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Stor MLE, Horbach SER, Lokhorst MM, Tan E, Maas SM, van Noesel CJM, van der Horst CMAM. Genetic mutations and phenotype characteristics in peripheral vascular malformations: A systematic review. J Eur Acad Dermatol Venereol 2024; 38:1314-1328. [PMID: 38037869 DOI: 10.1111/jdv.19640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 08/29/2023] [Indexed: 12/02/2023]
Abstract
Vascular malformations (VMs) are clinically diverse with regard to the vessel type, anatomical location, tissue involvement and size. Consequently, symptoms and disease impact differ significantly. Diverse causative mutations in more and more genes are discovered and play a major role in the development of VMs. However, the relationship between the underlying causative mutations and the highly variable phenotype of VMs is not yet fully understood. In this systematic review, we aimed to provide an overview of known causative mutations in genes in VMs and discuss associations between the causative mutations and clinical phenotypes. PubMed and EMBASE libraries were systematically searched on November 9th, 2022 for randomized controlled trials and observational studies reporting causative mutations in at least five patients with peripheral venous, lymphatic, arteriovenous and combined malformations. Study quality was assessed with the Newcastle-Ottawa Scale. Data were extracted on patient and VM characteristics, molecular sequencing method and results of molecular analysis. In total, 5667 articles were found of which 69 studies were included, reporting molecular analysis in a total of 4261 patients and 1686 (40%) patients with peripheral VMs a causative mutation was detected. In conclusion, this systematic review provides a comprehensive overview of causative germline and somatic mutations in various genes and associated phenotypes in peripheral VMs. With these findings, we attempt to better understand how the underlying causative mutations in various genes contribute to the highly variable clinical characteristics of VMs. Our study shows that some causative mutations lead to a uniform phenotype, while other causal variants lead to more varying phenotypes. By contrast, distinct causative mutations may lead to similar phenotypes and result in almost indistinguishable VMs. VMs are currently classified based on clinical and histopathology features, however, the findings of this systematic review suggest a larger role for genotype in current diagnostics and classification.
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Affiliation(s)
- M L E Stor
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - S E R Horbach
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - M M Lokhorst
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - E Tan
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - S M Maas
- Department of Clinical Genetics, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - C J M van Noesel
- Department of Pathology, Molecular Diagnostics, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
| | - C M A M van der Horst
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands
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Bellucca S, Carli D, Gazzin A, Massuras S, Cardaropoli S, Luca M, Coppo P, Caprioglio M, La Selva R, Piglionica M, Bontempo P, D'Elia G, Bagnulo R, Ferrero GB, Resta N, Mussa A. Molecular Basis and Diagnostic Approach to Isolated and Syndromic Lateralized Overgrowth in Childhood. J Pediatr 2024; 274:114177. [PMID: 38945442 DOI: 10.1016/j.jpeds.2024.114177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 06/24/2024] [Accepted: 06/24/2024] [Indexed: 07/02/2024]
Abstract
OBJECTIVE To demonstrate a high-yield molecular diagnostic workflow for lateralized overgrowth (LO), a congenital condition with abnormal enlargement of body parts, and to classify it by molecular genetics. STUDY DESIGN We categorized 186 retrospective cases of LO diagnosed between 2003 and 2023 into suspected Beckwith-Wiedemann spectrum, PIK3CA-related overgrowth spectrum (PROS), vascular overgrowth, or isolated LO, based on initial clinical assessments, to determine the appropriate first-tier molecular tests and tissue for analysis. Patients underwent testing for 11p15 epigenetic abnormalities or somatic variants in genes related to PI3K/AKT/mTOR, vascular proliferation, and RAS-MAPK cascades using blood or skin DNA. For cases with negative initial tests, a sequential cascade molecular approach was employed to improve diagnostic yield. RESULTS This approach led to a molecular diagnosis in 54% of cases, 89% of cases consistent with initial clinical suspicions, and 11% reclassified. Beckwith-Wiedemann spectrum was the most common cause, with 43% of cases exhibiting 11p15 abnormalities. PIK3CA-related overgrowth spectrum had the highest confirmation rate, with 74% of clinically diagnosed patients showing a PIK3CA variant. Vascular overgrowth demonstrated significant clinical overlap with other syndromes. A molecular diagnosis of isolated LO proved challenging, with only 21% of cases classifiable into a specific condition. CONCLUSIONS LO is underdiagnosed from a molecular viewpoint and to date has had no diagnostic guidelines, which is crucial for addressing potential cancer predisposition, enabling precision medicine treatments, and guiding management. This study sheds light on the molecular etiology of LO, highlighting the importance of a tailored diagnostic approach and of selecting appropriate testing to achieve the highest diagnostic yield.
