851
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Browne G, Taipaleenmäki H, Bishop NM, Madasu SC, Shaw LM, van Wijnen AJ, Stein JL, Stein GS, Lian JB. Runx1 is associated with breast cancer progression in MMTV-PyMT transgenic mice and its depletion in vitro inhibits migration and invasion. J Cell Physiol 2015; 230:2522-32. [PMID: 25802202 DOI: 10.1002/jcp.24989] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 03/16/2015] [Indexed: 01/12/2023]
Abstract
Runx1 is a transcription factor essential for definitive hematopoiesis, and genetic abnormalities in Runx1 cause leukemia. Runx1 is functionally promiscuous and acts as either an oncogene or tumor suppressor gene in certain epithelial cancers. Recent evidence suggests that Runx1 is an important factor in breast cancer, however, its role remains ambiguous. Here, we addressed whether Runx1 has a specific pathological role during breast cancer progression and show that Runx1 has an oncogenic function. We observed elevated Runx1 expression in a subset of human breast cancers. Furthermore, throughout the course of disease progression in a classical mouse model of breast cancer (i.e., the MMTV-PyMT transgenic model), Runx1 expression increases in the primary site (mammary gland) and is further upregulated in tumors and distal lung metastatic lesions. Ex vivo studies using tumor epithelial cells derived from these mice express significantly higher levels of Runx1 than normal mammary epithelial cells. The tumor cells exhibit increased rates of migration and invasion, indicative of an aggressive cancer phenotype. Inhibition of Runx1 expression using RNA interference significantly abrogates these cancer-relevant phenotypic characteristics. Importantly, our data establish that Runx1 contributes to murine mammary tumor development and malignancy and potentially represents a key disease-promoting and prognostic factor in human breast cancer progression and metastasis.
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Affiliation(s)
- Gillian Browne
- Department of Biochemistry and Vermont Cancer Center, University of Vermont College of Medicine, Burlington, Vermont.,Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Hanna Taipaleenmäki
- Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts.,Heisenberg-Group for Molecular Skeletal Biology, Department of Trauma, Hand & Reconstructive Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicole M Bishop
- Microscopy Imaging Center, University of Vermont College of Medicine, Burlington, Vermont
| | - Sharath C Madasu
- Department of Biochemistry and Vermont Cancer Center, University of Vermont College of Medicine, Burlington, Vermont
| | - Leslie M Shaw
- Department of Cancer Biology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Andre J van Wijnen
- Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts.,Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Janet L Stein
- Department of Biochemistry and Vermont Cancer Center, University of Vermont College of Medicine, Burlington, Vermont.,Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Gary S Stein
- Department of Biochemistry and Vermont Cancer Center, University of Vermont College of Medicine, Burlington, Vermont.,Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Jane B Lian
- Department of Biochemistry and Vermont Cancer Center, University of Vermont College of Medicine, Burlington, Vermont.,Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts
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852
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KASOJU N, KUBIES D, FÁBRYOVÁ E, KŘÍŽ J, KUMOREK MM, STICOVÁ E, RYPÁČEK F. In Vivo Vascularization of Anisotropic Channeled Porous Polylactide-Based Capsules for Islet Transplantation: The Effects of Scaffold Architecture and Implantation Site. Physiol Res 2015; 64:S75-84. [DOI: 10.33549/physiolres.933138] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The replacement of pancreatic islets for the possible treatment of type 1 diabetes is limited by the extremely high oxygen demand of the islets. To this end, here we hypothesize to create a novel extra-hepatic highly-vascularized bioartificial cavity using a porous scaffold as a template and using the host body as a living bioreactor for subsequent islet transplantation. Polylactide-based capsular-shaped anisotropic channeled porous scaffolds were prepared by following the unidirectional thermally-induced phase separation technique, and were implanted under the skin and in the greater omentum of Brown Norway rats. Polyamide mesh-based isotropic regular porous capsules were used as the controls. After 4weeks, the implants were excised and analyzed by histology. The hematoxylin and eosin, as well as Masson's trichrome staining, revealed a) low or no infiltration of giant inflammatory cells in the implant, b) minor but insignificant fibrosis around the implant, c) guided infiltration of host cells in the test capsule in contrast to random cell infiltration in the control capsule, and d) relatively superior cell infiltration in the capsules implanted in the greater omentum than in the capsules implanted under the skin. Furthermore, the anti-CD31 immunohistochemistry staining revealed numerous vessels at the implant site, but mostly on the external surface of the capsules. Taken together, the current study, the first of its kind, is a significant step-forward towards engineering a bioartificial microenvironment for the transplantation of islets.
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Affiliation(s)
- N. KASOJU
- Department of Biomaterials and Bioanalogous Polymer Systems, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - D. KUBIES
- Department of Biomaterials and Bioanalogous Polymer Systems, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | | | - J. KŘÍŽ
- Department of Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
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853
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Yeap SK, Abu N, Mohamad NE, Beh BK, Ho WY, Ebrahimi S, Yusof HM, Ky H, Tan SW, Alitheen NB. Chemopreventive and immunomodulatory effects of Murraya koenigii aqueous extract on 4T1 breast cancer cell-challenged mice. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:306. [PMID: 26335427 PMCID: PMC4559205 DOI: 10.1186/s12906-015-0832-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 08/26/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND The progression of breast cancer is increasing at an alarming rate, particularly in western countries. Meanwhile, the lower incidence in Asian countries could be attributed to the heavy incorporation of green leaves vegetables or spices in their diets. Murraya koenigii (MK) or often times known as curry leaves are common spice used mostly in tropical countries. Anti-inflammatory and chemopreventive effects of MK aqueous extract on 4T1 breast cancer cell-challenged mice were evaluated. METHODS Herein, cytotoxic activity of MK was first tested on 4T1 cells in vitroby MTT assay. Then, in vivo chemopreventive study was conducted where mice were fed with extracts prior to and after inducing the tumor (inoculation). Tumor size was monitored post-4T1 inoculation. At the end of experiment, histopathology of tumor sections, T cell immunophenotyping, tumor nitric oxide level, serum cytokine level and qPCR analysis on expression of iNOS, iCAM, NF-kB and c-MYC were performed. RESULTS MK reduced the tumors' size and lung metastasis aside from inhibited the viability of 4T1 cells in vitro. Furthermore, it decreased the level of nitric oxide and inflammation-related cytokines and genes, including iNOS, iCAM, NF-kB and c-MYC. CONCLUSION The results propose that, MK managed to inhibit the progression of tumor via immunostimulatory effect and inflammatory reaction within the tumor samples. This suggests that MKconsumption could be a savior in the search of new chemopreventive agents.
