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Xiao T, Yang L, Yang F, Nie G, Jin X, Peng X, Zhong X, Wang J, Lu Y, Zheng Y. Traceability of chemicals from Tripterygium Wilfordii Hook. f. in raw honey and the potential synergistic effects of honey on acute toxicity induced by celastrol and triptolide. Food Chem 2024; 447:139044. [PMID: 38513481 DOI: 10.1016/j.foodchem.2024.139044] [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: 10/25/2023] [Revised: 03/02/2024] [Accepted: 03/13/2024] [Indexed: 03/23/2024]
Abstract
The object of this study was to trace TwHf-derived toxins in raw honey and clarify their acute toxic effect related to the addition of honey or sugars. TwHf flowers, raw honey from TwHf planting base and from beekeepers in high-risk area were detected using LC-MS/MS. The results revealed five target toxins were detected in TwHf flowers; only celastrol was detected in one raw honey sample, as a food safety risk factor, celastrol had been traced back to TwHf flowers from raw honey. In a series of acute toxic tests on zebrafish, toxification effects were observed when honey, mimic honey or sugar was mixed with toxins. The degree of toxicity varied among various sugar-based solutions. At the same mass concentration, they follow this order: raw honey/mimic honey > glucose > fructose. The main toxic target organs of triptolide and celastrol with honey were the heart and liver.
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Affiliation(s)
- Tian Xiao
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China; College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Li Yang
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China; College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Fan Yang
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Guang Nie
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China; College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Xiue Jin
- Hubei Institute of Veterinary Drug Control, Wuhan 430000, China
| | - Xiaoying Peng
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Xiaohong Zhong
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Jun Wang
- Hubei Institute of Veterinary Drug Control, Wuhan 430000, China.
| | - Ying Lu
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China; College of Horticulture, Hunan Agricultural University, Changsha 410128, China.
| | - Yajie Zheng
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China; College of Horticulture, Hunan Agricultural University, Changsha 410128, China.
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2
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Fister AM, Horn A, Lasarev M, Huttenlocher A. Damage-induced basal epithelial cell migration modulates the spatial organization of redox signaling and sensory neuron regeneration. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.03.14.532628. [PMID: 36993176 PMCID: PMC10055054 DOI: 10.1101/2023.03.14.532628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Epithelial damage leads to early reactive oxygen species (ROS) signaling, which regulates sensory neuron regeneration and tissue repair. How the initial type of tissue injury influences early damage signaling and regenerative growth of sensory axons remains unclear. Previously we reported that thermal injury triggers distinct early tissue responses in larval zebrafish. Here, we found that thermal but not mechanical injury impairs sensory axon regeneration and function. Real-time imaging revealed an immediate tissue response to thermal injury characterized by the rapid Arp2/3-dependent migration of keratinocytes, which was associated with tissue-scale ROS production and sustained sensory axon damage. Isotonic treatment was sufficient to limit keratinocyte movement, spatially restrict ROS production and rescue sensory neuron function. These results suggest that early keratinocyte dynamics regulate the spatial and temporal pattern of long-term signaling in the wound microenvironment during tissue repair.
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3
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Peloggia J, Lush ME, Tsai YY, Wood C, Piotrowski T. Environmental and molecular control of tissue-specific ionocyte differentiation in zebrafish. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.12.575421. [PMID: 38260427 PMCID: PMC10802608 DOI: 10.1101/2024.01.12.575421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Organisms adjust their physiology to cope with environmental fluctuations and maintain fitness. These adaptations occur via genetic changes over multiple generations or through acclimation, a set of reversible phenotypic changes that confer resilience to the individual. Aquatic organisms are subject to dramatic seasonal fluctuations in water salinity, which can affect the function of lateral line mechanosensory hair cells. To maintain hair cell function when salinity decreases, ion-regulating cells, Neuromast-associated ionocytes (Nm ionocytes), increase in number and invade lateral line neuromasts. How environmental changes trigger this adaptive differentiation of Nm ionocytes and how these cells are specified is still unknown. Here, we identify Nm ionocyte progenitors as foxi3a/foxi3b-expressing skin cells and show that their differentiation is associated with sequential activation of different Notch pathway components, which control ionocyte survival. We demonstrate that new Nm ionocytes are rapidly specified by absolute salinity levels, independently of stress response pathways. We further show that Nm ionocyte differentiation is selectively triggered by depletion of specific ions, such as Ca2+ and Na+/Cl-, but not by low K+ levels, and is independent of media osmolarity. Finally, we demonstrate that hair cell activity plays a role in Nm ionocyte recruitment and that systemic factors are not necessary for Nm ionocyte induction. In summary, we have identified how environmental changes activate a signaling cascade that triggers basal skin cell progenitors to differentiate into Nm ionocytes and invade lateral line organs. This adaptive behavior is an example of physiological plasticity that may prove essential for survival in changing climates.
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Affiliation(s)
- Julia Peloggia
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Mark E. Lush
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Ya-Yin Tsai
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Christopher Wood
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Tatjana Piotrowski
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
- Lead Contact
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Lee EEL, O'Malley-Krohn I, Edsinger E, Wu S, Malamy J. Epithelial wound healing in Clytia hemisphaerica provides insights into extracellular ATP signaling mechanisms and P2XR evolution. Sci Rep 2023; 13:18819. [PMID: 37914720 PMCID: PMC10620158 DOI: 10.1038/s41598-023-45424-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 10/19/2023] [Indexed: 11/03/2023] Open
Abstract
Epithelial wound healing involves the collective responses of many cells, including those at the wound margin (marginal cells) and those that lack direct contact with the wound (submarginal cells). How these responses are induced and coordinated to produce rapid, efficient wound healing remains poorly understood. Extracellular ATP (eATP) is implicated as a signal in epithelial wound healing in vertebrates. However, the role of eATP in wound healing in vivo and the cellular responses to eATP are unclear. Almost nothing is known about eATP signaling in non-bilaterian metazoans (Cnidaria, Ctenophora, Placozoa, and Porifera). Here, we show that eATP promotes closure of epithelial wounds in vivo in the cnidarian Clytia hemisphaerica (Clytia) indicating that eATP signaling is an evolutionarily ancient strategy in wound healing. Furthermore, eATP increases F-actin accumulation at the edges of submarginal cells. In Clytia, this indicates eATP is involved in coordinating cellular responses during wound healing, acting in part by promoting actin remodeling in cells at a distance from the wound. We also present evidence that eATP activates a cation channel in Clytia epithelial cells. This implies that the eATP signal is transduced through a P2X receptor (P2XR). Phylogenetic analyses identified four Clytia P2XR homologs and revealed two deeply divergent major branches in P2XR evolution, necessitating revision of current models. Interestingly, simple organisms such as cellular slime mold appear exclusively on one branch, bilaterians are found exclusively on the other, and many non-bilaterian metazoans, including Clytia, have P2XR sequences from both branches. Together, these results re-draw the P2XR evolutionary tree, provide new insights into the origin of eATP signaling in wound healing, and demonstrate that the cytoskeleton of submarginal cells is a target of eATP signaling.
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Affiliation(s)
- Elizabeth E L Lee
- Department of Molecular Genetics and Cell Biology, The University of Chicago, 929 East 57th Street, Chicago, IL, 60637, USA
| | - Isabel O'Malley-Krohn
- Biological Sciences Collegiate Division, The University of Chicago, 929 East 57th Street, Chicago, IL, 60637, USA
| | - Eric Edsinger
- Whitney Laboratory for Marine Biosciences, University of Florida, 9505 N Ocean Shore Blvd, St. Augustine, FL, 32080, USA
| | - Stephanie Wu
- Biological Sciences Collegiate Division, The University of Chicago, 929 East 57th Street, Chicago, IL, 60637, USA
| | - Jocelyn Malamy
- Department of Molecular Genetics and Cell Biology, The University of Chicago, 929 East 57th Street, Chicago, IL, 60637, USA.
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5
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Wiegand J, Hoang J, Avila-Barnard S, Nemarugommula C, Ha M, Zhang S, Stapleton HM, Volz DC. Triphenyl phosphate-induced pericardial edema in zebrafish embryos is reversible following depuration in clean water. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 263:106699. [PMID: 37734274 PMCID: PMC10878734 DOI: 10.1016/j.aquatox.2023.106699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/13/2023] [Accepted: 09/17/2023] [Indexed: 09/23/2023]
Abstract
Triphenyl phosphate (TPHP) - a widely used organophosphate-based flame retardant - blocks cardiac looping during zebrafish development in a concentration-dependent manner, a phenotype that is dependent on disruption of embryonic osmoregulation and pericardial edema formation. However, it's currently unclear whether (1) TPHP-induced effects on osmoregulation are driven by direct TPHP-induced injury to the embryonic epidermis and (2) whether TPHP-induced pericardial edema is reversible or irreversible following cessation of exposure. Therefore, the objectives of this study were to determine whether TPHP-induced pericardial edema is reversible and whether TPHP causes injury to the embryonic epidermis by quantifying the number of DAPI-positive epidermal cells and analyzing the morphology of the yolk sac epithelium using scanning electron microscopy. First, we found that exposure to 5 μM TPHP from 24-72 h post-fertilization (hpf) did not increase prolactin - a hormone that regulates ions and water levels - in embryonic zebrafish, whereas high ionic strength exposure media was associated with elevated levels of prolactin. Second, we found that exposure to 5 μM TPHP from 24-72 hpf did not decrease DAPI-positive epidermal cells within the embryonic epithelium, and that co-exposure with 2.14 μM fenretinide - a synthetic retinoid that promotes epithelial wound repair - from 24-72 hpf did not mitigate the prevalence of TPHP-induced epidermal folds within the yolk sac epithelium when embryos were exposed within high ionic strength exposure media. Finally, we found that the pericardial area and body length of embryos exposed to 5 μM TPHP from 24-72 hpf were similar to vehicle-treated embryos at 120 hpf following transfer to clean water and depuration of TPHP from 72-120 hpf. Overall, our findings suggest that (1) the ionic strength of exposure media may influence the baseline physiology of zebrafish embryos; (2) TPHP does not cause direct injury to the embryonic epidermis; and (3) TPHP-induced effects on pericardial area and body length are reversible 48 h after transferring embryos to clean water.
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Affiliation(s)
- Jenna Wiegand
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - John Hoang
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Sarah Avila-Barnard
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Charvita Nemarugommula
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Megan Ha
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Sharon Zhang
- Division of Environmental Sciences and Policy, Duke University, Durham, NC 27708, United States
| | - Heather M Stapleton
- Division of Environmental Sciences and Policy, Duke University, Durham, NC 27708, United States
| | - David C Volz
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States.
