201
|
Thurner L, Fadle N, Regitz E, Kemele M, Klemm P, Zaks M, Stöger E, Bette B, Carbon G, Zimmer V, Assmann G, Murawski N, Kubuschok B, Held G, Preuss KD, Pfreundschuh M. The molecular basis for development of proinflammatory autoantibodies to progranulin. J Autoimmun 2015; 61:17-28. [PMID: 26005049 DOI: 10.1016/j.jaut.2015.05.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 04/27/2015] [Accepted: 05/03/2015] [Indexed: 11/17/2022]
Abstract
Recently we identified in a wide spectrum of autoimmune diseases frequently occurring proinflammatory autoantibodies directed against progranulin, a direct inhibitor of TNFR1 & 2 and of DR3. In the present study we investigated the mechanisms for the breakdown of self-tolerance against progranulin. Isoelectric focusing identified a second, differentially electrically charged progranulin isoform exclusively present in progranulin-antibody-positive patients. Alkaline phosphatase treatment revealed this additional progranulin isoform to be hyperphosphorylated. Subsequently Ser81, which is located within the epitope region of progranulin-antibodies, was identified as hyperphosphorylated serine residue by site directed mutagenesis of candidate phosphorylation sites. Hyperphosphorylated progranulin was detected exclusively in progranulin-antibody-positive patients during the courses of their diseases. The occurrence of hyperphosphorylated progranulin preceded seroconversions of progranulin-antibodies, indicating adaptive immune response. Utilizing panels of kinase and phosphatase inhibitors, PKCβ1 was identified as the relevant kinase and PP1 as the relevant phosphatase for phosphorylation and dephosphorylation of Ser81. In contrast to normal progranulin, hyperphosphorylated progranulin interacted exclusively with inactivated (pThr320) PP1, suggesting inactivated PP1 to cause the detectable occurrence of phosphorylated Ser81 PGRN. Investigation of possible functional alterations of PGRN due to Ser81 phosphorylation revealed, that hyperphosphorylation prevents the interaction and thus direct inhibition of TNFR1, TNFR2 and DR3, representing an additional direct proinflammatory effect. Finally phosphorylation of Ser81 PGRN alters the conversion pattern of PGRN. In conclusion, inactivated PP1 induces hyperphosphorylation of progranulin in a wide spectrum of autoimmune diseases. This hyperphosphorylation prevents direct inhibition of TNFR1, TNFR2 and DR3 by PGRN, alters the conversion of PGRN, and is strongly associated with the occurrence of neutralizing, proinflammatory PGRN-antibodies, indicating immunogenicity of this alternative secondary modification.
Collapse
MESH Headings
- Animals
- Autoantibodies/genetics
- Autoantibodies/immunology
- Autoantibodies/metabolism
- Binding Sites/genetics
- Blotting, Western
- Cell Line
- Cell Line, Tumor
- Flow Cytometry
- HEK293 Cells
- Humans
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/immunology
- Intercellular Signaling Peptides and Proteins/metabolism
- Mutagenesis, Site-Directed
- Phosphorylation
- Progranulins
- Protein Isoforms/genetics
- Protein Isoforms/immunology
- Protein Isoforms/metabolism
- Protein Kinase C beta/genetics
- Protein Kinase C beta/immunology
- Protein Kinase C beta/metabolism
- Protein Precursors/genetics
- Protein Precursors/immunology
- Protein Precursors/metabolism
- Receptors, Tumor Necrosis Factor, Member 25/immunology
- Receptors, Tumor Necrosis Factor, Member 25/metabolism
- Receptors, Tumor Necrosis Factor, Type I/immunology
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Receptors, Tumor Necrosis Factor, Type II/immunology
- Receptors, Tumor Necrosis Factor, Type II/metabolism
- Serine/genetics
- Serine/immunology
- Serine/metabolism
Collapse
Affiliation(s)
- Lorenz Thurner
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany.
| | - Natalie Fadle
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Evi Regitz
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Maria Kemele
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Philipp Klemm
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Marina Zaks
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Elisabeth Stöger
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Birgit Bette
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Gabi Carbon
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Vincent Zimmer
- Department of Internal Medicine II, Saarland University Medical Center, Homburg, Saar, Germany
| | - Gunter Assmann
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Niels Murawski
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Boris Kubuschok
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Gerhard Held
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Klaus-Dieter Preuss
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany
| | - Michael Pfreundschuh
- Saarland University Medical School, José Carreras Center for Immuno- and Gene Therapy, Internal Medicine I, Homburg, Saar, Germany.
| |
Collapse
|
202
|
Progranulin protects against renal ischemia/reperfusion injury in mice. Kidney Int 2015; 87:918-29. [DOI: 10.1038/ki.2014.403] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 10/03/2014] [Accepted: 10/16/2014] [Indexed: 01/12/2023]
|
203
|
Yung MK, Lo KW, Yip CW, Chung GTY, Tong CYK, Cheung PFY, Cheung TT, Poon RTP, So S, Fan ST, Cheung ST. Copy number gain of granulin-epithelin precursor (GEP) at chromosome 17q21 associates with overexpression in human liver cancer. BMC Cancer 2015; 15:264. [PMID: 25885205 PMCID: PMC4403714 DOI: 10.1186/s12885-015-1294-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 03/31/2015] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Granulin-epithelin precursor (GEP), a secretory growth factor, demonstrated overexpression in various human cancers, however, mechanism remain elusive. Primary liver cancer, hepatocellular carcinoma (HCC), ranks the second in cancer-related death globally. GEP controlled growth, invasion, metastasis and chemo-resistance in liver cancer. Noted that GEP gene locates at 17q21 and the region has been frequently reported to be amplified in subset of HCC. The study aims to investigate if copy number gain would associate with GEP overexpression. METHODS Quantitative Microsatellite Analysis (QuMA) was used to quantify the GEP DNA copy number, and fluorescent in situ hybridization (FISH) was performed to consolidate the amplification status. GEP gene copy number, mRNA expression level and clinico-pathological features were analyzed. RESULTS GEP DNA copy number determined by QuMA corroborated well with the FISH data, and the gene copy number correlated with the expression levels (n = 60, r = 0.331, P = 0.010). Gain of GEP copy number was observed in 20% (12/60) HCC and associated with hepatitis B virus infection status (P = 0.015). In HCC with increased GEP copy number, tight association between GEP DNA and mRNA levels were observed (n = 12, r = 0.664, P = 0.019). CONCLUSIONS Gain of the GEP gene copy number was observed in 20% HCC and the frequency comparable to literatures reported on the chromosome region 17q. Increased gene copy number contributed to GEP overexpression in subset of HCC.
Collapse
Affiliation(s)
- Man Kuen Yung
- Department of Surgery, The University of Hong Kong, Hong Kong, China.
| | - Kwok Wai Lo
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, China.
| | - Chi Wai Yip
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Centre for Cancer Research, The University of Hong Kong, Hong Kong, China.
| | - Grace T Y Chung
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, China.
| | - Carol Y K Tong
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, China.
| | - Phyllis F Y Cheung
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Centre for Cancer Research, The University of Hong Kong, Hong Kong, China.
| | - Tan To Cheung
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Department of Surgery, Queen Mary Hospital, Hong Kong, China.
| | - Ronnie T P Poon
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Centre for Cancer Research, The University of Hong Kong, Hong Kong, China. .,State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong, China.
| | - Samuel So
- Department of Surgery, Stanford University, Stanford, USA.
| | - Sheung Tat Fan
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Centre for Cancer Research, The University of Hong Kong, Hong Kong, China. .,State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong, China.
| | - Siu Tim Cheung
- Department of Surgery, The University of Hong Kong, Hong Kong, China. .,Centre for Cancer Research, The University of Hong Kong, Hong Kong, China. .,State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong, China. .,Department of Surgery, The University of Hong Kong, L9-55, Laboratory Block, Faculty of Medicine Building, 21 Sassoon Road, Hong Kong, China.
| |
Collapse
|
204
|
Kanazawa M, Kawamura K, Takahashi T, Miura M, Tanaka Y, Koyama M, Toriyabe M, Igarashi H, Nakada T, Nishihara M, Nishizawa M, Shimohata T. Multiple therapeutic effects of progranulin on experimental acute ischaemic stroke. Brain 2015; 138:1932-48. [PMID: 25838514 DOI: 10.1093/brain/awv079] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 01/27/2015] [Indexed: 12/16/2022] Open
Abstract
In the central nervous system, progranulin, a glycoprotein growth factor, plays a crucial role in maintaining physiological functions, and progranulin gene mutations cause TAR DNA-binding protein-43-positive frontotemporal lobar degeneration. Although several studies have reported that progranulin plays a protective role against ischaemic brain injury, little is known about temporal changes in the expression level, cellular localization, and glycosylation status of progranulin after acute focal cerebral ischaemia. In addition, the precise mechanisms by which progranulin exerts protective effects on ischaemic brain injury remains unknown. Furthermore, the therapeutic potential of progranulin against acute focal cerebral ischaemia, including combination treatment with tissue plasminogen activator, remains to be elucidated. In the present study, we aimed to determine temporal changes in the expression and localization of progranulin after ischaemia as well as the therapeutic effects of progranulin on ischaemic brain injury using in vitro and in vivo models. First, we demonstrated a dynamic change in progranulin expression in ischaemic Sprague-Dawley rats, including increased levels of progranulin expression in microglia within the ischaemic core, and increased levels of progranulin expression in viable neurons as well as induction of progranulin expression in endothelial cells within the ischaemic penumbra. We also demonstrated that the fully glycosylated mature secretory isoform of progranulin (∼88 kDa) decreased, whereas the glycosylated immature isoform of progranulin (58-68 kDa) markedly increased at 24 h and 72 h after reperfusion. In vitro experiments using primary cells from C57BL/6 mice revealed that the glycosylated immature isoform was secreted only from the microglia. Second, we demonstrated that progranulin could protect against acute focal cerebral ischaemia by a variety of mechanisms including attenuation of blood-brain barrier disruption, neuroinflammation suppression, and neuroprotection. We found that progranulin could regulate vascular permeability via vascular endothelial growth factor, suppress neuroinflammation after ischaemia via anti-inflammatory interleukin 10 in the microglia, and render neuroprotection in part by inhibition of cytoplasmic redistribution of TAR DNA-binding protein-43 as demonstrated in progranulin knockout mice (C57BL/6 background). Finally, we demonstrated the therapeutic potential of progranulin against acute focal cerebral ischaemia using a rat autologous thrombo-embolic model with delayed tissue plasminogen activator treatment. Intravenously administered recombinant progranulin reduced cerebral infarct and oedema, suppressed haemorrhagic transformation, and improved motor outcomes (P = 0.007, 0.038, 0.007 and 0.004, respectively). In conclusion, progranulin may be a novel therapeutic target that provides vascular protection, anti-neuroinflammation, and neuroprotection related in part to vascular endothelial growth factor, interleukin 10, and TAR DNA-binding protein-43, respectively.
Collapse
Affiliation(s)
- Masato Kanazawa
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kunio Kawamura
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Tetsuya Takahashi
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Minami Miura
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Yoshinori Tanaka
- 2 Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Misaki Koyama
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Masafumi Toriyabe
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Hironaka Igarashi
- 3 Department of Centre for Integrated Human Brain Science, Brain Research Institute, Niigata University, Niigata, Japan
| | - Tsutomu Nakada
- 3 Department of Centre for Integrated Human Brain Science, Brain Research Institute, Niigata University, Niigata, Japan
| | - Masugi Nishihara
- 2 Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Masatoyo Nishizawa
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Takayoshi Shimohata
- 1 Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| |
Collapse
|
205
|
Fontana F, Siva K, Denti MA. A network of RNA and protein interactions in Fronto Temporal Dementia. Front Mol Neurosci 2015; 8:9. [PMID: 25852467 PMCID: PMC4365750 DOI: 10.3389/fnmol.2015.00009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Accepted: 02/25/2015] [Indexed: 12/12/2022] Open
Abstract
Frontotemporal dementia (FTD) is a neurodegenerative disorder characterized by degeneration of the fronto temporal lobes and abnormal protein inclusions. It exhibits a broad clinicopathological spectrum and has been linked to mutations in seven different genes. We will provide a picture, which connects the products of these genes, albeit diverse in nature and function, in a network. Despite the paucity of information available for some of these genes, we believe that RNA processing and post-transcriptional regulation of gene expression might constitute a common theme in the network. Recent studies have unraveled the role of mutations affecting the functions of RNA binding proteins and regulation of microRNAs. This review will combine all the recent findings on genes involved in the pathogenesis of FTD, highlighting the importance of a common network of interactions in order to study and decipher the heterogeneous clinical manifestations associated with FTD. This approach could be helpful for the research of potential therapeutic strategies.