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854
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Mai V, Ukhanova M, Reinhard MK, Li M, Sulakvelidze A. Bacteriophage administration significantly reduces Shigella colonization and shedding by Shigella-challenged mice without deleterious side effects and distortions in the gut microbiota. BACTERIOPHAGE 2015; 5:e1088124. [PMID: 26909243 PMCID: PMC4745833 DOI: 10.1080/21597081.2015.1088124] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 12/14/2022]
Abstract
We used a mouse model to establish safety and efficacy of a bacteriophage cocktail, ShigActive™, in reducing fecal Shigella counts after oral challenge with a susceptible strain. Groups of inbred C57BL/6J mice challenged with Shigella sonnei strain S43-NalAcR were treated with a phage cocktail (ShigActive™) composed of 5 lytic Shigella bacteriophages and ampicillin. The treatments were administered (i) 1 h after, (ii) 3 h after, (iii) 1 h before and after, and (iv) 1 h before bacterial challenge. The treatment regimens elicited a 10- to 100-fold reduction in the CFU's of the challenge strain in fecal and cecum specimens compared to untreated control mice, (P < 0.05). ShigActiveTM treatment was at least as effective as treatment with ampicillin but had a significantly less impact on the gut microbiota. Long-term safety studies did not identify any side effects or distortions in overall gut microbiota associated with bacteriophage administration. Shigella phages may be therapeutically effective in a “classical phage therapy” approach, at least during the early stages after Shigella ingestion. Oral prophylactic “phagebiotic” administration of lytic bacteriophages may help to maintain a healthy gut microbiota by killing specifically targeted bacterial pathogens in the GI tract, without deleterious side effects and without altering the normal gut microbiota.
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Affiliation(s)
- Volker Mai
- Department of Epidemiology and Emerging Pathogens Institute; University of Florida ; Gainesville, FL USA
| | - Maria Ukhanova
- Department of Epidemiology and Emerging Pathogens Institute; University of Florida ; Gainesville, FL USA
| | - Mary K Reinhard
- Department of Pathology; University of Florida ; Gainesville, FL USA
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855
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Jiang J, Carlson MA, Teusink MJ, Wang H, MacEwan MR, Xie J. Expanding Two-Dimensional Electrospun Nanofiber Membranes in the Third Dimension By a Modified Gas-Foaming Technique. ACS Biomater Sci Eng 2015; 1:991-1001. [DOI: 10.1021/acsbiomaterials.5b00238] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | | | | | | | - Matthew R. MacEwan
- Department
of Neurosurgery, Washington University School of Medicine, Saint Louis, Missouri 63110, United States
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856
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Ming H, Lan Y, He F, Xiao X, Zhou X, Zhang Z, Li P, Huang G. Cytochrome b5 reductase 2 suppresses tumor formation in nasopharyngeal carcinoma by attenuating angiogenesis. CHINESE JOURNAL OF CANCER 2015; 34:459-67. [PMID: 26275421 PMCID: PMC4593386 DOI: 10.1186/s40880-015-0044-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 05/13/2015] [Indexed: 01/25/2023]
Abstract
Background Cytochrome b5 reductase 2 (CYB5R2) is a potential tumor suppressor that inhibits cell proliferation and motility in nasopharyngeal carcinoma (NPC). Inactivation of CYB5R2 is associated with lymph node metastasis in NPC. This study aimed to explore the mechanisms contributing to the anti-neoplastic effects of CYB5R2. Methods Polymerase chain reaction (PCR) assays were used to analyze the transcription of 84 genes known to be involved in representative cancer pathways in the NPC cell line HONE1. NPC cell lines CNE2 and HONE1 were transiently transfected with CYB5R2, and data was validated by real-time PCR. A chick chorioallantoic membrane (CAM) embryo model was implanted with CYB5R2-expressing CNE2 and HONE1 cells to evaluate the effect of CYB5R2 on angiogenesis. An immunohistochemical assay of the CAM model was used to analyze the protein expression of vascular endothelial growth factor (VEGF). Results In CYB5R2-transfected NPC cells, PCR assays revealed up-regulated mRNA levels of Fas cell surface death receptor (FAS), FBJ murine osteosarcoma viral oncogene homolog (FOS), phosphoinositide-3-kinase regulatory subunit 1 (PIK3R1), integrin beta 3 (ITGB3), metastasis suppressor 1 (MTSS1), interferon beta 1 (IFNB1), and cyclin-dependent kinase inhibitor 2A (CDKN2A) and down-regulated levels of integrin beta 5 (ITGB5), insulin-like growth factor 1 (IGF1), TEK tyrosine kinase (TEK), transforming growth factor beta receptor 1 (TGFBR1), and VEGF. The angiogenesis in the CAM model implanted with CYB5R2-transfected NPC cells was inhibited. Down-regulation of VEGF by CYB5R2 in NPC cells was confirmed by immunohistochemical staining in the CAM model. Conclusion CYB5R2 up-regulates the expression of genes that negatively modulate angiogenesis in NPC cells and down-regulates the expression of VEGF to reduce angiogenesis, thereby suppressing tumor formation.
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Affiliation(s)
- Huixin Ming
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Ying Lan
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Feng He
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Xue Xiao
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Xiaoying Zhou
- Medical Research Centre, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Zhe Zhang
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Ping Li
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Guangwu Huang
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
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857
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Hedberg-Buenz A, Christopher MA, Lewis CJ, Meyer KJ, Rudd DS, Dutca LM, Wang K, Garvin MK, Scheetz TE, Abràmoff MD, Harper MM, Anderson MG. RetFM-J, an ImageJ-based module for automated counting and quantifying features of nuclei in retinal whole-mounts. Exp Eye Res 2015; 146:386-392. [PMID: 26283021 DOI: 10.1016/j.exer.2015.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 07/28/2015] [Indexed: 01/28/2023]
Abstract
The present article introduces RetFM-J, a semi-automated ImageJ-based module that detects, counts, and collects quantitative data on nuclei of the inner retina from H&E-stained whole-mounted retinas. To illustrate performance, computer-derived outputs were analyzed in inbred C57BL/6J mice. Automated characterization yielded computer-derived outputs that closely matched manual counts. As a method using open-source software that is freely available, inexpensive staining reagents that are robust, and imaging equipment that is routine to most laboratories, RetFM-J could be utilized in a wide variety of experiments benefiting from high-throughput, quantitative, uniform analyses of total cellularity in the inner retina.
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Affiliation(s)
- Adam Hedberg-Buenz
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Mark A Christopher
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Carly J Lewis
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Kacie J Meyer
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA
| | - Danielle S Rudd
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA
| | - Laura M Dutca
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - Kai Wang
- Department of Biostatistics, University of Iowa, Iowa City, IA 52242, USA
| | - Mona K Garvin
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Todd E Scheetz
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA; Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - Michael D Abràmoff
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA; Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA 52242, USA; Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Matthew M Harper
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - Michael G Anderson
- VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA; Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA; Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA 52242, USA.
