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Transcriptional regulation of Rankl by Txnip-Ecd in aging and diabetic related osteoporosis Txnip-Ecd对Rankl在衰老和糖尿病相关性骨质疏松中的转录调控
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-16 DOI: 10.1016/j.jare.2025.01.027
Xiankun Cao, Kexin Liu, Jinbo Yuan, Qi Hua, Kewei Rong, Tangjun Zhou, Wenxin He, Yichuan Pang, Xiao Yang, Yating Yu, Pu Zhang, Peixiang Ma, Yu Cao, Jie Zhao, Grant Morahan, Jiake Xu, An Qin

Introduction

Bone homeostasis between osteoclast bone resorption and osteoblastic bone formation is tightly regulated by a series of factors such as the receptor activator of nuclear factor-κB ligand (RANKL). Denosumab that neutralizes RANKL is effective and widely applied in the treatment of postmenopausal osteoporosis. However, factors that participated in the RANKL-related bone remodeling process in primary and secondary osteoporosis are less known.

Objectives

Revealing the novel transcriptional regulatory mechanism of RANKL is of great significance for the treatment of osteoporosis.

Methods

After differential expression genes (DEGs) intersection and screening, we generated Thioredoxin-interacting protein (Txnip) bone marrow-derived mesenchymal stromal cells (BMSCs) genetic knockout mice and performed bone histomorphometry and histological analysis. RNA-Sequencing, Western blotting and immunofluorescence staining verified Rankl downregulation. Co-immunoprecipitation and immunofluorescence staining were used for Rankl regulation mechanism exploration. A specific inhibitor was selected for treatment effect verification.

Results

Txnip knockout in BMSCs impaired its osteogenic differentiation, suppressed Rankl expression and subsequent osteoclast formation and thus led to increased bone mass. The regulatory function of Txnip on Rankl expression was revealed for the first time through the novel transcription-related Ecdysoneless (Ecd)-P300 axis. Pharmacological inhibition of Txnip can effectively prevent bilateral ovariectomy (OVX)-induced osteoporosis.

Conclusions

Inhibition of Txnip is an alternative way to suppress Rankl-mediated osteoblast and osteoclast crosstalk. This interesting finding rendered Txnip an ideal therapeutic target for the treatment of both ovariectomy-induced and diabetes-induced osteoporosis.
破骨细胞骨吸收与成骨细胞骨形成之间的骨稳态受核因子-κB配体受体激活因子(RANKL)等一系列因素的严格调控。中和RANKL的Denosumab有效且广泛应用于绝经后骨质疏松症的治疗。然而,在原发性和继发性骨质疏松症中参与rankl相关骨重塑过程的因素尚不清楚。目的揭示RANKL新的转录调控机制,对骨质疏松症的治疗具有重要意义。方法通过差异表达基因(DEGs)交叉筛选,制备硫氧还蛋白相互作用蛋白(Txnip)骨髓间充质基质细胞(BMSCs)基因敲除小鼠,进行骨组织形态测定和组织学分析。rna测序、Western blotting和免疫荧光染色证实Rankl下调。采用免疫共沉淀法和免疫荧光染色法探讨Rankl调控机制。选择特异性抑制剂进行治疗效果验证。结果敲除stxnip抑制骨髓间充质干细胞成骨分化,抑制Rankl表达和破骨细胞形成,导致骨量增加。通过新的转录相关Ecdysoneless (Ecd)-P300轴,首次揭示了Txnip对Rankl表达的调控作用。Txnip的药理抑制作用可有效预防双侧卵巢切除术(OVX)所致骨质疏松症。结论抑制Txnip是抑制rankl介导的成骨细胞和破骨细胞串扰的另一种途径。这一有趣的发现使Txnip成为治疗卵巢切除术和糖尿病引起的骨质疏松症的理想治疗靶点。
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引用次数: 0
Post-transcriptional and post-translational regulation of anthocyanin biosynthesis in sweetpotato by Ib-miR2111 and IbKFB: Implications for health promotion Ib-miR2111和IbKFB对甘薯花青素生物合成的转录后和翻译后调控:对健康促进的影响
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-16 DOI: 10.1016/j.jare.2025.01.023
Ruimin Tang, Cailiang Zhao, Jingjian Dong, Xiayu Liu, Lu Chang, Jianghui Li, Haitao Dong, Yuntao Lv, Zhuang Luo, Meiling Wu, Shan Shen, Qianwen Shan, Yuan Li, Qijun Chen, Runzhi Li, Liheng He, Qinghe Cao, Guiliang Tang, Xiaoyun Jia

Introduction

Sweetpotato (Ipomoea batatas (L.) Lam.) is a genetically intricate hexaploid crop. The purple-fleshed variety, enriched with anthocyanin pigments, is an outstanding source for creating high-value functional products. Previous research on anthocyanin biosynthesis has primarily focused on the above-ground plant parts at the transcriptional level. However, the regulatory mechanisms underlying anthocyanin accumulation in underground tuberous roots of sweetpotato remain largely unexplored.

Objectives

This study aimed to elucidate the post-transcriptional and post-translational mechanisms of Ib-miR2111 and its target gene IbKFB in anthocyanin synthesis in sweetpotato.

Methods

Genetic manipulation techniques were used to validate the function of Ib-miR2111 and IbKFB in anthocyanin biosynthesis in sweetpotato. To investigate how IbKFB works, a series of protein interaction assays, including yeast two-hybrid (Y2H), bimolecular fluorescence complementation (BiFC), GST pull-down, co-immunoprecipitation (Co-IP), and ubiquitination, were conducted. Additionally, the impact of anthocyanin extracts from the genetically modified sweetpotato lines on inflammatory cells morphology, cytokine expression, and cell proliferation were evaluated using in vitro assays.

Results

Purple-fleshed sweetpotato (PFSP) lines exhibited elevated Ib-miR2111 expression compared to white-fleshed sweetpotato (WFSP), with an inverse expression pattern in IbKFB. Genetic manipulations, including overexpression, CRISPR/Cas9 knockouts, and targeted mutations, confirmed their critical roles in anthocyanin modulation. Furthermore, IbKFB’s interactions and ubiquitination with phenylalanine ammonia-lyase 1 (IbPAL1) and glyceraldehyde-3-phosphate dehydrogenase 1 (IbGAPCp1) were elucidated, revealing intricate regulatory mechanisms. Enhanced anthocyanin content showed significant effects on inflammatory cell morphology, cytokine expression, and cell proliferation.