Collapse
Affiliation(s)
- Francesca Fontana
- Laboratory of RNA Biology and Biotechnology, Centre for Integrative Biology, University of TrentoTrento, Italy
| | - Kavitha Siva
- Laboratory of RNA Biology and Biotechnology, Centre for Integrative Biology, University of TrentoTrento, Italy
| | - Michela A. Denti
- Laboratory of RNA Biology and Biotechnology, Centre for Integrative Biology, University of TrentoTrento, Italy
- CNR, Institute of NeurosciencePadua, Italy
| |
Collapse
|
206
|
Progranulin reduction is associated with increased tau phosphorylation in P301L tau transgenic mice. J Neuropathol Exp Neurol 2015; 74:158-65. [PMID: 25575133 DOI: 10.1097/nen.0000000000000158] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Granulin (GRN) mutations have been identified in familial frontotemporal lobar degeneration patients with ubiquitin pathology. GRN transcript haploinsufficiency is proposed as a disease mechanism that leads to the loss of functional progranulin (PGRN) protein. Thus, these mutations are strongly involved in frontotemporal lobar degeneration pathogenesis. Moreover, recent findings indicate that GRN mutations are associated with other neurodegenerative disorders with tau pathology, including Alzheimer disease and corticobasal degeneration. To investigate the potential influence of a decline in PGRN protein on tau accumulation, P301L tau transgenic mice were interbred with GRN-deficient mice, producing P301L tau transgenic mice harboring the GRN hemizygote. Brains were collected from 13- and 19-month-old mice, and sequential extraction of proteins, immunoblotting, and immunohistochemical analyses were performed. Immunoblotting analysis revealed that tau phosphorylation was accelerated in the Tris-saline soluble fraction of 13-month-old and in the sarkosyl-insoluble fraction of 19-month-old P301L tau/GRN hemizygotes compared with those in fractions from P301L tau transgenic mice. Activity of cyclin-dependent kinases was also upregulated in the brains of P301L tau/GRN hemizygote mice. Although the mechanisms involved in these findings remain unknown, our data suggest that a reduction in PGRN protein might contribute to phosphorylation and intraneuronal accumulation of tau.
Collapse
|
207
|
Zhao YP, Tian QY, Liu B, Cuellar J, Richbourgh B, Jia TH, Liu CJ. Progranulin knockout accelerates intervertebral disc degeneration in aging mice. Sci Rep 2015; 5:9102. [PMID: 25777988 PMCID: PMC4894449 DOI: 10.1038/srep09102] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/10/2015] [Indexed: 12/21/2022] Open
Abstract
Intervertebral disc (IVD) degeneration is a common degenerative disease, yet much is unknown about the mechanisms during its pathogenesis. Herein we investigated whether progranulin (PGRN), a chondroprotective growth factor, is associated with IVD degeneration. PGRN was detectable in both human and murine IVD. The levels of PGRN were upregulated in murine IVD tissue during aging process. Loss of PGRN resulted in an early onset of degenerative changes in the IVD tissue and altered expressions of the degeneration-associated molecules in the mouse IVD tissue. Moreover, PGRN knockout mice exhibited accelerated IVD matrix degeneration, abnormal bone formation and exaggerated bone resorption in vertebra with aging. The acceleration of IVD degeneration observed in PGRN null mice was probably due to the enhanced activation of NF-κB signaling and β-catenin signaling. Taken together, PGRN may play a critical role in homeostasis of IVD, and may serve as a potential molecular target for prevention and treatment of disc degenerative diseases.
Collapse
Affiliation(s)
- Yun-peng Zhao
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
- Department of Spinal Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, PR China
| | - Qing-yun Tian
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
| | - Ben Liu
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
| | - Jason Cuellar
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
| | - Brendon Richbourgh
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
| | - Tang-hong Jia
- Department of Orthopaedic Surgery, Jinan Central Hospital, Shandong University, Jinan, Shandong 250012, PR China
| | - Chuan-ju Liu
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY. 10003
- Department of Cell Biology, New York University School of Medicine, New York, NY 10016
| |
Collapse
|
208
|
Tanaka A, Tsukamoto H, Mitoma H, Kiyohara C, Ueda N, Ayano M, Ohta SI, Kimoto Y, Akahoshi M, Arinobu Y, Niiro H, Tada Y, Horiuchi T, Akashi K. Serum progranulin levels are elevated in dermatomyositis patients with acute interstitial lung disease, predicting prognosis. Arthritis Res Ther 2015; 17:27. [PMID: 25888887 PMCID: PMC4354987 DOI: 10.1186/s13075-015-0547-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 01/27/2015] [Indexed: 11/22/2022] Open
Abstract
Introduction Progranulin (PGRN), a pleiotropic growth factor, has emerged as an immunoregulatory molecule. Because the roles of PGRN in dermatomyositis (DM) are still unknown, we investigated whether serum PGRN levels are associated with disease activity and prognosis in DM patients, particularly in those with DM complicated with interstitial lung disease (ILD). Methods The serum levels of PGRN were measured by enzyme-linked immunosorbent assay in patients with DM (n =57; acute/subacute interstitial pneumonia (A/SIP): n =17, chronic interstitial pneumonia (CIP): n =24, without ILD: n =16), polymyositis (PM, n =21; including 6 with ILD) and normal healthy controls (NHCs, n =60). We assessed the correlation between the serum PGRN levels and the activity indexes of ILD or prognosis in DM patients with ILD. Results Serum PGRN levels were significantly higher in DM patients than in PM patients (P =0.0025) and in NHCs (P <0.0001). In DM patients, the levels were significantly higher in patients with A/SIP than in those with CIP (P <0.0001) or without ILD (P =0.0003). The serum PGRN levels in DM patients with ILD significantly correlated with serum ferritin (rS =0.77, P <0.0001), lactate dehydrogenase (rS =0.54, P =0.0003) and C-reactive protein (rS =0.48, P =0.0015) levels. Moreover, in DM patients with ILD, the cumulative survival rate for 6 months was significantly lower in the group with serum PGRN levels ≥200 ng/ml (67%) than in the group with serum PGRN levels <200 ng/ml (100%) (P =0.0009). Conclusions Serum PGRN is associated with disease activity and prognosis of DM with ILD. PGRN may play a role in the pathogenesis of DM and could be a useful biomarker.
Collapse
Affiliation(s)
- Atsushi Tanaka
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Hiroshi Tsukamoto
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Hiroki Mitoma
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Chikako Kiyohara
- Department of Preventive Medicine, Kyushu University Graduate School of Medical Sciences, Fukuoka, 812-8582, Japan.
| | - Naoyasu Ueda
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Masahiro Ayano
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Shun-ichiro Ohta
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Yasutaka Kimoto
- Department of Internal Medicine, Kyushu University Beppu Hospital, Oita, 874-0838, Japan.
| | - Mitsuteru Akahoshi
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Yojiro Arinobu
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Hiroaki Niiro
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Yoshifumi Tada
- Department of Rheumatology, Faculty of Medicine, Saga University, Saga, 849-8501, Japan.
| | - Takahiko Horiuchi
- Department of Internal Medicine, Kyushu University Beppu Hospital, Oita, 874-0838, Japan.
| | - Koichi Akashi
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| |
Collapse
|
209
|
Tanimoto R, Morcavallo A, Terracciano M, Xu SQ, Stefanello M, Buraschi S, Lu KG, Bagley DH, Gomella LG, Scotlandi K, Belfiore A, Iozzo RV, Morrione A. Sortilin regulates progranulin action in castration-resistant prostate cancer cells. Endocrinology 2015; 156:58-70. [PMID: 25365768 PMCID: PMC4272403 DOI: 10.1210/en.2014-1590] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The growth factor progranulin is as an important regulator of transformation in several cellular systems. We have previously demonstrated that progranulin acts as an autocrine growth factor and stimulates motility, proliferation, and anchorage-independent growth of castration-resistant prostate cancer cells, supporting the hypothesis that progranulin may play a critical role in prostate cancer progression. However, the mechanisms regulating progranulin action in castration-resistant prostate cancer cells have not been characterized. Sortilin, a single-pass type I transmembrane protein of the vacuolar protein sorting 10 family, binds progranulin in neurons and negatively regulates progranulin signaling by mediating progranulin targeting for lysosomal degradation. However, whether sortilin is expressed in prostate cancer cells and plays any role in regulating progranulin action has not been established. Here, we show that sortilin is expressed at very low levels in castration-resistant PC3 and DU145 cells. Significantly, enhancing sortilin expression in PC3 and DU145 cells severely diminishes progranulin levels and inhibits motility, invasion, proliferation, and anchorage-independent growth. In addition, sortilin overexpression negatively modulates Akt (protein kinase B, PKB) stability. These results are recapitulated by depleting endogenous progranulin in PC3 and DU145 cells. On the contrary, targeting sortilin by short hairpin RNA approaches enhances progranulin levels and promotes motility, invasion, and anchorage-independent growth. We dissected the mechanisms of sortilin action and demonstrated that sortilin promotes progranulin endocytosis through a clathrin-dependent pathway, sorting into early endosomes and subsequent lysosomal degradation. Collectively, these results point out a critical role for sortilin in regulating progranulin action in castration-resistant prostate cancer cells, suggesting that sortilin loss may contribute to prostate cancer progression.
Collapse
Affiliation(s)
- Ryuta Tanimoto
- Departments of Urology (R.T., A.Morc., M.T., S.-Q.X., M.S., K.G.L., D.H.B., L.G.G., A.Morr.), Biology of Prostate Cancer Program (L.G.G., A.Morr.), and Pathology, Anatomy, and Cell Biology (S.B., R.V.I.) and Cancer Cell Biology and Signaling Program (R.V.I.), Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107; Department of Health Sciences (A.Morc., M.S., A.B.), Endocrinology, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; and CRS Development of Biomolecular Therapies (M.T., K.S.), Experimental Oncology Laboratory, Rizzoli Orthopedic Institute, 40136 Bologna, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
210
|
Haapasalo A, Remes AM. Genetic and Molecular Aspects of Frontotemporal Lobar Degeneration. CURRENT GENETIC MEDICINE REPORTS 2014. [DOI: 10.1007/s40142-014-0063-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
211
|
Hardy J, Rogaeva E. Motor neuron disease and frontotemporal dementia: sometimes related, sometimes not. Exp Neurol 2014; 262 Pt B:75-83. [DOI: 10.1016/j.expneurol.2013.11.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 10/27/2013] [Accepted: 11/07/2013] [Indexed: 12/12/2022]
|
212
|
Pastén K, Bastian Y, Roa-Espitia AL, Maldonado-García D, Mendoza-Hernández G, Ortiz-García CI, Mújica A, Hernández-González EO. ADAM15 participates in fertilization through a physical interaction with acrogranin. Reproduction 2014; 148:623-34. [DOI: 10.1530/rep-14-0179] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Mammalian fertilization is completed by direct interaction between sperm and egg. This process is primarily mediated by both adhesion and membrane-fusion proteins found on the gamete surface. ADAM1, 2, and 3 are members of the ADAMs protein family, and have been involved in sperm–egg binding. In this study, we demonstrate the proteolytic processing of ADAM15 during epididymal maturation of guinea pig spermatozoa to produce a mature form a size of 45 kDa. We find that the size of the mature ADAM15, 45 kDa, in cauda epididymal spermatozoa indicates that the pro-domain and metalloprotease domain are absent. In addition, using indirect immunofluorescence, ADAM15 was found throughout the acrosome, at the equatorial region and along the flagellum of guinea pig spermatozoa. After acrosome reaction, ADAM15 is lost from the acrosomal region and retained in the equatorial region and flagellum. In this study, we also report the first evidence of a complex between ADAM15 and acrogranin. By immunoprecipitation, we detected a protein band of 65 kDa which co-immunoprecipated together ADAM15. Analysis of the N-terminal sequence of this 65 kDa protein has revealed its identity as acrogranin. In addition, using cell-surface labeling, ADAM15 was found to be present on the cell surface. Assays of heterologous fertilization showed that the antibody against acrogranin inhibited the sperm–egg adhesion. Interestingly, ADAM15 and acrogranin were also found associated in two breast cancer cell lines. In conclusion, our results demonstrated that ADAM15 and acrogranin are present on and associated with the surface of guinea pig spermatozoa; besides both proteins may play a role during sperm–egg binding.
