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Hayama M, Maeda Y, Obata S, Tsuda T, Takeda K, Nishida T, Inohara H. Understanding hereditary hemorrhagic telangiectasia: From genetic anomalies to systemic manifestations, quality of life, and epistaxis management-Exploring the otolaryngologist's integral role. Auris Nasus Larynx 2024; 51:305-312. [PMID: 38008660 DOI: 10.1016/j.anl.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/19/2023] [Accepted: 11/07/2023] [Indexed: 11/28/2023]
Abstract
Hereditary hemorrhagic telangiectasia (HHT), also known as Osler-Rendu-Weber syndrome, is a rare autosomal dominant disorder characterized by vascular malformations. This comprehensive review aimed to provide an overview and summarize various aspects of HHT, including the genetic abnormalities, complications associated with visceral arteriovenous malformations (AVMs), prognosis of HHT, quality of life (QOL), and treatment of epistaxis. In addition, this review highlights the challenges in diagnosing HHT and emphasizes the critical role of otolaryngologists in the early detection of HHT. Otolaryngologists can refer patients with refractory epistaxis for AVM screening to expedite intervention. Mutation of the genes involved in the transforming growth factor-β signaling pathway leads to the incidence of HHT, resulting in the formation of abnormal blood vessel formation. These vascular malformations commonly manifest as telangiectasia on the skin and mucous membranes; however, epistaxis remains the hallmark symptom of HHT. The impact of HHT goes beyond the visible symptoms and often includes the formation of life-threatening visceral AVMs in the lungs, liver, and brain. The prognosis of patients with HHT is closely related to the development of these complications, necessitating timely diagnosis and intervention. Refractory epistaxis diminishes the QOL of patients with HHT. The management of epistaxis ranges from conservative measures to advanced interventions such as prevention, conservative treatments, ablation, surgical procedures, and the administration of anti-angiogenic agents. However, effective management requires a multidisciplinary approach. The diagnosis of HHT remains challenging due to its variable presentation and lack of awareness among physicians. This review highlights the importance of reducing the duration between symptom onset and diagnosis. Otolaryngologists who are experienced in the management of refractory epistaxis can aid in identifying potential cases of HHT. They can facilitate the initiation of screening for visceral AVMs via prompt recognition of the signs and symptoms of HHT, contributing to improved patient outcomes. Early detection and intervention through screening can extend the life expectancy of patients with HHT to levels comparable with that of the general population. In conclusion, this review provides insight into various aspects of HHT and emphasizes the importance of timely diagnosis and intervention in the mitigation of the potentially life-threatening complications associated with this disorder. Otolaryngologists play a critical role in this process, serving as gatekeepers to the identification of cases of HHT and implementation of appropriate screening and management pathways, thereby improving the life expectancy and QOL of patients.
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Affiliation(s)
- Masaki Hayama
- Department of Otorhinolaryngology, Hyogo Prefectural Nishinomiya Hospital, Nishinomiya City, Hyogo, Japan; Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan.
| | - Yohei Maeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan; Department of Otorhinolaryngology, Japan Community Healthcare Organization Osaka Hospital, Osaka City, Osaka, Japan
| | - Sho Obata
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Takeshi Tsuda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Kazuya Takeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Takeo Nishida
- Department of Neurosurgery, Hyogo Prefectural Nishinomiya Hospital, Nishinomiya City, Hyogo, Japan; Department of Neurosurgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
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Al Tabosh T, Al Tarrass M, Tourvieilhe L, Guilhem A, Dupuis-Girod S, Bailly S. Hereditary hemorrhagic telangiectasia: from signaling insights to therapeutic advances. J Clin Invest 2024; 134:e176379. [PMID: 38357927 PMCID: PMC10866657 DOI: 10.1172/jci176379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024] Open
Abstract
Hereditary hemorrhagic telangiectsia (HHT) is an inherited vascular disorder with highly variable expressivity, affecting up to 1 in 5,000 individuals. This disease is characterized by small arteriovenous malformations (AVMs) in mucocutaneous areas (telangiectases) and larger visceral AVMs in the lungs, liver, and brain. HHT is caused by loss-of-function mutations in the BMP9-10/ENG/ALK1/SMAD4 signaling pathway. This Review presents up-to-date insights on this mutated signaling pathway and its crosstalk with proangiogenic pathways, in particular the VEGF pathway, that has allowed the repurposing of new drugs for HHT treatment. However, despite the substantial benefits of these new treatments in terms of alleviating symptom severity, this not-so-uncommon bleeding disorder still currently lacks any FDA- or European Medicines Agency-approved (EMA-approved) therapies.
