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Xu L, Guo J, Moledina DG, Cantley LG. Immune-mediated tubule atrophy promotes acute kidney injury to chronic kidney disease transition. Nat Commun 2022; 13:4892. [PMID: 35986026 PMCID: PMC9391331 DOI: 10.1038/s41467-022-32634-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 08/05/2022] [Indexed: 01/12/2023] Open
Abstract
Incomplete repair after acute kidney injury can lead to development of chronic kidney disease. To define the mechanism of this response, we compared mice subjected to identical unilateral ischemia-reperfusion kidney injury with either contralateral nephrectomy (where tubule repair predominates) or contralateral kidney intact (where tubule atrophy predominates). By day 14, the kidneys undergoing atrophy had more macrophages with higher expression of chemokines, correlating with a second wave of proinflammatory neutrophil and T cell recruitment accompanied by increased expression of tubular injury genes and a decreased proportion of differentiated tubules. Depletion of neutrophils and T cells after day 5 reduced tubular cell loss and associated kidney atrophy. In kidney biopsies from patients with acute kidney injury, T cell and neutrophil numbers negatively correlated with recovery of estimated glomerular filtration rate. Together, our findings demonstrate that macrophage persistence after injury promotes a T cell- and neutrophil-mediated proinflammatory milieu and progressive tubule damage.
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Affiliation(s)
- Leyuan Xu
- Department of Internal Medicine/Section of Nephrology, Yale University School of Medicine, New Haven, CT, USA.
| | - Jiankan Guo
- Department of Internal Medicine/Section of Nephrology, Yale University School of Medicine, New Haven, CT, USA
| | - Dennis G Moledina
- Department of Internal Medicine/Section of Nephrology, Yale University School of Medicine, New Haven, CT, USA
| | - Lloyd G Cantley
- Department of Internal Medicine/Section of Nephrology, Yale University School of Medicine, New Haven, CT, USA.
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2
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Cadherin‑16 inhibits thyroid carcinoma cell proliferation and invasion. Oncol Lett 2022; 23:145. [PMID: 35350592 PMCID: PMC8941525 DOI: 10.3892/ol.2022.13265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 03/04/2022] [Indexed: 11/11/2022] Open
Abstract
Cadherin-16 (CDH16), a member of the cadherin family of adhesion molecules, serves an important role in the formation and maintenance of the thyroid follicular lumen. Decreased expression of CDH16 has been reported to be associated with tumor stage in papillary thyroid cancer (PTC); however, previous analyses have been limited and the biological role of CDH16 in different subtypes of TC is unknown. To investigate the role of CDH16 in the occurrence and development of TC, bioinformatic analysis of three TC subtypes (PTC, follicular cell-derived TC and anaplastic TC) was performed using an extended data set from the Gene Expression Omnibus database, with additional confirmation using data from The Cancer Genome Atlas, as well as biopsies from 35 patients with PTC and TC or follicular cell lines. According to the dataset analysis, CDH16 was downregulated in PTC and follicular cell-derived and anaplastic TC; the downregulation in PTC was independent of DNA copy number variation. Furthermore, low expression levels of CDH16 were significantly correlated with tumor size, lymph node metastasis status and disease stage in 35 patients with PTC. Gene Set Enrichment Analysis suggested that CDH16 participated in DNA replication and cell adhesion pathways. To evaluate CDH16 activity, CDH16 was overexpressed in TC-derived BCPAP cells. CDH16 overexpression inhibited cell proliferation, migration and invasion and induced apoptosis by downregulating proteins associated with DNA replication and cell adhesion. These results support the identification of CDH16 as a valuable target for TC prognosis and therapy and, to the best of our knowledge, represent the first direct demonstration of its mechanistic role in TC.
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Maru Y, Hippo Y. Two-Way Development of the Genetic Model for Endometrial Tumorigenesis in Mice: Current and Future Perspectives. Front Genet 2021; 12:798628. [PMID: 34956336 PMCID: PMC8696168 DOI: 10.3389/fgene.2021.798628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/23/2021] [Indexed: 12/23/2022] Open
Abstract
Endometrial cancer (EC) is the most common malignancy of the female reproductive tract worldwide. Although comprehensive genomic analyses of EC have already uncovered many recurrent genetic alterations and deregulated signaling pathways, its disease model has been limited in quantity and quality. Here, we review the current status of genetic models for EC in mice, which have been developed in two distinct ways at the level of organisms and cells. Accordingly, we first describe the in vivo model using genetic engineering. This approach has been applied to only a subset of genes, with a primary focus on Pten inactivation, given that PTEN is the most frequently altered gene in human EC. In these models, the tissue specificity in genetic engineering determined by the Cre transgenic line has been insufficient. Consequently, the molecular mechanisms underlying EC development remain poorly understood, and preclinical models are still limited in number. Recently, refined Cre transgenic mice have been created to address this issue. With highly specific gene recombination in the endometrial cell lineage, acceptable in vivo modeling of EC development is warranted using these Cre lines. Second, we illustrate an emerging cell-based model. This hybrid approach comprises ex vivo genetic engineering of organoids and in vivo tumor development in immunocompromised mice. Although only a few successful cases have been reported as proof of concept, this approach allows quick and comprehensive analysis, ensuring a high potential for reconstituting carcinogenesis. Hence, ex vivo/in vivo hybrid modeling of EC development and its comparison with corresponding in vivo models may dramatically accelerate EC research. Finally, we provide perspectives on future directions of EC modeling.
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Affiliation(s)
- Yoshiaki Maru
- Department of Molecular Carcinogenesis, Chiba Cancer Center Research Institute, Chiba, Japan
| | - Yoshitaka Hippo
- Department of Molecular Carcinogenesis, Chiba Cancer Center Research Institute, Chiba, Japan
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4
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Thomson RB, Dynia DW, Burlein S, Thomson BR, Booth CJ, Knauf F, Wang T, Aronson PS. Deletion of Cdh16 Ksp-cadherin leads to a developmental delay in the ability to maximally concentrate urine in mouse. Am J Physiol Renal Physiol 2021; 320:F1106-F1122. [PMID: 33938239 DOI: 10.1152/ajprenal.00556.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Ksp-cadherin (cadherin-16) is an atypical member of the cadherin superfamily of cell adhesion molecules that is ubiquitously expressed on the basolateral membrane of epithelial cells lining the nephron and the collecting system of the mammalian kidney. The principal aim of the present study was to determine if Ksp-cadherin played a critical role in the development and maintenance of the adult mammalian kidney by generating and evaluating a mouse line deficient in Ksp-cadherin. Ksp-null mutant animals were viable and fertile, and kidneys from both neonates and adults showed no evidence of structural abnormalities. Immunolocalization and Western blot analyses of Na+-K+-ATPase and E-cadherin indicated that Ksp-cadherin is not essential for either the genesis or maintenance of the polarized tubular epithelial phenotype. Moreover, E-cadherin expression was not altered to compensate for Ksp-cadherin loss. Plasma electrolytes, total CO2, blood urea nitrogen, and creatinine levels were also unaffected by Ksp-cadherin deficiency. However, a subtle but significant developmental delay in the ability to maximally concentrate urine was detected in Ksp-null mice. Expression analysis of the principal proteins involved in the generation of the corticomedullary osmotic gradient and the resultant movement of water identified misexpression of aquaporin-2 in the inner medullary collecting duct as the possible cause for the inability of young adult Ksp-cadherin-deficient animals to maximally concentrate their urine. In conclusion, Ksp-cadherin is not required for normal kidney development, but its absence leads to a developmental delay in maximal urinary concentrating ability.NEW & NOTEWORTHY Ksp-cadherin (cadherin-16) is an atypical member of the cadherin superfamily of cell adhesion molecules that is ubiquitously expressed on the basolateral membrane of epithelial cells lining the nephron and the collecting system. Using knockout mice, we found that Ksp-cadherin is in fact not required for kidney development despite its high and specific expression along the nephron. However, its absence leads to a developmental delay in maximal urinary concentrating ability.