Conclusion

This study provides new insights into the regulatory mechanisms of Ib-miR2111 and IbKFB in anthocyanin biosynthesis and suggests potential health benefits of anthocyanin-rich sweetpotatoes.
导言甘薯(Ipomoea batatas (L.) Lam.)是一种基因复杂的六倍体作物。其紫色果肉品种富含花青素色素,是生产高价值功能性产品的绝佳原料。以往对花青素生物合成的研究主要集中在植物地上部分的转录水平。本研究旨在阐明 Ib-miR2111 及其靶基因 IbKFB 在甘薯花青素合成中的转录后和翻译后机制。方法利用遗传操作技术验证 Ib-miR2111 和 IbKFB 在甘薯花青素生物合成中的功能。为了研究 IbKFB 如何发挥作用,研究人员进行了一系列蛋白质相互作用试验,包括酵母双杂交(Y2H)、双分子荧光互补(BiFC)、GST 牵引、共免疫沉淀(Co-IP)和泛素化。此外,还利用体外试验评估了转基因甘薯品系的花青素提取物对炎症细胞形态、细胞因子表达和细胞增殖的影响。结果与白肉甘薯(WFSP)相比,紫肉甘薯(PFSP)品系的 Ib-miR2111 表达升高,而 IbKFB 的表达模式则相反。基因操作(包括过表达、CRISPR/Cas9 基因敲除和靶向突变)证实了它们在花青素调节中的关键作用。此外,还阐明了 IbKFB 与苯丙氨酸氨解酶 1(IbPAL1)和甘油醛-3-磷酸脱氢酶 1(IbGAPCp1)的相互作用和泛素化,揭示了错综复杂的调控机制。结论 本研究为 Ib-miR2111 和 IbKFB 在花青素生物合成中的调控机制提供了新的见解,并提出了富含花青素的甘薯对健康的潜在益处。
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引用次数: 0
Versatile platforms of mussel-inspired agarose scaffold for cell cultured meat 贻贝启发琼脂糖支架细胞培养肉的多功能平台
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-16 DOI: 10.1016/j.jare.2025.01.024
Kaihao You, Lianghua Xie, Jiaxin Li, Qingying Liu, Lenan Zhuang, Wei Chen

Introduction

Biomaterial scaffolds are critical for cell cultured meat production. polysaccharide scaffolds lack essential animal cell adhesion receptors, leading to significant challenges in cell proliferation and myogenic differentiation. Thus, enhancing cell adhesion and growth on polysaccharide scaffolds is strongly required to supply the gaps in cell-cultured meat production.

Objectives

This study aims to develop a multifunctional cell-responsive hydrogel scaffold for the in vitro production of myofibers and structured cell cultured meat through a “cell adhesion-proliferation-differentiation” strategy.

Methods

A polydopamine coating was applied to agarose hydrogel scaffolds using a dipping technique. The capability of scaffolds for myofiber preparation was assessed by evaluating cell adhesion, proliferation, and myogenic differentiation. Utilizing isolated porcine skeletal muscle satellite cells (PSMSCs), the feasibility of structured cell cultured pork tissue supported by agarose hydrogel film scaffolds was further investigated through three-dimensional imaging and scanning electron microscopy analysis. The physicochemical properties of the structured cell cultured pork tissue were evaluated through staining and texture analysis.

Results

The incorporation of a polydopamine coating facilitated a remarkable 100 % cell adhesion rate on agarose hydrogel scaffolds, which also demonstrated reusability. The agarose hydrogel scaffolds retained adequate mechanical properties, enabling the adhered cells to proliferate effectively and differentiate into myofiber. Moreover, isolated PSMSCs maintained growth potential on the agarose hydrogel scaffolds, thereby imparting the scaffolds with the ability to generate substantial quantities of multinucleated myofibers. Furthermore, we established a structured cell culture pork meat model, characterized by high-density myofibers and agarose hydrogel film scaffolds, which exhibited the texture and color typical of real pork.

Conclusion

The innovative agarose/polydopamine scaffold functions as a multifunctional platform for cell culture, offering novel avenues for the diversification and scalable production of cultured meat, and promising significant reductions in production costs for cell cultured meat.
多糖支架缺乏必要的动物细胞粘附受体,导致细胞增殖和成肌分化面临重大挑战。本研究旨在通过 "细胞粘附-增殖-分化 "策略,开发一种多功能细胞响应水凝胶支架,用于体外生产肌纤维和结构化细胞培养肉。通过评估细胞粘附、增殖和成肌分化情况,评估了支架制备肌纤维的能力。利用分离的猪骨骼肌卫星细胞(PSMSCs),通过三维成像和扫描电子显微镜分析,进一步研究了由琼脂糖水凝胶膜支架支撑的猪肉组织结构化细胞培养的可行性。结果聚多巴胺涂层的加入使琼脂糖水凝胶支架上的细胞粘附率达到了显著的 100%,这也证明了其可重复使用性。琼脂糖水凝胶支架保持了足够的机械性能,使粘附的细胞能有效增殖并分化成肌纤维。此外,分离出的 PSMSCs 还能在琼脂糖水凝胶支架上保持生长潜能,从而赋予支架生成大量多核肌纤维的能力。结论 创新的琼脂糖/多巴胺支架可作为细胞培养的多功能平台,为培养肉的多样化和规模化生产提供了新途径,并有望显著降低细胞培养肉的生产成本。
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引用次数: 0
Mechanistic insights into ferroptosis and apoptosis pathways: Synergistic effects of multi-organ toxicity and transgenerational effects induced by co-exposure of epoxiconazole and aflatoxin B1 in zebrafish 铁死亡和细胞凋亡途径的机制研究:环氧康唑和黄曲霉毒素B1对斑马鱼多器官毒性的协同效应和跨代效应
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-13 DOI: 10.1016/j.jare.2025.01.020
Ruike Wang, Qi Zhang, Gang Chen, Ruirui Kou, Cuiqin Zhang, Yanhua Wang, Jing Wang, Yueqing Huang, Chen Chen

Introduction

In the environment, mycotoxins and fungicides frequently coexist, potentially causing synergistic risks to organisms. Epoxiconazole (EPO) and aflatoxin B1 (AFB1) are a common fungicide and mycotoxins, respectively, which are widely present in the environment and have toxic effects on multiple organs once entering the organism, but it is still unclear whether the co-exposure has a synergistic toxic effect.