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Affiliation(s)
- Tala Al Tabosh
- Biosanté Unit U1292, Grenoble Alpes University, INSERM, CEA, Grenoble, France
| | - Mohammad Al Tarrass
- Biosanté Unit U1292, Grenoble Alpes University, INSERM, CEA, Grenoble, France
| | - Laura Tourvieilhe
- Hospices Civils de Lyon, National HHT Reference Center and Genetics Department, Femme-Mère-Enfants Hospital, Bron, France
| | - Alexandre Guilhem
- Hospices Civils de Lyon, National HHT Reference Center and Genetics Department, Femme-Mère-Enfants Hospital, Bron, France
- TAI-IT Autoimmunité Unit RIGHT-UMR1098, Burgundy University, INSERM, EFS-BFC, Besancon, France
| | - Sophie Dupuis-Girod
- Biosanté Unit U1292, Grenoble Alpes University, INSERM, CEA, Grenoble, France
- Hospices Civils de Lyon, National HHT Reference Center and Genetics Department, Femme-Mère-Enfants Hospital, Bron, France
| | - Sabine Bailly
- Biosanté Unit U1292, Grenoble Alpes University, INSERM, CEA, Grenoble, France
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Niklasson J, Rönnblom A, Lidian A, Thor A. Oral manifestations and dental considerations of patients with hereditary hemorrhagic telangiectasia: a scoping review. Oral Surg Oral Med Oral Pathol Oral Radiol 2023; 136:691-702. [PMID: 37752017 DOI: 10.1016/j.oooo.2023.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/20/2023] [Accepted: 08/05/2023] [Indexed: 09/28/2023]
Abstract
OBJECTIVE We examined the range, nature, and extent of research conducted regarding the oral and dental implications of hereditary hemorrhagic telangiectasia (HHT) to identify gaps in the research and knowledge of the field. STUDY DESIGN We performed a scoping review according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews and 2017 Guidance for the Conduct of Joanna Briggs Institute Scoping Reviews. We searched the MEDLINE and Web of Science databases for all full-text articles published in English from December 1946 to October 2022. RESULTS We identified 103 articles describing oral and dental considerations of patients with HHT, primarily case reports. Most reported oral telangiectasias of the tongue, lips, and palate. Many reported management of bleeding and the use or recommendation of prophylactic antibiotics before dental procedures. CONCLUSIONS Oral telangiectasias are commonly found in patients with hereditary hemorrhagic telangiectasia, and dental professionals may be the first to diagnose it in their patients. Early detection and diagnosis are important to prevent potentially fatal outcomes, and prophylactic antibiotics before procedures may be warranted.