Collapse
|
213
|
Wei F, Zhang Y, Jian J, Mundra JJ, Tian Q, Lin J, Lafaille JJ, Tang W, Zhao W, Yu X, Liu CJ. PGRN protects against colitis progression in mice in an IL-10 and TNFR2 dependent manner. Sci Rep 2014; 4:7023. [PMID: 25387791 PMCID: PMC4228332 DOI: 10.1038/srep07023] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 10/24/2014] [Indexed: 12/16/2022] Open
Abstract
This study was aimed to determine the role and regulation of progranulin (PGRN) in the pathogenesis of inflammatory bowel diseases (IBD). Dextran sulfate sodium (DSS)−, picrylsulfonic acid (TNBS)-induced, bone marrow chimera and CD4+CD45Rbhi T cell transfer colitis model were established and analyzed in wild-type and several genetically-modified mice, including PGRN, IL-10 and TNFR2 deficient mice. Elevated levels of PGRN were found in colitis samples from human IBD patients and mouse colitis models in comparison to the corresponding controls. PGRN-deficient mice became highly susceptible to DSS- and TNBS-induced colitis, whereas recombinant PGRN ameliorated the pathology and reduced the histological score in both DSS and TNBS colitis models. In addition, hematopoietic-derived PGRN was critical for protection against DSS-induced colitis, and lack of PGRN signaling in CD4+ T cells also exacerbated experimental colitis. PGRN-mediated protective effect in colitis was compromised in the absence of IL-10 signaling. In addition, PGRN's effect was also largely lost in the TNFR2-deficient colitis model. Collectively, these findings not only provide the new insight into PGRN's anti-inflammatory action in vivo, but may also present PGRN and its derivatives as novel biological agent for treating IBD.
Collapse
Affiliation(s)
- Fanhua Wei
- 1] Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003 [2] Institute of Pathogenic Biology, Shandong University School of Medicine, Jinan, 250012
| | - Yuying Zhang
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003
| | - Jinlong Jian
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003
| | - Jyoti Joshi Mundra
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003
| | - Qingyun Tian
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003
| | - Jiqiang Lin
- Department of Pathology, New York University Medical Center, New York, NY, 10016
| | - Juan Jose Lafaille
- Department of Pathology, New York University Medical Center, New York, NY, 10016
| | - Wei Tang
- Institute of Pathogenic Biology, Shandong University School of Medicine, Jinan, 250012
| | - Weiming Zhao
- Institute of Pathogenic Biology, Shandong University School of Medicine, Jinan, 250012
| | - Xiuping Yu
- Institute of Pathogenic Biology, Shandong University School of Medicine, Jinan, 250012
| | - Chuan-Ju Liu
- 1] Department of Orthopaedic Surgery, New York University Medical Center, New York, NY, 10003 [2] Department of Cell Biology, New York University School of Medicine, New York, NY 10016
| |
Collapse
|
214
|
Yang Y, Aloi MS, Cudaback E, Josephsen SR, Rice SJ, Jorstad NL, Keene CD, Montine TJ. Wild-type bone marrow transplant partially reverses neuroinflammation in progranulin-deficient mice. J Transl Med 2014; 94:1224-36. [PMID: 25199051 PMCID: PMC4218738 DOI: 10.1038/labinvest.2014.113] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 07/09/2014] [Accepted: 07/11/2014] [Indexed: 01/25/2023] Open
Abstract
Frontotemporal dementia (FTD) is a neurodegenerative disease with devastating changes in behavioral performance and social function. Mutations in the progranulin gene (GRN) are one of the most common causes of inherited FTD due to reduced progranulin expression or activity, including in brain where it is expressed primarily by neurons and microglia. Thus, efforts aimed at enhancing progranulin levels might be a promising therapeutic strategy. Bone marrow (BM)-derived cells are able to engraft in the brain and adopt a microglial phenotype under myeloablative irradiation conditioning. This ability makes BM-derived cells a potential cellular vehicle for transferring therapeutic molecules to the central nervous system. Here, we utilized BM cells from Grn(+/+) (wild type or wt) mice labeled with green fluorescence protein for delivery of progranulin to progranulin-deficient (Grn(-/-)) mice. Our results showed that wt bone marrow transplantation (BMT) partially reconstituted progranulin in the periphery and in cerebral cortex of Grn(-/-) mice. We demonstrated a pro-inflammatory effect in vivo and in ex vivo preparations of cerebral cortex of Grn(-/-) mice that was partially to fully reversed 5 months after BMT. Our findings suggest that BMT can be administered as a stem cell-based approach to prevent or to treat neurodegenerative diseases.
Collapse
Affiliation(s)
- Yue Yang
- Address correspondence to: Yue Yang, Ph.D., Harborview Medical Center, 300 9th Ave, Seattle, WA, 98104, Phone: 206-897-5246, Fax: 206-897-5249,
| | | | | | | | | | | | | | | |
Collapse
|
215
|
Wong NCL, Cheung PFY, Yip CW, Chan KF, Ng IOL, Fan ST, Cheung ST. Antibody against granulin-epithelin precursor sensitizes hepatocellular carcinoma to chemotherapeutic agents. Mol Cancer Ther 2014; 13:3001-12. [PMID: 25253787 DOI: 10.1158/1535-7163.mct-14-0012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Granulin-epithelin precursor (GEP) overexpression has been shown in many cancers with functional role on growth, and recently on regulating chemoresistance and cancer stem cell (CSC) properties. Here, we investigate the combined effect of GEP antibody and chemotherapeutic agent. Combination therapy was compared with monotherapy using hepatocellular carcinoma (HCC) cells in vitro and orthotopic liver tumor models in vivo. CD133 and related hepatic CSC marker expressions were investigated by flow cytometry. Antiproliferative and apoptotic effects and signaling mechanisms were examined by immunohistochemistry, flow cytometry, and Western blot analysis. Secretory GEP levels in the serum and culture supernatant samples were measured by ELISA. We demonstrated that HCC cells that survived under chemotherapeutic agents showed upregulation of hepatic CSC markers CD133/GEP/ABCB5, and enhanced colony and spheroid formation abilities. Importantly, GEP antibody sensitized HCC cells to the apoptosis induced by chemotherapy for both HCC cell lines and the chemoresistant subpopulations, and counteracted the chemotherapy-induced GEP/ABCB5 expressions and Akt/Bcl-2 signaling. In human HCC orthotopic xenograft models, GEP antibody treatment alone was consistently capable of inhibiting the tumor growth. Notably, combination of GEP antibody with high dose of cisplatin resulted in the eradication of all established intrahepatic tumor in three weeks. This preclinical study demonstrated that GEP antibody sensitized HCC cells to apoptosis induced by chemotherapeutic agents. Combination treatment with GEP antibody and chemotherapeutic agent has the potential to be an effective therapeutic regimen for GEP-expressing cancers.
Collapse
Affiliation(s)
| | - Phyllis F Y Cheung
- Department of Surgery, The University of Hong Kong, Hong Kong. Centre for Cancer Research, The University of Hong Kong, Hong Kong
| | - Chi Wai Yip
- Department of Surgery, The University of Hong Kong, Hong Kong. Centre for Cancer Research, The University of Hong Kong, Hong Kong
| | - Kui Fat Chan
- Department of Pathology, Tuen Mun Hospital, Hong Kong
| | - Irene Oi-Lin Ng
- Centre for Cancer Research, The University of Hong Kong, Hong Kong. Department of Pathology, The University of Hong Kong, Hong Kong. State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong
| | - Sheung Tat Fan
- Department of Surgery, The University of Hong Kong, Hong Kong. Centre for Cancer Research, The University of Hong Kong, Hong Kong. State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong
| | - Siu Tim Cheung
- Department of Surgery, The University of Hong Kong, Hong Kong. Centre for Cancer Research, The University of Hong Kong, Hong Kong. State Key Laboratory for Liver Research, The University of Hong Kong, Hong Kong.
| |
Collapse
|
216
|
Zhang N, Yang N, Chen Q, Qiu F, Li X. Upregulated expression level of the growth factor, progranulin, is associated with the development of primary Sjögren's syndrome. Exp Ther Med 2014; 8:1643-1647. [PMID: 25289074 PMCID: PMC4186362 DOI: 10.3892/etm.2014.1981] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 08/05/2014] [Indexed: 01/12/2023] Open
Abstract
The aim of the present study was to investigate the expression and effect of progranulin (PGRN) in patients with primary Sjögren’s syndrome (pSS). In total, 26 newly diagnosed pSS patients and 26 healthy subjects were enrolled in this study. The serum levels of PGRN and the inflammatory factor, interleukin-6 (IL-6), were detected using ELISA. In addition, the mRNA expression levels of these molecules were detected by quantitative polymerase chain reaction. The serum levels of PGRN and IL-6 in the pSS patients increased significantly compared with the healthy controls (P<0.05). During the remission stages, the levels of PGRN and IL-6 were comparable to those of the healthy controls. The serum level of PGRN in the pSS patients was shown to correlate with that of IL-6 in the pre-treatment and post-treatment stages. PGRN was upregulated in the pSS patients, indicating a possible role of PGRN in the pathogenesis and development of pSS.
Collapse
Affiliation(s)
- Ni Zhang
- Department of Hematology, Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Ning Yang
- Center for Oncology, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Qilin Chen
- Department of Rheumatology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Feng Qiu
- Department of Rheumatology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Xingfu Li
- Department of Rheumatology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| |
Collapse
|
217
|
Zhao YP, Liu B, Tian QY, Wei JL, Richbourgh B, Liu CJ. Progranulin protects against osteoarthritis through interacting with TNF-α and β-Catenin signalling. Ann Rheum Dis 2014; 74:2244-2253. [PMID: 25169730 DOI: 10.1136/annrheumdis-2014-205779] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 08/02/2014] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Progranulin (PGRN) was previously isolated as an osteoarthritis (OA)-associated growth factor. Additionally, PGRN was found to play a therapeutic role in inflammatory arthritis mice models through antagonising tumour necrosis factor α (TNF-α). This study was aimed at investigating the role of PGRN in degradation of cartilage and progression of OA. METHODS Progression of OA was analysed in both spontaneous and surgically induced OA models in wild type and PGRN-deficient mice. Cartilage degradation and OA were evaluated using Safranin O staining, immunohistochemistry and ELISA. Additionally, mRNA expression of degenerative factors and catabolic markers known to be involved in cartilage degeneration in OA were analysed. Furthermore, the anabolic effects and underlying mechanisms of PGRN were investigated by in vitro experiments with primary chondrocytes. RESULTS Here, we found that deficiency of PGRN led to spontaneous OA-like phenotype in 'aged' mice. Additionally, PGRN-deficient mice exhibited exaggerated breakdown of cartilage structure and OA progression, while local delivery of recombinant PGRN protein attenuated degradation of cartilage matrix and protected against OA development in surgically induced OA models. Furthermore, PGRN activated extracellular signal-regulated kinases (ERK) 1/2 signalling and elevated the levels of anabolic biomarkers in human chondrocyte, and the protective function of PGRN was mediated mainly through TNF receptor 2. Additionally, PGRN suppressed inflammatory action of TNF-α and inhibited the activation of β-Catenin signalling in cartilage and chondrocytes. CONCLUSIONS Collectively, this study provides new insight into the pathogenesis of OA, and also presents PGRN as a potential target for the treatment of joint degenerative diseases, including OA.