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Affiliation(s)
- R B Thomson
- Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut
| | - D W Dynia
- Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut
| | - S Burlein
- Department of Nephrology and Hypertension, Friedrich Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - B R Thomson
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - C J Booth
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - F Knauf
- Department of Nephrology and Medical Intensive Care, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - T Wang
- Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
| | - P S Aronson
- Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut.,Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
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5
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Gray ME, Sotomayor M. Crystal structure of the nonclassical cadherin-17 N-terminus and implications for its adhesive binding mechanism. Acta Crystallogr F Struct Biol Commun 2021; 77:85-94. [PMID: 33682793 PMCID: PMC7938635 DOI: 10.1107/s2053230x21002247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/25/2021] [Indexed: 12/27/2022] Open
Abstract
The cadherin superfamily of calcium-dependent cell-adhesion proteins has over 100 members in the human genome. All members of the superfamily feature at least a pair of extracellular cadherin (EC) repeats with calcium-binding sites in the EC linker region. The EC repeats across family members form distinct complexes that mediate cellular adhesion. For instance, classical cadherins (five EC repeats) strand-swap their N-termini and exchange tryptophan residues in EC1, while the clustered protocadherins (six EC repeats) use an extended antiparallel `forearm handshake' involving repeats EC1-EC4. The 7D-cadherins, cadherin-16 (CDH16) and cadherin-17 (CDH17), are the most similar to classical cadherins and have seven EC repeats, two of which are likely to have arisen from gene duplication of EC1-2 from a classical ancestor. However, CDH16 and CDH17 lack the EC1 tryptophan residue used by classical cadherins to mediate adhesion. The structure of human CDH17 EC1-2 presented here reveals features that are not seen in classical cadherins and that are incompatible with the EC1 strand-swap mechanism for adhesion. Analyses of crystal contacts, predicted glycosylation and disease-related mutations are presented along with sequence alignments suggesting that the novel features in the CDH17 EC1-2 structure are well conserved. These results hint at distinct adhesive properties for 7D-cadherins.
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Affiliation(s)
- Michelle E. Gray
- Department of Chemistry and Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA
| | - Marcos Sotomayor
- Department of Chemistry and Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA
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6
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Ye J, He J, Li N. Molecular identification and characterization of pig's Cdh16 gene. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2018.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Asico LD, Cuevas S, Ma X, Jose PA, Armando I, Konkalmatt PR. Nephron segment-specific gene expression using AAV vectors. Biochem Biophys Res Commun 2018; 497:19-24. [PMID: 29407172 PMCID: PMC5893140 DOI: 10.1016/j.bbrc.2018.01.169] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 01/27/2018] [Indexed: 11/02/2022]
Abstract
AAV9 vector provides efficient gene transfer in all segments of the renal nephron, with minimum expression in non-renal cells, when administered retrogradely via the ureter. It is important to restrict the transgene expression to the desired cell type within the kidney, so that the physiological endpoints represent the function of the transgene expressed in that specific cell type within kidney. We hypothesized that segment-specific gene expression within the kidney can be accomplished using the highly efficient AAV9 vectors carrying the promoters of genes that are expressed exclusively in the desired segment of the nephron in combination with administration by retrograde infusion into the kidney via the ureter. We constructed AAV vectors carrying eGFP under the control of: kidney-specific cadherin (KSPC) gene promoter for expression in the entire nephron; Na+/glucose co-transporter (SGLT2) gene promoter for expression in the S1 and S2 segments of the proximal tubule; sodium, potassium, 2 chloride co-transporter (NKCC2) gene promoter for expression in the thick ascending limb of Henle's loop (TALH); E-cadherin (ECAD) gene promoter for expression in the collecting duct (CD); and cytomegalovirus (CMV) early promoter that provides expression in most of the mammalian cells, as control. We tested the specificity of the promoter constructs in vitro for cell type-specific expression in mouse kidney cells in primary culture, followed by retrograde infusion of the AAV vectors via the ureter in the mouse. Our data show that AAV9 vector, in combination with the segment-specific promoters administered by retrograde infusion via the ureter, provides renal nephron segment-specific gene expression.
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Affiliation(s)
- Laureano D Asico
- Department of Medicine, The George Washington University, Washington, DC, USA
| | - Santiago Cuevas
- Department of Medicine, The George Washington University, Washington, DC, USA
| | - Xiaobo Ma
- Department of Medicine, The George Washington University, Washington, DC, USA
| | - Pedro A Jose
- Department of Medicine, The George Washington University, Washington, DC, USA; Department of Pharmacology and Physiology, The George Washington University, Washington, DC, USA
| | - Ines Armando
- Department of Medicine, The George Washington University, Washington, DC, USA
| | - Prasad R Konkalmatt
- Department of Medicine, The George Washington University, Washington, DC, USA.
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Smad7 protects against acute kidney injury by rescuing tubular epithelial cells from the G1 cell cycle arrest. Clin Sci (Lond) 2017; 131:1955-1969. [PMID: 28566468 DOI: 10.1042/cs20170127] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/30/2017] [Accepted: 05/31/2017] [Indexed: 12/16/2022]
Abstract
Smad7 plays a protective role in chronic kidney disease; however, its role in acute kidney injury (AKI) remains unexplored. Here, we report that Smad7 protects against AKI by rescuing the G1 cell cycle arrest of tubular epithelial cells (TECs) in ischemia/reperfusion-induced AKI in mice in which Smad7 gene is disrupted or restored locally into the kidney. In Smad7 gene knockout (KO) mice, more severe renal impairment including higher levels of serum creatinine and massive tubular necrosis was developed at 48 h after AKI. In contrast, restored renal Smad7 gene locally into the kidney of Smad7 KO mice protected against AKI by promoting TEC proliferation identified by PCNA+ and BrdU+ cells. Mechanistic studies revealed that worsen AKI in Smad7 KO mice was associated with a marked activation of TGF-β/Smad3-p21/p27 signaling and a loss of CDK2/cyclin E activities, thereby impairing TEC regeneration at the G1 cell cycle arrest. In contrast, restored Smad7 locally into the kidneys of Smad7 KO mice protected TECs from the G1 cell cycle arrest and promoted TEC G1/S transition via a CDK2/cyclin E-dependent mechanism. In conclusion, Smad7 plays a protective role in AKI. Blockade of TGF-β/Smad3-p21/p27-induced G1 cell cycle arrest may be a key mechanism by which Smad7 treatment inhibits AKI. Thus, Smad7 may be a novel therapeutic agent for AKI.