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Affiliation(s)
- Julia Niklasson
- Department of Plastic and Oral and Maxillofacial Surgery, Uppsala University, Uppsala, Sweden.
| | - Anders Rönnblom
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Adnan Lidian
- Department of Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden
| | - Andreas Thor
- Department of Plastic and Oral and Maxillofacial Surgery, Uppsala University, Uppsala, Sweden
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Chitsuthipakorn W, Hoang MP, Kanjanawasee D, Seresirikachorn K, Snidvongs K. Treatments of Epistaxis in Hereditary Hemorrhagic Telangiectasia: Systematic Review and Network Meta-Analysis. Curr Allergy Asthma Rep 2023; 23:689-701. [PMID: 37995018 DOI: 10.1007/s11882-023-01116-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2023] [Indexed: 11/24/2023]
Abstract
PURPOSE OF REVIEW To analyze and compare the effects of epistaxis treatments for Hereditary Hemorrhagic Telangiectasia (HHT) patients. RECENT FINDINGS Of total of 21 randomized controlled trials (RCT), the data from 15 RCTs (697 patients, 7 treatments: timolol, propranolol, bevacizumab, doxycycline, tacrolimus, estriol/estradiol, and tranexamic acid) were pooled for the meta-analyses while the other 6 studies (treatments: electrosurgical plasma coagulation, KTP laser, postoperative packing, tamoxifen, sclerosing agent, and estriol) were reviewed qualitatively. When compared to placebo, propranolol offered the most improved epistaxis severity score, mean difference (MD), -1.68, 95% confidence interval (95%CI) [-2.80, -0.56] followed by timolol, MD -0.40, 95%CI [-0.79, -0.02]. Tranexamic acid significantly reduced the epistaxis frequency, MD -1.93, 95%CI [-3.58, -0.28]. Other treatments had indifferent effects to placebo. Qualitative analysis highlighted the benefits of tamoxifen and estriol. The adverse events of tranexamic acid, tacrolimus, propranolol, and estradiol were significantly reported. Propranolol, timolol, tranexamic acid, tamoxifen, and estriol were effective treatments which offered benefits to HHT patients in epistaxis management. Adverse events of tranexamic acid, tacrolimus, propranolol, and estradiol should be concerned.
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Affiliation(s)
- Wirach Chitsuthipakorn
- Center of Excellence in Otolaryngology, Head & Neck Surgery, Rajavithi Hospital, Bangkok, Thailand
- College of Medicine, Rangsit University, Bangkok, Thailand
| | - Minh P Hoang
- Department of Otolaryngology, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Dichapong Kanjanawasee
- Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Center of Research Excellence in Allergy & Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kachorn Seresirikachorn
- Department of Otolaryngology, Faculty of Medicine, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
- Endoscopic Nasal and Sinus Surgery Excellence Center, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Kornkiat Snidvongs
- Department of Otolaryngology, Faculty of Medicine, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand.
- Endoscopic Nasal and Sinus Surgery Excellence Center, King Chulalongkorn Memorial Hospital, Bangkok, Thailand.
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Abstract
BACKGROUND Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant disease affecting 1 in 5000 individuals. Epistaxis is seen in more than 90% of patients with HHT. Severe recurrent epistaxis can significantly decrease quality of life and may be resistant to standard treatment measures. Dysregulation of angiogenesis has been shown to cause the proliferation of abnormal blood vessels. As such, antiangiogenic treatments have been investigated including beta-blockers. OBJECTIVE A systematic review of the efficacy of beta-blockers in topical treatment of epistaxis in patients with HHT based on epistaxis duration, frequency, and severity. METHODS A systematic search was performed using the PubMed, Embase via Ovid, and Cochrane databases. The Preferred Items for Systematic Reviews and Meta-Analyses guidelines were followed. Studies that measured the efficacy of beta-blocker treatment of epistaxis in patients with HHT were included for qualitative analysis. RESULTS Five studies (3 randomized controlled trials and 2 case series) with a total of 132 patients were included. Administration (systemically or topically via a spray or gel) of timolol and propranolol showed mixed evidence of improvement in epistaxis frequency, severity, and duration when compared with control groups. The evidence for propranolol appears more promising than timolol. CONCLUSION There are significant limitations in the included studies, and further investigation with larger longitudinal or randomized prospective trials is recommended. The available evidence suggests that beta-blocker treatment may have a positive effect on HHT-related epistaxis.
