{"id":49699,"date":"2020-08-04T05:38:43","date_gmt":"2020-08-04T03:38:43","guid":{"rendered":"https:\/\/www.greatitalianfoodtrade.it\/?p=49699"},"modified":"2025-10-23T11:26:42","modified_gmt":"2025-10-23T09:26:42","slug":"le-microalghe-per-contrastare-covid-19-studi-promettenti","status":"publish","type":"post","link":"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/","title":{"rendered":"Le microalghe per contrastare Covid-19, studi promettenti"},"content":{"rendered":"<p>Recenti studi hanno consentito di individuare nelle\u00a0microalghe\u00a0marine una serie di composti bioattivi con possibile azione anti-virale, nei confronti di\u00a0Covid-19\u00a0come di altri virus. (1)<\/p>\n<p>Alghe, microalghe e cianobatteri raccolgono crescenti attenzioni della comunit\u00e0 scientifica. Con diverse prospettive di sviluppo di medicinali e farmaci veterinari, oltrech\u00e9 di alimenti e mangimi.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#Alghe_microalghe_cianobatteri_e_salute\" >Alghe, microalghe, cianobatteri e salute<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#Spirulina_attivita_biologiche\" >Spirulina, attivit\u00e0 biologiche<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#SARS-CoV-2_inibizione_in_vitro_da_parte_dellalga_Kombu\" >SARS-CoV-2, inibizione\u00a0in vitro\u00a0da parte dell\u2019alga Kombu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#Azioni_antivirali_delle_alghe\" >Azioni antivirali delle alghe<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#La_meta-analisi\" >La meta-analisi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#Azioni_antivirali_delle_alghe_in_zootecnia_e_acquacoltura\" >Azioni antivirali delle alghe in\u00a0zootecnia\u00a0e\u00a0acquacoltura<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.foodtimes.eu\/it\/consumatori-e-salute\/le-microalghe-per-contrastare-covid-19-studi-promettenti\/#Orizzonti_di_ricerca\" >Orizzonti di ricerca<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Alghe_microalghe_cianobatteri_e_salute\"><\/span>Alghe, microalghe, cianobatteri e salute<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Le alghe<\/strong>\u00a0vengono classificate in rosse (rodofite), brune (feofite) e verdi (clorofite). Diversi studi gi\u00e0 mostrano la loro attivit\u00e0 anti-virale. La gran parte delle ricerche \u00e8 stata finora rivolta all\u2019interazione di alcune di esse con i virus HSV e HIV. (2) In tempi pi\u00f9 recenti la ricerca \u00e8 stata estesa al loro possibile ruolo rispetto ai virus influenzali (3) e, da ultimo, a Covid-19.<\/p>\n<p><strong>Microalghe<\/strong><strong>\u00a0e cianobatteri\u00a0<\/strong>(batteri fotosintetici, o alghe azzurre) a loro volta sono in grado di produrre polisaccaridi solforati e altri composti con importanti attivit\u00e0 biologiche.<\/p>\n<p><strong>Sono state osservate<\/strong>\u00a0in particolare le possibili azioni anticarcinogenica, anti-microbica, immunomodulatoria, anti-diabetica, anti-tubercolare, anti-epilettica, anti-ipertensiva, anti-aterosclerotica, anti-osteoporosi, anti-infiammatoria e infine anti-virale. (4)<\/p>\n<p><strong>Le ricerche<\/strong>\u00a0in questi ambiti appaiono meritevoli di approfondimento in ragione delle propriet\u00e0 specifiche rilevate nei vari organismi. I quali potrebbero rivelarsi candidati ideali anche per la produzione industriale di composti ad azione antivirale, grazie alla relativa semplicit\u00e0 della coltivazione su larga scala. (5)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Spirulina_attivita_biologiche\"><\/span>Spirulina, attivit\u00e0 biologiche<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>La\u00a0spirulina<\/strong>\u00a0(<em>Arthrospira platensis<\/em>) \u00e8 un cianobatterio capace di realizzare la fotosintesi, al pari delle alghe. Pu\u00f2 venire coltivata in acque dolci e salate, grazie alla sua grande capacit\u00e0 di adattamento. Ed \u00e8 