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Ye T, Yan X, Bai H, Wu Y, Liu J, Zhang X, Wei Y, Wang S. Borneol regulates meningeal lymphatic valve plasticity to clear Aβ aggregates in the prevention of AD-like symptoms. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 130:155753. [PMID: 38795693 DOI: 10.1016/j.phymed.2024.155753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 05/05/2024] [Accepted: 05/15/2024] [Indexed: 05/28/2024]
Abstract
BACKGROUND Meningeal lymphatic vessels (mLVs) have great potential to be the therapeutic target for β Amyloid protein (Aβ) clearing in Alzheimer's disease (AD), but the regulatory methods of the mLVs are limited. The lymphatic valve, marked by FOXC2, is the fundamental structure for maintaining stable lymphatic drainage function. Preliminary evidence suggested that borneol (BO) as the classical phytochemicals could enhance the expression of FOXC2 in the mLVs of healthy mice. PURPOSE This study aims to explore the regulatory ability of BO on lymphatic valves of mLVs in the AD model mice. STUDY DESIGN We used the intracerebroventricular injection of Aβ42 oligomers to construct the AD-like symptoms model induced by toxic protein deposition. We administered BO nano micelles(BO-Ms) orally before and after to simulate the AD prevention and treatment strategy. METHODS Herein, this study characterized the efficacy and pathways of BO-Ms for regulating mLVs in AD model by Rt-PCR, WB and confocal microscopy, and determined the effects of BO-Ms on Aβ clearance, behavior and safety of AD mice. RESULTS The AD modeling process severely impaired the expression of lymphatic valves. However, after oral administering BO-Ms for prevention and treatment, an increase in the lymphatic valves of the transverse sinus was observed, which derived from the up-regulation of the transcription factor (FOXC2 and Akt) and the down-regulation of the transcription inhibitors (FOXO1 and PRDM1). Furthermore, the effects of BO-Ms on the lymphatic valves could enhance the lymphatic drainage of the mLVs in AD-like mice, promoting the clearance of toxicity aggregates, protecting neurons, and alleviating AD-like symptoms. Simultaneously, continuous oral BO-Ms for 30 days didn't show any significant organ toxicity. The most important thing was that the preventive effect of BO administration was superior to therapeutic administration in all data. CONCLUSION In summary, our research indicated that BO is a promoter of lymphatic valve formation in the mLVs, and could prevent or repair damage caused by toxic Aβ42. BO was the only bioactive natural product with the ability to regulate mLVs valves. Thus, BO has the potential to become phytochemicals for alleviating AD symptoms by enhancing the drainage function of mLVs.
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Affiliation(s)
- Tiantian Ye
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China.
| | - Xiaodan Yan
- Department of Pharmaceutics, School of Life Sciences and Biopharmaceuticals, Shenyang Pharmaceutical University, Shenyang, China
| | - Hui Bai
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Yue Wu
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Jun Liu
- Department of Pharmaceutics, School of Boundless Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Xiaolong Zhang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Yimei Wei
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Shujun Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China.
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Du J, Liu P, Zhou Y, Misener S, Sharma I, Leeaw P, Thomson BR, Jin J, Quaggin SE. The mechanosensory channel PIEZO1 functions upstream of angiopoietin/TIE/FOXO1 signaling in lymphatic development. J Clin Invest 2024; 134:e176577. [PMID: 38747287 PMCID: PMC11093609 DOI: 10.1172/jci176577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 03/12/2024] [Indexed: 05/19/2024] Open
Abstract
Lymphedema is a debilitating disease with no effective cure and affects an estimated 250 million individuals worldwide. Prior studies have identified mutations in piezo-type mechanosensitive ion channel component 1 (PIEZO1), angiopoietin 2 (ANGPT2), and tyrosine kinase with Ig-like and EGF-like domains 1 (TIE1) in patients with primary lymphedema. Here, we identified crosstalk between these molecules and showed that activation of the mechanosensory channel PIEZO1 in lymphatic endothelial cells (LECs) caused rapid exocytosis of the TIE ligand ANGPT2, ectodomain shedding of TIE1 by disintegrin and metalloproteinase domain-containing protein 17 (ADAM17), and increased TIE/PI3K/AKT signaling, followed by nuclear export of the transcription factor FOXO1. These data establish a functional network between lymphedema-associated genes and provide what we believe to be the first molecular mechanism bridging channel function with vascular signaling and intracellular events culminating in transcriptional regulation of genes expressed in LECs. Our study provides insights into the regulation of lymphatic function and molecular pathways involved in human disease.
