The efficacy of Xialine in patients with xerostomia resulting from radiotherapy for head and neck cancer: a pilot-study.

Changes in subjective sensations due to xerostomia before and after administration of Xialine, a xanthan gum-based saliva substitute, were evaluated in 30 patients with radiation-induced xerostomia using the QLQ-H&N35. Xerostomia in general decreased with both Xialine and placebo to almost the same degree. A trend was seen for Xialine to improve problems with speech and senses.

Lysis of syngeneic tumor B cells by autoreactive cytotoxic T lymphocytes specific for a CD19 antigen-derived synthetic peptide.

Cytotoxic T lymphocytes (CTL) play an important role in the destruction of immunogenic tumors. A novel category of target antigens for CTL concerns normal differentiation antigens as most clearly demonstrated in human melanoma. In the case of B-cell cancers, differentiation antigens normally expressed on B cells may be useful targets. In this report, we have focused on the murine B-cell differentiation antigens CD19 and CD20. We have identified 18 peptide sequences on the basis of major histocompatibility complex (MHC) class-I binding-motifs as candidates for the induction of autoreactive CTL. Six of the peptides were capable of binding efficiently to either Kb or Db and were subsequently used for in vivo induction of CTL. Vaccination with each of three peptides led to peptide-specific CTL. Two peptides were derived from the mCD20 antigen and one from the mCD19 antigen. CTL specific for the mCD19-derived peptide were also capable of killing a syngeneic B-cell tumor line. Recognition of the peptide as well as the tumor cells was shown to be Kb restricted. This is the first report to show that autoreactive CTL recognizing peptides derived from B-cell-specific differentiation antigens can be generated by vaccination with a synthetic peptide.