PMID- 38330377 OWN - NLM STAT- Publisher LR - 20240208 IS - 2005-0399 (Electronic) IS - 2005-0380 (Linking) DP - 2024 Jan 24 TI - A phase 1/2a, dose-escalation, safety, and preliminary efficacy study of the RKP00156 vaginal tablet in healthy women and patients with cervical intraepithelial neoplasia 2. LID - 10.3802/jgo.2024.35.e52 [doi] AB - OBJECTIVE: This study aimed to determine the safety and efficacy of the RKP00156 vaginal tablet, a CDK9 inhibitor, in healthy women and patients with cervical intraepithelial neoplasia grade 2 (CIN2). METHODS: We conducted a phase 1/2a clinical trial of RKP00156. In step 1, RKP00156 at a dose of 10, 25, or 50 mg or a placebo tablet was administered transvaginally to 24 healthy women. In step 2, RKP00156 at a dose of 10, 25, or 50 mg or a placebo tablet was administered once daily for 4 weeks in 62 patients with CIN2. The primary endpoints of this trial were the safety of RKP00156 and the change in the human papillomavirus (HPV) viral load. RESULTS: A total of 86 patients were enrolled and randomized. RKP00156 administration did not cause serious drug-associated adverse events (AEs). Although no significant difference in the HPV viral load was found between the experimental and placebo groups, a reduction in the HPV viral load was observed in the 25 mg-dose group (-98.61%; 95% confidence interval=-99.83%, 4.52%; p=0.046) after treatment completion in patients with a high HPV viral load, despite a lack of statistical power. No differences in histologic regression and HPV clearance were observed. CONCLUSION: The safety of RKP00156 was proved with no serious AEs. Although the study did not show any significance in histologic regression and HPV clearance, our findings indicate that RKP00156 may have a possibility of short-term inhibitory effect on HPV replication in patients with higher viral loads. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02139267. CI - (c) 2024. Asian Society of Gynecologic Oncology, Korean Society of Gynecologic Oncology, and Japan Society of Gynecologic Oncology. FAU - Cho, Hyun-Woong AU - Cho HW AUID- ORCID: 0000-0002-7114-6301 AD - Department of Obstetrics and Gynecology, Korea University Guro Hospital, Seoul, Korea. FAU - Jeong, Sohyeon AU - Jeong S AUID- ORCID: 0000-0003-1354-0711 AD - Department of Obstetrics and Gynecology, Korea University Guro Hospital, Seoul, Korea. FAU - Song, Seung Hun AU - Song SH AUID- ORCID: 0000-0002-9192-8984 AD - Comprehensive Gynecologic Cancer Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea. FAU - Kim, Young Tae AU - Kim YT AUID- ORCID: 0000-0002-7347-1052 AD - Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea. FAU - Kim, Jae-Weon AU - Kim JW AUID- ORCID: 0000-0003-1835-9436 AD - Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea. FAU - Cho, Chi-Heum AU - Cho CH AUID- ORCID: 0000-0002-0437-4099 AD - Department of Obstetrics and Gynecology, Keimyung University School of Medicine, Daegu, Korea. FAU - Hur, Soo Young AU - Hur SY AUID- ORCID: 0000-0001-6563-2293 AD - Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea. FAU - Chang, Suk-Joon AU - Chang SJ AUID- ORCID: 0000-0002-0558-0038 AD - Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea. FAU - Kim, Yong Man AU - Kim YM AUID- ORCID: 0000-0003-3391-4426 AD - Department of Obstetrics and Gynecology, Asan Medical Center, University of Ulsan, Seoul, Korea. FAU - Lee, Jae Kwan AU - Lee JK AUID- ORCID: 0000-0002-9727-3587 AD - Department of Obstetrics and Gynecology, Korea University Guro Hospital, Seoul, Korea. jklee38@korea.ac.kr. LA - eng SI - ClinicalTrials.gov/NCT02139267 GR - KinoPharma/Japan PT - Journal Article DEP - 20240124 PL - Korea (South) TA - J Gynecol Oncol JT - Journal of gynecologic oncology JID - 101483150 SB - IM OTO - NOTNLM OT - Human Papillomavirus Viruses OT - Uterine Cervical Dysplasia OT - Viral Load OT - Viral Replication Compartments COIS- No potential conflict of interest relevant to this article was reported. EDAT- 2024/02/08 18:42 MHDA- 2024/02/08 18:42 CRDT- 2024/02/08 16:43 PHST- 2023/07/31 00:00 [received] PHST- 2023/12/15 00:00 [revised] PHST- 2023/12/31 00:00 [accepted] PHST- 2024/02/08 18:42 [medline] PHST- 2024/02/08 18:42 [pubmed] PHST- 2024/02/08 16:43 [entrez] AID - 35.e52 [pii] AID - 10.3802/jgo.2024.35.e52 [doi] PST - aheadofprint SO - J Gynecol Oncol. 2024 Jan 24. doi: 10.3802/jgo.2024.35.e52.