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Affiliation(s)
- Jing Du
- Feinberg Cardiovascular and Renal Research Institute
| | - Pan Liu
- Feinberg Cardiovascular and Renal Research Institute
| | - Yalu Zhou
- Feinberg Cardiovascular and Renal Research Institute
| | - Sol Misener
- Feinberg Cardiovascular and Renal Research Institute
| | - Isha Sharma
- Feinberg Cardiovascular and Renal Research Institute
| | - Phoebe Leeaw
- Feinberg Cardiovascular and Renal Research Institute
| | - Benjamin R. Thomson
- Feinberg Cardiovascular and Renal Research Institute
- Department of Ophthalmology, and
| | - Jing Jin
- Feinberg Cardiovascular and Renal Research Institute
- Division of Nephrology, Department of Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Susan E. Quaggin
- Feinberg Cardiovascular and Renal Research Institute
- Division of Nephrology, Department of Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
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3
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K. C. R, Patel NR, Shenoy A, Scallan JP, Chiang MY, Galazo MJ, Meadows SM. Zmiz1 is a novel regulator of lymphatic endothelial cell gene expression and function. PLoS One 2024; 19:e0302926. [PMID: 38718095 PMCID: PMC11078365 DOI: 10.1371/journal.pone.0302926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Zinc Finger MIZ-Type Containing 1 (Zmiz1), also known as ZIMP10 or RAI17, is a transcription cofactor and member of the Protein Inhibitor of Activated STAT (PIAS) family of proteins. Zmiz1 is critical for a variety of biological processes including vascular development. However, its role in the lymphatic vasculature is unknown. In this study, we utilized human dermal lymphatic endothelial cells (HDLECs) and an inducible, lymphatic endothelial cell (LEC)-specific Zmiz1 knockout mouse model to investigate the role of Zmiz1 in LECs. Transcriptional profiling of ZMIZ1-deficient HDLECs revealed downregulation of genes crucial for lymphatic vessel development. Additionally, our findings demonstrated that loss of Zmiz1 results in reduced expression of proliferation and migration genes in HDLECs and reduced proliferation and migration in vitro. We also presented evidence that Zmiz1 regulates Prox1 expression in vitro and in vivo by modulating chromatin accessibility at Prox1 regulatory regions. Furthermore, we observed that loss of Zmiz1 in mesenteric lymphatic vessels significantly reduced valve density. Collectively, our results highlight a novel role of Zmiz1 in LECs and as a transcriptional regulator of Prox1, shedding light on a previously unknown regulatory factor in lymphatic vascular biology.
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Affiliation(s)
- Rajan K. C.
