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Kruppa D, Peters F, Bornert O, Maler MD, Martin SF, Becker-Pauly C, Nyström A. Distinct contributions of meprins to skin regeneration after injury - Meprin α a physiological processer of pro-collagen VII. Matrix Biol Plus 2021; 11:100065. [PMID: 34435182 PMCID: PMC8377016 DOI: 10.1016/j.mbplus.2021.100065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/12/2021] [Revised: 04/28/2021] [Accepted: 05/03/2021] [Indexed: 02/07/2023] Open
Abstract
Meprins subtly support epidermal and dermal skin wound healing. Loss of both meprins reduces re-epithelialization and wound macrophage abundance. Meprin α is a physiological maturing proteinase of collagen VII. Meprins are reduced in recessive dystrophic epidermolysis bullosa skin.
Astacin-like proteinases (ALPs) are regulators of tissue and extracellular matrix (ECM) homeostasis. They convey this property through their ability to convert ECM protein pro-forms to functional mature proteins and by regulating the bioavailability of growth factors that stimulate ECM synthesis. The most studied ALPs in this context are the BMP-1/tolloid-like proteinases. The other subclass of ALPs in vertebrates – the meprins, comprised of meprin α and meprin β – are emerging as regulators of tissue and ECM homeostasis but have so far been only limitedly investigated. Here, we functionally assessed the roles of meprins in skin wound healing using mice genetically deficient in one or both meprins. Meprin deficiency did not change the course of macroscopic wound closure. However, subtle but distinct contributions of meprins to the healing process and dermal homeostasis were observed. Loss of both meprins delayed re-epithelialization and reduced macrophage infiltration. Abnormal dermal healing and ECM regeneration was observed in meprin deficient wounds. Our analyses also revealed meprin α as one proteinase responsible for maturation of pro-collagen VII to anchoring fibril-forming-competent collagen VII in vivo. Collectively, our study identifies meprins as subtle players in skin wound healing.
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Key Words
- ALP, astacin-like proteinase
- BSA, bovine serum albumine
- BTP, BMP-1/tolloid-like proteinase
- DAPI, 4′-,6-diamidino-2-phenylindole
- DEJ, dermal epidermal junction
- DMEM, Dulbecco’s modified Eagle’s medium
- Dystrophic epidermolysis bullosa
- ECM, extracellular matrix
- Extracellular matrix
- FA, formic acid
- FBS, fetal bovine serum
- Fibrosis
- Inflammation
- NC, non-collagenous
- PBS, phosphate-buffered saline
- TBS, tris-buffered saline
- WT, wild type
- Wound healing
- qPCR, quantitative polymerase chain reaction
- αSMA, α-smooth muscle actin
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Affiliation(s)
- Daniel Kruppa
- Department of Dermatology, Faculty of Medicine and Medical Center - University of Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Florian Peters
- Biochemical Institute, Christian-Albrechts-University Kiel, Germany.,Laboratory for Retinal Cell Biology, Department of Ophthalmology, University Hospital Zurich, University of Schlieren / Zurich, Schlieren, Zurich, Switzerland
| | - Olivier Bornert
- Department of Dermatology, Faculty of Medicine and Medical Center - University of Freiburg, Germany
| | - Mareike D Maler
- Department of Dermatology, Faculty of Medicine and Medical Center - University of Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Stefan F Martin
- Department of Dermatology, Faculty of Medicine and Medical Center - University of Freiburg, Germany
| | | | - Alexander Nyström
- Department of Dermatology, Faculty of Medicine and Medical Center - University of Freiburg, Germany
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Truong M, Lennartsson F, Bibic A, Sundius L, Persson A, Siemund R, In’t Zandt R, Goncalves I, Wassélius J. Classifications of atherosclerotic plaque components with T1 and T2* mapping in 11.7 T MRI. Eur J Radiol Open 2021; 8:100323. [PMID: 33532518 PMCID: PMC7822939 DOI: 10.1016/j.ejro.2021.100323] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND AIMS Histopathology is the gold standard for analysis of atherosclerotic plaques but has drawbacks due to the destructive nature of the method. Ex vivo MRI is a non-destructive method to image whole plaques. Our aim was to use quantitative high field ex vivo MRI to classify plaque components, with