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2002 OCT 3 - (NewsRx.com & NewsRx.net) -- NPS Pharmaceuticals, Inc., (NPSP) reported interim results from an ongoing 24-month preclinical carcinogenicity study with Preos, its proprietary drug candidate for treating osteoporosis.
A planned histopathological evaluation of a subset of rats confirmed that osteosarcoma has not yet been observed in study animals. The company cautioned that this interim result reflects 12 months of treatment with Preos and that final results will be available after the 24-month study is completed in 2003.
The absence of osteosarcomas after 12 months of dosing was expected based on previously reported studies using peptides related to PTH such as teriparatide or analogs of parathyroid hormone-related peptide (PTHrP). It should be noted that in the teriparatide study an increased incidence of osteosarcoma in rats was observed in the final 12 months of the study.