Objectives

This study delves into the molecular mechanisms underlying the co-exposure to EPO and AFB1, emphasizing multi-organ toxicity in female zebrafish (F0 generation) and potential transgenerational impacts on the offspring embryos (F1 generation) through multi-omics approaches.

Results

Findings indicate that exposure to either EPO or AFB1, individually or combined, intensified intestinal pathological damage, decreased the expression of tight junction proteins, altered gut microbiota composition, and induced intestinal inflammation, with co-exposure causing more severe effects. RNA-seq analysis revealed an enrichment of ferroptosis and apoptosis pathways in the liver and ovaries of F0 zebrafish. Co-exposure markedly altered the expression of associated molecules, exacerbating pathological damage in these organs. Molecular docking studies revealed that AFB1 exhibited lower binding energies to Caspase3, GPX4 and IL-1β compared to EPO, suggesting that it may have a higher binding capacity. Furthermore, both single and combined exposures modified the expression of molecules related to apoptosis, inflammatory response, and ferroptosis in unexposed F1 embryos, with co-exposure demonstrating more significant biological effects, thereby confirming transgenerational toxicity.

Conclusion

The present study provides preliminary evidence on the potential mechanisms of combined exposure-induced multi-organ toxicity, highlighting ferroptosis of the liver and apoptosis of the ovary as key pathways. These findings provide new perspectives and methods for risk assessment of multiple environmental pollutants.
在环境中,真菌毒素和杀菌剂经常共存,可能对生物体造成协同风险。环氧康唑(Epoxiconazole, EPO)和黄曲霉毒素B1(黄曲霉毒素B1, AFB1)分别是常见的杀菌剂和真菌毒素,它们广泛存在于环境中,一旦进入机体就会对多个器官产生毒性作用,但共同暴露是否具有协同毒性作用尚不清楚。目的本研究通过多组学方法探讨EPO和AFB1共同暴露的分子机制,强调雌性斑马鱼(F0代)的多器官毒性和对后代胚胎(F1代)的潜在跨代影响。结果表明,EPO或AFB1单独或联合暴露均可加重肠道病理损伤,降低紧密连接蛋白的表达,改变肠道菌群组成,诱发肠道炎症,其中共暴露的影响更为严重。RNA-seq分析显示,F0斑马鱼肝脏和卵巢中铁下垂和凋亡通路富集。共暴露显著改变了相关分子的表达,加剧了这些器官的病理损伤。分子对接研究发现,AFB1与Caspase3、GPX4和IL-1β的结合能较EPO低,提示其可能具有更高的结合能力。此外,在未暴露的F1胚胎中,单独暴露和联合暴露都改变了与细胞凋亡、炎症反应和铁凋亡相关的分子的表达,而共同暴露显示出更显著的生物学效应,从而证实了跨代毒性。结论本研究为暴露联合诱导多器官毒性的潜在机制提供了初步证据,强调了肝脏铁下垂和卵巢凋亡是主要途径。这些发现为多种环境污染物的风险评价提供了新的视角和方法。
{"title":"Mechanistic insights into ferroptosis and apoptosis pathways: Synergistic effects of multi-organ toxicity and transgenerational effects induced by co-exposure of epoxiconazole and aflatoxin B1 in zebrafish","authors":"Ruike Wang, Qi Zhang, Gang Chen, Ruirui Kou, Cuiqin Zhang, Yanhua Wang, Jing Wang, Yueqing Huang, Chen Chen","doi":"10.1016/j.jare.2025.01.020","DOIUrl":"https://doi.org/10.1016/j.jare.2025.01.020","url":null,"abstract":"<h3>Introduction</h3>In the environment, mycotoxins and fungicides frequently coexist, potentially causing synergistic risks to organisms. Epoxiconazole (EPO) and aflatoxin B1 (AFB1) are a common fungicide and mycotoxins, respectively, which are widely present in the environment and have toxic effects on multiple organs once entering the organism, but it is still unclear whether the co-exposure has a synergistic toxic effect.<h3>Objectives</h3>This study delves into the molecular mechanisms underlying the co-exposure to EPO and AFB1, emphasizing multi-organ toxicity in female zebrafish (F0 generation) and potential transgenerational impacts on the offspring embryos (F1 generation) through multi-omics approaches.<h3>Results</h3>Findings indicate that exposure to either EPO or AFB1, individually or combined, intensified intestinal pathological damage, decreased the expression of tight junction proteins, altered gut microbiota composition, and induced intestinal inflammation, with co-exposure causing more severe effects. RNA-seq analysis revealed an enrichment of ferroptosis and apoptosis pathways in the liver and ovaries of F0 zebrafish. Co-exposure markedly altered the expression of associated molecules, exacerbating pathological damage in these organs. Molecular docking studies revealed that AFB1 exhibited lower binding energies to Caspase3, GPX4 and IL-1β compared to EPO, suggesting that it may have a higher binding capacity. Furthermore, both single and combined exposures modified the expression of molecules related to apoptosis, inflammatory response, and ferroptosis in unexposed F1 embryos, with co-exposure demonstrating more significant biological effects, thereby confirming transgenerational toxicity.<h3>Conclusion</h3>The present study provides preliminary evidence on the potential mechanisms of combined exposure-induced multi-organ toxicity, highlighting ferroptosis of the liver and apoptosis of the ovary as key pathways. These findings provide new perspectives and methods for risk assessment of multiple environmental pollutants.","PeriodicalId":14952,"journal":{"name":"Journal of Advanced Research","volume":"89 1","pages":""},"PeriodicalIF":10.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanism and regulation of iron absorption throughout the life cycle 整个生命周期铁吸收的机制和调控
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-13 DOI: 10.1016/j.jare.2025.01.002
Lili Qiu, David M. Frazer, Mengxiao Hu, Rui Song, Xiaoxue Liu, Xiyu Qin, Jie Ma, Jun Zhou, Zidi Tan, Fazheng Ren, Xiaoyu Wang, James F. Collins

Background

Iron plays a crucial role through various life stages of human. Iron homeostasis is primarily regulated by iron absorption which is mediated via divalent metal-ion transporter 1 (DMT1), and iron export protein ferroportin (FPN), as there is no active pathway for iron excretion from the body. Recent studies have shown that the magnitude of iron absorption changes through various life stages to meet changing iron requirements.