histology as gold standard. METHODS Surgically resected carotid plaques from 12 patients with recent TIA or stroke were imaged at 11.7 T MRI. Quantitative T1/T2* mapping sequences and qualitative T1/T2* gradient echo sequences with voxel size of 30 × 30 × 60 μm3 were obtained prior to histological preparation, sectioning and staining for lipids, inflammation, hemorrhage, and fibrous tissue. Regions of interest (ROI) were selected based on the histological staining at multiple levels matched between histology and MRI. The MRI parameters of each ROI were then analyzed with quadratic discriminant analysis (QDA) for classification. RESULTS A total of 965 ROIs, at 70 levels matched between histology and MRI, were registered based on histological staining. In the nine plaques where three or more plaque components were possible to co-localize with MRI, the mean degree of misclassification by QDA was 16.5 %. One of the plaques contained mostly fibrous tissue and lipids and had no misclassifications, and two plaques mostly contained fibrous tissue. QDA generally showed good classification for fibrous tissue and lipids, whereas plaques with hemorrhage and inflammation had more misclassifications. CONCLUSION 11.7 T ex vivo high field MRI shows good visual agreement with histology in carotid plaques. T1/T2* maps analyzed with QDA is a promising non-destructive method to classify plaque components, but with a higher degree of misclassifications in plaques with hemorrhage or inflammation.
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Key Words
- 11.7 T MRI
- 11.7T, 11.7 Tesla
- 3T, 3 Tesla
- Atherosclerosis
- BSA, bovine serum albumin
- CI, confidence interval
- CTA, computed tomography angiography
- Carotid plaque
- Classification
- FA, flip angle
- FOV, field of view
- GE3D, gradient echo three dimensional
- HRP, horse radish peroxidase
- ICA, internal carotid artery
- IPH, intra-plaque hemorrhage
- LRNC, lipid rich necrotic core
- MRI, magnetic resonance imaging
- OCT, optimal cutting temperature
- Plaque components
- RF, radio frequency
- ROI, region of interest
- SD, standard deviation
- T1 maps
- T1w, T1 weighted
- T2*maps
- T2*w, T2 star weighted
- TBS, tris-buffered saline
- TE, echo time
- TIA, transient ischemic attack
- TR, repetition time
- ms, millisecond
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Affiliation(s)
- My Truong
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - Finn Lennartsson
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - Adnan Bibic
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, F. M. Kirby Center, 707 North Broadway, Baltimore, MD, 21 205, USA
| | - Lena Sundius
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Ana Persson
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Roger Siemund
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - René In’t Zandt
- Lund University Bioimaging Centre, Lund University, Klinikgatan 32, BMC D11, SE-221 84, Lund, Sweden
| | - Isabel Goncalves
- Cardiology, Skåne University Hospital, Sweden
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Johan Wassélius
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
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Toldo S, Austin D, Mauro AG, Mezzaroma E, Van Tassell BW, Marchetti C, Carbone S, Mogelsvang S, Gelber C, Abbate A. Low-Density Lipoprotein Receptor-Related Protein-1 Is a Therapeutic Target in Acute Myocardial Infarction. JACC Basic Transl Sci 2017; 2:561-574. [PMID: 30062170 PMCID: PMC6058925 DOI: 10.1016/j.jacbts.2017.05.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 05/11/2017] [Accepted: 05/15/2017] [Indexed: 01/29/2023]
Abstract
Low-density lipoprotein receptor-related protein-1 (LRP1) is a ubiquitous membrane receptor functioning as a scavenger and regulatory receptor, inducing anti-inflammatory and prosurvival signals. Based on the known structure-activity of the LRP1 receptor binding site, the authors synthesized a small peptide (SP16). SP16 induced a >50% reduction in infarct size (p < 0.001) and preservation of left ventricular systolic function (p < 0.001), and treatment with an LRP1 blocking antibody eliminated the protective effects of SP16. In conclusion, LRP1 activation with SP16 given within 30 min of reperfusion during experimental acute myocardial infarction leads to a cardioprotective signal reducing infarct size and preservation of cardiac systolic function.