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Liu J, Xue W, Xiang H, Zheng J, Zhao Y, Jiao L, Jiao Z. Cathelicidin PR-39 peptide inhibits hypoxia/reperfusion-induced kidney cell apoptosis by suppression of the endoplasmic reticulum-stress pathway. Acta Biochim Biophys Sin (Shanghai) 2016; 48:714-22. [PMID: 27353320 DOI: 10.1093/abbs/gmw061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/23/2016] [Indexed: 12/18/2022] Open
Abstract
Ischemia/reperfusion injury (IRI) is a major cause of acute kidney damage, which often occurs in deceased donor kidney transplants. Cathelicidin PR-39 peptide possesses anti-inflammatory and wound repair effects through tissue angiogenesis and anti-apoptosis. This study assessed the role of PR-39 in anti-apoptosis in vitro using a lentiviral vector with a kidney specific promoter (KSP) to drive PR-39 expression. Our data revealed that PR-39 peptide was specifically over-expressed in kidney-derived HK-2 cells, but was scarcely detected in non-kidney tissue-derived cells. PR-39 over-expression had a protective role in the hypoxia/re-oxygenation (H/R) treated cells. The anti-apoptotic activity of PR-39 peptide was mediated by the inhibition of caspase-2, caspase-12 and caspase-3 activity in the endoplasmic reticulum (ER) stress-induced apoptotic pathway. It was also revealed that the anti-apoptotic effect of PR-39 peptide was mediated by an apoptosis-related protein, cellular inhibitor apoptosis protein-2 (c-IAP-2). Taken together, the current data demonstrate that PR-39 expression driven by KSP could prevent kidney damage (apoptosis) from IRI via the ER stress-induced apoptotic pathway.
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Affiliation(s)
- Jing Liu
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Wujun Xue
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Heli Xiang
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Jin Zheng
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Yanlong Zhao
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Lizi Jiao
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Zizhao Jiao
- Department of Kidney Transplant, Hospital of Nephrology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
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Pelosi B, Migliarini S, Pacini G, Pratelli M, Pasqualetti M. Generation of Pet1210-Cre transgenic mouse line reveals non-serotonergic expression domains of Pet1 both in CNS and periphery. PLoS One 2014; 9:e104318. [PMID: 25098329 PMCID: PMC4123907 DOI: 10.1371/journal.pone.0104318] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 07/07/2014] [Indexed: 01/04/2023] Open
Abstract
Neurons producing serotonin (5-hydroxytryptamine, 5-HT) constitute one of the most widely distributed neuronal networks in the mammalian central nervous system (CNS) and exhibit a profuse innervation throughout the CNS already at early stages of development. Serotonergic neuron specification is controlled by a combination of secreted molecules and transcription factors such as Shh, Fgf4/8, Nkx2.2, Lmx1b and Pet1. In the mouse, Pet1 mRNA expression appears between 10 and 11 days post coitum (dpc) in serotonergic post-mitotic precursors and persists in serotonergic neurons up to adulthood, where it promotes the expression of genes defining the mature serotonergic phenotype such as tryptophan hydroxylase 2 (Tph2) and serotonin transporter (SERT). Hence, the generation of genetic tools based on Pet1 specific expression represents a valuable approach to study the development and function of the serotonergic system. Here, we report the generation of a Pet1210-Cre transgenic mouse line in which the Cre recombinase is expressed under the control of a 210 kb fragment from the Pet1 genetic locus to ensure a reliable and faithful control of somatic recombination in Pet1 cell lineage. Besides Cre-mediated recombination accurately occurred in the serotonergic system as expected and according to previous studies, Pet1210-Cre transgenic mouse line allowed us to identify novel, so far uncharacterized, Pet1 expression domains. Indeed, we showed that in the raphe Pet1 is expressed also in a non-serotonergic neuronal population intermingled with Tph2-expressing cells and mostly localized in the B8 and B9 nuclei. Moreover, we detected Cre-mediated recombination also in the developing pancreas and in the ureteric bud derivatives of the kidney, where it reflected a specific Pet1 expression. Thus, Pet1210-Cre transgenic mouse line faithfully drives Cre-mediated recombination in all Pet1 expression domains representing a valuable tool to genetically manipulate serotonergic and non-serotonergic Pet1 cell lineages.
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Affiliation(s)
- Barbara Pelosi
- Department of Biology, Unit of Cell and Developmental Biology, University of Pisa, Pisa, Italy
| | - Sara Migliarini
- Department of Biology, Unit of Cell and Developmental Biology, University of Pisa, Pisa, Italy
| | - Giulia Pacini
- Department of Biology, Unit of Cell and Developmental Biology, University of Pisa, Pisa, Italy
| | - Marta Pratelli
- Department of Biology, Unit of Cell and Developmental Biology, University of Pisa, Pisa, Italy
| | - Massimo Pasqualetti
- Department of Biology, Unit of Cell and Developmental Biology, University of Pisa, Pisa, Italy
- Istituto Italiano di Tecnologia, Center for Neuroscience and Cognitive Systems @UniTn, Rovereto, Italy
- * E-mail:
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11
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Baumgartner W. Possible roles of LI-Cadherin in the formation and maintenance of the intestinal epithelial barrier. Tissue Barriers 2014; 1:e23815. [PMID: 24665380 PMCID: PMC3879124 DOI: 10.4161/tisb.23815] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 01/29/2013] [Accepted: 01/29/2013] [Indexed: 02/07/2023] Open
Abstract
LI-cadherin belongs to the so called 7D-cadherins, exceptional members of the cadherin superfamily which are characterized by seven extracellular cadherin repeats and a small cytosolic domain. Under physiological conditions LI-cadherin is expressed in the intestine and colon in human and mouse and in the rat also in hepatocytes. LI-cadherin was shown to act as a functional Ca2+-dependent adhesion molecule, linking neighboring cells and a lot of biophysical and biochemical parameters were determined in the last time. It is also known that dysregulated LI-cadherin expression can be found in a variety of diseases. Although there are several hypothesis and theoretical models concerning the function of LI-cadherin, the physiological role of LI-cadherin is still enigmatic.