in grado di produrre numerosi composti bioattivi ad azione antifungina, antibatterica ed antivirale. (6)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49725 size-full\" src=\"http:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-1.jpg\" alt=\"\" width=\"589\" height=\"655\" srcset=\"https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-1.jpg 589w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-1-270x300.jpg 270w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-1-150x167.jpg 150w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-1-300x334.jpg 300w\" sizes=\"auto, (max-width: 589px) 100vw, 589px\" \/><\/p>\n<p><em><strong>Fig. 1<\/strong>. Schema di estrazione e purificazione dei polisaccaridi algali e possibili applicazioni<\/em>\u00a0<em>(Xu et al., 2017)<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"SARS-CoV-2_inibizione_in_vitro_da_parte_dellalga_Kombu\"><\/span>SARS-CoV-2, inibizione\u00a0<em>in vitro<\/em>\u00a0da parte dell\u2019alga Kombu<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Kombu<\/strong>\u00a0(<em>Saccharina japonica<\/em>) \u00e8 un\u2019alga bruna tradizionalmente impiegata nella cucina orientale (quella giapponese soprattutto). Da essa sono stati estratti polisaccaridi solforati che hanno dimostrato,\u00a0<em>in vitro<\/em>,\u00a0una notevole capacit\u00e0 di inibire il virus SARS-CoV-2.<\/p>\n<p><strong>A confronto<\/strong>\u00a0con il Remdesivir, un farmaco antivirale, gli estratti dell\u2019alga Kombu risultano essere pi\u00f9 sicuri sotto entrambi i profili delle modalit\u00e0 d\u2019assunzione (orale\/nasale vs intravenosa) e dell\u2019assenza di controindicazioni, alle dosi testate. (7)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Azioni_antivirali_delle_alghe\"><\/span>Azioni antivirali delle alghe<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Le infezioni virali<\/strong>\u00a0si sviluppano generalmente in tre fasi:<\/p>\n<p>1) adesione del virus, adsorbimento, ingresso e invasione della cellula,<\/p>\n<p>2) replicazione del virus,<\/p>\n<p>3) maturit\u00e0 e rilascio di particelle virali. (8)<\/p>\n<p><strong>I gruppi solforati<\/strong>\u00a0presenti nelle alghe sembrano essere l\u2019agente responsabile di azioni antivirali specifiche. In particolar modo nella fase 3, ipoteticamente anche nella fase 1. La comprensione di questi meccanismi \u00e8 alla base della prospettiva di produrre formulati specifici ad azione antivirale. (9)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"La_meta-analisi\"><\/span>La meta-analisi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Una meta-analisi<\/strong>\u00a0delle ricerche scientifiche pubblicate negli ultimi 10 anni mostra le attivit\u00e0 di alcune specie di alghe nei confronti dei virus di herpes, immunodeficienza acquisita e influenza:<\/p>\n<p><strong>&#8211; HSV\u00a0<\/strong>(<em>herpes simplex virus<\/em>).\u00a0<em>Porphiridium cruentum,\u00a0Dunaliella salina, Haslea Karadagensis, Sargassum naozhouense, Schizymenia binderi, Cystoseira indica,<\/em><\/p>\n<p><strong>&#8211; HIV<\/strong>\u00a0(<em>human immunodeficiency virus<\/em>).\u00a0<em>Arthrospira platensis, Agardhiella tenera, Dictyota mertensii, Lobophora variegata, Fucus vesiculosus, Spatoglossum schroederi,<\/em><\/p>\n<p><strong>&#8211; virus influenzali<\/strong>.\u00a0<em>Gyrodinium impudicum, Nanofrustum shiloi, Eckolina cava, Sargassum pluriferum.