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Nehal R. Patel
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Anoushka Shenoy
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Joshua P. Scallan
- Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States of America
| | - Mark Y. Chiang
- Department of Internal Medicine, Division of Hematology-Oncology, Medical School, University of Michigan, Ann Arbor, MI, United States of America
| | - Maria J. Galazo
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States of America
| | - Stryder M. Meadows
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States of America
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Jin L, Han Z, Mao X, Lu J, Yan B, Lu Y, Liang L, Wang L, Yu Y, Sun K. Genome-wide profiling of angiogenic cis-regulatory elements unravels cis-regulatory SNPs for vascular abnormality. Sci Data 2024; 11:467. [PMID: 38719891 PMCID: PMC11078952 DOI: 10.1038/s41597-024-03272-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 04/16/2024] [Indexed: 05/12/2024] Open
Abstract
Angiogenesis is extensively involved in embryonic development and requires complex regulation networks, whose defects can cause a variety of vascular abnormalities. Cis-regulatory elements control gene expression at all developmental stages, but they have not been studied or profiled in angiogenesis yet. In this study, we exploited public DNase-seq and RNA-seq datasets from a VEGFA-stimulated in vitro angiogenic model, and carried out an integrated analysis of the transcriptome and chromatin accessibility across the entire process. Totally, we generated a bank of 47,125 angiogenic cis-regulatory elements with promoter (marker by H3K4me3) and/or enhancer (marker by H3K27ac) activities. Motif enrichment analysis revealed that these angiogenic cis-regulatory elements interacted preferentially with ETS family TFs. With this tool, we performed an association study using our WES data of TAPVC and identified rs199530718 as a cis-regulatory SNP associated with disease risk. Altogether, this study generated a genome-wide bank of angiogenic cis-regulatory elements and illustrated its utility in identifying novel cis-regulatory SNPs for TAPVC, expanding new horizons of angiogenesis as well as vascular abnormality genetics.
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Affiliation(s)
- Lihui Jin
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.
| | - Zhenyuan Han
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
| | - Xiaotong Mao
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Jieru Lu
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
- Department of Pediatrics, Lishui People's Hospital, Lishui, 323050, China
| | - Bingqian Yan
- Department of NICU, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Yiwen Lu
- Department of Laboratory Medicine, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Lili Liang
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Lin Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
| | - Yu Yu
- Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.
| | - Kun Sun
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.
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Gu X, Chen X, Zhang X, Liu K, Li JJ, Lv W, Zeng L, Wu M, Zhou W, Wang W, Shi S, Deng Y, Li Y, Gao X, Ju R, Dubrac A, Liu X, Zhang F. Macrophage-induced integrin signaling promotes Schlemm's canal formation to prevent intraocular hypertension and glaucomatous optic neuropathy. Cell Rep 2024; 43:113799. [PMID: 38367239 DOI: 10.1016/j.celrep.2024.113799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 12/13/2023] [Accepted: 01/31/2024] [Indexed: 02/19/2024] Open
Abstract
Schlemm's canal (SC) functions to maintain proper intraocular pressure (IOP) by draining aqueous humor and has emerged as a promising therapeutic target for glaucoma, the second-leading cause of irreversible blindness worldwide. However, our current understanding of the mechanisms governing SC development and functionality remains limited. Here, we show that vitronectin (VTN) produced by limbal macrophages promotes SC formation and prevents intraocular hypertension by activating integrin αvβ3 signaling. Genetic inactivation of this signaling system inhibited the phosphorylation of AKT and FOXO1 and reduced β-catenin activity and FOXC2 expression, thereby causing impaired Prox1 expression and deteriorated SC morphogenesis. This ultimately led to increased IOP and glaucomatous optic neuropathy. Intriguingly, we found that aged SC displayed downregulated integrin β3 in association with dampened Prox1 expression. Conversely, FOXO1 inhibition rejuvenated the aged SC by inducing Prox1 expression and SC regrowth, highlighting a possible strategy by targeting VTN/integrin αvβ3 signaling to improve SC functionality.
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Affiliation(s)
- Xinyu Gu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xun Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xuan Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Keli Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Jing-Jing Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Wenyu Lv
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510060, China
| | - Lei Zeng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Mingjuan Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Weibin Zhou
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510060, China
| | - Weifa Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Shunhua Shi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Yicheng Deng
- School of Medicine, Sun Yat-sen University, Guangzhou 510060, China
| | - Yunhua Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xinbo Gao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Rong Ju
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Alexandre Dubrac
- Centre de Recherche, CHU St. Justine, Montréal, QC, Canada; Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, QC, Canada
| | - Xialin Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Feng Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China.