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858
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Mazzilli SA, Hershberger PA, Reid ME, Bogner PN, Atwood K, Trump DL, Johnson CS. Vitamin D Repletion Reduces the Progression of Premalignant Squamous Lesions in the NTCU Lung Squamous Cell Carcinoma Mouse Model. Cancer Prev Res (Phila) 2015; 8:895-904. [PMID: 26276745 DOI: 10.1158/1940-6207.capr-14-0403] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 07/20/2015] [Indexed: 12/14/2022]
Abstract
The chemopreventive actions of vitamin D were examined in the N-nitroso-tris-chloroethylurea (NTCU) mouse model, a progressive model of lung squamous cell carcinoma (SCC). SWR/J mice were fed a deficient diet (D) containing no vitamin D3, a sufficient diet (S) containing 2,000 IU/kg vitamin D3, or the same diets in combination with the active metabolite of vitamin D, calcitriol (C; 80 μg/kg, weekly). The percentage (%) of the mucosal surface of large airways occupied by dysplastic lesions was determined in mice after treatment with a total dose of 15 or 25 μmol NTCU (N). After treatment with 15 μmol NTCU, the percentages of the surface of large airways containing high-grade dysplastic (HGD) lesions were vitamin D-deficient + NTCU (DN), 22.7% [P < 0.05 compared with vitamin D-sufficient +NTCU (SN)]; DN + C, 12.3%; SN, 8.7%; and SN + C, 6.6%. The extent of HGD increased with NTCU dose in the DN group. Proliferation, assessed by Ki-67 labeling, increased upon NTCU treatment. The highest Ki-67 labeling index was seen in the DN group. As compared with SN mice, DN mice exhibited a three-fold increase (P < 0.005) in circulating white blood cells (WBC), a 20% (P < 0.05) increase in IL6 levels, and a four-fold (P < 0.005) increase in WBC in bronchial lavages. Thus, vitamin D repletion reduces the progression of premalignant lesions, proliferation, and inflammation, and may thereby suppress development of lung SCC. Further investigations of the chemopreventive effects of vitamin D in lung SCC are warranted.
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Affiliation(s)
- Sarah A Mazzilli
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York.
| | - Pamela A Hershberger
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York
| | - Mary E Reid
- Department of Medicine, Roswell Park Cancer Institute, Buffalo, New York
| | - Paul N Bogner
- Department of Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - Kristopher Atwood
- Department of Biostatistics, Roswell Park Cancer Institute, Buffalo New York
| | | | - Candace S Johnson
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York
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859
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Li N, Parrish M, Chan TK, Yin L, Rai P, Yoshiyuki Y, Abolhassani N, Tan KB, Kiraly O, Chow VTK, Engelward BP. Influenza infection induces host DNA damage and dynamic DNA damage responses during tissue regeneration. Cell Mol Life Sci 2015; 72:2973-88. [PMID: 25809161 PMCID: PMC4802977 DOI: 10.1007/s00018-015-1879-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 02/18/2015] [Accepted: 03/02/2015] [Indexed: 12/19/2022]
Abstract
Influenza viruses account for significant morbidity worldwide. Inflammatory responses, including excessive generation of reactive oxygen and nitrogen species (RONS), mediate lung injury in severe influenza infections. However, the molecular basis of inflammation-induced lung damage is not fully understood. Here, we studied influenza H1N1 infected cells in vitro, as well as H1N1 infected mice, and we monitored molecular and cellular responses over the course of 2 weeks in vivo. We show that influenza induces DNA damage to both, when cells are directly exposed to virus in vitro (measured using the comet assay) and also when cells are exposed to virus in vivo (estimated via γH2AX foci). We show that DNA damage, as well as responses to DNA damage persist in vivo until long after virus has been cleared, at times when there are inflammation associated RONS (measured by xanthine oxidase activity and oxidative products). The frequency of lung epithelial and immune cells with increased γH2AX foci is elevated in vivo, especially for dividing cells (Ki-67-positive) exposed to oxidative stress during tissue regeneration. Additionally, we observed a significant increase in apoptotic cells as well as increased levels of DNA double strand break (DSB) repair proteins Ku70, Ku86 and Rad51 during the regenerative phase. In conclusion, results show that influenza induces DNA damage both in vitro and in vivo, and that DNA damage responses are activated, raising the possibility that DNA repair capacity may be a determining factor for tissue recovery and disease outcome.
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Affiliation(s)
- Na Li
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
- Department of Microbiology, National University of Singapore, 5 Science Drive 2, Blk MD4, Level 3, Singapore, 117545 Singapore
| | - Marcus Parrish
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., 16-743, Cambridge, MA 02139 USA
| | - Tze Khee Chan
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, Clinical Research Center, MD11, 10 Medical Drive, Level 5, #05-09, Singapore, 117597 Singapore
| | - Lu Yin
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
| | - Prashant Rai
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
- Department of Microbiology, National University of Singapore, 5 Science Drive 2, Blk MD4, Level 3, Singapore, 117545 Singapore
| | - Yamada Yoshiyuki
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
| | - Nona Abolhassani
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., 16-743, Cambridge, MA 02139 USA
| | - Kong Bing Tan
- Department of Pathology, Yong loo Lin School of Medicine, National University Health System and National University of Singapore, Lower Kent Ridge Road, Singapore, 119074 Singapore
| | - Orsolya Kiraly
- Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-10/11 Innovation Wing, #03-12/13/14 Enterprise Wing, Singapore, 138602 Singapore
| | - Vincent T. K. Chow
- Department of Microbiology, National University of Singapore, 5 Science Drive 2, Blk MD4, Level 3, Singapore, 117545 Singapore
| | - Bevin P. Engelward
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., 16-743, Cambridge, MA 02139 USA
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860
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Tong X, He S, Chen J, Hu H, Xiang Z, Lu C, Dai F. A novel laminin β gene BmLanB1-w regulates wing-specific cell adhesion in silkworm, Bombyx mori. Sci Rep 2015. [PMID: 26212529 PMCID: PMC4515764 DOI: 10.1038/srep12562] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Laminins are important basement membrane (BM) components with crucial roles in development. The numbers of laminin isoforms in various organisms are determined by the composition of the different α, β, and γ chains, and their coding genes, which are variable across spieces. In insects, only two α, one β, and one γ chains have been identified thus far. Here, we isolated a novel laminin β gene, BmLanB1-w, by positional cloning of the mutant (crayfish, cf) with blistered wings in silkworm. Gene structure analysis showed that a 2 bp deletion of the BmLanB1-w gene in the cf mutant caused a frame-shift in the open reading frame (ORF) and generated a premature stop codon. Knockdown of the BmLanB1-w gene produced individuals exhibiting blistered wings, indicating that this laminin gene was required for cell adhesion during wing development. We also identified laminin homologs in different species and showed that two copies of β laminin likely originated in Lepidoptera during evolution. Furthermore, phylogenetic and gene expression analyses of silkworm laminin genes revealed that the BmLanB1-w gene is newly evolved, and is required for wing-specific cell adhesion. This is the first report showing the tissue specific distribution and functional differentiation of β laminin in insects.