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Key Words
- A2MG, alpha-2 macroglobulin
- AAT, alpha-1 antitrypsin
- AMI, acute myocardial infarction
- ATIII, antithrombin III
- HRP, horseradish peroxidase
- IL, interleukin
- IV, intravenous
- LPS, lipopolysaccharide
- LRP1, low-density lipoprotein receptor–related protein-1
- LV, left ventricular
- LVFS, left ventricular fractional shortening
- PBS, phosphate-buffered saline
- SEC, serine protease inhibitor–enzyme complex
- SERPIN, serine protease inhibitor
- SERPINs
- TBS, tris-buffered saline
- TUNEL, terminal deoxynucleotidyl transferase dUTP nick end labeling
- ischemia reperfusion
- low-density lipoprotein receptor-related protein-1
- serine protease inhibitor
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Affiliation(s)
- Stefano Toldo
- Division of Cardiology, VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
| | | | - Adolfo G. Mauro
- Division of Cardiology, VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
| | - Eleonora Mezzaroma
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
- Department of Pharmacotherapy and Outcome Sciences, School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia
| | - Benjamin W. Van Tassell
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
- Department of Pharmacotherapy and Outcome Sciences, School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia
| | - Carlo Marchetti
- Division of Cardiology, VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
| | - Salvatore Carbone
- Division of Cardiology, VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
| | | | | | - Antonio Abbate
- Division of Cardiology, VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
- Johnson Research Center for Critical Care, Virginia Commonwealth University, Richmond, Virginia
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Sanjurjo L, Amézaga N, Aran G, Naranjo-Gómez M, Arias L, Armengol C, Borràs FE, Sarrias MR. The human CD5L/AIM-CD36 axis: A novel autophagy inducer in macrophages that modulates inflammatory responses. Autophagy 2016; 11:487-502. [PMID: 25713983 PMCID: PMC4502645 DOI: 10.1080/15548627.2015.1017183] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
CD5L (CD5 molecule-like) is a secreted glycoprotein that participates in host response to bacterial infection. CD5L influences the monocyte inflammatory response to the bacterial surface molecules lipopolysaccharide (LPS) and lipoteichoic acid (LTA) by inhibiting TNF secretion. Here we studied the intracellular events that lead to macrophage TNF inhibition by human CD5L. To accomplish this goal, we performed functional analyses with human monocytic THP1 macrophages, as well as with peripheral blood monocytes. Inhibition of phosphatidylinositol 3-kinase (PtdIns3K) reversed the inhibitory effect of CD5L on TNF secretion. Among the various PtdIns3K isoforms, our results indicated that CD5L activates PtdIns3K (whose catalytic subunit is termed PIK3C3), a key modulator involved in autophagy. Further analysis revealed a concomitant enhancement of autophagy markers such as cellular LC3-II content, increased LC3 puncta, as well as LC3-LysoTracker Red colocalization. Moreover, electron microscopy showed an increased presence of cytosolic autophagosomes in THP1 macrophages overexpressing CD5L. Besides preventing TNF secretion, CD5L also inhibited IL1B and enhanced IL10 secretion. This macrophage anti-inflammatory pattern of CD5L was reverted upon silencing of autophagy protein ATG7 by siRNA transfection. Additional siRNA experiments in THP1 macrophages indicated that the induction of autophagy mechanisms by CD5L was achieved through cell-surface scavenger receptor CD36, a multiligand receptor expressed in a wide variety of cell types. Our data represent the first evidence that CD36 is involved in autophagy and point to a significant contribution of the CD5L-CD36 axis to the induction of macrophage autophagy.
