthesis. Selection II. The mean response of the foundation population to SE was 7.79 +/- 1.56. The selection limit was attained in F14--F17 generations that were considered homozygous for the character investigated. The mean SE agglutinin titer was 9.2 (1/2900) in high responders and 2.8 (1/35) in low responders, which is an 83-fold interline difference in agglutinin titers. The results of both selections indicate that the character agglutinin synthesis is subject to polygenic regulation. The heritability (h2) of this character was estimated to be between 0.18 and 0.36 (range between the extreme values of Selections I and II.

Animals↗

PubMed1975

Genetic control of macrophage functions. I. Polygenic regulation of phagocytosis stimulation produced by Glyceryl Trioleate.

The phagocytic index K, established from the rate of blood clearance of colloidal carbon, measures the phagocytic activity of RE macrophages in contact with the circulating blood. The intravenous injection of glyceryl trioleate (triolein) produces a marked stimulation of the phagocytic activity of RE macrophages. This response is higher in the female than in the male mice. The phenotypic character "responsiveness of macrophage to triolein" presents large individual variants in population of random bred albinos mice. This character is submitted to polygenic regulation. Starting from a foundation population of 25 males and 25 females random bred albinos, mice, two lines were separated by selective breeding for the character "responsiveness to triolein": a "high" responder line, KTH, and a "low" responder line, KTL. After 26 consecutive generations of selective breeding, KTH mice present a very high response to triolein while KTL mice are almost irresponsive. The heritability of this character (h2) calculated from the interline divergence is of 12% plus or minus 1. This value of h2 indicates that the character investigated is determined by the cumulative effect of a group of about 27 independently segregating loci. The distribution of the character in (KTH plus KTL)F1 and their backcrosses with parental lines suggests that low responsiveness is dominant over high responsiveness. The genetic regulation of responsiveness to triolein is independent from the dose administered. These results are discussed in relation to the importance of genetic factors controlling macrophage functions involved in lipid metabolism and in the specific mechanisms of immunity.

Animals↗

PubMed1975

Gm and Inv allotypes in a Gypsy sample.

Serum samples from 226 Gypsies were tested for Gm(1,2,4,5,8,10,11,14,17,21,23,25) and for Inv(1,2). The Gm phenotypes found are very numerous and the more frequent among this population are: Gm(4,5, 8,10,11,14,17,23,25) and Gm(1,2,4,5,8,10,11,14,17,21,23,25). All the phenotypes except three can be explained by nine haplotypes: Gm4,5,8,10,11,14,23,25, Gm1,4,5,8,10,11,14,23,25, Gm4,5,8,10,11,14,25, Gm1,17,21, Gm1,10,11,17,25, Gm1,2,17,21, Gm1,8,17,21, Gm1,8,17,21,23 and Gm1,5,10,11,14,17. The haplotypes Gm1,17,21, Gm1,2,17,21, Gm4,5,8,10,11,14,25 (with or without Gm[ 3]) are all three common among Caucasoids, Gm1,4,5,10,11,14,23,25 (common among Mongoloids) and Gm1,5,10,11,14,17 (common to Negroids). For the Inv system, this population possesses a very low frequency of Inv(1) and Inv(2).

Ethnicity↗

PubMed1975