Secondary Metabolites of the Lichen <i>Lethariella cladonioides</i> and Their Neuroprotective Potential
Bibliographic record
Abstract
In the pathogenesis of neurodegenerative diseases, particularly Alzheimer’s disease, cholinergic neuron dysfunction and neuroinflammation are integral components. Against this backdrop, within the vast array of potential sources under exploration, Lethariella cladonioides, a remarkable lichen with profound ethnopharmacological significance among various Chinese ethnic minorities, has recently emerged as a promising candidate. Through our comprehensive phytochemical investigation, five undescribed diphenylmethanes ( 1 – 5 ), three unreported depsides ( 6 – 8 ), and one novel diphenylether ( 9 ), along with 16 known compounds, were successfully isolated and identified. Their structures were elucidated by spectroscopic analysis and X-ray crystallography. Specifically, compounds 3 – 7 and 9 exhibited acetylcholinesterase inhibitory activity, while compounds 1, 2, and 4 significantly inhibited NO production by LPS in RAW264.7 cells. Collectively, these findings suggest that L. cladonioides has potential value in preventing and treating neurodegenerative diseases. This potential lies in its ability to potentially retard disease progression or alleviate symptoms by enhancing cholinergic transmission and mitigating neuroinflammation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".