Collapse
Affiliation(s)
- Yun-Peng Zhao
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA.,Department of Orthopaedic Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, China
| | - Ben Liu
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA.,Department of Orthopaedic Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, China
| | - Qing-Yun Tian
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA
| | - Jian-Lu Wei
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA
| | - Brendon Richbourgh
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA
| | - Chuan-Ju Liu
- Department of Orthopaedic Surgery, Hospital for Joint Diseases, New York University, New York, New York, USA.,Department of Cell Biology, New York University School of Medicine, New York, New York, USA
| |
Collapse
|
218
|
D'Alton S, Lewis J. Therapeutic and diagnostic challenges for frontotemporal dementia. Front Aging Neurosci 2014; 6:204. [PMID: 25191265 PMCID: PMC4137452 DOI: 10.3389/fnagi.2014.00204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 07/25/2014] [Indexed: 12/12/2022] Open
Abstract
In the search for therapeutic modifiers, frontotemporal dementia (FTD) has traditionally been overshadowed by other conditions such as Alzheimer's disease (AD). A clinically and pathologically diverse condition, FTD has been galvanized by a number of recent discoveries such as novel genetic variants in familial and sporadic forms of disease and the identification of TAR DNA binding protein of 43 kDa (TDP-43) as the defining constituent of inclusions in more than half of cases. In combination with an ever-expanding knowledge of the function and dysfunction of tau-a protein which is pathologically aggregated in the majority of the remaining cases-there exists a greater understanding of FTD than ever before. These advances may indicate potential approaches for the development of hypothetical therapeutics, but FTD remains highly complex and the roles of tau and TDP-43 in neurodegeneration are still wholly unclear. Here the challenges facing potential therapeutic strategies are discussed, which include sufficiently accurate disease diagnosis and sophisticated technology to deliver effective therapies.
Collapse
Affiliation(s)
- Simon D'Alton
- Department of Neuroscience, Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida Gainesville, FL, USA
| | - Jada Lewis
- Department of Neuroscience, Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida Gainesville, FL, USA
| |
Collapse
|
219
|
Yip CW, Cheung PFY, Leung ICY, Wong NCL, Cheng CKC, Fan ST, Cheung ST. Granulin-epithelin precursor interacts with heparan sulfate on liver cancer cells. Carcinogenesis 2014; 35:2485-94. [PMID: 25115442 PMCID: PMC4216055 DOI: 10.1093/carcin/bgu164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The first study to demonstrate HS to affect GEP binding on the cell surface. Granulin-epithelin precursor (GEP) is a pluripotent secretory growth factor which promotes cancer progression in a number of human cancers. However, how cancer cells interact with GEP remains unknown. In this study, we aimed to identify the cell surface-binding partner of GEP on liver cancer cells. Human recombinant GEP (rGEP) was expressed and purified to homogeneity. The rGEP was shown to trigger phosphorylation of AKT and ERK1/2 in liver cancer cells. We demonstrated cell surface attachment of rGEP, which was blocked by prebinding of platelet-derived growth factor-AA, platelet-derived growth factor-BB and fibroblast growth factor-2. Therefore, heparan sulfate (HS) had been reasoned as the binding partner of rGEP. Heparinase digestion validated the role of HS on supporting the attachment. The heparin-binding domain of GEP was mapped to RRH(555-557) in the C-terminal region. Suppression of the HS polymerase exostosin-1 reduced the rGEP binding and rGEP-mediated signaling transduction. Suppression of a specific HS proteoglycan, glypican-3, also showed a partial reduction of rGEP binding and an inhibition on rGEP-mediated activation of AKT. Furthermore, glypican-3 was shown to correlate with the expressions of GEP in clinical samples (Spearman’s ρ = 0.363, P = 0.001). This study identified HS, partly through glypican-3, as a novel binding partner of GEP on the surface of liver cancer cells.
Collapse
Affiliation(s)
- Chi Wai Yip
- Department of Surgery, Centre for Cancer Research and
| | | | | | | | | | | | | |
Collapse
|
220
|
Li M, Liu Y, Xia F, Wu Z, Deng L, Jiang R, Guo FJ. Progranulin is required for proper ER stress response and inhibits ER stress-mediated apoptosis through TNFR2. Cell Signal 2014; 26:1539-48. [DOI: 10.1016/j.cellsig.2014.03.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 03/25/2014] [Accepted: 03/25/2014] [Indexed: 12/14/2022]
|
221
|
Edelman MJ, Feliciano J, Yue B, Bejarano P, Ioffe O, Reisman D, Hawkins D, Gai Q, Hicks D, Serrero G. GP88 (progranulin): a novel tissue and circulating biomarker for non-small cell lung carcinoma. Hum Pathol 2014; 45:1893-9. [PMID: 25033727 DOI: 10.1016/j.humpath.2014.05.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/16/2014] [Accepted: 05/21/2014] [Indexed: 11/29/2022]
Abstract
GP88 (progranulin) is a growth and survival factor implicated in tumorigenesis and drug resistance. Previous studies showed that GP88 was expressed in breast cancer tissue in inverse correlation with survival. This study evaluates GP88 tissue expression in localized/locally advanced lung cancer and GP88 serum levels in advanced disease. GP88 expression was determined by immunohistochemistry in tumor tissue from non-small cell lung carcinoma (NSCLC) patients, 85 with localized (stage I-II), and 40 with locally advanced disease (stage IIIa) and correlated with clinical outcome. Serum GP88 levels from stage IIIb/IV patients, quantified by enzyme immunoassay were compared with GP88 levels from patients with chronic obstructive pulmonary disease and healthy individuals. GP88 was expressed in more than 80% adenocarcinoma and squamous cell carcinoma in contrast to normal lung or small cell lung cancer. There was a statistically significant inverse association of GP88 expression (GP88 immunohistochemistry score, 3+ versus < 3+) with survival for patients with localized resected NSCLC with hazard ratio (HR) = 2.28 (P = .0076) for disease-free survival and HR = 2.17 (P = .014) for overall survival. A statistically significant decrease in progression-free survival (HR = 2.9; P = .022) for GP88 scores of 3+ versus less than 3+ was observed for stage IIIa after chemoradiotherapy. In addition, serum GP88 was significantly elevated in stage IIIb/IV NSCLC compared with control subjects (49.9 ng/mL versus 28.4 ng/mL; P < .0001). This is the first study demonstrating GP88 tissue and serum expression as a prognostic biomarker in localized and advanced disease. Future research will determine utility of monitoring GP88 and the potential of GP88 expression as a predictive marker for anti-GP88 therapeutics.
Collapse
Affiliation(s)
- Martin J Edelman
- Department of Medicine, University of Maryland School of Medicine, Greenebaum Cancer Center, Baltimore, MD 21201
| | - Josephine Feliciano
- Department of Medicine, University of Maryland School of Medicine, Greenebaum Cancer Center, Baltimore, MD 21201
| | | | - Pablo Bejarano
- Department of Pathology, Cleveland Clinic Florida, Weston, FL 33331
| | - Olga Ioffe
- Department of Pathology, University of Maryland School of Medicine, Greenebaum Cancer Center, Baltimore MD 21201
| | - David Reisman
- Department of Medicine, University of Florida, Gainesville, FL 32610
| | - Douglas Hawkins
- School of Statistics University of Minnesota, Minneapolis, MN 55455
| | - Qiwei Gai
- Department of Medicine, University of Maryland School of Medicine, Greenebaum Cancer Center, Baltimore, MD 21201
| | | | - Ginette Serrero
- A&G Pharmaceutical, Columbia MD 21045; University of Maryland, Greenebaum Cancer Center, Baltimore, MD 21201.
| |
Collapse
|
222
|
Suh HS, Lo Y, Choi N, Letendre S, Lee SC. Evidence of the innate antiviral and neuroprotective properties of progranulin. PLoS One 2014; 9:e98184. [PMID: 24878635 PMCID: PMC4039467 DOI: 10.1371/journal.pone.0098184] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 04/29/2014] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Compelling data exist that show that normal levels of progranulin (PGRN) are required for successful CNS aging. PGRN production is also modulated by inflammation and infection, but no data are available on the production and role of PGRN during CNS HIV infection. METHODS To determine the relationships between PGRN and HIV disease, neurocognition, and inflammation, we analyzed 107 matched CSF and plasma samples from CHARTER, a well-characterized HIV cohort. Levels of PGRN were determined by ELISA and compared to levels of several inflammatory mediators (IFNγ, IL-6, IL-10, IP-10, MCP-1, TNFα, IL-1β, IL-4 and IL-13), as well as clinical, virologic and demographic parameters. The relationship between HIV infection and PGRN was also examined in HIV-infected primary human microglial cultures. RESULTS In plasma, PGRN levels correlated with the viral load (VL, p<0.001). In the CSF of subjects with undetectable VL, lower PGRN was associated with neurocognitive impairment (p = 0.046). CSF PGRN correlated with CSF IP-10, TNFα and IL-10, and plasma PGRN correlated with plasma IP-10. In vitro, microglial HIV infection increased PGRN production and PGRN knockdown increased HIV replication, demonstrating that PGRN is an innate antiviral protein. CONCLUSIONS We propose that PGRN plays dual roles in people living with HIV disease. With active HIV replication, PGRN is induced in infected macrophages and microglia and functions as an antiviral protein. In individuals without active viral replication, decreased PGRN production contributes to neurocognitive dysfunction, probably through a diminution of its neurotrophic functions. Our results have implications for the pathogenesis, biomarker studies and therapy for HIV diseases including HIV-associated neurocognitive dysfunction (HAND).
Collapse
Affiliation(s)
- Hyeon-Sook Suh
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, United States of America
- * E-mail: (HSS); (SCL)
| | - Yungtai Lo
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Namjong Choi
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Scott Letendre
- Department of Neurology, University of California San Diego, San Diego, California, United States of America
| | - Sunhee C. Lee
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, United States of America
- * E-mail: (HSS); (SCL)
| |
Collapse
|
223
|
Regulation of chondrocyte differentiation by IRE1α depends on its enzymatic activity. Cell Signal 2014; 26:1998-2007. [PMID: 24863879 DOI: 10.1016/j.cellsig.2014.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 05/15/2014] [Indexed: 12/27/2022]
Abstract
Bone morphogenetic protein 2(BMP2) is known to activate unfolded protein response (UPR) signal molecules in chondrogenesis. Inositol-requiring enzyme-1α (IRE1α),as one of three unfolded protein sensors in UPR signaling pathways, can be activated during ER stress. However, the influence on IRE1α in chondrocyte differentiation has not yet been elucidated. Here we present evidence demonstrating that overexpression of IRE1α inhibits chondrocyte differentiation, as revealed by reduced expression of collagen II (ColII), Sox9, collagen X (ColX), matrix metalloproteinase 13 (MMP-13), Indian hedgehog (IHH), Runx2 and enhanced expression of parathyroid hormone-related peptide (PTHrP). Furthermore, IRE1α-mediated inhibition of chondrogenesis depends on its enzymatic activity, since its point mutant lacking enzymatic activity completely loses this activity. The RNase and Kinase domains of IRE1α C-terminal are necessary for its full enzymatic activity and inhibition of chondrocyte differentiation. Mechanism studies demonstrate that granulin-epithelin precursor(GEP), a growth factor known to stimulate chondrogenesis, induced IRE1α expression in chondrogenesis. The expression of IRE1α is depended on GEP signaling, and IRE1α expression is hardly detectable in GEP(-/-) embryos. In addition, IRE1α inhibits GEP-mediated chondrocyte differentiation as a negative regulator. Altered expression of IRE1α in chondrocyte hypertrophy was accompanied by altered levels of IHH and PTHrP. Collectively, IRE1α may be a novel regulator of chondrocyte differentiation by 1) inhibition GEP-mediated chondrocyte differentiation as a negative regulator; 2) promoting IHH/PTHrP signaling.