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Affiliation(s)
- Werner Baumgartner
- Department of Cellular Neurobionics; RWTH-Aachen University; Aachen; Germany
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12
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Calì G, Gentile F, Mogavero S, Pallante P, Nitsch R, Ciancia G, Ferraro A, Fusco A, Nitsch L. CDH16/Ksp-cadherin is expressed in the developing thyroid gland and is strongly down-regulated in thyroid carcinomas. Endocrinology 2012; 153:522-34. [PMID: 22028439 DOI: 10.1210/en.2011-1572] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cadherin (CDH)16/kidney-specific-cadherin was first described as a kidney-specific adhesion molecule and thereafter found expressed also in the thyroid gland. We show here that CDH16 fully colocalizes with CDH1/E-cadherin on the basolateral plasma membrane of mouse and human thyrocytes. In thyrocyte cultures, the expression of CDH16 is dependent upon TSH, as other thyroid differentiation markers. In the developing mouse thyroid, CDH16 is expressed at embryonic day 10.5, 1-2 d after the main thyroid-specific transcription factors involved in thyroid cell differentiation. In human thyroid carcinomas, as determined by quantitative RT-PCR, CDH16 expression decreases in papillary, follicular, and anaplastic thyroid carcinomas, and the decrease is more pronounced than that of CDH1. Moreover, by immunofluorescence and confocal microscopy, it appears that although CDH16-negative tumor cells may still be positive for CDH1, CDH1-negative cells are also negative for CDH16, indicating a more extensive loss of the latter and suggesting that CDH16 loss might precede that of CDH1. Loss of CDH16 appears to be a marker of epithelial-mesenchymal transition as indicated by its decrease in cultured thyroid cells after TGF-β treatment. Finally, the decrease in CDH16 is paralleled in part by the decrease in α B-crystallin, which was proposed to mediate the interaction of CDH16 cytosolic tail with the cell cytoskeleton. In conclusion, CDH16 is a thyroid-selective and hormone-dependent adhesion protein that might play a role during thyroid development and that may be a useful marker to monitor thyroid carcinomas.
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Affiliation(s)
- Gaetano Calì
- Istituto di Endocrinologia ed Oncologia Sperimentale del Consiglio Nazionale delle Ricerche, 80131 Napoli, Italy
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13
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Horstmann M, Geiger LM, Vogel U, Schmid H, Hennenlotter J, Kuehs U, Merseburger AS, Kruck S, Stenzl A, Bedke J. Kidney-specific cadherin correlates with the ontogenetic origin of renal cell carcinoma subtypes: an indicator of a malignant potential? World J Urol 2011; 30:525-31. [PMID: 21928123 DOI: 10.1007/s00345-011-0763-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 09/03/2011] [Indexed: 10/17/2022] Open
Abstract
INTRODUCTION AND OBJECTIVES To evaluate retrospectively kidney-specific cadherin (Ksp-cad) expression in renal cell carcinoma (RCC) subtypes and oncocytoma in correlation with its ontogenetic origin of distal and proximal tubules and to correlate Ksp-cad expression with tumour characteristics. MATERIALS AND METHODS Membranous and cytoplasmic expression of Ksp-cad was determined in 40 clear cell (ccRCC), 25 papillary (pRCC), 19 chromophobe carcinomas (chRCC), 27 oncocytomas (oncocytomas) (n = 111) and 32 benign kidney parenchyma specimens separated in distal tubules (DT) and proximal tubules (PT) by immunohistochemistry using tissue microarray technique. Staining intensity was quantified as a score ranging from 0 to 12. Comparison of data and correlation with tumour characteristics were done by Wilcoxon/Kruskal-Wallis tests (post hoc Tukey-Kramer analysis). RESULTS In benign renal tissue, membranous and cytoplasmic expression of Ksp-cad in the DT was significantly higher than that in the PT (12.0 ± 0 vs. 5.2 ± 0.3 and 6.3 ± 0.5 vs. 0.0 ± 0.0, respectively; (P < 0.05)). Membranous KSP-cad expression was significantly higher in chRCC (5.2 ± 0.8) and oncocytomas (3.7 ± 0.4) than that in ccRCC (0.8 ± 0.2) and pRCC (1.4 ± 0.4; P < 0.05), while expression between oncocytomas and chRCC did not differ significantly. In RCC, Ksp-cad expression was significantly associated with higher T stage and the occurrence of synchronous metastasis (P < 0.05). Higher N stages and grading tended to correlate with a lower Ksp-cad expression. CONCLUSIONS In this cohort, the origin of tumour subtypes-chRCC and oncocytomas develop from DT and ccRCC and pRCC from PT cells-is mirrored by the respective Ksp-cad expression. This raises the question whether DT-derived tumours have a less malignant potential than PT-derived tumours.
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Affiliation(s)
- M Horstmann
- Department of Urology, Eberhard Karls University Tuebingen, Hoppe-Seyler-Strasse 3, Tuebingen, Germany.
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14
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Silberschmidt D, Rodriguez-Mallon A, Mithboakar P, Calì G, Amendola E, Sanges R, Zannini M, Scarfò M, De Luca P, Nitsch L, Di Lauro R, De Felice M. In vivo role of different domains and of phosphorylation in the transcription factor Nkx2-1. BMC DEVELOPMENTAL BIOLOGY 2011; 11:9. [PMID: 21345181 PMCID: PMC3055846 DOI: 10.1186/1471-213x-11-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 02/23/2011] [Indexed: 11/11/2022]
Abstract
Background The transcription factor Nkx2-1 (also known as TTF-1, Titf1 or T/EBP) contains two apparently redundant activation domains and is post-translationally modified by phosphorylation. We have generated mouse mutant strains to assess the roles of the two activation domains and of phosphorylation in mouse development and differentiation. Results Mouse strains expressing variants of the transcription factor Nkx2-1 deleted of either activation domain have been constructed. Phenotypic analysis shows for each mutant a distinct set of defects demonstrating that distinct portions of the protein endow diverse developmental functions of Nkx2-1. Furthermore, a mouse strain expressing a Nkx2-1 protein mutated in the phosphorylation sites shows a thyroid gland with deranged follicular organization and gene expression profile demonstrating the functional role of phosphorylation in Nkx2-1. Conclusions The pleiotropic functions of Nkx2-1 are not all due to the protein as a whole since some of them can be assigned to separate domains of the protein or to specific post-translational modifications. These results have implication for the evolutionary role of mutations in transcription factors.
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15
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Cyr DG, Gregory M, Dubé E, Dufresne J, Chan PTK, Hermo L. Orchestration of occludins, claudins, catenins and cadherins as players involved in maintenance of the blood-epididymal barrier in animals and humans. Asian J Androl 2007; 9:463-75. [PMID: 17589783 DOI: 10.1111/j.1745-7262.2007.00308.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Although spermatozoa are formed during spermatogenesis in the testis, testicular spermatozoa are immature and cannot swim or fertilize. These critical spermatozoal functions are acquired in the epididymis where a specific luminal environment is created by the blood-epididymal barrier; proteins secreted by epididymal principal cells bind to maturing spermatozoa and regulate the maturational process of the spermatozoa. In the epididymis, epithelial cell-cell interactions are mediated by adhering junctions, necessary for cell adhesion, and by tight junctions, which form the blood-epididymal barrier. The regulation of these cellular junctions is thought to represent a key determinant in the process of sperm maturation within the epididymis. Tight junctions between adjacent principal cells permit the formation of a specific microenvironment in the lumen of the epididymis that is essential for sperm maturation. Although we have made significant progress in understanding epididymal function and the blood-epididymal barrier, using animal models, there is limited information on the human epididymis. If we are to understand the normal and pathological conditions attributable to human epididymal function, we must clearly establish the physiological, cellular and molecular regulation of the human epididymis, develop tools to characterize these functions and develop clinical strategies that will use epididymal functions to improve treatment of infertility.