Aim of review

This review aims to provide an overview of recent researches on the regulation of iron absorption throughout mammalian life cycle, with the potential to reveal novel molecules and pathways at special stage of life. Such insights may pave the way for new treatments for disorders associated with aberrant iron homeostasis in the future.

Key scientific concepts of review

This review first summarize the mechanism and regulation of iron absorption throughout various life stages, highlighting that regulatory mechanisms have developed to precisely align iron absorption to iron requirements. In adults, iron absorption is enhanced when body is deficient of iron, conversely, iron absorption is reduced when iron demand decreases via systemic regulator Hepcidin and cellular regulation. In the elderly, age-related inflammation, hormonal changes, and chronic diseases may affect the production of Hepcidin, affecting iron absorption. In infants, intestinal iron absorption and its regulatory mechanism are different from that in adults and there might be an alternative pathway independent of DMT1 and FPN due to high iron absorption. Unique to the fetus, iron is absorbed from maternal stores for its own use through the placenta and is regulated by maternal iron status. This review also proposes directions for further studies, offering promising avenues for developing new treatments for disorders associated with aberrant iron homeostasis.
在人的各个人生阶段,铁起着至关重要的作用。铁稳态主要由铁吸收调节,铁吸收通过二价金属离子转运蛋白1 (DMT1)和铁输出蛋白铁转运蛋白(FPN)介导,因为铁从体内排泄没有活性途径。最近的研究表明,在不同的生命阶段,铁的吸收幅度会发生变化,以满足不断变化的铁需求。本文综述了哺乳动物全生命周期铁吸收调控的最新研究进展,以期揭示生命特殊阶段的新分子和新途径。这些见解可能为未来与异常铁稳态相关的疾病的新治疗铺平道路。本文首先总结了生命各阶段铁吸收的机制和调控,强调了铁吸收与铁需求精确匹配的调控机制的发展。成人体内缺铁时,铁吸收增强;反之,当铁需求减少时,通过全身调节因子Hepcidin和细胞调节,铁吸收减少。在老年人中,与年龄相关的炎症、激素变化和慢性疾病可能影响Hepcidin的产生,影响铁的吸收。婴儿肠道铁吸收及其调控机制与成人不同,由于铁的高吸收量,可能存在独立于DMT1和FPN的替代途径。胎儿特有的铁元素通过胎盘从母体中吸收供自身使用,并受母体铁元素状态的调节。本文还提出了进一步研究的方向,为开发与异常铁稳态相关的疾病的新治疗方法提供了有希望的途径。
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引用次数: 0
Mycotoxin toxicity and its alleviation strategy on female mammalian reproduction and fertility 霉菌毒素对雌性哺乳动物生殖和生育的毒性及其缓解策略
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-13 DOI: 10.1016/j.jare.2025.01.022
Ping-Shuang Lu, Shao-Chen Sun

Background

Mycotoxin, a secondary metabolite of fungus, found worldwide and concerning in crops and food, causing multiple acute and chronic toxicities. Its toxic profile includes hepatotoxicity, carcinogenicity, teratogenicity, estrogenicity, immunotoxicity, and neurotoxicity, leading to deleterious impact on human and animal health. Emerging evidence suggests that it adversely affects perinatal health, progeny by its ability to cross placental barriers.

Aim of Review

Due to its wide occurrence and potential toxicity on reproductive health, it is essential to understand the mechanisms of mycotoxin-related reproductive toxicity. This review summarizes the toxicities and mechanisms of mycotoxin on maternal and offspring reproduction among mammalian species. Approaches for effective mycotoxin alleviation are also discussed, providing strategies against mycotoxin contamination.

Key Scientific Concepts of Review

The profound mycotoxin toxicities in female mammalian reproduction affect follicle assembly, embryo development, and fetus growth, thereby decreasing offspring fertility. Factors from endocrine system such as hypothalamic-pituitary–gonadal axis and gut-ovarian axis, placenta ABC transporters, organelle and cytoskeleton dynamics, cell cycle control, genomic stability, and redox homeostasis are found to be closely related to mycotoxin toxicities. Approaches from physical, chemical, biological, and supplementation of natural antioxidants are discussed for the mycotoxin elimination, while their applications are not widespread. Available ways for mycotoxin and its toxicities alleviation need further study. Since a species-, time-, and dose-specific response might exist in mycotoxin toxicities, more consideration should be given to the protocols for mycotoxin toxicity studies, such as experimental animal models, exposure duration, and dosage. Specific mechanism for mycotoxin, especially form a molecular biology perspective, could be investigated with multi-omics technologies and advanced imaging techniques. Mass spectrometry with algorithms may provide more accurate exposure assessments, and be further helpful to identify the high-risk individuals in the future.
背景霉菌毒素是真菌的一种次级代谢产物,世界各地都有发现,在农作物和食物中的含量也很高,会引起多种急性和慢性中毒症状。其毒性包括肝毒性、致癌性、致畸性、雌激素毒性、免疫毒性和神经毒性,对人类和动物的健康造成有害影响。新的证据表明,霉菌毒素能够穿过胎盘屏障,从而对围产期健康和后代产生不利影响。本综述总结了霉菌毒素对哺乳动物母体和后代生殖的毒性和机制。综述的主要科学概念霉菌毒素对雌性哺乳动物生殖系统的严重毒性会影响卵泡的形成、胚胎的发育和胎儿的成长,从而降低后代的生育能力。研究发现,下丘脑-垂体-性腺轴和肠道-卵巢轴等内分泌系统、胎盘ABC转运体、细胞器和细胞骨架动力学、细胞周期控制、基因组稳定性和氧化还原平衡等因素与霉菌毒素毒性密切相关。本文讨论了消除霉菌毒素的物理、化学、生物和补充天然抗氧化剂等方法,但这些方法的应用并不广泛。减轻霉菌毒素及其毒性的现有方法需要进一步研究。由于霉菌毒素毒性可能存在物种、时间和剂量特异性反应,因此应更多地考虑霉菌毒素毒性研究的方案,如实验动物模型、接触时间和剂量。霉菌毒素的具体机制,特别是分子生物学方面的机制,可以通过多组学技术和先进的成像技术进行研究。质谱分析法与算法可提供更准确的暴露评估,并进一步帮助识别未来的高危人群。
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引用次数: 0
Baicalin attenuates the immune escape of oral squamous cell carcinoma by reducing lactate accumulation in tumor microenvironment 黄芩苷通过减少口腔鳞状细胞癌微环境中乳酸的积累而减弱其免疫逃逸
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-13 DOI: 10.1016/j.jare.2025.01.021
Yameng Cui, Jingwen Liu, Xi Wang, Yulin Wu, Yunhan Chang, Xin Hu, Wei Zhao

