Project description:Andrographis paniculata Nees and its major compound andrographolide is known to exhibit a pleothera of activities. Active component enriched extracts are known to provide various beneficial effects, and therefore it was interesting to investigate whether increased amount of major compound alters gene expression. To acheive this, HePG2 cells treated with Andrographis paniculata extract (AP) and andrographolide enriched –extract (AP20) were subjected to microarray analysis to check their effect on global gene expression.
Project description:Andrographis paniculata (AP) is a medicinal herb used to treat infectious diseases. The medicinal properties are due to presence of andrographolide and other secondary metabolites synthesized via mevalonic acid (MVA) and methyl erythritol phosphate (MEP) pathways. To increase the andrographolide content plants were treated with 50µM Jasmonic acid (JA) for one week. HPLC analysis revealed that one fold increase in the andrographolide content compared to control. To study the signal mechanism underlying in the stress response, samples were subjected to Q-TOF-LC-MS/MS analysis. JA influences the expression of MVA and MEP enzymes in treated (22 enzymes) than in untreated (3 enzymes). We found total 3308 proteins in control and 3994 in elicited sample in which 1393 were commonly found in both. The differential expression revealed 621 proteins were down-regulated and 201 proteins were up regulated. The functional annotation involved 40 metabolic processes where post translational modifications was highly up regulated in treated (5.7%). The total proteome of A.paniculata was reported for the first time. The comparison of elicited and non elicited (control) samples revealed that the elicitation is an integrated process which release variety of bioactive compounds to defend itself from variety of pathogens. The Knowledge obtained from this scrutiny, JA dependent stress adaptive response is likely to have industrial and agricultural impact. It creates a hope towards future for the development of eco-friendly ways of managing pests and tapping into a largely unexplored treasure of plant-derived bioactive metabolites for human use. Particularly in this plant, it is useful for the production of medicines to cure different kinds of diseases and disorders.
Project description:Microbial biofertilizers were investigated for their ability to mitigate drought stress and enhance resilience in Andrographis paniculata. High-performance liquid chromatography (HPLC) analysis revealed that microbial biofertilizer significantly increased andrographolide content, a key bioactive compound, even under drought stress.
Project description:Andrographolide (AP), a diterpenoid compound extracted from Andrographis paniculata, has been shown to be a promising therapy for Alzheimer's disease (AD) in preclinical studies, but the involved mechanisms still need to be clarified. Here we showed that AP improved cognition function and reduced amyloid-β (Aβ) plaque accumulation of 5×FAD transgenic mice by mitigating microglial senescence.
Project description:To shed light on the biosynthesis mechanisms of these diterpenes, we performed the first high-throughput RNA-seq for A. paniculata leaves with time-serialized MeJA treatments. The transcriptomic approach not only defined a comprehensive transcriptome (comprised of 20,629 highly expressed genes), but also profiled time-serialized gene expression patterns with 4,463 up-regulated genes and 6,517 down-regulated genes responding to MeJA induction. These up-regulated genes significantly enriched in biological processes like stress responses, metabolic pathways, and secondary metabolites biosynthesis, especially terpene/terpenoid metabolic process. Consistent with the gradual accumulation of andrographolide, the expression of most genes involved in MEP pathway showed progressive increase. In the hypothetical terpenoid metabolism pathway, ApCPS2, which was putatively involved in andrographolide synthesis, dramatically increased its expression. Among other co-regulated genes, 154 genes encode cytochrome P450s (CYP450s); 42 genes were predicted as UDP glycosyltransferases (UGTs); and 363 genes belong to transcription factors.
2018-12-31 | GSE83775 | GEO
Project description:Transcriptome of Andrographis paniculata