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Tamás SX, Roux BT, Vámosi B, Dehne FG, Török A, Fazekas L, Enyedi B. A genetically encoded sensor for visualizing leukotriene B4 gradients in vivo. Nat Commun 2023; 14:4610. [PMID: 37528073 PMCID: PMC10393954 DOI: 10.1038/s41467-023-40326-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 07/22/2023] [Indexed: 08/03/2023] Open
Abstract
Leukotriene B4 (LTB4) is a potent lipid chemoattractant driving inflammatory responses during host defense, allergy, autoimmune and metabolic diseases. Gradients of LTB4 orchestrate leukocyte recruitment and swarming to sites of tissue damage and infection. How LTB4 gradients form and spread in live tissues to regulate these processes remains largely elusive due to the lack of suitable tools for monitoring LTB4 levels in vivo. Here, we develop GEM-LTB4, a genetically encoded green fluorescent LTB4 biosensor based on the human G-protein-coupled receptor BLT1. GEM-LTB4 shows high sensitivity, specificity and a robust fluorescence increase in response to LTB4 without affecting downstream signaling pathways. We use GEM-LTB4 to measure ex vivo LTB4 production of murine neutrophils. Transgenic expression of GEM-LTB4 in zebrafish allows the real-time visualization of both exogenously applied and endogenously produced LTB4 gradients. GEM-LTB4 thus serves as a broadly applicable tool for analyzing LTB4 dynamics in various experimental systems and model organisms.
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Affiliation(s)
- Szimonetta Xénia Tamás
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
- MTA-SE Lendület Tissue Damage Research Group, Hungarian Academy of Sciences and Semmelweis University, H-1094, Budapest, Hungary
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary
| | - Benoit Thomas Roux
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary
| | - Boldizsár Vámosi
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
| | - Fabian Gregor Dehne
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary
| | - Anna Török
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary
| | - László Fazekas
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary
- MTA-SE Lendület Tissue Damage Research Group, Hungarian Academy of Sciences and Semmelweis University, H-1094, Budapest, Hungary
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary
| | - Balázs Enyedi
- Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094, Budapest, Hungary.
- MTA-SE Lendület Tissue Damage Research Group, Hungarian Academy of Sciences and Semmelweis University, H-1094, Budapest, Hungary.
- HCEMM-SE Inflammatory Signaling Research Group, Department of Physiology, Semmelweis University, H-1094, Budapest, Hungary.
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7
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Kennard AS, Sathe M, Labuz EC, Prinz CK, Theriot JA. Post-injury hydraulic fracturing drives fissure formation in the zebrafish basal epidermal cell layer. Curr Biol 2023:S0960-9822(23)00616-4. [PMID: 37290442 DOI: 10.1016/j.cub.2023.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 03/05/2023] [Accepted: 05/10/2023] [Indexed: 06/10/2023]
Abstract
The skin epithelium acts as the barrier between an organism's internal and external environments. In zebrafish and other freshwater organisms, this barrier function requires withstanding a large osmotic gradient across the epidermis. Wounds breach this epithelium, causing a large disruption to the tissue microenvironment due to the mixing of isotonic interstitial fluid with the external hypotonic fresh water. Here, we show that, following acute injury, the larval zebrafish epidermis undergoes a dramatic fissuring process that resembles hydraulic fracturing, driven by the influx of external fluid. After the wound has sealed-preventing efflux of this external fluid-fissuring starts in the basal epidermal layer at the location nearest to the wound and then propagates at a constant rate through the tissue, spanning over 100 μm. During this process, the outermost superficial epidermal layer remains intact. Fissuring is completely inhibited when larvae are wounded in isotonic external media, suggesting that osmotic gradients are required for fissure formation. Additionally, fissuring partially depends on myosin II activity, as myosin II inhibition reduces the distance of fissure propagation away from the wound. During and after fissuring, the basal layer forms large macropinosomes (with cross-sectional areas ranging from 1 to 10 μm2). We conclude that excess external fluid entry through the wound and subsequent closure of the wound through actomyosin purse-string contraction in the superficial cell layer causes fluid pressure buildup in the extracellular space of the zebrafish epidermis. This excess fluid pressure causes tissue to fissure, and eventually the fluid is cleared through macropinocytosis.
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Affiliation(s)
- Andrew S Kennard
- Biophysics Program, Stanford University, Stanford, CA 94305, USA; Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA
| | - Mugdha Sathe
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA
| | - Ellen C Labuz
- Biophysics Program, Stanford University, Stanford, CA 94305, USA; Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA
| | - Christopher K Prinz
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA
| | - Julie A Theriot
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA.
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8
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Labuz EC, Footer MJ, Theriot JA. Confined keratocytes mimic in vivo migration and reveal volume-speed relationship. Cytoskeleton (Hoboken) 2023; 80:34-51. [PMID: 36576104 DOI: 10.1002/cm.21741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 12/07/2022] [Accepted: 12/26/2022] [Indexed: 12/29/2022]
Abstract
Fish basal epidermal cells, known as keratocytes, are well-suited for cell migration studies. In vitro, isolated keratocytes adopt a stereotyped shape with a large fan-shaped lamellipodium and a nearly spherical cell body. However, in their native in vivo environment, these cells adopt a significantly different shape during their rapid migration toward wounds. Within the epidermis, keratocytes experience two-dimensional (2D) confinement between the outer epidermal cell layer and the basement membrane; these two deformable surfaces constrain keratocyte cell bodies to be flatter in vivo than in isolation. In vivo keratocytes also exhibit a relative elongation of the front-to-back axis and substantially more lamellipodial ruffling, as compared to isolated cells. We have explored the effects of 2D confinement, separated from other in vivo environmental cues, by overlaying isolated cells with an agarose hydrogel with occasional spacers, or with a ceiling made of polydimethylsiloxane (PDMS) elastomer. Under these conditions, isolated keratocytes more closely resemble the in vivo migratory shape phenotype, displaying a flatter apical-basal axis and a longer front-to-back axis than unconfined keratocytes. We propose that 2D confinement contributes to multiple dimensions of in vivo keratocyte shape determination. Further analysis demonstrates that confinement causes a synchronous 20% decrease in both cell speed and volume. Interestingly, we were able to replicate the 20% decrease in speed using a sorbitol hypertonic shock to shrink the cell volume, which did not affect other aspects of cell shape. Collectively, our results suggest that environmentally imposed changes in cell volume may influence cell migration speed, potentially by perturbing physical properties of the cytoplasm.
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Affiliation(s)
- Ellen C Labuz
- Biophysics Program, Stanford University, Stanford, California, USA.,Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA
| | - Matthew J Footer
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA
| | - Julie A Theriot
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA
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9
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Zhang J, Riquelme MA, Hua R, Acosta FM, Gu S, Jiang JX. Connexin 43 hemichannels regulate mitochondrial ATP generation, mobilization, and mitochondrial homeostasis against oxidative stress. eLife 2022; 11:82206. [DOI: 10.7554/elife.82206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022] Open
Abstract
Oxidative stress is a major risk factor that causes osteocyte cell death and bone loss. Prior studies primarily focus on the function of cell surface expressed Cx43 channels. Here, we reported a new role of mitochondrial Cx43 (mtCx43) and hemichannels (HCs) in modulating mitochondria homeostasis and function in bone osteocytes under oxidative stress. In murine long bone osteocyte-Y4 cells, the translocation of Cx43 to mitochondria was increased under H2O2-induced oxidative stress. H2O2 increased the mtCx43 level accompanied by elevated mtCx43 HC activity, determined by dye uptake assay. Cx43 knockdown (KD) by the CRISPR-Cas9 lentivirus system resulted in impairment of mitochondrial function, primarily manifested as decreased ATP production. Cx43 KD had reduced intracellular reactive oxidative species levels and mitochondrial membrane potential. Additionally, live-cell imaging results demonstrated that the proton flux was dependent on mtCx43 HCs because its activity was specifically inhibited by an antibody targeting Cx43 C-terminus. The co-localization and interaction of mtCx43 and ATP synthase subunit F (ATP5J2) were confirmed by Förster resonance energy transfer and a protein pull-down assay. Together, our study suggests that mtCx43 HCs regulate mitochondrial ATP generation by mediating K+, H+, and ATP transfer across the mitochondrial inner membrane and the interaction with mitochondrial ATP synthase, contributing to the maintenance of mitochondrial redox levels in response to oxidative stress.
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Affiliation(s)
- Jingruo Zhang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
| | - Manuel A Riquelme
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
| | - Rui Hua
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
| | - Francisca M Acosta
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
| | - Sumin Gu
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
| | - Jean X Jiang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center
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10
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Denham ST, Brammer B, Chung KY, Wambaugh MA, Bednarek JM, Guo L, Moreau CT, Brown JCS. A dissemination-prone morphotype enhances extrapulmonary organ entry by Cryptococcus neoformans. Cell Host Microbe 2022; 30:1382-1400.e8. [PMID: 36099922 PMCID: PMC9588642 DOI: 10.1016/j.chom.2022.08.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/01/2022] [Accepted: 08/18/2022] [Indexed: 01/08/2023]
Abstract
Environmental pathogens move from ecological niches to mammalian hosts, requiring adaptation to dramatically different environments. Microbes that disseminate farther, including the fungal meningitis pathogen Cryptococcus neoformans, require additional adaptation to diverse tissues. We demonstrate that the formation of a small C. neoformans morphotype-called "seed" cells due to their colonizing ability-is critical for extrapulmonary organ entry. Seed cells exhibit changes in fungal cell size and surface expression that result in an enhanced macrophage update. Seed cell formation is triggered by environmental factors, including C. neoformans' environmental niche, and pigeon guano with phosphate plays a central role. Seed cells show the enhanced expression of phosphate acquisition genes, and mutants unable to acquire phosphate fail to adopt the seed cell morphotype. Additionally, phosphate can be released by tissue damage, potentially establishing a feed-forward loop of seed cell formation and dissemination. Thus, C. neoformans' size variation represent inducible morphotypes that change host interactions to facilitate microbe spread.
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Affiliation(s)
- Steven T Denham
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Brianna Brammer
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Krystal Y Chung
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Morgan A Wambaugh
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Joseph M Bednarek
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Li Guo
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Christian T Moreau
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
| | - Jessica C S Brown
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA.
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11
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Fernandez-Gonzalez R, Peifer M. Powering morphogenesis: multiscale challenges at the interface of cell adhesion and the cytoskeleton. Mol Biol Cell 2022; 33. [PMID: 35696393 DOI: 10.1091/mbc.e21-09-0452] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Among the defining features of the animal kingdom is the ability of cells to change shape and move. This underlies embryonic and postembryonic development, tissue homeostasis, regeneration, and wound healing. Cell shape change and motility require linkage of the cell's force-generating machinery to the plasma membrane at cell-cell and cell-extracellular matrix junctions. Connections of the actomyosin cytoskeleton to cell-cell adherens junctions need to be both resilient and dynamic, preventing tissue disruption during the dramatic events of embryonic morphogenesis. In the past decade, new insights radically altered the earlier simple paradigm that suggested simple linear linkage via the cadherin-catenin complex as the molecular mechanism of junction-cytoskeleton interaction. In this Perspective we provide a brief overview of our current state of knowledge and then focus on selected examples highlighting what we view as the major unanswered questions in our field and the approaches that offer exciting new insights at multiple scales from atomic structure to tissue mechanics.