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Affiliation(s)
- Xiaoling Tong
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Songzhen He
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Jun Chen
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Hai Hu
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Zhonghuai Xiang
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Cheng Lu
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Fangyin Dai
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
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861
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Li T, Wang YN, Khokhlova TD, D'Andrea S, Starr F, Chen H, McCune JS, Risler LJ, Mashadi-Hossein A, Hingorani SR, Chang A, Hwang JH. Pulsed High-Intensity Focused Ultrasound Enhances Delivery of Doxorubicin in a Preclinical Model of Pancreatic Cancer. Cancer Res 2015. [PMID: 26216548 DOI: 10.1158/0008-5472.can-15-0296] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pancreatic cancer is characterized by extensive stromal desmoplasia, which decreases blood perfusion and impedes chemotherapy delivery. Breaking the stromal barrier could both increase perfusion and permeabilize the tumor, enhancing chemotherapy penetration. Mechanical disruption of the stroma can be achieved using ultrasound-induced bubble activity-cavitation. Cavitation is also known to result in microstreaming and could have the added benefit of actively enhancing diffusion into the tumors. Here, we report the ability to enhance chemotherapeutic drug doxorubicin penetration using ultrasound-induced cavitation in a genetically engineered mouse model (KPC mouse) of pancreatic ductal adenocarcinoma. To induce localized inertial cavitation in pancreatic tumors, pulsed high-intensity focused ultrasound (pHIFU) was used either during or before doxorubicin administration to elucidate the mechanisms of enhanced drug delivery (active vs. passive drug diffusion). For both types, the pHIFU exposures that were associated with high cavitation activity resulted in disruption of the highly fibrotic stromal matrix and enhanced the normalized doxorubicin concentration by up to 4.5-fold compared with controls. Furthermore, normalized doxorubicin concentration was associated with the cavitation metrics (P < 0.01), indicating that high and sustained cavitation results in increased chemotherapy penetration. No significant difference between the outcomes of the two types, that is, doxorubicin infusion during or after pHIFU treatment, was observed, suggesting that passive diffusion into previously permeabilized tissue is the major mechanism for the increase in drug concentration. Together, the data indicate that pHIFU treatment of pancreatic tumors when resulting in high and sustained cavitation can efficiently enhance chemotherapy delivery to pancreatic tumors. .
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Affiliation(s)
- Tong Li
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington
| | - Yak-Nam Wang
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington
| | - Tatiana D Khokhlova
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, Washington
| | - Samantha D'Andrea
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, Washington
| | - Frank Starr
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington
| | - Hong Chen
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington
| | - Jeannine S McCune
- Department of Pharmacy, University of Washington, Seattle, Washington. Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - Linda J Risler
- Department of Pharmacy, University of Washington, Seattle, Washington. Department of Pharmaceutics, University of Washington, Seattle, Washington
| | | | | | | | - Joo Ha Hwang
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, Washington.
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862
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Go YM, Sutliff RL, Chandler JD, Khalidur R, Kang BY, Anania FA, Orr M, Hao L, Fowler BA, Jones DP. Low-Dose Cadmium Causes Metabolic and Genetic Dysregulation Associated With Fatty Liver Disease in Mice. Toxicol Sci 2015; 147:524-34. [PMID: 26187450 DOI: 10.1093/toxsci/kfv149] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cadmium (Cd) is present in food at low levels and accumulates in humans throughout life because it is not effectively excreted. Cd from smoking or occupational exposure shows adverse effects on health, but the mechanistic effect of Cd at low dietary intake levels is poorly studied. Epidemiology studies found that nonalcoholic fatty liver disease (NAFLD), common in U.S. adults, is associated with Cd burden. In cell studies, we found that environmental low-dose Cd oxidized proteins and stimulated inflammatory signaling. However, little is known about low-dose Cd effects on liver function and associated metabolic pathways in vivo. We investigated effects of low-level Cd exposure on liver gene transcripts, metabolites, and associated metabolic pathways and function after challenging mice with Cd (10 mg/l) by drinking water. Results showed liver Cd in treated mice was similar to adult humans without occupational or smoking exposures and 10-fold higher than control mouse values. Pathway analysis of significantly altered liver genes and metabolites mapped to functional pathways of lipid metabolism, cell death and mitochondrial oxidative phosphorylation. These are well-recognized pathways associated with NAFLD. Cd-treated mice had higher liver enzymes in plasma and a trend toward fat accumulation in liver. To verify low-dose Cd-induced stimulation of cell death pathways, phosphorylation of c-Jun N-terminal kinase (JNK) was examined in cultured hepatic cells. Consistent with mouse liver data, low-dose Cd stimulated JNK activation. Together, the results show that low-dose Cd exposure causes liver function changes consistent with a role in NAFLD and possibly also nonalcoholic steatohepatitis.
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Affiliation(s)
- Young-Mi Go
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | - Roy L Sutliff
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | | | - Rahman Khalidur
- Digestive Diseases, Department of Medicine, Emory University, Atlanta, Georgia 30322
| | - Bum-Yong Kang
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | - Frank A Anania
- Digestive Diseases, Department of Medicine, Emory University, Atlanta, Georgia 30322
| | - Michael Orr
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | - Li Hao
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | - Bruce A Fowler
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
| | - Dean P Jones
- *Division of Pulmonary, Allergy and Critical Care Medicine, and
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863
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Mushtaq S, Ali T, Javed Q, Tabassum S, Murtaza I. N-Acetyl Cysteine Inhibits Endothelin-1-Induced ROS Dependent Cardiac Hypertrophy through Superoxide Dismutase Regulation. CELL JOURNAL 2015. [PMID: 26199914 PMCID: PMC4503849 DOI: 10.22074/cellj.2016.3746] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Objective Oxidative stress down regulates antioxidant enzymes including superoxide
dismutase (SOD) and contributes to the development of cardiac hypertrophy. N-Acetyl
cysteine (NAC) can enhance the SOD activity, so the aim of this study is to highlight the
inhibitory role of NAC against endothelin-1 (ET-1)-induced cardiac hypertrophy.
Materials and Methods In this experimental study at QAU from January, 2013 to March,
2013. ET-1 (50 µg/kg) and NAC (50 mg/kg) were given intraperitoneally to 6-day old neonatal
rats in combination or alone. All rats were sacrificed 15 days after the final injection. Histological analysis was carried out to observe the effects caused by both drugs. Reactive oxygen
species (ROS) analysis and SOD assay were also carried out. Expression level of hyper-
trophic marker, brain natriuretic peptide (BNP), was detected by western blotting.
Results Our findings showed that ET-1-induced cardiac hypertrophy leading towards
heart failure was due to the imbalance of different parameters including free radical-induced oxidative stress and antioxidative enzymes such as SOD. Furthermore NAC acted
as an antioxidant and played inhibitory role against ROS-dependent hypertrophy via regulatory role of SOD as a result of oxidative response associated with hypertrophy.
Conclusion ET-1-induced hypertrophic response is associated with increased ROS production and decreased SOD level, while NAC plays a role against free radicals-induced
oxidative stress via SOD regulation.
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Affiliation(s)
- Sobia Mushtaq
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Tahir Ali
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Qamar Javed
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Sobia Tabassum
- Department of Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Iram Murtaza
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
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864
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Lin HY, Chen SH, Chang SH, Huang ST. Tri-layered chitosan scaffold as a potential skin substitute. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:855-67. [PMID: 26155720 DOI: 10.1080/09205063.2015.1061350] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A tri-layered chitosan-based scaffold was successfully made to replicate the striation of a full-thickness skin more accurately than a single- or bi-layered scaffold, which needed weeks of co-culturing of fibroblasts and keratinocytes to achieve similar striation. Chitosan solution was freeze-dried and made into porous disks. Chitosan or chitosan-pectin in acetic acid solution was electrospun onto the chitosan disk to form a nanofibrous layer and a thin film. Examinations based on scanning electron spectroscopy showed that the scaffold was composed of a porous layer (2 mm) to simulate the dermis, a thin film (25-45 μm) to mimic the basement membrane, and a layer of nanofibers (100-200 μm) to serve as the protective epidermis. The tensile strength and modulus of the composite scaffold were significantly higher than those of the chitosan disk (p < 0.01). The composite was able to quickly absorb water and stayed intact throughout the course of the 14-day cell culture tests. The fibroblast cells seeded on both sides of the scaffolds were able to proliferate and stayed separated by the thin film.