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6
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Cantu A, Cantu Gutierrez M, Zhang Y, Dong X, Lingappan K. Endothelial to mesenchymal transition in neonatal hyperoxic lung injury: role of sex as a biological variable. Physiol Genomics 2023; 55:345-354. [PMID: 37395632 PMCID: PMC10625841 DOI: 10.1152/physiolgenomics.00037.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/12/2023] [Accepted: 06/27/2023] [Indexed: 07/04/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) is characterized by an arrest in alveolarization, abnormal vascular development, and variable interstitial fibroproliferation in the premature lung. Endothelial to mesenchymal transition (EndoMT) may be a source of pathological fibrosis in many organ systems. Whether EndoMT contributes to the pathogenesis of BPD is not known. We tested the hypothesis that pulmonary endothelial cells will show increased expression of EndoMT markers upon exposure to hyperoxia and that sex as a biological variable will modulate differences in expression. Wild-type (WT) and Cdh5-PAC CreERT2 (endothelial reporter) neonatal male and female mice (C57BL6) were exposed to hyperoxia (0.95 [Formula: see text]) either during the saccular stage of lung development (95% [Formula: see text]; postnatal day 1-5 [PND1-5]) or through the saccular and early alveolar stages of lung development (75% [Formula: see text]; PND1-14). Expression of EndoMT markers was measured in whole lung and endothelial cell mRNA. Sorted lung endothelial cells (from room air- and hyperoxia-exposed lungs) were subjected to bulk RNA-Seq. We show that exposure of the neonatal lung to hyperoxia leads to upregulation of key markers of EndoMT. Furthermore, using lung sc-RNA-Seq data from neonatal lung we were able to show that all endothelial cell subpopulations including the lung capillary endothelial cells show upregulation of EndoMT-related genes. Markers related to EndoMT are upregulated in the neonatal lung upon exposure to hyperoxia and show sex-specific differences. Mechanisms mediating EndoMT in the injured neonatal lung can modulate the response of the neonatal lung to hyperoxic injury and need further investigation.NEW & NOTEWORTHY We show that neonatal hyperoxia exposure increased EndoMT markers in the lung endothelial cells and this biological process exhibits sex-specific differences.
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Affiliation(s)
- Abiud Cantu
- Division of Neonatology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
| | - Manuel Cantu Gutierrez
- Division of Neonatology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
| | - Yuhao Zhang
- Division of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, United States
| | - Xiaoyu Dong
- Division of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, United States
| | - Krithika Lingappan
- Division of Neonatology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
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Banerjee R, Knauer LA, Iyer D, Barlow SE, Scallan JP, Yang Y. Rictor induces AKT signaling to regulate lymphatic valve formation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.12.544698. [PMID: 37397997 PMCID: PMC10312634 DOI: 10.1101/2023.06.12.544698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Lymphatic valves are specialized structures of the collecting lymphatic vessels and are crucial for preventing retrograde lymph flow. Mutations in valve-forming genes have been clinically implicated in the pathology of congenital lymphedema. Lymphatic valves form when oscillatory shear stress (OSS) from lymph flow signals through the PI3K/AKT pathway to promote the transcription of valve-forming genes that trigger the growth and maintenance of lymphatic valves throughout life. Conventionally, in other tissue types, AKT activation requires dual kinase activity and the mammalian target of rapamycin complex 2 (mTORC2) commands this process by phosphorylating AKT at Ser473. Here we showed that embryonic and postnatal lymphatic deletion of Rictor , a critical component of mTORC2, led to a significant decrease in lymphatic valves and prevented the maturation of collecting lymphatic vessels. RICTOR knockdown in human lymphatic endothelial cells (hdLECs) not only significantly reduced the level of activated AKT and the expression of valve-forming genes under no-flow conditions, but also abolished the upregulation of AKT activity and valve-forming genes in response to flow. We further showed that the AKT target, FOXO1, a repressor of lymphatic valve formation, had increased nuclear activity in Rictor knockout mesenteric LECs, in vivo . Deletion of Foxo1 in Rictor knockout mice restored the number of valves to control levels in both mesenteric and ear lymphatics. Our work revealed a novel role of RICTOR signaling in the mechanotransduction signaling pathway, wherein it activates AKT and prevents the nuclear accumulation of the valve repressor, FOXO1, which ultimately allows the formation and maintenance of a normal lymphatic valve.