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Affiliation(s)
- Simone Bellucca
- Postgraduate School of Pediatrics, University of Torino, Turin, Italy
| | - Diana Carli
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Andrea Gazzin
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, Turin, Italy; Pediatric Clinical Genetics Unit, Regina Margherita Childrens' Hospital, Torino, Italy
| | - Stefania Massuras
- Pediatric Clinical Genetics Unit, Regina Margherita Childrens' Hospital, Torino, Italy; Department of Pediatric and Public Health Sciences, University of Torino, Torino, Italy
| | - Simona Cardaropoli
- Department of Pediatric and Public Health Sciences, University of Torino, Torino, Italy
| | - Maria Luca
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Paola Coppo
- Pediatric Dermatology Unit, Regina Margherita Childrens' Hospital, Torino, Italy
| | - Mirko Caprioglio
- Department of Pediatric and Public Health Sciences, University of Torino, Torino, Italy
| | - Roberta La Selva
- Pediatric Dermatology Unit, Regina Margherita Childrens' Hospital, Torino, Italy
| | - Marilidia Piglionica
- Medical Genetics Section, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University Hospital Consortium Corporation Polyclinics of Bari, Bari, Italy
| | - Piera Bontempo
- Laboratory of Medical Genetics, Molecular Genetics Unit, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - Gemma D'Elia
- Laboratory of Medical Genetics, Molecular Genetics Unit, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - Rosanna Bagnulo
- Medical Genetics Section, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University Hospital Consortium Corporation Polyclinics of Bari, Bari, Italy
| | | | - Nicoletta Resta
- Medical Genetics Section, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University Hospital Consortium Corporation Polyclinics of Bari, Bari, Italy
| | - Alessandro Mussa
- Pediatric Clinical Genetics Unit, Regina Margherita Childrens' Hospital, Torino, Italy; Department of Pediatric and Public Health Sciences, University of Torino, Torino, Italy.
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Hammill AM, Boscolo E. Capillary malformations. J Clin Invest 2024; 134:e172842. [PMID: 38618955 PMCID: PMC11014659 DOI: 10.1172/jci172842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024] Open
Abstract
Capillary malformation (CM), or port wine birthmark, is a cutaneous congenital vascular anomaly that occurs in 0.1%-2% of newborns. Patients with a CM localized on the forehead have an increased risk of developing a neurocutaneous disorder called encephalotrigeminal angiomatosis or Sturge-Weber syndrome (SWS), with complications including seizure, developmental delay, glaucoma, and vision loss. In 2013, a groundbreaking study revealed causative activating somatic mutations in the gene (GNAQ) encoding guanine nucleotide-binding protein Q subunit α (Gαq) in CM and SWS patient tissues. In this Review, we discuss the disease phenotype, the causative GNAQ mutations, and their cellular origin. We also present the endothelial Gαq-related signaling pathways, the current animal models to study CM and its complications, and future options for therapeutic treatment. Further work remains to fully elucidate the cellular and molecular mechanisms underlying the formation and maintenance of the abnormal vessels.
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Affiliation(s)
- Adrienne M. Hammill
- Division of Hematology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Elisa Boscolo
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
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Woodis KM, Garlisi Torales LD, Wolf A, Britt A, Sheppard SE. Updates in Genetic Testing for Head and Neck Vascular Anomalies. Oral Maxillofac Surg Clin North Am 2024; 36:1-17. [PMID: 37867039 PMCID: PMC11092895 DOI: 10.1016/j.coms.2023.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
Vascular anomalies include benign or malignant tumors or benign malformations of the arteries, veins, capillaries, or lymphatic vasculature. The genetic etiology of the lesion is essential to define the lesion and can help navigate choice of therapy. . In the United States, about 1.2% of the population has a vascular anomaly, which may be underestimating the true prevalence as genetic testing for these conditions continues to evolve.