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Affiliation(s)
- Hsin-Yi Lin
- a Graduate Institute of Biochemical and Biomedical Engineering , National Taipei University of Technology , Taipei 106 , Taiwan
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865
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Wozniak-Biel A, Janeczek M, Janus I, Nowak M. Surgical resection of peripheral odontogenic fibromas in African pygmy hedgehog (Atelerix albiventris): a case study. BMC Vet Res 2015; 11:145. [PMID: 26141314 PMCID: PMC4490659 DOI: 10.1186/s12917-015-0455-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 06/17/2015] [Indexed: 12/20/2022] Open
Abstract
Background Neoplastic lesions of the mammary gland, lymph nodes, or oral cavity in African pygmy hedgehogs (Atelerix albiventris) are common in captive animals. Chemotherapy and radiotherapy protocols have not yet been established for the African pygmy hedgehog. Thus, surgical resection is the current treatment of choice in this species. Case presentation A 5-year-old male African pygmy hedgehog showed multiple erythematous, round small tumors located in the oral cavity, on both sides of maxilla. The treatment of choice was surgical resection of tumors using a surgical knife under general anesthesia. Excised neoplastic lesions were diagnosed as peripheral odontogenic fibroma by histopathology. Six months after surgery relapse of tumors in the oral cavity was not observed. Conclusions The treatment adopted in this case report is safe for the patient and provides the best solution for mild proliferative lesions of the oral cavity. To our knowledge this is the first report of surgical resection of oral tumors (peripheral odontogenic fibroma) in the African pygmy hedgehog.
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Affiliation(s)
- Anna Wozniak-Biel
- Department of Epizootiology and Clinic of Bird and Exotic Animals, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland.
| | - Maciej Janeczek
- Department of Animal Physiology and Biostructure, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland.
| | - Izabela Janus
- Department of Pathology, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland.
| | - Marcin Nowak
- Department of Pathology, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland.
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866
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O’Brien MP, Penmatsa M, Palukuru U, West P, Yang X, Bostrom MPG, Freeman T, Pleshko N. Monitoring the Progression of Spontaneous Articular Cartilage Healing with Infrared Spectroscopy. Cartilage 2015; 6:174-84. [PMID: 26175863 PMCID: PMC4481387 DOI: 10.1177/1947603515572874] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE Evaluation of early compositional changes in healing articular cartilage is critical for understanding tissue repair and for therapeutic decision-making. Fourier transform infrared imaging spectroscopy (FT-IRIS) can be used to assess the molecular composition of harvested repair tissue. Furthermore, use of an infrared fiber-optic probe (IFOP) has the potential for translation to a clinical setting to provide molecular information in situ. In the current study, we determined the feasibility of IFOP assessment of cartilage repair tissue in a rabbit model, and assessed correlations with gold-standard histology. DESIGN Bilateral osteochondral defects were generated in mature white New Zealand rabbits, and IFOP data obtained from defect and adjacent regions at 2, 4, 6, 8, 12, and 16 weeks postsurgery. Tissues were assessed histologically using the modified O'Driscoll score, by FT-IRIS, and by partial least squares (PLS) modeling of IFOP spectra. RESULTS The FT-IRIS parameters of collagen content, proteoglycan content, and collagen index correlated significantly with modified O'Driscoll score (P = 0.05, 0.002, and 0.02, respectively), indicative of their sensitivity to tissue healing. Repair tissue IFOP spectra were distinguished from normal tissue IFOP spectra in all samples by PLS analysis. However, the PLS model for prediction of histological score had a high prediction error, which was attributed to the spectral information being acquired from the tissue surface only. CONCLUSION The strong correlations between FT-IRIS data and histological score support further development of the IFOP technique for clinical applications, although further studies to optimize data collection from the full sample depths are required.
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Affiliation(s)
- Megan P. O’Brien
- Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | - Madhuri Penmatsa
- Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | - Uday Palukuru
- Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | - Paul West
- Department of Mathematics, Engineering & Computer Science, LaGuardia Community College, Long Island City, NY, USA
| | - Xu Yang
- Hospital of Special Surgery; New York, NY, USA
| | | | - Theresa Freeman
- Department of Orthopaedics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Nancy Pleshko
- Department of Bioengineering, Temple University, Philadelphia, PA, USA
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867
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Xiao X, Zhou X, Ming H, Zhang J, Huang G, Zhang Z, Li P. Chick Chorioallantoic Membrane Assay: A 3D Animal Model for Study of Human Nasopharyngeal Carcinoma. PLoS One 2015; 10:e0130935. [PMID: 26107941 PMCID: PMC4479447 DOI: 10.1371/journal.pone.0130935] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 05/02/2015] [Indexed: 01/03/2023] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a highly invasive and metastatic head and neck cancer. However, mechanistic study of the invasion and metastasis of NPC has been hampered by the lack of proper in vivo models. We established an in vivo chick embryo chorioallantoic membrane (CAM) model to study NPC tumor biology. We found 100% micro-tumor formation 3 days after inoculation with NPC cell lines (4/4) or primary tumor biopsy tissue (35/35). The transplanted NPC micro-tumors grew on CAMs with extracellular matrix interaction and induced angiogenesis. In addition, the CAM model could be used to study the growth of transplanted NPC tumors and also several important steps of metastasis, including tumor invasion by detecting the extent of basement membrane penetration, tumor angiogenesis by analyzing the area of neo-vessels, and tumor metastasis by quantifying tumor cells in distant organs. We established and described a feasible, easy-to-manipulate and reliable CAM model for in vivo study of NPC tumor biology. This model closely simulates the clinical features of NPC growth, progression and metastasis and could help elucidate the biological mechanisms of the growth pattern and invasion of NPC cells and in quantitative assessment of angiogenesis and cell intravasation.
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Affiliation(s)
- Xue Xiao
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiaoying Zhou
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Huixin Ming
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jinyan Zhang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Guangwu Huang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhe Zhang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
- * E-mail: (ZZ); (PL)
| | - Ping Li
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
- * E-mail: (ZZ); (PL)
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868
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Bwala DG, Fasina FO, Duncan NM. Avian poxvirus in a free-range juvenile speckled (rock) pigeon (Columba guinea). J S Afr Vet Assoc 2015; 86:e1-e4. [PMID: 26016787 PMCID: PMC6138102 DOI: 10.4102/jsava.v86i1.1259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 02/22/2015] [Accepted: 03/06/2015] [Indexed: 02/05/2023] Open
Abstract
A flightless wild juvenile rock pigeon (Columba guinea) with pox-like lesions was picked up on the premises of the Faculty of Veterinary Science, University of Pretoria, Onderstepoort. The pigeon was housed overnight for possible treatment the following day but died before any other intervention could be instituted. At necropsy, coalescing masses of yellowish nodular cutaneous tumour-like lesions principally on the featherless areas were noticed on the dead pigeon's head as well as the beak. Histological examination of the sampled skin lesions revealed multifocal areas of hypertrophic and hyperplastic epidermal epithelial cells with eosinophilic intracytoplasmic inclusion bodies (Bollinger bodies). Extract from the lesion was processed and inoculated on the chorioallantoic membranes (CAM) of 11-day-old embryonated chicken eggs and this produced pocks on one of the CAM at day 7 post-inoculation. Electron microscopy confirmed the presence of poxvirus in the CAM with the pock lesions.