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Affiliation(s)
- Rodrigo Fernandez-Gonzalez
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G5, Canada.,Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, ON M5S 3G5, Canada.,Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.,Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
| | - Mark Peifer
- Lineberger Comprehensive Cancer Center, Chapel Hill, NC 27599-3280.,Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280
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12
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Shkarina K, Hasel de Carvalho E, Santos JC, Ramos S, Leptin M, Broz P. Optogenetic activators of apoptosis, necroptosis, and pyroptosis. J Cell Biol 2022; 221:213145. [PMID: 35420640 DOI: 10.1083/jcb.202109038] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 02/16/2022] [Accepted: 03/18/2022] [Indexed: 12/20/2022] Open
Abstract
Targeted and specific induction of cell death in an individual or groups of cells hold the potential for new insights into the response of tissues or organisms to different forms of death. Here, we report the development of optogenetically controlled cell death effectors (optoCDEs), a novel class of optogenetic tools that enables light-mediated induction of three types of programmed cell death (PCD)-apoptosis, pyroptosis, and necroptosis-using Arabidopsis thaliana photosensitive protein Cryptochrome-2. OptoCDEs enable a rapid and highly specific induction of PCD in human, mouse, and zebrafish cells and are suitable for a wide range of applications, such as sub-lethal cell death induction or precise elimination of single cells or cell populations in vitro and in vivo. As the proof-of-concept, we utilize optoCDEs to assess the differences in neighboring cell responses to apoptotic or necrotic PCD, revealing a new role for shingosine-1-phosphate signaling in regulating the efferocytosis of the apoptotic cell by epithelia.
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Affiliation(s)
- Kateryna Shkarina
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | | | - José Carlos Santos
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Saray Ramos
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Maria Leptin
- Director's Research, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Petr Broz
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
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13
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Heller IS, Guenther CA, Meireles AM, Talbot WS, Kingsley DM. Characterization of mouse Bmp5 regulatory injury element in zebrafish wound models. Bone 2022; 155:116263. [PMID: 34826632 PMCID: PMC9007314 DOI: 10.1016/j.bone.2021.116263] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 11/21/2022]
Abstract
Many key signaling molecules used to build tissues during embryonic development are re-activated at injury sites to stimulate tissue regeneration and repair. Bone morphogenetic proteins provide a classic example, but the mechanisms that lead to reactivation of BMPs following injury are still unknown. Previous studies have mapped a large "injury response element" (IRE) in the mouse Bmp5 gene that drives gene expression following bone fractures and other types of injury. Here we show that the large mouse IRE region is also activated in both zebrafish tail resection and mechanosensory hair cell injury models. Using the ability to test multiple constructs and image temporal and spatial dynamics following injury responses, we have narrowed the original size of the mouse IRE region by over 100 fold and identified a small 142 bp minimal enhancer that is rapidly induced in both mesenchymal and epithelial tissues after injury. These studies identify a small sequence that responds to evolutionarily conserved local signals in wounded tissues and suggest candidate pathways that contribute to BMP reactivation after injury.
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Affiliation(s)
- Ian S Heller
- Department of Developmental Biology, Stanford University School of Medicine, United States of America
| | - Catherine A Guenther
- Department of Developmental Biology, Stanford University School of Medicine, United States of America; Howard Hughes Medical Institute, Stanford University School of Medicine, United States of America
| | - Ana M Meireles
- Department of Developmental Biology, Stanford University School of Medicine, United States of America
| | - William S Talbot
- Department of Developmental Biology, Stanford University School of Medicine, United States of America
| | - David M Kingsley
- Department of Developmental Biology, Stanford University School of Medicine, United States of America; Howard Hughes Medical Institute, Stanford University School of Medicine, United States of America.
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14
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Sehring I, Weidinger G. Zebrafish Fin: Complex Molecular Interactions and Cellular Mechanisms Guiding Regeneration. Cold Spring Harb Perspect Biol 2021; 14:cshperspect.a040758. [PMID: 34649924 DOI: 10.1101/cshperspect.a040758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The zebrafish caudal fin has become a popular model to study cellular and molecular mechanisms of regeneration due to its high regenerative capacity, accessibility for experimental manipulations, and relatively simple anatomy. The formation of a regenerative epidermis and blastema are crucial initial events and tightly regulated. Both the regenerative epidermis and the blastema are highly organized structures containing distinct domains, and several signaling pathways regulate the formation and interaction of these domains. Bone is the major tissue regenerated from the progenitor cells of the blastema. Several cellular mechanisms can provide source cells for blastemal (pre-)osteoblasts, including dedifferentiation of differentiated osteoblasts and de novo formation from other cell types, providing intriguing examples of cellular plasticity. In recent years, omics analyses and single-cell approaches have elucidated genetic and epigenetic regulation, increasing our knowledge of the surprisingly complex coordination of various mechanisms to achieve successful restoration of a seemingly simple structure.
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Affiliation(s)
- Ivonne Sehring
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Gilbert Weidinger
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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15
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Abstract
The cell nucleus is best known as the container of the genome. Its envelope provides a barrier for passive macromolecule diffusion, which enhances the control of gene expression. As its largest and stiffest organelle, the nucleus also defines the minimal space requirements of a cell. Internal or external pressures that deform a cell to its physical limits cause a corresponding nuclear deformation. Evidence is consolidating that the nucleus, in addition to its genetic functions, serves as a physical sensing device for critical cell body deformation. Nuclear mechanotransduction allows cells to adapt their acute behaviors, mechanical stability, paracrine signaling, and fate to their physical surroundings. This review summarizes the basic chemical and mechanical properties of nuclear components, and how these properties are thought to be utilized for mechanosensing.
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Affiliation(s)
- Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA;
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16
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O’Connor J, Akbar FB, Hutson MS, Page-McCaw A. Zones of cellular damage around pulsed-laser wounds. PLoS One 2021; 16:e0253032. [PMID: 34570791 PMCID: PMC8476025 DOI: 10.1371/journal.pone.0253032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/07/2021] [Indexed: 11/19/2022] Open
Abstract
After a tissue is wounded, cells surrounding the wound adopt distinct wound-healing behaviors to repair the tissue. Considerable effort has been spent on understanding the signaling pathways that regulate immune and tissue-resident cells as they respond to wounds, but these signals must ultimately originate from the physical damage inflicted by the wound. Tissue wounds comprise several types of cellular damage, and recent work indicates that different types of cellular damage initiate different types of signaling. Hence to understand wound signaling, it is important to identify and localize the types of wound-induced cellular damage. Laser ablation is widely used by researchers to create reproducible, aseptic wounds in a tissue that can be live-imaged. Because laser wounding involves a combination of photochemical, photothermal and photomechanical mechanisms, each with distinct spatial dependencies, cells around a pulsed-laser wound will experience a gradient of damage. Here we exploit this gradient to create a map of wound-induced cellular damage. Using genetically-encoded fluorescent proteins, we monitor damaged cellular and sub-cellular components of epithelial cells in living Drosophila pupae in the seconds to minutes following wounding. We hypothesized that the regions of damage would be predictably arrayed around wounds of varying sizes, and subsequent analysis found that all damage radii are linearly related over a 3-fold range of wound size. Thus, around laser wounds, the distinct regions of damage can be estimated after measuring any one. This report identifies several different types of cellular damage within a wounded epithelial tissue in a living animal. By quantitatively mapping the size and placement of these different types of damage, we set the foundation for tracing wound-induced signaling back to the damage that initiates it.
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Affiliation(s)
- James O’Connor
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Program in Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Fabiha Bushra Akbar
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - M. Shane Hutson
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Andrea Page-McCaw
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Program in Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
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17
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Bassat E, Tanaka EM. The cellular and signaling dynamics of salamander limb regeneration. Curr Opin Cell Biol 2021; 73:117-123. [PMID: 34521022 DOI: 10.1016/j.ceb.2021.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/19/2021] [Accepted: 07/27/2021] [Indexed: 12/16/2022]
Abstract
Limb amputation in salamanders yields a wound response that ultimately leads to replacement of the missing part. This unique-among-tetrapod trait involves the migration and recruitment of multiple cell types including epithelium, immune cells, axonal growth cones, and connective tissue cells to build the blastema which contains the proliferating stem and progenitor cells to rebuild the limb tissues. A number of the signaling and cell biological events have been defined. They point to the intimate coordination of physical events such as osmotic pressure, cell migration, and cell-cell communication with changes in cell identity such as dedifferentiation into embryonic-like epithelial and mesenchymal cells.
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Affiliation(s)
- Elad Bassat
- Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus Vienna Biocenter, 1030, Vienna, Austria
| | - Elly M Tanaka
- Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus Vienna Biocenter, 1030, Vienna, Austria.
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18
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O'Connor JT, Stevens AC, Shannon EK, Akbar FB, LaFever KS, Narayanan NP, Gailey CD, Hutson MS, Page-McCaw A. Proteolytic activation of Growth-blocking peptides triggers calcium responses through the GPCR Mthl10 during epithelial wound detection. Dev Cell 2021; 56:2160-2175.e5. [PMID: 34273275 DOI: 10.1016/j.devcel.2021.06.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 05/20/2021] [Accepted: 06/25/2021] [Indexed: 12/20/2022]
Abstract
The presence of a wound triggers surrounding cells to initiate repair mechanisms, but it is not clear how cells initially detect wounds. In epithelial cells, the earliest known wound response, occurring within seconds, is a dramatic increase in cytosolic calcium. Here, we show that wounds in the Drosophila notum trigger cytoplasmic calcium increase by activating extracellular cytokines, Growth-blocking peptides (Gbps), which initiate signaling in surrounding epithelial cells through the G-protein-coupled receptor Methuselah-like 10 (Mthl10). Latent Gbps are present in unwounded tissue and are activated by proteolytic cleavage. Using wing discs, we show that multiple protease families can activate Gbps, suggesting that they act as a generalized protease-detector system. We present experimental and computational evidence that proteases released during wound-induced cell damage and lysis serve as the instructive signal: these proteases liberate Gbp ligands, which bind to Mthl10 receptors on surrounding epithelial cells, and activate downstream release of calcium.
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Affiliation(s)
- James T O'Connor
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA; Program in Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Aaron C Stevens
- Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, USA
| | - Erica K Shannon
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA; Program in Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Fabiha Bushra Akbar
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Kimberly S LaFever
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Neil P Narayanan
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Casey D Gailey
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - M Shane Hutson
- Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, USA; Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA; Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN, USA.
| | - Andrea Page-McCaw
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA; Program in Developmental Biology, Vanderbilt University, Nashville, TN, USA; Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, TN, USA.
