Nigella sativa and its chemical constituents: pre-clinical and clinical evidence for their potential anti-SARS-CoV-2 effects

Cyril, Asha Caroline; Ali, Najma Mohamed; Nelliyulla Parambath, Anagha; Vazhappilly, Cijo George; Jan, Reem Kais; Karuvantevida, Noushad; Aburamadan, Haneen; Lozon, Yosra; Radhakrishnan, Rajan

doi:10.1007/s10787-023-01385-9

Cited by 1 publication

(1 citation statement)

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“…Compared with the large majority of investigations evaluating the in silico potential of plant metabolites, few studies reported in vitro anti-SARS-CoV-2 activity of plant extracts (Nair et al, 2022; Chen et al, 2023; De Araujo et al, 2023; Farooq et al, 2024; Kakimoto et al, 2024; Rodrigues et al, 2024). Certain plants with a long history of use in traditional medicine systems to manage flu syndromes, as for example Withania somnifera (L.) Dunal, Andrographis paniculata (Burm.F) Wall.ex Nees, Echinacea purpurea (L.) Moench, Artemisia annua and Nigella sativa L., have shown to be promising candidates in the search for an effective preventive or curative treatment of COVID-19 (Kolev et al, 2022; Nair et al, 2022; Nicolussi et al, 2022; Cyril et al, 2023; Ramli et al, 2023; Shanker et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Historical texts as a potential resource for plant-derived natural products against SARS-CoV-2 – the example of theReceptariumof Burkhard III von Hallwyl from 16th century Switzerland

Vahekeni,

Stehlin,

Urmann

et al. 2024

Preprint

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In the search for more effective prophylactic and possibly curative therapeutics against SARS-CoV-2, an historical-ethnobotanical approach was used to select plants described in theReceptariumof Burkhard III von Hallwyl (RBH), an influential recipe text from 16th century Switzerland. Ten species were identified based on specific historical uses presumably linked with the treatment of viral infections as well as inflammatory conditions. For each plant candidate, aqueous and hydroethanolic extracts have been produced. CellTiter-Glo® Luminescent Cell Viability Assay was used to assess antiviral activity against SARS-CoV-2 and the effect on cell viability of the extracts.Of the ten plant species tested, four displayed an antiviral activity ≥ 50% at 16.7 µg/ml with acceptable cell viability (> 75%):Sambucus nigraL. (leaves),Viola odorataL. (leaves),Geranium robertianumL. (arial parts) andArtemisia vulgarisL. (aerial parts). The crude extracts were partitioned in aqueous and organic fractions and further analyzed. The ethyl acetate fractions ofS. nigra, V. odorataandG. robertianumexpressed significant antiviral activity of nearly 100% at 5.6 µg/ml (P < 0.05). The most potent inhibitory activity was observed for the ethyl acetate fraction ofViola odorataL. (leaves) with 87% at 1.9 µg/ml (P < 0.0001). Alongside bioactivity analysis phytochemical fingerprints were made, with the aim to understand important substance classes contained. Further investigations are required to explore the active principles.Our study shows that an ethnopharmacological approach based on historical records of traditional use to select potential herbal candidates coupled with a rational screening process enables an efficient search for plant-derived natural products with antiviral activity against SARS-CoV-2.

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