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Affiliation(s)
- Hashm Albarki
- Department of Otolaryngology Head & Neck Surgery, 2538Monash Health, Melbourne, Australia
| | - Joanne Rimmer
- Department of Otolaryngology Head & Neck Surgery, 2538Monash Health, Melbourne, Australia
- Department of Surgery, 2541Monash University, Melbourne, Australia
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Sârbu F, Oprea VD, Tatu AL, Polea Drima E, Bojincă VC, Romila A. Hereditary Hemorrhagic Telangiectasia Associating Neuropsychiatric Manifestations with a Significant Impact on Disease Management-Case Report and Literature Review. Life (Basel) 2022; 12:life12071059. [PMID: 35888148 PMCID: PMC9320563 DOI: 10.3390/life12071059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 11/28/2022]
Abstract
(1) Background: Genetic hereditary hemorrhagic telangiectasia (HHT) is clinically diagnosed. The clinical manifestations and lack of curative therapeutic interventions may lead to mental illnesses, mainly from the depression–anxiety spectrum. (2) Methods: We report the case of a 69-year-old patient diagnosed with HHT and associated psychiatric disorders; a comprehensive literature review was performed based on relevant keywords. (3) Results: Curaçao diagnostic criteria based the HHT diagnosis in our patient case at 63 years old around the surgical interventions for a basal cell carcinoma, after multiple episodes of epistaxis beginning in childhood, but with a long symptom-free period between 20 and 45 years of age. The anxiety–depressive disorder associated with nosocomephobia resulted in a delayed diagnosis and low adherence to medical monitoring. A comprehensive literature review revealed the scarcity of publications analyzing the impact of psychiatric disorders linked to this rare condition, frequently associating behavioral disengagement as a coping strategy, psychological distress, anxiety, depression, and hopelessness. (4) Conclusions: As patients with HHT face traumatic experiences from disease-related causes as well as recurring emergency hospital visits, active monitoring for mental illnesses and psychological support should be considered as part of the initial medical approach and throughout the continuum of care.
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Affiliation(s)
- Fabiola Sârbu
- Medical Department, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 800216 Galati, Romania; (F.S.); (E.P.D.); (A.R.)
- “Elisabeta Doamna” Psychiatric Hospital, 800179 Galati, Romania
| | - Violeta Diana Oprea
- Medical Department, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 800216 Galati, Romania; (F.S.); (E.P.D.); (A.R.)
- “St. Apostle Andrei” Clinical Emergency County Hospital Galati, 800578 Galati, Romania
- Correspondence: (V.D.O.); (A.L.T.)
| | - Alin Laurențiu Tatu
- Clinical, Medical Department, Dermatology, ReForm UDJ, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 800216 Galati, Romania
- Dermatology Department, Clinical Hospital of Infectious Diseases Saint Parascheva, 800179 Galati, Romania
- Correspondence: (V.D.O.); (A.L.T.)
| | - Eduard Polea Drima
- Medical Department, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 800216 Galati, Romania; (F.S.); (E.P.D.); (A.R.)
- “Elisabeta Doamna” Psychiatric Hospital, 800179 Galati, Romania
| | - Violeta Claudia Bojincă
- Internal Medicine Department, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy in Bucharest, 020021 Bucharest, Romania;
- Department of Internal Medicine and Rheumatology, “Sf. Maria” Hospital, 011172 Bucharest, Romania
| | - Aurelia Romila
- Medical Department, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 800216 Galati, Romania; (F.S.); (E.P.D.); (A.R.)
