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There is an unmet need for a treatment for psoriasis that results in complete skin clearance with a reliably quick response. Bimekizumab is a monoclonal IgG1 antibody that selectively inhibits interleukin (IL)-17F in addition to IL-17A. We aimed to compare the efficacy and safety of bimekizumab with placebo and ustekinumab in patients with moderate to severe plaque psoriasis over 52 weeks. BE VIVID was a multicentre, randomised, double-blind, active comparator and placebo controlled phase 3 trial done across 105 sites (clinics, hospitals, research units, and private practices) in 11 countries in Asia, Australia, Europe, and North America. Adults aged 18 years or older with moderate to severe plaque psoriasis (Psoriasis Area and Severity Index [PASI] score ≥12, ≥10% body surface area affected by psoriasis, and Investigator's Global Assessment [IGA] score ≥3 on a five point scale) were included. Randomisation was stratified by geographical region and previous exposure to biologics; patients, investigators, and sponsors were masked to treatment assignment. Patients were randomly assigned (4:2:1) using an interactive response technology to bimekizumab 320 mg every 4 weeks, ustekinumab 45 mg or 90 mg (baseline weight-dependent dosing) at weeks 0 and 4, then every 12 weeks, or placebo every 4 weeks. At week 16, patients receiving placebo switched to bimekizumab 320 mg every 4 weeks. All study treatments were administered as two subcutaneous injections. Coprimary endpoints were the proportion of patients with 90% improvement in the PASI (PASI90) and the proportion of patients with an IGA response of clear or almost clear (score 0 or 1) at week 16 (non-responder imputation). Efficacy analyses included the intention-to-treat population; safety analysis included patients who received at least one dose of study treatment. This trial was registered at ClinicalTrials.gov, NCT03370133 (completed). Between Dec 6, 2017, and Dec 13, 2019, 735 patients were screened and 567 were enrolled and randomly assigned (bimekizumab 320 mg every 4 weeks n=321, ustekinumab 45 mg or 90 mg every 12 weeks n=163, placebo n=83). At week 16, 273 (85%) of 321 patients in the bimekizumab group had PASI90 versus 81 (50%) of 163 in the ustekinumab group (risk difference 35 [95% CI 27–43]; p<0·0001) and four (5%) of 83 in the placebo group (risk difference 80 [74–86]; p<0·0001). At week 16, 270 (84%) patients in the bimekizumab group had an IGA response versus 87 (53%) in the ustekinumab group (risk difference 30 [95% CI 22–39]; p<0·0001) and four (5%) in the placebo group (risk difference 79 [73–85]; p<0·0001). Over 52 weeks, serious treatment-emergent adverse events were reported in 24 (6%) of 395 patients in the bimekizumab group (including those who switched from placebo at week 16) and 13 (8%) of 163 in the ustekinumab group. Bimekizumab was more efficacious than ustekinumab and placebo in the treatment of moderate to severe plaque psoriasis. The bimekizumab safety profile was consistent with that observed in previous studies. UCB Pharma.

Tildrakizumab is a high-affinity, humanised, IgG1 κ antibody targeting interleukin 23 p19 that represents an evolving treatment strategy in chronic plaque psoriasis. Previous research suggested clinical improvement with inhibition of interleukin 23 p19. We did two phase 3 trials to investigate whether tildrakizumab is superior to placebo and etanercept in the treatment of chronic plaque psoriasis. We did two three-part, parallel group, double-blind, randomised controlled studies, reSURFACE 1 (at 118 sites in Australia, Canada, Japan, the UK, and the USA) and reSURFACE 2 (at 132 sites in Europe, Israel, and the USA). Participants aged 18 years or older with moderate-to-severe chronic plaque psoriasis (body surface area involvement ≥10%, Physician's Global Assessment [PGA] score ≥3, and Psoriasis Area and Severity Index [PASI] score ≥12) were randomised (via interactive voice and web response system) to tildrakizumab 200 mg, tildrakizumab 100 mg, or placebo in reSURFACE 1 (2:2:1), or to tildrakizumab 200 mg, tildrakizumab 100 mg, placebo, or etanercept 50 mg (2:2:1:2). Randomisation was done by region and stratified for bodyweight (≤90 kg or >90 kg) and previous exposure to