PharmD, PhD
PharmD, PhD
PhD
Our research explores the genomic and molecular basis of pediatric liver tumors to advance knowledge and improve treatment.
In the Genomics of Pediatric Liver Tumors group, we study tumor evolution using data from patient clinical features, whole-genome and exome sequencing, bulk RNAseq, single-cell, and spatial transcriptomics. We focus primarily on hepatoblastoma (HB), the most common pediatric liver cancer, as well as pediatric hepatocellular carcinoma (HCC), fibrolamellar carcinoma (FLC), and hepatocellular adenoma (HCA).
We partner with clinicians across France to gather samples and address key research questions, and work with Japanese teams to validate findings. We develop computational tools to integrate multi-scale data, exploring tumor evolution and chemotherapy resistance (Figure 1).
Context:
Tumor cells carry molecular changes (mutations, chromosome alterations) that affect gene function. We use computational methods to find recurring altered genes driving cancer, which can be somatic (tumor-specific) or germline/mosaic (predisposing), especially in early childhood cancers.
Published results:
By analyzing 122 tumor samples from 84 patients using whole-genome or whole-exome sequencing, we pinpointed key driver alterations in pediatric liver cancers (Hirsch et al, Cancer Discov 2021) (Figure 2).
HB and HCC converge on pathways like Wnt/β-catenin and IGF2 but differ in alteration types: HB often have mutations (e.g., CTNNB1), while HCC show deletions (e.g., AXIN1). Some HB patients have germline APC mutations linked to familial adenomatous polyposis, and a somatic second hit (Morcrette et al, Oncoimmunology 2019). Rare driver alterations predict poor chemotherapy response and survival (Pire et al, Eur J Cancer 2024). Alterations at the 11p15.5 locus, causing IGF2 overexpression, are a major driver. We found mosaic 11p15.5 changes in ~20% of HB patients’ non-tumor liver, marking preneoplastic cells and affecting liver function (Pilet et al, Nat Commun 2023).
Ongoing projects:
We aim to identify new driver alterations of pediatric liver cancers by expanding our cohort analyzed by whole-genome sequencing and bulk RNAseq. We have specific projects to further explore mosaic alterations at the single-cell and spatial level.
Context:
Tumor evolution is a multi-step process driven by mutations under immune and treatment pressures, leading to diverse phenotypes. We study how clonal changes and phenotypes connect to tumor evolution and resistance.
Published results:
Using RNAseq on 100 HB samples, we defined three transcriptomic groups tied to differentiation, proliferation, and immune response (Hirsch et al, Cancer Discov 2021) (Figure 3a). Multiple samples from the same tumor showed varied phenotypes despite shared drivers, indicating plasticity. Chemotherapy boosts immune infiltration in ‘Hepatocytic’ tumors but not ‘Liver Progenitor’ ones. Single-cell analysis confirmed these groups, revealing a continuum of cell states and subclonal diversity (Roehrig et al, Nat Commun 2024) (Figure 3b).
Ongoing projects:
We currently explore the intra-tumor heterogeneity of hepatoblastoma at the spatially-resolved single-cell level, by combining high-plex immunofluorescence, single-nucleus RNAseq and spatial transcriptomics.
Context:
Hepatoblastoma is treated with cisplatin-based chemotherapy, but some cases resist treatment, with few therapeutic alternatives.
Published results:
Whole-genome sequencing revealed cisplatin’s SBS35 mutational signature (Figure 4a) in a subset of primary hepatoblastomas post-chemotherapy, associated with poor treatment response (Hirsch et al, Cancer Discov 2021 ; Pire et al, Eur J Cancer 2024). In primary tumors, SBS35 mutations were subclonal, meaning they appeared in only a fraction of tumor cells, specifically within ‘Liver Progenitor’ sectors, while ‘Hepatocytic’ and ‘Mesenchymal’ areas lacked them. In contrast, relapse samples showed thousands of clonal SBS35 mutations, present in all tumor cells, indicating relapses arise from a single resistant cell that accumulated cisplatin-induced mutations during treatment (Figure 4b). Overall, the longitudinal analysis of cisplatin-induced mutations, integrated with the transcriptomic classification, pinpoints the ‘Liver Progenitor’ cells as being chemoresistant and at the origin of relapses.