Introduction

The acidic microenvironment caused by excessive lactate accumulation could inhibit immune lymphocytes antitumor activity and promote the immune escape of tumor cells. Baicalin is an active flavonoid isolated from Scutellaria baicalensis Georgi, a traditional Chinese medicinal herb with antioxidant and anti-inflammatory properties.

Objectives

The present study aims to investigate whether and how baicalin inhibits oral squamous cell carcinoma (OSCC) acidic microenvironment and attenuates immune escape.

Methods

Baicalin was dose-dependently administrated to OSCC cells (0–50 μmol/L). Co-culture system was constructed by OSCC cells and activated PBMCs. The proliferation and migration of OSCC cells were tested by CCK-8, colony formation, EdU, transwell assays. The cytokines were tested by ELISA kits. Mechanistical exploration was verified by RNA immunoprecipitation (RIP), fluorescence in situ hybridization (FISH) and RNA stability assays.

Results

Results indicated that baicalin dose-dependently repressed the proliferation and migration of OSCC cells, and strengthened the antitumor immune activity of activated PBMCs to OSCC cells. Moreover, baicalin repressed the lactate accumulation, acidification and m6A modification level of OSCC cells. Molecular docking and MeRIP-Seq revealed that baicalin targeted LDHA via m6A-IGF2BP3-dependent manner to reduce lactate accumulation and PD-L1 expression in co-culture microenvironment.

Conclusion

This study revealed the anti-tumor activity of baicalin for OSCC by reducing lactate accumulation and attenuating the immune escape in tumor microenvironment, which provided a novel insight to improve our understanding in the treatment of traditional Chinese medicine on human cancer.
过量乳酸积累引起的酸性微环境可抑制免疫淋巴细胞抗肿瘤活性,促进肿瘤细胞的免疫逃逸。黄芩苷是从黄芩中分离得到的一种活性类黄酮,黄芩是一种具有抗氧化和抗炎作用的传统中药。目的探讨黄芩苷对口腔鳞状细胞癌(OSCC)酸性微环境的抑制作用及对免疫逃逸的抑制作用。方法黄芩苷以0 ~ 50 μmol/L剂量依赖性给药于OSCC细胞。将OSCC细胞与活化的pbmc细胞构建共培养体系。采用CCK-8、集落形成、EdU、transwell法检测OSCC细胞的增殖和迁移。采用ELISA试剂盒检测细胞因子。通过RNA免疫沉淀(RIP)、荧光原位杂交(FISH)和RNA稳定性实验验证了机制探索。结果黄芩苷呈剂量依赖性地抑制OSCC细胞的增殖和迁移,增强活化pbmc对OSCC细胞的抗肿瘤免疫活性。黄芩苷对OSCC细胞乳酸积累、酸化及m6A修饰水平均有抑制作用。分子对接和MeRIP-Seq分析显示,黄芪苷通过m6a - igf2bp3依赖的方式靶向LDHA,减少共培养微环境中乳酸积累和PD-L1的表达。结论黄芩苷通过降低肿瘤微环境中乳酸的积累和免疫逃逸,对OSCC具有抗肿瘤活性,为提高我们对中药治疗人类肿瘤的认识提供了新的思路。
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引用次数: 0
Activation of sphingosine-1-phosphate receptor 2 (S1PR2) upregulates dihydropyrimidine dehydrogenase (DPD) expression in colon cancer cells 激活鞘氨醇-1-磷酸受体 2 (S1PR2) 可上调结肠癌细胞中二氢吡啶脱氢酶 (DPD) 的表达
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-13 DOI: 10.1016/j.jare.2025.01.006
Zhi-Kun Guo, Xin-Feng Wu, Ming-Yong Tan, Wei-Shi Liang, Yu-Meng Yang, Zhen-Zhen Chu, Rui Xu, Ke-Qin Li, Yu-Yao Cheng, Ying-Zhi Zhang, Yu-Hang Zhang, Yong Hai, Shu-Xiang Cui, Xian-Jun Qu

Introduction

Dihydropyrimidine dehydrogenase (DPD) is a major determinant of cancer 5-fluorouracyl (5-FU) resistance via its direct degradation. However, the mechanisms of tumoral DPD upregulation have not been fully understood.

Objectives

This study aimed to explore the role of S1PR2 in the regulation of tumoral DPD expression, identifying S1PR2 as the potential target for reversing 5-FU resistance.

Methods

Western blot was used to analyze S1PR2 expression in cultured cancer cells and human colorectal cancer (CRC) tissues. 5-FU resistance was estimated in mouse xenografts of HT-29sh-S1PR2 and SW480S1PR2 cells. HPLC-UV was used to measure 5-FU levels in the xenografts. Chromatin immunoprecipitation (ChIP) was used to analyze the binding of YAP1/TEAD1 to the TWIST1 promoter. A luciferase reporter was used to analyze the binding of TWIST1 to the DPYD promoter.