- “St. Apostle Andrei” Clinical Emergency County Hospital Galati, 800578 Galati, Romania
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Cuesta AM, Gallardo-Vara E, Casado-Vela J, Recio-Poveda L, Botella LM, Albiñana V. The Role of Propranolol as a Repurposed Drug in Rare Vascular Diseases. Int J Mol Sci 2022; 23:ijms23084217. [PMID: 35457036 PMCID: PMC9025921 DOI: 10.3390/ijms23084217] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/08/2022] [Accepted: 04/09/2022] [Indexed: 01/27/2023] Open
Abstract
Rare Diseases (RD) are defined by their prevalence in less than 5 in 10,000 of the general population. Considered individually, each RD may seem insignificant, but together they add up to more than 7000 different diseases. Research in RD is not attractive for pharmaceutical companies since it is unlikely to recover development costs for medicines aimed to small numbers of patients. Since most of these diseases are life threatening, this fact underscores the urgent need for treatments. Drug repurposing consists of identifying new uses for approved drugs outside the scope of the original medical indication. It is an alternative option in drug development and represents a viable and risk-managed strategy to develop for RDs. In 2008, the “off label” therapeutic benefits of propranolol were described in the benign tumor Infantile Hemangioma. Propranolol, initially prescribed for high blood pressure, irregular heart rate, essential tremor, and anxiety, has, in the last decade, shown increasing evidence of its antiangiogenic, pro-apoptotic, vasoconstrictor and anti-inflammatory properties in different RDs, including vascular or oncological pathologies. This review highlights the finished and ongoing trials in which propranolol has arisen as a good repurposing drug for improving the health condition in RDs.
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Affiliation(s)
- Angel M. Cuesta
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain;
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Unidad 707, 28029 Madrid, Spain;
| | - Eunate Gallardo-Vara
- Yale Cardiovascular Research Center, Department of Internal Medicine, Yale University School of Medicine, 300 George Street, New Haven, CT 06511, USA;
| | - Juan Casado-Vela
- Facultad de Ciencias Experimentales, Universidad Francisco de Vitoria, Pozuelo, 28223 Madrid, Spain;
- Departamento de Bioingeniería, Escuela Politécnica Superior, Universidad Carlos III de Madrid, Av. de la Universidad, 30, 28911 Madrid, Spain
| | - Lucía Recio-Poveda
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Unidad 707, 28029 Madrid, Spain;
- Centro de Investigaciones Biológicas Margaritas Salas, 28040 Madrid, Spain
| | - Luisa-María Botella
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Unidad 707, 28029 Madrid, Spain;
- Centro de Investigaciones Biológicas Margaritas Salas, 28040 Madrid, Spain
- Correspondence: (L.-M.B.); (V.A.)
| | - Virginia Albiñana
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Unidad 707, 28029 Madrid, Spain;
- Centro de Investigaciones Biológicas Margaritas Salas, 28040 Madrid, Spain
- Correspondence: (L.-M.B.); (V.A.)
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Hayama M, Maeda Y, Shikina T, Tatehara S, Inokuchi G, Hoag JB, Sato T, Obata S, Nakatani A, Amano Y, Hida E, Nibu KI, Inohara H. Validation of epistaxis severity score for hereditary hemorrhagic telangiectasia in Japan. Auris Nasus Larynx 2021; 49:415-420. [PMID: 34857410 DOI: 10.1016/j.anl.2021.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/21/2021] [Accepted: 11/10/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE This study aimed to assess the health-related QoL (HR-QoL) of patients with hereditary hemorrhagic telangiectasia (HHT), with emphasis on the role/social aspects, and validate the Japanese version of the epistaxis severity score (ESS) in these patients. METHODS The Japanese version of the ESS was created through forward and reverse translation, and consultation with the original author. A validation analysis was performed by comparing ESS severity with the invasiveness of previous treatments for epistaxis and assessing the correlation between the ESS and HR-QoL. Medical history forms, ESS questionnaires, and the Medical Outcomes Study Short Form 36 (SF-36) were distributed to participants with HHT in August 2020. The relation between the ESS and summary scores of SF-36 was assessed by performing analysis of variance and Spearman's correlation. RESULTS In total, 73 participants were included in this study. The average ESS was 5.02; there were mild (32.9%), moderate (45.2%), and severe (21.9%) epistaxis groups. Patients with higher ESS received a significantly more invasive treatment (Fisher's exact test, p < 0.05). The ESS was also negatively correlated with the physical component score (PCS) (r = -0.489, p < 0.001). Comorbid liver and gastrointestinal arteriovenous malformations significantly reduced the PCS (p < 0.05). Multiple regression analysis revealed that the ESS was a significant variable (p < 0.01). The role/social component score was significantly lower in the severe ESS group than in the mild or moderate group. CONCLUSION The Japanese version of the ESS was considered valid and may be useful as an outcome measure of future HHT-associated epistaxis trials in Japan.
