PMID- 38543146 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240330 IS - 1424-8247 (Print) IS - 1424-8247 (Electronic) IS - 1424-8247 (Linking) VI - 17 IP - 3 DP - 2024 Mar 10 TI - Five-Membered Nitrogen Heterocycles Angiotensin-Converting Enzyme (ACE) Inhibitors Induced Angioedema: An Underdiagnosed Condition. LID - 10.3390/ph17030360 [doi] LID - 360 AB - Angiotensin-converting enzyme (ACE) inhibitors are used primarily in the treatment of hypertension, heart failure, and in the acute phase of myocardial infarction. Lisinopril [N(2)-[(1S)-1-car-boxy-3-phenylpropyl]-L-lysyl-L-proline], enalapril [(S)-1-[N-[1-(ethoxycarbonyl)-3-phenylpropyl]-L-alanyl]-L-proline] and ramipril [2-aza-bicyclo-[3.3.0]-octane-3-carboxylic acid] are all five-membered heterocycles and three of the most prevalent ACE inhibitors in clinical use worldwide. ACE inhibitor-induced angioedema (AE) is clinically characterized by self-limited edema of the dermis and subcutaneous lipid tissue, localized on face skin, oral mucosa and tongue in most cases. However, severe episodes of intestinal AE misdiagnosed as acute appendicitis and laryngeal AE requiring incubation have been reported. The pathophysiology of ACE inhibitor-induced angioedema is attributed to the accumulation of bradykinin, which is a potent vasodilator with proinflammatory activity that is normally degraded by angiotensin-converting enzyme (ACE) and aminopeptidase P; however, a small proportion of treated patients is affected. Given that patients do not respond to anti-H1 antihistamines and steroids, early clinical recognition and discontinuation of the ACE inhibitors are the treatments of choice for the long-term management of ACE inhibitor- induced angioedema. The search period of the present review was set up until November 2023, and its aim is to shed light on the broader context of ACE inhibitor-induced angioedema, exploring aspects such as clinical presentation, pathophysiology, and therapeutic considerations in this potentially life-threatening condition. The exploration of alternative drug options such as angiotensin II receptor blockers, the potential association of coadministration of DPP-4 inhibitors with ACE inhibitors, the presentation of angioedema and the significant clinical importance of this condition are also discussed. By focusing on the chemical structure of ACE inhibitors, specifically their nitrogen-based heterocycles-an attribute shared by over 880 drugs approved by the FDA within the pharmaceutical industry-this review emphasizes the pivotal role of nitrogen scaffolds in drug design and underscores their relevance in ACE inhibitor pharmacology. FAU - Papapostolou, Niki AU - Papapostolou N AUID- ORCID: 0000-0003-3950-3089 AD - Allergy Unit, 2nd Department of Dermatology and Venereology, National and Kapodistrian University of Athens, University General Hospital 'Attikon', 12462 Athens, Greece. FAU - Gregoriou, Stamatios AU - Gregoriou S AUID- ORCID: 0000-0002-7585-1032 AD - 1st Department of Dermatology and Venereology, "Andreas Syggros" Hospital for Skin and Venereal Diseases, National and Kapodistrian University of Athens, 16121 Athens, Greece. FAU - Katoulis, Alexander AU - Katoulis A AUID- ORCID: 0000-0001-8189-7486 AD - Allergy Unit, 2nd Department of Dermatology and Venereology, National and Kapodistrian University of Athens, University General Hospital 'Attikon', 12462 Athens, Greece. FAU - Makris, Michael AU - Makris M AUID- ORCID: 0000-0003-2713-2380 AD - Allergy Unit, 2nd Department of Dermatology and Venereology, National and Kapodistrian University of Athens, University General Hospital 'Attikon', 12462 Athens, Greece. LA - eng PT - Journal Article PT - Review DEP - 20240310 PL - Switzerland TA - Pharmaceuticals (Basel) JT - Pharmaceuticals (Basel, Switzerland) JID - 101238453 PMC - PMC10974338 OTO - NOTNLM OT - angioedema OT - angiotensin-converting enzyme (ACE) inhibitors OT - bradykinin OT - nitrogen-based heterocycles OT - pharmacology COIS- The authors declare no conflict of interest. EDAT- 2024/03/28 06:45 MHDA- 2024/03/28 06:46 PMCR- 2024/03/10 CRDT- 2024/03/28 01:23 PHST- 2024/01/31 00:00 [received] PHST- 2024/03/04 00:00 [revised] PHST- 2024/03/08 00:00 [accepted] PHST- 2024/03/28 06:46 [medline] PHST- 2024/03/28 06:45 [pubmed] PHST- 2024/03/28 01:23 [entrez] PHST- 2024/03/10 00:00 [pmc-release] AID - ph17030360 [pii] AID - pharmaceuticals-17-00360 [pii] AID - 10.3390/ph17030360 [doi] PST - epublish SO - Pharmaceuticals (Basel). 2024 Mar 10;17(3):360. doi: 10.3390/ph17030360.