Pharmaxis - Model PXS-5505 - Oral pan-LOX Inhibitor
Pharmaxis has developed an oral drug inhibiting all lysyl oxidase family members. The compound has shown significant reductions in fibrosis in in-vivo models of kidney fibrosis, lung fibrosis, myelofibrosis and pancreatic cancer. This all-encompassing LOX inhibitor is well positioned for the treatment of severe fibrosis as well as cancer with prominent stroma (connective tissue) or fibrotic metastatic niches. Pharmaxis plans to initially develop the compound for myelofibrosis.
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Pharmaxis is also collaborating with a number of A...
Pharmaxis is also collaborating with a number of Australian and international clinical and academic groups with interest in LOX inhibition, including:
- Myelodysplastic syndrome
Germany - Liver Cancer
Rochester (NY) - Pancreatic Cancer
Sydney (Garvan Institute of Medical Research), Rochester (NY) - Melanoma
Houston - Glioblastoma
MD Anderson (Houston) and Charlie Teo Foundation - Head and Neck Cancer
Boson
A Phase 1 clinical trial in healthy volunteers commenced in February 2019 and reported in April 2020. The Phase 1 trial demonstrated a well-tolerated drug that effectively inhibits all enzymes in the lysyl oxidase family that are involved in fibrosis. Long term toxicity studies were completed clearing the way for 6-month phase 2 studies in several cancers with the opportunity to demonstrate disease modifying efficacy.
In mid 2020 the US Food and Drug Administration granted orphan-drug designation for the pan-LOX inhibitor PXS-5505 for the treatment of myelofibrosis. In August the FDA completed a safety review of the company’s Investigational New Drug (IND) application PXS-5505 and gave Pharmaxis permission to proceed with a phase 1c/2 clinical trial for the treatment of myelofibrosis in adults. Read the media release.
A Phase 1c/2a clinical trial in myelofibrosis patients commenced in February 2021. The study aims to demonstrate that PXS-5505 is safe and effective as a monotherapy in myelofibrosis patients who are intolerant, unresponsive or ineligible for treatment with approved JAK inhibitor drugs. The dose escalation phase of the study that is being conducted at sites in Australia and South Korea, aims to select the optimum dose of PXS-5505. This first phase, that will recruit up to 18 patients, is expected to conclude and report in 2H 2021. It will be followed by a six-month dose expansion phase (24 patients) to evaluate safety and efficacy. Sites in other countries including the USA will be added for the dose expansion phase.
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