<\/em>\u00a0(10)<\/p>\n<p><strong>Il Griffithsin<\/strong>\u00a0(da\u00a0<em>Griffithsia sp<\/em>.), l\u2019unica sostanza finora sottoposta a studi clinici sperimentali, viene attualmente studiato per contrastare l\u2019HIV, grazie alla sua capacit\u00e0 di formare legami con il virus e alla sua bassa tossicit\u00e0. (11)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49717\" src=\"http:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-2.jpg\" alt=\"\" width=\"732\" height=\"429\" srcset=\"https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-2.jpg 732w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-2-300x176.jpg 300w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-2-150x88.jpg 150w, https:\/\/www.foodtimes.eu\/wp-content\/uploads\/2020\/08\/immagine-2-696x408.jpg 696w\" sizes=\"auto, (max-width: 732px) 100vw, 732px\" \/><\/p>\n<p><em><strong>Fig. 2<\/strong>. Meccanismo d\u2019ingresso dei virus e di azione antivirale dei polisaccaridi di origine algale (Shi et al., 2017)<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Azioni_antivirali_delle_alghe_in_zootecnia_e_acquacoltura\"><\/span>Azioni antivirali delle alghe in\u00a0zootecnia\u00a0e\u00a0acquacoltura<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Le azioni antivirali<\/strong>\u00a0delle alghe sono state sperimentate con successo anche in acquacoltura e avicoltura. Come efficaci alternative all\u2019impiego di vaccini e soprattutto di antibiotici, il cui abuso (in zootecnia e in medicina) \u00e8 causa di antibiotico-resistenza. La quale \u00e8 a sua volta indicata da OMS (2019) come una delle pi\u00f9 gravi minacce per la salute pubblica a livello planetario.<\/p>\n<p><strong>Gli studi sperimentali<\/strong>\u00a0hanno mostrato in particolare l\u2019efficacia di:<\/p>\n<p>&#8211; <em>Graciliaria chilensis<\/em>\u00a0nella lotta al virus dell\u2019anemia dei salmoni, causa di elevata mortalit\u00e0 per la specie e trasmissibile nell\u2019ambiente, (12)<\/p>\n<p>&#8211; polisaccaridi solforati da\u00a0<em>Ulva\u00a0sp.<\/em> e\u00a0<em>Eteromorpha\u00a0sp<\/em>. nel contrasto delle infezioni virali dei gamberi, ivi compreso il virus della sindrome delle macchie bianche, fortemente epidemico e letale. Grazie allo stimolo del sistema immunitario dei crostacei, (13)<\/p>\n<p>&#8211; polisaccaridi solforati di\u00a0<em>Ulva clathrata<\/em>\u00a0e di\u00a0<em>Cladosiphon okamuranus<\/em>, azione antivirale nelle specie avicole, pollame soprattutto, nei confronti del virus della malattia di Newcastle (causa di sindrome respiratoria acuta. 14)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Orizzonti_di_ricerca\"><\/span>Orizzonti di ricerca<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>I polisaccaridi solforati<\/strong>\u00a0&#8211; numerosi e differenti composti naturalmente contenuti nelle alghe &#8211; mostrano un potenziale interessante nella lotta al nuovo coronavirus e ad altri virus che colpiscono l\u2019uomo e gli animali da reddito.<\/p>\n<p><strong>I composti fenolici<\/strong>\u00a0&#8211; tra cui i florotannini, prodotti dalle alghe marine brune (15) &#8211; a loro volta si distinguono per una potente azione antiossidante. La quale rileva, tra l\u2019altro, per lo stimolo del sistema immunitario e l\u2019attivit\u00e0 antivirale. (16)<\/p>\n<p><em>Dario Dongo e Andrea Adelmo Della Penna<\/em><\/p>\n<p><strong>Note<\/strong><\/p>\n<p>(1) Liu et al. (2020).\u00a0<em><a href=\"https:\/\/doi.org\/10.1021\/acscentsci.0c00272\">Research and development on therapeutic agents and vaccines for COVID-19 and related human Coronavirus diseases<\/a>.<\/em>\u00a0ACS Cent. Sci. 6:315-331,<br \/>\n(2) Mattos et al. (2011).\u00a0<em><a href=\"http:\/\/dx.doi.org\/10.1590\/S0102-695X2011005000056\">Glycolipids from macroalgae: Potential biomolecules for marine biotechnology?<\/a>\u00a0<\/em>Brazilian J. Pharmacogn. 12:244-247,<br \/>\n(3) Song et al. (2016).\u00a0<em>Characterization and comparison of the structural features, immune-modulatory and anti-avian influenza virus activities conferred by the three algal sulfated polysaccharides.\u00a0<\/em>Mar. Drugs 14:4, doi:10.3390\/md14010004<br \/>\n(4) Ngo et al. (2013).\u00a0<a href=\"https:\/\/doi.org\/10.1016\/j.ijbiomac.2013.08.036\"><em>Sulfated polysaccharides as bioactive agents from marine algae<\/em><\/a>.\u00a0Int. J. Biol. Macromol. 62:70-75,<br \/>\n(5) Khan et al. (2018).