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Affiliation(s)
- Kristina M Woodis
- Unit on Vascular Malformations, Division of Intramural Research, Eunice Kennedy Shriver National Institute for Child Health and Human Development, 10 Center Drive, MSC 1103, Bethesda, MD 20892-1103, USA
| | - Luciana Daniela Garlisi Torales
- Unit on Vascular Malformations, Division of Intramural Research, Eunice Kennedy Shriver National Institute for Child Health and Human Development, 10 Center Drive, MSC 1103, Bethesda, MD 20892-1103, USA
| | - Alejandro Wolf
- Department of Pathology and ARUP Laboratories, University of Utah, 2000 Circle of Hope, Room 3100, Salt Lake City, UT 84112, USA
| | - Allison Britt
- Comprehensive Vascular Anomalies Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sarah E Sheppard
- Unit on Vascular Malformations, Division of Intramural Research, Eunice Kennedy Shriver National Institute for Child Health and Human Development, 10 Center Drive, MSC 1103, Bethesda, MD 20892-1103, USA.
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Gazzin A, Leoni C, Viscogliosi G, Borgini F, Perri L, Iacoviello M, Piglionica M, De Pellegrin M, Ferrero GB, Bartuli A, Zampino G, Buonuomo PS, Resta N, Mussa A. Work-Up and Treatment Strategies for Individuals with PIK3CA-Related Disorders: A Consensus of Experts from the Scientific Committee of the Italian Macrodactyly and PROS Association. Genes (Basel) 2023; 14:2134. [PMID: 38136956 PMCID: PMC10742781 DOI: 10.3390/genes14122134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/23/2023] [Accepted: 11/25/2023] [Indexed: 12/24/2023] Open
Abstract
PIK3CA-related disorders encompass many rare and ultra-rare conditions caused by somatic genetic variants that hyperactivate the PI3K-AKT-mTOR signaling pathway, which is essential for cell cycle control. PIK3CA-related disorders include PIK3CA-related overgrowth spectrum (PROS), PIK3CA-related vascular malformations and PIK3CA-related non-vascular lesions. Phenotypes are extremely heterogeneous and overlapping. Therefore, diagnosis and management frequently involve various health specialists. Given the rarity of these disorders and the limited number of centers offering optimal care, the Scientific Committee of the Italian Macrodactyly and PROS Association has proposed a revision of the most recent recommendations for the diagnosis, molecular testing, clinical management, follow-up, and treatment strategies. These recommendations give insight on molecular diagnosis, eligible samples, preferable sequencing, and validation methods and management of negative results. The purpose of this paper is to promote collaboration between health care centers and clinicians with a joint shared approach. Finally, we suggest the direction of present and future research studies, including new systemic target therapies, which are currently under evaluation in several clinical trials, such as specific inhibitors that can be employed to downregulate the signaling pathway.
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Affiliation(s)
- Andrea Gazzin
- Clinical Pediatric Genetics Unit, Department of Public Health and Pediatrics, University of Torino, Regina Margherita Children’s Hospital, 10126 Torino, Italy; (A.G.); (A.M.)
- Postgraduate School of Pediatrics, University of Torino, 10126 Torino, Italy
| | - Chiara Leoni
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli, IRCCS, 00168 Rome, Italy; (G.V.); (L.P.); (G.Z.)
| | - Germana Viscogliosi
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli, IRCCS, 00168 Rome, Italy; (G.V.); (L.P.); (G.Z.)
| | - Federica Borgini
- Italian Macrodactyly and PROS Association, 27010 San Genesio ed Uniti (PV), Italy;
| | - Lucrezia Perri
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli, IRCCS, 00168 Rome, Italy; (G.V.); (L.P.); (G.Z.)
| | - Matteo Iacoviello
- Medical Genetics Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.I.); (M.P.); (N.R.)
| | - Marilidia Piglionica
- Medical Genetics Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.I.); (M.P.); (N.R.)
| | - Maurizio De Pellegrin
- Pediatric Orthopedic Unit, Piccole Figlie Hospital, 43125 Parma, Italy
- Department of Orthopedics, ASST Ospedale Papa Giovanni XXIII, 24127 Bergamo, Italy
| | | | - Andrea Bartuli
- Rare Disease and Medical Genetics Unit, Bambino Gesù Children’s Hospital, IRCCS, 00168 Rome, Italy; (A.B.); (P.S.B.)
| | - Giuseppe Zampino
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli, IRCCS, 00168 Rome, Italy; (G.V.); (L.P.); (G.Z.)