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Arany Z. Riding up the escaLEC-TOR for valvular health. J Cell Biol 2023; 222:e202305005. [PMID: 37227450 PMCID: PMC10225616 DOI: 10.1083/jcb.202305005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Endothelial-lined valves assure unidirectional flow in the lymphatic system. In this issue, Saygili Demir et al. (2023. J. Cell Biol.https://doi.org/10.1083/jcb.202207049) demonstrate how continuous repair of these valves occur, beginning with mTOR-activated cell replication in valve sinuses, and followed by cell migration to cover the valve surface.
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Affiliation(s)
- Zolt Arany
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Saygili Demir C, Sabine A, Gong M, Dormond O, Petrova TV. Mechanosensitive mTORC1 signaling maintains lymphatic valves. J Cell Biol 2023; 222:e202207049. [PMID: 37036444 PMCID: PMC10097975 DOI: 10.1083/jcb.202207049] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 01/26/2023] [Accepted: 03/23/2023] [Indexed: 04/11/2023] Open
Abstract
Homeostatic maintenance and repair of lymphatic vessels are essential for health. We investigated the dynamics and the molecular mechanisms of lymphatic endothelial cell (LEC) renewal in adult mesenteric quiescent lymphatic vasculature using label-retention, lineage tracing, and cell ablation strategies. Unlike during development, adult LEC turnover and proliferation was confined to the valve regions of collecting vessels, with valve cells displaying the shortest lifespan. Proliferating valve sinus LECs were the main source for maintenance and repair of lymphatic valves. We identified mechanistic target of rapamycin complex 1 (mTORC1) as a mechanoresponsive pathway activated by fluid shear stress in LECs. Depending on the shear stress level, mTORC1 activity drives division of valve cells or dictates their mechanic resilience through increased protein synthesis. Overactivation of lymphatic mTORC1 in vivo promoted supernumerary valve formation. Our work provides insights into the molecular mechanisms of maintenance of healthy lymphatic vascular system.
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Affiliation(s)
- Cansaran Saygili Demir
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Amélie Sabine
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Muyun Gong
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Olivier Dormond
- Department of Visceral Surgery, Lausanne University Hospital, Lausanne, Switzerland
| | - Tatiana V. Petrova
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
- Swiss Institute for Experimental Cancer Research, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
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10
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Deng H, Zhang J, Wu F, Wei F, Han W, Xu X, Zhang Y. Current Status of Lymphangiogenesis: Molecular Mechanism, Immune Tolerance, and Application Prospect. Cancers (Basel) 2023; 15:cancers15041169. [PMID: 36831512 PMCID: PMC9954532 DOI: 10.3390/cancers15041169] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
The lymphatic system is a channel for fluid transport and cell migration, but it has always been controversial in promoting and suppressing cancer. VEGFC/VEGFR3 signaling has long been recognized as a major molecular driver of lymphangiogenesis. However, many studies have shown that the neural network of lymphatic signaling is complex. Lymphatic vessels have been found to play an essential role in the immune regulation of tumor metastasis and cardiac repair. This review describes the effects of lipid metabolism, extracellular vesicles, and flow shear forces on lymphangiogenesis. Moreover, the pro-tumor immune tolerance function of lymphatic vessels is discussed, and the tasks of meningeal lymphatic vessels and cardiac lymphatic vessels in diseases are further discussed. Finally, the value of conversion therapy targeting the lymphatic system is introduced from the perspective of immunotherapy and pro-lymphatic biomaterials for lymphangiogenesis.
