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Biomedical subjects

C Brailovsky

Publications and source records attributed to C Brailovsky.

At least 19 recordsLinked to original sources
PubMed1988

Mitogenic, immunoadjuvancy, and genetic studies on fatty acyl maltose.

Three synthetic glycolipids, maltose tetrapalmitate (MTP), maltose hexastearate (MHS), and maltose hexalinoleate (MHL) prepared as nontoxic lipid A analogs, and Escherichia coli lipopolysaccharide (LPS) were assayed for their mitogenic activity using spleen lymphocytes in nine inbred mouse strains and three F1 hybrids. The MTP and LPS were also assayed for their ability to enhance plaque-forming cell (PFC) responses using sheep red blood cells as the antigen in the same inbred mouse strains and F1 hybrids, The mitogenic activity of synthetic glyco-lipids was several fold lower than that of LPS and MHL was inferior to MTP and MHS. DBA/2J was the most responsive strain for MTP and DBA/1J and C3H/HeJ the least. The mitogenic activity of MTP was generally in agreement with the PFC response stimulation by it. Low-dose cyclophosphamide treatment of mice synergized MTP for PFC response augmentation. Genetic studies on MTP mitogenicity revealed that 90% of responder DBA/2J X nonresponder C3H/HeJ F1 hybrids had intermediate mitogenic activity. Among F2, 73% had intermediate-high activity and 27% were nonmitogenic. Among F1 X C3H/HeJ backcrosses 11% had high, 56% intermediate, and 33% had no mitogenic activity, whereas, for the F1 X DBA/2J backcross, 14% had high, 36% intermediate, and 50% low or negligible activity. The data favored a single gene for MTP activation of immune cells.

Animals↗
PubMed1988

Prophylactic maltose tetrapalmitate and bacillus Calmette-Guerin immunotherapy of recurrent superficial bladder tumors: preliminary report.

We divided randomly into 3 groups 47 patients with recurrent superficial transitional cell carcinoma of the bladder: group 1-15 controls who underwent transurethral resection only, group 2-17 patients who underwent transurethral resection and bacillus Calmette-Guerin therapy, and group 3-15 patients treated by transurethral resection and maltose tetrapalmitate. Mean followup was 22.93 months for the controls, 28.0 months for group 2 and 24.4 months for group 3. The recurrence rate per 100 patient-months was 11.34 in the controls, 7.4 in group 2 and 7.19 in group 3, and the recurrence index per month was 0.113, 0.070 and 0.072, respectively. The recurrence rate and recurrence index per month were significantly decreased in the treated groups compared to the controls (p less than 0.005). There was no significant difference between the bacillus Calmette-Guerin and maltose tetrapalmitate groups. Invasive carcinoma developed in 60 per cent of the controls, 29.4 per cent of group 2 and 20 per cent of group 3. Invasive carcinoma required cystectomy or definitive radiotherapy. Bacillus Calmette-Guerin caused irritation of the bladder mucosa, while maltose tetrapalmitate did not have any side effects.

Adult↗
PubMed1973

Growth of normal and transformed rat embryo fibroblasts: effects of glycolipids from Salmonella minnesota R mutants.

Addition of glycolipids obtained from Salmonella minnesota R mutants to normal, spontaneously transformed, and SV40-transformed rat embryo fibroblasts in culture results in an inhibition of growth of transformed cells but not of normal cells. In the presence of the glycolipid with the smallest carbohydrate chain length, spontaneously transformed cells stop growing when they reach confluency. Inhibition of growth of transformed cells is inversely related to the chain length of the core sugars. Glycolipid mR595 is shown to bind with the cell membrane of transformed cells and elicits an augmentation in the intracellular level of cyclic AMP. Normal cells bind relatively less glycolipid mR595 and show a lower percent of increase in cyclic AMP due to glycolipid mR595 than do transformed cells.

Animals↗
PubMed1973

Ganglioside patterns and phenotypic characteristics in a normal variant and a transformed back variant of a simian virus 40-induced hamster tumor cell line.

Ganglioside patterns of a cloned Simian virus 40- (SV40) induced hamster tumor cell (Cl(2)TSV(5)-S), its normal variant (Cl(2)TSV(5)-R) which are Cl(2)TSV(5)-S gradually adapted to grow in the presence of 2 microg/ml actinomycin D and exhibit certain normal phenotypic characteristics, and its back variant (Cl(2)TSV(5)-RR), which are Cl(2)TSV(5)-R cells grown in the absence of actinomycin D for more than 60 passages and which exhibit greater phenotypic similarity to Cl(2)TSV(5)-S cells, have been analyzed. All three cell lines contain N(acetylneuraminyl) galactosylglycosyl ceramide (hematoside, GM(3)), N-acetylgalactosaminyl (N-acetylneuraminyl) galactosylglucosyl ceramide (GM(2)), and a higher ganglioside tentatively identified as disialohematoside. However, Cl(2)TSV(5)-R have more GM(2) than Cl(2)TSV(5)-S whereas Cl(2)TSV(5)-RR contain an intermediate amount of GM(2). The amount of GM(2) is correlative with the activity of UDP-N-acetylgalactosamine: hematoside N-acetylgalactosaminyl transferase in the extract of the three cell lines and with their agglutination by wheat germ agglutinin.

Animals↗