Results

S1PR2 was highly expressed in cancer cell lines and human CRC tissues. Activation of S1PR2 upregulated DPD expression, leading to 5-FU resistance. Mechanistically, activated S1PR2 upregulated nuclear TWIST1 by activating the Hippo/TEAD1-TWIST1 pathway. Nuclear TWIST1 interacted with the JMJD3-RNA Pol II complex, resulting in the interaction of TWIST1 with the DPYD promoter, thus increasing H3K27me3-enriched DPYD transcription. These findings were confirmed in xenografted human colon cancer cells in nude mice. Transfection with an S1PR2 expression vector led to the upregulation of DPD, blunting the sensitivity of SW480S1PR2 cells to 5-FU by 45.14 %. Conversely, knockdown of S1PR2 resulted in a decrease of DPD, thus increasing the sensitivity of HT-29sh-S1PR2 cells to 5-FU by 62.12 %. Molecular analysis of these xenografts confirmed the role of S1PR2 in upregulating DPD expression by activating the Hippo/TEAD1-JMJD3 pathway.

Conclusions

Activation of S1PR2 upregulated DPD expression by activating the Hippo/TWIST1-JMJD3 pathway. S1PR2 is therefore a potential target for novel inhibitors that may reverse 5-FU resistance in cancer therapy.
导言二氢嘧啶脱氢酶(DPD)通过直接降解5-氟尿嘧啶(5-FU)而成为癌症耐药性的主要决定因素。本研究旨在探索 S1PR2 在调控肿瘤 DPD 表达中的作用,确定 S1PR2 为逆转 5-FU 耐药性的潜在靶点。方法用 Western 印迹分析 S1PR2 在培养的癌细胞和人类结直肠癌(CRC)组织中的表达。在小鼠异种移植的 HT-29sh-S1PR2 和 SW480S1PR2 细胞中评估了 5-FU 抗性。采用高效液相色谱-紫外法测定异种移植物中的 5-FU 水平。染色质免疫沉淀(ChIP)用于分析 YAP1/TEAD1 与 TWIST1 启动子的结合。结果S1PR2在癌细胞系和人类 CRC 组织中高表达。激活 S1PR2 会上调 DPD 的表达,从而导致 5-FU 抗性。从机制上讲,活化的 S1PR2 通过激活 Hippo/TEAD1-TWIST1 通路上调核 TWIST1。核 TWIST1 与 JMJD3-RNA Pol II 复合物相互作用,导致 TWIST1 与 DPYD 启动子相互作用,从而增加了 H3K27me3 富集的 DPYD 转录。这些发现在裸鼠异种移植的人类结肠癌细胞中得到了证实。转染 S1PR2 表达载体会导致 DPD 上调,使 SW480S1PR2 细胞对 5-FU 的敏感性降低 45.14%。相反,敲除 S1PR2 会导致 DPD 下降,从而使 HT-29sh-S1PR2 细胞对 5-FU 的敏感性提高 62.12%。对这些异种移植的分子分析证实了 S1PR2 在通过激活 Hippo/TEAD1-JMJD3 通路上调 DPD 表达中的作用。因此,S1PR2 是新型抑制剂的潜在靶点,可逆转癌症治疗中的 5-FU 抗药性。
{"title":"Activation of sphingosine-1-phosphate receptor 2 (S1PR2) upregulates dihydropyrimidine dehydrogenase (DPD) expression in colon cancer cells","authors":"Zhi-Kun Guo, Xin-Feng Wu, Ming-Yong Tan, Wei-Shi Liang, Yu-Meng Yang, Zhen-Zhen Chu, Rui Xu, Ke-Qin Li, Yu-Yao Cheng, Ying-Zhi Zhang, Yu-Hang Zhang, Yong Hai, Shu-Xiang Cui, Xian-Jun Qu","doi":"10.1016/j.jare.2025.01.006","DOIUrl":"https://doi.org/10.1016/j.jare.2025.01.006","url":null,"abstract":"<h3>Introduction</h3>Dihydropyrimidine dehydrogenase (DPD) is a major determinant of cancer 5-fluorouracyl (5-FU) resistance via its direct degradation. However, the mechanisms of tumoral DPD upregulation have not been fully understood.<h3>Objectives</h3>This study aimed to explore the role of S1PR2 in the regulation of tumoral DPD expression, identifying S1PR2 as the potential target for reversing 5-FU resistance.<h3>Methods</h3>Western blot was used to analyze S1PR2 expression in cultured cancer cells and human colorectal cancer (CRC) tissues. 5-FU resistance was estimated in mouse xenografts of HT-29<sup>sh-S1PR2</sup> and SW480<sup>S1PR2</sup> cells. HPLC-UV was used to measure 5-FU levels in the xenografts. Chromatin immunoprecipitation (ChIP) was used to analyze the binding of YAP1/TEAD1 to the <em>TWIST1</em> promoter. A luciferase reporter was used to analyze the binding of TWIST1 to the <em>DPYD</em> promoter.<h3>Results</h3>S1PR2 was highly expressed in cancer cell lines and human CRC tissues. Activation of S1PR2 upregulated DPD expression, leading to 5-FU resistance. Mechanistically, activated S1PR2 upregulated nuclear TWIST1 by activating the Hippo/TEAD1-TWIST1 pathway. Nuclear TWIST1 interacted with the JMJD3-RNA Pol II complex, resulting in the interaction of TWIST1 with the <em>DPYD</em> promoter, thus increasing H3K27me3-enriched <em>DPYD</em> transcription. These findings were confirmed in xenografted human colon cancer cells in nude mice. Transfection with an S1PR2 expression vector led to the upregulation of DPD, blunting the sensitivity of SW480<sup>S1PR2</sup> cells to 5-FU by 45.14 %. Conversely, knockdown of S1PR2 resulted in a decrease of DPD, thus increasing the sensitivity of HT-29<sup>sh-S1PR2</sup> cells to 5-FU by 62.12 %. Molecular analysis of these xenografts confirmed the role of S1PR2 in upregulating DPD expression by activating the Hippo/TEAD1-JMJD3 pathway.<h3>Conclusions</h3>Activation of S1PR2 upregulated DPD expression by activating the Hippo/TWIST1-JMJD3 pathway. S1PR2 is therefore a potential target for novel inhibitors that may reverse 5-FU resistance in cancer therapy.","PeriodicalId":14952,"journal":{"name":"Journal of Advanced Research","volume":"4 1","pages":""},"PeriodicalIF":10.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CDK8 mediated inflammatory microenvironment aggravates osteoarthritis progression CDK8介导的炎症微环境可加重骨关节炎的进展
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-12 DOI: 10.1016/j.jare.2025.01.017
Zhongnan Lin, Yining Xu, Hongyi Jiang, Wen Zeng, Yuhan Wang, Liang Zhu, Chihao Lin, Chao Lou, Hanting Shen, Han Ye, Yean Gu, Huachen Yu, Xiaoyun Pan, Lin Zheng

Introduction

Cyclin-Dependent Kinase 8 (CDK8), a CDK family member, regulates the development of inflammatory processes through transcriptional activation. The involvement of CDK8 in osteoarthritis (OA) progression is not yet understood.