Collapse
|
224
|
IRE1a constitutes a negative feedback loop with BMP2 and acts as a novel mediator in modulating osteogenic differentiation. Cell Death Dis 2014; 5:e1239. [PMID: 24853417 PMCID: PMC4047903 DOI: 10.1038/cddis.2014.194] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 03/27/2014] [Accepted: 03/31/2014] [Indexed: 12/27/2022]
Abstract
Bone morphogenetic protein 2 (BMP2) is known to activate unfolded protein response (UPR) signaling molecules, such as BiP (IgH chain-binding protein), PERK (PKR-like ER-resistant kinase), and IRE1α. Inositol-requiring enzyme-1a (IRE1a), as one of three unfolded protein sensors in UPR signaling pathways, can be activated during ER stress. Granulin-epithelin precursor (GEP) is an autocrine growth factor that has been implicated in embryonic development, tissue repair, tumorigenesis, and inflammation. However, the influence on IRE1a in BMP2-induced osteoblast differentiation has not yet been elucidated. Herein we demonstrate that overexpression of IRE1a inhibits osteoblast differentiation, as revealed by reduced activity of alkaline phosphatase (ALP) and osteocalcin; however, knockdown of IRE1a via the RNAi approach stimulates osteoblastogenesis. Mechanistic studies revealed that the expression of IRE1a during osteoblast was a consequence of JunB transcription factor binding to several AP1 sequence (TGAG/CTCA) in the 5'-flanking regulatory region of the IRE1a gene, followed by transcription. In addition, GEP induces IRE1a expressions and this induction of IRE1a by GEP depends on JunB. Furthermore, IRE1a inhibition of GEP-induced osteoblastogenesis relies on JunB. Besides, GEP is required for IRE1a inhibition of BMP2-induced bone formation. Collectively, these findings demonstrate that IRE1a negatively regulates BMP2-induced osteoblast differentiation and this IRE1a inhibition effect depends on GEP growth factor. Thus, IRE1a, BMP2, GEP growth factor, and JunB transcription factor form a regulatory loop and act in concert in the course of osteoblastogenesis.
Collapse
|
225
|
Guo FJ, Xiong Z, Han X, Liu C, Liu Y, Jiang R, Zhang P. XBP1S, a BMP2-inducible transcription factor, accelerates endochondral bone growth by activating GEP growth factor. J Cell Mol Med 2014; 18:1157-71. [PMID: 24636354 PMCID: PMC4508155 DOI: 10.1111/jcmm.12261] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 01/24/2014] [Indexed: 01/22/2023] Open
Abstract
We previously reported that transcription factor XBP1S binds to RUNX2 and enhances chondrocyte hypertrophy through acting as a cofactor of RUNX2. Herein, we report that XBP1S is a key downstream molecule of BMP2 and is required for BMP2-mediated chondrocyte differentiation. XBP1S is up-regulated during chondrocyte differentiation and demonstrates the temporal and spatial expression pattern during skeletal development. XBP1S stimulates chondrocyte differentiation from mesenchymal stem cells in vitro and endochondral ossification ex vivo. In addition, XBP1S activates granulin-epithelin precursor (GEP), a growth factor known to stimulate chondrogenesis, and endogenous GEP is required, at least in part, for XBP1S-stimulated chondrocyte hypertrophy, mineralization and endochondral bone formation. Furthermore, XBP1S enhances GEP-stimulated chondrogenesis and endochondral bone formation. Collectively, these findings demonstrate that XBP1S, a BMP2-inducible transcription factor, positively regulates endochondral bone formation by activating GEP chondrogenic growth factor.
Collapse
Affiliation(s)
- Feng-Jin Guo
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing, China
| | | | | | | | | | | | | |
Collapse
|
226
|
Evidence of TRK-Fused Gene (TFG1) function in the ubiquitin-proteasome system. Neurobiol Dis 2014; 66:83-91. [PMID: 24613659 DOI: 10.1016/j.nbd.2014.02.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/29/2014] [Accepted: 02/25/2014] [Indexed: 11/23/2022] Open
Abstract
A heterozygous mutation in the TRK-Fused Gene (TFG1) has recently been identified in hereditary motor and sensory neuropathy with proximal dominant involvement (HMSN-P). TFG1 protein is reportedly localized at endoplasmic reticulum (ER) exit sites and modulates ER export, but the mechanism of its action in neurodegeneration remains unclear. To clarify the molecular pathogenesis of HMSN-P, we examined the biochemical and cellular characteristics of wild-type and mutant (P285L) TFG1 in vitro. A coexpression study of human TFG1 and ER substrates, which are degraded by the ubiquitin-proteasome system (UPS), showed that TFG1 is an inhibitory regulator of the UPS. Deletion mutant constructs revealed that the proline/glutamine-rich domain in TFG1 was critical for regulation of the UPS and proper localization at ER exit sites. Furthermore, overexpression of wild-type TFG1 increased ubiquitination of ER-resident proteins and led to ER stress. Mutant (P285L) TFG1, which is in the proline/glutamine-rich domain, enhanced the inhibitory effect on the UPS and the level of ER stress. These data provide new pathological insights into HMSN-P, and we suspect that the pathogenesis is tightly associated with disruption of intracellular protein homeostasis and ER stress.
Collapse
|
227
|
Zhao Y, Liu B, Liu CJ. Establishment of a surgically-induced model in mice to investigate the protective role of progranulin in osteoarthritis. J Vis Exp 2014:e50924. [PMID: 24638128 DOI: 10.3791/50924] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Destabilization of medial meniscus (DMM) model is an important tool for studying the pathophysiological roles of numerous arthritis associated molecules in the pathogenesis of osteoarthritis (OA) in vivo. However, the detailed, especially the visualized protocol for establishing this complicated model in mice, is not available. Herein we took advantage of wildtype and progranulin (PGRN)-/- mice as examples to introduce a protocol for inducing DMM model in mice, and compared the onset of OA following establishment of this surgically induced model. The operations performed on mice were either sham operation, which just opened joint capsule, or DMM operation, which cut the menisco-tibial ligament and caused destabilization of medial meniscus. Osteoarthritis severity was evaluated using histological assay (e.g. Safranin O staining), expressions of OA-associated genes, degradation of cartilage extracellular matrix molecules, and osteophyte formation. DMM operation successfully induced OA initiation and progression in both wildtype and PGRN-/- mice, and loss of PGNR growth factor led to a more severe OA phenotype in this surgically induced model.
Collapse
Affiliation(s)
- Yunpeng Zhao
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases
| | - Ben Liu
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases
| | - Chuan-ju Liu
- Department of Orthopaedic Surgery, New York University Medical Center;
| |
Collapse
|
228
|
Ungurs MJ, Sinden NJ, Stockley RA. Progranulin is a substrate for neutrophil-elastase and proteinase-3 in the airway and its concentration correlates with mediators of airway inflammation in COPD. Am J Physiol Lung Cell Mol Physiol 2014; 306:L80-7. [DOI: 10.1152/ajplung.00221.2013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Progranulin (PGRN) is an anti-inflammatory protein, yet its digestion by neutrophil-derived proteinases generates products that can stimulate epithelial cell lines to secrete the neutrophil chemoattractant interleukin (IL)-8. Because dysregulated neutrophilic inflammation is implicated in the pathophysiology of chronic obstructive pulmonary disease (COPD), the possible influence of PGRN and digestion products may be of relevance to understanding and treating inflammation in the disease. PGRN was measured in sputum sol-phase samples from patients with a clinical diagnosis of COPD and chronic sputum production in a clinically stable state; PGRN correlated negatively with bacterial load (colony-forming units/ml) ( r = −0.446, P = 0.003, n = 43) and markers of neutrophilic inflammation, including neutrophil elastase (NE, nM) ( r = −0.562, P = 0.008, n = 21) and proteinase-3 (PR3, nM) ( r = −0.515, P = 0.017, n = 21). Products of PGRN digestion were detected in sputum sol phase, and PGRN conversion activity in sputum sol phase was inhibited with the serine proteinase inhibitor α1-antitrypsin. Digested PGRN at concentrations likely to be present in the airways did not stimulate IL-8 secretion from normal human bronchial epithelial (NHBE) cells. Infection of NHBE cells with live Haemophilus influenzae significantly increased PGRN secretion compared with untreated cells ( P ≤ 0.001). The concentration of PGRN relates negatively to the amplified airway inflammation associated with bacterial colonization in clinically stable COPD. This relationship is driven by the proteolytic action of the neutrophil-derived proteinases NE and PR3; the products released by this action are unlikely to stimulate significant IL-8 secretion from epithelial cells in the airways.
Collapse
Affiliation(s)
- Michael J. Ungurs
- Centre for Translational Inflammation, University of Birmingham Research Laboratories, Queen Elizabeth Hospital, Birmingham, United Kingdom; and
| | - Nicola J. Sinden
- Centre for Translational Inflammation, University of Birmingham Research Laboratories, Queen Elizabeth Hospital, Birmingham, United Kingdom; and
| | - Robert A. Stockley
- The ADAPT project, Lung Function and Sleep Department, Queen Elizabeth Hospital, Birmingham, United Kingdom
| |
Collapse
|
229
|
Lee WC, Almeida S, Prudencio M, Caulfield TR, Zhang YJ, Tay WM, Bauer PO, Chew J, Sasaguri H, Jansen-West KR, Gendron TF, Stetler CT, Finch N, Mackenzie IR, Rademakers R, Gao FB, Petrucelli L. Targeted manipulation of the sortilin-progranulin axis rescues progranulin haploinsufficiency. Hum Mol Genet 2013; 23:1467-78. [PMID: 24163244 PMCID: PMC3929086 DOI: 10.1093/hmg/ddt534] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Progranulin (GRN) mutations causing haploinsufficiency are a major cause of frontotemporal lobar degeneration (FTLD-TDP). Recent discoveries demonstrating sortilin (SORT1) is a neuronal receptor for PGRN endocytosis and a determinant of plasma PGRN levels portend the development of enhancers targeting the SORT1–PGRN axis. We demonstrate the preclinical efficacy of several approaches through which impairing PGRN's interaction with SORT1 restores extracellular PGRN levels. Our report is the first to demonstrate the efficacy of enhancing PGRN levels in iPSC neurons derived from frontotemporal dementia (FTD) patients with PGRN deficiency. We validate a small molecule preferentially increases extracellular PGRN by reducing SORT1 levels in various mammalian cell lines and patient-derived iPSC neurons and lymphocytes. We further demonstrate that SORT1 antagonists and a small-molecule binder of PGRN588–593, residues critical for PGRN–SORT1 binding, inhibit SORT1-mediated PGRN endocytosis. Collectively, our data demonstrate that the SORT1–PGRN axis is a viable target for PGRN-based therapy, particularly in FTD-GRN patients.