biologics therapy for psoriasis. Investigators, participants, and study personnel were blinded to group allocation and remained blinded until completion of the studies. Assigned medication was identical in appearance and packaging. Tildrakizumab was administered subcutaneously at weeks 0 and 4 during part 1 and at week 16 during part 2 (weeks 12 and 16 for participants re-randomised from placebo to tildrakizumab; etanercept was given twice weekly in part 1 of reSURFACE 2 and once weekly during part 2). The co-primary endpoints were the proportion of patients achieving PASI 75 and PGA response (score of 0 or 1 with ≥2 grade score reduction from baseline) at week 12. Safety was assessed in the all-participants-as-treated population, and efficacy in the full-analysis set. These trials are registered with ClinicalTrials.gov, numbers NCT01722331 (reSURFACE 1) and NCT01729754 (reSURFACE 2). These studies are completed, but extension studies are ongoing. reSURFACE 1 ran from Dec 10, 2012, to Oct 28, 2015. reSURFACE 2 ran from Feb 12, 2013, to Sept 28, 2015. In reSURFACE 1, 772 patients were randomly assigned, 308 to tildrakizumab 200 mg, 309 to tildrakizumab 100 mg, and 155 to placebo. At week 12, 192 patients (62%) in the 200 mg group and 197 patients (64%) in the 100 mg group achieved PASI 75, compared with 9 patients (6%) in the placebo group (p<0·0001 for comparisons of both tildrakizumab groups vs placebo). 182 patients (59%) in the 200 mg group and 179 patients (58%) in the 100 mg group achieved PGA responses, compared with 11 patients (7%) in the placebo group (p<0·0001 for comparisons of both tildrakizumab groups vs placebo). In reSURFACE 2, 1090 patients were randomly assigned, 314 to tildrakizumab 200 mg, 307 to tildrakizumab 100 mg, 156 to placebo, and 313 to etanercept. At week 12, 206 patients (66%) in the 200 mg group, and 188 patients (61%) in the 100 mg group achieved PASI 75, compared with 9 patients (6%) in the placebo group and 151 patients (48%) in the etanercept group (p<0·0001 for comparisons of both tildrakizumab groups vs placebo; p<0·0001 for 200 mg vs etanercept and p=0·0010 for 100 mg vs etanercept). 186 patients (59%) in the 200 mg group, and 168 patients (55%) in the 100 mg group achieved a PGA response, compared with 7 patients (4%) in the placebo group and 149 patients (48%) in the etanercept group (p<0·0001 for comparisons of both tildrakizumab groups vs placebo; p=0·0031 for 200 mg vs etanercept and p=0·0663 for 100 mg vs etanercept). Serious adverse events were similar and low in all groups in both trials. One patient died in reSURFACE 2, in the tildrakizumab 100 mg group; the patient had alcoholic cardiomyopathy and steatohepatitis, and adjudication was unable to determine the cause of death. In two phase 3 trials, tildrakizumab 200 mg and 100 mg were efficacious compared with placebo and etanercept and were well tolerated in the treatment of patients with moderate-to-severe chronic plaque psoriasis. Merck & Co.

In two identical trials of treatment for psoriasis with the topical aryl hydrocarbon receptor–modulating agent tapinarof, clearance or near-clearance of lesions occurred in a larger proportion of patients who used tapinarof cream than of those who used placebo. Side effects included folliculitis, contact dermatitis, and headache.

Hidradenitis suppurativa is a painful, chronic inflammatory skin disease. In two double-blind, placebo-controlled trials, treatment with adalimumab resulted in significantly increased rates of clinical response at week 12. Rates of serious adverse events were similar between groups. Hidradenitis suppurativa, also known as acne inversa, is a painful, chronic inflammatory skin disease 1 – 3 characterized by multifocal, recurrent nodules, abscesses, and fistulas, predominantly affecting the axillary, inguinal, breast-fold, and anogenital regions. 4 The prevalence of self-reported disease is 1% in Western Europe. 1 , 5 The average interval from the onset of symptoms to diagnosis is 7.2 years. 6 Women are affected 2 to 5 times as frequently as men, and the disease may be more common in blacks than in whites. 1 , 7 Disease severity ranges from mild (localized lesions) to severe (multiple areas of widely dispersed lesions, including interconnected sinus tracts and . . .

