Actively Recruiting

Phase 2
Age: 18Years +
All Genders
ID06172478

HERTHENA-PanTumor01: A Phase 2, Multicenter, Open-Label Study of Patritumab Deruxtecan (HER3-DXd) in Adults With Locally Advanced or Metastatic Solid Tumors

Led by Daiichi Sankyo · Updated on 2026-05-15

740

Participants Needed

85

Research Sites

57 weeks

Total Duration

On this page

Sponsors

D

Daiichi Sankyo

Lead Sponsor

M

Merck Sharp & Dohme LLC

Collaborating Sponsor

AI-Summary

What this Trial Is About

Researchers are evaluating the safety and effectiveness of HER3-DXd monotherapy in adults with locally advanced unresectable or metastatic solid tumors who have previously received at least one line of systemic anticancer therapy. This proof-of-concept Phase 2 study includes multiple cancer types such as melanoma, head and neck cancer, gastric cancer, ovarian carcinoma, cervical cancer, endometrial cancer, bladder cancer, esophageal carcinoma, pancreatic carcinoma, prostate cancer, lung cancer, and breast cancer. The study also examines the relationship between HER3 protein expression in tumors and the treatment's efficacy. Participants will receive HER3-DXd, an intravenous infusion given at a dose of 5.6 mg/kg every three weeks (Q3W). This monotherapy treatment continues through repeated 21-day cycles. The study is open-label and multicohort, allowing enrollment of different tumor types in separate groups. HER3-DXd pharmacokinetics and safety will also be monitored throughout the study. During the trial, participants will undergo regular evaluations including imaging scans to measure tumor response, laboratory tests, and safety assessments. Researchers will assess objective response rates, progression-free survival, overall survival, and other clinical outcomes over approximately 27 months. Pharmacokinetic data will be collected at multiple timepoints during treatment cycles. The study will also track treatment-emergent adverse events and monitor participants until disease progression, withdrawal, or death.

CONDITIONS

Brief Title

A Study of HER3-DXd in Subjects With Locally Advanced or Metastatic Solid Tumors

Who Can Participate

Age: 18Years +
All Genders

Eligibility Criteria

Eligible

You may qualify if you...

  • Signed informed consent prior to any study procedures
  • Aged 18 years or older (or following local legal age requirements)
  • Diagnosed with locally advanced unresectable or metastatic solid tumors including melanoma, head and neck cancer, gastric cancer, ovarian carcinoma, cervical cancer, endometrial cancer, bladder cancer, esophageal carcinoma, pancreatic carcinoma, prostate cancer, second-line gastric cancer, lung cancer, or breast cancer
  • Disease progression after at least one prior line of systemic anticancer therapy appropriate to the tumor type
  • Presence of at least one measurable lesion on CT or MRI (except prostate cancer with bone-only disease)
  • Provide a pretreatment tumor tissue sample meeting study requirements
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 at screening
Not Eligible

You will not qualify if you...

  • HER2-positive gastric cancer as classified by ASCO-CAP guidelines
  • Nasopharyngeal cancer
  • Mucosal or uveal melanoma
  • History of non-infectious interstitial lung disease requiring corticosteroids, current or suspected interstitial lung disease or pneumonitis
  • Clinically severe respiratory compromise from pulmonary illnesses
  • Chronic systemic corticosteroids over 10 mg prednisone daily or equivalent, or immunosuppressive therapy before treatment start
  • Prior treatment with anti-HER3 antibody or antibody-drug conjugate containing a topoisomerase I inhibitor
  • History of other active malignancy within 3 years except adequately treated nonmelanoma skin cancer, intraepithelial carcinoma of the cervix, or curatively treated in situ disease
  • Severe or uncontrolled diseases, psychiatric illness, substance abuse, or other factors that may risk participation or compliance
  • Prior topoisomerase-1 inhibitor treatment in advanced or metastatic setting

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Treatment

Duration - Up to approximately 27 months or until disease progression, death, withdrawal, or lost to follow-up

Participants receive HER3-DXd monotherapy by intravenous infusion every 3 weeks.