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Affiliation(s)
- Masaki Hayama
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan.
| | - Yohei Maeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | | | - Shun Tatehara
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Go Inokuchi
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Jeffrey B Hoag
- Department of Pulmonary, Allergy and Critical Care Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, U.S.A
| | - Tomoharu Sato
- Department of Biostatistics and Data Science, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Sho Obata
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Ayaka Nakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Yuta Amano
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Eisuke Hida
- Department of Biostatistics and Data Science, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Ken-Ichi Nibu
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
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Snodgrass RO, Chico TJA, Arthur HM. Hereditary Haemorrhagic Telangiectasia, an Inherited Vascular Disorder in Need of Improved Evidence-Based Pharmaceutical Interventions. Genes (Basel) 2021; 12:174. [PMID: 33513792 PMCID: PMC7911152 DOI: 10.3390/genes12020174] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/11/2021] [Accepted: 01/20/2021] [Indexed: 12/15/2022] Open
Abstract
Hereditary haemorrhagic telangiectasia (HHT) is characterised by arteriovenous malformations (AVMs). These vascular abnormalities form when arteries and veins directly connect, bypassing the local capillary system. Large AVMs may occur in the lungs, liver and brain, increasing the risk of morbidity and mortality. Smaller AVMs, known as telangiectases, are prevalent on the skin and mucosal lining of the nose, mouth and gastrointestinal tract and are prone to haemorrhage. HHT is primarily associated with a reduction in endoglin (ENG) or ACVRL1 activity due to loss-of-function mutations. ENG and ACVRL1 transmembrane receptors are expressed on endothelial cells (ECs) and bind to circulating ligands BMP9 and BMP10 with high affinity. Ligand binding to the receptor complex leads to activation of the SMAD1/5/8 signalling pathway to regulate downstream gene expression. Various genetic animal models demonstrate that disruption of this pathway in ECs results in AVMs. The vascular abnormalities underlying AVM formation result from abnormal EC responses to angiogenic and haemodynamic cues, and include increased proliferation, reduced migration against the direction of blood flow and an increased EC footprint. There is growing evidence that targeting VEGF signalling has beneficial outcomes in HHT patients and in animal models of this disease. The anti-VEGF inhibitor bevacizumab reduces epistaxis and has a normalising effect on high cardiac output in HHT patients with hepatic AVMs. Blocking VEGF signalling also reduces vascular malformations in mouse models of HHT1 and HHT2. However, VEGF signalling is complex and drives numerous downstream pathways, and it is not yet clear which pathway (or combination of pathways) is critical to target. This review will consider the recent evidence gained from HHT clinical and preclinical studies that are increasing our understanding of HHT pathobiology and informing therapeutic strategies.
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Affiliation(s)
- Ryan O. Snodgrass
- Department of Infection, Immunity & Cardiovascular Disease, Medical School, University of Sheffield, Sheffield S10 2RX, UK; (R.O.S.); (T.J.A.C.)
| | - Timothy J. A. Chico
- Department of Infection, Immunity & Cardiovascular Disease, Medical School, University of Sheffield, Sheffield S10 2RX, UK; (R.O.S.); (T.J.A.C.)
| | - Helen M. Arthur
- Biosciences Institute, Centre for Life, Newcastle University, Newcastle NE1 3BZ, UK
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