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Affiliation(s)
- Dauda G Bwala
- Poultry Reference Centre, Department of Production Animal Studies, University of Pretoria.
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869
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Nakane K, Takiyama A, Mori S, Matsuura N. Homology-based method for detecting regions of interest in colonic digital images. Diagn Pathol 2015; 10:36. [PMID: 25907563 PMCID: PMC4448533 DOI: 10.1186/s13000-015-0244-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 03/04/2015] [Indexed: 11/10/2022] Open
Abstract
Background A region of interest (ROI) is a part of tissue that contains important information for diagnosis. To use many image analysis methods efficiently, a technique that would allow for ROI identification is required. For the colon, ROIs are characterized by areas of stronger color intensity of hematoxylin. Since malignant tumors grow in the innermost layer, most ROIs will be located in the colonic mucosa and will be an accumulation of tumor cells and/or integrated cells with distorted architecture. Methods Using homology theory, our group proposed a method to estimate the contact degree of elements in a unit area of tissue. Homology is a concept that is used in many branches of algebra and topology, and it can quantify the contact degree. Due to the lack of contact inhibition of cancer cells, an area with unusual contact degree is expected to be a potential ROI. Results The current work verifies the accuracy of this method against the results of pathological diagnosis, based on 1825 colonic images provided by the Osaka Medical Center for Cancer and Cardiovascular Diseases. Although we have many false positives and there is a possibility of missing undifferentiated types of cancer, this system is very effective for detecting ROIs. Conclusions The mathematical system proposed by our group successfully detects ROIs and is a potentially useful tool for differentiating tumor areas in microscopic examination very quickly. Because we use only the information from low-power field images, there is room for further improvement. This system could be used to screen for not only colon cancer but other cancers as well. More sophisticated and more efficient automated pathological diagnosis systems can be developed by integrating various techniques available today. Virtual Slide The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/7129390011429407.
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Affiliation(s)
- Kazuaki Nakane
- Department of Molecular Pathology, Osaka University Graduate School of Medicine and Health Science, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Akihiro Takiyama
- Department of Cancer Pathology, Hokkaido University Graduate School of Medicine, Nishi 7 kita 15 Kita ward, Sapporo, Hokkaido, 060-8638, Japan.
| | - Seiji Mori
- Department of Molecular Pathology, Osaka University Graduate School of Medicine and Health Science, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Nariaki Matsuura
- Department of Molecular Pathology, Osaka University Graduate School of Medicine and Health Science, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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870
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Peng XM, Gao L, Huo SX, Liu XM, Yan M. The Mechanism of Memory Enhancement of Acteoside (Verbascoside) in the Senescent Mouse Model Induced by a Combination of D-gal and AlCl3. Phytother Res 2015; 29:1137-44. [PMID: 25900087 DOI: 10.1002/ptr.5358] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 02/27/2015] [Accepted: 03/24/2015] [Indexed: 11/11/2022]
Abstract
Acteoside (verbsacoside), one of the main active phenylethanoid glycosides from Cistanche deserticola, is known to have antioxidant and neuroprotective activity, and herbs containing it are used to enhance memory. However, there is relatively little direct experimental evidence to support the use of acteoside in Alzheimer's disease (AD). The purpose of this study was to elucidate the effects of acteoside in improving learning and memory, using a mouse model of senescence induced by a combination of d-galactose and AlCl3 , and investigate its potential mechanisms compared with the positive controls vitamin E and piracetam. Acteoside was administered intragastrically at doses of 30, 60 and 120 mg/kg/day for 30 days after AD was induced. Memory function was evaluated using a step-down test. The number of neuron was analysed by haematoxylin and eosin staining and the number of Nissl bodies by Nissl staining. The expression of caspase-3 protein in hippocampus was detected by immunohistochemistry and western blot. Nitric oxide and total nitric oxide synthase level in hippocampus were also assessed. Our results showed that the latency of step down was shortened in AD model mice and the number of errors decreased after treatment with all doses of acteoside. Neurons and Nissl bodies in the hippocampus were increased significantly with higher doses (60 and 120 mg/kg/day) of acteoside. The content of nitric oxide, the activity of nitric oxide synthase and the expression of caspase-3 protein were decreased by 120 mg/kg/day acteoside compared with that of the AD model group. Our results support the results obtained previously using the Morris maze test in the same mouse model of senescence, and the use of traditional medicinal herbs containing acteoside for neuroprotection and memory loss.
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Affiliation(s)
- Xiao-Ming Peng
- Prescription Laboratory of Xinjiang Traditional Uyghur Medicine, Xinjiang Institute of Traditional Uyghur Medicine, Urumqi, Xinjiang, 830049, China
| | - Li Gao
- Prescription Laboratory of Xinjiang Traditional Uyghur Medicine, Xinjiang Institute of Traditional Uyghur Medicine, Urumqi, Xinjiang, 830049, China
| | - Shi-Xia Huo
- Prescription Laboratory of Xinjiang Traditional Uyghur Medicine, Xinjiang Institute of Traditional Uyghur Medicine, Urumqi, Xinjiang, 830049, China
| | - Xin-Min Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing, 100193, China
| | - Ming Yan
- Prescription Laboratory of Xinjiang Traditional Uyghur Medicine, Xinjiang Institute of Traditional Uyghur Medicine, Urumqi, Xinjiang, 830049, China
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871
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Brown AO, Orihuela CJ. Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling. J Vis Exp 2015:52590. [PMID: 25939051 PMCID: PMC4541479 DOI: 10.3791/52590] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
During bacteremia Streptococcus pneumoniae can translocate across the vascular endothelium into the myocardium and form discrete bacteria-filled microscopic lesions (microlesions) that are remarkable due to the absence of infiltrating immune cells. Due to their release of cardiotoxic products, S. pneumoniae within microlesions are thought to contribute to the heart failure that is frequently observed during fulminate invasive pneumococcal disease in adults. Herein is demonstrated a protocol for experimental mouse infection that leads to reproducible cardiac microlesion formation within 30 hr. Instruction is provided on microlesion identification in hematoxylin & eosin stained heart sections and the morphological distinctions between early and late microlesions are highlighted. Instruction is provided on a protocol for verification of S. pneumoniae within microlesions using antibodies against pneumococcal capsular polysaccharide and immunofluorescent microscopy. Last, a protocol for antibiotic intervention that rescues infected mice and for the detection and assessment of scar formation in the hearts of convalescent mice is provided. Together, these protocols will facilitate the investigation of the molecular mechanisms underlying pneumococcal cardiac invasion, cardiomyocyte death, cardiac remodeling as a result of exposure to S. pneumoniae, and the immune response to the pneumococci in the heart.