Interleukins 12 and 23 have important roles in the pathophysiology of psoriasis. We assessed ustekinumab, a human monoclonal antibody directed against these cytokines, for the treatment of psoriasis. In this phase III, parallel, double-blind, placebo-controlled study, 766 patients with moderate-to-severe psoriasis were randomly assigned to receive ustekinumab 45 mg (n=255) or 90 mg (n=256) at weeks 0 and 4 and then every 12 weeks; or placebo (n=255) at weeks 0 and 4, with subsequent crossover to ustekinumab at week 12. Patients who were initially randomised to receive ustekinumab at week 0 who achieved long-term response (at least 75% improvement in psoriasis area and severity index [PASI 75] at weeks 28 and 40) were re-randomised at week 40 to maintenance ustekinumab or withdrawal from treatment until loss of response. Both randomisations were done with a minimisation method via a centralised interactive voice response system. The primary endpoint was the proportion of patients achieving PASI 75 at week 12. Analyses were by intention to treat. This study is registered with ClinicalTrials.gov, number NCT00267969. All randomised patients were included in the efficacy analysis. 171 (67·1%) patients receiving ustekinumab 45 mg, 170 (66·4%) receiving ustekinumab 90 mg, and eight (3·1%) receiving placebo achieved PASI 75 at week 12 (difference in response rate vs placebo 63·9%, 95% CI 57·8–70·1, p<0·0001 for 45 mg and 63·3%, 57·1–69·4, p<0·0001 for 90 mg). At week 40, long-term response had been achieved by 150 patients in the 45 mg group and 172 patients in the 90 mg group. Of these, 162 patients were randomly assigned to maintenance ustekinumab and 160 to withdrawal. PASI 75 response was better maintained to at least 1 year in those receiving maintenance ustekinumab than in those withdrawn from treatment at week 40 (p<0·0001 by log-rank test). During the placebo-controlled phase, adverse events occurred in 278 (54·5%) of the 510 patients receiving ustekinumab and 123 (48·2%) of the 255 receiving placebo. Serious adverse events occurred in six (1·2%) of 510 patients receiving ustekinumab and in two (0·8%) of 255 receiving placebo in this phase. The pattern of adverse events was much the same in the placebo crossover and randomised withdrawal phases as it was in the placebo-controlled phase. Ustekinumab seems to be efficacious for the treatment of moderate-to-severe psoriasis; dosing every 12 weeks maintains efficacy for at least a year in most patients. Centocor Inc.

Ustekinumab, a human monoclonal antibody against interleukins 12 and 23, has shown therapeutic potential for psoriasis. This study assessed the efficacy and safety of ustekinumab in psoriasis patients and assessed dosing intensification in partial responders. In this multicentre, phase III, double-blind, placebo-controlled study, 1230 patients with moderate-to-severe psoriasis (defined by a psoriasis area and severity index [PASI] score ≥12, and at least 10% total body surface area involvement) were randomly assigned to receive ustekinumab 45 mg (n=409) or 90 mg (n=411) at weeks 0 and 4, then every 12 weeks, or placebo (n=410). Partial responders (ie, patients achieving ≥50% but <75% improvement from baseline in PASI) were re-randomised at week 28 to continue dosing every 12 weeks or escalate to dosing every 8 weeks. Both randomisations were done with a minimisation method via a centralised interactive voice response. The primary endpoint was the proportion of patients achieving at least 75% improvement in PASI (PASI 75) at week 12. Analyses were by intention to treat. This study is registered with ClinicalTrials.gov, number NCT00307437. All randomised patients were included in the efficacy analysis. 273 (66·7%) patients receiving ustekinumab 45 mg, 311 (75·7%) receiving ustekinumab 90 mg, and 15 (3·7%) receiving placebo achieved the primary endpoint (difference in response rate 63·1%, 95% CI 58·2–68·0, p<0·0001 for the 45 mg group vs placebo and 72·0%, 67·5–76·5, p<0·0001 for the 90 mg group vs placebo). More partial responders at week 28 who received ustekinumab 90 mg every 8 weeks achieved PASI 75 at week 52 than did those who continued to receive the same dose every 12 weeks (22 [68·8%] vs 11 [33·3%]; difference in response rate 35·4%, 95% CI 12·7–58·1, p=0·004). There was no such response to changes in dosing intensity in partial responders treated with ustekinumab 45 mg. During the placebo-controlled phase, 217 (53·1%) patients in the 45 mg group, 197 (47·9%) in the 90 mg group, and 204 (49·8%) in the placebo group experienced adverse events; serious adverse events were seen in eight (2·0%) patients in the 45 mg group, five (1·2%) in the 90 mg group, and eight (2·0%) in the placebo group. Although treatment with ustekinumab every 12 weeks is effective for most patients with moderate-to-severe psoriasis, intensification of dosing to once every 8 weeks with ustekinumab 90 mg might be necessary to elicit a full response in patients who only partially respond to the initial regimen. Centocor Inc.