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Paola Sabrina Buonuomo
- Rare Disease and Medical Genetics Unit, Bambino Gesù Children’s Hospital, IRCCS, 00168 Rome, Italy; (A.B.); (P.S.B.)
| | - Nicoletta Resta
- Medical Genetics Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.I.); (M.P.); (N.R.)
| | - Alessandro Mussa
- Clinical Pediatric Genetics Unit, Department of Public Health and Pediatrics, University of Torino, Regina Margherita Children’s Hospital, 10126 Torino, Italy; (A.G.); (A.M.)
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Bolli A, Nriagu B, Britt AD, Toole AD, Treat J, Srinivasan A, Sheppard SE. Mosaic pathogenic variants in AKT3 cause capillary malformation and undergrowth. Am J Med Genet A 2023; 191:1442-1446. [PMID: 36695285 PMCID: PMC10081949 DOI: 10.1002/ajmg.a.63121] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 12/20/2022] [Accepted: 01/04/2023] [Indexed: 01/26/2023]
Abstract
Capillary malformations are slow-flow vascular malformations that affect the microcirculation including capillaries and post capillary venules and can be associated with growth differences. Specifically, the association of capillary malformations with undergrowth is a vastly understudied vascular syndrome with few reports of genetic causes including PIK3CA, GNAQ, and GNA11. Recently, a somatic pathogenic variant in AKT3 was identified in one child with a cutaneous vascular syndrome similar to cutis marmorata telangiectatica congenita, undergrowth, and no neurodevelopmental features. Here, we present a male patient with a capillary malformation and undergrowth due to a somatic pathogenic variant in AKT3 to confirm this association. It is essential to consider that mosaic pathogenic variants in AKT3 can cause a wide spectrum of disease. There is a need for future studies focusing on capillary malformations with undergrowth to understand the underlying mechanism.
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Affiliation(s)
- Amber Bolli
- Comprehensive Vascular Anomaly Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Bede Nriagu
- Comprehensive Vascular Anomaly Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Allison D. Britt
- Comprehensive Vascular Anomaly Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Anjali D. Toole
- Department of Physical Therapy, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - James Treat
- Comprehensive Vascular Anomaly Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Section of Dermatology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Abhay Srinivasan
- Comprehensive Vascular Anomaly Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Radiology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Sarah E. Sheppard
- Unit on Vascular Malformations, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland, USA
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Triana P, Sarmiento MDC, Rodriguez-Laguna L, Martinez-Glez V, Lopez-Gutierrez JC. Undergrowth Of First Toe In PiK3CA-Related Overgrowth Spectrum (PROS). Ann Vasc Surg 2023; 88:233-238. [PMID: 35878698 DOI: 10.1016/j.avsg.2022.06.097] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/02/2022] [Accepted: 06/27/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND PIK3CA-related overgrowth syndrome (PROS) include a heterogeneous group of disorders characterized by segmental overgrowth secondary to somatic mosaic activating variants in PIK3CA. Segmental undergrowth is more uncommon and has been less studied but pathogenic variants in PIK3CA have also been found. With this in mind, we have noticed a group of patients with PROS that present an undergrowth component associated with their focal overgrowth. METHODS Retrospective review of patients with PROS presenting overgrowth of the lower limb and undergrowth of the ipsilateral first toe was performed. RESULTS Six patients were included, 4 female and 2 male with a median age of 16.8 years. All patients presented a PROS phenotype with overgrowth of the lower limb and undergrowth of ipsilateral first toe. A PIK3CA pathogenic variant was confirmed in all patients. Patients underwent multiple treatments, currently all are receiving alpelisib with a mean duration of 15.8 months (1-39) and partial response in lipomatosis and vascular anomalies but no response in overgrowth and undergrowth so far. CONCLUSIONS Pathogenic variants in the same gene can create different phenotypes depending on the time and place of the mutation. There is little information regarding opposing phenotpyes in the same patient with PROS. The presence of undergrowth in our series might be explained by genetic, embryogenic, maternal, or placental factors but needs to be further investigated.
