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1.
J Plant Physiol ; 287: 154043, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37392527

RESUMEN

Lamiophlomis rotata is a medicinal plant in Qinghai-Tibet Plateau, in which flavonoid compounds are the major medicinal components. However, it remains unclear how flavonoid metabolism of L. rotata is influenced by soil properties and microbial community. In this study, we collected L. rotata seedlings and rhizosphere soils from five habitats ranging from 3750 to 4270 m of altitude and analyzed the effects of habitat conditions on flavonoid metabolism. The activities of peroxidase, cellulase, and urease were increased with altitude, while those of alkaline phosphatase, alkaline protease, and sucrase were decreased with altitude. Analysis of OTUs showed that the total number of bacterial genera was higher than that of fungal genera. The highest number of fungal genera was 132, and that of bacterial genera was 33 in Batang (BT) town in Yushu County at an altitude of 3880 m, suggesting that the fungal communities may play a critical role in L. rotata rhizosphere soils. Flavonoids in leaves and roots of L. rotata shared a similar pattern, with a trend of increasing levels with altitude. The highest flavonoid content measured, 12.94 mg/g in leaves and 11.43 mg/g in roots, was from Zaduo (ZD) County at an altitude of 4208 m. Soil peroxidases affected quercetin content in leaves of L. rotata, while the fungus Sebacina affected flavonoid content in leaves and roots of L. rotata. The expression of PAL, F3'H, FLS, and FNS genes showed a declining trend in leaves with altitude, while F3H showed an increasing trend in both leaves and roots. Overall, soil physicochemical properties and microbial community affect flavonoid metabolism in L. rotata in Qinghai-Tibet Plateau. The variations in flavonoid content and gene expression as well as their associations with soil factors revealed the complexity of the growth conditions and genetic makeup in L. rotata habitats of Qinghai-Tibet Plateau.


Asunto(s)
Microbiota , Suelo , Tibet , Flavonoides , Expresión Génica , Microbiología del Suelo
2.
Genes (Basel) ; 14(3)2023 02 24.
Artículo en Inglés | MEDLINE | ID: mdl-36980847

RESUMEN

Lamiophlomis rotata (Benth.) Kudo is a perennial and unique medicinal plant of the Qinghai-Tibet Plateau. It has the effects of diminishing inflammation, activating blood circulation, removing blood stasis, reducing swelling, and relieving pain. However, thus far, reliable reference gene identifications have not been reported in wild L. rotata. In this study, we identified suitable reference genes for the analysis of gene expression related to the medicinal compound synthesis in wild L. rotata subjected to five different-altitude habitats. Based on the RNA-Seq data of wild L. rotata from five different regions, the stability of 15 candidate internal reference genes was analyzed using geNorm, NormFinder, BestKeeper, and RefFinder. TFIIS, EF-1α, and CYP22 were the most suitable internal reference genes in the leaves of L. rotata from different regions, while OBP, TFIIS, and CYP22 were the optimal reference genes in the roots of L. rotata. The reference genes identified here would be very useful for gene expression studies with different tissues in L. rotata from different habitats.


Asunto(s)
Lamiaceae , Plantas Medicinales , Tibet , Lamiaceae/genética , Perfilación de la Expresión Génica , Dolor , Plantas Medicinales/genética
3.
J Plant Physiol ; 279: 153856, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36375401

RESUMEN

Lycium chinense is an important medicinal plant in the northwest of China. Flavonoids are the major pharmacological components of L. chinense fruits. However, flavonoid metabolism during fruit development of L. chinense remains to be studied. Here, we analyzed the change of flavonoid contents, enzyme activity, and gene expression during fruit development of L. chinense. We found that flavonoids, anthocyanins, and catechins are the most important components of L. chinense fruits. Flavonoid content was increased with fruit development and was high at the late developmental stage. PAL, CHS, and F3H enzymes played a significant role in flavonoid accumulation in fruits. Transcriptomic analysis showed that anthocyanin pathway, flavonol pathway, flavonoid biosynthesis, and phenylpropanoid synthesis pathway were the major pathways involved in flavonoid metabolism in L. chinense. Gene expression analysis indicated that PAL1 and CHS2 genes were critical for flavonoid metabolism in L. chinense fruits. These discoveries help us understand the dynamic changes in flavonoids during fruit development and enhance the use of L. chinense fruits.


Asunto(s)
Lycium , Lycium/genética , Frutas/genética , Antocianinas , Reproducción , Flavonoides , Regulación de la Expresión Génica de las Plantas
4.
Cell Death Dis ; 8(11): e3167, 2017 11 09.
Artículo en Inglés | MEDLINE | ID: mdl-29120412

RESUMEN

MicroRNAs (miRNAs) have been suggested to repress transcription via binding the 3'-untranslated regions of mRNAs. However, the involvement and details of miRNA-mediated epigenetic regulation, particularly in targeting genomic DNA and mediating epigenetic regulation, remain largely uninvestigated. In the present study, transcription factor CCAAT/enhancer binding protein delta (CEBPD) was responsive to the anticancer drug bortezomib, a clinical and highly selective drug for leukemia treatment, and contributed to bortezomib-induced cell death. Interestingly, following the identification of CEBPD-induced miRNAs, we found that miR-744, miR-3154 and miR-3162 could target CpG islands in the 5'-flanking region of the CEBPD gene. We previously demonstrated that the Yin Yang 1 (YY1)/polycomb group (PcG) protein/DNA methyltransferase (DNMT) complex is important for CCAAT/enhancer binding protein delta (CEBPD) gene inactivation; we further found that Argonaute 2 (Ago2) interacts with YY1 and binds to the CEBPD promoter. The miRNA/Ago2/YY1/PcG group protein/DNMT complex linked the inactivation of CEBPD and genes adjacent to its 5'-flanking region, including protein kinase DNA-activated catalytic polypeptide (PRKDC), minichromosome maintenance-deficient 4 (MCM4) and ubiquitin-conjugating enzyme E2 variant 2 (UBE2V2), upon bortezomib treatment. Moreover, we revealed that miRNA binding is necessary for YY1/PcG group protein/DNMT complex-mediated epigenetic gene silencing and is associated with bortezomib-induced methylation on genomic DNA. The present study successfully characterized the interactions of the miRNA/Ago2/YY1/PcG group protein/DNMT complex and provided new insights for miRNA-mediated epigenetic regulation in bortezomib-induced leukemic cell arrest and cell death.


Asunto(s)
Apoptosis/efectos de los fármacos , Bortezomib/farmacología , Leucemia/fisiopatología , MicroARNs/metabolismo , Regiones no Traducidas 3' , Antineoplásicos/farmacología , Proteínas Argonautas/química , Proteínas Argonautas/metabolismo , Proteína delta de Unión al Potenciador CCAAT/genética , Proteína delta de Unión al Potenciador CCAAT/metabolismo , Línea Celular Tumoral , Islas de CpG , Metilación de ADN/efectos de los fármacos , Proteína Quinasa Activada por ADN/genética , Proteína Quinasa Activada por ADN/metabolismo , Silenciador del Gen , Humanos , Leucemia/metabolismo , Ligasas/genética , Ligasas/metabolismo , MicroARNs/genética , Componente 4 del Complejo de Mantenimiento de Minicromosoma/genética , Componente 4 del Complejo de Mantenimiento de Minicromosoma/metabolismo , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Regiones Promotoras Genéticas , Unión Proteica , Transcripción Genética/efectos de los fármacos , Enzimas Ubiquitina-Conjugadoras , Factor de Transcripción YY1/química , Factor de Transcripción YY1/metabolismo
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