Collapse
Affiliation(s)
- Wing C Lee
- Department of Neuroscience, Mayo Clinic Jacksonville, 4500 San Pablo Rd S, Jacksonville, FL 32224, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
230
|
Hwang HJ, Jung TW, Hong HC, Choi HY, Seo JA, Kim SG, Kim NH, Choi KM, Choi DS, Baik SH, Yoo HJ. Progranulin protects vascular endothelium against atherosclerotic inflammatory reaction via Akt/eNOS and nuclear factor-κB pathways. PLoS One 2013; 8:e76679. [PMID: 24098801 PMCID: PMC3786912 DOI: 10.1371/journal.pone.0076679] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 08/25/2013] [Indexed: 12/22/2022] Open
Abstract
Objective Atherosclerosis is considered a chronic inflammatory disease, initiated by activation and dysfunction of the endothelium. Recently, progranulin has been regarded as an important modulator of inflammatory processes; however, the role for prgranulin in regulating inflammation in vascular endothelial cells has not been described. Method and Results Signaling pathways mediated by progranulin were analyzed in human umbilical vein endothelial cells (HUVECs) treated with progranulin. Progranulin significantly induced Akt and endothelial nitric oxide synthase (eNOS) phosphorylation in HUVECs, an effect that was blocked with Akt inhibitor. Furthermore, nitric oxide (NO) level, the end product of Akt/eNOS pathway, was significantly upregulated after progranulin treatment. Next, we showed that progranulin efficiently inhibited lipopolysaccharide (LPS)-mediated pro-inflammatory signaling. LPS-induced phosphorylation of IκB and nuclear factor-κB (NF-κB) levels decreased after progranulin treatment. Also, progranulin blocked translocation of NF-κB from the cytosol to the nucleus. In addition, progranulin significantly reduced the expression of vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) by inhibiting binding of NF- κB to their promoter regions and blocked attachment of monocytes to HUVECs. Progranulin also significantly reduced the expression of tumor necrosis factor receptor-α (TNF-α) and monocyte chemo-attractant protein-1 (MCP-1), the crucial inflammatory molecules known to aggravate atherosclerosis. Conclusion Progranulin efficiently inhibited LPS-mediated pro-inflammatory signaling in endothelial cells through activation of the Akt/eNOS pathway and attenuation of the NF-κB pathway, suggesting its protective roles in vascular endothelium against inflammatory reaction underlying atherosclerosis.
Collapse
Affiliation(s)
- Hwan-Jin Hwang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Tae Woo Jung
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Ho Cheol Hong
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Hae Yoon Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Ji-A Seo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Sin Gon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Nan Hee Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Kyung Mook Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Dong Seop Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Sei Hyun Baik
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
| | - Hye Jin Yoo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
- * E-mail:
| |
Collapse
|
231
|
Crevicular fluid and serum concentrations of progranulin and high sensitivity CRP in chronic periodontitis and type 2 diabetes. DISEASE MARKERS 2013; 35:389-94. [PMID: 24191130 PMCID: PMC3809747 DOI: 10.1155/2013/803240] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/13/2013] [Accepted: 08/04/2013] [Indexed: 02/06/2023]
Abstract
Introduction. This study was designed to correlate the serum and gingival crevicular fluid (GCF) levels of progranulin (PGRN) and high sensitivity C-reactive protein (hs CRP) in chronic periodontitis and type 2 diabetes mellitus (DM). Design. PGRN and hs CRP levels were estimated in 3 groups: healthy, chronic periodontitis, and type 2 DM with chronic periodontitis. Results. The mean PGRN and hs CRP concentrations in serum and GCF were the highest for group 3 followed by group 2 and the least in group 1. Conclusion. PGRN and hs CRP may be biomarkers of the inflammatory response in type 2 DM and chronic periodontitis.
Collapse
|
232
|
Almeida MR, Baldeiras I, Ribeiro MH, Santiago B, Machado C, Massano J, Guimarães J, Resende Oliveira C, Santana I. Progranulin peripheral levels as a screening tool for the identification of subjects with progranulin mutations in a Portuguese cohort. NEURODEGENER DIS 2013; 13:214-23. [PMID: 24022032 DOI: 10.1159/000352022] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 05/13/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Progranulin (PGRN) mutations are associated with different clinical phenotypes, including frontotemporal lobar degeneration (FTLD), corticobasal syndrome (CBS) and Alzheimer's disease (AD). As all pathogenic PGRN mutations identified so far cause disease through haploinsufficiency, determination of PGRN levels has been proposed as a reliable method to identify mutation carriers. OBJECTIVE To evaluate the accuracy of peripheral PGRN levels in the identification of the PGRN mutation carriers detected thus far in our Portuguese cohort. METHODS Serum PGRN levels were measured in 244 subjects (124 patients in the spectrum of FTLD, 2 asymptomatic descendants of a FTLD patient, 56 AD patients and 64 controls) by a novel commercial ELISA kit. RESULTS Low PGRN levels were detected in 7 individuals (5 behavioral variant frontotemporal dementia, 1 CBS, and 1 still clinically unaffected) that constituted the group of the null PGRN mutation carriers previously identified in our molecular diagnostic laboratory. The pathogenic mutations found consisted of 4 insertion-deletions, causing frameshifts resulting in premature stop codons, 3 of which were novel. In addition, a normal PGRN level was found in a patient harboring a novel missense variant. For this novel ELISA kit, we established a PGRN cut-off level that identified with 100% accuracy the pathogenic mutation carriers. CONCLUSION This study supports the use of a novel assay for the determination of PGRN levels as a screening procedure to identify patients harboring null PGRN mutations. This approach would significantly decrease the required PGRN mutation analysis workload and should be extended to other clinical phenotypes than behavioral variant frontotemporal dementia and to apparently sporadic cases.
Collapse
Affiliation(s)
- Maria Rosário Almeida
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
233
|
Progranulin does not bind tumor necrosis factor (TNF) receptors and is not a direct regulator of TNF-dependent signaling or bioactivity in immune or neuronal cells. J Neurosci 2013; 33:9202-13. [PMID: 23699531 DOI: 10.1523/jneurosci.5336-12.2013] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Progranulin (PGRN) is a secreted glycoprotein expressed in neurons and glia that is implicated in neuronal survival on the basis that mutations in the GRN gene causing haploinsufficiency result in a familial form of frontotemporal dementia (FTD). Recently, a direct interaction between PGRN and tumor necrosis factor receptors (TNFR I/II) was reported and proposed to be a mechanism by which PGRN exerts anti-inflammatory activity, raising the possibility that aberrant PGRN-TNFR interactions underlie the molecular basis for neuroinflammation in frontotemporal lobar degeneration pathogenesis. Here, we report that we find no evidence for a direct physical or functional interaction between PGRN and TNFRs. Using coimmunoprecipitation and surface plasmon resonance (SPR) we replicated the interaction between PGRN and sortilin and that between TNF and TNFRI/II, but not the interaction between PGRN and TNFRs. Recombinant PGRN or transfection of a cDNA encoding PGRN did not antagonize TNF-dependent NFκB, Akt, and Erk1/2 pathway activation; inflammatory gene expression; or secretion of inflammatory factors in BV2 microglia and bone marrow-derived macrophages (BMDMs). Moreover, PGRN did not antagonize TNF-induced cytotoxicity on dopaminergic neuroblastoma cells. Last, co-addition or pre-incubation with various N- or C-terminal-tagged recombinant PGRNs did not alter lipopolysaccharide-induced inflammatory gene expression or cytokine secretion in any cell type examined, including BMDMs from Grn+/- or Grn-/- mice. Therefore, the neuroinflammatory phenotype associated with PGRN deficiency in the CNS is not a direct consequence of the loss of TNF antagonism by PGRN, but may be a secondary response by glia to disrupted interactions between PGRN and Sortilin and/or other binding partners yet to be identified.
Collapse
|
234
|
Carlson AM, Maurer MJ, Goergen KM, Kalli KR, Erskine CL, Behrens MD, Knutson KL, Block MS. Utility of progranulin and serum leukocyte protease inhibitor as diagnostic and prognostic biomarkers in ovarian cancer. Cancer Epidemiol Biomarkers Prev 2013; 22:1730-5. [PMID: 23878295 DOI: 10.1158/1055-9965.epi-12-1368] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Epithelial ovarian cancer (EOC) is the fifth leading cause of cancer-related death in females and leading gynecologic cause of cancer-related death. Despite the identification of a number of serum biomarkers, methods to identify early-stage disease and predict prognosis remain scarce. We have evaluated two biologically connected serum biomarkers, serum leukocyte protease inhibitor (SLPI) and progranulin (PGRN). METHODS Two-hundred frozen plasma samples were acquired from the Mayo Clinic Biospecimen Repository for Ovarian Cancer Research. Samples were obtained from 50 patients with benign conditions, 50 with American Joint Committee on Cancer (AJCC) stage I and II EOC, and 100 with AJCC stage III and IV EOC. Samples were obtained before surgical resection of a mass and were analyzed for absolute levels of SLPI and PGRN using ELISA assays. Receiver-operator characteristic curves were generated for SLPI and PGRN. Median follow-up was 48 months. RESULTS Absolute levels of SLPI were significantly elevated in patients with EOC compared with benign disease and predicted the presence of EOC (AUC of 0.812; P = 0.04); SLPI remained elevated in the subset of patients with normal CA-125. PGRN levels were not significantly increased in patients with early-stage or late-stage EOC as a whole, but an increase in PGRN levels was associated with decreased overall survival in advanced EOC. CONCLUSIONS SLPI levels are elevated in EOC, and SLPI shows promise as a diagnostic biomarker for patients with both elevated and normal CA-125 levels. An increase in PGRN is associated with decreased overall survival. IMPACT SLPI is elevated in EOC and warrants investigation in a screening study in women at risk for EOC.
Collapse
Affiliation(s)
- Aaron M Carlson
- Authors' Affiliations: Mayo Medical School, Biomedical Statistics and Informatics, and Departments of Medical Oncology and Immunology, Mayo Clinic, Rochester, Minnesota
| | | | | | | | | | | | | | | |
Collapse
|
235
|
Kawase R, Ohama T, Matsuyama A, Matsuwaki T, Okada T, Yamashita T, Yuasa-Kawase M, Nakaoka H, Nakatani K, Inagaki M, Tsubakio-Yamamoto K, Masuda D, Nakagawa-Toyama Y, Nishida M, Ohmoto Y, Nishihara M, Komuro I, Yamashita S. Deletion of progranulin exacerbates atherosclerosis in ApoE knockout mice. Cardiovasc Res 2013; 100:125-33. [PMID: 23847387 DOI: 10.1093/cvr/cvt178] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
AIMS Progranulin (PGRN) is a multifunctional protein known to be involved in inflammation. However, the relation between PGRN and atherosclerosis remains elusive. The aim of this study was to define the role of PGRN in the development of atherosclerosis. METHODS AND RESULTS First, we checked the expression levels of PGRN in human atherosclerotic plaques. Immunohistochemical analysis showed that PGRN is strongly expressed in foam cells of atherosclerotic plaques. We also found that PGRN is expressed more abundantly in macrophages than in the smooth muscle cells of atherosclerotic lesions in ApoE(-/-) mice fed a high-fat diet for 12 weeks. Next, PGRN(-/-)ApoE(-/-) mice were generated to investigate the effect of PGRN on the development of atherosclerosis. PGRN(-/-)ApoE(-/-) mice exhibited severe atherosclerotic lesions compared with PGRN(+/+)ApoE(-/-) mice, despite their anti-atherogenic lipid profile. These results are partly due to enhanced expression of inflammatory cytokines, adhesion molecules, and decreased expression of endothelial nitric oxide synthase. In addition, lack of PGRN leads to accumulate excessive cholesterol in the macrophages and alter HDL-associated proteins. CONCLUSION PGRN seems to be involved in the pathogenesis of atherosclerosis, possibly by various anti-atherogenic effects, including modulation of local and/or systemic inflammation.
Collapse
Affiliation(s)
- Ryota Kawase
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
236
|
Zhao YP, Tian QY, Frenkel S, Liu CJ. The promotion of bone healing by progranulin, a downstream molecule of BMP-2, through interacting with TNF/TNFR signaling. Biomaterials 2013; 34:6412-21. [PMID: 23746860 DOI: 10.1016/j.biomaterials.2013.05.030] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 05/18/2013] [Indexed: 02/02/2023]
Abstract
Endochondral ossification plays a key role in the bone healing process, which requires normal cartilage callus formation. Progranulin (PGRN) growth factor is known to enhance chondrocyte differentiation and endochondral ossification during development, yet whether PGRN also plays a role in bone regeneration remains unknown. In this study we established surgically-induced bone defect and ectopic bone formation models based on genetically-modified mice. Thereafter, the bone healing process of those mice was analyzed through radiological assays including X-ray and micro CT, and morphological analysis including histology and immunohistochemistry. PGRN deficiency delayed bone healing, while recombinant PGRN enhanced bone regeneration. Moreover, PGRN was required for BMP-2 induction of osteoblastogenesis and ectopic bone formation. Furthermore, the role of PGRN in bone repair was mediated, at least in part, through interacting with TNF-α signaling pathway. PGRN-mediated bone formation depends on TNFR2 but not TNFR1, as PGRN promoted bone regeneration in deficiency of TNFR1 but lost such effect in TNFR2 deficient mice. PGRN blocked TNF-α-induced inflammatory osteoclastogenesis and protected BMP-2-mediated ectopic bone formation in TNF-α transgenic mice. Collectively, PGRN acts as a critical mediator of the bone healing process by constituting an interplay network with BMP-2 and TNF-α signaling, and this represents a potential molecular target for treatment of fractures, especially under inflammatory conditions.