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Affiliation(s)
- Daniel G Cyr
- INRS-Institut Armand Frappier, Université du Québec, 245 Hymus Boulevard, Pointe Claire, Quebec H9R 1G6, Canada.
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Fujarewicz K, Jarząb M, Eszlinger M, Krohn K, Paschke R, Oczko-Wojciechowska M, Wiench M, Kukulska A, Jarząb B, Świerniak A. A multi-gene approach to differentiate papillary thyroid carcinoma from benign lesions: gene selection using support vector machines with bootstrapping. Endocr Relat Cancer 2007; 14:809-26. [PMID: 17914110 PMCID: PMC2216417 DOI: 10.1677/erc-06-0048] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Selection of novel molecular markers is an important goal of cancer genomics studies. The aim of our analysis was to apply the multivariate bioinformatical tools to rank the genes - potential markers of papillary thyroid cancer (PTC) according to their diagnostic usefulness. We also assessed the accuracy of benign/malignant classification, based on gene expression profiling, for PTC. We analyzed a 180-array dataset (90 HG-U95A and 90 HG-U133A oligonucleotide arrays), which included a collection of 57 PTCs, 61 benign thyroid tumors, and 62 apparently normal tissues. Gene selection was carried out by the support vector machines method with bootstrapping, which allowed us 1) ranking the genes that were most important for classification quality and appeared most frequently in the classifiers (bootstrap-based feature ranking, BBFR); 2) ranking the samples, and thus detecting cases that were most difficult to classify (bootstrap-based outlier detection). The accuracy of PTC diagnosis was 98.5% for a 20-gene classifier, its 95% confidence interval (CI) was 95.9-100%, with the lower limit of CI exceeding 95% already for five genes. Only 5 of 180 samples (2.8%) were misclassified in more than 10% of bootstrap iterations. We specified 43 genes which are most suitable as molecular markers of PTC, among them some well-known PTC markers (MET, fibronectin 1, dipeptidylpeptidase 4, or adenosine A1 receptor) and potential new ones (UDP-galactose-4-epimerase, cadherin 16, gap junction protein 3, sushi, nidogen, and EGF-like domains 1, inhibitor of DNA binding 3, RUNX1, leiomodin 1, F-box protein 9, and tripartite motif-containing 58). The highest ranking gene, metallophosphoesterase domain-containing protein 2, achieved 96.7% of the maximum BBFR score.
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Affiliation(s)
- Krzysztof Fujarewicz
- Systems Engineering Group, Institute of Automatic Control, Silesian University of Technology44-100 GliwicePoland
| | - Michał Jarząb
- Department of Tumor Biology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer Center, Gliwice BranchGliwice 44-100Poland
- Department of Clinical Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer Center, Gliwice BranchGliwice 44-100Poland
| | - Markus Eszlinger
- III. Medical Department, University of LeipzigLeipzig 04103Germany
| | - Knut Krohn
- III. Medical Department, University of LeipzigLeipzig 04103Germany
- Interdisciplinary Center of Clinical Research Leipzig, University of LeipzigLeipzig 04103Germany
| | - Ralf Paschke
- III. Medical Department, University of LeipzigLeipzig 04103Germany
| | - Małgorzata Oczko-Wojciechowska
- Department of Nuclear Medicine and Endocrine Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer CenterGliwice Branch, Wybrzeże Armii Krajowej 15, Gliwice 44-100Poland
| | - Małgorzata Wiench
- Department of Nuclear Medicine and Endocrine Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer CenterGliwice Branch, Wybrzeże Armii Krajowej 15, Gliwice 44-100Poland
| | - Aleksandra Kukulska
- Department of Nuclear Medicine and Endocrine Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer CenterGliwice Branch, Wybrzeże Armii Krajowej 15, Gliwice 44-100Poland
| | - Barbara Jarząb
- Department of Nuclear Medicine and Endocrine Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer CenterGliwice Branch, Wybrzeże Armii Krajowej 15, Gliwice 44-100Poland
- (Requests for offprints should be addressed to B Jarząb; )
| | - Andrzej Świerniak
- Systems Engineering Group, Institute of Automatic Control, Silesian University of Technology44-100 GliwicePoland
- Department of Nuclear Medicine and Endocrine Oncology, Institute of Oncology, Maria Skłodowska-Curie Memorial Cancer CenterGliwice Branch, Wybrzeże Armii Krajowej 15, Gliwice 44-100Poland
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17
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Calì G, Zannini M, Rubini P, Tacchetti C, D'Andrea B, Affuso A, Wintermantel T, Boussadia O, Terracciano D, Silberschmidt D, Amendola E, De Felice M, Schütz G, Kemler R, Di Lauro R, Nitsch L. Conditional inactivation of the E-cadherin gene in thyroid follicular cells affects gland development but does not impair junction formation. Endocrinology 2007; 148:2737-46. [PMID: 17347311 DOI: 10.1210/en.2006-1344] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We have conditionally inactivated the E-cadherin gene in the thyroid follicular cells of mouse embryo to unravel its role in thyroid development. We used the Cre-loxP system in which the Cre-recombinase was expressed under the control of the tissue-specific thyroglobulin promoter that becomes active at embryonic d 15. At postnatal d 7, thyroid follicle lumens in the knockout mice were about 30% smaller with respect to control mice and had an irregular shape. E-cadherin was almost completely absent in thyrocytes, beta-catenin was significantly reduced, whereas no change in gamma-catenin was detected. alpha-Catenin was also reduced on the cell plasma membrane. Despite the dramatic loss of E-cadherin and beta-catenin, cell-cell junctions were not affected, the distribution of tight junction proteins was unaltered, and no increase of thyroglobulin circulating in the blood was observed. In addition, we found that other members of the cadherin family, the R-cadherin and the Ksp-cadherin, were expressed in thyrocytes and that their membrane distribution was not altered in the E-cadherin conditional knockout mouse. Our results indicate that E-cadherin has a role in the development of the thyroid gland and in the expression of beta-catenin, but it is not essential for the maintenance of follicular cell adhesion.