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Key Words
- 3-MA, 3-methyladenine
- AIM
- AKT, v-akt murine thymoma viral oncogene homolog
- ALB, albumin
- ATG7, autophagy-related 7
- CD, cluster of differentiation
- CD36
- CD5L
- CD5L, CD5 molecule-like
- FCS, fetal calf serum
- FSL1, pam2CGDPKHPKSF
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- IL, interleukin
- LPS, lipopolysaccharide
- LTA, lipoteichoic acid
- MAP1LC3A/B (LC3), microtubule-associated protein 1 light chain 3 α/β
- MAPK, mitogen-activated protein kinase
- MФ, macrophages
- NFKB, nuclear factor of kappa light polypeptide gene enhancer in B-cells
- PB monocytes, peripheral blood monocytes
- PBS, phosphate-buffered saline
- PI3K, phosphoinositide 3-kinase
- PIK3C3, phosphatidylinositol 3-kinase, catalytic subunit type 3
- PMA, phorbol 12-myristate 13-acetate
- Pam3CSK4 (N-palmitoyl-S-[2, 3-bis(palmitoyloxy)-(2RS)-propyl]-(R)-cysteinyl-(S)-seryl-(S)-lysyl-(S)-lysyl-(S)-lysyl-(S)-lysine (Pam3CysSer[Lys]4)
- PtdIns3K, phosphatidylinositol 3-kinase
- PtdIns3P, phosphatidylinositol 3-phosphate
- RELA, v-rel avian reticuloendotheliosis viral oncogene homolog A
- SRCR, scavenger receptor cysteine-rich
- TBS, tris-buffered saline
- TLRs, toll-like receptors
- TNF, tumor necrosis factor
- moAb, monoclonal antibody
- monocyte/macrophage
- oxLDL, oxidized low-density lipoprotein
- poAb, polyclonal antibody
- r-HsCD5L, recombinant human (Homo sapiens) CD5L
- siRNA, short interference RNA
- toll-like receptor
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Affiliation(s)
- Lucía Sanjurjo
- a Innate Immunity Group ; Health Sciences Research Institute Germans Trias i Pujol (IGTP) ; Badalona , Spain
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Ulbricht A, Gehlert S, Leciejewski B, Schiffer T, Bloch W, Höhfeld J. Induction and adaptation of chaperone-assisted selective autophagy CASA in response to resistance exercise in human skeletal muscle. Autophagy 2016; 11:538-46. [PMID: 25714469 PMCID: PMC4502687 DOI: 10.1080/15548627.2015.1017186] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [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] [Indexed: 12/12/2022] Open
Abstract
Chaperone-assisted selective autophagy (CASA) is a tension-induced degradation pathway essential for muscle maintenance. Impairment of CASA causes childhood muscle dystrophy and cardiomyopathy. However, the importance of CASA for muscle function in healthy individuals has remained elusive so far. Here we describe the impact of strength training on CASA in a group of healthy and moderately trained men. We show that strenuous resistance exercise causes an acute induction of CASA in affected muscles to degrade mechanically damaged cytoskeleton proteins. Moreover, repeated resistance exercise during 4 wk of training led to an increased expression of CASA components. In human skeletal muscle, CASA apparently acts as a central adaptation mechanism that responds to acute physical exercise and to repeated mechanical stimulation.
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Affiliation(s)
- Anna Ulbricht
- a Institute for Cell Biology; Rheinische Friedrich-Wilhelms-University Bonn ; Bonn , Germany
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Abstract
Variations of post-translational modifications are important for stability and in vivo behavior of therapeutic antibodies. A recombinant humanized anti-cocaine monoclonal antibody (h2E2) was characterized for heterogeneity of N-linked glycosylation and disulfide bonds. In addition, charge heterogeneity, which is partially due to the presence or absence of C-terminal lysine on the heavy chains, was examined. For cocaine overdose therapy, Fab fragments may be therapeutic, and thus, a simplified method of generation, purification, and characterization of the Fab fragment generated by Endoproteinase Lys-C digestion was devised. Both the intact h2E2 antibody and purified Fab fragments were analyzed for their affinities for cocaine and 2 of its metabolites, benzoylecgonine and cocaethylene, by fluorescence quenching of intrinsic antibody tyrosine and tryptophan fluorescence resulting from binding of these drugs. Binding constants obtained from fluorescence quenching measurements are in agreement with recently published radioligand and ELISA binding assays. The dissociation constants determined for the h2E2 monoclonal and its Fab fragment are approximately 1, 5, and 20 nM for cocaethylene, cocaine, and benzoylecgonine, respectively. Tryptophan fluorescence quenching (emission at 330 nm) was measured after either excitation of tyrosine and tryptophan (280 nm) or selective excitation of tryptophan alone (295 nm). More accurate binding constants are obtained using tryptophan selective excitation at 295 nm, likely due to interfering absorption of cocaine and metabolites at 280 nm. These quenching results are consistent with multiple tryptophan and tyrosine residues in or near the predicted binding location of cocaine in a previously published 3-D model of this antibody's variable region.
