Exploring the functional role of Hijiki in obesity-associated to sphingolipid metabolism
| Project/Area Number |
21K14812
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 38050:Food sciences-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2022)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2024: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | Hijiki / obesity / Sphingolipid metabolism / LC/MS / Obesity |
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| Outline of Research at the Start |
(1) Isolate and characterize the chemical constituent of Hijiki responsible for SMS inhibition. (2) Determination of its IC50 and mode of action on the lipid droplet formation by cell-based assay (3) Revealing the in vitro effects by analysis of altered cellular lipid biomarkers by LC-MS (4) Elucidate the in vivo effects by oral administration of the active constituent of
Hijiki using High-fat diet mouse model.
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| Outline of Annual Research Achievements |
The project is going well, we have identified the active fraction and component of hijiki responsible for SMS inhibition. The in vitro assays were performed using the active fraction of hijiki in C3A cells to reveal its action against lipid droplet accumulation. We have found that hijiki active fraction significantly suppressed the lipid droplet accumulation. However, these are preliminary results, we are examining in detail by various analysis including LC/MS analysis of lipid contents changed upon hijiki active fraction treatment. Further, the active fraction is purified by column chromatography after repetitive purification, HRMS and NMR data of the pure compound were obtained. The structural analysis is in progress after gathering all the data.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Currently, the project is running smoothly, and we are at the stage to conduct the in vitro experiments this year using the purified active compound of hijiki. The reasons for choosing the above option is due to challenges associated with the compound purification as well as establishment of LC/MS based SMS inhibition assay.
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| Strategy for Future Research Activity |
In the future, I aim to conduct the experiments after purifying the large amount of Hijiki derived active compound responsible for SMS inhibition. Hence, in this year the research will be focused on large scale purification of Hijiki derived active compound and confirming SMS inhibition by both HPLC with fluorescent detection and LC/MS based assays. Then in vitro experiments using isolated compound and C3A cells stimulated with lipid droplets will be planned as proposed in the plan. Furthermore, experiments including action of the active component on lipid droplet oxidation will be performed.
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Report
(2 results)
Research Products
(5 results)