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Affiliation(s)
- Gaetano Calì
- Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Richerche, 80131 Naples, Italy
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18
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Adley BP, Gupta A, Lin F, Luan C, Teh BT, Yang XJ. Expression of Kidney-Specific Cadherin in Chromophobe Renal Cell Carcinoma and Renal Oncocytoma. Am J Clin Pathol 2006. [DOI: 10.1309/jfe2b57yqfpwpl10] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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19
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Shen SS, Krishna B, Chirala R, Amato RJ, Truong LD. Kidney-specific cadherin, a specific marker for the distal portion of the nephron and related renal neoplasms. Mod Pathol 2005; 18:933-40. [PMID: 15696118 DOI: 10.1038/modpathol.3800373] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Renal cell neoplasms are presumably derived from different cell types of the nephron. Clear cell and papillary renal cell carcinoma (RCC) are thought to be of proximal tubular origin, whereas oncocytoma and chromophobe RCC are derived from intercalated cells of distal nephron. A few molecules, such as RCC marker and CD10, have been shown to be markers for clear cell RCC and papillary RCC. Such markers are not yet available for renal tumors presumably of the distal nephron. The expression of kidney-specific (Ksp) cadherin, a recently cloned gene thought to be transcribed exclusively in the kidney, was studied in normal human kidney, as well as in 105 primary renal neoplasms, including 42 clear cell RCC, 30 papillary RCC, 13 chromophobe RCC, and 20 oncocytomas. The expression patterns were compared with those of RCC marker. The Ksp-cadherin expression was noted preferentially in distal convoluted tubules with a basolateral membrane stain in normal kidney. All 13 chromophobe RCC and 19 of 20 oncocytomas showed diffuse and strong immunoreactivity for Ksp-cadherin, while only 14% clear cell RCC and 13% papillary RCC showed focal positivity. The RCC marker expression was detected in 85%, 98%, 15% and 0% of clear cell RCC, papillary RCC, chromophobe RCC, and oncocytoma, respectively. A few clear cell RCC and papillary RCC showed dual expression of both RCC marker and Ksp-cadherin, which appear to have distinct histologic features. These results demonstrated high sensitivity and specificity of Ksp-cadherin for distal convoluted tubules, which can be used as adjunct for diagnosis of chromophobe RCC.
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Affiliation(s)
- Steven S Shen
- Department of Pathology, The Methodist Hospital, Baylor College of Medicine, Houston, TX 77030, USA.
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20
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Rakha EA, Armour JAL, Pinder SE, Paish CE, Ellis IO. High-resolution analysis of 16q22.1 in breast carcinoma using DNA amplifiable probes (multiplex amplifiable probe hybridization technique) and immunohistochemistry. Int J Cancer 2005; 114:720-9. [PMID: 15609312 DOI: 10.1002/ijc.20738] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Loss of the chromosomal material at 16q22.1 is one of the most frequent genetic aberrations found in both lobular and low-grade nonlobular invasive carcinoma of the breast, indicating the presence of a tumour suppressor gene (TSG) at this region in these tumours. However, the TSG (s) at the 16q22.1 in the more frequent nonlobular carcinomas is still unknown. Multiplex Amplifiable Probe Hybridisation (MAPH) is a simple, accurate and a high-resolution technique that provides an alternative approach to DNA copy-number measurement. The aim of our study was to examine the most likely candidate genes at 16q22.1 using MAPH assay combined with protein expression analysis by immunohistochemistry. We identified deletion at 16q22.1 that involves some or all of these genes. We also noticed that the smallest region of deletion at 16q22.1 could be delineated to a 3 Mb region centromeric to the P-cadherin gene. Apart from the correlation between E-cadherin protein expression and its gene copy number, no correlation was detected between the expression of E2F-4, CTCF, TRF2 or P-cadherin with their gene's copy number. In the malignant tissues, no significant loss or decrease of protein expression of any gene other than E-cadherin was seen in association with any specific tumour type. No expression of VE-cadherin or Ksp-cadherin was detected in the normal and/or malignant tissues of the breast in these cases. However, there was a correlation between increased nuclear expression of E2F-4 and tumours with higher histological grade (p = 0.04) and positive lymph node disease (p = 0.02), suggesting that it may have an oncogenic rather than a tumour suppressor role. The malignant breast tissues also showed abnormal cytoplasmic cellular localisation of CTCF, compared to its expression in the normal parenchymal cells. In conclusion, we have demonstrated that MAPH is a potential technique for assessment of genomic imbalances in malignant tissues. Although our results support E-cadherin as the TSG in invasive lobular carcinoma, they argue against the candidacy of E2F-4, CTCF, TRF2, P-cadherin, Ksp-cadherin and VE-cadherin as TSGs in breast cancer.
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Affiliation(s)
- Emad A Rakha
- The Breast Unit, Department of Histopathology, Nottingham City Hospital, University of Nottingham, United Kingdom
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21
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Bai Y, Pontoglio M, Hiesberger T, Sinclair AM, Igarashi P. Regulation of kidney-specific Ksp-cadherin gene promoter by hepatocyte nuclear factor-1beta. Am J Physiol Renal Physiol 2002; 283:F839-51. [PMID: 12217876 DOI: 10.1152/ajprenal.00128.2002] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Kidney-specific cadherin (Ksp-cadherin) is a tissue-specific member of the cadherin family that is expressed exclusively in the kidney and developing genitourinary tract. Recent studies have shown that the proximal 250 bp of the Ksp-cadherin gene promoter are sufficient to direct tissue-specific gene expression in vivo and in vitro. The proximal 120 bp of the promoter are evolutionarily conserved between mouse and human and contain a DNase I hypersensitive site that is kidney cell specific. At position -55, the promoter contains a consensus recognition site for hepatocyte nuclear factor-1 (HNF-1). Mutations of the consensus HNF-1 site and downstream GC-boxes inhibit promoter activity in transfected cells. HNF-1alpha and HNF-1beta bind specifically to the -55 site, and both proteins transactivate the promoter directly. Expression of Ksp-cadherin is not altered in the kidneys of HNF-1alpha-deficient mice. However, expression of a gain-of-function HNF-1beta mutant stimulates Ksp-cadherin promoter activity in transfected cells, whereas expression of a dominant-negative mutant inhibits activity. These studies identify Ksp-cadherin as the first kidney-specific promoter that has been shown to be regulated by HNF-1beta. Mutations of HNF-1beta, as occur in humans with inherited renal cysts and diabetes, may cause dysregulated Ksp-cadherin promoter activity.
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Affiliation(s)
- Yun Bai
- Division of Nephrology, Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, 75390, USA
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22
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Horsfield J, Ramachandran A, Reuter K, LaVallie E, Collins-Racie L, Crosier K, Crosier P. Cadherin-17 is required to maintain pronephric duct integrity during zebrafish development. Mech Dev 2002; 115:15-26. [PMID: 12049763 DOI: 10.1016/s0925-4773(02)00094-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We have isolated a zebrafish cadherin that is orthologous to human LI-cadherin (CDH17). Zebrafish cdh17 is expressed exclusively in the pronephric ducts during embryogenesis, and in the mesonephros during larval development and adulthood. Like its mammalian ortholog, cdh17 is also expressed in liver and intestine in adult zebrafish. We show that cdh17-positive mesodermal cells do not contribute to the hematopoietic system. Consistent with a cell adhesion role for Cdh17, depletion of Cdh17 function using antisense morpholino oligonucleotides compromised cell cohesion during pronephric duct formation. Our results indicate that Cdh17 is necessary for maintaining the integrity of the pronephric ducts during zebrafish embryogenesis. This finding contrasts with the role of mammalian CDH17, which does not appear to be involved in nephric development.