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Key Words
- ABD-F, 7-fluorobenz-2-oxa-1, 3-diazole-4-sulfonamide
- ADCC, antibody-dependent cell mediated cytotoxicity
- BE, benzoylecgonine
- CDR, complementarity determining regions
- CE, cocaethylene
- CHO, Chinese hamster ovary
- ELISA, enzyme-linked immunosorbent assay
- Endo H, endoglycosidase H
- Endo Lys-C, lysyl endoproteinase
- Fab fragment
- Fab, fragment
- Fc, fragment, crystallizable
- HPLC, high performance liquid chromatography
- IEF, isoelectric focusing
- KD, dissociation constant
- MES, 2-(N-morpholino)ethanesulfonic acid
- MOPS, 3-(N-morpholino)propanesulfonic acid
- NEPHGE, non-equilibrium pH gel electrophoresis
- PNGase-F, peptide N-glycosidase F
- SCX, strong cation exchange
- TBP, tributylphosphine
- TBS, tris-buffered saline
- antigen-binding
- cocaine
- fluorescence quenching, heterogeneity
- h2E2, humanized monoclonal antibody against cocaine
- high performance ion exchange chromatography
- ligand binding
- mAb, monoclonal antibody
- monoclonal antibody
- non-equilibrium pH gel electrophoresis
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Affiliation(s)
- Terence L Kirley
- a Department of Pharmacology and Cell Biophysics ; College of Medicine ; University of Cincinnati ; Cincinnati , OH USA
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Kumar G, Tajpara P, Bukhari AB, Ramchandani AG, De A, Maru GB. Dietary curcumin post-treatment enhances the disappearance of B(a)P-derived DNA adducts in mouse liver and lungs. Toxicol Rep 2014; 1:1181-1194. [PMID: 28962328 PMCID: PMC5598465 DOI: 10.1016/j.toxrep.2014.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 10/27/2014] [Revised: 11/07/2014] [Accepted: 11/07/2014] [Indexed: 01/04/2023] Open
Abstract
Effects of dietary curcumin on disappearance of DNA adducts were studied. Curcumin post-treatment enhanced the disappearance of BPDE-DNA adducts in liver/lungs. Curcumin post-treatment augmented B(a)P-induced apoptosis during 24–120 h. Curcumin post-treatment increased PCNA in B(a)P-treated tissues during 7–28 days. Curcumin-mediated increase in apoptosis and cell proliferation decreased DNA adducts.
To study the post-treatment effects of dietary curcumin on the levels of benzo(a)pyrene [B(a)P]-induced DNA adducts, mice were administered oil or B(a)P and randomized into 7 subgroups after 24 h. One of the subgroups from both the oil and B(a)P groups was killed at 24 h while the remaining 6 subgroups were shifted to powdered control or 0.05% curcumin diet and killed after 24, 72 and 120 h (experiment 1), and 7, 14, and 28 days (experiment 2). Quantitative comparisons of BPDE-DNA nuclear adducts (area and intensity) in immunohistochemically stained lungs and liver sections was carried out by IHC profiler. A time-dependent decrease in the levels of adducts in B(a)P-treated animals was further enhanced by curcumin exposure compared to the levels in time-matched controls. To assess the contribution of apoptosis and cell proliferation in observed curcumin-mediated enhanced decrease of BPDE-DNA adducts, comparative evaluation of apoptosis and cell proliferation markers was undertaken. Results suggested enhancement of B(a)P-induced apoptosis in liver and lungs by curcumin during 24–120 h while no such enhancement was observed at 7–28 days. Results suggest curcumin-mediated enhancement in apoptosis (experiment 1) and adduct dilution (experiment 2) to be the reason for the observed higher decrease of BPDE-DNA adducts.
