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Haraguchi A, Nagasawa J, Kuramochi K, Tsuchida S, Kobayashi A, Hatabu T, Sasai K, Ikadai H, Ushida K, Matsubayashi M. Anticoccidial activity of the secondary metabolites in alpine plants frequently ingested by wild Japanese rock ptarmigans. Int J Parasitol Parasites Wildl 2024; 25:100967. [PMID: 39220322 PMCID: PMC11362645 DOI: 10.1016/j.ijppaw.2024.100967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/12/2024] [Accepted: 07/13/2024] [Indexed: 09/04/2024]
Abstract
The Japanese rock ptarmigan (Lagopus muta japonica) is an herbivorous species of partridges that inhabits only alpine zones. Alpine plants are their main source of food. These alpine plants contain toxic compounds to deter herbivores from consuming them. A previous analysis of the alpine plants frequently consumed by Japanese rock ptarmigans revealed the presence of a unique mixture of secondary metabolites and a novel compound. Additionally, wild Japanese rock ptarmigans are often infected by two species of Eimeria parasites. When these parasites were experimentally administered to Svalbard rock ptarmigans (Lagopus muta hyperborean), which do not feed on alpine plants, the birds exhibited symptoms, such as diarrhea and depression, and in some cases, they died. Although little is known about the pathogenesis of these parasites in wild Japanese rock ptarmigans, it was hypothesized that compounds found in alpine plants, their main food source, may reduce the pathogenicity of Eimeria parasites. In the present study, we evaluated the anticoccidial activity of the compounds derived from alpine plants in vitro using Eimeria tenella, which infects chickens belonging to the same pheasant family, as an experimental model. Twenty-seven natural components were extracted from eight alpine plants. The natural components were added to E. tenella sporozoites and incubated for 24 h to evaluate their direct effect. Additionally, Madin-Darby bovine kidney cells were incubated with sporozoites and natural components for 24 h to evaluate the inhibitory effect of the components on sporozoite cell invasion. Six compounds from four alpine plants decreased sporozoite viability by up to 88.3%, and two compounds inhibited sporozoite invasion into the cells. Although further studies are needed to evaluate the effects of these components against Eimeria infections in vivo, our findings suggest that these alpine plants may reduce the degree of infection by decreasing the number of sporozoites in the intestinal tract.
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Affiliation(s)
- Asako Haraguchi
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, Izumisano, Osaka, 598-8531, Japan
- Laboratory of Veterinary Parasitology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, 034-8628, Japan
| | - Jyunki Nagasawa
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, Izumisano, Osaka, 598-8531, Japan
| | - Kouji Kuramochi
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, Japan
| | - Sayaka Tsuchida
- College of Bioscience and Biotechnology, Chubu University, Aichi, 487-8501, Japan
| | - Atsushi Kobayashi
- Shin-etsu Nature Conservation Office, Ministry of the Environment, Ministry of Environment, Nagano, 380-0846, Japan
| | - Toshimitsu Hatabu
- Laboratory of Animal Physiology, Department of Animal Science, Faculty of Environmental, Life, Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan
| | - Kazumi Sasai
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, Izumisano, Osaka, 598-8531, Japan
| | - Hiromi Ikadai
- Laboratory of Veterinary Parasitology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, 034-8628, Japan
| | - Kazunari Ushida
- College of Bioscience and Biotechnology, Chubu University, Aichi, 487-8501, Japan
| | - Makoto Matsubayashi
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, Izumisano, Osaka, 598-8531, Japan
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Panja SK, Patra S, Bag BG. Self-assembly of the monohydroxy triterpenoid lupeol yielding nano-fibers, sheets and gel: environmental and drug delivery applications. RSC Adv 2021; 11:33500-33510. [PMID: 35497535 PMCID: PMC9042272 DOI: 10.1039/d1ra06137b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/01/2021] [Indexed: 11/21/2022] Open
Abstract
Lupeol is a medicinally important naturally abundant triterpenoid having a 6-6-6-6-5 fused pentacyclic backbone and one polar secondary "-OH" group at the C3 position of the "A" ring. It was extracted from the dried outer bark of Bombax ceiba and its self-assembly properties were investigated in different neat organic as well as aquous-organic binary liquid mixtures. The triterpenoid having only one polar "-OH" group and a rigid lipophilic backbone self-assembled in neat organic non-polar liquids like n-hexane, n-heptane, n-octane and polar liquids like DMSO, DMF, DMSO-H2O, DMF-H2O, and EtOH-H2O yielding supramolecular gels via formation of nano to micrometre long self-assembled fibrillar networks (SAFINs). Morphological investigation of the self-assemblies was carried out by field emission scanning electron microscopy, high resolution transmission electron microscopy, atomic force microscopy, optical microscopy, concentration dependent FTIR and wide angle X-ray diffraction studies. The mechanical properties of the gels were studied by concentration dependent rheological studies in different solvents. The gels were capable of removing toxic micro-pollutants like rhodamine-B and 5,6-carboxyfluorescein as well as the toxic heavy metal Cr(vi) from contaminated water. Moreover release of the chemotherapeutic drug doxorubicin from a drug loaded gel in PBS buffer at pH 7.2 has also been demonstrated by spectrophotometry.
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Affiliation(s)
- Saikat Kumar Panja
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
| | - Soumen Patra
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
| | - Braja Gopal Bag
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
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