Objectives

This study aims to investigate whether CDK8, through its transcriptional regulatory functions, collaborates with NF-κB in chondrocytes to regulate the transcription of senescence-associated secretory phenotype (SASP) genes, thereby exacerbating the inflammatory microenvironment in the progression of osteoarthritis (OA), and to explore the specific mechanisms involved.

Methods

The effects of CDK8 silencing or overexpression will be assessed by measuring OA pathological markers through H&E staining, immunoblotting, Western blot, qRT-PCR, immunofluorescence and ELISA. The DMM surgery mouse model will be used as the OA model, and the PAM and Von Frey tests will be employed to measure the pain threshold in mice. Luciferase and ChIP assays will be conducted to explore the transcriptional regulation and elongation mechanisms of CDK8.

Result

CDK8 influences OA advancement by being recruited to the SASP promoter region in cooperation with NF-κB, leading to the elongation phosphorylation of Rpb1 CTD within the context of NF-κB-induced gene specificity, thereby regulating SASP transcription. The SASP secreted by chondrocytes during this process promotes the inflammatory microenvironment in the joint and drives macrophage differentiation into osteoclasts, further worsening the severity of osteoarthritis.

Conclusion

The SASP secreted by chondrocytes during the OA process plays a crucial role in worsening the severity of the disease. Inhibiting CDK8 expression can decrease its secretion by downregulating the transcription levels of SASP, which are co-regulated by CDK8 and NF-κB. This could offer a new target for osteoarthritis treatment.
细胞周期蛋白依赖性激酶8 (CDK8)是CDK家族成员,通过转录激活调节炎症过程的发展。CDK8在骨关节炎(OA)进展中的作用尚不清楚。本研究旨在探讨CDK8是否通过其转录调控功能,协同软骨细胞内NF-κB调控衰老相关分泌表型(senescence-associated secretory phenotype, SASP)基因的转录,从而加剧骨关节炎(osteoarthritis, OA)进展过程中的炎症微环境,并探讨其具体机制。方法采用H&;E染色、免疫印迹、Western印迹、qRT-PCR、免疫荧光和ELISA检测OA病理标志物,评价CDK8沉默或过表达的影响。OA模型采用DMM手术小鼠模型,采用PAM和Von Frey试验测量小鼠痛阈值。我们将通过荧光素酶和ChIP检测来探索CDK8的转录调控和延伸机制。结果cdk8通过与NF-κB协同募集到SASP启动子区,在NF-κB诱导的基因特异性背景下,导致Rpb1 CTD的伸长磷酸化,从而调控SASP转录,从而影响OA的进展。软骨细胞在此过程中分泌的SASP促进关节内炎症微环境,驱动巨噬细胞分化为破骨细胞,进一步加重骨关节炎的严重程度。结论骨性关节炎过程中软骨细胞分泌的SASP在加重骨性关节炎病情中起着至关重要的作用。抑制CDK8的表达可以通过下调SASP的转录水平来减少其分泌,而SASP的转录水平是由CDK8和NF-κB共同调控的。这可能为骨关节炎的治疗提供一个新的靶点。
{"title":"CDK8 mediated inflammatory microenvironment aggravates osteoarthritis progression","authors":"Zhongnan Lin, Yining Xu, Hongyi Jiang, Wen Zeng, Yuhan Wang, Liang Zhu, Chihao Lin, Chao Lou, Hanting Shen, Han Ye, Yean Gu, Huachen Yu, Xiaoyun Pan, Lin Zheng","doi":"10.1016/j.jare.2025.01.017","DOIUrl":"https://doi.org/10.1016/j.jare.2025.01.017","url":null,"abstract":"<h3>Introduction</h3>Cyclin-Dependent Kinase 8 (CDK8), a CDK family member, regulates the development of inflammatory processes through transcriptional activation. The involvement of CDK8 in osteoarthritis (OA) progression is not yet understood.<h3>Objectives</h3>This study aims to investigate whether CDK8, through its transcriptional regulatory functions, collaborates with NF-κB in chondrocytes to regulate the transcription of senescence-associated secretory phenotype (SASP) genes, thereby exacerbating the inflammatory microenvironment in the progression of osteoarthritis (OA), and to explore the specific mechanisms involved.<h3>Methods</h3>The effects of CDK8 silencing or overexpression will be assessed by measuring OA pathological markers through H&amp;E staining, immunoblotting, Western blot, qRT-PCR, immunofluorescence and ELISA. The DMM surgery mouse model will be used as the OA model, and the PAM and Von Frey tests will be employed to measure the pain threshold in mice. Luciferase and ChIP assays will be conducted to explore the transcriptional regulation and elongation mechanisms of CDK8.<h3>Result</h3>CDK8 influences OA advancement by being recruited to the SASP promoter region in cooperation with NF-κB, leading to the elongation phosphorylation of Rpb1 CTD within the context of NF-κB-induced gene specificity, thereby regulating SASP transcription. The SASP secreted by chondrocytes during this process promotes the inflammatory microenvironment in the joint and drives macrophage differentiation into osteoclasts, further worsening the severity of osteoarthritis.<h3>Conclusion</h3>The SASP secreted by chondrocytes during the OA process plays a crucial role in worsening the severity of the disease. Inhibiting CDK8 expression can decrease its secretion by downregulating the transcription levels of SASP, which are co-regulated by CDK8 and NF-κB. This could offer a new target for osteoarthritis treatment.","PeriodicalId":14952,"journal":{"name":"Journal of Advanced Research","volume":"13 1","pages":""},"PeriodicalIF":10.7,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142968314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Soil nutrient limitation controls trophic cascade effects of micro-food web-derived ecological functions in degraded agroecosystems 土壤养分限制控制退化农业生态系统微食物网衍生生态功能的营养级联效应
IF 10.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Pub Date : 2025-01-12 DOI: 10.1016/j.jare.2025.01.018
Haobo Xu, Xinxing He, Juan Chen, Xiaozhou Huang, Yazhen Chen, Yichen Xu, Yu Xiao, Tao Liu, Hanjie He, Yingping Wang, Xiaodong Yang, Leilei Shi, Hongzhi Zhang, Wende Yan

Introduction

Soil nutrient supply drives the ecological functions of soil micro-food webs through bottom-up and top-down mechanisms in degraded agroecosystems. Nutrient limitation responds sensitively to variations in degraded agroecosystems through restoration practices, such as legume intercropping.

