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Plant Toxicity and Pharmacological Properties
Research Guide
What is Plant Toxicity and Pharmacological Properties?
Plant Toxicity and Pharmacological Properties is the study of toxicity, metabolism, genotoxic effects, and pharmacological implications of plant secondary compounds such as pyrrolizidine alkaloids, particularly their roles in hepatic sinusoidal obstruction syndrome, carcinogenicity, and risk assessment in food and herbal medicines.
This field encompasses 53,647 papers on the health consequences of pyrrolizidine alkaloids, focusing on their genotoxicity and presence in food safety contexts. Research examines metabolism and associations with diseases like hepatic sinusoidal obstruction syndrome. Secondary compounds in plants influence herbivory strategies, as detailed in foundational works on plant defenses.
Topic Hierarchy
Research Sub-Topics
Pyrrolizidine Alkaloids Genotoxicity
Researchers investigate the DNA-damaging mechanisms of pyrrolizidine alkaloids, including DNA adduct formation and mutagenicity assays. Studies focus on chromosomal aberrations and repair pathways in exposed cells.
Pyrrolizidine Alkaloids Metabolism
This sub-topic examines cytochrome P450-mediated bioactivation of PAs to reactive pyrrole metabolites in liver and extrahepatic tissues. Research explores species-specific metabolic differences and detoxification pathways.
Hepatic Sinusoidal Obstruction Syndrome Pyrrolizidine Alkaloids
Studies analyze veno-occlusive liver damage from PA-induced endothelial toxicity, including histopathological features and clinical outcomes. Research includes diagnostic biomarkers and therapeutic interventions for HSOS.
Pyrrolizidine Alkaloids Carcinogenicity
Researchers assess long-term tumorigenicity in animal models and mechanistic links to genotoxic metabolites. Epidemiological studies evaluate human cancer risks from chronic low-dose PA exposure.
Pyrrolizidine Alkaloids Risk Assessment Food Herbal Medicines
This area develops exposure models, benchmark dose analyses, and margins of exposure for PA contaminants in foods and supplements. Studies validate analytical methods for PA detection and risk mitigation strategies.
Why It Matters
Pyrrolizidine alkaloids in herbal medicines and contaminated food pose risks of genotoxicity and carcinogenicity, necessitating risk assessments for public health. "Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds" by Freeland and Janzen (1974) explains how these compounds deter large herbivores, affecting nutritional selection and ecosystem dynamics with 1347 citations. Fumonisins, structurally related mycotoxins from Fusarium moniliforme, inhibit sphingolipid biosynthesis, linking to equine leucoencephalomalacia, porcine pulmonary edema, and rat liver cancer, as shown by Wang et al. (1991) with 1103 citations, highlighting applications in veterinary toxicology and food safety.
Reading Guide
Where to Start
"Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds" by Freeland and Janzen (1974), as it provides a foundational, accessible overview of how plant secondary compounds drive toxicity and herbivore adaptations, with 1347 citations.
Key Papers Explained
"Phytochemical Methods" by Harborne (1984, 1163 citations) establishes analytical techniques for secondary compounds, which Freeland and Janzen (1974, 1347 citations) apply to herbivory strategies. Wang et al. (1991, 1103 citations) extend this to mycotoxin mechanisms like fumonisin inhibition of sphingolipids. Schardl et al. (2004, 888 citations) connect endophyte symbioses to alkaloid production, building on earlier phytochemical foundations.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research centers on pyrrolizidine alkaloid risk assessment in food safety and herbal medicines, with emphasis on genotoxicity and hepatic effects. No recent preprints or news available, so frontiers follow from top papers on metabolism and secondary compound defenses.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Phytochemical Methods | 1974 | Kew Bulletin | 1.5K | ✕ |
| 2 | Investigation of chromium, cerium and cobalt as markers in dig... | 1980 | Journal of the Science... | 1.4K | ✕ |
| 3 | Strategies in Herbivory by Mammals: The Role of Plant Secondar... | 1974 | The American Naturalist | 1.3K | ✕ |
| 4 | Asteraceae: Cladistics and Classification | 1994 | — | 1.3K | ✕ |
| 5 | Phytochemical Methods | 1984 | — | 1.2K | ✕ |
| 6 | Inhibition of sphingolipid biosynthesis by fumonisins. Implica... | 1991 | Journal of Biological ... | 1.1K | ✓ |
| 7 | Xeroderma pigmentosum. Cutaneous, ocular, and neurologic abnor... | 1987 | Archives of Dermatology | 1.1K | ✕ |
| 8 | The Journal of the Hattori Botanical Laboratory | 1955 | The Bryologist | 994 | ✕ |
| 9 | SYMBIOSES OF GRASSES WITH SEEDBORNE FUNGAL ENDOPHYTES | 2004 | Annual Review of Plant... | 888 | ✕ |
| 10 | Current Therapy in Equine Medicine 3 | 1992 | Journal of Veterinary ... | 884 | ✓ |
Frequently Asked Questions
What are the main health risks of pyrrolizidine alkaloids?
Pyrrolizidine alkaloids cause genotoxic effects, hepatic sinusoidal obstruction syndrome, and potential carcinogenicity. They contaminate food and herbal medicines, requiring risk assessment. Their metabolism leads to health consequences documented across 53,647 papers.
How do plant secondary compounds affect mammalian herbivory?
Secondary compounds vary in type and concentration across plant species, influencing food selection by large herbivores. "Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds" by Freeland and Janzen (1974) details differences in nutritional value, toughness, and chemical defenses. These compounds deter consumption, shaping herbivore diets.
What is the toxicity mechanism of fumonisins from Fusarium moniliforme?
Fumonisins inhibit sphingolipid biosynthesis, contributing to diseases like equine leucoencephalomalacia and porcine pulmonary edema. Wang et al. (1991) in "Inhibition of sphingolipid biosynthesis by fumonisins" demonstrated this with culture materials and contaminated grains causing liver cancer in rats. The compounds share structural similarity to natural substrates.
How are phytochemical methods used in toxicity studies?
"Phytochemical Methods" by Harborne (1984) provides techniques for analyzing plant compounds, cited 1163 times in toxicity research. These methods identify secondary metabolites like alkaloids relevant to pharmacological properties. They support investigations into metabolism and genotoxicity.
What role do fungal endophytes play in grass toxicity?
Grasses form symbioses with Clavicipitaceae fungi like Epichloë, producing toxic alkaloids. "SYMBIOSES OF GRASSES WITH SEEDBORNE FUNGAL ENDOPHYTES" by Schardl et al. (2004) reviews this continuum from mutualism to antagonism, cited 888 times. Endophytes enhance plant defenses but impart toxicity to grazing mammals.
Open Research Questions
- ? How do metabolic pathways of pyrrolizidine alkaloids differ across species to influence genotoxic outcomes?
- ? What thresholds define safe exposure levels for pyrrolizidine alkaloids in herbal medicines?
- ? How do plant secondary compounds interact with gut microbiota to modulate toxicity?
- ? Which fungal endophyte strains in grasses produce the most potent pharmacological alkaloids?
- ? Can markers like chromium or cerium quantify digesta passage rates altered by plant toxins?
Recent Trends
The field includes 53,647 works with no specified 5-year growth rate.
Citations remain high for classics like Freeland and Janzen (1974, 1347 citations) on secondary compounds and Wang et al. (1991, 1103 citations) on fumonisin toxicity.
No recent preprints or news reported in the last 6-12 months.
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