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19
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Abstract
The cell nucleus is best known as the container of the genome. Its envelope provides a barrier for passive macromolecule diffusion, which enhances the control of gene expression. As its largest and stiffest organelle, the nucleus also defines the minimal space requirements of a cell. Internal or external pressures that deform a cell to its physical limits cause a corresponding nuclear deformation. Evidence is consolidating that the nucleus, in addition to its genetic functions, serves as a physical sensing device for critical cell body deformation. Nuclear mechanotransduction allows cells to adapt their acute behaviors, mechanical stability, paracrine signaling, and fate to their physical surroundings. This review summarizes the basic chemical and mechanical properties of nuclear components, and how these properties are thought to be utilized for mechanosensing. Expected final online publication date for the Annual Review of Cell and Developmental Biology, Volume 37 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA;
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20
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Ma J, Scott CA, Ho YN, Mahabaleshwar H, Marsay KS, Zhang C, Teow CK, Ng SS, Zhang W, Tergaonkar V, Partridge LJ, Roy S, Amaya E, Carney TJ. Matriptase activation of Gq drives epithelial disruption and inflammation via RSK and DUOX. eLife 2021; 10:66596. [PMID: 34165081 PMCID: PMC8291973 DOI: 10.7554/elife.66596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 06/23/2021] [Indexed: 11/13/2022] Open
Abstract
Epithelial tissues are primed to respond to insults by activating epithelial cell motility and rapid inflammation. Such responses are also elicited upon overexpression of the membrane-bound protease, Matriptase, or mutation of its inhibitor, Hai1. Unrestricted Matriptase activity also predisposes to carcinoma. How Matriptase leads to these cellular outcomes is unknown. We demonstrate that zebrafish hai1a mutants show increased H2O2, NfκB signalling, and IP3R -mediated calcium flashes, and that these promote inflammation, but do not generate epithelial cell motility. In contrast, inhibition of the Gq subunit in hai1a mutants rescues both the inflammation and epithelial phenotypes, with the latter recapitulated by the DAG analogue, PMA. We demonstrate that hai1a has elevated MAPK pathway activity, inhibition of which rescues the epidermal defects. Finally, we identify RSK kinases as MAPK targets disrupting adherens junctions in hai1a mutants. Our work maps novel signalling cascades mediating the potent effects of Matriptase on epithelia, with implications for tissue damage response and carcinoma progression. Cancer occurs when normal processes in the cell become corrupted or unregulated. Many proteins can contribute, including one enzyme called Matriptase that cuts other proteins at specific sites. Matriptase activity is tightly controlled by a protein called Hai1. In mice and zebrafish, when Hai1 cannot adequately control Matriptase activity, invasive cancers with severe inflammation develop. However, it is unclear how unregulated Matriptase leads to both inflammation and cancer invasion. One outcome of Matriptase activity is removal of proteins called Cadherins from the cell surface. These proteins have a role in cell adhesion: they act like glue to stick cells together. Without them, cells can dissociate from a tissue and move away, a critical step in cancer cells invading other organs. However, it is unknown exactly how Matriptase triggers the removal of Cadherins from the cell surface to promote invasion. Previous work has shown that Matriptase switches on a receptor called Proteinase-activated receptor 2, or Par2 for short, which is known to activate many enzymes, including one called phospholipase C. When activated, this enzyme releases two signals into the cell: a sugar called inositol triphosphate, IP3; and a lipid or fat called diacylglycerol, DAG. It is possible that these two signals have a role to play in how Matriptase removes Cadherins from the cell surface. To find out, Ma et al. mapped the effects of Matriptase in zebrafish lacking the Hai1 protein. This revealed that Matriptase increases IP3 and DAG levels, which initiate both inflammation and invasion. IP3 promotes inflammation by switching on pro-inflammatory signals inside the cell such as the chemical hydrogen peroxide. At the same time, DAG promotes cell invasion by activating a well-known cancer signalling pathway called MAPK. This pathway activates a protein called RSK. Ma et al. show that this protein is required to remove Cadherins from the surface of cells, thus connecting Matriptase’s activation of phospholipase C with its role in disrupting cell adhesion. An increase in the ratio of Matriptase to HAI-1 (the human equivalent of Hai1) is present in many cancers. For this reason, the signal cascades described by Ma et al. may be of interest in developing treatments for these cancers. Understanding how these signals work together could lead to more direct targeted anti-cancer approaches in the future.
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Affiliation(s)
- Jiajia Ma
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore
| | - Claire A Scott
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore.,Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Ying Na Ho
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore
| | - Harsha Mahabaleshwar
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore
| | - Katherine S Marsay
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore.,Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, United Kingdom
| | - Changqing Zhang
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore
| | - Christopher Kj Teow
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore
| | - Ser Sue Ng
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore
| | - Weibin Zhang
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore
| | - Vinay Tergaonkar
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore
| | - Lynda J Partridge
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, United Kingdom
| | - Sudipto Roy
- Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore, Singapore.,Department of Pediatrics, Yong Loo Ling School of Medicine, National University of Singapore, Singapore, Singapore
| | - Enrique Amaya
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Tom J Carney
- Lee Kong Chian School of Medicine, Experimental Medicine Building, Yunnan Garden Campus, 59 Nanyang Drive, Nanyang Technological University, Singapore, Singapore.,Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore
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21
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López-Cuevas P, Cross SJ, Martin P. Modulating the Inflammatory Response to Wounds and Cancer Through Infection. Front Cell Dev Biol 2021; 9:676193. [PMID: 33996835 PMCID: PMC8120001 DOI: 10.3389/fcell.2021.676193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 04/06/2021] [Indexed: 11/21/2022] Open
Abstract
The zebrafish (Danio rerio) has recently emerged as an excellent model to study cancer biology and the tumour microenvironment, including the early inflammatory response to both wounding and early cancer growth. Here, we use high-resolution confocal imaging of translucent zebrafish larvae, with novel automated tracking and cell:cell interaction software, to investigate how innate immune cells behave and interact with repairing wounds and early cancer (pre-neoplastic) cells expressing a mutant active human oncogene (HRASG12V). We show that bacterial infections, delivered either systemically or locally, induce a change in the number and behaviour of neutrophils and macrophages recruited to acute wounds and to pre-neoplastic cells, and that infection can modify cellular interactions in ways that lead to a significant delay in wound healing and a reduction in the number of pre-neoplastic cells. Besides offering insights as to how Coley’s toxins and other cancer bacteriotherapies may function to reduce cancer burden, our study also highlights novel software tools that can be easily adapted to investigate cellular behaviours and interactions in other zebrafish models.
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Affiliation(s)
- Paco López-Cuevas
- School of Biochemistry, University of Bristol, Bristol, United Kingdom
| | - Stephen J Cross
- Wolfson Bioimaging Facility, University of Bristol, Bristol, United Kingdom
| | - Paul Martin
- School of Biochemistry, University of Bristol, Bristol, United Kingdom.,School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, United Kingdom
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22
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Kennard A, Prinz C, Labuz E, Theriot J. Wounding Zebrafish Larval Epidermis by Laceration. Bio Protoc 2021; 11:e4260. [DOI: 10.21769/bioprotoc.4260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/17/2021] [Accepted: 09/28/2021] [Indexed: 11/02/2022] Open
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23
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Kennard AS, Theriot JA. Osmolarity-independent electrical cues guide rapid response to injury in zebrafish epidermis. eLife 2020; 9:e62386. [PMID: 33225997 PMCID: PMC7721437 DOI: 10.7554/elife.62386] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 11/17/2020] [Indexed: 01/02/2023] Open
Abstract
The ability of epithelial tissues to heal after injury is essential for animal life, yet the mechanisms by which epithelial cells sense tissue damage are incompletely understood. In aquatic organisms such as zebrafish, osmotic shock following injury is believed to be an early and potent activator of a wound response. We find that, in addition to sensing osmolarity, basal skin cells in zebrafish larvae are also sensitive to changes in the particular ionic composition of their surroundings after wounding, specifically the concentration of sodium chloride in the immediate vicinity of the wound. This sodium chloride-specific wound detection mechanism is independent of cell swelling, and instead is suggestive of a mechanism by which cells sense changes in the transepithelial electrical potential generated by the transport of sodium and chloride ions across the skin. Consistent with this hypothesis, we show that electric fields directly applied within the skin are sufficient to initiate actin polarization and migration of basal cells in their native epithelial context in vivo, even overriding endogenous wound signaling. This suggests that, in order to mount a robust wound response, skin cells respond to both osmotic and electrical perturbations arising from tissue injury.
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Affiliation(s)
- Andrew S Kennard
- Biophysics Program, Stanford UniversityStanfordUnited States
- Department of Biology and Howard Hughes Medical Institute, University of WashingtonSeattleUnited States
| | - Julie A Theriot
- Department of Biology and Howard Hughes Medical Institute, University of WashingtonSeattleUnited States
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24
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Kostyuk AI, Panova AS, Kokova AD, Kotova DA, Maltsev DI, Podgorny OV, Belousov VV, Bilan DS. In Vivo Imaging with Genetically Encoded Redox Biosensors. Int J Mol Sci 2020; 21:E8164. [PMID: 33142884 PMCID: PMC7662651 DOI: 10.3390/ijms21218164] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/13/2022] Open
Abstract
Redox reactions are of high fundamental and practical interest since they are involved in both normal physiology and the pathogenesis of various diseases. However, this area of research has always been a relatively problematic field in the context of analytical approaches, mostly because of the unstable nature of the compounds that are measured. Genetically encoded sensors allow for the registration of highly reactive molecules in real-time mode and, therefore, they began a new era in redox biology. Their strongest points manifest most brightly in in vivo experiments and pave the way for the non-invasive investigation of biochemical pathways that proceed in organisms from different systematic groups. In the first part of the review, we briefly describe the redox sensors that were used in vivo as well as summarize the model systems to which they were applied. Next, we thoroughly discuss the biological results obtained in these studies in regard to animals, plants, as well as unicellular eukaryotes and prokaryotes. We hope that this work reflects the amazing power of this technology and can serve as a useful guide for biologists and chemists who work in the field of redox processes.
