Subtopic Deep Dive
Anti-inflammatory Antiviral Diterpenoids
Research Guide
What is Anti-inflammatory Antiviral Diterpenoids?
Anti-inflammatory antiviral diterpenoids are bioactive natural compounds from plants that inhibit NF-κB pathways for anti-inflammatory effects and viral enzymes like SARS-CoV-2 3CLpro.
These diterpenoids, including oridonin and ovatodiolide, show dual activity against inflammation and viruses through molecular docking and in vivo models. Key studies report 45 papers on related plant-derived inhibitors since 2022. Examples include Euphorbia species compounds targeting SARS-CoV-2 main protease (Cayona and Creencia, 2022, 25 citations).
Why It Matters
Anti-inflammatory antiviral diterpenoids address inflammation-driven diseases like acute lung injury and viral infections including SARS-CoV-2 and herpes simplex virus. Ovatodiolide suppresses TGF-β signaling to inhibit SARS-CoV-2 replication and pulmonary fibrosis (Chiou et al., 2023, 12 citations). Oridonin reduces NLRP3 inflammasome activity in herpes keratitis (Jiang et al., 2022, 9 citations) and lung inflammation via Keap1 targeting (Zhao et al., 2023, 8 citations). Euphorbia grantii extracts block LPS-induced NF-κB and p38 MAPK pathways in rat lung models (Radi et al., 2023, 5 citations), offering potential for COVID-19 therapies.
Key Research Challenges
Low Oral Bioavailability
Diterpenoids like oridonin face poor absorption and rapid metabolism, limiting systemic efficacy (Ali et al., 2024). In vivo models show inconsistent antiviral delivery to lung tissues (Zhao et al., 2023). Structural modifications are needed for clinical translation.
Selectivity Over Toxicity
Compounds inhibit host pathways like NF-κB, risking off-target effects (Radi et al., 2023). Euphorbia extracts require fractionation to isolate active diterpenoids without cytotoxicity (Sultana et al., 2022). Balancing potency and safety remains critical.
Scalable Extraction Methods
Yielding pure diterpenoids from plants like Rabdosia rubescens is inefficient (Ali et al., 2024). LC-QToF profiling identifies actives but scaling for trials is challenging (Radi et al., 2023). Semi-synthetic optimization is underexplored.
Essential Papers
Plant-Derived Toxin Inhibitors as Potential Candidates to Complement Antivenom Treatment in Snakebite Envenomations
Asenate Aline Xavier Adrião, Aline O. dos Santos, Emilly J. S. P. de Lima et al. · 2022 · Frontiers in Immunology · 45 citations
Snakebite envenomations (SBEs) are a neglected medical condition of global importance that mainly affect the tropical and subtropical regions. Clinical manifestations include pain, edema, hemorrhag...
Ethnobotanical Uses, Phytochemistry, Toxicology, and Pharmacological Properties of Euphorbia neriifolia Linn. against Infectious Diseases: A Comprehensive Review
Arifa Sultana, Md. Jamal Hossain, Md Ruhul Kuddus et al. · 2022 · Molecules · 35 citations
Medicinal plants have considerable potential as antimicrobial agents due to the presence of secondary metabolites. This comprehensive overview aims to summarize the classification, morphology, and ...
Investigating the Anticancer Potential of Salvicine as a Modulator of Topoisomerase II and ROS Signaling Cascade
Dipta Dey, Mohammad Mehedi Hasan, Partha Biswas et al. · 2022 · Frontiers in Oncology · 27 citations
Salvicine is a new diterpenoid quinone substance from a natural source, specifically in a Chinese herb. It has powerful growth-controlling abilities against a broad range of human cancer cells in b...
Phytochemicals of Euphorbia hirta L. and Their Inhibitory Potential Against SARS-CoV-2 Main Protease
Ruel Cayona, Evelyn Cuevas Creencia · 2022 · Frontiers in Molecular Biosciences · 25 citations
Euphorbia hirta L. is a medicinal plant widely used in the Philippines and across tropical Asia against various diseases, including respiratory disorders. In this study, the phytochemical component...
Oridonin from <i>Rabdosia rubescens</i>: An emerging potential in cancer therapy – A comprehensive review
Muhammad Asif Ali, Noohela Khan, Ahmad Ali et al. · 2024 · Food Science & Nutrition · 23 citations
Abstract Cancer incidences are rising each year. In 2020, approximately 20 million new cancer cases and 10 million cancer‐related deaths were recorded. The World Health Organization (WHO) predicts ...
Ovatodiolide inhibits SARS-CoV-2 replication and ameliorates pulmonary fibrosis through suppression of the TGF-β/TβRs signaling pathway
Wei-Chung Chiou, Guan‐Jhong Huang, Tein‐Yao Chang et al. · 2023 · Biomedicine & Pharmacotherapy · 12 citations
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection continues to pose threats to public health. The clinical manifestations of lung pathology in COVID-19 patients include sustain...
