PMID- 29996870 OWN - NLM STAT- MEDLINE DCOM- 20190318 LR - 20190318 IS - 1750-1172 (Electronic) IS - 1750-1172 (Linking) VI - 13 IP - 1 DP - 2018 Jul 11 TI - Alpha-1 antitrypsin deficiency: outstanding questions and future directions. PG - 114 LID - 10.1186/s13023-018-0856-9 [doi] LID - 114 AB - BACKGROUND: Alpha-1 antitrypsin deficiency (AATD) is a rare hereditary condition that leads to decreased circulating alpha-1 antitrypsin (AAT) levels, significantly increasing the risk of serious lung and/or liver disease in children and adults, in which some aspects remain unresolved. METHODS: In this review, we summarise and update current knowledge on alpha-1 antitrypsin deficiency in order to identify and discuss areas of controversy and formulate questions that need further research. RESULTS: 1) AATD is a highly underdiagnosed condition. Over 120,000 European individuals are estimated to have severe AATD and more than 90% of them are underdiagnosed. CONCLUSIONS: 2) Several clinical and etiological aspects of the disease are yet to be resolved. New strategies for early detection and biomarkers for patient outcome prediction are needed to reduce morbidity and mortality in these patients; 3) Augmentation therapy is the only specific approved therapy that has shown clinical efficacy in delaying the progression of emphysema. Regrettably, some countries reject registration and reimbursement for this treatment because of the lack of larger randomised, placebo-controlled trials. 4) Alternative strategies are currently being investigated, including the use of gene therapy or induced pluripotent stem cells, and non-augmentation strategies to prevent AAT polymerisation inside hepatocytes. FAU - Torres-Duran, Maria AU - Torres-Duran M AD - Pulmonary Department, Hospital Alvaro Cunqueiro EOXI, Vigo, Spain. AD - NeumoVigo I+i Research Group, IIS Galicia Sur, Vigo, Spain. FAU - Lopez-Campos, Jose Luis AU - Lopez-Campos JL AD - Unidad Medico-Quirurgica de Enfermedades Respiratorias, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocio, Universidad de Sevilla, Sevilla, Spain. AD - CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain. FAU - Barrecheguren, Miriam AU - Barrecheguren M AD - CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain. AD - Pneumology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain. FAU - Miravitlles, Marc AU - Miravitlles M AD - CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain. AD - Pneumology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain. FAU - Martinez-Delgado, Beatriz AU - Martinez-Delgado B AD - Molecular Genetics Unit, Instituto de Investigacion de Enfermedades Raras (IIER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain. FAU - Castillo, Silvia AU - Castillo S AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Escribano, Amparo AU - Escribano A AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Paediatrics, Obstetrics and Gynaecology, University of Valencia, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Baloira, Adolfo AU - Baloira A AD - Pneumology Department, Complejo Hospitalario Universitario de Pontevedra, Pontevedra, Spain. FAU - Navarro-Garcia, Maria Mercedes AU - Navarro-Garcia MM AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Pellicer, Daniel AU - Pellicer D AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Banuls, Lucia AU - Banuls L AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Magallon, Maria AU - Magallon M AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. FAU - Casas, Francisco AU - Casas F AD - Pneumology Department, Hospital Universitario San Cecilio, Granada, Spain. FAU - Dasi, Francisco AU - Dasi F AUID- ORCID: 0000-0003-2938-2965 AD - Fundacion Investigacion Hospital Clinico Valencia, Instituto de Investigacion Sanitaria INCLIVA, c/Menendez y Pelayo, 4, 46010, Valencia, Spain. Francisco.Dasi@uv.es. AD - School of Medicine, Department of Physiology, Research group on Rare Respiratory Diseases (ERR), University of Valencia, Valencia, Spain. Francisco.Dasi@uv.es. LA - eng GR - PI17/01250/Instituto de Salud Carlos III/International GR - 201/2013/Sociedad Espanola de Neumologia y Cirugia Toracica/International PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20180711 PL - England TA - Orphanet J Rare Dis JT - Orphanet journal of rare diseases JID - 101266602 RN - 0 (alpha 1-Antitrypsin) SB - IM MH - Animals MH - Fibrosis/metabolism/pathology MH - Humans MH - Panniculitis/metabolism/pathology MH - Pulmonary Disease, Chronic Obstructive/metabolism/pathology MH - Vasculitis/metabolism/pathology MH - alpha 1-Antitrypsin/*metabolism MH - alpha 1-Antitrypsin Deficiency/*metabolism/*pathology PMC - PMC6042212 OTO - NOTNLM OT - Alpha-1 antitrypsin OT - Alpha-1 antitrypsin deficiency OT - Augmentation therapy OT - COPD OT - Cirrhosis OT - Panniculitis OT - Rare respiratory diseases OT - SERPINA1 OT - Vasculitis COIS- ETHICS APPROVAL AND CONSENT TO PARTICIPATE: Not applicable. CONSENT FOR PUBLICATION: Not applicable. COMPETING INTERESTS: Drs. Maria Torres-Duran, Silvia Castillo, Amparo Escribano, Maria Mercedes Navarro Garcia, Daniel Pellicer, Lucia Banuls, Francisco Casas and Francisco Dasi report no disclosures. Dr. Jose Luis Lopez-Campos reports personal fees and non-financial support from Grifols, during the conduct of the study. Dr. Miriam Barrecheguren reports personal fees from Menarini, personal fees from GlaxoSmithKline, personal fees from Gebro pharme, personal fees from Novartis, personal fees from Grifols, outside the submitted work. Dr. Miravitlles reports personal fees from Boehringer Ingelheim, AstraZeneca, Chiesi, GlaxoSmithKline, Menarini, Teva, Grifols and Novartis, personal fees from Bayer Schering, Boehringer Ingelheim, GlaxoSmithKline, Gebro Pharma, CLS Behring, Cipla, MediImmune, Mereo Biopharma, Teva, Novartis and Grifols, outside the submitted work. Dr. Martinez-Delgado reports grants from Ministerio de Economia y Competitividad. ISCIII. (Spain), other from Registro Espanol de pacientes con Deficit de alfa-1 antitripsina (REDAAT). Fundacion Espanola de Pulmon, during the conduct of the study. Dr. Baloira reports personal fees and non-financial support from GRIFOLS during the conduct of the study. PUBLISHER'S NOTE: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. EDAT- 2018/07/13 06:00 MHDA- 2019/03/19 06:00 PMCR- 2018/07/11 CRDT- 2018/07/13 06:00 PHST- 2018/02/05 00:00 [received] PHST- 2018/06/26 00:00 [accepted] PHST- 2018/07/13 06:00 [entrez] PHST- 2018/07/13 06:00 [pubmed] PHST- 2019/03/19 06:00 [medline] PHST- 2018/07/11 00:00 [pmc-release] AID - 10.1186/s13023-018-0856-9 [pii] AID - 856 [pii] AID - 10.1186/s13023-018-0856-9 [doi] PST - epublish SO - Orphanet J Rare Dis. 2018 Jul 11;13(1):114. doi: 10.1186/s13023-018-0856-9.