Efficacious and well-tolerated systemic, oral treatments for psoriasis are needed. We report preclinical and phase 1c (NCT06808815) results for DC-806, a small molecule interleukin (IL)-17 inhibitor, for the treatment of mild-to-moderate psoriasis. Preclinical results demonstrated DC-806 targets IL-17AA and IL-17AF with secukinumab-like therapeutic efficacy. In the phase 1c trial, 32 patients consented to receive twice daily (BID) doses of placebo or DC-806 (200 mg or 800 mg) for 28 days. No serious adverse events (SAEs) or discontinuations due to treatment-related adverse events (TRAEs) occurred. In an exploratory analysis, adjusted mean percentage reductions from baseline in psoriasis area and severity indices (PASI) at Day 29 were 43.7%, 15.1%, and 13.3% for 800 mg BID, 200 mg BID, and placebo arms, respectively (800 mg BID vs placebo, P value = 0.0008). DC-806 was found to be well tolerated with an acceptable safety profile and preliminary signals of clinical efficacy in mild-to-moderate psoriasis. EudraCT Identifier: 2021-002888-21.

Background We report long-term, end-of-study program safety outcomes from 25 randomized clinical trials (RCTs) in adult patients with psoriasis (PsO), psoriatic arthritis (PsA), or axial spondyloarthritis (axSpA) [including ankylosing spondylitis (AS) and non-radiographic axial spondyloarthritis (nr-axSpA)] who received ≥ 1 dose of Ixekizumab (IXE) over 5 years (PsO) or up to 3 years (PsA, axSpA). Methods This integrated safety analysis consists of data from patients who received any dose of IXE, across 25 RCTs (17 PsO, 4 PsA, 4 axSpA). Rates of treatment-emergent adverse events (TEAEs), serious adverse events (SAEs) and selected adverse events (AEs) of interest were analyzed for all pooled studies by years of therapy and overall, through March 2022. Results were reported as exposure-adjusted incidence rates (IRs) per 100 patient-years (PY) overall and at successive year intervals. Results Six thousand eight hundred ninety two adult patients with PsO, 1401 with PsA, and 932 with axSpA (including AS and nr-axSpA), with a cumulative IXE exposure of 22,371.1 PY were included. The most commonly reported TEAE across indications was nasopharyngitis (IRs per 100 PY: 8.8 (PsO), 9.0 (PsA), 8.4 (axSpA)). SAEs were reported by 969 patients with PsO (IR 5.4), 134 patients with PsA (IR 6.0), and 101 patients with axSpA (IR 4.8). Forty-five deaths were reported (PsO, n  = 36, IR 0.2; PsA, n  = 6, IR 0.3; axSpA, n  = 3, IR 0.1). TEAEs did not increase during IXE exposure: IRs per 100 PY, PsO: 88.9 to 63.2 (year 0–1 to 4–5), PsA: 87 to 67.3 (year 0–1 to 2–3), axSpA: 82.1 to 55.4 (year 0–1 to >  = 2). IRs per 100 PY of discontinuation from IXE due to AE were 2.9 (PsO), 5.1 (PsA), and 3.1 (axSpA). IRs per 100 PY of injection site reactions were 5.9 (PsO), 11.6 (PsA) and 7.4 (axSpA); Candida : 1.9 (PsO), 2.0 (PsA), and 1.2 (axSpA); depression, major adverse cerebro-cardiovascular events and malignancies: ≤ 1.6 across all indications. Adjudicated IRs per 100 PY of inflammatory bowel disease were ≤ 0.8 across indications (0.1 [PsO]; 0.1 [PsA]; 0.8 [axSpA]). Conclusions In this integrated safety analysis, consisting of over 22,000 PY of exposure, the long-term safety profile of IXE was found to be consistent with previous, earlier reports, with no new safety signals identified. Trial registration NCT registration numbers for RCTs included in this integrated analysis can be found in Additional File 1 .

