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Biomedical subjects

M Sela

Publications and source records attributed to M Sela.

406 records · Page 23Linked to original sources
PubMedDate not supplied

Dentinoenamel junction area of a resorbing permanent incisor studied by means of scanning electron microscopy.

The surfaces of enamel and dentin that had become separated from each other presumably in the region of the dentinoenamel junction were examined. The enamel surface at the junction was scalloped; the scallops were made of enamel rods. The dentinal surface showed a mirror image picture, tubular in nature. Both surfaces were granulated, which may indicate that apatite crystals from the two tissues intermingle there.

Child↗
PubMedDate not supplied

Structural components responsible for peptide antigenicity.

The conformation of a peptide defines its antigenic specificity. In most cases, a free peptide is in a random form, whereas the same peptide within a protein has a defined conformation. Immunological cross-reactions between the two are rare. Nevertheless, there are cases where an anticonformational antibody may transconform (change the conformation of) the free peptide, allowing the reaction to occur. Based on such considerations, synthetic vaccines against infectious diseases may be constructed. The same is true for autoimmune diseases, where, at least in one case--that of the exacerbating-remitting type of multiple sclerosis--we have developed a polypeptidic drug-vaccine, copolymer 1 (denoted Copaxone), capable of suppressing the autoimmune phenomena in a specific way. This drug-vaccine has been approved for treatment by the US Food and Drug Administration (FDA).

Animals↗
PubMedDate not supplied

The effect of a water soluble adjuvant on the immune response to synthetic polypeptides.

The effect of a water soluble adjuvant (WSA) extracted from mycobacteria on the immune response to synthetic polypeptides has been studied in rabbits and inbred mice. WSA increased the antibody response of rabbits to the synthetic polypeptide poly(Tyr,Glu)-poly(DLAla)--poly(Lys) designated (T,G)-A--L when injected together with either incomplete or complete Freund's adjuvants (FIA or FCA). As compared to the respective controls, the effect of WSA was more pronounced when injected with FIA. No detectable antibody titre was observed in rabbits immunized with (T,G)-A--L and WSA administered in an aqueous medium. WSA had no enhancing adjuvant effect on the antibody response of C3H.SW high responder mice to (T,G)-A--L when given either with FIA or with FCA. However, the antibody titres of C3H/HeJ and SJL low responder mice to (T,G)-A--L were increased by WSA when injected in combination with FIA or FCA. The immune responses of mice to two other synthetic polypeptides poly(Phe,Glu)-poly(DLAla)--poly(Lys), designated (Phe,G)-A--L, and poly-(Tyr,Glu)-poly(Pro)--poly(Lys), designated (T,G)-Pro--L, were not affected by the addition of WSA. Thus, WSA "corrects" selectively the genetic defect of low responder mice to synthetic antigens.

Adjuvants, Immunologic↗