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Affiliation(s)
- Armand O Brown
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio
| | - Carlos J Orihuela
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio;
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872
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Li JJ, Ferry RJ, Diao S, Xue B, Bahouth SW, Liao FF. Nedd4 haploinsufficient mice display moderate insulin resistance, enhanced lipolysis, and protection against high-fat diet-induced obesity. Endocrinology 2015; 156:1283-91. [PMID: 25607895 PMCID: PMC4399314 DOI: 10.1210/en.2014-1909] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Neural precursor cell expressed developmentally down-regulated protein 4 (Nedd4) is the prototypical protein in the Nedd4 ubiquitin ligase (E3) family, which governs ubiquitin-dependent endocytosis and/or degradation of plasma membrane proteins. Loss of Nedd4 results in embryonic or neonatal lethality in mice and reduced insulin/IGF-1 signaling in embryonic fibroblasts. To delineate the roles of Nedd4 in vivo, we examined the phenotypes of heterozygous knockout mice using a high-fat diet-induced obesity (HFDIO) model. We observed that Nedd4+/- mice are moderately insulin resistant but paradoxically protected against HFDIO. After high-fat diet feeding, Nedd4+/- mice showed less body weight gain, less fat mass, and smaller adipocytes vs the wild type. Despite ameliorated HFDIO, Nedd4+/- mice did not manifest improvement in glucose tolerance vs the wild type in both genders. Nedd4+/- male, but not female, mice displayed significantly lower fasting blood glucose levels and serum insulin levels. Under obesogenic conditions, Nedd4+/- mice displayed elevated stimulated lipolytic activity, primarily through a β2-adrenergic receptor. Combined, these data support novel complex roles for Nedd4 in metabolic regulation involving altered insulin and β-adrenergic signaling pathways.
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Affiliation(s)
- Jing Jing Li
- Departments of Pharmacology (J.J.L., S.D., S.W.B., F.-F.L.) and Pediatrics (R.J.F.), University of Tennessee Health Science Center, Memphis, Tennessee 38163; Department of Psychology (R.J.F), University of Memphis, Memphis, Tennessee 38152; and Department of Biology (B.X.), Georgia State University, Atlanta, Georgia 30302
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873
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Yang J, Charif AC, Puskas JE, Phillips H, Shanahan KJ, Garsed J, Fleischman A, Goldman K, Roy S, Luebbers MT, Dombrowski SM, Luciano MG. Biocompatibility evaluation of a thermoplastic rubber for wireless telemetric intracranial pressure sensor coating. J Mech Behav Biomed Mater 2015; 45:83-9. [PMID: 25688030 DOI: 10.1016/j.jmbbm.2015.01.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/21/2015] [Accepted: 01/26/2015] [Indexed: 12/13/2022]
Abstract
This study investigated the biocompatibility of the experimental thermoplastic rubber Arbomatrix(™) that will be used as the protective coating on a novel intracranial pressure (ICP) sensor silicon chip. Arbomatrix(™) was benchmarked against biocompatible commercial silicone rubber shunt tubing in the brain via a rat model with 60-day implant duration. A bare silicon chip was also implanted. The results showed similar cellular distribution in the brain-implant boundary and surrounding tissues. Quantitative analysis of neuron and glia density did not show significant difference between implants. Through histological and immunohistochemical evaluation we conclude that Arbomatrix(™) is well tolerated by the brain. Due to its exceptional barrier properties Arbomatrix(™) has already been shown to be an excellent protective coating for new ICP monitoring chip.
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Affiliation(s)
- Jun Yang
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Andrea C Charif
- Department of Chemical and Biomolecular Engineering, the University of Akron, USA; Department of Polymer Science, the University of Akron, USA
| | - Judit E Puskas
- Department of Chemical and Biomolecular Engineering, the University of Akron, USA; Department of Polymer Science, the University of Akron, USA
| | - Hannah Phillips
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Kaitlyn J Shanahan
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Jessica Garsed
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Aaron Fleischman
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | | | | | - Matthew T Luebbers
- Department of Chemical and Biomolecular Engineering, the University of Akron, USA
| | - Stephen M Dombrowski
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Mark G Luciano
- Department of Neurosurgery, Section of Pediatric and Congenital Neurological Surgery, CSF Physiology Laboratory, Neurological Institute, S60, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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874
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Genetically engineered mouse models to study prostate cancer. Methods Mol Biol 2015. [PMID: 25636465 DOI: 10.1007/978-1-4939-2297-0_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Genetically engineered mouse models have become fundamental tools in the basic and translational research of prostate cancer. There is a plethora of models available to dissect the genetic alterations and aberrant signaling events associated with human prostate cancer and, furthermore, to investigate new and "personalized" therapies to treat the disease. In this chapter, we discuss some of the models recently and currently used to study prostate cancer in vivo, and some considerations when selecting an appropriate model to investigate particular aspects of the disease. We describe the methods required to isolate prostate tumors and conduct basic characterization of the tumor to determine tumor load and histopathology. We also discuss important aspects to be considered when processing samples for further analysis.
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875
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Blair LJ, Frauen HD, Zhang B, Nordhues BA, Bijan S, Lin YC, Zamudio F, Hernandez LD, Sabbagh JJ, Selenica MLB, Dickey CA. Tau depletion prevents progressive blood-brain barrier damage in a mouse model of tauopathy. Acta Neuropathol Commun 2015; 3:8. [PMID: 25775028 PMCID: PMC4353464 DOI: 10.1186/s40478-015-0186-2] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/12/2015] [Indexed: 12/31/2022] Open
Abstract
Introduction The blood-brain barrier (BBB) is damaged in tauopathies, including progressive supranuclear palsy (PSP) and Alzheimer’s disease (AD), which is thought to contribute to pathogenesis later in the disease course. In AD, BBB dysfunction has been associated with amyloid beta (Aß) pathology, but the role of tau in this process is not well characterized. Since increased BBB permeability is found in tauopathies without Aß pathology, like PSP, we suspected that tau accumulation alone could not only be sufficient, but even more important than Aß for BBB damage. Results Longitudinal evaluation of brain tissue from the tetracycline-regulatable rTg4510 tau transgenic mouse model showed progressive IgG, T cell and red blood cell infiltration. The Evans blue (EB) dye that is excluded from the brain when the BBB is intact also permeated the brains of rTg4510 mice following peripheral administration, indicative of a bonafide BBB defect, but this was only evident later in life. Thus, despite the marked brain atrophy and inflammation that occurs earlier in this model, BBB integrity is maintained. Interestingly, BBB dysfunction emerged at the same time that perivascular tau emerged around major hippocampal blood vessels. However, when tau expression was suppressed using doxycycline, BBB integrity was preserved, suggesting that the BBB can be stabilized in a tauopathic brain by reducing tau levels. Conclusions For the first time, these data demonstrate that tau alone can initiate breakdown of the BBB, but the BBB is remarkably resilient, maintaining its integrity in the face of marked brain atrophy, neuroinflammation and toxic tau accumulation. Moreover, the BBB can recover integrity when tau levels are reduced. Thus, late stage interventions targeting tau may slow the vascular contributions to cognitive impairment and dementia that occur in tauopathies. Electronic supplementary material The online version of this article (doi:10.1186/s40478-015-0186-2) contains supplementary material, which is available to authorized users.