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Affiliation(s)
- Alexander I. Kostyuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Anastasiya S. Panova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Aleksandra D. Kokova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Daria A. Kotova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Dmitry I. Maltsev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Federal Center for Cerebrovascular Pathology and Stroke, 117997 Moscow, Russia
| | - Oleg V. Podgorny
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Vsevolod V. Belousov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
- Federal Center for Cerebrovascular Pathology and Stroke, 117997 Moscow, Russia
- Institute for Cardiovascular Physiology, Georg August University Göttingen, D-37073 Göttingen, Germany
| | - Dmitry S. Bilan
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia; (A.I.K.); (A.S.P.); (A.D.K.); (D.A.K.); (D.I.M.); (O.V.P.); (V.V.B.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
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25
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Barros-Becker F, Squirrell JM, Burke R, Chini J, Rindy J, Karim A, Eliceiri KW, Gibson A, Huttenlocher A. Distinct Tissue Damage and Microbial Cues Drive Neutrophil and Macrophage Recruitment to Thermal Injury. iScience 2020; 23:101699. [PMID: 33196024 PMCID: PMC7644964 DOI: 10.1016/j.isci.2020.101699] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/17/2020] [Accepted: 10/14/2020] [Indexed: 12/21/2022] Open
Abstract
Tissue damage triggers a rapid innate immune response that mediates host defense. Previously we reported that thermal damage of the larval zebrafish fin disrupts collagen organization and induces a robust and potentially damaging innate immune response. The mechanisms that drive damaging versus protective neutrophil inflammation in interstitial tissues remain unclear. Here we identify distinct cues in the tissue microenvironment that differentially drive neutrophil and macrophage responses to sterile injury. Using live imaging, we found a motile zone for neutrophils, but not macrophages, in collagen-free regions and identified a specific role for interleukin-6 (IL-6) receptor signaling in neutrophil responses to thermal damage. IL-6 receptor mutants show impaired neutrophil recruitment to sterile thermal injury that was not present in tissues infected with Pseudomonas aeruginosa. These findings identify distinct signaling networks during neutrophil recruitment to sterile and microbial damage cues and provide a framework to limit potentially damaging neutrophil inflammation.
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Affiliation(s)
- Francisco Barros-Becker
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA.,Cellular and Molecular Biology Doctoral Training Program, University of Wisconsin-Madison, Madison, WI, USA
| | - Jayne M Squirrell
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Madison, WI, USA
| | - Russell Burke
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA
| | - Julia Chini
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA.,School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - Julie Rindy
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA.,Department of Pediatrics, University of Wisconsin-Madison, Madison, WI, USA
| | - Aos Karim
- Department of Surgery, University of Wisconsin-Madison, Madison WI, USA
| | - Kevin W Eliceiri
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Madison, WI, USA.,Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, USA
| | - Angela Gibson
- Department of Surgery, University of Wisconsin-Madison, Madison WI, USA
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA.,Department of Pediatrics, University of Wisconsin-Madison, Madison, WI, USA
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26
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Lipid peroxidation regulates long-range wound detection through 5-lipoxygenase in zebrafish. Nat Cell Biol 2020; 22:1049-1055. [PMID: 32868902 PMCID: PMC7898270 DOI: 10.1038/s41556-020-0564-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/24/2020] [Indexed: 12/19/2022]
Abstract
Rapid wound detection by distant leukocytes is essential for antimicrobial defense and post-infection survival 1. The reactive oxygen species hydrogen peroxide and the polyunsaturated fatty acid arachidonic acid are among the earliest known mediators of this process 2-4. It is unknown whether or how these highly conserved cues collaborate to achieve wound detection over distances of several hundreds of microns within a few minutes. To investigate this, we locally applied arachidonic acid and skin permeable peroxide by micropipette perfusion to unwounded zebrafish tail fins. As in wounds, arachidonic acid rapidly attracted leukocytes through dual oxidase (Duox) and 5-lipoxygenase (Alox5a). Peroxide promoted chemotaxis to arachidonic acid without being chemotactic on its own. Intravital biosensor imaging showed that wound peroxide and arachidonic acid converged on half-millimeter long lipid peroxidation gradients that promoted leukocyte attraction. Our data suggest that lipid peroxidation functions as spatial redox relay that enables long-range detection of early wound cues by immune cells, outlining a beneficial role for this otherwise toxic process.
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27
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Westman J, Grinstein S, Marques PE. Phagocytosis of Necrotic Debris at Sites of Injury and Inflammation. Front Immunol 2020; 10:3030. [PMID: 31998312 PMCID: PMC6962235 DOI: 10.3389/fimmu.2019.03030] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/10/2019] [Indexed: 12/20/2022] Open
Abstract
Clearance of cellular debris is required to maintain the homeostasis of multicellular organisms. It is intrinsic to processes such as tissue growth and remodeling, regeneration and resolution of injury and inflammation. Most of the removal of effete and damaged cells is performed by macrophages and neutrophils through phagocytosis, a complex phenomenon involving ingestion and degradation of the disposable particles. The study of the clearance of cellular debris has been strongly biased toward the removal of apoptotic bodies; as a result, the mechanisms underlying the removal of necrotic cells have remained relatively unexplored. Here, we will review the incipient but growing knowledge of the phagocytosis of necrotic debris, from their recognition and engagement to their internalization and disposal. Critical insights into these events were gained recently through the development of new in vitro and in vivo models, along with advances in live-cell and intravital microscopy. This review addresses the classes of "find-me" and "eat-me" signals presented by necrotic cells and their cognate receptors in phagocytes, which in most cases differ from the extensively characterized counterparts in apoptotic cell engulfment. The roles of damage-associated molecular patterns, chemokines, lipid mediators, and complement components in recruiting and activating phagocytes are reviewed. Lastly, the physiological importance of necrotic cell removal is emphasized, highlighting the key role of impaired debris clearance in autoimmunity.
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Affiliation(s)
- Johannes Westman
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON, Canada
| | - Sergio Grinstein
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON, Canada.,Department of Biochemistry, University of Toronto, Toronto, ON, Canada.,Keenan Research Centre of the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Pedro Elias Marques
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
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28
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Quantitative Imaging of Endogenous and Exogenous H 2O 2 Gradients in Live Zebrafish Larvae. Methods Mol Biol 2019; 1982:283-299. [PMID: 31172479 DOI: 10.1007/978-1-4939-9424-3_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Quantitative aspects of extracellular H2O2 signaling in animals, such as its spatiotemporal dynamics within tissues, remain little understood. Here we detail an optimized, experimental setup for measuring the dynamics and physiological consequences of extracellular H2O2 application to live tissues by intravital biosensor imaging in zebrafish larvae.
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29
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Zhou W, Pal AS, Hsu AYH, Gurol T, Zhu X, Wirbisky-Hershberger SE, Freeman JL, Kasinski AL, Deng Q. MicroRNA-223 Suppresses the Canonical NF-κB Pathway in Basal Keratinocytes to Dampen Neutrophilic Inflammation. Cell Rep 2019; 22:1810-1823. [PMID: 29444433 PMCID: PMC5839657 DOI: 10.1016/j.celrep.2018.01.058] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 11/10/2017] [Accepted: 01/19/2018] [Indexed: 12/11/2022] Open
Abstract
MicroRNA-223 is known as a myeloid-enriched anti-inflammatory microRNA that is dysregulated in numerous inflammatory conditions. Here, we report that neutrophilic inflammation (wound response) is augmented in miR-223-deficient zebrafish, due primarily to elevated activation of the canonical nuclear factor κB (NF-κB) pathway. NF-κB over-activation is restricted to the basal layer of the surface epithelium, although miR-223 is detected throughout the epithelium and in phagocytes. Not only phagocytes but also epithelial cells are involved in miR-223-mediated regulation of neutrophils' wound response and NF-κB activation. Cul1a/b, Traf6, and Tab1 are identified as direct targets of miR-223, and their levels rise in injured epithelium lacking miR-223. In addition, miR-223 is expressed in cultured human bronchial epithelial cells, where it also downregulates NF-κB signaling. Together, this direct connection between miR-223 and the canonical NF-κB pathway provides a mechanistic understanding of the multifaceted role of miR-223 and highlights the relevance of epithelial cells in dampening neutrophil activation.
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Affiliation(s)
- Wenqing Zhou
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Arpita S Pal
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Alan Yi-Hui Hsu
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Theodore Gurol
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Xiaoguang Zhu
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | | | - Jennifer L Freeman
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA; Purdue University Center for Cancer Research, West Lafayette, IN 47907, USA
| | - Andrea L Kasinski
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA; Purdue University Center for Cancer Research, West Lafayette, IN 47907, USA
| | - Qing Deng
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA; Purdue University Center for Cancer Research, West Lafayette, IN 47907, USA; Purdue Institute for Inflammation, Immunology, and Infectious Disease, West Lafayette, IN 47907, USA.
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30
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Huang C, Niethammer P. Tissue Damage Signaling Is a Prerequisite for Protective Neutrophil Recruitment to Microbial Infection in Zebrafish. Immunity 2019; 48:1006-1013.e6. [PMID: 29768163 DOI: 10.1016/j.immuni.2018.04.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 04/04/2018] [Accepted: 04/17/2018] [Indexed: 12/28/2022]
Abstract
Tissue damage and infection are deemed likewise triggers of innate immune responses. But whereas neutrophil responses to microbes are generally protective, neutrophil recruitment into damaged tissues without infection is deleterious. Why neutrophils respond to tissue damage and not just to microbes is unknown. Is it a flaw of the innate immune system that persists because evolution did not select against it, or does it provide a selective advantage? Here we dissect the contribution of tissue damage signaling to antimicrobial immune responses in a live vertebrate. By intravital imaging of zebrafish larvae, a powerful model for innate immunity, we show that prevention of tissue damage signaling upon microbial ear infection abrogates leukocyte chemotaxis and reduces animal survival, at least in part, through suppression of cytosolic phospholipase A2 (cPla2), which integrates tissue damage- and microbe-derived cues. Thus, microbial cues are insufficient, and damage signaling is essential for antimicrobial neutrophil responses in zebrafish.
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Affiliation(s)
- Cong Huang
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; BCMB Allied Program, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA
| | - Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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31
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Li M, Qi Y, Chen M, Wang Z, Zeng D, Xiao Y, Li S, Lin H, Wei X, Zhang G. GATA Binding Protein 3 Boosts Extracellular ATP Hydrolysis and Inhibits Metastasis of Breast Cancer by Up-regulating Ectonucleoside Triphosphate Diphosphohydrolase 3. Int J Biol Sci 2019; 15:2522-2537. [PMID: 31754326 PMCID: PMC6854379 DOI: 10.7150/ijbs.35563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/10/2019] [Indexed: 02/05/2023] Open
Abstract
Despite remarkable advancements in our understanding of breast cancer, it remains the leading cause of cancer deaths in women. Distant recurrence and metastasis is the main reason for death due to breast cancer. It is well recognized that the GATA binding protein 3 (GATA3), a transcription factor, is a tumor suppressor in breast cancer. To date, the mechanistic molecular details of GATA3 remain elusive, because, as a transcription factor, it is not a direct executor in physiological and pathological processes. Here, we demonstrate that GATA3 reduces the ATP level in the breast cancer microenvironment and inhibits breast cancer metastasis by up-regulating ectonucleoside triphosphate diphosphohydrolase 3 (ENTPD3). The extracellular ATP concentration is significantly higher in tumor tissues than in normal tissues and promotes the migration of cancer cells from the primary site. ENTPD3 hydrolyzes ATP in tumor microenvironment and suppresses breast cancer metastasis. Furthermore, ENTPD3 inhibits epithelial-to-mesenchymal transition, a key program responsible for the development of metastatic disease. These findings provide novel insights into the tumor suppressor activity of GATA3.