Objectives

This study examined the effects of legume intercropping on trophic cascade dynamics through resource supply in degraded purple soil ecosystems.

Methods

A field experiment was conducted with three plantation types: Camellia oleifera monoculture (CK), C. oleiferaArachis hypogaea (peanut) intercropping (CP), and C. oleiferaSenna tora intercropping (CS). Using soil nutrient limitation as a premise, modified by legume intercropping, we assessed the biodiversity of soil biotic taxa, analysed their community composition, and applied partial least squares path modelling (PLS-PM) to link trophic cascade with ecological functions.

Results

Legume intercropping altered the abundance of biotic taxa, leading to changes in biotic diversity and microbial life strategies. The PLS-PM results indicated that legume intercropping enhanced bacterial diversity by aggravating soil P limitation, which subsequently increased protist consumer diversity and omnivore-predator nematode abundance through a bottom-up effect. Omnivore-predator nematodes and protist consumers indirectly influenced soil P metabolism, down-regulated through bacteria in the top-down effect. We observed high consistency between the untargeted metabolomic analysis and soil nutrient limitations. These findings indicate that soil micro-food web structure and function responded sensitively to legume intercropping in degraded ecosystems.

Conclusion

The results highlight the role of soil nutrient limitation in shaping micro-food webs and suggest that soil P limitation controls the down-regulation of soil P-related ecological functions through bottom-up and top-down effects.
在退化的农业生态系统中,土壤养分供应通过自下而上和自上而下的机制驱动土壤微食物网的生态功能。通过豆类间作等恢复措施,营养限制对退化农业生态系统的变化反应敏感。目的研究豆科作物间作通过资源供给对退化紫色土壤生态系统营养级联动态的影响。方法采用油茶单作(CK)、油茶-花生间作(CP)和油茶-番泻草间作(CS) 3种种植类型进行田间试验。以土壤养分限制为前提,采用豆科作物间作改良,评估了土壤生物类群的多样性,分析了其群落组成,并应用偏最小二乘路径模型(PLS-PM)将营养级联与生态功能联系起来。结果作物间作改变了生物类群的丰度,导致了生物多样性和微生物生存策略的变化。PLS-PM结果表明,豆科作物间作通过加重土壤磷限制来提高细菌多样性,从而通过自下而上的效应增加原生生物的消费多样性和杂食性-捕食线虫的丰度。杂食性捕食线虫和原生消费者间接影响土壤磷代谢,并通过细菌自上而下的作用下调。我们观察到非靶向代谢组学分析与土壤养分限制之间的高度一致性。这些结果表明,退化生态系统土壤微食物网结构和功能对豆科作物间作有敏感响应。结论土壤养分限制在微食物网形成中的作用,表明土壤磷限制通过自下而上和自上而下的作用调控土壤磷相关生态功能的下调。
{"title":"Soil nutrient limitation controls trophic cascade effects of micro-food web-derived ecological functions in degraded agroecosystems","authors":"Haobo Xu, Xinxing He, Juan Chen, Xiaozhou Huang, Yazhen Chen, Yichen Xu, Yu Xiao, Tao Liu, Hanjie He, Yingping Wang, Xiaodong Yang, Leilei Shi, Hongzhi Zhang, Wende Yan","doi":"10.1016/j.jare.2025.01.018","DOIUrl":"https://doi.org/10.1016/j.jare.2025.01.018","url":null,"abstract":"<h3>Introduction</h3>Soil nutrient supply drives the ecological functions of soil micro-food webs through bottom-up and top-down mechanisms in degraded agroecosystems. Nutrient limitation responds sensitively to variations in degraded agroecosystems through restoration practices, such as legume intercropping.<h3>Objectives</h3>This study examined the effects of legume intercropping on trophic cascade dynamics through resource supply in degraded purple soil ecosystems.<h3>Methods</h3>A field experiment was conducted with three plantation types: <em>Camellia oleifera</em> monoculture (CK), <em>C. oleifera</em>–<em>Arachis hypogaea</em> (<em>peanut</em>) intercropping (CP), and <em>C. oleifera</em>–<em>Senna tora</em> intercropping (CS). Using soil nutrient limitation as a premise, modified by legume intercropping, we assessed the biodiversity of soil biotic taxa, analysed their community composition, and applied partial least squares path modelling (PLS-PM) to link trophic cascade with ecological functions.<h3>Results</h3>Legume intercropping altered the abundance of biotic taxa, leading to changes in biotic diversity and microbial life strategies. The PLS-PM results indicated that legume intercropping enhanced bacterial diversity by aggravating soil P limitation, which subsequently increased protist consumer diversity and omnivore-predator nematode abundance through a bottom-up effect. Omnivore-predator nematodes and protist consumers indirectly influenced soil P metabolism, down-regulated through bacteria in the top-down effect. We observed high consistency between the untargeted metabolomic analysis and soil nutrient limitations. These findings indicate that soil micro-food web structure and function responded sensitively to legume intercropping in degraded ecosystems.<h3>Conclusion</h3>The results highlight the role of soil nutrient limitation in shaping micro-food webs and suggest that soil P limitation controls the down-regulation of soil P-related ecological functions through bottom-up and top-down effects.","PeriodicalId":14952,"journal":{"name":"Journal of Advanced Research","volume":"10 1","pages":""},"PeriodicalIF":10.7,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142968311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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