Evidence map›Paper›PMID 30704105›Full record

ReviewMolecules (Basel, Switzerland)2019

Pyrrolizidine Alkaloids: Biosynthesis, Biological Activities and Occurrence in Crop Plants.

Sebastian Schramm, Nikolai Köhler, Wilfried Rozhon

Open access · goldAbstract readReview
In one paragraph

Review in Molecules (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
6.6field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

59 citing papers in PubMed, 169 citations in OpenAlex.

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  9. A Review of the Main Biologically Active Compounds of the GenusPharmaceuticals (Basel, Switzerland) · 2025
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Sebastian SchrammBiotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany. seb.schramm@tum.de.
Nikolai KöhlerBiotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany. nikolai.koehler@tum.de.
Wilfried RozhonBiotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany. wilfried.rozhon@wzw.tum.de.ORCID 0000-0003-0659-0593
Technical University of Munich · DE

Funding

Deutsche Forschungsgemeinschaft -
6 · The paper itself

Abstract

Pyrrolizidine alkaloids (PAs) are heterocyclic secondary metabolites with a typical pyrrolizidine motif predominantly produced by plants as defense chemicals against herbivores. They display a wide structural diversity and occur in a vast number of species with novel structures and occurrences continuously being discovered. These alkaloids exhibit strong hepatotoxic, genotoxic, cytotoxic, tumorigenic, and neurotoxic activities, and thereby pose a serious threat to the health of humans since they are known contaminants of foods including grain, milk, honey, and eggs, as well as plant derived pharmaceuticals and food supplements. Livestock and fodder can be affected due to PA-containing plants on pastures and fields. Despite their importance as toxic contaminants of agricultural products, there is limited knowledge about their biosynthesis. While the intermediates were well defined by feeding experiments, only one enzyme involved in PA biosynthesis has been characterized so far, the homospermidine synthase catalyzing the first committed step in PA biosynthesis. This review gives an overview about structural diversity of PAs, biosynthetic pathways of necine base, and necic acid formation and how PA accumulation is regulated. Furthermore, we discuss their role in plant ecology and their modes of toxicity towards humans and animals. Finally, several examples of PA-producing crop plants are discussed.

Indexed as

Alkyl and Aryl TransferasesAmine Oxidase (Copper-Containing)Biosynthetic PathwaysCopperCrops, AgriculturalCytochrome P-450 Enzyme SystemDicarboxylic AcidsModels, MolecularMolecular ConformationMolecular StructurePyrrolizidine AlkaloidsAlkyl and Aryl TransferasesAmine Oxidase (Copper-Containing)CopperCytochrome P-450 Enzyme SystemDicarboxylic Acidshomospermidine synthetasenecic acidPyrrolizidine AlkaloidsBorago officinalisCopper-dependent diamine oxidaseCrassocephalumGynura bicolorHomospermidine synthaseLolium perenneNecic acidsNecine basesPyrrolizidine alkaloid biosynthesisSenecionine

Identifiers

PMID30704105
PMCPMC6385001
OpenAlexW2911549438

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.