AbbVie (ABBV) Says Second Phase 3 Induction Study Confirms Upadacitinib Improved Clinical, Endoscopic and Histologic Outcomes in Ulcerative Colitis Patients

February 22, 2021 8:46 AM EST

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AbbVie (NYSE: ABBV) today announced that upadacitinib (45 mg, once daily) met the primary endpoint of clinical remission (per Adapted Mayo Score) and all ranked secondary endpoints in the Phase 3 induction study, U-ACCOMPLISH.1 In the study, 33 percent of patients receiving upadacitinib achieved clinical remission (per Adapted Mayo Score) at week 8 compared to 4 percent of patients receiving placebo (p<0.001).1 U-ACCOMPLISH is the second of two Phase 3 induction studies to evaluate the safety and efficacy of upadacitinib in adults with moderate to severe ulcerative colitis.1

"We remain steadfast in our pursuit of transforming the treatment landscape for people living with ulcerative colitis," said Tom Hudson, senior vice president of research and development, AbbVie. "These positive results confirm the findings of the previous induction study and underscore the potential impact upadacitinib could have on patients struggling to manage their disease."

In this study, all ranked secondary endpoints were met, including clinical, endoscopic and histologic outcomes.1 A greater proportion of patients treated with upadacitinib achieved clinical response compared to placebo, with 74 percent of upadacitinib-treated patients experiencing clinical response (per Adapted Mayo Score) at week 8 versus 25 percent of patients receiving placebo (p<0.001).1 Additionally, 63 percent of patients treated with upadacitinib achieved clinical response (per partial Adapted Mayo Score) at week 2 versus 26 percent of those receiving placebo (p<0.001).1 At week 8, 44 percent of patients treated with upadacitinib achieved endoscopic improvement versus 8 percent of patients receiving placebo (p<0.001).1 And significantly more upadacitinib-treated patients achieved histologic-endoscopic mucosal improvement at week 8 compared to patients receiving placebo (37 percent versus 6 percent; p<0.001).1

"People living with moderate to severe ulcerative colitis continue to suffer from the significant burden of this disease," said Silvio Danese, M.D., lead study investigator and head of the Inflammatory Bowel Diseases Centre at Humanitas Research Hospital, Milan, Italy. "I am very impressed with the consistent results seen in both ulcerative colitis induction studies, suggesting that upadacitinib could be a potential new treatment option for patients."

U-ACCOMPLISH Efficacy Results at Week 8*,1

Upadacitinib 45 mg, once daily

(n=341)

Placebo

(n=174)

Clinical remission (per Adapted Mayo Score)a,†

33%

4%

Clinical response (per Adapted Mayo Score)b,†

74%

25%

Endoscopic improvementc,†

44%

8%

Histologic-endoscopic mucosal improvementd,†

37%

6%

*Primary endpoint was clinical remission (per Adapted Mayo Score). Clinical response (per Adapted Mayo Score), endoscopic improvement and histologic-endoscopic mucosal improvement were ranked secondary endpoints. Not all ranked secondary endpoints are shown. All primary and ranked secondary endpoints achieved p-values of <0.001 versus placebo.

aClinical remission (per Adapted Mayo Score) is defined as stool frequency subscore (SFS) ≤1 and not greater than baseline, rectal bleeding subscore (RBS) of 0 and endoscopic subscore ≤1.

b Clinical response (per Adapted Mayo Score) is defined as a decrease from baseline in the Adapted Mayo score ≥2 points and ≥30 percent from baseline, plus a decrease in RBS ≥1 or an absolute RBS ≤1.

cEndoscopic improvement is defined as endoscopic subscore ≤1.

dHistologic-endoscopic mucosal improvement is defined as endoscopic subscore of 0 or 1 and Geboes score ≤3.1.

†Evidence of friability during endoscopy in subjects with otherwise "mild" endoscopy activity will confer an endoscopic subscore of 2.

The safety profile of upadacitinib (45 mg) was consistent with the safety findings in the previously reported Phase 3 induction study in ulcerative colitis and safety findings in previous studies across indications, with no new safety risks observed.1-6 During the 8-week study period, the most common adverse events observed in the upadacitinib group were acne, blood creatine phosphokinase increase and anemia.1 The increases in blood creatine phosphokinase were non-serious and did not lead to study drug discontinuation.1 Patients with blood creatine phosphokinase increase were usually asymptomatic and no cases of rhabdomyolysis were reported.1 Serious adverse events occurred in 3.2 percent of patients in the upadacitinib group and 4.5 percent of patients in the placebo group.1 Similar rates of serious infections (0.6 percent) were observed in the two treatment groups.1 No deaths, gastrointestinal perforation, malignancy, major cardiovascular or thromboembolic events were reported in the upadacitinib group.1 One case of venous thromboembolism (deep vein thrombosis and pulmonary embolism) and one case of gastrointestinal perforation was reported in the placebo group.1

Full results from the U-ACCOMPLISH study will be presented at a future medical meeting and submitted for publication in a peer-reviewed journal. Top-line results from the Phase 3 portion of the first induction study, U-ACHIEVE, were announced in December 2020 and the maintenance study for both is ongoing. Use of upadacitinib in ulcerative colitis is not approved and its safety and efficacy have not been evaluated by regulatory authorities.



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