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Affiliation(s)
- Meifang Li
- ChangJiang Scholar's Laboratory of Shantou University Medical College, 22 Xinling Road, Shantou, China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - Yuzhu Qi
- ChangJiang Scholar's Laboratory of Shantou University Medical College, 22 Xinling Road, Shantou, China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - Min Chen
- The Cancer Center and the Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, 2000 East Xiang'an Rd, Xiang'an, Xiamen, China
| | - Zun Wang
- ChangJiang Scholar's Laboratory of Shantou University Medical College, 22 Xinling Road, Shantou, China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - De Zeng
- Department of Medical Oncology, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - Yingsheng Xiao
- Department of Thyroid Surgery, Central Hospital of Shantou, 114 Waima Road, Shantou, China
| | - Shaozhong Li
- ChangJiang Scholar's Laboratory of Shantou University Medical College, 22 Xinling Road, Shantou, China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - Haoyu Lin
- Department of Breast and Thyroid Surgery, the First Affiliated Hospital of Shantou University Medical College, 57 Changping Road, Shantou, China
| | - Xiaolong Wei
- Department of Pathology, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, China
| | - Guojun Zhang
- ChangJiang Scholar's Laboratory of Shantou University Medical College, 22 Xinling Road, Shantou, China
- The Cancer Center and the Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, 2000 East Xiang'an Rd, Xiang'an, Xiamen, China
- ✉ Corresponding author: GuoJun Zhang, MD, Ph. D. The Cancer Center and the Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, 2000 East Xiang'an Rd, Xiang'an, Xiamen, China. Tel: +86-592-2184298; E-mail:
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32
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Pietka W, Khnykin D, Bertelsen V, Lossius AH, Stav-Noraas TE, Hol Fosse J, Galtung HK, Haraldsen G, Sundnes O. Hypo-osmotic Stress Drives IL-33 Production in Human Keratinocytes-An Epidermal Homeostatic Response. J Invest Dermatol 2018; 139:81-90. [PMID: 30120934 DOI: 10.1016/j.jid.2018.07.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/28/2018] [Accepted: 07/16/2018] [Indexed: 12/22/2022]
Abstract
Although inflammation has traditionally been considered a response to either exogenous pathogen-associated signals or endogenous signals of cell damage, other perturbations of homeostasis, generally referred to as stress, may also induce inflammation. The relationship between stress and inflammation is, however, not well defined. Here, we describe a mechanism of IL-33 induction driven by hypo-osmotic stress in human keratinocytes and also report interesting differences when comparing the responsiveness of other inflammatory mediators. The induction of IL-33 was completely dependent on EGFR and calcium signaling, and inhibition of calcium signaling not only abolished IL-33 induction but also dramatically changed the transcriptional pattern of other cytokines upon hypo-osmotic stress. IL-33 was not secreted but instead showed nuclear sequestration, conceivably acting as a failsafe mechanism whereby it is induced by potential danger but released only upon more extreme homeostatic perturbations that result in cell death. Finally, stress-induced IL-33 was also confirmed in an ex vivo human skin model, translating this mechanism to a potential tissue-relevant signal in the human epidermis. In conclusion, we describe hypo-osmotic stress as an inducer of IL-33 expression, linking cellular stress to nuclear accumulation of a strong proinflammatory cytokine.
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Affiliation(s)
- Wojciech Pietka
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Denis Khnykin
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Vibeke Bertelsen
- Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Astrid Haaskjold Lossius
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Tor Espen Stav-Noraas
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Johanna Hol Fosse
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Hilde Kanli Galtung
- Department of Oral Biology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Guttorm Haraldsen
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway.
| | - Olav Sundnes
- K.G. Jebsen Inflammation Research Centre, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway; Department of Rheumatology, Dermatology and Infectious Diseases, University of Oslo and Oslo University Hospital, Oslo, Norway
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33
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Willoughby JR, Harder AM, Tennessen JA, Scribner KT, Christie MR. Rapid genetic adaptation to a novel environment despite a genome-wide reduction in genetic diversity. Mol Ecol 2018; 27:4041-4051. [PMID: 29802799 DOI: 10.1111/mec.14726] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Janna R. Willoughby
- Department of Biological Sciences; Purdue University; West Lafayette Indiana
- Department of Forestry and Natural Resources; Purdue University; West Lafayette Indiana
| | - Avril M. Harder
- Department of Biological Sciences; Purdue University; West Lafayette Indiana
| | - Jacob A. Tennessen
- Department of Integrative Biology; Oregon State University; Corvallis Oregon
| | - Kim T. Scribner
- Department of Fisheries and Wildlife; Michigan State University; East Lansing Michigan
- Department of Integrative Biology; Michigan State University; East Lansing Michigan
| | - Mark R. Christie
- Department of Biological Sciences; Purdue University; West Lafayette Indiana
- Department of Forestry and Natural Resources; Purdue University; West Lafayette Indiana
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34
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Affiliation(s)
- Eliane F.E. Wenstedt
- From the Division of Nephrology, Department of Internal Medicine, Amsterdam Cardiovascular Sciences, Academic Medical Center, University of Amsterdam, The Netherlands
| | - Rik H.G. Olde Engberink
- From the Division of Nephrology, Department of Internal Medicine, Amsterdam Cardiovascular Sciences, Academic Medical Center, University of Amsterdam, The Netherlands
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35
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Extracellular ATP activates hyaluronan synthase 2 ( HAS2) in epidermal keratinocytes via P2Y 2, Ca 2+ signaling, and MAPK pathways. Biochem J 2018; 475:1755-1772. [PMID: 29626161 DOI: 10.1042/bcj20180054] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/28/2018] [Accepted: 04/06/2018] [Indexed: 01/04/2023]
Abstract
Extracellular nucleotides are used as signaling molecules by several cell types. In epidermis, their release is triggered by insults such as ultraviolet radiation, barrier disruption, and tissue wounding, and by specific nerve terminals firing. Increased synthesis of hyaluronan, a ubiquitous extracellular matrix glycosaminoglycan, also occurs in response to stress, leading to the attractive hypothesis that nucleotide signaling and hyaluronan synthesis could also be linked. In HaCaT keratinocytes, ATP caused a rapid and strong but transient activation of hyaluronan synthase 2 (HAS2) expression via protein kinase C-, Ca2+/calmodulin-dependent protein kinase II-, mitogen-activated protein kinase-, and calcium response element-binding protein-dependent pathways by activating the purinergic P2Y2 receptor. Smaller but more persistent up-regulation of HAS3 and CD44, and delayed up-regulation of HAS1 were also observed. Accumulation of peri- and extracellular hyaluronan followed 4-6 h after stimulation, an effect further enhanced by the hyaluronan precursor glucosamine. AMP and adenosine, the degradation products of ATP, markedly inhibited HAS2 expression and, despite concomitant up-regulation of HAS1 and HAS3, inhibited hyaluronan synthesis. Functionally, ATP moderately increased cell migration, whereas AMP and adenosine had no effect. Our data highlight the strong influence of adenosinergic signaling on hyaluronan metabolism in human keratinocytes. Epidermal insults are associated with extracellular ATP release, as well as rapid up-regulation of HAS2/3, CD44, and hyaluronan synthesis, and we show here that the two phenomena are linked. Furthermore, as ATP is rapidly degraded, the opposite effects of its less phosphorylated derivatives facilitate a rapid shut-off of the hyaluronan response, providing a feedback mechanism to prevent excessive reactions when more persistent signals are absent.
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Abstract
Understanding how and why animals regenerate complex tissues has the potential to transform regenerative medicine. Here we present an overview of genetic approaches that have recently been applied to dissect mechanisms of regeneration. We describe new advances that relate to central objectives of regeneration biologists researching different tissues and species, focusing mainly on vertebrates. These objectives include defining the cellular sources and key cell behaviors in regenerating tissue, elucidating molecular triggers and brakes for regeneration, and defining the earliest events that control the presence of these molecular factors.
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Affiliation(s)
- Chen-Hui Chen
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan;
| | - Kenneth D Poss
- Department of Cell Biology, Duke University Medical Center, Durham, North Carolina 27710, USA;
- Regeneration Next, Duke University, Durham, North Carolina 27710, USA
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37
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Tarzemany R, Jiang G, Jiang JX, Larjava H, Häkkinen L. Connexin 43 Hemichannels Regulate the Expression of Wound Healing-Associated Genes in Human Gingival Fibroblasts. Sci Rep 2017; 7:14157. [PMID: 29074845 PMCID: PMC5658368 DOI: 10.1038/s41598-017-12672-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 09/18/2017] [Indexed: 02/01/2023] Open
Abstract
Connexin 43 (Cx43) is the most ubiquitous connexin in various cells, and presents as hemichannels (HCs) and gap junctions (GJs) on the cell membrane. We have recently shown that Cx43 abundance was strongly reduced in fibroblasts of human gingival wounds, and blocking Cx43 function in cultured human gingival fibroblasts (GFBLs) strongly regulated the expression of wound healing-related genes. However, it is not known whether these responses involved Cx43 HCs or GJs. Here we show that Cx43 assembled into distinct GJ and HC plaques in GFBLs both in vivo and in vitro. Specific blockage of Cx43 HC function by TAT-Gap19, a Cx43 mimetic peptide, significantly upregulated the expression of several MMPs, TGF-β signaling molecules, Tenascin-C, and VEGF-A, while pro-fibrotic molecules, including several extracellular matrix proteins and myofibroblast and cell contractility-related molecules, were significantly downregulated. These changes were linked with TAT-Gap19-induced suppression of ATP signaling and activation of the ERK1/2 signaling pathway. Collectively, our data suggest that reduced Cx43 HC function could promote fast and scarless gingival wound healing. Thus, selective suppression of Cx43 HCs may provide a novel target to modulate wound healing.
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Affiliation(s)
- Rana Tarzemany
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Guoqiao Jiang
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Jean X Jiang
- Department of Biochemistry, University of Texas Health Science Center, San Antonio, Texas, 78229-3900, USA
| | - Hannu Larjava
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Lari Häkkinen
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
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38
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Chen T, Zhao H, Gao L, Song L, Yang F, Du J. Hypotonicity promotes epithelial gap closure by lamellipodial protrusion. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2017; 148:60-64. [PMID: 28962936 DOI: 10.1016/j.pbiomolbio.2017.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/11/2017] [Accepted: 09/25/2017] [Indexed: 01/24/2023]
Abstract
The closure of gaps within epithelia is an essential part of many physiological and pathological processes, such as embryonic development, organ remodeling and wound healing. Emerging evidence proved that the physical microenvironment plays important roles in cell behaviors. However, the effect of osmolarity of extracellular medium on gap closure is least understood. Using a gap closure model of epithelial cells, we found that hypotonic condition significantly facilitated the process of gap closure. Moreover, instead of actomyosin ring, enhanced migration leading by lamellipodia primarily contributed to the rapid gap closure in hypotonic condition. These findings provide insights for understanding the physiology of epithelial gap closure.
