Vibrational dynamics of poly(L-isoleucine).

Normal mode analysis and their dispersion for poly(L-isoleucine) are reported by using Urey Bradley force field and Fourier transform IR. The calculated frequencies are found to be in reasonably good agreement with the Fourier transform IRspectra. Experimental measurements reported by Wunderlich et al.

Renal transplantation with a current T negative but historical T and/or B positive cross-match.

We report our experience of 36 renal transplanted patients against a current T negative allo-cross-match, but historical T and/or B positive allo-cross-matches, whatever the result of the current B cross-match. Additionally, we have determined the immunoglobulin class of the antibody directed against B and T lymphocytes. The graft survival rate did not differ between the 36 patients forming the study group, and the 229 patients transplanted within the same period with negative T and B, on current and historical sera, cross-matches.

Recombinant porcine interferon-gamma activates in vitro porcine adherent mononuclear cells to produce interleukin 1.

The effect of recombinant porcine interferon-gamma (rPoIFN gamma) on in vitro production of interleukin 1 (IL-1) by porcine blood monocytes was studied. Three-day-old cultures of porcine adherent blood mononuclear cells were treated by doses of rPoIFN gamma for 3 or 6 days before lipopolysaccharide (LPS)-induction. While rPoIFN gamma alone had no effect, a combined treatment by rPoIFN gamma and LPS enhanced the IL-1 secretory potential of adherent mononuclear cells and, to a lesser extent, the level of cell-associated IL-1.

Discriminating between protective and enhancing HIV antibodies.

Most attempts to produce a vaccine against HIV-1 infection are utilizing envelope protein components. Hypothetically such vaccine candidates could stimulate production of antibodies that enhance HIV-1 infection via the macrophage route of entry and, consequently, cannot be detected in the conventional neutralization assay. To study this hypothesis we report an assay designed to evaluate the protective/enhancing activity of serum from seropositive immunized or infected individuals.