Targeting PLK1, a ‘Liver Progenitor’ marker, reduced tumor growth in proof-of-concept experiments developed with Sandra Rebouissou’s group (Hirsch et al, Cancer Discov 2021).
Ongoing projects:
We’re refining detection of cisplatin mutations with machine learning and, with Sandra Rebouissou’s group, seeking drugs to reverse chemoresistance.
PhD
MD
PhD
MD
MD
Roehrig A, Hirsch TZ, Pire A, Morcrette G, Gupta B, Marcaillou C, Imbeaud S, Chardot C, Gonzales E, Jacquemin E, Sekiguchi M, Takita J, Nagae G, Hiyama E, Guérin F, Fabre M, Aerts I, Taque S, Laithier V, Branchereau S, Guettier C, Brugières L, Fresneau B, Zucman-Rossi J, Letouzé E. Nat Commun. 2024 Apr 8;15(1):3031. doi: 10.1038/s41467-024-47280-x. PMID: 38589411
Pire A, Hirsch TZ, Morcrette G, Imbeaud S, Gupta B, Pilet J, Cornet M, Fabre M, Guettier C, Branchereau S, Brugières L, Guerin F, Laithier V, Coze C, Nagae G, Hiyama E, Laurent-Puig P, Rebouissou S, Sarnacki S, Chardot C, Capito C, Faure-Conter C, Aerts I, Taque S, Fresneau B, Zucman-Rossi J. Eur J Cancer. 2024 Mar;200:113583. doi: 10.1016/j.ejca.2024.113583. Epub 2024 Feb 1. PMID: 38330765
Pilet J, Hirsch TZ, Gupta B, Roehrig A, Morcrette G, Pire A, Letouzé E, Fresneau B, Taque S, Brugières L, Branchereau S, Chardot C, Aerts I, Sarnacki S, Fabre M, Guettier C, Rebouissou S, Zucman-Rossi J. Nat Commun. 2023 Nov 6;14(1):7122. doi: 10.1038/s41467-023-42418-9. PMID: 37932266
Hirsch TZ, Pilet J, Morcrette G, Roehrig A, Monteiro BJE, Molina L, Bayard Q, Trépo E, Meunier L, Caruso S, Renault V, Deleuze JF, Fresneau B, Chardot C, Gonzales E, Jacquemin E, Guerin F, Fabre M, Aerts I, Taque S, Laithier V, Branchereau S, Guettier C, Brugières L, Rebouissou S, Letouzé E, Zucman-Rossi J. Cancer Discov. 2021 Oct;11(10):2524-2543. doi: 10.1158/2159-8290.CD-20-1809. Epub 2021 Apr 23. PMID: 33893148
Hirsch TZ, Negulescu A, Gupta B, Caruso S, Noblet B, Couchy G, Bayard Q, Meunier L, Morcrette G, Scoazec JY, Blanc JF, Amaddeo G, Nault JC, Bioulac-Sage P, Ziol M, Beaufrère A, Paradis V, Calderaro J, Imbeaud S, Zucman-Rossi J. J Hepatol. 2020 May;72(5):924-936. doi: 10.1016/j.jhep.2019.12.006. Epub 2019 Dec 18. PMID: 31862487
APC germline hepatoblastomas demonstrate cisplatin-induced intratumor tertiary lymphoid structures.
Morcrette G, Hirsch TZ, Badour E, Pilet J, Caruso S, Calderaro J, Martin Y, Imbeaud S, Letouzé E, Rebouissou S, Branchereau S, Taque S, Chardot C, Guettier C, Scoazec JY, Fabre M, Brugières L, Zucman-Rossi J. Oncoimmunology. 2019 Mar 28;8(6):e1583547. doi: 10.1080/2162402X.2019.1583547. eCollection 2019. PMID: 31069152
PhD
MD, PhD
“Therapeutic Targets in liver tumors”, led by Sandra Rebouissou Ph.D. & Jean-Charles NAULT M.D Ph.D., develops an integrated approach that extends from the study of the molecular basis of tumor initiation and progression to applications of targeted treatment and the identification of biomarkers predicting the therapeutic response. For this purpose, they develop two main research axes:
1) translational studies based on screening of anti-tumor molecules on large collections of adult and pediatric human liver cancer cell lines characterized extensively at the molecular level, combined with genomic analysis of tumor samples from patients included in clinical trials in order to link tumor molecular alterations and microenvironment to the clinical therapeutic response.