A previous phase II trial demonstrated that the fully human anti-IL-12/23 mAb briakinumab was efficacious in moderate-to-severe psoriasis. A subsequent 52-week, double-blind, placebo-controlled phase III study evaluated induction and maintenance treatment. Patients were randomized 2:1 to briakinumab (200mg at weeks 0 and 4 and 100mg at week 8) or placebo; those with physician's global assessment “clear” or “minimal” (PGA “clear/minimal”) at week 12 were then re-randomized 2:2:1 to briakinumab 100 mg every 4 weeks (q4-wk), every 12 weeks (q12-wk), or to matching placebo to week 52. Primary analyses conducted by nonresponder imputation compared proportions achieving PGA “clear/minimal” (weeks 12 and 52) and ≥75% improvement in psoriasis area and severity index (PASI 75; week 12). In all, 76.0% of briakinumab vs. 4.3% of placebo-treated patients achieved PGA “clear/minimal,” and 80.7% vs. 4.5%, respectively, achieved PASI 75 at week 12 (P<0.001 each). At week 52, 79.2% of q4-wk-treated patients achieved PGA “clear/minimal” compared with 41.6% and 6.0% of q12-wk and placebo-treated patients, respectively (P<0.001 for all treatment comparisons). Higher numbers of the following adverse events (AEs) of interest were observed with briakinumab during the placebo-controlled period, suggesting the need for surveillance for these events: serious infections (five vs. one event with briakinumab vs. placebo, respectively), nonmelanoma skin cancers (NMSCs; four vs. zero squamous cell carcinomas (SCCs)), and major adverse cardiovascular events (MACEs; five vs. zero events).

Sonelokimab (also known as M1095) is a novel trivalent nanobody comprised of monovalent camelid-derived (ie, from the Camelidae family of mammals, such as camels, llamas, and alpacas) nanobodies specific to human interleukin (IL)-17A, IL-17F, and human serum albumin. Nanobodies are a novel class of proprietary therapeutic proteins based on single-domain, camelid, heavy-chain-only antibodies. We assessed the efficacy, safety, and tolerability of sonelokimab across four dosage regimens compared with placebo in patients with plaque-type psoriasis. Secukinumab served as an active control. This multicentre, randomised, placebo-controlled, phase 2b trial was done at 41 clinics and research sites in Bulgaria, Canada, Czech Republic, Germany, Hungary, Poland, and the USA. Participants (aged 18–75 years) with stable moderate to severe plaque-type psoriasis (defined as an Investigator's Global Assessment [IGA] score of ≥3, a body surface area involvement of ≥10%, and a Psoriasis Area and Severity Index score of ≥12) for more than 6 months before randomisation, who were candidates for systemic biological therapy were included. Participants previously treated with more than two biologics or any therapy targeting IL-17 were excluded. Randomisation was stratified by weight (≤90 kg or >90 kg) and previous use of biologics. Investigators, participants, and vendors remained masked for the duration of the study, with the exception of each site's study drug administrator (who did not complete any other assessments in the study) and a study monitor who only assessed drug preparation, administration, and accountability. The study sponsor remained masked until all week 24 data were clean and locked. Participants were randomly assigned (1:1:1:1:1:1) using a centralised interactive response technology system to one of six parallel treatment groups: placebo group, sonelokimab 30 mg group, sonelokimab 60 mg group, sonelokimab 120 mg normal load group, sonelokimab 120 mg augmented load group, or secukinumab 300 mg group. All participants underwent a 4-week screening period, a 12-week placebo-controlled induction period, a 12-week dose maintenance or escalation period, and a 24-week response assessment or dose-holding period. During the placebo-controlled induction period (weeks 0–12), participants received either placebo (at weeks 0, 1, 2, 3, 4, 6, 8, and 10), sonelokimab 30 mg, 60 mg, or 120 mg normal load (at weeks 0, 2, 4, and 8), sonelokimab 120 mg augmented load (at weeks 0, 2, 4, 6, 8, and 10), or secukinumab 300 mg (at weeks 0, 1, 2, 3, 4, and 8), with placebo given at weeks 1, 3, 6, and 10 in the sonelokimab 30 mg, 60 mg, and 120 mg normal load groups, at weeks 1 and 3 in the sonelokimab 120 mg augmented load