Collapse
Affiliation(s)
- Yun-peng Zhao
- Department of Orthopaedic Surgery, New York University Medical Center, New York, NY 10003, USA
| | | | | | | |
Collapse
|
237
|
Toh H, Cao M, Daniels E, Bateman A. Expression of the growth factor progranulin in endothelial cells influences growth and development of blood vessels: a novel mouse model. PLoS One 2013; 8:e64989. [PMID: 23741441 PMCID: PMC3669103 DOI: 10.1371/journal.pone.0064989] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 04/19/2013] [Indexed: 12/24/2022] Open
Abstract
Progranulin is a secreted glycoprotein that regulates cell proliferation, migration and survival. It has roles in development, tumorigenesis, wound healing, neurodegeneration and inflammation. Endothelia in tumors, wounds and placenta express elevated levels of progranulin. In culture, progranulin activates endothelial proliferation and migration. This suggested that progranulin might regulate angiogenesis. It was, however, unclear how elevated endothelial progranulin levels influence vascular growth in vivo. To address this issue, we generated mice with progranulin expression targeted specifically to developing endothelial cells using a Tie2-promoter/enhancer construct. Three Tie2-Grn mouse lines were generated with varying Tie2-Grn copy number, and were called GrnLo, GrnMid, and GrnHi. All three lines showed increased mortality that correlates with Tie2-Grn copy number, with greatest mortality and lowest germline transmission in the GrnHi line. Death of the transgenic animals occurred around birth, and continued for three days after birth. Those that survived beyond day 3 survived into adulthood. Transgenic neonates that died showed vascular abnormalities of varying severity. Some exhibited bleeding into body cavities such as the pericardial space. Smaller localized hemorrhages were seen in many organs. Blood vessels were often dilated and thin-walled. To establish the development of these abnormalities, we examined mice at early (E10.5-14.5) and later (E15.5-17.5) developmental phases. Early events during vasculogenesis appear unaffected by Tie2-Grn as apparently normal primary vasculature had been established at E10.5. The earliest onset of vascular abnormality was at E15.5, with focal cerebral hemorrhage and enlarged vessels in various organs. Aberrant Tie2-Grn positive vessels showed thinning of the basement membrane and reduced investiture with mural cells. We conclude that progranulin promotes exaggerated vessel growth in vivo, with subsequent effects in the formation of the mural cell layer and weakening of vessel integrity. These results demonstrate that overexpression of progranulin in endothelial cells influences normal angiogenesis in vivo.
Collapse
Affiliation(s)
- Huishi Toh
- Division of Endocrinology and Metabolism, Department of Medicine, Royal Victoria Hospital, McGill University Health Center, Montreal, Quebec, Canada
| | - Mingju Cao
- Division of Endocrinology and Metabolism, Department of Medicine, Royal Victoria Hospital, McGill University Health Center, Montreal, Quebec, Canada
| | - Eugene Daniels
- Department of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Andrew Bateman
- Division of Endocrinology and Metabolism, Department of Medicine, Royal Victoria Hospital, McGill University Health Center, Montreal, Quebec, Canada
| |
Collapse
|
238
|
Qiu F, Song L, Ding F, Liu H, Shu Q, Yang N, Liu W, Li X. Expression level of the growth factor progranulin is related with development of systemic lupus erythematosus. Diagn Pathol 2013; 8:88. [PMID: 23702100 PMCID: PMC3680007 DOI: 10.1186/1746-1596-8-88] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 05/11/2013] [Indexed: 01/19/2023] Open
Abstract
Background This study is to investigate the expression of progranulin (PGRN) in systemic lupus erythematosus (SLE) patients and the effect of glucocorticoid (GC) treatment on its expression. Methods Thirty newly diagnosed severe SLE patients and 30 healthy subjects were enrolled in this study. The serum levels of PGRN and the inflammatory factors of SLE were detected by ELISA and the mRNA expression of these proteins were detected by real-time PCR. Results The serum levels of PGRN, IL-6, PR3, TNFR, TNF-α and anti-dsDNA antibody in SLE patients were increased significantly compared with healthy controls (P < 0.05). The relative expression of PGRN mRNA was increased by 4.88-fold in pre-treatment SLE patients compared with controls (P < 0.05). After prednisone treatment, the serum levels of PGRN decreased significantly, and the relative expression of PGRN mRNA was decreased by 1.34-fold compared with the untreated controls (P < 0.01). Moreover, Serum concentration of PGRN was correlated with serum levels of IL-6, TNF-α, TNFR and anti-dsDNA antibody in both pre-treatment and post-treatment SLE patients. Conclusions PGRN is up-regulated in the SLE patients and is correlated with pro-inflammatory cytokines and anti-dsDNA antibody. Glucocorticoids can down-regulate the expression of PGRN in SLE patients. Virtual slides http://www.diagnosticpathology.diagnomx.eu/vs/1562484036905973
Collapse
Affiliation(s)
- Feng Qiu
- Department of Rheumatology, Qilu Hospital, Shandong University, Jinan 250012, P R China.
| | | | | | | | | | | | | | | |
Collapse
|
239
|
Progranulin deficiency exaggerates, whereas progranulin-derived Atsttrin attenuates, severity of dermatitis in mice. FEBS Lett 2013; 587:1805-10. [PMID: 23669357 DOI: 10.1016/j.febslet.2013.04.037] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/23/2013] [Accepted: 04/23/2013] [Indexed: 01/31/2023]
Abstract
PGRN and its derived engineered protein, Atsttrin, were reported to antagonize TNFα and protect against inflammatory arthritis [Tang, W. et al. (2011) The growth factor progranulin binds to TNF receptors and is therapeutic against inflammatory arthritis in mice. Science 332 (6028) 478-484]. Here we found that PGRN level was also significantly elevated in skin inflammation. PGRN-/- mice exhibited more severe inflammation following induction of oxazolone (OXA). In contrast, recombinant Atsttrin protein effectively attenuated inflammation in mice dermatitis model. In addition, the protective role of PGRN and Atsttrin in dermatitis was probably due to their inhibition on NF-κB signaling. Collectively, PGRN, especially its derived engineered protein, Atsttrin, may represent a potential molecular target for prevention and treatment of inflammatory skin diseases.
Collapse
|
240
|
Pappalardo A, Pitto L, Fiorillo C, Alice Donati M, Bruno C, Santorelli FM. Neuromuscular disorders in zebrafish: state of the art and future perspectives. Neuromolecular Med 2013; 15:405-19. [PMID: 23584918 DOI: 10.1007/s12017-013-8228-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Accepted: 03/30/2013] [Indexed: 12/22/2022]
Abstract
Neuromuscular disorders are a broad group of inherited conditions affecting the structure and function of the motor system with polymorphic clinical presentation and disease severity. Although individually rare, collectively neuromuscular diseases have an incidence of 1 in 3,000 and represent a significant cause of disability of the motor system. The past decade has witnessed the identification of a large number of human genes causing muscular disorders, yet the underlying pathogenetic mechanisms remain largely unclear, limiting the developing of targeted therapeutic strategies. To overcome this barrier, model systems that replicate the different steps of human disorders are increasingly being developed. Among these, the zebrafish (Danio rerio) has emerged as an excellent organism for studying genetic disorders of the central and peripheral motor systems. In this review, we will encounter most of the available zebrafish models for childhood neuromuscular disorders, providing a brief overview of results and the techniques, mainly transgenesis and chemical biology, used for genetic manipulation. The amount of data collected in the past few years will lead zebrafish to became a common functional tool for assessing rapidly drug efficacy and off-target effects in neuromuscular diseases and, furthermore, to shed light on new etiologies emerging from large-scale massive sequencing studies.
Collapse
Affiliation(s)
- Andrea Pappalardo
- Molecular Medicine, and Neuromuscular Lab, IRCCS Stella Maris, Via dei Giacinti 2, 56128 Pisa, Italy
| | | | | | | | | | | |
Collapse
|
241
|
Kollmann K, Uusi-Rauva K, Scifo E, Tyynelä J, Jalanko A, Braulke T. Cell biology and function of neuronal ceroid lipofuscinosis-related proteins. Biochim Biophys Acta Mol Basis Dis 2013; 1832:1866-81. [PMID: 23402926 DOI: 10.1016/j.bbadis.2013.01.019] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 01/18/2013] [Accepted: 01/23/2013] [Indexed: 01/17/2023]
Abstract
Neuronal ceroid lipofuscinoses (NCL) comprise a group of inherited lysosomal disorders with variable age of onset, characterized by lysosomal accumulation of autofluorescent ceroid lipopigments, neuroinflammation, photoreceptor- and neurodegeneration. Most of the NCL-related genes encode soluble and transmembrane proteins which localize to the endoplasmic reticulum or to the endosomal/lysosomal compartment and directly or indirectly regulate lysosomal function. Recently, exome sequencing led to the identification of four novel gene defects in NCL patients and a new NCL nomenclature currently comprising CLN1 through CLN14. Although the precise function of most of the NCL proteins remains elusive, comprehensive analyses of model organisms, particularly mouse models, provided new insight into pathogenic mechanisms of NCL diseases and roles of mutant NCL proteins in cellular/subcellular protein and lipid homeostasis, as well as their adaptive/compensatorial regulation at the transcriptional level. This review summarizes the current knowledge on the expression, function and regulation of NCL proteins and their impact on lysosomal integrity. This article is part of a Special Issue entitled: The Neuronal Ceroid Lipofuscinoses or Batten Disease.
Collapse
Affiliation(s)
- Katrin Kollmann
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | | | | | | | | |
Collapse
|
242
|
Exacerbated inflammatory responses related to activated microglia after traumatic brain injury in progranulin-deficient mice. Neuroscience 2013. [DOI: 10.1016/j.neuroscience.2012.11.032] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
243
|
Li YH, Chen HY, Li YW, Wu SY, Wangta-Liu, Lin GH, Hu SY, Chang ZK, Gong HY, Liao CH, Chiang KY, Huang CW, Wu JL. Progranulin regulates zebrafish muscle growth and regeneration through maintaining the pool of myogenic progenitor cells. Sci Rep 2013; 3:1176. [PMID: 23378909 PMCID: PMC3560382 DOI: 10.1038/srep01176] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 01/09/2013] [Indexed: 11/20/2022] Open
Abstract
Myogenic progenitor cell (MPC) is responsible for postembryonic muscle growth and regeneration. Progranulin (PGRN) is a pluripotent growth factor that is correlated with neuromuscular disease, which is characterised by denervation, leading to muscle atrophy with an abnormal quantity and functional ability of MPC. However, the role of PGRN in MPC biology has yet to be elucidated. Here, we show that knockdown of zebrafish progranulin A (GrnA) resulted in a reduced number of MPC and impaired muscle growth. The decreased number of Pax7-positive MPCs could be restored by the ectopic expression of GrnA or MET. We further confirmed the requirement of GrnA in MPC activation during muscle regeneration by knockdown and transgenic line with muscle-specific overexpression of GrnA. In conclusion, we demonstrate a critical role for PGRN in the maintenance of MPC and suggest that muscle atrophy under PGRN loss may begin with MPC during postembryonic myogenesis.