2) basic studies aimed at modeling in cellulo and in vivo the genetic alterations identified in human tumors in order to better identify the driver genes and their role in liver oncogenesis, and to understand the mechanisms of oncogenic cooperations.
MD, PhD
MD
PhD
MD
MD
MD
PharmD
MD student
APC germline hepatoblastomas demonstrate cisplatin-induced intratumor tertiary lymphoid structures. Morcrette G, Hirsch TZ, Badour E, Pilet J, Caruso S, Calderaro J, Martin Y, Imbeaud S, Letouzé E, Rebouissou S, Branchereau S, Taque S, Chardot C, Guettier C, Scoazec JY, Fabre M, Brugières L, Zucman-Rossi J. Oncoimmunology. 2019 Mar 28;8(6):e1583547. doi: 10.1080/2162402X.2019.1583547.
Analysis of Liver Cancer Cell Lines Identifies Agents With Likely Efficacy Against Hepatocellular Carcinoma and Markers of Response. Caruso S, Calatayud AL, Pilet J, La Bella T, Rekik S, Imbeaud S, Letouzé E, Meunier L, Bayard Q, Rohr-Udilova N, Péneau C, Grasl-Kraupp B, de Koning L, Ouine B, Bioulac-Sage P, Couchy G, Calderaro J, Nault JC, Zucman-Rossi J, Rebouissou S. Gastroenterology. 2019 May 4. pii: S0016-5085(19)36771-X. doi: 10.1053/j.gastro.2019.05.001.
Inhibiting Glutamine-Dependent mTORC1 Activation Ameliorates Liver Cancers Driven by β-Catenin Mutations. Adebayo Michael AO, Ko S, Tao J, Moghe A, Yang H, Xu M, Russell JO, Pradhan-Sundd T, Liu S, Singh S, Poddar M, Monga JS, Liu P, Oertel M, Ranganathan S, Singhi A, Rebouissou S, Zucman-Rossi J, Ribback S, Calvisi D, Qvartskhava N, Görg B, Häussinger D, Chen X, Monga SP. Cell Metab. 2019 May 7;29(5):1135-1150.e6. doi: 10.1016/j.cmet.2019.01.002. Epub 2019 Jan 31.
Argininosuccinate synthase 1 and periportal gene expression in sonic hedgehog hepatocellular adenomas. Nault JC, Couchy G, Caruso S, Meunier L, Caruana L, Letouzé E, Rebouissou S, Paradis V, Calderaro J, Zucman-Rossi J. Hepatology. 2018 Sep;68(3):964-976. doi: 10.1002/hep.29884. Epub 2018 Jun 6.
Note of caution: Contaminations of hepatocellular cell lines. Rebouissou S, Zucman-Rossi J, Moreau R, Qiu Z, Hui L. J Hepatol. 2017 Nov;67(5):896-897. doi: 10.1016/j.jhep.2017.08.002. Epub 2017 Aug 12.
MD, PhD
Collaborators: S Imbeaud (IR), C Peneau (PhD st), T La Bella (PhD st), J Zucman-Rossi (PUPH);
Involvement of pathogen agents in human carcinogenesis remain to be investigated. Our recent identification of AAV2 as the fourth virus involved in insertional mutagenesis prompt us to develop a project to evaluate consequences of HBV, HCV and AAV infections in liver tumorigenesis by integrating the analysis of viral and tumor genome alterations. Our aim is to reconstruct the natural history of the viruses (genome variation, replication, structural alterations, selection…) in the context of tumor cell selection in patients putatively treated by antiviral therapies or exposed to multiple pathogens. We will also search for additional pathogens in WGS data and collaborate with the international ICGC viruses project.