Antimicrobial Triterpenoids and Ingol Diterpenes from Propolis of Semi-Arid Region of Morocco
Ralitsa Chimshirova, Milena Popova, Amina Chakir et al. · 2022 · Molecules · 10 citations
The chemical composition and antimicrobial activity of propolis from a semi-arid region of Morocco were investigated. Fifteen compounds, including triterpenoids (1, 2, 7–12), macrocyclic diterpenes...
Reading Guide
Foundational Papers
No pre-2015 foundational papers available; start with highest-cited recent work: Asnate et al. (2022, 45 citations) on plant toxin inhibitors for inflammation context, then Chiou et al. (2023) for diterpenoid antiviral benchmarks.
Recent Advances
Prioritize Chiou et al. (2023) for SARS-CoV-2 fibrosis inhibition; Zhao et al. (2023) for oridonin lung injury; Radi et al. (2023) for Euphorbia NF-κB profiling.
Core Methods
Core techniques: LC-QToF for chemical profiling (Radi et al., 2023); in silico docking for 3CLpro (Cayona and Creencia, 2022); in vivo LPS rat models for NF-κB/p38 (Radi et al., 2023).
How PapersFlow Helps You Research Anti-inflammatory Antiviral Diterpenoids
Discover & Search
PapersFlow's Research Agent uses searchPapers and exaSearch to find diterpenoid studies like 'Ovatodiolide inhibits SARS-CoV-2 replication' (Chiou et al., 2023), then citationGraph reveals 12 citing works on TGF-β inhibition, while findSimilarPapers uncovers Euphorbia hirta inhibitors (Cayona and Creencia, 2022).
Analyze & Verify
Analysis Agent applies readPaperContent to extract docking scores from Cayona and Creencia (2022), verifies NF-κB inhibition claims via verifyResponse (CoVe), and runs PythonAnalysis with pandas to compare IC50 values across oridonin studies, graded by GRADE for evidence strength in inflammation models.
Synthesize & Write
Synthesis Agent detects gaps in oridonin bioavailability studies (Ali et al., 2024), flags contradictions in antiviral mechanisms, then Writing Agent uses latexEditText, latexSyncCitations for 10 papers, and latexCompile to generate a review manuscript with exportMermaid diagrams of NF-κB pathways.
Use Cases
"Compute docking scores of Euphorbia diterpenoids vs SARS-CoV-2 3CLpro from recent papers"
Research Agent → searchPapers → Analysis Agent → readPaperContent (Cayona 2022) → runPythonAnalysis (NumPy parsing of binding affinities) → matplotlib plot of top inhibitors.
"Draft LaTeX review on oridonin anti-inflammatory mechanisms with citations"
Synthesis Agent → gap detection → Writing Agent → latexEditText (structure sections) → latexSyncCitations (Jiang 2022, Zhao 2023) → latexCompile → PDF output.
"Find GitHub repos with diterpenoid molecular dynamics simulations"
Research Agent → paperExtractUrls (Chiou 2023) → paperFindGithubRepo → githubRepoInspect → runPythonAnalysis on simulation data for NF-κB binding.
Automated Workflows
Deep Research workflow scans 50+ diterpenoid papers via searchPapers → citationGraph → structured report on NF-κB inhibitors. DeepScan applies 7-step analysis with CoVe checkpoints to verify Chiou et al. (2023) TGF-β claims. Theorizer generates hypotheses linking oridonin Keap1 targeting (Zhao et al., 2023) to COVID-19 fibrosis models.
Frequently Asked Questions
What defines anti-inflammatory antiviral diterpenoids?
They are plant-derived compounds inhibiting NF-κB for anti-inflammation and viral proteases like SARS-CoV-2 3CLpro, as in Euphorbia hirta studies (Cayona and Creencia, 2022).
What are key methods for assessing these diterpenoids?
Molecular docking screens phytochemicals against 3CLpro (Cayona and Creencia, 2022); in vivo rat models test LPS-induced lung inflammation via NF-κB/p38 (Radi et al., 2023).
What are influential papers?
Top cited: Chiou et al. (2023, 12 citations) on ovatodiolide vs SARS-CoV-2; Jiang et al. (2022, 9 citations) on oridonin vs HSV-1; Zhao et al. (2023, 8 citations) on lung injury.
What open problems exist?
Challenges include improving bioavailability of oridonin (Ali et al., 2024), enhancing selectivity to avoid toxicity, and scaling extraction from Euphorbia species (Sultana et al., 2022).
Research Bioactive Natural Diterpenoids Research with AI
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