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Objective: Neurokinin (NK)-3 and NK-1 receptors have been implicated in the etiology of vasomotor symptoms (VMS) and sleep disturbances associated with menopause. This phase 2b, adaptive, dose-range finding study aimed to assess the efficacy and safety of multiple doses of elinzanetant (NT-814), a selective NK-1,3 receptor antagonist, in women experiencing VMS associated with menopause, and investigate the impact of elinzanetant on sleep and quality of life., Methods: Postmenopausal women aged 40 to 65 years who experienced seven or more moderate-to-severe VMS per day were randomized to receive elinzanetant 40, 80, 120, or 160 mg or placebo once daily using an adaptive design algorithm. Coprimary endpoints were reduction in mean frequency and severity of moderate-to-severe VMS at weeks 4 and 12. Secondary endpoints included patient-reported assessments of sleep and quality of life., Results: Elinzanetant 120 mg and 160 mg achieved reductions in VMS frequency versus placebo from week 1 throughout 12 weeks of treatment. Least square mean reductions were statistically significant versus placebo at both primary endpoint time points for elinzanetant 120 mg (week 4: -3.93 [SE, 1.02], P < 0.001; week 12: -2.95 [1.15], P = 0.01) and at week 4 for elinzanetant 160 mg (-2.63 [1.03]; P = 0.01). Both doses also led to clinically meaningful improvements in measures of sleep and quality of life. All doses of elinzanetant were well tolerated., Conclusions: Elinzanetant is an effective and well-tolerated nonhormone treatment option for postmenopausal women with VMS and associated sleep disturbance. Elinzanetant also improves quality of life in women with VMS., Competing Interests: Financial disclosure/conflicts of interest: C.C. and L.Z. are employees of Bayer CC AG. C.S. is an employee of Bayer AG. M.K., S.P., E.B., S.S., and M.T. are employees of NeRRe Therapeutics. J.B., as an employee of Cytel Inc, was a paid statistical consultant on this trial. R.A.A. has undertaken consultancy work for NeRRe Therapeutics and Sojournix Inc. J.A.S. has grant/research support from AbbVie, Inc, Bayer Healthcare LLC, Daré Bioscience, Ipsen, Mylan/Viatris Inc, Myovant Sciences, ObsEva SA, Sebela Pharmaceuticals Inc, and Viveve Medical; has been a consultant/advisory boards of Bayer HealthCare Pharmaceuticals Inc, Besins Healthcare, California Institute of Integral Studies, Camargo Pharmaceutical Services, LLC, Covance Inc, Daré Bioscience, DEKA M.E.L.A. S.r.l., Femasys Inc, KaNDy/NeRRe Therapeutics Ltd, Khyria, Madorra Pty Ltd, Mitsubishi Tanabe Pharma Development America, Inc, QUE Oncology Pty, Limited, Scynexis Inc, Sebela Pharmaceuticals, Inc, Sprout Pharmaceuticals, Inc, and Vella Bioscience Inc; has served on the Speaker's bureaus of Mayne Pharma, Inc, Myovant Sciences, Inc, Pfizer Inc, Pharmavite LLC, Scynexis Inc, and TherapeuticsMD; and is a stockholder (direct purchase) in Sermonix Pharmaceuticals. N.P. has undertaken consultancy and speaker's bureau work for a number of pharmaceutical companies including Bayer AG. H.J. has received grant funding from National Institutes of Health, Merck, Pfizer, and Hello Therapeutics; has undertaken consultancy work for Bayer, Jazz, and Eisai; and her spouse is an employee at Arsenal Biosciences and has equity at Merck., (Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of The North American Menopause Society.)