Infusions every 3 weeks with visits at each cycle

Trial Site Locations

Total: 85 locations

1

City of Hope

Duarte, California, United States, 91010

Actively Recruiting

2

Yale Cancer Center

New Haven, Connecticut, United States, 06510

Actively Recruiting

3

AdventHealth Medical Group Oncology Research at Celebration

Kissimmee, Florida, United States, 34747

Actively Recruiting

4

University of Illinois Cancer Center

Chicago, Illinois, United States, 60612

Actively Recruiting

5

Johns Hopkins University

Baltimore, Maryland, United States, 21205

Actively Recruiting

6

Health Partners Frauenshuh Cancer Center

Saint Louis Park, Minnesota, United States, 55426

Actively Recruiting

7

Health Partners Cancer Center at Regions Hospital

Saint Paul, Minnesota, United States, 55101

Actively Recruiting

8

Washington University, School of Medicine

St Louis, Missouri, United States, 63110

Actively Recruiting

9

Roswell Park Cancer Institute IDS

Buffalo, New York, United States, 14203

Actively Recruiting

10

Memorial Sloan Kettering Hospital

New York, New York, United States, 10065

Actively Recruiting

11

SCRI Oncology Partners

Nashville, Tennessee, United States, 37203

Actively Recruiting

12

The University of Texas MD Anderson Cancer Center

Houston, Texas, United States, 77030

Actively Recruiting

13

Fred Hutchinson Cancer Center

Seattle, Washington, United States, 98109

Actively Recruiting

14

Chris O'Brien Lifehouse

Camperdown, Australia, 2050

Actively Recruiting

15

Icon Cancer Centre Chermside

Chermside, Australia, 4032

Actively Recruiting

16

Monash Medical Centre Clayton

Clayton, Australia, 3168

Actively Recruiting

17

Icon Cancer Centre Hobart

Hobart, Australia, 7000

Actively Recruiting

18

Icon Cancer Centre Townsville

Hyde Park, Australia, 4812

Actively Recruiting

19

Cliniques Universitaires Saint-Luc

Brussels, Belgium

Actively Recruiting

20

UZA

Edegem, Belgium, 2650

Actively Recruiting

21

Universitair Ziekenhuis Gent

Ghent, Belgium, 9000

Actively Recruiting

22

Universitair Ziekenhuis Brussel

Jette, Belgium

Actively Recruiting

23

UZ Leuven

Leuven, Belgium, 3000

Actively Recruiting

24

Cross Cancer Institute

Edmonton, Alberta, Canada, T6G 1Z2

Actively Recruiting

25

Sunnybrook Research Institute

Toronto, Canada, M4N 3M5

Actively Recruiting

26

Princess Margaret Cancer Centre

Toronto, Canada, M5G2M9

Actively Recruiting

27

BC Cancer - Vancouver

Vancouver, Canada, V5Z4E6

Actively Recruiting

28

West China Hospital, Sichuan University

Chengdu, China, 610098

Actively Recruiting

29

Sun Yat-sen University Cancer Center

Guangzhou, China, 510060

Actively Recruiting

30

Chu Bordeaux

Bordeaux, France, 33000

Actively Recruiting

31

Centre Georges Franăois Leclerc

Dijon, France, 21079

Actively Recruiting

32

Hopital Claude Huriez - Chu Lille

Lille, France, 59000

Actively Recruiting

33

Centre Léon Bérard

Lyon, France, 69008

Actively Recruiting

34

Hăpital de La Timone

Marseille, France, 13005

Actively Recruiting

35

Chu Nantes - Hătel Dieu

Nantes, France, 44093

Actively Recruiting

36

Institut Claudius Regaud

Toulouse, France, 31100

Actively Recruiting

37

ICL - Alexis Vautrin

Vandœuvre-lès-Nancy, France, 54500

Actively Recruiting

38

Institut Gustave Roussy

Villejuif, France, 94805

Actively Recruiting

39

Krankenhaus Nordwest GmbH

Frankfurt, Germany, 60488

Actively Recruiting

40

Bacs-Kiskun Varmegyei Oktatokorhaz

Kecskemét, Hungary, 6000

Actively Recruiting

41

Humanitas Gavazzeni

Bergamo, Italy, 24125

Actively Recruiting

42

IRCCS Ospedale Policlinico San Martino

Genova, Italy, 16132

Actively Recruiting

43

AOU Federico II - Oncologia Clinica

Naples, Italy, 80131

Actively Recruiting

44

Centro Ricerche Cliniche di Verona s.r.l.