Collapse
Affiliation(s)
- Yen-Hsing Li
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
244
|
Nguyen AD, Nguyen TA, Cenik B, Yu G, Herz J, Walther TC, Davidson WS, Farese RV. Secreted progranulin is a homodimer and is not a component of high density lipoproteins (HDL). J Biol Chem 2013; 288:8627-8635. [PMID: 23364791 DOI: 10.1074/jbc.m112.441949] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Progranulin is a secreted glycoprotein, and the GRN gene is mutated in some cases of frontotemporal dementia. Progranulin has also been implicated in cell growth, wound healing, inflammation, and cancer. We investigated the molecular nature of secreted progranulin and provide evidence that progranulin exists as a homodimer. Although recombinant progranulin has a molecular mass of ∼85 kDa by SDS-PAGE, it elutes in fractions corresponding to ∼170-180 kDa by gel-filtration chromatography. Additionally, recombinant progranulin can be intermolecularly cross-linked, yielding a complex corresponding to a dimer (∼180 kDa), and progranulins containing different epitope tags physically interact. In plasma, progranulin similarly forms complexes of ∼180-190 kDa. Although progranulin partially co-fractionated with high density lipoproteins (HDL) by gel-filtration chromatography, we found no evidence that progranulin in mouse or human plasma is a component of HDL either by ultracentrifugation or by lipid binding assays. We conclude that circulating progranulin exists as a dimer and is not likely a component of HDL.
Collapse
Affiliation(s)
- Andrew D Nguyen
- Gladstone Institute of Cardiovascular Disease, San Francisco, California 94158
| | - Thi A Nguyen
- Gladstone Institute of Cardiovascular Disease, San Francisco, California 94158
| | - Basar Cenik
- Department of Molecular Genetics, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390; Department of Neuroscience, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390
| | - Gang Yu
- Department of Neuroscience, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390
| | - Joachim Herz
- Department of Molecular Genetics, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390; Department of Neuroscience, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390
| | - Tobias C Walther
- Department of Cell Biology, Yale School of Medicine, New Haven, Connecticut 06520
| | - W Sean Davidson
- Center for Lipid and Arteriosclerosis Science, University of Cincinnati, Cincinnati, Ohio 45237
| | - Robert V Farese
- Gladstone Institute of Cardiovascular Disease, San Francisco, California 94158,; Departments of Medicine and Biochemistry and Biophysics, University of California, San Francisco, California 94158.
| |
Collapse
|
245
|
Chang KH, Chen CM, Chen YC, Hsiao YC, Huang CC, Kuo HC, Hsu HC, Lee-Chen GJ, Wu YR. Association between GRN rs5848 polymorphism and Parkinson's disease in Taiwanese population. PLoS One 2013; 8:e54448. [PMID: 23342160 PMCID: PMC3546937 DOI: 10.1371/journal.pone.0054448] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 12/11/2012] [Indexed: 12/22/2022] Open
Abstract
A single nucleotide polymorphism GRN rs5848 (3'UTR+78 C>T) was reported to alter the risk for frontotemporal lobar degeneration. Herein, we investigated the effect of GRN rs5848 on the risk of Parkinson's disease (PD) by genotyping 573 Taiwanese patients with PD and 490 age-matched control subjects. Compared to subjects with CC genotype, those with TT genotype had a 1.58-fold increased risk of PD (95% CI: 1.77∼2.34, P = 0.021). PD patients demonstrate a higher frequency of T allele (37.2%) than controls (32.2%; odds ratio [OR] = 1.24, 95% CI: 1.04∼1.49, P = 0.017). This susceptibility was particularly observed in female subjects, in which TT genotype had a 2.16-fold increased risk of PD as compared with controls(95% CI: 1.24∼3.78, P = 0.006). The frequency of T allele (39.3%) in female PD patients was higher than in female control subjects (31.1%; OR = 1.43, CI: 1.11∼1.87, P = 0.007). No association was observed between GRN rs5848 and susceptibility in male subjects. These findings show that the GRN rs5848 TT genotype and T allele are risk factors for female Taiwanese patients with PD.
Collapse
Affiliation(s)
- Kuo-Hsuan Chang
- Department of Neurology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taipei, Taiwan
| | | | | | | | | | | | | | | | | |
Collapse
|
246
|
Abstract
Here, we provide a comprehensive review of current findings concerning the biochemistry and physiological functions of ADAMTS7, a metalloprotease that is known to interact with cartilage oligomeric matrix protein, progranulin, and alpha2-macroglobulin. Such broad substrate specificity and potentially diverse physiological functions make ADAMTS7 an interesting enzyme to study. ADAMTS7 has been shown to play a role in the pathogenesis of arthritis and disc disorders. More recently, the ADAMTS7 locus is identified to have a strong association with coronary atherosclerotic disease. However, the role of ADAMTS7 in the development of atherosclerosis is yet to be determined. The development of an easy and high throughput assay for ADAMTS7 activity and appropriate animal models will allow us to uncover the novel mechanisms of coronary arterial disease.
Collapse
Affiliation(s)
- Hayley A Hanby
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and The University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | | |
Collapse
|
247
|
Kleinberger G, Capell A, Haass C, Van Broeckhoven C. Mechanisms of granulin deficiency: lessons from cellular and animal models. Mol Neurobiol 2012; 47:337-60. [PMID: 23239020 PMCID: PMC3538123 DOI: 10.1007/s12035-012-8380-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 11/14/2012] [Indexed: 12/12/2022]
Abstract
The identification of causative mutations in the (pro)granulin gene (GRN) has been a major breakthrough in the research on frontotemporal dementia (FTD). So far, all FTD-associated GRN mutations are leading to neurodegeneration through a “loss-of-function” mechanism, encouraging researchers to develop a growing number of cellular and animal models for GRN deficiency. GRN is a multifunctional secreted growth factor, and loss of its function can affect different cellular processes. Besides loss-of-function (i.e., mostly premature termination codons) mutations, which cause GRN haploinsufficiency through reduction of GRN expression, FTD-associated GRN missense mutations have also been identified. Several of these missense mutations are predicted to increase the risk of developing neurodegenerative diseases through altering various key biological properties of GRN-like protein secretion, proteolytic processing, and neurite outgrowth. With the use of cellular and animal models for GRN deficiency, the portfolio of GRN functions has recently been extended to include functions in important biological processes like energy and protein homeostasis, inflammation as well as neuronal survival, neurite outgrowth, and branching. Furthermore, GRN-deficient animal models have been established and they are believed to be promising disease models as they show accelerated aging and recapitulate at least some neuropathological features of FTD. In this review, we summarize the current knowledge on the molecular mechanisms leading to GRN deficiency and the lessons we learned from the established cellular and animal models. Furthermore, we discuss how these insights might help in developing therapeutic strategies for GRN-associated FTD.
Collapse
Affiliation(s)
- Gernot Kleinberger
- Neurodegenerative Brain Diseases Group, VIB Department of Molecular Genetics, University of Antwerp-CDE, Universiteitsplein 1, Antwerp, 2610, Belgium
| | | | | | | |
Collapse
|
248
|
Tanaka A, Tsukamoto H, Mitoma H, Kiyohara C, Ueda N, Ayano M, Ohta SI, Inoue Y, Arinobu Y, Niiro H, Horiuchi T, Akashi K. Serum progranulin levels are elevated in patients with systemic lupus erythematosus, reflecting disease activity. Arthritis Res Ther 2012; 14:R244. [PMID: 23140401 PMCID: PMC3674629 DOI: 10.1186/ar4087] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 11/09/2012] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION Progranulin (PGRN) is the precursor of granulin (GRN), a soluble cofactor for toll-like receptor 9 (TLR9) signaling evoked by oligonucleotide (CpG)-DNA. Because TLR9 signaling plays an important role in systemic lupus erythematosus (SLE), we investigated whether PGRN is involved in the pathogenesis of SLE. METHODS We measured concentrations of serum PGRN and interleukin-6 (IL-6) with enzyme-linked immunosorbent assay (ELISA) in patients with SLE (n = 68) and in healthy controls (n = 60). We assessed the correlation between the serum PGRN levels and established disease-activity indexes. The sera from the patients with high PGRN titers (>80 ng/ml) at the initial evaluation were reevaluated after the disease was ameliorated by treatment. We also measured the IL-6 concentration secreted by peripheral blood mononuclear cells (PBMCs) incubated with (a) oligonucleotide (CpG-B) in the presence or absence of recombinant human PGRN (rhPGRN); and (b) lupus sera in the presence or absence of a neutralizing anti-PGRN antibody. RESULTS Serum PGRN levels were significantly higher in SLE patients than healthy controls. Their levels were significantly associated with activity of clinical symptoms. They also significantly correlated with values of clinical parameters, including the SLE Disease Activity Index and anti-double-stranded DNA antibody titers, and inversely with CH50, C3, and C4 levels. Moreover, serum PGRN levels significantly decreased after successful treatment of SLE. The rhPGRN significantly upregulated the production of IL-6 by PBMCs stimulated with CpG-B. Patients' sera stimulated production of IL-6 from PBMCs, which was significantly impaired by neutralization of PGRN. The serum PGRN levels significantly correlated with the serum IL-6 levels. CONCLUSIONS Serum PGRN could be a useful biomarker for disease activity of SLE. PGRN may be involved in the pathogenesis of SLE partly by enhancing the TLR9 signaling.
Collapse
|
249
|
Lim HY, Albuquerque B, Häussler A, Myrczek T, Ding A, Tegeder I. Progranulin contributes to endogenous mechanisms of pain defense after nerve injury in mice. J Cell Mol Med 2012; 16:708-21. [PMID: 21645236 PMCID: PMC3822842 DOI: 10.1111/j.1582-4934.2011.01350.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Progranulin haploinsufficiency is associated with frontotemporal dementia in humans. Deficiency of progranulin led to exaggerated inflammation and premature aging in mice. The role of progranulin in adaptations to nerve injury and neuropathic pain are still unknown. Here we found that progranulin is up-regulated after injury of the sciatic nerve in the mouse ipsilateral dorsal root ganglia and spinal cord, most prominently in the microglia surrounding injured motor neurons. Progranulin knockdown by continuous intrathecal spinal delivery of small interfering RNA after sciatic nerve injury intensified neuropathic pain-like behaviour and delayed the recovery of motor functions. Compared to wild-type mice, progranulin-deficient mice developed more intense nociceptive hypersensitivity after nerve injury. The differences escalated with aging. Knockdown of progranulin reduced the survival of dissociated primary neurons and neurite outgrowth, whereas addition of recombinant progranulin rescued primary dorsal root ganglia neurons from cell death induced by nerve growth factor withdrawal. Thus, up-regulation of progranulin after neuronal injury may reduce neuropathic pain and help motor function recovery, at least in part, by promoting survival of injured neurons and supporting regrowth. A deficiency in this mechanism may increase the risk for injury-associated chronic pain.
Collapse
Affiliation(s)
- Hee-Young Lim
- Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany
| | | | | | | | | | | |
Collapse
|
250
|
Jian J, Konopka J, Liu C. Insights into the role of progranulin in immunity, infection, and inflammation. J Leukoc Biol 2012; 93:199-208. [PMID: 23089745 DOI: 10.1189/jlb.0812429] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PGRN, a pleiotrophic growth factor, is known to play an important role in the maintenance and regulation of the homeostatic dynamics of normal tissue development, proliferation, regeneration, and the host-defense response and therefore, has been widely studied in the fields of infectious diseases, wound healing, tumorigenesis, and neuroproliferative and degenerative diseases. PGRN has also emerged as a multifaceted immune-regulatory molecule through regulating the signaling pathways known to be critical for immunology, especially TNF/TNFR signaling. In this review, we start with updates about the interplays of PGRN with ECM proteins, proteolytic enzymes, inflammatory cytokines, and cell-surface receptors, as well as various pathophysiological processes involved. We then review the data supporting an emerging role of PGRN in the fields of the "Cubic of I", namely, immunity, infection, and inflammation, with special focus on its regulation of autoimmune syndromes. We conclude with insights into the immunomodulating, anti-inflammatory, therapeutic potential of PGRN in treating diseases with an inflammatory etiology in a vast range of medical specialties.
Collapse
Affiliation(s)
- Jinlong Jian
- Department of Orthopaedic Surgery, New York University Medical Center, New York, New York 10003, USA
| | | | | |
Collapse
|