Fundings: LNCC, ANRS, Biomerieux Foundation
Collaborators: G Morcrette (PhD st), E Letouzé (CR Inserm), J Pilet (PhD st), S Imbeaud (IR), G Couchy (IE, PhD st), Julien Calderaro (pathologist), JC Nault (MCUPH), J Zucman-Rossi (PUPH); in cooperation with SIOPEL,
Most of pediatric liver neoplasms are poorly analyszed at the genomic and molecular level. They include hepatocellular carcinomas (HCC), fibrolamellar carcinomas (FLC), hepatoblastomas (HB), transitional liver cell tumors (TLCT) and also benign neoplasms, hepatocellular adenomas (HCA) and focal nodular hyperplasias (FNH). We aim to perform an integrated genomic analysis of these pediatric hepatocellular tumors to better understand their mechanism of tumorigenesis. To this purpose, we have collected a series of 193 patients with pediatric frozen liver tumors part of the national HEPATOBIO tumor resource. Within this series, 48 cases/67 frozen tumor samples have been selected for whole genome sequencing (WGS) and RNA sequencing (RNAseq) within the GEPELIN project funded by France Génomique for the WGS part. Our specific aims are to (1) identify putative driver genes altered in pediatric tumors and validate them functionally (2) perform new transcriptomic classification to derive new altered pathways and diagnostic/prognostic markers, (3) characterize the mutational and chromosome rearrangement signatures to identify new mechanism of carcinogenesis (4) search for therapeutic targets. These results will be compared with the adult liver tumors data that we have accumulated in the lab.
Fundings: LNCC, France Genomique.
Collaborators: E Letouzé , J Shinde , S Imbeaud (IR), L Meunier (PhD st), Q Bayard (M2), T Hirsch (Post-doc), J Zucman-Rossi (PUPH
In the last 5 years, we have generated large genomic data sets including 350 tumors analyzed by whole exome sequencing, 270 by RNA-seq, 250 by methylation arrays and 100 by whole genome sequencing. We will use this exceptional resource to unravel key questions in the natural history of liver cancers. (1) What mutational processes drive tumorigenesis? We have so far identified 10 point-mutation signatures associated with known (aflatoxin B1, tobacco) or unknown mutagenic processes in liver cancers. We will extend these analyses to signatures of indels and structural rearrangements, and perform a meta-analysis of all published liver cancer data sets to unravel the association of signatures with risk factors and predisposing variants. (2) What are the missing drivers in liver cancers? Analysis of coding mutations by us and others revealed tens of driver genes and pathways but 30% of tumors still have no identified driver event. In order to identify non-coding driver alterations, we will use whole genome and RNA-seq data to systematicallly screen for mutations and structural rearrangements modifying regulatory regions, chromatin context and 3’ UTR sequences and affecting mRNA expression and stability. (3) How to the genomic, epigenomic and transcriptional layers interact in tumor cells? We will develop innovative strategies to unravel the connexions between genomic alterations, DNA methylation and gene expression profiles. (4) What is the timing of genomic alterations along tumorigenesis? We and others have developed statistical approaches to time mutational signatures, copy-number alterations and driver events in the life history of a cancer using intra-tumor heterogeneity. We will conduct an ambitious project to analyze the evolution of genomic, transcriptional and micro-environment features in 25 patients with multiple samples along the treatment.
Fundings: Cancer environment, HTE HETCOLI, France Genomique, Canceropole
E Letouzé (CR Inserm), P Nahon (PUPH), E Trepo (Post-doc), J Yang (Ph st), JC Nault (MCUPH), Zucman-Rossi (PUPH)
Candidate gene studies have uncovered a limited number of variants reproducibly linked to hepatocellular carcinoma (HCC). The HECAM project aims to identify newgermline variants predisposing to HCC in the French population and to test their ability to modify patient care in clinical practice. Therefore, a genome-wide association study will be performed in a multicenter cohort of chronic liver disease patients with (n = 2,066) and without (n = 2,666) HCC using the Illumina Infinium Global Screening Array including ~ 660,000 markers). Validation of the top variants will be performed in two French replication cohorts of cirrhotic patients included in HCC surveillance programs (n = 2,249). The performance for HCC risk stratification will be finally assessed through integration of genetic information into specific algorithm-based prediction models. An original integrative approach including somatic information already generated will be used for prioritizing variants impacting liver carcinogenesis. Finally, genotype-phenotype associations will be performed to build prognostic models. We also plan to analyze benign liver tumors to search for genetic predisposition to the development of hepatocellular adenoma in a cohort of 500 patients with in parallel an epidemiological study.