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Affiliation(s)
- Julia Horsfield
- Department of Molecular Medicine & Pathology, The University of Auckland, Auckland, New Zealand
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23
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Chalmers IJ, Aubele M, Hartmann E, Braungart E, Werner M, Höfler H, Atkinson MJ. Mapping the chromosome 16 cadherin gene cluster to a minimal deleted region in ductal breast cancer. CANCER GENETICS AND CYTOGENETICS 2001; 126:39-44. [PMID: 11343777 DOI: 10.1016/s0165-4608(00)00376-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The cadherin family of cell adhesion molecules has been implicated in tumor metastasis and progression. Eight family members have been mapped to the long arm of chromosome 16. Using radiation hybrid mapping, we have located six of these genes within a cluster at 16q21-q22.1. In invasive lobular carcinoma of the breast frequent LOH and accompanying mutation affect the CDH1 gene, which is a member of this chromosome 16 gene cluster. CDH1 LOH also occurs in invasive ductal carcinoma, but in the absence of gene mutation. The proximity of other cadherin genes to 16q22.1 suggests that they may be affected by LOH in invasive ductal carcinomas. Using the mapping data, microsatellite markers were selected which span regions of chromosome 16 containing the cadherin genes. In breast cancer tissues, a high rate of allelic loss was found over the gene cluster region, with CDH1 being the most frequently lost marker. In invasive ductal carcinoma a minimal deleted region was identified within part of the chromosome 16 cadherin gene cluster. This provides strong evidence for the existence of a second 16q22 suppressor gene locus within the cadherin cluster.
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Affiliation(s)
- I J Chalmers
- Institut für Pathologie, GSF-Forschungszentrum für Umwelt und Gesundheit, Ingolstaedter Landstrasse 1, D-85764, Neuherberg, Germany.
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24
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Abstract
The central nervous system (CNS) is divided into diverse embryological and functional compartments. The early embryonic CNS consists of a series of transverse subdivisions (neuromeres) and longitudinal domains. These embryonic subdivisions represent histogenetic fields in which neurons are born and aggregate in distinct cell groups (brain nuclei and layers). Different subsets of these aggregates become selectively connected by nerve fiber tracts and, finally, by synapses, thus forming the neural circuits of the functional systems in the CNS. Recent work has shown that 30 or more members of the cadherin family of morphoregulatory molecules are differentially expressed in the developing and mature brain at almost all stages of development. In a regionally specific fashion, most cadherins studied to date are expressed by the embryonic subdivisions of the early embryonic brain, by developing brain nuclei, cortical layers and regions, and by fiber tracts, neural circuits and synapses. Each cadherin shows a unique expression pattern that is distinct from that of other cadherins. Experimental evidence suggests that cadherins contribute to CNS regionalization, morphogenesis and fiber tract formation, possibly by conferring preferentially homotypic adhesiveness (or other types of interactions) between the diverse structural elements of the CNS. Cadherin-mediated adhesive specificity may thus provide a molecular code for early embryonic CNS regionalization as well as for the development and maintenance of functional structures in the CNS, from embryonic subdivisions to brain nuclei, cortical layers and neural circuits, down to the level of individual synapses.
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Affiliation(s)
- C Redies
- Institute of Anatomy, University of Essen Medical School, Hufelandstrasse 55, Germany.
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25
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Nollet F, Kools P, van Roy F. Phylogenetic analysis of the cadherin superfamily allows identification of six major subfamilies besides several solitary members. J Mol Biol 2000; 299:551-72. [PMID: 10835267 DOI: 10.1006/jmbi.2000.3777] [Citation(s) in RCA: 541] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Cadherins play an important role in specific cell-cell adhesion events. Their expression appears to be tightly regulated during development and each tissue or cell type shows a characteristic pattern of cadherin molecules. Inappropriate regulation of their expression levels or functionality has been observed in human malignancies, in many cases leading to aggravated cancer cell invasion and metastasis. The cadherins form a superfamily with at least six subfamilies, which can be distinguished on the basis of protein domain composition, genomic structure, and phylogenetic analysis of the protein sequences. These subfamilies comprise classical or type-I cadherins, atypical or type-II cadherins, desmocollins, desmogleins, protocadherins and Flamingo cadherins. In addition, several cadherins clearly occupy isolated positions in the cadherin superfamily (cadherin-13, -15, -16, -17, Dachsous, RET, FAT, MEGF1 and most invertebrate cadherins). We suggest a different evolutionary origin of the protocadherin and Flamingo cadherin genes versus the genes encoding desmogleins, desmocollins, classical cadherins, and atypical cadherins. The present phylogenetic analysis may accelerate the functional investigation of the whole cadherin superfamily by allowing focused research of prototype cadherins within each subfamily.
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Affiliation(s)
- F Nollet
- Molecular Cell Biology Unit, Department of Molecular Biology, Flanders Interuniversity Institute for Biotechnology, Ledeganckstraat 35, Ghent, B-9000, Belgium
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26
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Wu Q, Maniatis T. Large exons encoding multiple ectodomains are a characteristic feature of protocadherin genes. Proc Natl Acad Sci U S A 2000; 97:3124-9. [PMID: 10716726 PMCID: PMC16203 DOI: 10.1073/pnas.97.7.3124] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Recent studies revealed a striking difference in the genomic organization of classic cadherin genes and one family of "nonclassic cadherin" genes designated protocadherins. Specifically, the DNA sequences encoding the ectodomain repeats of classic cadherins are interrupted by multiple introns. By contrast, all of the encoded ectodomains of each member of the protocadherin gene clusters are present in one large exon. To determine whether large ectodomain exons are a general feature of protocadherin genes we have investigated the genomic organization of several additional human protocadherin genes by using DNA sequence information in GenBank. These genes include protocadherin 12 (Pcdh12), an ortholog of the mouse vascular endothelial cadherin-2 gene; hFmi1 and hFmi2, homologs of the Drosophila planar cell polarity gene, flamingo; hFat2, a homolog of the Drosophila tumor suppressor gene fat; and the Drosophila DN-cadherin and DE-cadherin genes. Each of these genes was found to be a member of the protocadherin subfamily, based on amino acid sequence comparisons of their ectodomains. Remarkably, all of these protocadherin genes share a common feature: most of the genomic DNA sequences encoding their ectodomains are not interrupted by an intron. We conclude that the presence of unusually large exons is a characteristic feature of protocadherin genes.