Verona, Italy, 37134

Actively Recruiting

45

Saitama Medical University International Medical Center

Hidaka, Japan, 350-1298

Actively Recruiting

46

National Cancer Center Hospital East

Kashiwa-shi, Japan, 277-8577

Actively Recruiting

47

NHO Shikoku Cancer Center

Matsuyama, Japan, 791-0245

Actively Recruiting

48

Shizuoka Cancer Center

Nagaizumi-cho, Japan, 411-8777

Actively Recruiting

49

Aichi Cancer Center Hospital

Nagoya, Japan, 464-8681

Actively Recruiting

50

Kindai University Hospital

Osakasayama-shi, Japan, 589-8511

Actively Recruiting

51

National Cancer Center Hospital

Tokyo, Japan, 104-0045

Actively Recruiting

52

Cancer Institute Hospital of JFCR

Tokyo, Japan, 135-8550

Actively Recruiting

53

Yokohama City University Medical Center

Yokohama, Japan, 232-0024

Actively Recruiting

54

Amsterdam UMC locatie Vumc

Amsterdam, Netherlands, 1081 HV

Actively Recruiting

55

Universitair Medisch Centrum Groningen

Groningen, Netherlands, 9713 GZ

Actively Recruiting

56

Leids Universitair Medisch Centrum

Leiden, Netherlands, 2333 ZG

Actively Recruiting

57

Maastricht University Medical Center

Maastricht, Netherlands, 6229 HX

Actively Recruiting

58

Radboud University Medical Center

Nijmegen, Netherlands, 6525 GA

Actively Recruiting

59

Akershus universitetssykehus

Lørenskog, Norway, 1478

Actively Recruiting

60

Haukeland universitetssjukehus

Lørenskog, Norway, 1478

Actively Recruiting

61

Oslo Universitetssykehus HF, Radiumhospitalet

Oslo, Norway, 0379

Actively Recruiting

62

Cha Bundang Medical Center, Cha University

Seongnam, South Korea, 13496

Actively Recruiting

63

Seoul National University Bundang Hospital

Seongnam, South Korea, 13620

Actively Recruiting

64

Seoul National University Hospital

Seoul, South Korea, 03080

Actively Recruiting

65

Severance Hospital, Yonsei University Health System

Seoul, South Korea, 03722

Actively Recruiting

66

Asan Medical Center

Seoul, South Korea, 05505

Actively Recruiting

67

Samsung Medical Center

Seoul, South Korea, 06351

Actively Recruiting

68

Hospital Universitari Vall D'Hebron

Barcelona, Spain, 08035

Actively Recruiting

69

Hospital Clinic de Barcelona

Barcelona, Spain, 08036

Actively Recruiting

70

Hospital de La Santa Creu I Sant Pau

Barcelona, Spain, 08041

Actively Recruiting

71

Hospital General Universitario Gregorio Marañon

Madrid, Spain, 28009

Actively Recruiting

72

Hospital Universitario Ramon Y Cajal

Madrid, Spain, 28034

Actively Recruiting

73

Hospital Universitario 12 de Octubre

Madrid, Spain, 28041

Actively Recruiting

74

HOSPITAL REGIONAL UNIVERSITARIO de MALAGA AVDA.

Málaga, Spain, 29010

Actively Recruiting

75

Hospital Universitario Virgen Macarena

Seville, Spain, 41009

Actively Recruiting

76

Hospital Clinico Universitario de Valencia

Valencia, Spain, 46010

Actively Recruiting

77

Kaohsiung Chang Gung Memorial Hospital

Kaohsiung City, Taiwan, 833

Actively Recruiting

78

National Cheng Kung University Hospital

Tainan, Taiwan, 704

Actively Recruiting

79

National Taiwan University Hospital

Taipei, Taiwan, 100225

Actively Recruiting

80

Taipei Veterans General Hospital

Taipei, Taiwan, 11217

Actively Recruiting

81

Chang Gung Memorial Hospital

Taoyuan, Taiwan, 333

Actively Recruiting

82

University Hospital Coventry

Coventry, United Kingdom, CV2 2DX

Actively Recruiting

83

Barts Hospital

London, United Kingdom, EC1A 7BE

Actively Recruiting

84

Royal Free Hospital

London, United Kingdom, NW3 2QG

Actively Recruiting

85

Nottingham City Hospital Campus

Nottingham, United Kingdom, NG5 1PB

Actively Recruiting

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Research Team

D

Daiichi Sankyo Contact for Clinical Trial Information

How is the study designed?

Study Type

INTERVENTIONAL

Masking

NONE

Allocation

NA

Model

SINGLE_GROUP

Primary Purpose

TREATMENT

Number of Arms

1

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Published Research Related To This Trial

HERTHENA-PanTumor01: a phase II study of patritumab deruxtecan (HER3-DXd) in previously treated advanced solid tumors.

Thomas Powles, Aarti Bhatia, Barbara Burtness...

https://pubmed.ncbi.nlm.nih.gov/41088723