Abstract
Antiribosomal P autoantibodies are detectable in 12-16% of patients with systemic lupus erythematosus. To assess whether antiribosomal P autoantibodies could be useful as a novel form of immunotherapy for pancreatic cancer. Three pancreatic cancer cell lines were incubated with antiribosomal P or normal human immunoglobulin. Viability was assayed with MTT, and apoptosis was detected by TUNEL. MIA PaCa-2 cells were injected into athymic mice. Animals were treated with intraperitoneal antibody or control immunoglobulin. Serum antibody levels were measured by ELISA. Tumor nodule size was measured weekly. Binding of the antibody to tumors was demonstrated with fluorescent microscopy. Antiribosomal P antibody inhibited pancreatic cancer cell proliferation up to 54.6% (p < 0.01) and was associated with a threefold increase in the rate of apoptosis (p < 0.05). Tumor volume after 4 weeks of treatment was 23.2 mm3, versus 141.5 mm3 for the control group (p < 0.05). Apoptosis rate within the nodules was increased twofold, to 11.4%, in comparison with control (p < 0.05). Antiribosomal P autoantibody at levels similar to those that can exist in SLE inhibits the growth of pancreatic cancer cells, in vitro and in vivo. The mechanism involves surface binding and apoptosis.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.