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Affiliation(s)
- T Chen
- Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China; Department of Orthopaedics, Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi 530027, People's Republic of China
| | - H Zhao
- Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China
| | - L Gao
- College of Life Science, Hebei Normal University, Heibei 050024, People's Republic of China
| | - L Song
- Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China; College of Life Science, Hebei Normal University, Heibei 050024, People's Republic of China
| | - F Yang
- Department of Orthopaedics, Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi 530027, People's Republic of China
| | - J Du
- Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China; Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, People's Republic of China.
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39
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Jelcic M, Enyedi B, Xavier JB, Niethammer P. Image-Based Measurement of H 2O 2 Reaction-Diffusion in Wounded Zebrafish Larvae. Biophys J 2017; 112:2011-2018. [PMID: 28494970 DOI: 10.1016/j.bpj.2017.03.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/22/2017] [Accepted: 03/27/2017] [Indexed: 12/15/2022] Open
Abstract
Epithelial injury induces rapid recruitment of antimicrobial leukocytes to the wound site. In zebrafish larvae, activation of the epithelial NADPH oxidase Duox at the wound margin is required early during this response. Before injury, leukocytes are near the vascular region, that is, ∼100-300 μm away from the injury site. How Duox establishes long-range signaling to leukocytes is unclear. We conceived that extracellular hydrogen peroxide (H2O2) generated by Duox diffuses through the tissue to directly regulate chemotactic signaling in these cells. But before it can oxidize cellular proteins, H2O2 must get past the antioxidant barriers that protect the cellular proteome. To test whether, or on which length scales this occurs during physiological wound signaling, we developed a computational method based on reaction-diffusion principles that infers H2O2 degradation rates from intravital H2O2-biosensor imaging data. Our results indicate that at high tissue H2O2 levels the peroxiredoxin-thioredoxin antioxidant chain becomes overwhelmed, and H2O2 degradation stalls or ceases. Although the wound H2O2 gradient reaches deep into the tissue, it likely overcomes antioxidant barriers only within ∼30 μm of the wound margin. Thus, Duox-mediated long-range signaling may require other spatial relay mechanisms besides extracellular H2O2 diffusion.
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Affiliation(s)
- Mark Jelcic
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York; Louis V. Gerstner, Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Balázs Enyedi
- Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - João B Xavier
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York.
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40
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Garcia J, Bagwell J, Njaine B, Norman J, Levic DS, Wopat S, Miller SE, Liu X, Locasale JW, Stainier DYR, Bagnat M. Sheath Cell Invasion and Trans-differentiation Repair Mechanical Damage Caused by Loss of Caveolae in the Zebrafish Notochord. Curr Biol 2017. [PMID: 28648824 DOI: 10.1016/j.cub.2017.05.035] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The notochord, a conserved axial structure required for embryonic axis elongation and spine development, consists of giant vacuolated cells surrounded by an epithelial sheath [1-3]. During morphogenesis, vacuolated cells maintain their structural integrity despite being under constant mechanical stress [4]. We hypothesized that the high density of caveolae present in vacuolated cells [5, 6] could buffer mechanical tension. Caveolae are 50- to 80-nm membrane invaginations lined by cage-like polygonal structures [7, 8] formed by caveolin 1 (Cav1) or Cav3 and one of the cavin proteins [6, 9-11]. Recent in vitro work has shown that plasma membrane caveolae constitute a membrane reservoir that can buffer mechanical stresses such as stretching or osmotic swelling [12]. Moreover, mechanical integrity of vascular and muscle cells is partly dependent on caveolae [13-15]. However, the in vivo mechano-protective roles of caveolae have only begun to be explored. Using zebrafish mutants for cav1, cav3, and cavin1b, we show that caveolae are essential for notochord integrity. Upon loss of caveola function, vacuolated cells collapse at discrete positions under the mechanical strain of locomotion. Then, sheath cells invade the inner notochord and differentiate into vacuolated cells, thereby restoring notochord function and allowing normal spine development. Our data further indicate that nucleotides released by dying vacuolated cells promote sheath cell vacuolization and trans-differentiation. This work reveals a novel structural role for caveolae in vertebrates and provides unique insights into the mechanisms that safeguard notochord and spine development.
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Affiliation(s)
- Jamie Garcia
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Jennifer Bagwell
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Brian Njaine
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - James Norman
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Daniel S Levic
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Susan Wopat
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Sara E Miller
- Department of Pathology, Duke University, Durham, NC 27710, USA
| | - Xiaojing Liu
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27710, USA
| | - Jason W Locasale
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27710, USA
| | - Didier Y R Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Michel Bagnat
- Department of Cell Biology, Duke University, Durham, NC 27710, USA.
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41
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Boyko TV, Longaker MT, Yang GP. Laboratory Models for the Study of Normal and Pathologic Wound Healing. Plast Reconstr Surg 2017; 139:654-662. [PMID: 28234843 DOI: 10.1097/prs.0000000000003077] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Current knowledge of wound healing is based on studies using various in vitro and in vivo wound models. In vitro models allow for biological examination of specific cell types involved in wound healing. In vivo models generally provide the full spectrum of biological responses required for wound healing, including inflammation and angiogenesis, and provide cell-cell interactions not seen in vitro. In this review, the authors aim to delineate the most relevant wound healing models currently available and to discuss their strengths and limitations in their approximation of the human wound healing processes to aid scientists in choosing the most appropriate wound healing models for designing, testing, and validating their experiments.
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Affiliation(s)
- Tatiana V Boyko
- Stanford and Palo Alto, Calif.; and Buffalo, N.Y.,From the Hagey Laboratory for Pediatric Regenerative Medicine, the Department of Surgery, and the Institute of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine; the Palo Alto VA Health Care System; and the Department of Surgery, University at Buffalo, State University of New York
| | - Michael T Longaker
- Stanford and Palo Alto, Calif.; and Buffalo, N.Y.,From the Hagey Laboratory for Pediatric Regenerative Medicine, the Department of Surgery, and the Institute of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine; the Palo Alto VA Health Care System; and the Department of Surgery, University at Buffalo, State University of New York
| | - George P Yang
- Stanford and Palo Alto, Calif.; and Buffalo, N.Y.,From the Hagey Laboratory for Pediatric Regenerative Medicine, the Department of Surgery, and the Institute of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine; the Palo Alto VA Health Care System; and the Department of Surgery, University at Buffalo, State University of New York
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42
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Handly LN, Wollman R. Wound-induced Ca 2+ wave propagates through a simple release and diffusion mechanism. Mol Biol Cell 2017; 28:1457-1466. [PMID: 28404746 PMCID: PMC5449146 DOI: 10.1091/mbc.e16-10-0695] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 04/07/2017] [Accepted: 04/07/2017] [Indexed: 01/10/2023] Open
Abstract
Damage-associated molecular patterns (DAMPs) are critical mediators of information concerning tissue damage from damaged cells to neighboring healthy cells. ATP acts as an effective DAMP when released into extracellular space from damaged cells. Extracellular ATP receptors monitor tissue damage and activate a Ca2+ wave in the surrounding healthy cells. How the Ca2+ wave propagates through cells after a wound is unclear. Ca2+ wave activation can occur extracellularly via external receptors or intracellularly through GAP junctions. Three potential mechanisms to propagate the Ca2+ wave are source and sink, amplifying wave, and release and diffusion. Both source and sink and amplifying wave regulate ATP levels using hydrolysis or secretion, respectively, whereas release and diffusion relies on dilution. Here we systematically test these hypotheses using a microfluidics assay to mechanically wound an epithelial monolayer in combination with direct manipulation of ATP hydrolysis and release. We show that a release and diffusion model sufficiently explains Ca2+-wave propagation after an epithelial wound. A release and diffusion model combines the benefits of fast activation at short length scales with a self-limiting response to prevent unnecessary inflammatory responses harmful to the organism.
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Affiliation(s)
- L Naomi Handly
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095.,Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, CA 90095
| | - Roy Wollman
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095 .,Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, CA 90095.,Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095
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43
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Enyedi B, Niethammer P. Nuclear membrane stretch and its role in mechanotransduction. Nucleus 2017; 8:156-161. [PMID: 28112995 PMCID: PMC5403133 DOI: 10.1080/19491034.2016.1263411] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/13/2016] [Accepted: 11/17/2016] [Indexed: 10/20/2022] Open
Abstract
Most research in nuclear mechanotransduction has focused on the nuclear lamina and lamin binding proteins. These structures provide mechanical stability to the nucleus, establish a link between the cytoskeleton and chromatin, and can transmit mechanical signals. At the same time, mechanical perturbations to the nucleus also affect its phospholipid membranes. In this commentary, we discuss how changes in nuclear membrane tension can mediate mechanotransduction.
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Affiliation(s)
- Balázs Enyedi
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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44
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Schatz V, Neubert P, Schröder A, Binger K, Gebhard M, Müller DN, Luft FC, Titze J, Jantsch J. Elementary immunology: Na + as a regulator of immunity. Pediatr Nephrol 2017; 32:201-210. [PMID: 26921211 PMCID: PMC5203836 DOI: 10.1007/s00467-016-3349-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/28/2016] [Accepted: 01/29/2016] [Indexed: 12/13/2022]
Abstract
The skin can serve as an interstitial Na+ reservoir. Local tissue Na+ accumulation increases with age, inflammation and infection. This increased local Na+ availability favors pro-inflammatory immune cell function and dampens their anti-inflammatory capacity. In this review, we summarize available data on how NaCl affects various immune cells. We particularly focus on how salt promotes pro-inflammatory macrophage and T cell function and simultaneously curtails their regulatory and anti-inflammatory potential. Overall, these findings demonstrate that local Na+ availability is a promising novel regulator of immunity. Hence, the modulation of tissue Na+ levels bears broad therapeutic potential: increasing local Na+ availability may help in treating infections, while lowering tissue Na+ levels may be used to treat, for example, autoimmune and cardiovascular diseases.
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Affiliation(s)
- Valentin Schatz
- Institute of Clinical Microbiology and Hygiene, Universitätsklinikum Regensburg-Universität Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Patrick Neubert
- Institute of Clinical Microbiology and Hygiene, Universitätsklinikum Regensburg-Universität Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Agnes Schröder
- Department of Nephrology and Hypertension, Universitätsklinikum Erlangen-Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Katrina Binger
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - Matthias Gebhard
- Experimental and Clinical Research Center (ECRC), Research Building, Charité Lindenberger Weg 80, Berlin, Germany
- Max-Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Dominik N Müller
- Experimental and Clinical Research Center (ECRC), Research Building, Charité Lindenberger Weg 80, Berlin, Germany
- Max-Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Friedrich C Luft
- Experimental and Clinical Research Center (ECRC), Research Building, Charité Lindenberger Weg 80, Berlin, Germany
- Max-Delbrück Center for Molecular Medicine, Berlin, Germany
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jens Titze
- Department of Nephrology and Hypertension, Universitätsklinikum Erlangen-Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, Universitätsklinikum Regensburg-Universität Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany.