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Affiliation(s)
- Hongyang Deng
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Jiaxing Zhang
- Key Laboratory of the Digestive System Tumors of Gansu Province, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Fahong Wu
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Fengxian Wei
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Wei Han
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Xiaodong Xu
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
| | - Youcheng Zhang
- Hepatic-Biliary-Pancreatic Institute, Department of General Surgery, Lanzhou University Second Hospital, Lanzhou 730030, China
- Correspondence:
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Ujiie N, Kume T. Mechanical forces in lymphatic vessel development: Focus on transcriptional regulation. Front Physiol 2022; 13:1066460. [PMID: 36439271 PMCID: PMC9685408 DOI: 10.3389/fphys.2022.1066460] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 10/26/2022] [Indexed: 11/11/2022] Open
Abstract
The lymphatic system is crucial for the maintenance of interstitial fluid and protein homeostasis. It has important roles in collecting excess plasma and interstitial fluid leaked from blood vessels, lipid absorption and transportation in the digestive system, and immune surveillance and response. The development of lymphatic vessels begins during fetal life as lymphatic endothelial progenitor cells first differentiate into lymphatic endothelial cells (LECs) by expressing the master lymphatic vascular regulator, prospero-related homeobox 1 (PROX1). The lymphatic vasculature forms a hierarchical network that consists of blind-ended and unidirectional vessels. Although much progress has been made in the elucidation of the cellular and molecular mechanisms underlying the formation of the lymphatic vascular system, the causes of lymphatic vessel abnormalities and disease are poorly understood and complicated; specifically, the mechanistic basis for transcriptional dysregulation in lymphatic vessel development remains largely unclear. In this review, we discuss the recent advances in our understanding of the molecular and cellular mechanisms of lymphatic vascular development, including LEC differentiation, lymphangiogenesis, and valve formation, and the significance of mechanical forces in lymphatic vessels, with a focus on transcriptional regulation. We also summarize the current knowledge on epigenetic mechanisms of lymphatic gene expression.
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Lee Y, Zawieja SD, Muthuchamy M. Lymphatic Collecting Vessel: New Perspectives on Mechanisms of Contractile Regulation and Potential Lymphatic Contractile Pathways to Target in Obesity and Metabolic Diseases. Front Pharmacol 2022; 13:848088. [PMID: 35355722 PMCID: PMC8959455 DOI: 10.3389/fphar.2022.848088] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 02/17/2022] [Indexed: 01/19/2023] Open
Abstract
Obesity and metabolic syndrome pose a significant risk for developing cardiovascular disease and remain a critical healthcare challenge. Given the lymphatic system's role as a nexus for lipid absorption, immune cell trafficking, interstitial fluid and macromolecule homeostasis maintenance, the impact of obesity and metabolic disease on lymphatic function is a burgeoning field in lymphatic research. Work over the past decade has progressed from the association of an obese phenotype with Prox1 haploinsufficiency and the identification of obesity as a risk factor for lymphedema to consistent findings of lymphatic collecting vessel dysfunction across multiple metabolic disease models and organisms and characterization of obesity-induced lymphedema in the morbidly obese. Critically, recent findings have suggested that restoration of lymphatic function can also ameliorate obesity and insulin resistance, positing lymphatic targeted therapies as relevant pharmacological interventions. There remain, however, significant gaps in our understanding of lymphatic collecting vessel function, particularly the mechanisms that regulate the spontaneous contractile activity required for active lymph propulsion and lymph return in humans. In this article, we will review the current findings on lymphatic architecture and collecting vessel function, including recent advances in the ionic basis of lymphatic muscle contractile activity. We will then discuss lymphatic dysfunction observed with metabolic disruption and potential pathways to target with pharmacological approaches to improve lymphatic collecting vessel function.
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Affiliation(s)
- Yang Lee
- Department of Medical Physiology, College of Medicine, Texas A&M University, Bryan, TX, United States
| | - Scott D Zawieja
- Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Mariappan Muthuchamy
- Department of Medical Physiology, College of Medicine, Texas A&M University, Bryan, TX, United States
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Blei F. Update February 2022. Lymphat Res Biol 2022; 20:89-114. [PMID: 35167345 DOI: 10.1089/lrb.2021.29118.fb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Francine Blei
- NYU Langone Health, Grossman School of Medicine, New York, NY, USA
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