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GVV858

Phase 1

Advanced HR+/HER2- Breast Cancer | Small molecule | Oncology |Novartis AG|Last Updated: Jul 30, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMC
Total Trials1
Total Enrollment205

FDA Designations

No designations recorded

Clinical trial landscape

GVV858 · 1 trial · 3 indications

Phase 1 1
NCT07288359Study of GVV858 as a Single Agent or in Combination With Endocrine Therapy in Patients With HR+/HER2- Breast Cancer and Other Advanced Solid TumorsAdvanced HR+/HER2- Breast Cancer
RECRUITING205 Analytics
PHASE1RECRUITING
Study of GVV858 as a Single Agent or in Combination With Endocrine Therapy in Patients With HR+/HER2- Breast Cancer and Other Advanced Solid Tumors
Advanced HR+/HER2- Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase I: Incidence and severity of dose-limiting toxicities (DLTs)
28 days

Number of participants with DLTs. A DLT is defined as an adverse event or abnormal laboratory value of Common Terminology Criteria for Adverse Events (CTCAE) grade 3 or higher, unless clearly and inconvertibly assessed as due to disease progression, inter-current illness/injury, concomitant medications, or extraneous causes, that occurs within the first 28 days of treatment in the Phase 1 part. Other clinically significant toxicities may be considered to be DLTs, even if not CTCAE grade 3 or higher.

Phase I and phase II: Incidence and severity of adverse events (AEs) and serious adverse events (SAEs)
Up to approximately 2 years

Number of participants with AEs and SAEs, including changes in vital signs, electrocardiograms (ECGs) and laboratory values qualifying and reported as AEs.

Phase I and phase II: Frequency of dose interruptions, reductions and discontinuations
Up to approximately 2 years

Number of participants with dose adjustments (reductions, interruption, or permanent discontinuation) as a measure of tolerability.

Phase I and phase II: Dose intensity
Up to approximately 2 years

The dose intensity of each study drug is computed as the ratio of actual cumulative dose received and actual duration of exposure.

Secondary Endpoints

Phase I and II: Peak plasma concentration (Cmax) of GVV858
Cycle 1 Day 1 and/or Day 21: From pre-dose up to maximum 24 hours post dose. The duration of one cycle is 28 days.
Phase I and II: Time to reach peak plasma concentration (Tmax) of GVV858
Cycle 1 Day 1 and/or Day 21: From pre-dose up to maximum 24 hours post dose. The duration of one cycle is 28 days.
Phase I and II: Area under the plasma concentration-time curve (AUC) of GVV858
Cycle 1 Day 1 and/or Day 21: From pre-dose up to maximum 24 hours post dose. The duration of one cycle is 28 days.
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
GVV858 Single Agent (Arm A)EXPERIMENTALPhase I
GVV858 in combination with fulvestrant (Arm B)EXPERIMENTALPhase I
GVV858 in combination with letrozole (Arm C)EXPERIMENTALPhase I
GVV858 in combination with fulvestrant (Arm D)EXPERIMENTALPhase II, recommended dose regimen 1
GVV858 in combination with fulvestrant (Arm E)EXPERIMENTALPhase II, recommended dose regimen 2, optional dose optimization

Interventions

NameTypeDescription
GVV858DRUGExperimental
FulvestrantDRUGApproved medication
LetrozoleDRUGApproved medication
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites15

Inclusion Criteria: * Age ≥ 18 years old. * Patients with one of the following histologically or cytologically confirmed advanced cancers: Phase I (patients with one of the following cancers, from whom no standard therapy is available or appropriate in the judgment of the investigator): * HR+/HER...

Countries:United StatesCzechiaDenmarkFranceGermanyItalyJapanSingaporeSpainTaiwan
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Competitive Landscape -Breast Cancer 402 trials (matched to "Advanced HR+/HER2- Breast Cancer")

Top 20 of 92 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN47PHASE3Fulvestrant, Capivasertib
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant
BeOne Medicines Ltd. Sponsored ADRONC5PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib
Relay Therapeutics, Inc.RLAY2PHASE3Zovegalisib, Capivasertib, Fulvestrant
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX2PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam
Atossa Therapeutics, Inc.ATOS1PHASE2endoxifen, goserelin
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Recent Changes (Last 90 Days)

LOWJul 30, 2026NCT07288359lastUpdatePostDate: changed
LOWJul 30, 2026NCT07288359lastUpdatePostDate: changed
LOWJul 7, 2026NCT07288359lastUpdatePostDate: changed
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LOWJul 6, 2026NCT07288359lastUpdatePostDate: changed
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LOWJun 30, 2026NCT07288359lastUpdatePostDate: changed
LOWJun 30, 2026NCT07288359lastUpdatePostDate: changed
LOWJun 30, 2026NCT07288359lastUpdatePostDate: changed
LOWJun 23, 2026NCT07288359lastUpdatePostDate: changed
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LOWJun 18, 2026NCT07288359lastUpdatePostDate: changed
LOWJun 18, 2026NCT07288359lastUpdatePostDate: changed
LOWJun 18, 2026NCT07288359lastUpdatePostDate: changed

Frequently asked questions about GVV858

What is GVV858 used for in advanced HR+/HER2- breast cancer?

GVV858 is an investigational small molecule being studied for the treatment of advanced HR+/HER2- breast cancer. It is also being evaluated in advanced CCNE1-amplified solid tumors and metastatic castration-resistant prostate cancer. The drug is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

Who is developing GVV858?

GVV858 is being developed by Novartis AG, a multinational pharmaceutical company traded on the New York Stock Exchange under the ticker symbol NVS. The company is conducting a Phase 1 clinical trial of GVV858 as a single agent or in combination with endocrine therapy for patients with HR+/HER2- breast cancer and other advanced solid tumors.

What phase is GVV858 in?

GVV858 is in Phase 1 clinical development. It is an investigational drug, meaning it has not yet received regulatory approval. The ongoing Phase 1 trial is actively recruiting participants and is designed to evaluate the safety and preliminary efficacy of GVV858 in patients with advanced HR+/HER2- breast cancer and other solid tumors.

What clinical trials is GVV858 in?

GVV858 is being studied in a single Phase 1 clinical trial with the identifier NCT07288359. This trial is recruiting 205 participants across multiple countries, including the United States, Japan, and several European nations. The study evaluates GVV858 as a monotherapy or in combination with endocrine therapy in patients with advanced HR+/HER2- breast cancer, CCNE1-amplified solid tumors, and metastatic castration-resistant prostate cancer.

Is GVV858 being studied in combination with other treatments?

Yes, GVV858 is being studied both as a single agent and in combination with endocrine therapy. The Phase 1 clinical trial NCT07288359 is designed to assess the safety and tolerability of GVV858 when used alone or together with endocrine therapy in patients with advanced HR+/HER2- breast cancer and other advanced solid tumors.

What is the enrollment and design of the GVV858 clinical trial?

The Phase 1 trial of GVV858 (NCT07288359) is a randomized, controlled study with a planned enrollment of 205 participants. It is not double-blinded. The trial is open to adults aged 18 years and older of all sexes, and it is currently recruiting in the United States, Czechia, Denmark, France, Germany, Italy, Japan, Singapore, Spain, and Taiwan.