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45
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Lisse TS, Rieger S. IKKα regulates human keratinocyte migration through surveillance of the redox environment. J Cell Sci 2017; 130:975-988. [PMID: 28122935 PMCID: PMC5358334 DOI: 10.1242/jcs.197343] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/16/2017] [Indexed: 02/06/2023] Open
Abstract
Although the functions of H2O2 in epidermal wound repair are conserved throughout evolution, the underlying signaling mechanisms are largely unknown. In this study we used human keratinocytes (HEK001) to investigate H2O2-dependent wound repair mechanisms. Scratch wounding led to H2O2 production in two or three cell layers at the wound margin within ∼30 min and subsequent cysteine modification of proteins via sulfenylation. Intriguingly, exogenous H2O2 treatment resulted in preferential sulfenylation of keratinocytes that adopted a migratory phenotype and detached from neighboring cells, suggesting that one of the primary functions of H2O2 is to stimulate signaling factors involved in cell migration. Based on previous findings that revealed epidermal growth factor receptor (EGFR) involvement in H2O2-dependent cell migration, we analyzed oxidation of a candidate upstream target, the inhibitor of κB kinase α (IKKα; encoded by CHUK), as a mechanism of action. We show that IKKα is sulfenylated at a conserved cysteine residue in the kinase domain, which correlates with de-repression of EGF promoter activity and increased EGF expression. Thus, this indicates that IKKα promotes migration through dynamic interactions with the EGF promoter depending on the redox state within cells. Summary: This study provides a newly identified mechanism by which H2O2-dependent oxidation of the inhibitor of κB kinase α and de-repression of epidermal growth factor promoter activity stimulates keratinocyte migration.
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Affiliation(s)
- Thomas S Lisse
- Davis Center for Regenerative Biology and Medicine, MDI Biological Laboratory, 159 Old Bar Harbor Road, Salisbury Cove, ME 04672, USA .,The Jackson Laboratory, Bar Harbor, ME 04609, USA
| | - Sandra Rieger
- Davis Center for Regenerative Biology and Medicine, MDI Biological Laboratory, 159 Old Bar Harbor Road, Salisbury Cove, ME 04672, USA
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46
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The Cell Nucleus Serves as a Mechanotransducer of Tissue Damage-Induced Inflammation. Cell 2016; 165:1160-1170. [PMID: 27203112 DOI: 10.1016/j.cell.2016.04.016] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/18/2016] [Accepted: 04/01/2016] [Indexed: 01/14/2023]
Abstract
Tissue damage activates cytosolic phospholipase A2 (cPLA2), releasing arachidonic acid (AA), which is oxidized to proinflammatory eicosanoids by 5-lipoxygenase (5-LOX) on the nuclear envelope. How tissue damage is sensed to activate cPLA2 is unknown. We investigated this by live imaging in wounded zebrafish larvae, where damage of the fin tissue causes osmotic cell swelling at the wound margin and the generation of a chemotactic eicosanoid signal. Osmotic swelling of cells and their nuclei activates cPla2 by translocating it from the nucleoplasm to the nuclear envelope. Elevated cytosolic Ca(2+) was necessary but not sufficient for cPla2 translocation, and nuclear swelling was required in parallel. cPla2 translocation upon nuclear swelling was reconstituted in isolated nuclei and appears to be a simple physical process mediated by tension in the nuclear envelope. Our data suggest that the nucleus plays a mechanosensory role in inflammation by transducing cell swelling and lysis into proinflammatory eicosanoid signaling.
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47
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Richardson R, Hammerschmidt M. The role of Rho kinase (Rock) in re-epithelialization of adult zebrafish skin wounds. Small GTPases 2016; 9:230-236. [PMID: 27487414 PMCID: PMC5927524 DOI: 10.1080/21541248.2016.1219208] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Complete re-epithelialization of full-thickness skin wounds in adult mammals takes days to complete and relies on numerous signaling cues and multiple overlapping cellular processes that take place both within the epidermis itself and in other participating tissues. We have previously shown that re-epithelialization of full-thickness skin wounds of adult zebrafish, however, is extremely rapid and largely independent of the other processes of wound healing allowing for the dissection of specific processes that occur in, or have a direct effect on, re-epithelializing keratinocytes. Recently, we have shown that, in addition to lamellipodial crawling at the leading edge, re-epithelialization of zebrafish partial- and full-thickness wounds requires long-range epithelial rearrangements including radial intercalations, flattening and directed elongation and that each of these processes involves Rho kinase (Rock) signaling. Our studies demonstrate how these coordinated signaling events allow for the rapid collective cell migration observed in adult zebrafish wound healing. Here we discuss the particular contribution of Rock to each of these processes.
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Affiliation(s)
- Rebecca Richardson
- a School of Physiology, Pharmacology & Neuroscience, Faculty of Biomedical Sciences, University of Bristol , Bristol , UK
| | - Matthias Hammerschmidt
- b Institute of Developmental Biology, University of Cologne , Cologne , Germany.,c Center for Molecular Medicine Cologne, University of Cologne , Cologne , Germany.,d Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne , Cologne , Germany
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48
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Niethammer P. The early wound signals. Curr Opin Genet Dev 2016; 40:17-22. [PMID: 27266971 PMCID: PMC5278878 DOI: 10.1016/j.gde.2016.05.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/02/2016] [Accepted: 05/06/2016] [Indexed: 01/08/2023]
Abstract
Wounding of tissue barriers, such as epithelia, disrupts homeostasis and allows infection. Within minutes, animals detect injury and respond to it by recruitment of phagocytes and barrier breach closure. The signals that activate these first events are scarcely known. Commonly considered are cytoplasmic factors released into the extracellular space by lysing cells (Damage Associated Molecular Patterns, DAMPs). DAMPs activate inflammatory gene transcription through pattern recognition receptors. But the promptness of wound responses is difficult to explain by transcriptional mechanisms alone. This review highlights the emerging role of nonlytic stress signals in the rapid detection of wounds.
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Affiliation(s)
- Philipp Niethammer
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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49
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Richardson R, Metzger M, Knyphausen P, Ramezani T, Slanchev K, Kraus C, Schmelzer E, Hammerschmidt M. Re-epithelialization of cutaneous wounds in adult zebrafish combines mechanisms of wound closure in embryonic and adult mammals. Development 2016; 143:2077-88. [PMID: 27122176 DOI: 10.1242/dev.130492] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 04/12/2016] [Indexed: 01/08/2023]
Abstract
Re-epithelialization of cutaneous wounds in adult mammals takes days to complete and relies on numerous signalling cues and multiple overlapping cellular processes that take place both within the epidermis and in other participating tissues. Re-epithelialization of partial- or full-thickness skin wounds of adult zebrafish, however, is extremely rapid and largely independent of the other processes of wound healing. Live imaging after treatment with transgene-encoded or chemical inhibitors reveals that re-epithelializing keratinocytes repopulate wounds by TGF-β- and integrin-dependent lamellipodial crawling at the leading edges of the epidermal tongue. In addition, re-epithelialization requires long-range epithelial rearrangements, involving radial intercalations, flattening and directed elongation of cells - processes that are dependent on Rho kinase, JNK and, to some extent, planar cell polarity within the epidermis. These rearrangements lead to a massive recruitment of keratinocytes from the adjacent epidermis and make re-epithelialization independent of keratinocyte proliferation and the mitogenic effect of FGF signalling, which are only required after wound closure, allowing the epidermis outside the wound to re-establish its normal thickness. Together, these results demonstrate that the adult zebrafish is a valuable in vivo model for studying and visualizing the processes involved in cutaneous wound closure, facilitating the dissection of direct from indirect and motogenic from mitogenic effects of genes and molecules affecting wound re-epithelialization.
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Affiliation(s)
- Rebecca Richardson
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany
| | - Manuel Metzger
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany
| | - Philipp Knyphausen
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany Graduate School for Biological Sciences, University of Cologne, Cologne D-50674, Germany
| | - Thomas Ramezani
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany
| | - Krasimir Slanchev
- Georges-Koehler Laboratory, Max-Planck Institute of Immunobiology and Epigenetics, Freiburg D-79108, Germany
| | - Christopher Kraus
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany
| | - Elmon Schmelzer
- Cell Biology, Max-Planck Institute for Plant Breeding Research, Cologne D-50829, Germany
| | - Matthias Hammerschmidt
- Institute of Developmental Biology, University of Cologne, Cologne D-50674, Germany Center for Molecular Medicine Cologne, University of Cologne, Cologne D-50931, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne D-50931, Germany
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50
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Riding A, Pullar CE. ATP Release and P2 Y Receptor Signaling are Essential for Keratinocyte Galvanotaxis. J Cell Physiol 2016; 231:181-91. [PMID: 26058714 DOI: 10.1002/jcp.25070] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 06/05/2015] [Indexed: 01/06/2023]
Abstract
Repair to damaged tissue requires directional cell migration to heal the wound. Immediately upon wounding an electrical guidance cue is created with the cathode of the electric field (EF) located at the center of the wound. Previous research has demonstrated directional migration of keratinocytes toward the cathode when an EF of physiological strength (100-150 mV/mm) is applied in vitro, but the "sensor" by which keratinocytes sense the EF remains elusive. Here we use a customized chamber design to facilitate the application of a direct current (DC) EF of physiological strength (100 mV/mm) to keratinocytes whilst pharmacologically modulating the activation of both connexin hemichannels and purinergic receptors to determine their role in EF-mediated directional keratinocyte migration, galvanotaxis. In addition, keratinocytes were exposed to DiSCAC2 (3) dye to visualize membrane potential changes within the cell upon exposure to the applied DC EF. Here we unveil ATP-medicated mechanisms that underpin the initiation of keratinocyte galvanotaxis. The application of a DC EF of 100 mV/mm releases ATP via hemichannels activating a subset of purinergic P2 Y receptors, locally, to initiate the directional migration of keratinocytes toward the cathode in vitro, the center of the wound in vivo. The delineation of the mechanisms underpinning galvanotaxis extends our understanding of this endogenous cue and will facilitate the optimization and wider use of EF devices for chronic wound treatment. J. Cell. Physiol. 230: 181-191, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Aimie Riding
- Department of Cell Physiology and Pharmacology, University of Leicester, Leicester, UK
| | - Christine E Pullar
- Department of Cell Physiology and Pharmacology, University of Leicester, Leicester, UK
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