\u00a0<em>The promising future of microalgae: Current status, challenges, and optimization of a sustainable and renewable industry for biofuels, feed, and other products.<\/em>\u00a0Microb. Cell Factories 17:36, doi:10.1186\/s12934-018-0879-x<br \/>\n(6) Raposo et al. (2013).\u00a0<em>Bioactivity and applications of sulphated polysaccharides from marine microalgae<\/em>.\u00a0Mar. Drugs 11:233-252, doi:10.3390\/md11010233<br \/>\n(7) Kwon et al. (2020).\u00a0<em><a href=\"https:\/\/doi.org\/10.1038\/s41421-020-00192-8\">Sulfated polysaccharides effectively inhibit SARS-CoV-2 in vitro<\/a><\/em>. Cell Discovery 6:50,<br \/>\n(8) San Martin (2019).\u00a0<a href=\"https:\/\/doi.org\/10.1007\/978-3-030-14741-9\"><em>Virus maturation \u2013 in Physical Virology (Virus structure and mechanics)<\/em><\/a>.\u00a0Ed. Springer 7:129-158,<br \/>\n(9) Cunha et al. (2016).\u00a0<em>Sulfated polysaccharides as multifunctional materials in drug delivery applications.<\/em>\u00a0Mar. Drugs 14:42, doi:10.3390\/md14030042<br \/>\n(10) Riccio et al. (2020).\u00a0<a href=\"https:\/\/doi.org\/10.3390\/biom10071007\"><em>Ten-year research update review: Antiviral activities from marine organisms.<\/em><\/a>\u00a0Biomolecules 10:1007,<br \/>\n(11) Lee (2019).\u00a0<a href=\"https:\/\/doi.org\/10.3390\/md17100567\"><em>Griffithsin, a highly potent broad-spectrum antiviral lectin from red algae: from discovery to clinical application<\/em><\/a>.\u00a0Mar. Drugs 17:567,<br \/>\n(12) Lozano et al. (2016).\u00a0<em>Red macroalgae Pyropia columbina and Gracilaria chilensis: Sustainable feed additive in the Salmo salar diet and the evaluation of potential antiviral activity against infectious salmon anemia virus.<\/em>\u00a0J. Appl. Phycol. 28:1343-1351, doi:10.1007\/s10811-015-0648-8<br \/>\n(13) Declarador et al. (2014).\u00a0<em>Ulvan extract acts as immunostimulant against white spot syndrome virus (WSSV) in juvenile black tiger shrimp Penaeus monodon.<\/em>\u00a0AACL Bioflux 7:153-161<br \/>\n(14) Aguilar-Brise\u00f1o et al. (2015).\u00a0<em>Sulphated polysaccharides from Ulva clathrata and Cladosiphon okamuranus seaweeds both inhibit viral attachment\/entry and cell-cell fusion, in NDV infection.<\/em>\u00a0Mar. Drugs 13:697-712, doi:10.3390\/md13020697<br \/>\n(15) Sansone et al. (2020).\u00a0<em>Marine algal antioxidants as potential vectors for controlling viral diseases.\u00a0<\/em>Antioxidants 9:392, doi:10.3390\/antiox9050392<br \/>\n(16) Dario Dongo, Andrea Adelmo Della Penna (2020).\u00a0<em>Polifenoli e salute. I vegetali amici del sistema immunitario<\/em>.\u00a0GIFT (<em>Great Italian Food Trade<\/em>).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recenti studi hanno consentito di individuare nelle\u00a0microalghe\u00a0marine una serie di composti bioattivi con possibile azione anti-virale, nei confronti di\u00a0Covid-19\u00a0come di altri virus. (1) Alghe, microalghe e cianobatteri raccolgono crescenti attenzioni della comunit\u00e0 scientifica. Con diverse prospettive di sviluppo di medicinali e farmaci veterinari, oltrech\u00e9 di alimenti e mangimi. Alghe, microalghe, cianobatteri e salute Le alghe\u00a0vengono [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":49701,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1991],"tags":[13,24,436,380,448,238],"class_list":{"0":"post-49699","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-consumatori-e-salute","8":"tag-acquacoltura","9":"tag-alghe","10":"tag-covid-19","11":"tag-microalghe","12":"tag-spirulina","13":"tag-zootecnia"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le microalghe per contrastare Covid-19, studi promettenti - FoodTimes<\/title>\n<meta name=\"description\" content=\"Recenti studi individuano nelle\u00a0microalghe\u00a0marine una serie di composti bioattivi con possibile azione anti-virale, anche nei confronti 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