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Affiliation(s)
- Paloma Triana
- Pediatric surgery, La Paz Children's Hospital, Madrid, Spain.
| | | | - Lara Rodriguez-Laguna
- Vascular Malformations Section, Institute of Medical and Molecular Genetics, INGEMM-IdiPAZ, La Paz Hospital, Madrid, Spain
| | - Victor Martinez-Glez
- Vascular Malformations Section, Institute of Medical and Molecular Genetics, INGEMM-IdiPAZ, La Paz Hospital, Madrid, Spain; CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
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Abstract
Sturge-Weber syndrome (SWS) is a rare, noninherited neurovascular disorder characterized by abnormal vasculature in the brain, skin, and eye. Patients with SWS characteristically have facial capillary malformation, also known as port-wine birthmark, a leptomeningeal vascular malformation seen on contrast-enhanced magnetic resonance imaging images, abnormal blood vessels in the eye, and glaucoma. Patients with SWS have impaired perfusion to the brain and are at high risk of venous stroke and stroke-like episodes, seizures, and both motor and cognitive difficulties. While the activating R183Q GNAQ somatic mutation is the most common somatic mutation underlying SWS, recent research also implicates that GNA11 and GNB2 somatic mutations are related to SWS. Recent retrospective studies suggest the use of low-dose aspirin and vitamin D in treatment for SWS and prospective drug trials have supported the usefulness of cannabidiol and Sirolimus. Presymptomatic treatment with low-dose aspirin and antiepileptic drugs shows promising results in delaying seizure onset in some patients. This review focuses on the latest progress in the field of research for Sturge-Weber syndrome and highlights directions for future research.
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Affiliation(s)
- SangEun Yeom
- Department of Neurology and Developmental Medicine, Hugo Moser Kennedy Krieger Research Institute, Baltimore, Maryland, USA
| | - Anne M. Comi
- Department of Neurology and Developmental Medicine, Hugo Moser Kennedy Krieger Research Institute, Baltimore, Maryland, USA
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
- Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Angulo-Urarte A, Graupera M. When, where and which PIK3CA mutations are pathogenic in congenital disorders. NATURE CARDIOVASCULAR RESEARCH 2022; 1:700-714. [PMID: 39196083 DOI: 10.1038/s44161-022-00107-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 06/22/2022] [Indexed: 08/29/2024]
Abstract
PIK3CA encodes the class I PI3Kα isoform and is frequently mutated in cancer. Activating mutations in PIK3CA also cause a range of congenital disorders featuring asymmetric tissue overgrowth, known as the PIK3CA-related overgrowth spectrum (PROS), with frequent vascular involvement. In PROS, PIK3CA mutations arise postzygotically, during embryonic development, leading to a mosaic body pattern distribution resulting in a variety of phenotypic features. A clear skewed pattern of overgrowth favoring some mesoderm-derived and ectoderm-derived tissues is observed but not understood. Here, we summarize our current knowledge of the determinants of PIK3CA-related pathogenesis in PROS, including intrinsic factors such as cell lineage susceptibility and PIK3CA variant bias, and extrinsic factors, which refers to environmental modifiers. We also include a section on PIK3CA-related vascular malformations given that the vasculature is frequently affected in PROS. Increasing our biological understanding of PIK3CA mutations in PROS will contribute toward unraveling the onset and progression of these conditions and ultimately impact on their treatment. Given that PIK3CA mutations are similar in PROS and cancer, deeper insights into one will also inform about the other.
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Affiliation(s)
- Ana Angulo-Urarte
- Endothelial Pathobiology and Microenvironment Group, Josep Carreras Leukaemia Research Institute (IJC), Barcelona, Spain.
| | - Mariona Graupera
- Endothelial Pathobiology and Microenvironment Group, Josep Carreras Leukaemia Research Institute (IJC), Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain.
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