Fundings: HECAM, ANRS, AFEF
MD, PhD
PhD
MD, PhD
MD, PhD
APC germline hepatoblastomas demonstrate cisplatin-induced intratumor tertiary lymphoid structures. Morcrette G, Hirsch TZ, Badour E, Pilet J, Caruso S, Calderaro J, Martin Y, Imbeaud S, Letouzé E, Rebouissou S, Branchereau S, Taque S, Chardot C, Guettier C, Scoazec JY, Fabre M, Brugières L, Zucman-Rossi J. Oncoimmunology. 2019 Mar 28;8(6):e1583547. doi: 10.1080/2162402X.2019.1583547. eCollection 2019.
Genomic Medicine and Implications for Hepatocellular Carcinoma Prevention and Therapy. Dhanasekaran R, Nault JC, Roberts LR, Zucman-Rossi J. Gastroenterology. 2019 Jan;156(2):492-509. doi: 10.1053/j.gastro.2018.11.001. Epub 2018 Nov 4. Review.
Systemic AA Amyloidosis Caused by Inflammatory Hepatocellular Adenoma. Calderaro J, Letouzé E, Bayard Q, Boulai A, Renault V, Deleuze JF, Bestard O, Franco D, Zafrani ES, Nault JC, Moutschen M, Zucman-Rossi J. N Engl J Med. 2018 Sep 20;379(12):1178-1180. doi: 10.1056/NEJMc1805673.
Argininosuccinate synthase 1 and periportal gene expression in sonic hedgehog hepatocellular adenomas. Nault JC, Couchy G, Caruso S, Meunier L, Caruana L, Letouzé E, Rebouissou S, Paradis V, Calderaro J, Zucman-Rossi J. Hepatology. 2018 Sep;68(3):964-976. doi: 10.1002/hep.29884. Epub 2018 Jun 6
Mutational signatures reveal the dynamic interplay of risk factors and cellular processes during liver tumorigenesis. Letouzé E, Shinde J, Renault V, Couchy G, Blanc JF, Tubacher E, Bayard Q, Bacq D, Meyer V, Semhoun J, Bioulac-Sage P, Prévôt S, Azoulay D, Paradis V, Imbeaud S, Deleuze JF, Zucman-Rossi J. Nat Commun. 2017 Nov 3;8(1):1315
Pro-angiogenic gene expression is associated with better outcome on sunitinib in metastatic clear-cell renal cell carcinoma. Beuselinck B, Verbiest A, Couchy G, Job S, de Reynies A, Meiller C, Albersen M, Verkarre V, Lerut E, Méjean A, Patard JJ, Laguerre B, Rioux-Leclercq N, Schöffski P, Oudard S, Zucman-Rossi J. Acta Oncol. 2018 Apr;57(4):498-508. doi: 10.1080/0284186X.2017.1388927. Epub 2017 Nov 2
PhD
Pleural mesothelioma is a rare tumor mainly linked to asbestos exposure, characterized by a poor prognosis and an urgent need for precision medicine strategies. Therefore, predicting response to current treatments and developing new therapies that account for the molecular and cellular heterogeneity of pleural mesothelioma is crucial. To meet these challenges, we are focusing our research on 3 major axes:
(1) Deciphering intra-tumour heterogeneity: Single-cell omics and emerging spatial omics approaches will help define the tumour cell subpopulations present in a single biopsy. This will allow us to better understand their plasticity and phenotypic evolution, as well as to dissect the landscape of immune and stromal cells composing the tumour microenvironment.
(2) Developing therapeutic strategy: Functional screening using knockdown and knockout approaches, along with pharmacogenomics studies using our large patient-derived primary cell line biobank will lead to the identification of new therapeutic targets and new effective anti-tumour drugs that consider the phenotypic diversity of tumours.