group, and at weeks 6 and 10 in the secukinumab 300 mg group. During the dose maintenance or escalation period (weeks 12–24), participants assigned to the placebo group received sonelokimab 120 mg (at weeks 12, 14, 16, and then every 4 weeks); those assigned to sonelokimab 30 mg or 60 mg groups with an IGA score of more than 1 were escalated to 120 mg and then every 4 weeks, and those with an IGA score of 1 or less stayed on the assigned dose at week 12 and then every 4 weeks; those assigned to the sonelokimab 120 mg groups received sonelokimab 120 mg at week 12 and then every 8 weeks (normal load group) or every 4 weeks (augmented load); and those assigned to the secukinumab 300 mg group received secukinumab 300 mg at week 12 and then every 4 weeks. During this period, placebo was given at week 14 in all groups, except in participants who initially received placebo, and at week 16 in the sonelokimab 120 mg normal load group. In the response assessment with dose-holding period (weeks 24–48), participants in the sonelokimab 30 mg or 60 mg groups who had dose escalation to 120 mg remained on the same regimen regardless of the IGA score at week 24. Participants in the secukinumab 300 mg group also remained on the same regimen regardless of IGA score at week 24. Participants in the sonelokimab 30 mg and 60 mg groups without dose escalation, and all participants in the two sonelokimab 120 mg groups (including placebo rollover patients) were eligible to stop the study drug at week 24. Those participants with an IGA score of 0 at week 24 received placebo; these participants resumed the previous dose of sonelokimab every 4 weeks when they had an IGA score of 1 or more (assessed every 4 weeks). Participants in these groups with an IGA score of 1 or more at week 24 continued on the same dosage. All study treatments were administered as subcutaneous injections. The final dose in all groups was given at week 44. The primary outcome was the proportion of participants in the sonelokimab groups with an IGA of clear or almost clear (score 0 or 1) at week 12 compared with the placebo group. The primary outcome and safety outcomes were assessed on an intention-to-treat basis. The study was not powered for formal comparisons between sonelokimab and secukinumab groups. This trial is registered with ClinicalTrials.gov, NCT03384745. Between Aug 15, 2018, and March 27, 2019, 383 patients were assessed for eligibility, 313 of whom were enrolled and randomly assigned to the placebo group (n=52), the sonelokimab 30 mg group (n=52), the sonelokimab 60 mg group (n=52), the sonelokimab 120 mg normal load group (n=53), the sonelokimab 120 mg augmented load group (n=51), or the secukinumab 300 mg group (n=53). Baseline characteristics of participants were similar among the groups. At week 12, none (0·0% [95% CI 0·0–6·8]) of the 52 participants in the placebo group had an IGA score of 0 or 1 versus 25 (48·1% [34·0–62·4], p<0·0001) of 52 participants in the sonelokimab 30 mg group, 44 (84·6% [71·9–93·1], p<0·0001) of 52 participants in the sonelokimab 60 mg group, 41 (77·4% [63·8–87·7], p<0·0001) of 53 participants in the sonelokimab 120 mg normal load group, 45 (88·2% [76·1–95·6], p<0·0001) of 51 participants in the sonelokimab 120 mg augmented load group, and 41 (77·4% [63·8–87·7], p<0·0001) of 53 participants in the secukinumab 300 mg group. During the placebo-controlled induction period, 155 (49·5%) of 313 participants had one or more mostly mild to moderate adverse event; the most frequent adverse events in all participants on sonelokimab during weeks 0–12 were nasopharyngitis (28 [13·5%] of 208 participants), pruritus (14 [6·7%] participants), and upper respiratory tract infection (nine [4·3%] participants). One patient from all sonelokimab-containing groups had Crohn's disease that developed during weeks 12–52. Over 52 weeks, sonelokimab safety was similar to secukinumab, with the possible exception of manageable Candida infections (one [1·9%] of 53 participants in the secukinumab group had a Candida infection vs 19 [7·4%] of 257 participants in all sonelokimab-containing groups). Treatment with sonelokimab doses of 120 mg or less showed significant clinical benefit over placebo, with rapid onset of treatment effect, durable improvements, and an acceptable safety profile. Avillion.