{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T00:40:31Z","timestamp":1775263231167,"version":"3.50.1"},"reference-count":23,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2017,11,21]],"date-time":"2017-11-21T00:00:00Z","timestamp":1511222400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"International Science Program, Uppsala University, Sweden","award":["ETH:02"],"award-info":[{"award-number":["ETH:02"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Malaria is one of the world\u2019s most severe endemic diseases and due to the emergence of resistance to the currently available medicines, the need for new targets and relevant antimalarial drugs remains acute. The crude extract, four solvent fractions and two isolated compounds from the roots of Echinops hoehnelii were tested for their antimalarial activity using the standard four-day suppressive method in Plasmodium berghei-infected mice. The 80% methanol extract exhibited suppression of 4.6%, 27.8%, 68.5% and 78.7% at dose of 50, 100, 200 and 400 mg\/kg respectively. The dichloromethane fraction displayed chemosuppression of 24.9, 33.5 and 43.0% dose of 100, 200 and 400 mg\/kg of body weight. Five acetylenicthiophenes were isolated from the dichloromethane fraction of which 5-(penta-1,3-diynyl)-2-(3,4-dihydroxybut-1-ynyl)-thiophene decreased the level of parasitaemia by 43.2% and 50.2% while 5-(penta-1,3-diynyl)-2-(3-chloro-4-acetoxy-but-1-yn)-thiophene suppressed by 18.8% and 32.7% at 50 and 100 mg\/kg, respectively. The study confirmed the traditional claim of the plant to treat malaria and could be used as a new lead for the development of antimalarial drugs.<\/jats:p>","DOI":"10.3390\/molecules22111965","type":"journal-article","created":{"date-parts":[[2017,11,21]],"date-time":"2017-11-21T11:23:20Z","timestamp":1511263400000},"page":"1965","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Antimalarial Activity of Acetylenic Thiophenes from Echinops hoehnelii Schweinf"],"prefix":"10.3390","volume":"22","author":[{"given":"Helen","family":"Bitew","sequence":"first","affiliation":[{"name":"Department of Pharmaceutical Chemistry and Pharmacognosy, School of pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa P.O. Box 9086, Ethiopia"},{"name":"DDepartment of Pharmacognosy, School of Pharmacy, College of Health Sciences, Mekelle University, P.O.Box 1871, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wendimagegn","family":"Mammo","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa P.O. Box 1176, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ariaya","family":"Hymete","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Chemistry and Pharmacognosy, School of pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa P.O. Box 9086, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mariamawit","family":"Yeshak","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Chemistry and Pharmacognosy, School of pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa P.O. Box 9086, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,11,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/j.neurol.2012.01.582","article-title":"Cerebral malaria: What is known and what is on research","volume":"168","author":"Gay","year":"2012","journal-title":"Rev. Neurol."},{"key":"ref_2","unstructured":"World Health Organization (WHO) (2015, January 21). World Malaria Report. Available online: http:\/\/www.who.int\/malaria\/publications\/world_malaria_report_2014\/en\/."},{"key":"ref_3","unstructured":"World Health Organization (WHO) (2016, June 08). 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