Context: The ideal therapy for endometriosis (EM) and uterine fibroids (UFs) would suppress estrogenic drive to the endometrium and myometrium, while minimizing vasomotor symptoms and bone loss associated with current treatments. An integrated neurokinin-kisspeptin system involving substance P and neurokinin B acting at the neurokinin (NK) receptors 1 and 3, respectively, modulates reproductive hormone secretion and represents a therapeutic target., Objective: This work aimed to assess the effects of the novel NK1,3 antagonist elinzanetant on reproductive hormone levels in healthy women., Methods: A randomized, single-blinded, placebo-controlled study was conducted in 33 women who attended for 2 consecutive menstrual cycles. In each cycle blood samples were taken on days 3 or 4, 9 or 10, 15 or 16, and 21 or 22 to measure serum reproductive hormones. In cycle 2, women were randomly assigned to receive once-daily oral elinzanetant 40, 80, 120 mg, or placebo (N = 8 or 9 per group)., Results: Elinzanetant dose-dependently lowered serum luteinizing hormone, estradiol (120 mg median change across cycle: -141.4 pmol/L, P = .038), and luteal-phase progesterone (120 mg change from baseline on day 21 or 22: -19.400 nmol/L, P = .046). Elinzanetant 120 mg prolonged the cycle length by median of 7.0 days (P = .023). Elinzanetant reduced the proportion of women with a luteal-phase serum progesterone concentration greater than 30 nmol/L (a concentration consistent with ovulation) in a dose-related manner in cycle 2 (P = .002). Treatment did not produce vasomotor symptoms., Conclusion: NK1,3 receptor antagonism with elinzanetant dose-dependently suppressed the reproductive axis in healthy women, with the 120-mg dose lowering estradiol to potentially ideal levels for UFs and EM. As such, elinzanetant may represent a novel therapy to manipulate reproductive hormone levels in women with hormone-driven disorders., (© The Author(s) 2021. Published by Oxford University Press on behalf of the Endocrine Society.)

Objectives: To evaluate the safety, pharmacokinetics, and preliminary efficacy of NT-814, a dual neurokinin 1,3 antagonist, in postmenopausal women with vasomotor symptoms (hot flashes)., Methods: We completed a double-blind, randomized, placebo-controlled trial in three US clinical research units in 76 postmenopausal women with moderate/severe hot flashes. Participants were randomized to 14 days of once-daily NT-814 or placebo within each of four sequential dose cohorts; 50, 100, 150, and 300 mg. Participants completed diaries of hot flash frequency and severity and waking due to night sweats before (baseline) and during treatment., Results: All prespecified efficacy parameters (24-h hot flash frequency and severity, frequency of waking due to night sweats) decreased in all groups (including placebo). Mean reduction from baseline at week 2 in moderate/severe hot flash frequency was 37% in the placebo group and, respectively, 24% (P = 0.048 vs placebo), 59% (P = 0.155), 84% (P < 0.001) and 66% (P = 0.022) in the 50 mg, 100 mg, 150 mg, and 300 mg NT-814 groups; in waking due to night sweats reduction was 20% (P = 0.059), 55% (P = 0.135), 81% (P < 0.001), and 63% (P = 0.031) in the NT-814 groups and 32% in the placebo group. The improvement with NT-814 ≥150 mg was also evident in the first week of treatment. The most common treatment-related adverse events were mild somnolence and headache, more frequently in the 300 mg group. Safety monitoring identified no concerns., Conclusions: Once-daily NT-814 (≥150 mg/d) resulted in a rapid, marked improvement in hot flashes and waking due to night sweats. No safety concerns were identified. Doses up to 300 mg were well tolerated.

Objective: To evaluate the efficacy of orvepitant (10 or 30 mg given once daily, orally for 4 weeks), a neurokinin-1 receptor antagonist, compared with placebo in reducing the intensity of epidermal growth factor receptor inhibitor (EGFRI)-induced intense pruritus., Design: Randomised, double-blind, placebo-controlled clinical trial., Setting: 15 hospitals in Italy and five hospitals in the UK., Participants: 44 patients aged ≥18 years receiving an EGFRI for a histologically confirmed malignant solid tumour and experiencing moderate or intense pruritus after EGFRI treatment., Intervention: 30 or 10 mg orvepitant or placebo tablets once daily for 4 weeks (randomised 1:1:1)., Primary and Secondary Outcome Measures: The primary endpoint was change from baseline in mean patient-recorded numerical rating scale (NRS) score (over the last three recordings) at week 4. Secondary outcome measures were NRS score, verbal rating scale score, Skindex-16 and Leeds Sleep Evaluation Questionnaire at each study visit (baseline, weeks 1, 4, 8); rescue medication use; EGFRI dose reduction; and study withdrawal because of intense uncontrolled pruritus., Results: The trial was terminated