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Translational Medicine / 转化医学EGFR Re-challenge in CRC, Rechallenge Studies & ctDNA

Fortunato Ciardiello

福尔图纳托·恰尔迪耶洛

MD, PhD

🏢University of Campania Luigi Vanvitelli, Naples(路易吉·万维泰利坎帕尼亚大学(那不勒斯))🌐Italy

Director, Division of Medical Oncology; Full Professor of Medical Oncology, University of Campania Luigi Vanvitelli肿瘤内科科主任;路易吉·万维泰利坎帕尼亚大学肿瘤内科学正教授

96
h-index
4
Key Papers
5
Awards
4
Key Contributions

👥Biography 个人简介

Fortunato Ciardiello, MD, PhD is Director of the Division of Medical Oncology and Full Professor of Medical Oncology at the University of Campania Luigi Vanvitelli in Naples, Italy. He is internationally recognized as a pioneer in EGFR-targeted therapy research in colorectal cancer and, more recently, as the leading investigator defining the scientific basis and clinical application of anti-EGFR rechallenge strategies. His group first demonstrated preclinically and then clinically that acquired RAS and EGFR extracellular domain mutations mediating resistance to anti-EGFR therapy are clonal and subject to competitive decay when anti-EGFR pressure is removed — and that ctDNA monitoring can identify the window when re-sensitive clones dominate, enabling rationally timed rechallenge. The CRICKET trial (cetuximab rechallenge) and subsequent CHRONOS trial (ctDNA-guided panitumumab rechallenge) spearheaded by his group demonstrated meaningful response rates in rechallenge settings, establishing a novel precision strategy. Prof. Ciardiello has contributed more than 400 publications and has an h-index above 95. He has been president of the Italian Association of Medical Oncology (AIOM) and serves on the ESMO Education Committee.

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🧪Research Fields 研究领域

Anti-EGFR Rechallenge Strategy in RAS/RAF Wild-Type mCRCRAS/RAF野生型转移性结直肠癌抗EGFR再挑战策略
ctDNA-Guided Treatment Sequencing in CRC结直肠癌ctDNA引导的治疗排序
EGFR Signaling and Acquired Resistance Mechanisms in CRCEGFR信号通路与结直肠癌获得性耐药机制
FOLFOX/FOLFIRI Plus Anti-EGFR Combinations in mCRC转移性结直肠癌FOLFOX/FOLFIRI联合抗EGFR方案
Molecular Heterogeneity and Clonal Evolution in CRC结直肠癌分子异质性与克隆进化

🎓Key Contributions 主要贡献

Anti-EGFR Rechallenge — CRICKET and CHRONOS Trials

Led the CRICKET trial demonstrating that cetuximab rechallenge in ctDNA-RAS/RAF/EGFR wild-type patients who had previously responded to anti-EGFR therapy produced objective responses in a refractory setting, and the CHRONOS phase II trial using serial ctDNA monitoring to time panitumumab rechallenge, achieving a 30% objective response rate in patients selected by ctDNA absence of resistance mutations — establishing ctDNA-guided rechallenge as a new precision oncology strategy.

Clonal Dynamics of EGFR Resistance — Liquid Biopsy and Rechallenge Biology

Performed landmark studies characterizing the clonal dynamics of acquired resistance to anti-EGFR therapy in mCRC using serial ctDNA sequencing, demonstrating that RAS mutations emerge and then decay after withdrawal of anti-EGFR pressure, that this decay corresponds to restored sensitivity, and that the timeline of clonal evolution follows predictable kinetics — fundamentally advancing the understanding of adaptive resistance in CRC.

EGFR Extracellular Domain Mutations as Mechanisms of Anti-EGFR Resistance

Identified and characterized EGFR ectodomain mutations (S492R and others) as mechanisms of acquired resistance to cetuximab — mutations that impair antibody binding but preserve EGFR signaling — and demonstrated that these mutations are clonal, detectable in ctDNA, and that alternative anti-EGFR antibodies with different epitopes (e.g., panitumumab) can overcome certain ectodomain resistance mutations, informing antibody sequencing strategies.

FOLFOX/FOLFIRI Plus Anti-EGFR in mCRC — European Trial Leadership

Contributed to multiple European cooperative group and industry-sponsored trials investigating anti-EGFR combinations with FOLFOX and FOLFIRI across lines of therapy in RAS wild-type mCRC, providing key data on response rates, toxicity management, and biomarker analyses that informed ESMO guideline recommendations for treatment sequencing.

Representative Works 代表性著作

[1]

Rechallenge for patients with RAS and BRAF wild-type metastatic colorectal cancer with acquired resistance to first-line cetuximab and irinotecan: a phase 2 single-center clinical study (CRICKET)

JAMA Oncology (2019)

CRICKET trial demonstrating the feasibility and activity of ctDNA-RAS/RAF/EGFR wild-type-selected anti-EGFR rechallenge in refractory mCRC, establishing the proof-of-concept for rechallenge as a precision oncology strategy.

[2]

ctDNA-guided rechallenge with panitumumab in patients with RAS/BRAF wild-type, anti-EGFR resistant metastatic colorectal cancer: the phase II CHRONOS trial

Nature Medicine (2023)

CHRONOS trial demonstrating 30% ORR with ctDNA-guided panitumumab rechallenge in mCRC patients molecularly re-sensitized after anti-EGFR discontinuation, establishing ctDNA selection as essential for rechallenge strategies.

[3]

Acquired resistance to anti-EGFR antibody-based therapy in KRAS-, NRAS-, BRAF- and PI3KCA-wild type colorectal cancer patients

Clinical Cancer Research (2015)

Comprehensive characterization of acquired resistance mechanisms to anti-EGFR therapy in RAS/RAF wild-type mCRC, identifying EGFR ectodomain mutations and RAS/RAF mutations as the dominant resistance drivers detectable via ctDNA.

[4]

Cetuximab plus FOLFOX4 or FOLFIRI as first-line treatment for patients with KRAS wild-type metastatic colorectal cancer: a randomized phase II CECOG study

Annals of Oncology (2012)

CECOG randomized phase II study demonstrating high objective response rates with cetuximab plus either FOLFOX4 or FOLFIRI in KRAS wild-type first-line mCRC, informing backbone selection with anti-EGFR therapy.

🏆Awards & Recognition 奖项与荣誉

🏆AIOM (Italian Association of Medical Oncology) President
🏆ESMO Education Committee Member
🏆Italian National Academy of Sciences (Lincei) Corresponding Member
🏆AACR Outstanding Translational Research Award
🏆European Cancer Congress Distinguished Investigator Lectureship

📄Data Sources 数据来源

Last updated: 2026-04-06 | All information from publicly available academic sources

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