PcENO3 interacts with patchoulol synthase to positively affect the enzymatic activity and patchoulol biosynthesis in Pogostemon cablin.

Patchouli alcohol, a significant bioactive component of the herbal plant Pogostemon cablin, has considerable medicinal and commercial potential. Several genes and transcription factors involved in the biosynthesis pathway of patchouli alcohol have been identified. However, so far, regulatory factors directly interacting with patchouli synthase (PTS) have not been reported. This study was conducted to analyze the interaction between PcENO3 and PcPTS to explore the molecular regulation effect of PcENO3 on patchouli alcohol biosynthesis. PcENO3, a homologous protein of Arabidopsis ENO3 belonging to the enolase family, was identified and characterized. Subcellular localization experiments in Arabidopsis protoplast cells indicated that the PcENO3 protein was localized in both the cytoplasm and nucleus. The physical interaction between PcENO3 and PcPTS was confirmed through yeast two-hybrid (Y2H), GST pull-down, and bimolecular fluorescence complementation assays. Furthermore, the Y2H assay demonstrated that PcENO3 could also interact with JAZ proteins in the JA pathway. Enzymatic assays showed that the interaction with PcENO3 increased the catalytic activity of patchoulol synthase. Additionally, suppression of PcENO3 expression with VIGS (virus-induced gene silencing) decreased patchouli alcohol content compared to the control. These findings suggest that PcENO3 interacts with patchoulol synthase and modulates patchoulol biosynthesis by enhancing the enzymatic activity of PcPTS.

GC-MS and UHPLC-QTOFMS-assisted identification of the differential metabolites and metabolic pathways in key tissues of Pogostemon cablin.

Pogostemon cablin is an important aromatic medicinal herb widely used in the pharmaceutical and perfume industries. However, our understanding of the phytochemical compounds and metabolites within P. cablin remains limited. To our knowledge, no integrated studies have hitherto been conducted on the metabolites of the aerial parts of P. cablin. In this study, twenty-three volatile compounds from the aerial parts of P. cablin were identified by GC-MS, predominantly sesquiterpenes. Quantitative analysis showed the highest level of patchouli alcohol in leaves (24.89 mg/g), which was 9.12 and 6.69-fold higher than in stems and flowers. UHPLC-QTOFMS was used to analyze the non-volatile compounds of leaf, stem and flower tissues. The differences in metabolites between flower and leaf tissues were the largest. Based on 112, 77 and 83 differential metabolites between flower-leaf, flower-stem and leaf-stem, three tissue-specific biomarkers of metabolites were identified, and the differential metabolites were enriched in several KEGG pathways. Furthermore, labeling differential metabolites in the primary and secondary metabolic pathways showed that flowers accumulated more lipids and amino acids, including proline, lysine and tryptophan; the leaves accumulated higher levels of terpenoids, vitamins and flavonoids, and stems contained higher levels of carbohydrate compounds. Based on the role of acetyl coenzyme A, the distribution and possible exchange mechanism of metabolites in leaves, stems and flowers of P. cablin were mapped for the first time, laying the groundwork for future research on the metabolites in P. cablin and their regulatory role.

Factors associated with psychosocial adjustment in working-age colorectal cancer survivors: A cross-sectional study.

Objective: This study aimed to describe the level of psychosocial adjustment and identify factors associated with psychosocial adjustment in working-age colorectal cancer survivors. Methods: This cross-sectional study involved 212 colorectal cancer survivors visiting a cancer clinic at a specialized oncology hospital in China. Socio-demographic characteristics, disease-related characteristics, status of returning to work, Work Ability Index scores, M. D. Anderson Symptom Inventory for Gastrointestinal Cancer scores, and self-reported Psychological Adjustment to Illness Scale scores were collected from all participants. Data analyses included descriptive statistics, independent t-test, one-way analysis of variance, correlation analysis, and multiple linear regression analysis, which were performed using the Statistical Package for the Social Sciences version 25.0 (IBM Corporation, Armonk, NY, USA). Results: Participants reported a medium level of psychosocial maladjustment (35.73 â€‹± â€‹19.68), with 19.3% of participants experiencing severe maladjustment, 29.7% experiencing moderate maladjustment, and 50.9% experiencing mild maladjustment, respectively. Age, gender, marital status, having a child, education level, having a stoma, comorbidities, return to work, work ability, and symptom distress were entered into a multiple linear regression analysis. The strongest factor influencing the level of psychosocial adjustment was work ability (ߠ​= â€‹-0.393, P â€‹< â€‹0.001), followed by symptom distress (ߠ​= â€‹0.380, P â€‹< â€‹0.001) and an education level of college or above (ߠ​= â€‹0.150, P â€‹= â€‹0.027). These variables accounted for 46.1% of the variance in psychosocial adjustment. Conclusions: Colorectal cancer survivors with low work ability, high symptom distress, and an education level of college or above are at a high risk for psychosocial maladjustment. Nursing interventions for psychosocial adjustment should attach increased importance to the work status and symptom distress of colorectal cancer survivors.