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These are incredible results! Happy tears
Summary of Results:
In the Phase 2 clinical trial of VX-440 in combination with ivacaftor and tezacaftor (VX-661), the 18 participants in the study with a single F508del mutation who received the 600 mg dose of VX-440 had a
12 percent increase in lung function,
substantial improvement in their quality of life, and a decrease in sweat chloride of 33.1 after four weeks of treatment. The 20 participants in the study with two copies of the F508del mutation who received the 600 mg dose of VX-440 had a
9.5 percent increase in lung function and a decrease in sweat chloride of 31.3 after four weeks of treatment.
In the Phase 2 clinical trial of VX-152 in combination with ivacaftor and tezacaftor (VX-661), the 10 participants in the study with a single F508del mutation who received the 200 mg dose of VX-152 had a
9.7 percent increase in lung function and a decrease in sweat chloride of 14.1 after two weeks of treatment. The 10 participants in the study who have two copies of the F508del mutation who received the 200 mg dose of VX-152 had a
7.3 percent increase in lung function and a decrease in sweat chloride of 20.9 after two weeks of treatment.
In the Phase 1 clinical trial of VX-659 in combination with ivacaftor and tezacaftor (VX-661), participants in the study with a single F508del mutation who received the 120 mg q12 dose of VX-659 had a
9.6 percent increase in lung function and decrease in sweat chloride of 41.6 after two weeks of treatment.
Pregnancy Risks
Women of childbearing age in the VX-440 study were required to use contraception because of worries about the drug’s effects on fetuses, which may argue in favor of VX-152, where the same risk wasn’t seen, according to Jennifer Taylor-Cousar, a cystic fibrosis doctor at National Jewish Health in Denver and investigator in one of the studies who is consulting for Vertex on its final-stage study plans.
“To have to decide not to get pregnant would be very difficult for our patients,” Taylor-Cousar said by phone. “As women are healthier and healthier with CF and living longer they definitely want to have families.”
Patients generally tolerated the drugs well, according to Vertex, though some side effects cropped up. One patient taking a triple combination with VX-440 had higher-than-normal liver enzymes, which can suggest liver damage, and stopped taking treatment. Another taking VX-152 stopped taking the drug cocktail after contracting pneumonia.