(3) Identifying biomarkers of response to treatment: We will uncover signatures or biomarkers that predict response to treatment through multi-omics integrated analysis of tumor sample collection from patients enrolled in clinical trials or treated in real-life settings.
These projects are carried out in partnership with several clinical departments and associations. Close collaborations with other research laboratories allow us to explore areas such as the contribution of specific immune subpopulations to treatment resistance in preclinical models, and the identification of risk factors for pleural mesothelioma beyond asbestos exposure.
Our research works has contributed to a better understanding of the molecular alterations but more importantly of the molecular heterogeneity of pleural mesothelioma. We were the first to propose a molecular classification of pleural mesothelioma that goes beyond the histologic classification and identifies specific molecular subtypes linked to mutational status. We also proposed a novel way to describe mesothelioma heterogeneity as a continuum using histo-molecular gradients that consider the main histologic types (epithelioid/sarcomatoid). We highlighted that these histo-molecular gradients identify tumours classified epithelioid at the histologic level, which are engaged towards the sarcomatoid phenotype. They do have strong prognostic value and may guide therapeutic strategies. Recent works have contributed to a better description of pleural mesothelioma anatomic intra-tumour heterogeneity. Importantly, we revealed genetic heterogeneity involving the major tumour suppressor gene NF2, as well as“hot” and “cold” immune profile of the tumour microenvironment depending on tumour positions in the thoracic cavity. Our results support the need to analyse multiple samples from distinct anatomical sites in order to estimate the prognosis or implement precision medicine strategies.
de Reynies et al, Clinical Cancer Research, 2014; Tranchant et al, Clinical Cancer Research, 2017; Blum et al, Nat Commun, 2019 ; Meiller Genome Med. 2021.
PhD
MD, PhD
MD, PhD
PharmD, PhD
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FunGeST “Functional genomics of solid tumors”, directed by Jessica Zucman-Rossi, was created in 2005, as Inserm U674, it was renewed in 2009, 2014 as UMR1162, ranked “incontournable” by Inserm as a mixed structure endorsed by four entities: Inserm, Universities Paris Diderot, Paris Descartes and Paris Nord. It is currently located at the University Hematology Institute site in a building managed by the CEPH (Centre d’Etude du Polymorphisme Humain, Foundation Jean Dausset). Since January 2019, the lab take part of Centre de Recherche des Cordeliers Research Center – Inserm UMR S1138, and as been recently renewed in January 2024.
Jessica Zucman-Rossi, is professor of Medicine in Oncology (PUPHex) at the University Paris Descartes and HEGP, dedicated full-time for research. She has directed the Inserm U674, U1162, and UMRS1138 FunGeST team since 2007, and served as chairman of the Inserm scientific committee devoted to Oncology, Genetics and Bioinformatics from 2012 to 2016. She is editor at the Journal of Hepatology (2023 IF=26.8), and the executive secretary of the International Liver Cancer Association (ILCA). She is internationally recognized in the field of genomics of human cancers, and particularly in liver tumors. Since January 2019, Pr. Zucman-Rossi has been the director of the Cordeliers Research Center, and was renewed for another 5-years in 2024.
Our mission is to develop basic genomic approaches based on human tumors analyses to identify new mechanisms of tumorigenesis and to transfer this knowledge into biomarkers and therapeutic targets that could be introduced in clinical care. In particular, we aim to identify new genomic alterations and mechanisms of carcinogenesis. We also aim to identify new risk factors and genetic predispositions promoting the development of tumors. Our major fields of research are related to liver tumors, mesothelioma and HPV-related cancers, mainly in adults but also in children for liver tumors.
Our team is multidisciplinary mixing basic researchers in genomics, genetics, cell biology, and bioinformatics with clinicians.
Our major topics are all centered on “bench to bedside” discoveries and vice versa:
Our strategies are based on large tumor collections with extensive clinical annotation (PRB Hôpitaux Universitaires Paris-Seine-Saint Denis, M Ziol, and other CRB at APHP hospitals and a national network), the development of innovative integrative genomic analyses, and the transfer into clinical care for the benefit of the patients. We are also actively developing productive scientific collaborations at CRC, regional, national, international, and industrial levels.
The team include a total of 45 peoples organized in 6 groups with their founded projects: