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Cernat EM, Neagu A, Betianu C, Manolescu LSC, Avram G, Pogarasteanu ME, Barbilian A. Balancing Anterior and Posterior Cruciate Ligaments in Adults. Cureus 2024; 16:e59683. [PMID: 38711864 PMCID: PMC11070883 DOI: 10.7759/cureus.59683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND The anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) represent the central pivot of the knee. The balance between these two ligaments impacts the tibiofemoral biomechanics. Each structure is the opposite of the other in terms of anteroposterior translation and rotation. AIM The aim of this study was to find a correlation between the cross-sectional area of the ACL and PCL in adults. MATERIAL AND METHODS Magnetic resonance imaging (MRI) data analysis was conducted by a musculoskeletal radiologist using MRI planes tailored to the study's requirements. In all 62 studied patients, measurements were done according to the protocol. RESULTS The study observed three types of intercondylar notches: Type U was identified in 35% (22) of patients, type W in 27% (17), and type A in 37% (23). The median difference between the ACL and PCL areas was found to be statistically significant (p = 0.02). A significant difference in the area of the ACL was detected between Type A and Type U notches (p = 0.02), while no significant differences were found between Type A-W and Type W-U after post hoc corrections (p > 0.05). Additionally, no significant difference was observed in the mean area of the PCL across all three notch types (p = 0.1). In 68% of the cases, the ACL is no less than 60% of the PCL in area, and no more than 120%. The size of ACL and PCL in healthy individuals also depends on other factors like synergistic and antagonistic muscle activities, occupation, and the hip-knee-ankle axis. For example, if the PCL area is 0.79 cm² and the measured structure is round (during a reconstruction a hamstring graft is round), the diameter is 10 mm. A native ACL is, in 68% of the cases, no less than 7.7 mm, and no more than 10.9 mm. CONCLUSION The ACL-PCL size correlation helps in understanding the balance of the central pivot of the knee.
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Affiliation(s)
- Eduard M Cernat
- Department of Clinical Education, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, ROU
- Department of Orthopaedics, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
| | - Andrei Neagu
- Department of Radiology, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
| | - Cezar Betianu
- Department of Radiology, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
| | | | - George Avram
- Department of Clinical Education, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, ROU
- Department of Orthopaedics, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
| | - Mark-Edward Pogarasteanu
- Department of Clinical Education, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, ROU
- Department of Orthopaedics, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
| | - Adrian Barbilian
- Department of Clinical Education, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, ROU
- Department of Orthopaedics, Doctor Carol Davila Central Military University Emergency Hospital, Bucharest, ROU
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Moser C, Guschtschin-Schmidt N, Silber M, Flum J, Muhle-Goll C. Substrate Selection Criteria in Regulated Intramembrane Proteolysis. ACS Chem Neurosci 2024; 15:1321-1334. [PMID: 38525994 DOI: 10.1021/acschemneuro.4c00068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
Alzheimer's disease is the most common form of dementia encountered in an aging population. Characteristic amyloid deposits of Aβ peptides in the brain are generated through cleavage of amyloid precursor protein (APP) by γ-secretase, an intramembrane protease. Cryo-EM structures of substrate γ-secretase complexes revealed details of the process, but how substrates are recognized and enter the catalytic site is still largely ignored. γ-Secretase cleaves a diverse range of substrate sequences without a common consensus sequence, but strikingly, single point mutations within the transmembrane domain (TMD) of specific substrates may greatly affect cleavage efficiencies. Previously, conformational flexibility was hypothesized to be the main criterion for substrate selection. Here we review the 3D structure and dynamics of several γ-secretase substrate TMDs and compare them with mutants shown to affect the cleavage efficiency. In addition, we present structural and dynamic data on ITGB1, a known nonsubstrate of γ-secretase. A comparison of biophysical details between these TMDs and changes generated by introducing crucial mutations allowed us to unravel common principles that differ between substrates and nonsubstrates. We identified three motifs in the investigated substrates: a highly flexible transmembrane domain, a destabilization of the cleavage region, and a basic signature at the end of the transmembrane helix. None of these appears to be exclusive. While conformational flexibility on its own may increase cleavage efficiency in well-known substrates like APP or Notch1, our data suggest that the three motifs seem to be rather variably combined to determine whether a transmembrane helix is efficiently recognized as a γ-secretase substrate.
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Affiliation(s)
- Celine Moser
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Nadja Guschtschin-Schmidt
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Mara Silber
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Julia Flum
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Claudia Muhle-Goll
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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Quadros-Mennella PS, Lucin KM, White RE. What can the common fruit fly teach us about stroke?: lessons learned from the hypoxic tolerant Drosophila melanogaster. Front Cell Neurosci 2024; 18:1347980. [PMID: 38584778 PMCID: PMC10995290 DOI: 10.3389/fncel.2024.1347980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/08/2024] [Indexed: 04/09/2024] Open
Abstract
Stroke, resulting in hypoxia and glucose deprivation, is a leading cause of death and disability worldwide. Presently, there are no treatments that reduce neuronal damage and preserve function aside from tissue plasminogen activator administration and rehabilitation therapy. Interestingly, Drosophila melanogaster, the common fruit fly, demonstrates robust hypoxic tolerance, characterized by minimal effects on survival and motor function following systemic hypoxia. Due to its organized brain, conserved neurotransmitter systems, and genetic similarity to humans and other mammals, uncovering the mechanisms of Drosophila's tolerance could be a promising approach for the development of new therapeutics. Interestingly, a key facet of hypoxic tolerance in Drosophila is organism-wide metabolic suppression, a response involving multiple genes and pathways. Specifically, studies have demonstrated that pathways associated with oxidative stress, insulin, hypoxia-inducible factors, NFκB, Wnt, Hippo, and Notch, all potentially contribute to Drosophila hypoxic tolerance. While manipulating the oxidative stress response and insulin signaling pathway has similar outcomes in Drosophila hypoxia and the mammalian middle cerebral artery occlusion (MCAO) model of ischemia, effects of Notch pathway manipulation differ between Drosophila and mammals. Additional research is warranted to further explore how other pathways implicated in hypoxic tolerance in Drosophila, such as NFκB, and Hippo, may be utilized to benefit mammalian response to ischemia. Together, these studies demonstrate that exploration of the hypoxic response in Drosophila may lead to new avenues of research for stroke treatment in humans.
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Affiliation(s)
| | - Kurt M. Lucin
- Department of Biology, Eastern Connecticut State University, Willimantic, CT, United States
| | - Robin E. White
- Department of Biology, Westfield State University, Westfield, MA, United States
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Castro Colabianchi AM, González Pérez NG, Franchini LF, López SL. A maternal dorsoventral prepattern revealed by an asymmetric distribution of ventralizing molecules before fertilization in Xenopus laevis. Front Cell Dev Biol 2024; 12:1365705. [PMID: 38572484 PMCID: PMC10987785 DOI: 10.3389/fcell.2024.1365705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/07/2024] [Indexed: 04/05/2024] Open
Abstract
The establishment of the embryonic dorsoventral axis in Xenopus occurs when the radial symmetry around the egg's animal-vegetal axis is broken to give rise to the typical symmetry of Bilaterians. We have previously shown that the Notch1 protein is ventrally enriched during early embryogenesis in Xenopus laevis and zebrafish and exerts ventralizing activity through β-Catenin destabilization and the positive regulation of ventral center genes in X. laevis. These findings led us to further investigate when these asymmetries arise. In this work, we show that the asymmetrical distribution of Notch1 protein and mRNA precedes cortical rotation and even fertilization in X. laevis. Moreover, we found that in unfertilized eggs transcripts encoded by the ventralizing gene bmp4 are also asymmetrically distributed in the animal hemisphere and notch1 transcripts accumulate consistently on the same side of the eccentric maturation point. Strikingly, a Notch1 asymmetry orthogonal to the animal-vegetal axis appears during X. laevis oogenesis. Thus, we show for the first time a maternal bias in the distribution of molecules that are later involved in ventral patterning during embryonic axialization, strongly supporting the hypothesis of a dorsoventral prepattern or intrinsic bilaterality of Xenopus eggs before fertilization.
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Affiliation(s)
- Aitana M. Castro Colabianchi
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Biología Celular e Histología / 1° U.A. Departamento de Histología, Embriología, Biología Celular y Genética, Laboratorio de Embriología Molecular “Prof. Dr. Andrés E. Carrasco”, Buenos Aires, Argentina
- CONICET–Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencias “Prof. E. De Robertis” (IBCN), Buenos Aires, Argentina
| | - Nicolás G. González Pérez
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Biología Celular e Histología / 1° U.A. Departamento de Histología, Embriología, Biología Celular y Genética, Laboratorio de Embriología Molecular “Prof. Dr. Andrés E. Carrasco”, Buenos Aires, Argentina
- CONICET–Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencias “Prof. E. De Robertis” (IBCN), Buenos Aires, Argentina
| | - Lucía F. Franchini
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI) “Dr. Héctor N. Torres”, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Silvia L. López
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Biología Celular e Histología / 1° U.A. Departamento de Histología, Embriología, Biología Celular y Genética, Laboratorio de Embriología Molecular “Prof. Dr. Andrés E. Carrasco”, Buenos Aires, Argentina
- CONICET–Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencias “Prof. E. De Robertis” (IBCN), Buenos Aires, Argentina
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Wang J, Xue H, Yi X, Kim H, Hao Y, Jin LH. InR and Pi3K maintain intestinal homeostasis through STAT/EGFR and Notch signaling in enteroblasts. J Cell Biochem 2024. [PMID: 38436545 DOI: 10.1002/jcb.30545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/05/2024] [Accepted: 02/22/2024] [Indexed: 03/05/2024]
Abstract
To maintain the integrity of the adult gut, the proliferation and differentiation of stem cells must be strictly controlled. Several signaling pathways control the proliferation and differentiation of Drosophila intestinal epithelial cells. Although the modulatory effects of insulin pathway components on cell proliferation have been characterized, their specific role in which cell type and how these components interact with other regulatory signaling pathways remain largely unclear. In this study, we found that InR/Pi3K has major functions in enteroblasts (EBs) that were not previously described. The absence of InR/Pi3K in progenitors leads to a decrease in the number of EBs, while it has no significant effect on intestinal stem cells (ISCs). In addition, we found that InR/Pi3K regulates Notch activity in ISCs and EBs in an opposite way. This is also the reason for the decrease in EB. On the one hand, aberrantly low levels of Notch signaling in ISCs inhibit their proper differentiation into EBs; on the other hand, the higher Notch levels in EBs promote their excessive differentiation into enterocytes (ECs), leading to marked increases in abnormal ECs and decreased proliferation. Moreover, we found that Upd/JAK/STAT signaling acts as an effector or modifier of InR/Pi3K function in the midgut and cooperates with EGFR signaling to regulate cell proliferation. Altogether, our results demonstrate that InR and Pi3K are essential for coordinating stem cell differentiation and proliferation to maintain intestinal homeostasis.
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Affiliation(s)
- Jiewei Wang
- Department of Genetics, College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Hongmei Xue
- Department of Children's Emergency Medicine, Women's and Children's Hospital Affiliated to Qingdao University, Qingdao, China
| | - Xinyu Yi
- Department of Genetics, College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Hyonil Kim
- Department of Genetics, College of Life Sciences, Northeast Forestry University, Harbin, China
- College of Life Science, Kim ll Sung University, Pyongyang, North Korea
| | - Yangguang Hao
- Department of Basic Medical, Shenyang Medical College, Shenyang, China
| | - Li Hua Jin
- Department of Genetics, College of Life Sciences, Northeast Forestry University, Harbin, China
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Kwon YW, Markoff EK, DeFisher S. Unified Failure Criterion Based on Stress and Stress Gradient Conditions. Materials (Basel) 2024; 17:569. [PMID: 38591389 PMCID: PMC10856633 DOI: 10.3390/ma17030569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 04/10/2024]
Abstract
Specimens made of various materials with different geometric features were investigated to predict the failure loads using the recently proposed criterion comprised of both stress and stress gradient conditions. The notch types were cracks and holes, and the materials were brittle, ductile, isotropic, orthotropic, or fibrous composites. The predicted failure stresses or loads were compared to experimental results, and both experimental and theoretically predicted results agreed well for all the different cases. This suggests that the stress and stress-gradient-based failure criterion is both versatile and accurate in predicting the failure of various materials and geometric features.
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Affiliation(s)
- Young W. Kwon
- Department of Mechanical & Aerospace Engineering, Naval Postgraduate School, Monterey, CA 93943, USA
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7
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Sunshine HL, Cicchetto AC, Kaczor-Urbanowicz KE, Ma F, Pi D, Symons C, Turner M, Shukla V, Christofk HR, Vallim TA, Iruela-Arispe ML. Endothelial Jagged1 levels and distribution are post-transcriptionally controlled by ZFP36 decay proteins. Cell Rep 2024; 43:113627. [PMID: 38157296 PMCID: PMC10884959 DOI: 10.1016/j.celrep.2023.113627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 11/02/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024] Open
Abstract
Vascular morphogenesis requires a delicate gradient of Notch signaling controlled, in part, by the distribution of ligands (Dll4 and Jagged1). How Jagged1 (JAG1) expression is compartmentalized in the vascular plexus remains unclear. Here, we show that Jag1 mRNA is a direct target of zinc-finger protein 36 (ZFP36), an RNA-binding protein involved in mRNA decay that we find robustly induced by vascular endothelial growth factor (VEGF). Endothelial cells lacking ZFP36 display high levels of JAG1 and increase angiogenic sprouting in vitro. Furthermore, mice lacking Zfp36 in endothelial cells display mispatterned and increased levels of JAG1 in the developing retinal vascular plexus. Abnormal levels of JAG1 at the sprouting front alters NOTCH1 signaling, increasing the number of tip cells, a phenotype that is rescued by imposing haploinsufficiency of Jag1. Our findings reveal an important feedforward loop whereby VEGF stimulates ZFP36, consequently suppressing Jag1 to enable adequate levels of Notch signaling during sprouting angiogenesis.
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Affiliation(s)
- Hannah L Sunshine
- Molecular, Cellular, and Integrative Physiology Graduate Program, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Cell and Development Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Andrew C Cicchetto
- Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Karolina Elżbieta Kaczor-Urbanowicz
- Center for Oral and Head/Neck Oncology Research, UCLA Biosystems & Function, UCLA School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095-1668, USA; UCLA Section of Orthodontics, UCLA School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; UCLA Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Feiyang Ma
- Department of Cell and Development Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Danielle Pi
- Department of Cell and Development Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Chloe Symons
- Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Martin Turner
- Immunology Programme, The Babraham Institute, CB22 3AT Cambridge, UK
| | - Vipul Shukla
- Department of Cell and Development Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Center for Human Immunobiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Heather R Christofk
- Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095-1606, USA
| | - Thomas A Vallim
- Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095-1606, USA
| | - M Luisa Iruela-Arispe
- Department of Cell and Development Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Xu C, Ramos TB, Marshall OJ, Doe CQ. Notch signaling and Bsh homeodomain activity are integrated to diversify Drosophila lamina neuron types. eLife 2024; 12:RP90136. [PMID: 38193901 PMCID: PMC10945509 DOI: 10.7554/elife.90136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024] Open
Abstract
Notch signaling is an evolutionarily conserved pathway for specifying binary neuronal fates, yet how it specifies different fates in different contexts remains elusive. In our accompanying paper, using the Drosophila lamina neuron types (L1-L5) as a model, we show that the primary homeodomain transcription factor (HDTF) Bsh activates secondary HDTFs Ap (L4) and Pdm3 (L5) and specifies L4/L5 neuronal fates. Here we test the hypothesis that Notch signaling enables Bsh to differentially specify L4 and L5 fates. We show asymmetric Notch signaling between newborn L4 and L5 neurons, but they are not siblings; rather, Notch signaling in L4 is due to Delta expression in adjacent L1 neurons. While Notch signaling and Bsh expression are mutually independent, Notch is necessary and sufficient for Bsh to specify L4 fate over L5. The NotchON L4, compared to NotchOFF L5, has a distinct open chromatin landscape which allows Bsh to bind distinct genomic loci, leading to L4-specific identity gene transcription. We propose a novel model in which Notch signaling is integrated with the primary HDTF activity to diversify neuron types by directly or indirectly generating a distinct open chromatin landscape that constrains the pool of genes that a primary HDTF can activate.
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Affiliation(s)
- Chundi Xu
- Institute of Neuroscience, Howard Hughes Medical Institute, University of OregonEugeneUnited States
| | - Tyler B Ramos
- Institute of Neuroscience, Howard Hughes Medical Institute, University of OregonEugeneUnited States
| | - Owen J Marshall
- Menzies Institute for Medical Research, University of TasmaniaHobartAustralia
| | - Chris Q Doe
- Institute of Neuroscience, Howard Hughes Medical Institute, University of OregonEugeneUnited States
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Stabell SH, Renzi A, Nilsen HR, Antonsen OH, Fosse JH, Haraldsen G, Sundnes O. Detection of native, activated Notch receptors in normal human apocrine-bearing skin and in hidradenitis suppurativa. Exp Dermatol 2024; 33:e14977. [PMID: 38060347 DOI: 10.1111/exd.14977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/30/2023] [Accepted: 11/05/2023] [Indexed: 01/30/2024]
Abstract
Notch signalling has generated considerable interest as a pathogenetic factor and a drug target in a range of human diseases. The gamma-secretase complex is crucial in the activation of Notch receptors by cleaving the intracellular domain allowing nuclear translocation. In recent years several mutations in gamma-secretase components have been discovered in patients with familial hidradenitis suppurativa (HS). This has led to hypotheses that impaired Notch signalling could be an important driver for HS in general, not only in the monogenic variants. However, no study has examined in situ Notch activation per se in HS, and some reports with conflicting results have instead been based on expression of Notch receptors or indirect measures of Notch target gene expression. In this study we established immunostaining protocols to identify native, activated Notch receptors in human skin tissue. The ability to detect changes in Notch activation was confirmed with an ex vivo skin organ model in which signal was reduced or obliterated in tissue exposed to a gamma-secretase inhibitor. Using these methods on skin biopsies from healthy volunteers and a general HS cohort we demonstrated for the first time the distribution of active Notch signalling in human apocrine-bearing skin. Quantification of activated NOTCH1 & NOTCH2 revealed similar levels in non-lesional and peri-lesional HS to that of healthy controls, thus ruling out a general defect in Notch activation in HS patients. We did find a variable but significant reduction of activated Notch in epidermis of lesional HS with a distribution that appeared related to the extent of surrounding tissue inflammation.
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Affiliation(s)
- Siri Hansen Stabell
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Dermatology, Oslo University Hospital, Oslo, Norway
- Department of Pathology, Oslo University Hospital, Oslo, Norway
| | - Anastasia Renzi
- Department of Pathology, Oslo University Hospital, Oslo, Norway
| | | | | | | | - Guttorm Haraldsen
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Pathology, Oslo University Hospital, Oslo, Norway
| | - Olav Sundnes
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Dermatology, Oslo University Hospital, Oslo, Norway
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Aarhus L, Molaug I, Engdahl B. No accelerated 20-year hearing decline after occupational noise exposure has ceased: The HUNT study. Am J Ind Med 2024; 67:10-17. [PMID: 37830428 DOI: 10.1002/ajim.23543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/06/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023]
Abstract
OBJECTIVES It has been suggested that noise exposure can accelerate hearing decline after the noise exposure has ceased. We aimed to assess long-term hearing decline in persons with and without prior occupational noise exposure. METHODS We conducted a population-based longitudinal study in Norway using the Trøndelag Health Study (HUNT) from 1996 to 1998 (baseline) and from 2017 to 2019 (follow-up). The sample included 1648 participants with baseline age ≥55 years (42% men, mean age 60 years) and <5 years occupational noise exposure after baseline. We analyzed the association between occupational noise exposure before baseline and mean hearing decline between 1998 and 2018 (20-year decline) at each frequency, adjusted for age, sex, education, and impulse noise exposure before baseline. RESULTS Occupational noise exposure before baseline (N = 603) was associated with baseline hearing loss, but not with later accelerated 20-year decline, at any frequency. Noise-exposed persons had less subsequent 20-year decline at 3 kHz than did nonexposed. Restricting the noise-exposed group to persons who also had a baseline Coles notch (hearing thresholds at 3, 4, or 6 kHz of 10 dB or more compared with thresholds at 1 or 2 kHz and 6 or 8 kHz; N = 211), the exposed group showed less 20-year decline at both 3 and 4 kHz, as well as less accelerated 20-year decline at 8 kHz, compared with the nonexposed. CONCLUSION Our large long-term longitudinal study shows no increased risk of continuing hearing decline after occupational noise exposure has ceased. The finding supports a conclusion that ear damage stops when the noise exposure is ended.
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Affiliation(s)
- Lisa Aarhus
- Department of Occupational Medicine and Epidemiology, National Institute of Occupational Health, Oslo, Norway
- Department of Internal Medicine, Diakonhjemmet Hospital, Oslo, Norway
| | - Ina Molaug
- Department of Occupational Medicine and Epidemiology, National Institute of Occupational Health, Oslo, Norway
| | - Bo Engdahl
- Department of Physical Health and Ageing, Norwegian Institute of Public Health, Oslo, Norway
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11
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Yang Z, Ma J, Li Z, Wang J, Shi Z. Cellular and molecular mechanisms of Notch signal in pulmonary microvascular endothelial cells after acute lung injury. Braz J Med Biol Res 2023; 56:e12888. [PMID: 38126616 PMCID: PMC10739178 DOI: 10.1590/1414-431x2023e12888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023] Open
Abstract
This study focused on the effect and mechanism of Notch signal on pulmonary microvascular endothelial cells (PMVECs) following acute lung injury. PMVECs were cultured in vitro and randomly divided into eight groups. Grouping was based on whether cells were co-cultured with T cells (splenic CD4+T cells were isolated using MACS microbeads) and the level of Notch expression: Normal group and Normal+T cells group, Model group and Model+T cells group, Notch low-expression group and Notch low-expression+T cells group, and Notch overexpression group and Notch overexpression+T cells group. Except for the Normal group and Normal+T cells group, all other groups were treated with 500 μL lipopolysaccharide (1 μg/mL). The expression of VE-cadherin and Zo-1 protein in the Model group (with or without T cells) was lower than that in the normal group (with or without T cells), their expression in the Notch low-expression group (with or without T cells) was significantly increased, and their expression in the Notch overexpression group (with or without T cells) was significantly decreased. Compared with the normal+T cells group, the number of Treg cells in the Notch low-expression+T cells group decreased significantly (P<0.01). The number of Th17 cells in the Notch overexpression+T cells group was higher than that in the Model+T cells group (P<0.01), while the number of Treg cells decreased (P<0.01). Our results demonstrated that activated Notch signal can down-regulate the expression of the tight junction proteins VE-Cadherin and Zo-1 in PMVECs and affect Th17/Treg immune imbalance. Autophagy was discovered to be involved in this process.
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Affiliation(s)
- Zheng Yang
- Department of Intensive Care Unit, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, China
| | - Jilin Ma
- Department of Rheumatism and Immunology, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, China
| | - Zhihui Li
- Department of Intensive Care Unit, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, China
| | - Jie Wang
- Department of Intensive Care Unit, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, China
| | - Zhanli Shi
- Department of Intensive Care Unit, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, China
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12
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Hounjet J, Groot AJ, Piepers JP, Kranenburg O, Zwijnenburg DA, Rapino FA, Koster JB, Kampen KR, Vooijs MA. Iron-responsive element of Divalent metal transporter 1 (Dmt1) controls Notch-mediated cell fates. FEBS J 2023; 290:5811-5834. [PMID: 37646174 DOI: 10.1111/febs.16946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 07/12/2023] [Accepted: 08/29/2023] [Indexed: 09/01/2023]
Abstract
Notch receptor activation is regulated by the intramembrane protease γ-secretase, which cleaves and liberates the Notch intracellular domain (Nicd) that regulates gene transcription. While γ-secretase cleavage is necessary, we demonstrate it is insufficient for Notch activation and requires vesicular trafficking. Here, we report Divalent metal transporter 1 (Dmt1, Slc11A2) as a novel and essential regulator of Notch signalling. Dmt1-deficient cells are defective in Notch signalling and have perturbed endolysosomal trafficking and function. Dmt1 encodes for two isoforms, with and without an iron response element (ire). We show that isoform-specific silencing of Dmt1-ire and Dmt1+ire has opposite consequences on Notch-dependent cell fates in cell lines and intestinal organoids. Loss of Dmt1-ire suppresses Notch activation and promotes differentiation, whereas loss of Dmt1+ire causes Notch activation and maintains stem-progenitor cell fates. Dmt1 isoform expression correlates with Notch and Wnt signalling in Apc-deficient intestinal organoids and human colorectal cancers. Consistently, Dmt1-ire silencing induces Notch-dependent differentiation in colorectal cancer cells. These data identify Dmt1 isoforms as binary switches controlling Notch cell fate decisions in normal and tumour cells.
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Affiliation(s)
- Judith Hounjet
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Arjan J Groot
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Jolanda P Piepers
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Onno Kranenburg
- Lab Translational Oncology, Division Imaging and Cancer, University Medical Center Utrecht, The Netherlands
| | - Danny A Zwijnenburg
- Center for Experimental and Molecular Medicine, Amsterdam UMC Location University of Amsterdam, The Netherlands
| | - Francesca A Rapino
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Pharmacy, Giga Stem Cells, University of Liege, Belgium
| | - Jan B Koster
- Center for Experimental and Molecular Medicine, Amsterdam UMC Location University of Amsterdam, The Netherlands
| | - Kim R Kampen
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Marc A Vooijs
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
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13
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Abstract
Imaging experiments reveal the complex and dynamic nature of the transcriptional hubs associated with Notch signaling.
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Affiliation(s)
- Virginia L Pimmett
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS UMR 5535ParisFrance
| | - Mounia Lagha
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS UMR 5535ParisFrance
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14
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Shi B, Ge F, Cai L, Yang Y, Guo X, Wu R, Fan Z, Cao B, Wang N, Si Y, Lin X, Dong W, Sun H. Significance of NotchScore and JAG1 in predicting prognosis and immune response of low-grade glioma. Front Immunol 2023; 14:1247288. [PMID: 38022677 PMCID: PMC10679421 DOI: 10.3389/fimmu.2023.1247288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Low-grade glioma (LGG) is a prevalent malignant tumor in the intracranial region. Despite the advancements in treatment methods for this malignancy over the past decade, significant challenges still persist in the form of drug resistance and tumor recurrence. The Notch signaling pathway plays essential roles in many physiological processes as well as in cancer development. However, the significance of the pathway and family genes in LGG are poorly understood. Methods We conducted gene expression profiling analysis using the TCGA dataset to investigate the gene set associated with the Notch signaling pathway. we have proposed a metric called "NotchScore" that quantifies the strength of the Notch signaling pathway and enables us to assess its significance in predicting prognosis and immune response in LGG. We downregulated JAG1 in low-grade gliomas to assess its influence on the proliferation and migration of these tumors. Ultimately, we determined the impact of the transcription factor VDR on the transcription of PDL1 through chip-seq data analysis. Results Our findings indicate that tumors with a higher NotchScore, exhibit poorer prognosis, potentially due to their ability to evade the anti-tumor effects of immune cells by expressing immune checkpoints. Among the genes involved in the Notch signaling pathway, JAG1 has emerged as the most representative in terms of capturing the characteristics of both NotchScore and Notch pathways. The experimental results demonstrate that silencing JAG1 yielded a significant decrease in tumor cell proliferation in LGG cell lines. Our study revealed mechanisms by which tumors evade the immune system through the modulation of PDL1 transcription levels via the PI3K-Akt signaling pathway. Additionally, JAG1 potentially influences PDL1 in LGG by regulating the PI3K-Akt signaling pathway and the expression of the transcription factor VDR. Discussion These findings contribute to our understanding of immune evasion by tumors in LGG. The insights gained from this research may have implications for the development of therapeutic interventions for LGG.
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Affiliation(s)
- Bo Shi
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- School of Life Science, Liaoning Normal University, Dalian, Liaoning, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Fei Ge
- Department of Gastroenterology, Haian Hospital of Traditional Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nantong, Jiangsu, China
| | - Liangliang Cai
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Yi Yang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Xiaohui Guo
- School of Life Science, Liaoning Normal University, Dalian, Liaoning, China
| | - Rui Wu
- School of Life Science, Liaoning Normal University, Dalian, Liaoning, China
| | - Zhehao Fan
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Binjie Cao
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Ning Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Yue Si
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Xinyue Lin
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian, Liaoning, China
| | - Haibo Sun
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, Jiangsu, China
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15
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Wang CW, Clémot M, Hashimoto T, Diaz JA, Goins LM, Goldstein AS, Nagaraj R, Banerjee U. A conserved mechanism for JNK-mediated loss of Notch function in advanced prostate cancer. Sci Signal 2023; 16:eabo5213. [PMID: 37934809 PMCID: PMC10802904 DOI: 10.1126/scisignal.abo5213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 10/19/2023] [Indexed: 11/09/2023]
Abstract
Dysregulated Notch signaling is a common feature of cancer; however, its effects on tumor initiation and progression are highly variable, with Notch having either oncogenic or tumor-suppressive functions in various cancers. To better understand the mechanisms that regulate Notch function in cancer, we studied Notch signaling in a Drosophila tumor model, prostate cancer-derived cell lines, and tissue samples from patients with advanced prostate cancer. We demonstrated that increased activity of the Src-JNK pathway in tumors inactivated Notch signaling because of JNK pathway-mediated inhibition of the expression of the gene encoding the Notch S2 cleavage protease, Kuzbanian, which is critical for Notch activity. Consequently, inactive Notch accumulated in cells, where it was unable to transcribe genes encoding its target proteins, many of which have tumor-suppressive activities. These findings suggest that Src-JNK activity in tumors predicts Notch activity status and that suppressing Src-JNK signaling could restore Notch function in tumors, offering opportunities for diagnosis and targeted therapies for a subset of patients with advanced prostate cancer.
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Affiliation(s)
- Cheng-Wei Wang
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Marie Clémot
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Takao Hashimoto
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Johnny A. Diaz
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Lauren M. Goins
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Andrew S. Goldstein
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
- Department of Urology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, USA
- Molecular Biology Institute; University of California, Los Angeles, Los Angeles, CA, USA
| | - Raghavendra Nagaraj
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
| | - Utpal Banerjee
- Department of Molecular, Cell and Developmental Biology; University of California, Los Angeles, Los Angeles, CA, USA
- Department of Biological Chemistry; University of California, Los Angeles, Los Angeles, CA, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, USA
- Molecular Biology Institute; University of California, Los Angeles, Los Angeles, CA, USA
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16
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Tran LN, Loew SK, Franco SJ. Notch Signaling Plays a Dual Role in Regulating the Neuron-to-Oligodendrocyte Switch in the Developing Dorsal Forebrain. J Neurosci 2023; 43:6854-6871. [PMID: 37640551 PMCID: PMC10573779 DOI: 10.1523/jneurosci.0144-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 07/26/2023] [Accepted: 08/17/2023] [Indexed: 08/31/2023] Open
Abstract
Neural progenitor cells in the developing dorsal forebrain generate excitatory neurons followed by oligodendrocytes (OLs) and astrocytes. However, the specific mechanisms that regulate the timing of this neuron-glia switch are not fully understood. In this study, we show that the proper balance of Notch signaling in dorsal forebrain progenitors is required to generate oligodendrocytes during late stages of embryonic development. Using ex vivo and in utero approaches in mouse embryos of both sexes, we found that Notch inhibition reduced the number of oligodendrocyte lineage cells in the dorsal pallium. However, Notch overactivation also prevented oligodendrogenesis and maintained a progenitor state. These results point toward a dual role for Notch signaling in both promoting and inhibiting oligodendrogenesis, which must be fine-tuned to generate oligodendrocyte lineage cells at the right time and in the right numbers. We further identified the canonical Notch downstream factors HES1 and HES5 as negative regulators in this process. CRISPR (clustered regularly interspaced short palindromic repeat)/Cas9-mediated knockdown of Hes1 and Hes5 caused increased expression of the pro-oligodendrocyte factor ASCL1 and led to precocious oligodendrogenesis. Conversely, combining Notch overactivation with ASCL1 overexpression robustly promoted oligodendrogenesis, indicating a separate mechanism of Notch that operates synergistically with ASCL1 to specify an oligodendrocyte fate. We propose a model in which Notch signaling works together with ASCL1 to specify progenitors toward the oligodendrocyte lineage but also maintains a progenitor state through Hes-dependent repression of Ascl1 so that oligodendrocytes are not made too early, thus contributing to the precise timing of the neuron-glia switch.SIGNIFICANCE STATEMENT Neural progenitors make oligodendrocytes after neurogenesis starts to wind down, but the mechanisms that control the timing of this switch are poorly understood. In this study, we identify Notch signaling as a critical pathway that regulates the balance between progenitor maintenance and oligodendrogenesis. Notch signaling is required for the oligodendrocyte fate, but elevated Notch signaling prevents oligodendrogenesis and maintains a progenitor state. We provide evidence that these opposing functions are controlled by different mechanisms. Before the switch, Notch signaling through Hes factors represses oligodendrogenesis. Later, Notch signaling through an unknown mechanism promotes oligodendrogenesis synergistically with the transcription factor ASCL1. Our study underscores the complexity of Notch and reveals its importance in regulating the timing and numbers of oligodendrocyte production.
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Affiliation(s)
- Luuli N Tran
- Department of Pediatrics, Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
| | - Sarah K Loew
- Department of Pediatrics, Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
- Gates Summer Internship Program, Gates Institute, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
| | - Santos J Franco
- Department of Pediatrics, Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
- Gates Summer Internship Program, Gates Institute, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
- Program in Pediatric Stem Cell Biology, Children's Hospital Colorado, Aurora, Colorado 80045
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17
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Cicero S, Sánchez M, Arrieta S. Predicting Critical Loads in Fused Deposition Modeling Graphene-Reinforced PLA Plates Containing Notches Using the Point Method. Polymers (Basel) 2023; 15:3797. [PMID: 37765651 PMCID: PMC10535195 DOI: 10.3390/polym15183797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
The use of 3D-printed composites in structural applications beyond current prototyping applications requires the definition of safe and robust methodologies for the determination of critical loads. Taking into account that notches (corners, holes, grooves, etc.) are unavoidable in structural components, the presence of these types of stress risers affects the corresponding load-carrying capacity. This work applies the point method (PM) to the estimation of the critical (fracture) loads of graphene-reinforced polylactic acid (PLA-Gr) plates obtained via fused deposition modeling (FDM) with a fixed raster orientation at 45/-45. Additionally, the plates contain three different notch types (U-notches, V-notches, and circular holes) and comprise various thicknesses (from 5 mm up to 20 mm) and ratios of notch length to plate width (a/W= 0.25 and a/W = 0.50). The comparison between the obtained experimental critical loads and the corresponding estimations derived from the application of the PM reveals that this approach generates reasonable accuracy in this particular material that is comparable to the accuracy obtained in other structural materials obtained via traditional manufacturing processes.
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Affiliation(s)
- Sergio Cicero
- LADICIM, Departamento de Ciencia e Ingeniería del Terreno y de los Materiales, Universidad de Cantabria, Avenida de los Castros, 44, 39005 Santander, Spain
| | - Marcos Sánchez
- LADICIM, Departamento de Ciencia e Ingeniería del Terreno y de los Materiales, Universidad de Cantabria, Avenida de los Castros, 44, 39005 Santander, Spain
| | - Sergio Arrieta
- LADICIM, Departamento de Ciencia e Ingeniería del Terreno y de los Materiales, Universidad de Cantabria, Avenida de los Castros, 44, 39005 Santander, Spain
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18
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Ortner M, Guschtschin-Schmidt N, Stelzer W, Muhle-Goll C, Langosch D. Permissive Conformations of a Transmembrane Helix Allow Intramembrane Proteolysis by γ-Secretase. J Mol Biol 2023; 435:168218. [PMID: 37536392 DOI: 10.1016/j.jmb.2023.168218] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/26/2023] [Accepted: 07/26/2023] [Indexed: 08/05/2023]
Abstract
The intramembrane protease γ-secretase activates important signaling molecules, such as Notch receptors. It is still unclear, however, how different elements within the primary structure of substrate transmembrane domains (TMDs) contribute to their cleavability. Using a newly developed yeast-based cleavage assay, we identified three crucial regions within the TMDs of the paralogs Notch1 and Notch3 by mutational and gain-of-function approaches. The AAAA or AGAV motifs within the N-terminal half of the TMDs were found to confer strong conformational flexibility to these TMD helices, as determined by mutagenesis coupled to deuterium/hydrogen exchange. Crucial amino acids within the C-terminal half may support substrate docking into the catalytic cleft of presenilin, the enzymatic subunit of γ-secretase. Further, residues close to the C-termini of the TMDs may stabilize a tripartite β-sheet in the substrate/enzyme complex. NMR structures reveal different extents of helix bending as well as an ability to adopt widely differing conformational substates, depending on the sequence of the N-terminal half. The difference in cleavability between Notch1 and Notch3 TMDs is jointly determined by the conformational repertoires of the TMD helices and the sequences of the C-terminal half, as suggested by mutagenesis and building molecular models. In sum, cleavability of a γ-secretase substrate is enabled by different functions of cooperating TMD regions, which deepens our mechanistic understanding of substrate/non-substrate discrimination in intramembrane proteolysis.
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Affiliation(s)
- Martin Ortner
- Chair of Biopolymer Chemistry, Technical University of Munich, Freising, Germany
| | - Nadja Guschtschin-Schmidt
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany; Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Walter Stelzer
- Chair of Biopolymer Chemistry, Technical University of Munich, Freising, Germany
| | - Claudia Muhle-Goll
- Institute for Biological Interfaces 4, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany; Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Dieter Langosch
- Chair of Biopolymer Chemistry, Technical University of Munich, Freising, Germany.
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19
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Cao Y, Liu B, Cai L, Li Y, Huang Y, Zhou Y, Sun X, Yang W, Sun T. G9a promotes immune suppression by targeting the Fbxw7/ Notch pathway in glioma stem cells. CNS Neurosci Ther 2023; 29:2508-2521. [PMID: 36971192 PMCID: PMC10401078 DOI: 10.1111/cns.14191] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/22/2023] [Accepted: 03/09/2023] [Indexed: 08/05/2023] Open
Abstract
AIM Immunotherapy for glioblastoma multiforme (GBM) is limited because of a strongly immunosuppressive tumor microenvironment (TME). Remodeling the immune TME is an effective strategy to eliminate GBM immunotherapy resistance. Glioma stem cells (GSCs) are inherently resistant to chemotherapy and radiotherapy and involved in immune evasion mechanism. This study aimed to investigate the effects of histone methyltransferases 2 (EHMT2 or G9a) on immunosuppressive TME and whether this effect was related to changes on cell stemness. METHODS Tumor-infiltrating immune cells were analyzed by flow cytometry and immunohistochemistry in orthotopic implanted glioma mice model. The gene expressions were measured by RT-qPCR, western blot, immunofluorescence, and flow cytometry. Cell viability was detected by CCK-8, and cell apoptosis and cytotoxicity were detected by flow cytometry. The interaction of G9a and F-box and WD repeat domain containing 7 (Fbxw7) promotor was verified by dual-luciferase reporter assay and chromatin immunoprecipitation. RESULTS Downregulation of G9a retarded tumor growth and extended survival in an immunocompetent glioma mouse model, promoted the filtration of IFN-γ + CD4+ and CD8+ T lymphocytes, and suppressed the filtration of PD-1+ CD4+ and CD8+ T lymphocytes, myeloid-derived suppressor cells (MDSCs) and M2-like macrophages in TME. G9a inhibition decreased PD-L1 and increased MHC-I expressions by inactivating Notch pathway companying stemness decrease in GSCs. Mechanistically, G9a bound to Fbxw7, a Notch suppressor, to inhibit gene transcription through H3K9me2 of Fbxw7 promotor. CONCLUSION G9a promotes stemness characteristics through binding Fbxw7 promotor to inhibit Fbxw7 transcription in GSCs, forming an immunosuppressive TME, which provides novel treatment strategies for targeting GSCs in antitumor immunotherapy.
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Affiliation(s)
- Yufei Cao
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Bin Liu
- Department of Neurosurgery, Qinghai Provincial People's Hospital, Xining, Qinghai, China
| | - Lize Cai
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yanyan Li
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yulun Huang
- Department of Neurosurgery, Dushu Lake Hospital Affiliated of Soochow University, Suzhou, Jiangsu, China
| | - Youxin Zhou
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Xingjian Sun
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu, China
| | - Wei Yang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu, China
| | - Ting Sun
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
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20
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Boueid MJ, El-Hage O, Schumacher M, Degerny C, Tawk M. Zebrafish as an emerging model to study estrogen receptors in neural development. Front Endocrinol (Lausanne) 2023; 14:1240018. [PMID: 37664862 PMCID: PMC10469878 DOI: 10.3389/fendo.2023.1240018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 07/27/2023] [Indexed: 09/05/2023] Open
Abstract
Estrogens induce several regulatory signals in the nervous system that are mainly mediated through estrogen receptors (ERs). ERs are largely expressed in the nervous system, yet the importance of ERs to neural development has only been elucidated over the last decades. Accumulating evidence shows a fundamental role for estrogens in the development of the central and peripheral nervous systems, hence, the contribution of ERs to neural function is now a growing area of research. The conservation of the structure of the ERs and their response to estrogens make the zebrafish an interesting model to dissect the role of estrogens in the nervous system. In this review, we highlight major findings of ER signaling in embryonic zebrafish neural development and compare the similarities and differences to research in rodents. We also discuss how the recent generation of zebrafish ER mutants, coupled with the availability of several transgenic reporter lines, its amenability to pharmacological studies and in vivo live imaging, could help us explore ER function in embryonic neural development.
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Affiliation(s)
| | | | | | | | - Marcel Tawk
- *Correspondence: Cindy Degerny, ; Marcel Tawk,
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21
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Wang L, Wan MC, Liao RY, Xu J, Xu ZG, Xue HC, Mai YX, Wang JW. The maturation and aging trajectory of Marchantia polymorpha at single-cell resolution. Dev Cell 2023; 58:1429-1444.e6. [PMID: 37321217 DOI: 10.1016/j.devcel.2023.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 04/13/2023] [Accepted: 05/19/2023] [Indexed: 06/17/2023]
Abstract
Bryophytes represent a sister to the rest of land plants. Despite their evolutionary importance and relatively simple body plan, a comprehensive understanding of the cell types and transcriptional states that underpin the temporal development of bryophytes has not been achieved. Using time-resolved single-cell RNA sequencing, we define the cellular taxonomy of Marchantia polymorpha across asexual reproduction phases. We identify two maturation and aging trajectories of the main plant body of M. polymorpha at single-cell resolution: the gradual maturation of tissues and organs along the tip-to-base axis of the midvein and the progressive decline of meristem activities in the tip along the chronological axis. Specifically, we observe that the latter aging axis is temporally correlated with the formation of clonal propagules, suggesting an ancient strategy to optimize allocation of resources to producing offspring. Our work thus provides insights into the cellular heterogeneity that underpins the temporal development and aging of bryophytes.
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Affiliation(s)
- Long Wang
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China
| | - Mu-Chun Wan
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Ren-Yu Liao
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Jie Xu
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China
| | - Zhou-Geng Xu
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Hao-Chen Xue
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Yan-Xia Mai
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; Core Facility Center of CEMPS, SIPPE, CAS, Shanghai 200032, China
| | - Jia-Wei Wang
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai 200032, China; School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China.
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Knapp K, Verchio V, Coburn-Flynn O, Li Y, Xiong Z, Morrison JC, Shersher DD, Spitz F, Chen X. Exploring cell competition for the prevention and therapy of esophageal squamous cell carcinoma. Biochem Pharmacol 2023; 214:115639. [PMID: 37290594 PMCID: PMC10528900 DOI: 10.1016/j.bcp.2023.115639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/10/2023]
Abstract
Esophageal squamous cell carcinoma (ESCC) is characterized by the development of cancer in the esophageal squamous epithelium through a step-by-step accumulation of genetic, epigenetic, and histopathological alterations. Recent studies have demonstrated that cancer-associated gene mutations exist in histologically normal or precancerous clones of the human esophageal epithelium. However, only a small proportion of such mutant clones will develop ESCC, and most ESCC patients develop only one cancer. This suggests that most of these mutant clones are kept in a histologically normal state by neighboring cells with higher competitive fitness. When some of the mutant cells evade cell competition, they become "super-competitors" and develop into clinical cancer. It is known that human ESCC is composed of a heterogeneous population of cancer cells that interact with and influence their environment and neighbors. During cancer therapy, these cancer cells not only respond to therapeutic agents but also compete with each other. Therefore, competition between ESCC cells within the same ESCC tumor is a constantly dynamic process. However, it remains challenging to fine-tune the competitive fitness of various clones for therapeutic benefits. In this review, we will explore the role of cell competition in carcinogenesis, cancer prevention, and therapy, using NRF2, NOTCH pathway, and TP53 as examples. We believe that cell competition is a research area with promising targets for clinical translation. Manipulating cell competition may help improve the prevention and therapy of ESCC.
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Affiliation(s)
- Kristen Knapp
- Department of Surgery, Cooper University Hospital, Camden, NJ 08103, USA
| | - Vincent Verchio
- Department of Surgery, Cooper University Hospital, Camden, NJ 08103, USA
| | | | - Yahui Li
- Coriell Institute for Medical Research, Camden, NJ 08103, USA
| | - Zhaohui Xiong
- Coriell Institute for Medical Research, Camden, NJ 08103, USA
| | - Jamin C Morrison
- MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA; Cooper Medical School of Rowan University, Camden, NJ 08103, USA
| | - David D Shersher
- Department of Surgery, Cooper University Hospital, Camden, NJ 08103, USA; MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA; Cooper Medical School of Rowan University, Camden, NJ 08103, USA
| | - Francis Spitz
- Department of Surgery, Cooper University Hospital, Camden, NJ 08103, USA; MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA; Cooper Medical School of Rowan University, Camden, NJ 08103, USA
| | - Xiaoxin Chen
- Department of Surgery, Cooper University Hospital, Camden, NJ 08103, USA; Coriell Institute for Medical Research, Camden, NJ 08103, USA; MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA; Cooper Medical School of Rowan University, Camden, NJ 08103, USA.
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23
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Fais F, Efremov DG. Editorial: The notch signaling pathway in lymphoid malignancies. Front Oncol 2023; 13:1216398. [PMID: 37260980 PMCID: PMC10227586 DOI: 10.3389/fonc.2023.1216398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 06/02/2023] Open
Affiliation(s)
- Franco Fais
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Molecular Pathology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Dimitar G. Efremov
- Molecular Hematology Unit, International Center for Genetic Engineering and Biotechnology, Trieste, Italy
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24
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Tanaka M, Nakamura S, Sakaue T, Yamamoto T, Maekawa M, Nishinaka A, Yasuda H, Yunoki K, Sato Y, Sawa M, Yoshino K, Shimazawa M, Hatano M, Tokuhisa T, Higashiyama S, Hara H. BCL6B (B-Cell CLL/Lymphoma 6 Member B Protein) Contributes to Ocular Vascular Diseases via Notch Signal Silencing. Arterioscler Thromb Vasc Biol 2023; 43:927-942. [PMID: 37078291 DOI: 10.1161/atvbaha.123.318987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
BACKGROUND Endothelial cell activation is tightly controlled by the balance between VEGF (vascular endothelial cell growth factor) and Notch signaling pathway. VEGF destabilizes blood vessels and promotes neovascularization, which are common features of sight-threatening ocular vascular disorders. Here, we show that BCL6B (B-cell CLL/lymphoma 6 member B protein), also known as BAZF, ZBTB28, and ZNF62, plays a pivotal role in the development of retinal edema and neovascularization. METHODS The pathophysiological physiological role of BCL6B was investigated in cellular and animal models mimicking 2 pathological conditions: retinal vein occlusion and choroidal neovascularization. An in vitro experimental system was used in which human retinal microvascular endothelial cells were supplemented with VEGF. Choroidal neovascularization cynomolgus monkey model was generated to investigate the involvement of BCL6B in the pathogenesis. Mice lacking BCL6B or treated with BCL6B-targeting small-interfering ribose nucleic acid were examined for histological and molecular phenotypes. RESULTS In retinal endothelial cells, the BCL6B expression level was increased by VEGF. BCL6B-deficient endothelial cells showed Notch signal activation and attenuated cord formation via blockage of the VEGF-VEGFR2 signaling pathway. Optical coherence tomography images showed that choroidal neovascularization lesions were decreased by BCL6B-targeting small-interfering ribose nucleic acid. Although BCL6B mRNA expression was significantly increased in the retina, BCL6B-targeting small-interfering ribose nucleic acid suppressed ocular edema in the neuroretina. The increase in proangiogenic cytokines and breakdown of the inner blood-retinal barrier were abrogated in BCL6B knockout (KO) mice via Notch transcriptional activation by CBF1 (C promotor-binding factor 1) and its activator, the NICD (notch intracellular domain). Immunostaining showed that Müller cell activation, a source of VEGF, was diminished in BCL6B-KO retinas. CONCLUSIONS These data indicate that BCL6B may be a novel therapeutic target for ocular vascular diseases characterized by ocular neovascularization and edema.
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Affiliation(s)
- Miruto Tanaka
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
| | - Tomohisa Sakaue
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center, Ehime University, Japan (T.S., S.H.)
- Department of Cardiovascular and Thoracic Surgery, Ehime University Graduate School of Medicine, Japan (T.S.)
| | - Takumi Yamamoto
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
| | - Masashi Maekawa
- Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Minato‑ku, Tokyo, Japan (M.M.)
| | - Anri Nishinaka
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
| | - Hiroto Yasuda
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
| | - Kaori Yunoki
- Carna Biosciences, Inc., Kobe, Japan (K. Yunoki, Y.S., M.S., K. Yoshino)
| | - Yuji Sato
- Carna Biosciences, Inc., Kobe, Japan (K. Yunoki, Y.S., M.S., K. Yoshino)
| | - Masaaki Sawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
- Carna Biosciences, Inc., Kobe, Japan (K. Yunoki, Y.S., M.S., K. Yoshino)
| | - Kohichiro Yoshino
- Carna Biosciences, Inc., Kobe, Japan (K. Yunoki, Y.S., M.S., K. Yoshino)
| | - Masamitsu Shimazawa
- Laboratory of Collaborative research for Innovative Drug Discovery, Gifu Pharmaceutical University, Japan (M.S.)
| | | | - Takeshi Tokuhisa
- Department of Developmental Genetics (T.T.)
- Graduate School of Medicine, Chiba University, Japan (T.T.)
| | - Shigeki Higashiyama
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center, Ehime University, Japan (T.S., S.H.)
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Japan (S.H.)
- Department of Oncogenesis and Growth Regulation, Osaka International Cancer Institute, Japan (S.H.)
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Japan (M.T., S.N., T.Y., A.N., H.Y., M.S., H.H.)
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Lee SH, So J, Shin D. Hepatocyte-to-cholangiocyte conversion occurs through transdifferentiation independently of proliferation in zebrafish. Hepatology 2023; 77:1198-1210. [PMID: 36626626 PMCID: PMC10023500 DOI: 10.1097/hep.0000000000000016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 10/10/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND AIMS Injury to biliary epithelial cells (BECs) lining the hepatic bile ducts leads to cholestatic liver diseases. Upon severe biliary damage, hepatocytes can convert to BECs, thereby contributing to liver recovery. Given a potential of augmenting this hepatocyte-to-BEC conversion as a therapeutic option for cholestatic liver diseases, it will be important to thoroughly understand the cellular and molecular mechanisms of the conversion process. APPROACH AND RESULTS Towards this aim, we have established a zebrafish model for hepatocyte-to-BEC conversion by employing Tg(fabp10a:CFP-NTR) zebrafish with a temporal inhibition of Notch signaling during regeneration. Cre/loxP-mediated permanent and H2B-mCherry-mediated short-term lineage tracing revealed that in the model, all BECs originate from hepatocytes. During the conversion, BEC markers are sequentially induced in the order of Sox9b, Yap/Taz, Notch activity/ epcam , and Alcama/ krt18 ; the expression of the hepatocyte marker Bhmt disappears between the Sox9b and Yap/Taz induction. Importantly, live time-lapse imaging unambiguously revealed transdifferentiation of hepatocytes into BECs: hepatocytes convert to BECs without transitioning through a proliferative intermediate state. In addition, using compounds and transgenic and mutant lines that modulate Notch and Yap signaling, we found that both Notch and Yap signaling are required for the conversion even in Notch- and Yap-overactivating settings. CONCLUSIONS Hepatocyte-to-BEC conversion occurs through transdifferentiation independently of proliferation, and Notch and Yap signaling control the process in parallel with a mutually positive interaction. The new zebrafish model will further contribute to a thorough understanding of the mechanisms of the conversion process.
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Affiliation(s)
- Seung-Hoon Lee
- Department of Developmental Biology, McGowan Institute for Regenerative Medicine, Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Juhoon So
- Department of Developmental Biology, McGowan Institute for Regenerative Medicine, Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Donghun Shin
- Department of Developmental Biology, McGowan Institute for Regenerative Medicine, Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15260, USA
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Jia W, Zhang Y, Wang X, Luo L, Sun H, Jiang Y, Wang J, Mao Q, Guo Y, Kong L, Mo R, Li C. KRT5 mutation regulate melanin metabolism through notch signalling pathway between keratinocytes and melanocytes. Exp Dermatol 2023. [PMID: 36809573 DOI: 10.1111/exd.14761] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/23/2023]
Abstract
Dowling-Degos disease (DDD) is an autosomal dominant hereditary skin disease characterized by acquired reticular hyperpigmentation in flexural sites, and one of its causative genes is KRT5 gene. But the effect of KRT5, expressed only in keratinocytes, on melanocytes is unclear. Other pathogenic genes of DDD include POFUT1, POGLUT1 and PSENEN genes, which is involved in posttranslational modification of Notch receptor. In this study, we aim to determine the ablation of keratinocyte KRT5 affect melanogenesis in melanocyte through Notch signalling pathway. Here we found that KRT5 downregulation decreased the expression of the Notch ligand in keratinocytes and Notch1 intracellular domain in melanocytes, by establishing two cell models of ablation of KRT5 in keratinocytes based on CRISPR/Cas9 site-directed mutation and lentivirus-mediated shRNA. Treatment of melanocytes with Notch inhibitors had same effects with ablation of KRT5 on increase of TYR and decrease of Fascin1. Activation of Notch signalling reverses the effect of ablation of KRT5 on melanogenesis. Immunohistochemistry of DDD lesions with KRT5 gene mutation confirmed changes in the expression of relevant molecules in Notch signalling. Our research elucidates molecular mechanism of KRT5-Notch signalling pathway in the regulation of melanocytes by keratinocytes, and preliminary reveal the mechanism of DDD pigment abnormality caused by KRT5 mutation. These findings identify potential therapeutic targets of the Notch signalling pathway for the treatment of skin pigment disorders.
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Affiliation(s)
- Weixue Jia
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Yuanyuan Zhang
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Xue Wang
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Lingling Luo
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Heng Sun
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Yiqun Jiang
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Jianbo Wang
- Department of Dermatology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Qiuxia Mao
- Department of Dermatology, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Youming Guo
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Lingzhuo Kong
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Ran Mo
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
| | - Chengrang Li
- Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
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Drummond BE, Ercanbrack WS, Wingert RA. Modeling Podocyte Ontogeny and Podocytopathies with the Zebrafish. J Dev Biol 2023; 11:jdb11010009. [PMID: 36810461 PMCID: PMC9944608 DOI: 10.3390/jdb11010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/11/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Podocytes are exquisitely fashioned kidney cells that serve an essential role in the process of blood filtration. Congenital malformation or damage to podocytes has dire consequences and initiates a cascade of pathological changes leading to renal disease states known as podocytopathies. In addition, animal models have been integral to discovering the molecular pathways that direct the development of podocytes. In this review, we explore how researchers have used the zebrafish to illuminate new insights about the processes of podocyte ontogeny, model podocytopathies, and create opportunities to discover future therapies.
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28
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Souza PG, Adolpho LF, Lopes HB, Weffort D, Souza ATP, Oliveira FS, Rosa AL, Beloti MM. Effects of Modulation of the Hedgehog and Notch Signaling Pathways on Osteoblast Differentiation Induced by Titanium with Nanotopography. J Funct Biomater 2023; 14. [PMID: 36826878 DOI: 10.3390/jfb14020079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/14/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The events of bone formation and osteoblast/titanium (Ti) interactions may be affected by Hedgehog and Notch signalling pathways. Herein, we investigated the effects of modulation of these signalling pathways on osteoblast differentiation caused by the nanostructured Ti (Ti-Nano) generated by H2SO4/H2O2. METHODS Osteoblasts from newborn rat calvariae were cultured on Ti-Control and Ti-Nano in the presence of the Hedgehog agonist purmorphamine or antagonist cyclopamine and of the Notch antagonist N-(3,5-Difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester (DAPT) or agonist bexarotene. Osteoblast differentiation was evaluated by alkaline phosphatase activity and mineralization, and the expression of Hedgehog and Notch receptors was also evaluated. RESULTS In general, purmorphamine and DAPT increased while cyclopamine and bexarotene decreased osteoblast differentiation and regulated the receptor expression on both Ti surfaces, with more prominent effects on Ti-Nano. The purmorphamine and DAPT combination exhibited synergistic effects on osteoblast differentiation that was more intense on Ti-Nano. CONCLUSION Our results indicated that the Hedgehog and Notch signalling pathways drive osteoblast/Ti interactions more intensely on nanotopography. We also demonstrated that combining Hedgehog activation with Notch inhibition exhibits synergistic effects on osteoblast differentiation, especially on Ti-Nano. The uncovering of these cellular mechanisms contributes to create strategies to control the process of osseointegration based on the development of nanostructured surfaces.
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Kalashyan M, Raghunathan K, Oller H, Theres MB, Jimenez L, Roland JT, Kolobova E, Hagen SJ, Goldsmith JD, Shub MD, Goldenring JR, Kaji I, Thiagarajah JR. Therapy Development for Microvillus Inclusion Disease using Patient-derived Enteroids. bioRxiv 2023:2023.01.28.526036. [PMID: 36747680 PMCID: PMC9900906 DOI: 10.1101/2023.01.28.526036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Microvillus Inclusion Disease (MVID), caused by loss-of-function mutations in the motor protein Myosin Vb (MYO5B), is a severe infantile disease characterized by diarrhea, malabsorption, and acid-base instability, requiring intensive parenteral support for nutritional and fluid management. Human patient-derived enteroids represent a model for investigation of monogenic epithelial disorders but are a rare resource from MVID patients. We developed human enteroids with different loss-of function MYO5B variants and showed that they recapitulated the structural changes found in native MVID enterocytes. Multiplex Immunofluorescence imaging of patient duodenal tissues revealed patient-specific changes in localization of brush border transporters. Functional analysis of electrolyte transport revealed profound loss of Na + /H + exchange (NHE) activity in MVID patient enteroids with near-normal chloride secretion. The chloride channel-blocking anti-diarrheal drug, Crofelemer, dose-dependently inhibited agonist-mediated fluid secretion. MVID enteroids exhibited altered differentiation and maturation versus healthy enteroids. Inhibition of Notch signaling with the γ-secretase inhibitor, DAPT, recovered apical brush border structure and functional Na + /H + exchange activity in MVID enteroids. Transcriptomic analysis revealed potential pathways involved in the rescue of MVID cells including serum- and glucocorticoid-induced protein kinase 2 (SGK2), and NHE regulatory factor 3 (NHERF3). These results demonstrate the utility of patient-derived enteroids for developing therapeutic approaches to MVID. Conflict-of-interest statement The authors have declared that no conflict of interest exists.
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Affiliation(s)
- Meri Kalashyan
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
| | - Krishnan Raghunathan
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
| | - Haley Oller
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
| | - Marie-Bayer Theres
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
| | - Lissette Jimenez
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
- Congenital Enteropathy Program, Boston Children’s Hospital, Boston, MA
- PediCoDE Consortium
| | - Joseph T. Roland
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Elena Kolobova
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Susan J Hagen
- Department of Surgery, Division of Surgical Sciences, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Jeffrey D. Goldsmith
- Department of Pathology, Boston Children’s Hospital; Harvard Medical School, Boston, MA
- PediCoDE Consortium
| | - Mitchell D. Shub
- Department of Child Health University of Arizona College of Medicine-Phoenix and Division of Gastroenterology, Phoenix Children’s
| | - James R. Goldenring
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Nashville VA Medical Center, Nashville, TN
- PediCoDE Consortium
| | - Izumi Kaji
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee
- PediCoDE Consortium
| | - Jay R. Thiagarajah
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital; Harvard Medical School, Boston, MA
- Congenital Enteropathy Program, Boston Children’s Hospital, Boston, MA
- Harvard Digestive Disease Center, Boston MA
- PediCoDE Consortium
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White MJ, Jacobs KA, Singh T, Kutys ML. Notch1 cortical signaling regulates epithelial architecture and cell-cell adhesion. bioRxiv 2023:2023.01.23.524428. [PMID: 36747830 PMCID: PMC9900753 DOI: 10.1101/2023.01.23.524428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Notch receptors control tissue morphogenic processes that involve coordinated changes in cell architecture and gene expression, but how a single receptor can produce these diverse biological outputs is unclear. Here we employ a 3D organotypic model of a ductal epithelium to reveal tissue morphogenic defects result from loss of Notch1, but not Notch1 transcriptional signaling. Instead, defects in duct morphogenesis are driven by dysregulated epithelial cell architecture and mitogenic signaling which result from loss of a transcription-independent Notch1 cortical signaling mechanism that ultimately functions to stabilize adherens junctions and cortical actin. We identify that Notch1 localization and cortical signaling are tied to apical-basal cell restructuring and discover a Notch1-FAM83H interaction underlies stabilization of adherens junctions and cortical actin. Together, these results offer new insights into Notch1 signaling and regulation, and advance a paradigm in which transcriptional and cell adhesive programs might be coordinated by a single receptor.
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Affiliation(s)
- Matthew J. White
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco CA, 94143, USA
| | - Kyle A. Jacobs
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco CA, 94143, USA
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco CA, 94143, USA
| | - Tania Singh
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco CA, 94143, USA
- Joint Graduate Program in Bioengineering, University of California San Francisco, University of California Berkeley, San Francisco CA, 94143, USA
| | - Matthew L. Kutys
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco CA, 94143, USA
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco CA, 94143, USA
- Joint Graduate Program in Bioengineering, University of California San Francisco, University of California Berkeley, San Francisco CA, 94143, USA
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco CA, 94143, USA
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31
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Ventrella R, Kim SK, Sheridan J, Grata A, Bresteau E, Hassan O, Suva EE, Walentek P, Mitchell B. Bidirectional multiciliated cell extrusion is controlled by Notch driven basal extrusion and Piezo 1 driven apical extrusion. bioRxiv 2023:2023.01.12.523838. [PMID: 36711534 PMCID: PMC9882179 DOI: 10.1101/2023.01.12.523838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Xenopus embryos are covered with a complex epithelium containing numerous multiciliated cells (MCCs). During late stage development there is a dramatic remodeling of the epithelium that involves the complete loss of MCCs. Cell extrusion is a well-characterized process for driving cell loss while maintaining epithelial barrier function. Normal cell extrusion is typically unidirectional whereas bidirectional extrusion is often associated with disease (e.g. cancer). We describe two distinct mechanisms for MCC extrusion, a basal extrusion driven by Notch signaling and an apical extrusion driven by Piezo1. Early in the process there is a strong bias towards basal extrusion, but as development continues there is a shift towards apical extrusion. Importantly, receptivity to the Notch signal is age-dependent and governed by the maintenance of the MCC transcriptional program such that extension of this program is protective against cell loss. In contrast, later apical extrusion is regulated by Piezo 1 such that premature activation of Piezo 1 leads to early extrusion while blocking Piezo 1 leads to MCC maintenance. Distinct mechansms for MCC loss underlie the importance of their removal during epithelial remodeling. Summay Statement Cell extrusion typically occurs unidirectionally. We have identified a single population of multiciliated cells that extrudes bidirectionally: Notch-driven basal extrusion and Piezo 1-mediated apical extrusion.
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Affiliation(s)
- Rosa Ventrella
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
- Current position; Assistant professor, Precision Medicine Program, Midwestern University
| | - Sun K. Kim
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Jennifer Sheridan
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Aline Grata
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Enzo Bresteau
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Osama Hassan
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Eve E. Suva
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
| | - Peter Walentek
- University of Freiburg, Renal Division, Internal Medicine IV, Medical Center and CIBSS Centre for Integrative Biological Signalling Studies
| | - Brian Mitchell
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology
- Northwestern University, Lurie Cancer Center
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Wang JN, Cao XJ. Targeting ADAM10 in Renal Diseases. Curr Mol Med 2023; 23:1037-1045. [PMID: 36278450 DOI: 10.2174/1566524023666221020142504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 09/16/2022] [Accepted: 09/21/2022] [Indexed: 11/22/2022]
Abstract
ADAM10 is part of the ADAM superfamily containing cell surface proteins with special structures and potential adhesion and protease domains. This paper provides a review of the specific effects of ADAM10 in kidney development as well as its relations with renal diseases. ADAM10 plays an important role in developing tissues and organs and the pathogenesis of multiple diseases. The catalytic mechanism of ADAM10 on kidney-related molecules, including Notch, epidermal growth factor receptors, tumor necrosis factor-α, CXCL16, E-cadherin, cell adhesion molecule 1, meprin and klotho. ADAM10 is also closely associated with the progress of glomerular diseases, acute kidney injury and renal fibrosis. It probably is a good therapeutic target for renal diseases.
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Affiliation(s)
- Jie-Na Wang
- Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325088, China
| | - Xiao-Jing Cao
- Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325088, China
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Xu J, Hu Z, Cao H, Zhang H, Luo P, Zhang J, Wang X, Cheng Q, Li J. Multi-omics pan-cancer study of cuproptosis core gene FDX1 and its role in kidney renal clear cell carcinoma. Front Immunol 2022; 13:981764. [PMID: 36605188 PMCID: PMC9810262 DOI: 10.3389/fimmu.2022.981764] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 10/28/2022] [Indexed: 01/07/2023] Open
Abstract
Background The mechanism of copper-induced cellular death was newly discovered and termed cuproptosis. Inducing cuproptosis in cancer cells is well anticipated for its curative potential in treating tumor diseases. However, ferredoxin 1 (FDX1), the core regulatory gene in cuproptosis, is rarely studied, and the regulation of FDX1 in tumor biology remains obscure. A comprehensive pan-cancer analysis of FDX1 is needed. Methods Thirty-three types of tumors were included with paired normal tissues in The Cancer Genome Atlas (TCGA) and the Genotype-Tissue Expression (GTEx) datasets. The interaction between transcription, protein, phosphorylation, and promoter methylation levels was analyzed. Survival, immune infiltration, single-cell FDX1 expression, FDX1-related tumor mutational burden (TMB), microsatellite instability (MSI), stemness, tumor immune dysfunction and exclusion (TIDE), and immunotherapy-related analyses were performed. FDX1 protein expression was assessed by kidney renal clear cell carcinoma (KIRC) tissue microarray immunohistochemistry. The function of FDX1 in KIRC was further explored by experiments in 786-O cell lines in vitro. Results FDX1 is highly expressed in 15 tumor types and lowly expressed in 11 tumor types. The corresponding changes in protein expression, phosphorylation, and promoter methylation level of FDX1 have been described in several tumors. Survival analysis showed that FDX1 was related to favorable or poor overall survival in eight tumors and progression-free survival in nine tumors. Immune infiltration and single-cell analysis indicated the indispensable role of FDX1 expression in macrophages and monocytes. Multiple established immunotherapy cohorts suggested that FDX1 may be a potential predictor of treatment effects for tumor patients. Tissue microarray analysis showed decreased FDX1 expression in KIRC patients' tumor tissues. Knockdown of FDX1 resulted in the downregulation of cuproptosis in kidney renal clear tumor cells. Mechanistically, the FDX1-associated gene expression signature in KIRC is related to the enrichment of genes involved in the tricarboxylic acid (TCA) cycle, NOTCH pathway, etc. Several NOTCH pathway genes were differentially expressed in the high- and low-FDX1 groups in KIRC. Conclusion Our analysis showed that the central regulatory gene of cuproptosis, FDX1, has differential expression and modification levels in various tumors, which is associated with cellular function, immune modulation, and disease prognosis. Thus, FDX1-dependent cuproptosis may serve as a brand-new target in future therapeutic approaches against tumors.
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Affiliation(s)
- Jiahao Xu
- Department of Gastroenterology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhengang Hu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
| | - Hui Cao
- Brain Hospital of Hunan Province, The Second People's Hospital of Hunan Province, Changsha, China
| | - Hao Zhang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
| | - Peng Luo
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jian Zhang
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoyan Wang
- Department of Gastroenterology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Quan Cheng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Hunan, China,*Correspondence: Quan Cheng, ; Jingbo Li,
| | - Jingbo Li
- Department of Gastroenterology, The Third Xiangya Hospital, Central South University, Changsha, China,*Correspondence: Quan Cheng, ; Jingbo Li,
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Toribio J, Lorenzo M, Aguado L. Innovative Design of Residual Stress and Strain Distributions for Analyzing the Hydrogen Embrittlement Phenomenon in Metallic Materials. Materials (Basel) 2022; 15:9063. [PMID: 36556868 PMCID: PMC9784685 DOI: 10.3390/ma15249063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Round-notched samples are commonly used for testing the susceptibility to hydrogen embrittlement (HE) of metallic materials. Hydrogen diffusion is influenced by the stress and strain states generated during testing. This state causes hydrogen-assisted micro-damage leading to failure that is due to HE. In this study, it is assumed that hydrogen diffusion can be controlled by modifying such residual stress and strain fields. Thus, the selection of the notch geometry to be used in the experiments becomes a key task. In this paper, different HE behaviors are analyzed in terms of the stress and strain fields obtained under diverse loading conditions (un-preloaded and preloaded causing residual stress and strains) in different notch geometries (shallow notches and deep notches). To achieve this goal, two uncoupled finite element (FE) simulations were carried out: (i) a simulation by FE of the loading sequences applied in the notched geometries for revealing the stress and strain states and (ii) a simulation of hydrogen diffusion assisted by stress and strain, for estimating the hydrogen distributions. According to results, hydrogen accumulation in shallow notches is heavily localized close to the wire surface, whereas for deep notches, hydrogen is more uniformly distributed. The residual stress and plastic strains generated by the applied preload localize maximum hydrogen concentration at deeper points than un-preloaded cases. As results, four different scenarios are established for estimating "a la carte" the HE susceptibility of pearlitic steels just combining two notch depths and the residual stress and strain caused by a preload.
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Heinze D, Park S, McCracken A, Haratianfar M, Lindstrom J, Villacorta-Martin C, Mithal A, Wang F, Yang MW, Murphy G, Mostoslavsky G. Notch activation during early mesoderm induction modulates emergence of the T/NK cell lineage from human iPSCs. Stem Cell Reports 2022; 17:2610-2628. [PMID: 36332629 PMCID: PMC9768581 DOI: 10.1016/j.stemcr.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 10/06/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
A robust method of producing mature T cells from iPSCs is needed to realize their therapeutic potential. NOTCH1 is known to be required for the production of hematopoietic progenitor cells with T cell potential in vivo. Here we identify a critical window during mesodermal differentiation when Notch activation robustly improves access to definitive hematopoietic progenitors with T/NK cell lineage potential. Low-density progenitors on either OP9-hDLL4 feeder cells or hDLL4-coated plates favored T cell maturation into TCRab+CD3+CD8+ cells that express expected T cell markers, upregulate activation markers, and proliferate in response to T cell stimulus. Single-cell RNAseq shows Notch activation yields a 6-fold increase in multi-potent hematopoietic progenitors that follow a developmental trajectory toward T cells with clear similarity to post-natal human thymocytes. We conclude that early mesodermal Notch activation during hematopoietic differentiation is a missing stimulus with broad implications for producing hematopoietic progenitors with definitive characteristics.
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Affiliation(s)
- Dar Heinze
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA; Department of Surgery, Boston University Medical Center, Boston, MA, USA
| | - Seonmi Park
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Andrew McCracken
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Mona Haratianfar
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Jonathan Lindstrom
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Carlos Villacorta-Martin
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Aditya Mithal
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Feiya Wang
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Meng Wei Yang
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - George Murphy
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA
| | - Gustavo Mostoslavsky
- Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, MA, USA; Department of Medicine, Section of Gastroenterology at Boston University and Boston Medical Center, Boston, MA, USA.
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Nasser S, Abdallah DM, Ahmed KA, Abdel-Mottaleb Y, El-Abhar HS. The novel anti-colitic effect of β-adrenergic receptors via modulation of PS1/BACE-1/Aβ axis and NOTCH signaling in an ulcerative colitis model. Front Pharmacol 2022; 13:1008085. [PMID: 36386153 PMCID: PMC9641009 DOI: 10.3389/fphar.2022.1008085] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 10/12/2022] [Indexed: 11/30/2023] Open
Abstract
Although dysautonomia was documented in inflammatory bowel disease, with activation of the stress-related sympathetic system, the role of agonists/antagonists of the adrenergic receptors is not conclusive. Moreover, ulcerative colitis was recently linked to dementia, but the potential role of the presenilin 1(PS1)/BACE-1/beta-amyloid (Aβ) axis has not been evaluated. Hence, we investigated the impact of mirabegron (β3-agonist) and/or carvedilol (β1/β2 antagonist) on iodoacetamide-induced ulcerative colitis with emphasis on the novel pathomechanism of the PS1/BACE-1/Aβ axis in ulcerative colitis, and its relation to the inflammatory cascade, fibrotic processes, and the gut barrier dysfunction. Ulcerated rats were either left untreated or treated for 8 days with mirabegron and/or carvedilol. Besides minimizing colon edema and weight loss, and improving colon structure, mirabegron and/or carvedilol abated colonic PS1/BACE-1/Aβ axis and the NOTCH1/NICD/HES1 hub besides the inflammatory cascade GSK3-β/NF-κΒ/TNF-α, and the oxidative stress marker malondialdehyde. The anti-fibrotic effect was verified by boosting SMAD-7 and inhibiting TGF-β1, α-SMA immunoexpression, and MTC staining. Moreover, the drugs improved the gut barrier function, attested by the increased goblet cells and expression of E-cadherin, and the inhibited expression of p (Y654)-β-catenin to preserve the E-cadherin/β-catenin adherens junction (AJ). These signaling pathways may be orchestrated by the replenished PPAR-γ, a transcription factor known for its anti-colitic effect. Conclusion: Besides maintaining the gut barrier, mirabegron and/or carvedilol mediated their anti-colitic effect by their anti-oxidant, anti-inflammatory, and anti-fibrotic capacities. The therapeutic effect of these drugs depends partly on suppressing the harmful signaling pathways PS1/BACE-1/Aβ, NOTCH1/NICD/HES1, GSK3-β/NF-κΒ/TNF-α, and TGF-1β/α-SMA while enhancing PPAR-γ, SMAD-7, mucus, and AJ.
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Affiliation(s)
- Salma Nasser
- Pharmacology, Toxicology and Biochemistry Department, Faculty of Pharmacy, Future University in Egypt (FUE), New Cairo, Egypt
| | - Dalaal M. Abdallah
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Kawkab A. Ahmed
- Pathology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Yousra Abdel-Mottaleb
- Pharmacology, Toxicology and Biochemistry Department, Faculty of Pharmacy, Future University in Egypt (FUE), New Cairo, Egypt
| | - Hanan S. El-Abhar
- Pharmacology, Toxicology and Biochemistry Department, Faculty of Pharmacy, Future University in Egypt (FUE), New Cairo, Egypt
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Muacevic A, Adler JR. A Malignant Glomus Tumor of the Liver Harboring MIR143- NOTCH2 Rearrangement: From Diagnosis to Management. Cureus 2022; 14:e30718. [PMID: 36439569 PMCID: PMC9696860 DOI: 10.7759/cureus.30718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/22/2022] [Indexed: 01/25/2023] Open
Abstract
A primary malignant glomus tumor of the liver is extremely rare and diagnostically challenging. We present an exceptional case of such with a diagnosis confirmed by MIR143-NOTCH2 rearrangement. The case was successfully managed with neoadjuvant chemotherapy followed by surgery. This report highlights the utilization of molecular analysis to aid in the diagnosis of rare soft tissue malignancies and supports a multimodality approach to the treatment of large, high-grade malignant glomus tumors.
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Xu Y, Jiang S, Hu Y, Zhang Q, Su W. TGF-β3 induces lactate production in Sertoli cell through inhibiting Notch pathway. Andrology 2022; 10:1644-1659. [PMID: 36057850 DOI: 10.1111/andr.13288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUNDS In the testis, spermatocytes and spermatids rely on lactate produced by Sertoli cells (SCs) as energy source. TGF-β3 is one of the generally accepted paracrine regulatory factors of SC-created blood-testis barrier (BTB), yet its role in SC glycolysis and lactate production still remains unclear. OBJECTIVES To investigate the effect of TGF-β3 on glycolysis and lactate production in SCs and determine the role of Lgl2 and Notch signaling activity during this process. MATERIALS AND METHODS Primary cultured rat Sertoli cells and TM4 cells were treated with different concentrations of TGF-β3. In some experiments, cells were transfected with siRNA specifically targeting Lgl2 and then treated with TGF-β3 or DAPT. Lactate concentration, glucose and glutamine consumption in the culture medium, activity of PFK, LDH, and Gls, ATP level, oxygen consumption, extracellular acidification and mitochondrial respiration complex activity were detected using commercial kits. The protein level of Lgl2, LDH, MCT4, and activity of Akt, ERK, p38 MAPK, and Notch pathway were detected by Western blot. The stage-specific expression of Jagged1 was examined by immunohistochemistry and qPCR after LCM. Spermatogenesis in rat testis injected with recombinant Jagged1 (re-Jagged1) was observed by HE staining and lactate concentration in testis lysate was measured at different day point after re-Jagged1 treatment. RESULTS Significant enhancement of lactate concentration was detected in culture medium of both primary SCs and TM4 cells treated with TGF-β3 at 3 or 5 ng/ml. Besides, other parameters of glycolysis, i.e. glucose and Gln consumption, enzyme activity of PFK, LDH, and Gls, displayed different levels of increment in primary SCs and TM4 cells after TGF-β3 treatment. Mitochondria respiration of SCs was shown to decrease in response to TGF-β3. Lgl2, MCT4, activity of ERK and p38 MAPK were up-regulated, whereas Akt and Notch pathway activity were inhibited by TGF-β3. Silencing of Lgl2 in SCs affected lactate production and attenuated the above effects of TGF-β3 on SC glycolysis except for Gln consumption, Gls activity, and activity of Akt, ERK, and p38. DAPT treatment in SCs antagonized glycolysis suppression caused by Lgl2-silencing. In vivo analysis revealed a stage-specific expression of Jagged1 in contrary with TGF-β3. Activating Notch signaling by re-Jagged1 resulted in restorable hypospermatogenesis and lowered lactate level in rat testis. CONCLUSION TGF-β3 induces lactate production in Sertoli cell through upregulating Lgl2, which weakened the Notch signaling activity and intensified glycolysis in SCs. Thus, besides the known function of TGF-β3 as the BTB regulator, TGF-β3-Lgl2-Notch maybe considered as an important pathway controlling Sertoli cell glycolysis and spermatogenesis. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ying Xu
- Department of Biochemistry and Molecular Biology, College of Life Science, China Medical University, 77 Puhe Road, Shenbei New District, Shen Yang, 110122, China
| | - Shuyi Jiang
- Center of Reproductive Medicine, Shengjing Hospital of China Medical University, 36 SanHao Street, Shenhe District, Shenyang, 110004, China
| | - Ying Hu
- Department of Biochemistry and Molecular Biology, College of Life Science, China Medical University, 77 Puhe Road, Shenbei New District, Shen Yang, 110122, China
| | - Qiang Zhang
- Department of Biochemistry and Molecular Biology, College of Life Science, China Medical University, 77 Puhe Road, Shenbei New District, Shen Yang, 110122, China
| | - Wenhui Su
- Department of Biochemistry and Molecular Biology, College of Life Science, China Medical University, 77 Puhe Road, Shenbei New District, Shen Yang, 110122, China.,NHC Key Laboratory of Reproductive Health and Medical Genetics, Affiliated Reproductive Hospital of China Medical University, 10 Puhe Street, Huanggu District, Shenyang, 110084, China
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Liu Z, Li W, Cao Y, Zhang X, Yang K, Yin F, Yang M, Peng P. Effects of the interaction of Notch and TLR4 pathways on inflammation and heart function in septic heart. Open Life Sci 2022; 17:744-755. [PMID: 35891967 PMCID: PMC9281592 DOI: 10.1515/biol-2022-0076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 03/22/2022] [Accepted: 04/07/2022] [Indexed: 11/15/2022] Open
Abstract
We investigated the role of the interaction between the Notch and Toll-like receptor 4 (TLR4) pathways in septic myocardial injury. The sepsis model was induced in rats with lipopolysaccharide (LPS). Rats were divided into control, LPS, LPS + TAK242 ((6R)-6-[N-(2-chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate) and LPS + DAPT (N-[N-(3,5-difluorophenacetyl)-l-alanyl]-s-phenylglycinetbutylester) groups. Heart function was evaluated with a Cardiac Doppler ultrasound. Myocardial morphological changes were detected by hematoxylin-eosin staining (H&E). Apoptosis was assessed by a TUNEL assay. The mRNA and protein levels were detected with real-time PCR, Western blot, and immunohistochemistry analysis. We found that heart function in the LPS + TAK242 group was significantly improved, but not in the LPS + DAPT group. LPS + TAK242 had a lower level of degeneration and necrosis of cardiomyocytes and inflammatory cell infiltration, as well as lower apoptosis and caspase-3 expression than the LPS group. Compared with the LPS group, the inflammatory cell infiltration was reduced in the LPS + DAPT group, while the degeneration and necrosis of cardiomyocytes were not obviously improved. Additionally, the expression levels of tumor necrosis factor-α and Interleukin-6, the protein contents of Notch intracellular domain and Hes1, and the P65 nuclear factor kappa-B (NF-κB) to P-P65 NF-κB ratio in LPS + TAK242 group and LPS + DAPT group were significantly lower than those in LPS group. Conclusively, the interaction between TLR4 and Notch signaling pathways enhances the inflammatory response in the septic heart by activating NF-κB. Blocking the TLR4 pathway with TAK242 can improve heart dysfunction and myocardial damage in sepsis, while blocking the Notch pathway with DAPT cannot effectively prevent heart dysfunction and myocardial damage in sepsis.
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Affiliation(s)
- Ziyang Liu
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Wenli Li
- Emergency Department of Internal Medicine, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Yang Cao
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Xiaoxia Zhang
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Kai Yang
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Fukang Yin
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Meng Yang
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
| | - Peng Peng
- Intensive Care Unit, Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang, China
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Li B, Ding F, Yu Y, Zhang J, Huang Q, Gong C, Wang H. Research on Confinement Effect of the Outer Steel Tube in Notched Square CFST Columns. Materials (Basel) 2022; 15:ma15155161. [PMID: 35897594 PMCID: PMC9331844 DOI: 10.3390/ma15155161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 11/16/2022]
Abstract
The outer steel tube in a concrete-filled steel tubular (CFST) column confines the core concrete and improves the compressive strength of the core concrete. When there is a notch damage in the tube, the confinement effect may be affected. The confinement effects of the notched steel tube in rectangular CFST columns were systematically investigated by using numerical approaches. Refined three-dimensional finite element models with advanced concrete constitutive relations were established. With the verified finite element modeling method, full-sized square CFST columns with horizontal, vertical, or diagonal notches at different locations of the steel tube were simulated. Stress distributions and deformation modes of the steel tube and core concrete were analyzed. Columns with a horizontal notch at the plate center location displayed a higher axial strength reduction than those with vertical notches. A parametric study was performed to investigate the influences of concrete strengths, steel strengths, steel ratios, notch length to column width ratios, and notch angles on the compressive strengths of the rectangular CFST columns. A practical design formula was proposed based on the obtained results. The proposed formula could effectively predict the influences of different notches on the confinement effect in the notched CFST columns.
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Affiliation(s)
- Biao Li
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
- China Railway Third Bureau Group Co., Ltd., Taiyuan 030001, China
| | - Faxing Ding
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
| | - Yujie Yu
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
- Correspondence:
| | - Jingke Zhang
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
- Hunan Airport Management Group Co., Ltd., Changsha 410137, China
| | - Qiong Huang
- Shenzhen Expressway Corporation Limited, Shenzhen 518057, China;
| | - Chenjie Gong
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
| | - Haibo Wang
- School of Civil Engineering, Central South University, Changsha 410075, China; (B.L.); (F.D.); (J.Z.); (C.G.); (H.W.)
- Hunan Tieyuan Civil Engineering Testing Co., Ltd., Changsha 410075, China
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Bruton FA, Kaveh A, Ross-Stewart KM, Matrone G, Oremek MEM, Solomonidis EG, Tucker CS, Mullins JJ, Lucas CD, Brittan M, Taylor JM, Rossi AG, Denvir MA. Macrophages trigger cardiomyocyte proliferation by increasing epicardial vegfaa expression during larval zebrafish heart regeneration. Dev Cell 2022; 57:1512-1528.e5. [PMID: 35688158 PMCID: PMC9616726 DOI: 10.1016/j.devcel.2022.05.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 02/11/2022] [Accepted: 05/18/2022] [Indexed: 12/01/2022]
Abstract
Cardiac injury leads to the loss of cardiomyocytes, which are rapidly replaced by the proliferation of the surviving cells in zebrafish, but not in mammals. In both the regenerative zebrafish and non-regenerative mammals, cardiac injury induces a sustained macrophage response. Macrophages are required for cardiomyocyte proliferation during zebrafish cardiac regeneration, but the mechanisms whereby macrophages facilitate this crucial process are fundamentally unknown. Using heartbeat-synchronized live imaging, RNA sequencing, and macrophage-null genotypes in the larval zebrafish cardiac injury model, we characterize macrophage function and reveal that these cells activate the epicardium, inducing cardiomyocyte proliferation. Mechanistically, macrophages are specifically recruited to the epicardial-myocardial niche, triggering the expansion of the epicardium, which upregulates vegfaa expression to induce cardiomyocyte proliferation. Our data suggest that epicardial Vegfaa augments a developmental cardiac growth pathway via increased endocardial notch signaling. The identification of this macrophage-dependent mechanism of cardiac regeneration highlights immunomodulation as a potential strategy for enhancing mammalian cardiac repair. Heart regeneration in larval zebrafish is characterized in detail Macrophage ablation blocks cardiomyocyte proliferation after cardiac injury Macrophages synapse with epicardial cells and promote their proliferation Epicardial Vegfaa drives cardiomyocyte proliferation during cardiac regeneration
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Affiliation(s)
- Finnius A Bruton
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK.
| | - Aryan Kaveh
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK; Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Katherine M Ross-Stewart
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Gianfranco Matrone
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Magdalena E M Oremek
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Emmanouil G Solomonidis
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Carl S Tucker
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - John J Mullins
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Christopher D Lucas
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Mairi Brittan
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | | | - Adriano G Rossi
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Martin A Denvir
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
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García-León MJ, Mosquera M, Cela C, Alcain J, Zuklys S, Holländer G, Toribio ML. Abrogation of Notch Signaling in Embryonic TECs Impacts Postnatal mTEC Homeostasis and Thymic Involution. Front Immunol 2022; 13:867302. [PMID: 35707539 PMCID: PMC9189879 DOI: 10.3389/fimmu.2022.867302] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/29/2022] [Indexed: 11/18/2022] Open
Abstract
Notch signaling is crucial for fate specification and maturation of thymus-seeding progenitors along the T-cell lineage. Recent studies have extended the role of Notch signaling to thymic epithelial cells (TECs), showing that Notch regulates TEC progenitor maintenance and emergence of medullary TECs (mTECs) in fetal thymopoiesis. Based on immunohistochemistry studies of spatiotemporal regulation of Notch activation in the postnatal thymus, we show that in vivo Notch activation is not confined to fetal TECs. Rather, Notch signaling, likely mediated through the Notch1 receptor, is induced in postnatal cortical and medullary TECs, and increases significantly with age in the latter, in both humans and mice, suggesting a conserved role for Notch signaling in TEC homeostasis during thymus aging. To investigate the functional impact of Notch activation in postnatal TEC biology, we used a mouse model in which RPBJκ, the transcriptional effector of canonical Notch signaling, is deleted in epithelial cells, including TECs, under the control of the transcription factor Foxn1. Immunohistochemistry and flow cytometry analyses revealed no significant differences in TEC composition in mutant (RPBJκ-KOTEC) and wild-type (WT) littermate mice at early postnatal ages. However, a significant reduction of the medullary region was observed in mutant compared to WT older thymi, which was accompanied by an accelerated decrease of postnatal mTEC numbers. Also, we found that organization and integrity of the postnatal thymic medulla critically depends on activation of the canonical Notch signaling pathway, as abrogation of Notch signaling in TECs led to the disruption of the medullary thymic microenvironment and to an accelerated thymus atrophy. These features paralleled a significant increase in the proportion of intrathymic non-T lineage cells, mostly B cells, and a slight decrease of DP thymocyte numbers compatible with a compromised thymic function in mutant mice. Therefore, impaired Notch signaling induced in embryonic development impacts postnatal TECs and leads to an accelerated mTEC degeneration and a premature thymus involution. Collectively, our data have uncovered a new role for Notch1 signaling in the control of adult mTEC homeostasis, and point toward Notch signaling manipulation as a novel strategy for thymus regeneration and functional recovery from immunosenescence.
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Affiliation(s)
- María Jesús García-León
- Immune System Development and Function Unit, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Marta Mosquera
- Immune System Development and Function Unit, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Carmela Cela
- Immune System Development and Function Unit, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Juan Alcain
- Immune System Development and Function Unit, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Saulius Zuklys
- Department of Biomedicine and University Children's Hospital of Basel, University of Basel, Basel, Switzerland
| | - Georg Holländer
- Department of Biomedicine and University Children's Hospital of Basel, University of Basel, Basel, Switzerland.,Department of Paediatrics and the Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - María L Toribio
- Immune System Development and Function Unit, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
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43
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Kwon YW. Failure Prediction of Notched Composites Using Multiscale Approach. Polymers (Basel) 2022; 14:polym14122481. [PMID: 35746057 PMCID: PMC9230953 DOI: 10.3390/polym14122481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/15/2022] [Accepted: 06/17/2022] [Indexed: 11/17/2022] Open
Abstract
This paper presents multiscale-based failure criteria to predict the failure of polymer composites with any shape of defect. The multiscale technique consists of bi-directional processes called upscaling and downscaling processes to link two different length scales. One is the microscale at the fiber and matrix material level, and the other is the macroscale at the homogenized composite material level. Failure criteria are applied to the microscale level such as micro-stresses and/or micro-strains occurring at the fiber and matrix material level. Recently proposed unified failure criteria are applied to the micro-stresses and/or micro-strains to predict failure at a notch. The new failure criteria have two parts, and they can be applied to any shape of defect. One is the stress or strain condition, and the other is the stress or strain gradient condition. For failure to occur, both conditions must be satisfied simultaneously. The failure criteria provide not only failure locations but also directions of failure propagation.
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Affiliation(s)
- Young W Kwon
- Department of Mechanical & Aerospace, Engineering, Naval Postgraduate School, Monterey, CA 93943, USA
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44
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Smith TS, Andrejeva A, Christopher J, Crook OM, Elzek M, Lilley KS. Prior Signal Acquisition Software Versions for Orbitrap Underestimate Low Isobaric Mass Tag Intensities, Without Detriment to Differential Abundance Experiments. ACS Meas Sci Au 2022; 2:233-240. [PMID: 35726249 PMCID: PMC9204819 DOI: 10.1021/acsmeasuresciau.1c00053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 06/15/2023]
Abstract
Tandem mass tags (TMTs) enable simple and accurate quantitative proteomics for multiplexed samples by relative quantification of tag reporter ions. Orbitrap quantification of reporter ions has been associated with a characteristic notch region in intensity distribution, within which few reporter intensities are recorded. This has been resolved in version 3 of the instrument acquisition software Tune. However, 47% of Orbitrap Fusion, Lumos, or Eclipse submissions to PRIDE were generated using prior software versions. To quantify the impact of the notch on existing quantitative proteomics data, we generated a mixed species benchmark and acquired quantitative data using Tune versions 2 and 3. Intensities below the notch are predominantly underestimated with Tune version 2, leading to overestimation of the true differences in intensities between samples. However, when summarizing reporter ion intensities to higher-level features, such as peptides and proteins, few features are significantly affected. Targeted removal of spectra with reporter ion intensities below the notch is not beneficial for differential peptide or protein testing. Overall, we find that the systematic quantification bias associated with the notch is not detrimental for a typical proteomics experiment.
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Affiliation(s)
- Tom S. Smith
- MRC
Toxicology Unit, University of Cambridge, Cambridge CB2 1QR, U.K.
| | - Anna Andrejeva
- Department
of Biochemistry, University of Cambridge, Cambridge CB2 1QW, U.K.
| | - Josie Christopher
- Department
of Biochemistry, University of Cambridge, Cambridge CB2 1QW, U.K.
| | - Oliver M. Crook
- Department
of Statistics, University of Oxford, Oxford OX1 3LB, U.K.
| | - Mohamed Elzek
- MRC
Toxicology Unit, University of Cambridge, Cambridge CB2 1QR, U.K.
| | - Kathryn S. Lilley
- Department
of Biochemistry, University of Cambridge, Cambridge CB2 1QW, U.K.
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45
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Sánchez-Iranzo H, Halavatyi A, Diz-Muñoz A. Strength of interactions in the Notch gene regulatory network determines patterning and fate in the notochord. eLife 2022; 11:75429. [PMID: 35658971 PMCID: PMC9170247 DOI: 10.7554/elife.75429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 04/28/2022] [Indexed: 11/13/2022] Open
Abstract
Development of multicellular organisms requires the generation of gene expression patterns that determines cell fate and organ shape. Groups of genetic interactions known as Gene Regulatory Networks (GRNs) play a key role in the generation of such patterns. However, how the topology and parameters of GRNs determine patterning in vivo remains unclear due to the complexity of most experimental systems. To address this, we use the zebrafish notochord, an organ where coin-shaped precursor cells are initially arranged in a simple unidimensional geometry. These cells then differentiate into vacuolated and sheath cells. Using newly developed transgenic tools together with in vivo imaging, we identify jag1a and her6/her9 as the main components of a Notch GRN that generates a lateral inhibition pattern and determines cell fate. Making use of this experimental system and mathematical modeling we show that lateral inhibition patterning is promoted when ligand-receptor interactions are stronger within the same cell than in neighboring cells. Altogether, we establish the zebrafish notochord as an experimental system to study pattern generation, and identify and characterize how the properties of GRNs determine self-organization of gene patterning and cell fate.
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Affiliation(s)
- Héctor Sánchez-Iranzo
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Aliaksandr Halavatyi
- Advanced Light Microscopy Facility, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Alba Diz-Muñoz
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
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46
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Sánchez M, Cicero S, Arrieta S, Martínez V. Fracture Load Predictions in Additively Manufactured ABS U- Notched Specimens Using Average Strain Energy Density Criteria. Materials (Basel) 2022; 15:2372. [PMID: 35407703 DOI: 10.3390/ma15072372] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/17/2022] [Accepted: 03/21/2022] [Indexed: 12/02/2022]
Abstract
This paper provides a methodology for the prediction of fracture loads in additively manufactured ABS material containing U-notches. The approach is based on the Average Strain Energy Density (ASED) criterion, which assumes that the material being analysed develops fully linear-elastic behaviour. Thus, in those cases where the material has a certain (non-negligible) amount of non-linear behaviour, the ASED criterion needs to be corrected. In this sense, in this paper, the ASED criterion is also combined with the Equivalent Material Concept (EMC) and the Fictitious Material Concept (FMC), both being corrections in which the non-linear real material is substituted by a linear equivalent or fictitious material, respectively. The resulting methodologies have been applied to additively manufactured ABS U-notched single-edge-notched bending (SENB) specimens combining five different notch radii (0, 0.25, 0.5, 1 and 2 mm) and three different raster orientations (0/90, 45/−45 and 30/−60). The results obtained demonstrate that both the ASED-EMC and the ASED-FMC combined criteria provide more accurate predictions than those obtained directly through the ASED criterion, with the ASED-EMC criterion generally providing safe more accurate predictions, with an average deviation from the experimental fracture loads between +1.0% (predicted loads higher than experimental loads) and −7.6% (predicted loads lower than experimental loads).
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Abstract
Cancer and neurodegenerative diseases are two of the leading causes of premature death in modern societies. Their incidence continues to increase, and in the near future, it is believed that cancer will kill more than 20 million people per year, and neurodegenerative diseases, due to the aging of the world population, will double their prevalence. The onset and the progression of both diseases are defined by dysregulation of the same molecular signaling pathways. However, whereas in cancer, these alterations lead to cell survival and proliferation, neurodegenerative diseases trigger cell death and apoptosis. The study of the mechanisms underlying these opposite final responses to the same molecular trigger is key to providing a better understanding of the diseases and finding more accurate treatments. Here, we review the ten most common signaling pathways altered in cancer and analyze them in the context of different neurodegenerative diseases such as Alzheimer's (AD), Parkinson's (PD), and Huntington's (HD) diseases.
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Affiliation(s)
- Luis Varela
- Yale Center for Molecular and Systems Metabolism, Department of Comparative Medicine, School of Medicine, Yale University, 310 Cedar St. BML 330, New Haven, CT 06520, USA
- Correspondence: (L.V.); (M.E.R.G.-R.)
| | - Maria E. R. Garcia-Rendueles
- Precision Nutrition and Cancer Program, IMDEA Food Institute, Campus Excelencia Internacional UAM+CSIC, 28049 Madrid, Spain
- Correspondence: (L.V.); (M.E.R.G.-R.)
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48
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Vignes H, Vagena-Pantoula C, Prakash M, Fukui H, Norden C, Mochizuki N, Jug F, Vermot J. Extracellular mechanical forces drive endocardial cell volume decrease during zebrafish cardiac valve morphogenesis. Dev Cell 2022; 57:598-609.e5. [PMID: 35245444 DOI: 10.1016/j.devcel.2022.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 11/09/2021] [Accepted: 02/08/2022] [Indexed: 01/11/2023]
Abstract
Organ morphogenesis involves dynamic changes of tissue properties while cells adapt to their mechanical environment through mechanosensitive pathways. How mechanical cues influence cell behaviors during morphogenesis remains unclear. Here, we studied the formation of the zebrafish atrioventricular canal (AVC) where cardiac valves develop. We show that the AVC forms within a zone of tissue convergence associated with the increased activation of the actomyosin meshwork and cell-orientation changes. We demonstrate that tissue convergence occurs with a reduction of cell volume triggered by mechanical forces and the mechanosensitive channel TRPP2/TRPV4. Finally, we show that the extracellular matrix component hyaluronic acid controls cell volume changes. Together, our data suggest that multiple force-sensitive signaling pathways converge to modulate cell volume. We conclude that cell volume reduction is a key cellular feature activated by mechanotransduction during cardiovascular morphogenesis. This work further identifies how mechanical forces and extracellular matrix influence tissue remodeling in developing organs.
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Affiliation(s)
- Hélène Vignes
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Centre National de la Recherche Scientifique UMR7104, Institut National de la Santé et de la Recherche Médicale U1258 and Université de Strasbourg, Strasbourg, Illkirch, France
| | | | - Mangal Prakash
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany; Center for Systems Biology Dresden, Dresden, Germany
| | - Hajime Fukui
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Caren Norden
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany; Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Naoki Mochizuki
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Florian Jug
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany; Center for Systems Biology Dresden, Dresden, Germany; Fondazione Human Technopole, Milan, Italy
| | - Julien Vermot
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Centre National de la Recherche Scientifique UMR7104, Institut National de la Santé et de la Recherche Médicale U1258 and Université de Strasbourg, Strasbourg, Illkirch, France; Department of Bioengineering, Imperial College London, London, UK.
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49
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Salama AM, Momeni-Boroujeni A, Vanderbilt C, Ladanyi M, Soslow R. Molecular landscape of vulvovaginal squamous cell carcinoma: new insights into molecular mechanisms of HPV-associated and HPV-independent squamous cell carcinoma. Mod Pathol 2022; 35:274-282. [PMID: 34650187 PMCID: PMC9450957 DOI: 10.1038/s41379-021-00942-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/17/2021] [Accepted: 09/27/2021] [Indexed: 02/03/2023]
Abstract
Squamous cell carcinomas of the lower female genital tract may be human papillomavirus-associated or independent. We studied the HPV status, mutational repertoire, histology, and clinical data of 28 samples from 26 patients, 65% with a vulvar primary and 35% with a vaginal primary. These represented invasive vulvovaginal squamous cell carcinomas that underwent clinical tumor-normal targeted massively parallel sequencing analysis. HPV status was determined using the HPV high-risk RNA ISH assay and/or by MSK-IMPACT. Eleven patients had HPV-associated squamous cell carcinoma (four vulvar and seven vaginal) and 15 patients had HPV-independent SqCC (13 vulvar and 2 vaginal). Well-differentiated squamous cell carcinomas were always HPV-independent. HPV-independent moderately and poorly differentiated carcinomas frequently had alterations in the NOTCH signaling pathway (6/7), which were also associated with increased tumor budding (P: 0.002). HPV-associated vulvovaginal squamous cell carcinoma had PIK3CA activating mutations (7/11, 64%) as the most common genomic event, while TERT gene alterations, mainly TERT promoter mutations (14/15 cases, 93%) featured significantly in HPV-independent carcinomas. Other common abnormalities in HPV-independent tumors were TP53 mutations (13/15, 87%), CDKN2A alterations (10/15, 67%), and NOTCH1 and FAT1 mutations (7/15, 47% each). A subset of both HPV-associated and -independent tumors had NOTCH pathway alterations (6/11, 55% and 10/15, 67% respectively), but different genes in this pathway were altered in these tumors. In summary, TERT, TP53, CDKN2A, and NOTCH1 gene alterations strongly point away from an HPV-driven process (odds ratios: 0.01, 0.07, 0, and 0, respectively with p values < 0.02 for all four genes), while PIK3CA activating mutations without the other mutations strongly favors an HPV-driven tumor (odds ratio: 10.12, p value: 0.016). HPV-independent carcinomas are more likely to be moderately-poorly differentiated with intermediate to high tumor cell budding. Cancer cell fraction analysis of HPV-independent squamous carcinomas suggests that TERT and/or NOTCH1 alterations along with TP53 alterations can be the initiating event in these tumors.
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Affiliation(s)
- Abeer M. Salama
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Chad Vanderbilt
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Marc Ladanyi
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Robert Soslow
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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50
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Hong D, Knelson EH, Li Y, Durmaz YT, Gao W, Walton E, Vajdi A, Thai T, Sticco-Ivins M, Sabet AH, Jones KL, Schinzel AC, Bronson RT, Nguyen QD, Tolstorukov MY, Vivero M, Signoretti S, Barbie DA, Oser MG. Plasticity in the Absence of NOTCH Uncovers a RUNX2-Dependent Pathway in Small Cell Lung Cancer. Cancer Res 2022; 82:248-263. [PMID: 34810201 PMCID: PMC8770597 DOI: 10.1158/0008-5472.can-21-1991] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 10/05/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022]
Abstract
Neuroendocrine to nonneuroendocrine plasticity supports small cell lung cancer (SCLC) tumorigenesis and promotes immunogenicity. Approximately 20% to 25% of SCLCs harbor loss-of-function (LOF) NOTCH mutations. Previous studies demonstrated that NOTCH functions as a SCLC tumor suppressor, but can also drive nonneuroendocrine plasticity to support SCLC growth. Given the dual functionality of NOTCH, it is not understood why SCLCs select for LOF NOTCH mutations and how these mutations affect SCLC tumorigenesis. In a CRISPR-based genetically engineered mouse model of SCLC, genetic loss of Notch1 or Notch2 modestly accelerated SCLC tumorigenesis. Interestingly, Notch-mutant SCLCs still formed nonneuroendocrine subpopulations, and these Notch-independent, nonneuroendocrine subpopulations were driven by Runx2-mediated regulation of Rest. Notch2-mutant nonneuroendocrine cells highly express innate immune signaling genes including stimulator of interferon genes (STING) and were sensitive to STING agonists. This work identifies a Notch-independent mechanism to promote nonneuroendocrine plasticity and suggests that therapeutic approaches to activate STING could be selectively beneficial for SCLCs with NOTCH2 mutations. SIGNIFICANCE: A genetically engineered mouse model of NOTCH-mutant SCLC reveals that nonneuroendocrine plasticity persists in the absence of NOTCH, driven by a RUNX2-REST-dependent pathway and innate immune signaling.
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Affiliation(s)
- Deli Hong
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Erik H Knelson
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Yixiang Li
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Yavuz T Durmaz
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Wenhua Gao
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Emily Walton
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Amir Vajdi
- Department of Informatics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Tran Thai
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Maura Sticco-Ivins
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Amin H Sabet
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Kristen L Jones
- Lurie Family Imaging Center, Center for Biomedical Imaging in Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Anna C Schinzel
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Rod T Bronson
- Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts
| | - Quang-De Nguyen
- Lurie Family Imaging Center, Center for Biomedical Imaging in Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Michael Y Tolstorukov
- Department of Informatics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Marina Vivero
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Sabina Signoretti
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - David A Barbie
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Matthew G Oser
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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