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Affiliation(s)
- Q Wu
- Department of Molecular and Cellular Biology, Harvard University, 7 Divinity Avenue, Cambridge, MA 02138, USA
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27
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Large exons encoding multiple ectodomains are a characteristic feature of protocadherin genes. Proc Natl Acad Sci U S A 2000. [PMID: 10716726 PMCID: PMC16203 DOI: 10.1073/pnas.060027397] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recent studies revealed a striking difference in the genomic organization of classic cadherin genes and one family of "nonclassic cadherin" genes designated protocadherins. Specifically, the DNA sequences encoding the ectodomain repeats of classic cadherins are interrupted by multiple introns. By contrast, all of the encoded ectodomains of each member of the protocadherin gene clusters are present in one large exon. To determine whether large ectodomain exons are a general feature of protocadherin genes we have investigated the genomic organization of several additional human protocadherin genes by using DNA sequence information in GenBank. These genes include protocadherin 12 (Pcdh12), an ortholog of the mouse vascular endothelial cadherin-2 gene; hFmi1 and hFmi2, homologs of the Drosophila planar cell polarity gene, flamingo; hFat2, a homolog of the Drosophila tumor suppressor gene fat; and the Drosophila DN-cadherin and DE-cadherin genes. Each of these genes was found to be a member of the protocadherin subfamily, based on amino acid sequence comparisons of their ectodomains. Remarkably, all of these protocadherin genes share a common feature: most of the genomic DNA sequences encoding their ectodomains are not interrupted by an intron. We conclude that the presence of unusually large exons is a characteristic feature of protocadherin genes.
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28
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Whyte DA, Li C, Thomson RB, Nix SL, Zanjani R, Karp SL, Aronson PS, Igarashi P. Ksp-cadherin gene promoter. I. Characterization and renal epithelial cell-specific activity. THE AMERICAN JOURNAL OF PHYSIOLOGY 1999; 277:F587-98. [PMID: 10516284 DOI: 10.1152/ajprenal.1999.277.4.f587] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Kidney-specific cadherin (Ksp-cadherin, cadherin 16) is a novel, kidney-specific member of the cadherin superfamily that is expressed exclusively in the basolateral membrane of renal tubular epithelial cells. To characterize the Ksp-cadherin gene promoter, a lambda bacteriophage clone containing 3.7 kb of the proximal 5' flanking region of the mouse Ksp-cadherin gene was isolated. The transcription initiation site was mapped by RNase protection assays and 5' rapid amplification of cDNA ends, and a 709-bp intron was identified within the 5' untranslated region. The proximal 5' flanking region was "TATA-less" but contained other consensus promoter elements including an initiator (Inr), GC boxes, and a CAAT box. Potential binding sites were identified for transcription factors that are involved in tissue-specific gene expression including activator protein-2 (AP-2), hepatocyte nuclear factor-3 (HNF-3), basic helix-loop-helix (bHLH) proteins, CCAAT/enhancer-binding protein (C/EBP), and GATA factors. Transfection of luciferase reporter plasmids containing 2.6 kb of the 5' flanking region markedly increased luciferase activity in renal epithelial cells (MDCK and mIMCD-3) but not in mesenchymal cells (NIH 3T3 and MMR1). Deletion analysis identified an 82-bp region from -31 to -113 that was essential for promoter activity in transfected renal epithelial cells. Electrophoretic mobility-shift assays showed that mIMCD-3 cells contain nuclear proteins that bind to this region of the promoter. Mutational analysis showed that sequences within the HNF-3 consensus site and CAAT box were involved in protein binding and promoter activity. We conclude that the proximal 5' flanking region of the mouse Ksp-cadherin gene contains an orientation-dependent promoter that is kidney epithelial cell specific. The region of the promoter from -113 to -31 is required for transcriptional activity and contains binding sites for nuclear proteins that are specifically expressed in renal epithelial cells.
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Affiliation(s)
- D A Whyte
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut 06520, USA
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Igarashi P, Shashikant CS, Thomson RB, Whyte DA, Liu-Chen S, Ruddle FH, Aronson PS. Ksp-cadherin gene promoter. II. Kidney-specific activity in transgenic mice. THE AMERICAN JOURNAL OF PHYSIOLOGY 1999; 277:F599-610. [PMID: 10516285 DOI: 10.1152/ajprenal.1999.277.4.f599] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Kidney-specific cadherin (Ksp-cadherin, cadherin 16) is a tissue-specific member of the cadherin superfamily that is expressed exclusively in the basolateral membrane of tubular epithelial cells in the kidney. To determine the basis for tissue-specific expression of Ksp-cadherin in vivo, we evaluated the activity of the promoter in transgenic mice. Transgenic mice containing 3.3 kb of the mouse Ksp-cadherin promoter and an Escherichia coli lacZ reporter gene were generated by pronuclear microinjection. Assays of beta-galactosidase enzyme activity showed that the transgene was expressed exclusively in the kidney in both adult and developing mice. Within the kidney, the transgene was expressed in a subset of renal tubular epithelial cells that endogenously expressed Ksp-cadherin and that were identified as collecting ducts by colabeling with Dolichos biflorus agglutinin. In the developing metanephros, expression of the transgene in the branching ureteric bud correlated with the developmental expression of Ksp-cadherin. Identical patterns of expression were observed in multiple founder mice, indicating that kidney specificity was independent of transgene integration site. However, heterocellular expression was observed consistent with repeat-induced gene silencing. We conclude that the Ksp-cadherin gene promoter directs kidney-specific expression in vivo. Regulatory elements that are sufficient to recapitulate the tissue- and differentiation-specific expression of Ksp-cadherin in the renal collecting duct are located within 3.3 kb upstream to the transcriptional start site.
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Affiliation(s)
- P Igarashi
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
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Wertz K, Herrmann BG. Kidney-specific cadherin (cdh16) is expressed in embryonic kidney, lung, and sex ducts. Mech Dev 1999; 84:185-8. [PMID: 10473139 DOI: 10.1016/s0925-4773(99)00074-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Cdh16 was initially described as a truncated cadherin expressed in the adult rabbit kidney. We have analyzed the expression pattern of cdh-16 during mouse embryogenesis, and show that cdh-16 transcripts are present in ureter-derived epithelia of the metanephric kidney. In addition, we demonstrate that cdh-16 is also transiently expressed in the epithelia of embryonic sex ducts and the lung of the embryo.
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Affiliation(s)
- K Wertz
- Max-Planck-Institut für Immunbiologie, Freiburg, Germany
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Chalmers IJ, Höfler H, Atkinson MJ. Mapping of a cadherin gene cluster to a region of chromosome 5 subject to frequent allelic loss in carcinoma. Genomics 1999; 57:160-3. [PMID: 10191097 DOI: 10.1006/geno.1998.5717] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cadherin adhesion molecules define cellular interactions during embryogenesis and morphogenesis, while later in life they are responsible for maintaining tissue integrity. Mutation and loss of expression of cadherins have been implicated in the progression of some malignant tumors, suggesting that cadherins may also act as tumor/metastasis suppressor genes. To determine the extent to which cadherin loci could be affected by allelic losses, we used radiation hybrid mapping to define the chromosomal position of five cadherin genes. A cadherin gene cluster consisting of three genes was identified on the short arm of chromosome 5. This region of the genome is subjected to frequent allelic loss in malignant disease.
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Affiliation(s)
- I J Chalmers
- Institut für Pathologie, GSF-Forschungszentrum für Umwelt und Gesundheit, Neuherberg, Germany.
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