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Affiliation(s)
- Gaurav Kumar
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
| | - Pooja Tajpara
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
| | - Amirali B Bukhari
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
| | - Asha G Ramchandani
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
| | - Abhijit De
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
| | - Girish B Maru
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, India
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Szalontay L, Schally AV, Popovics P, Vidaurre I, Krishan A, Zarandi M, Cai RZ, Klukovits A, Block NL, Rick FG. Novel GHRH antagonists suppress the growth of human malignant melanoma by restoring nuclear p27 function. Cell Cycle 2014; 13:2790-7. [PMID: 25486366 PMCID: PMC4615138 DOI: 10.4161/15384101.2015.945879] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 05/22/2014] [Revised: 06/13/2014] [Accepted: 06/16/2014] [Indexed: 01/21/2023] Open
Abstract
Malignant melanoma is the deadliest form of skin cancer; the treatment of advanced and recurrent forms remains a challenge. It has recently been reported that growth hormone-releasing hormone (GHRH) receptor is involved in the pathogenesis of melanoma. Therefore, we investigated the effects of our new GHRH antagonists on a human melanoma cancer cell line. Antiproliferative effects of GHRH antagonists, MIA-602, MIA-606 and MIA-690, on the human melanoma cell line, A-375, were studied in vitro using the MTS assay. The effect of MIA-690 (5 μg/day 28 d) was further evaluated in vivo in nude mice bearing xenografts of A-375. Subcellular localization of p27 was detected with Western blot and immunofluorescent staining. MIA-690 inhibited the proliferation of A-375 cells in a dose-dependent manner (33% at 10 μM, and 19.2% at 5 μM, P < 0 .05 vs. control), and suppressed the growth of xenografted tumors by 70.45% (P < 0.05). Flow cytometric analysis of cell cycle effects following the administration of MIA-690 revealed a decrease in the number of cells in G2/M phase (from 19.7% to 12.9%, P < 0.001). Additionally, Western blot and immunofluorescent studies showed that exposure of A-375 cells to MIA-690 triggered the nuclear accumulation of p27. MIA-690 inhibited tumor growth in vitro and in vivo, and increased the translocation of p27 into the nucleus thus inhibiting progression of the cell cycle. Our findings indicate that patients with malignant melanoma could benefit from treatment regimens, which combine existing chemotherapy agents and novel GHRH-antagonists.
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Key Words
- ANOVA, one-way analysis of variance
- Abu, a-aminobutyric acid
- Ac, acetyl
- Ada, 12-aminododecanoyl
- Agm, agmatine
- Amc, 8-aminocaprylyl
- Cpa, parachlorophenylalanine
- FBS, fetal bovine serum
- Fpa5, pentafluoro-phenylalanine
- GH, growth hormone
- GHRH, growth hormone-releasing hormone
- GHRH-R, growth hormone-releasing hormone receptor
- Har, homoarginine
- IGF-I, insulin-like growth factor I
- MTS, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfonphenyl)-2H-tetrazolium
- Nle, norleucine
- Orn, ornithine
- Ph, phenyl
- PhAc, phenylacetyl
- SVs, splice variants
- TBS, tris-buffered saline
- Tyr(Me), O-methyltyrosine
- growth hormone-releasing hormone antagonist
- hGHRH, human growth hormone-releasing hormone
- mTOR, mammalian target of rapamycin
- melanoma
- p27
- pGHRH-R, pituitary type GHRH-receptor
- targeted therapy
- xenografted mouse model
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Affiliation(s)
- Luca Szalontay
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
| | - Andrew V Schally
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
- Divisions of Hematology/Oncology; University of Miami; Miller School of Medicine; Miami, FL USA
- Department of Endocrinology; University of Miami; Miller School of Medicine; Miami, FL USA
- Sylvester Comprehensive Cancer Center; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Petra Popovics
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Cardiovascular Diseases; Department of Medicine; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Irving Vidaurre
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
| | - Awtar Krishan
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Marta Zarandi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Ren-Zhi Cai
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Anna Klukovits
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Norman L Block
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
- Divisions of Hematology/Oncology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Ferenc G Rick
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Urology; Herbert Wertheim College of Medicine; Florida International University; Miami, FL, USA
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