early because of recruitment challenges; only 44 of the planned 90 patients were randomised. All patients were analysed for efficacy and safety. Mean NRS score change from baseline to week 4 was -2.78 (SD: 2.64) points in the 30 mg group, -3.04 (SD: 3.06) points in the 10 mg group and -3.21 (SD: 1.77) points in the placebo group; the difference between orvepitant and placebo was not statistically significant. No safety signal was detected. Adverse events related to orvepitant (asthenia, dizziness, dry mouth, hyperhidrosis) were all of mild or moderate severity., Conclusions: Orvepitant was safe and well tolerated. No difference in NRS score between the orvepitant and placebo groups was observed at the week 4 primary endpoint. A number of explanations for this outcome are possible., Trial Registration Number: EudraCT2013-002763-25., Competing Interests: Competing interests: MT is a current employee and ER is a past employee of NeRRe Therapeutics, and both are inventors on a granted patent on novel uses of orvepitant. BV and PG received payment from NeRRe as investigators in this study. AD received payment from NeRRe for service as the chief medical officer for this study. DJ is an employee of Cromsource, who received payment from NeRRe for statistical analysis of this study. PH has received payment from NeRRe as a consultant. MEL reports receiving personal fees from Legacy Healthcare Services, AdgeroBio Pharmaceuticals, Amryt Pharma, Celldex Therapeutics, Debiopharm, Galderma Research and Development, Johnson & Johnson, Novocure, Lindi Skin, Merck Sharp and Dohme, Helsinn Healthcare, Janssen Research & Development, Menlo Therapeutics, Novartis Pharmaceuticals, F Hoffmann-La Roche, AbbVie, Boehringer Ingelheim Pharma, Allergan, Amgen, ER Squibb & Sons, EMD Serono, AstraZeneca Pharmaceuticals, Genentech, Leo Pharma, Seattle Genetics, Bayer, Männer SAS, Lutris Pharma, Pierre Fabre, Paxman Cooler, Adjucare, Dignitana, Biotechspert, Teva Pharmaceuticals Mexico, Parexel, OnQuality Pharmaceuticals, Novartis, Our Brain Bank, Millennium Pharmaceuticals, and research funding from Berg Health, Bristol-Myers Squibb, Lutris Pharma, Novocure, Paxman, Biotest and Veloce BioPharma. GT reports no conflicts of interest. AW reports receiving payment from NeRRe as chair of the advisory board and from Advent Life Sciences for consultancy, Canbex Therapeutics as a non-executive director (past position), Calcico Therapeutics as chairman (past position) and a non-executive director (past position), and the Wellcome Trust as a member of grant committees. SS reports receiving payment from NeRRe as a member of the advisory board and from Almirall, Astellas Pharma, Beiersdorf, Celgene, Chugai Pharma, Creabilis, Daiichi Sankyo, Galderma, Helsinn, Kiniska Pharmaceuticals, Kneipp, Maruho, Merz Pharma, Novartis, Pierre Fabre Laboratories, Sienna Biopharmaceuticals and Ziarco as a member of their advisory boards and from Menlo Therapeutics as an investigator and participation as an investigator in trials sponsored by Dermascence, Trevi Therapeutics and Vanda Pharmaceuticals., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Background: Substance P and the neurokinin-1 (NK-1) receptor are implicated in chronic refractory cough pathophysiology. We assessed the efficacy and safety of orvepitant, a brain-penetrant NK-1 antagonist, in an open-label study in CRC patients with chronic refractory cough., Methods: Thirteen patients with daytime cough frequency >3 to <250 coughs/h took orvepitant 30 mg once daily for 4 weeks. Objective cough frequency was measured over 24 h at baseline and weeks 1, 4, and 8. The primary end point was change from Baseline in daytime cough frequency at week 4. Secondary end points included cough severity visual analog scale (VAS) score, global ratings of change for cough frequency and severity, and Cough-specific Quality of Life Questionnaire score., Results: All patients completed the study. Mean baseline cough frequency was 71.4/h. A statistically and clinically significant improvement in objective daytime cough frequency was observed at week 4: reduction from baseline of 18.9 (26%) coughs/h (95% CI, 9.6-28.3; P < .001). This effect was apparent at week 1 (reduction from baseline of 27.0 [38%] coughs/h [95% CI, 11.4-42.7; P = .001]) and sustained after drug discontinuation at week 8 (reduction from baseline of 20.4 [29%] coughs/h [95% CI, 3.2-37.5; P = .020]). Statistically significant improvements were seen for severity VAS and quality of life. Orvepitant was safe and well-tolerated., Conclusions: Orvepitant resulted in a significant and sustained improvement in objective cough frequency, severity VAS, and quality of life; appeared safe; and merits further clinical investigation., Trial Registry: EU Clinical Trials Register; No.: 2014-003947-36; URL: www.clinicaltrialsregister.eu., (Copyright © 2019. Published by Elsevier Inc.)