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876
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Valtcheva MV, Samineni VK, Golden JP, Gereau RW, Davidson S. Enhanced nonpeptidergic intraepidermal fiber density and an expanded subset of chloroquine-responsive trigeminal neurons in a mouse model of dry skin itch. THE JOURNAL OF PAIN 2015; 16:346-56. [PMID: 25640289 DOI: 10.1016/j.jpain.2015.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 01/08/2015] [Accepted: 01/16/2015] [Indexed: 12/13/2022]
Abstract
UNLABELLED Chronic pruritic conditions are often associated with dry skin and loss of epidermal barrier integrity. In this study, repeated application of acetone and ether followed by water (AEW) to the cheek skin of mice produced persistent scratching behavior with no increase in pain-related forelimb wiping, indicating the generation of itch without pain. Cheek skin immunohistochemistry showed a 64.5% increase in total epidermal innervation in AEW-treated mice compared to water-treated controls. This increase was independent of scratching, because mice prevented from scratching by Elizabethan collars showed similar hyperinnervation. To determine the effects of dry skin treatment on specific subsets of peripheral fibers, we examined Ret-positive, calcitonin gene-related peptide (CGRP)-positive, and glial cell line-derived neurotrophic factor family receptor α3 (GFRα3)-positive intraepidermal fiber density. AEW treatment increased Ret-positive fibers but not CGRP-positive or GFRα3-positive fibers, suggesting that a specific subset of nonpeptidergic fibers could contribute to dry skin itch. To test whether trigeminal ganglion neurons innervating the cheek exhibited altered excitability after AEW treatment, primary cultures of retrogradely labeled neurons were examined using whole-cell patch clamp electrophysiology. AEW treatment produced no differences in measures of excitability compared to water-treated controls. In contrast, a significantly higher proportion of trigeminal ganglion neurons was responsive to the nonhistaminergic pruritogen chloroquine after AEW treatment. We conclude that nonpeptidergic, Ret-positive fibers and chloroquine-sensitive neurons may contribute to dry skin pruritus. PERSPECTIVE This study examines the underlying neurobiological mechanisms of persistent dry skin itch. Our results indicate that nonpeptidergic epidermal hyperinnervation and nonhistaminergic pruritic receptors are potential targets for chronic pruritus.
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Affiliation(s)
- Manouela V Valtcheva
- Washington University Pain Center and Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri; Medical Scientist Training Program, Washington University in St. Louis, St. Louis, Missouri
| | - Vijay K Samineni
- Washington University Pain Center and Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri
| | - Judith P Golden
- Washington University Pain Center and Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri
| | - Robert W Gereau
- Washington University Pain Center and Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri
| | - Steve Davidson
- Washington University Pain Center and Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri.
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877
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Aulino P, Costa A, Chiaravalloti E, Perniconi B, Adamo S, Coletti D, Marrelli M, Tatullo M, Teodori L. Muscle extracellular matrix scaffold is a multipotent environment. Int J Med Sci 2015; 12:336-40. [PMID: 25897295 PMCID: PMC4402437 DOI: 10.7150/ijms.10761] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 11/21/2014] [Indexed: 11/05/2022] Open
Abstract
The multipotency of scaffolds is a new concept. Skeletal muscle acellular scaffolds (MAS) implanted at the interface of Tibialis Anterior/tibial bone and masseter muscle/mandible bone in a murine model were colonized by muscle cells near the host muscle and by bone-cartilaginous tissues near the host bone, thus highlighting the importance of the environment in directing cell homing and differentiation. These results unveil the multipotency of MAS and point to the potential of this new technique as a valuable tool in musculo-skeletal tissue regeneration.
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Affiliation(s)
- Paola Aulino
- 1. Section of Histology and Medical Embryology, Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, Rome, Italy ; 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy
| | - Alessandra Costa
- 1. Section of Histology and Medical Embryology, Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, Rome, Italy ; 3. Fondazione San Raffaele, Ceglie Messapica, Italy ; 4. Department of Surgery, McGowan Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ernesto Chiaravalloti
- 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy
| | - Barbara Perniconi
- 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy ; 5. UMR 8256 CNRS Biology of Adaptation and Aging, University Pierre et Marie Curie Paris 06, Paris, France
| | - Sergio Adamo
- 1. Section of Histology and Medical Embryology, Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Dario Coletti
- 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy ; 5. UMR 8256 CNRS Biology of Adaptation and Aging, University Pierre et Marie Curie Paris 06, Paris, France
| | - Massimo Marrelli
- 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy
| | - Marco Tatullo
- 2. Calabrodental clinic, Biomedical Section, Maxillofacial Surgery Unit, Crotone, Italy ; 6. Tecnologica Research Institute, Biomedical Section, Crotone, Italy
| | - Laura Teodori
- 3. Fondazione San Raffaele, Ceglie Messapica, Italy ; 7. UTAPRAD-DIM, ENEA Frascati, Rome, Italy
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878
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Hübner NS, Merkle A, Jung B, von Elverfeldt D, Harsan LA. Analysis of left ventricular function of the mouse heart during experimentally induced hyperthyroidism and recovery. NMR IN BIOMEDICINE 2015; 28:116-123. [PMID: 25394338 DOI: 10.1002/nbm.3233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 10/06/2014] [Accepted: 10/07/2014] [Indexed: 06/04/2023]
Abstract
Many of the clinical manifestations of hyperthyroidism are due to the ability of thyroid hormones to alter myocardial contractility and cardiovascular hemodynamics, leading to cardiovascular impairment. In contrast, recent studies highlight also the potential beneficial effects of thyroid hormone administration for clinical or preclinical treatment of different diseases such as atherosclerosis, obesity and diabetes or as a new therapeutic approach in demyelinating disorders. In these contexts and in the view of developing thyroid hormone-based therapeutic strategies, it is, however, important to analyze undesirable secondary effects on the heart. Animal models of experimentally induced hyperthyroidism therefore represent important tools for investigating and monitoring changes of cardiac function. In our present study we use high-field cardiac MRI to monitor and follow-up longitudinally the effects of prolonged thyroid hormone (triiodothyronine) administration focusing on murine left ventricular function. Using a 9.4 T small horizontal bore animal scanner, cinematographic MRI was used to analyze changes in ejection fraction, wall thickening, systolic index and fractional shortening. Cardiac MRI investigations were performed after sustained cycles of triiodothyronine administration and treatment arrest in adolescent (8 week old) and adult (24 week old) female C57Bl/6 N mice. Triiodothyronine supplementation of 3 weeks led to an impairment of cardiac performance with a decline in ejection fraction, wall thickening, systolic index and fractional shortening in both age groups but with a higher extent in the group of adolescent mice. However, after a hormonal treatment cessation of 3 weeks, only young mice are able to partly restore cardiac performance in contrast to adult mice lacking this recovery potential and therefore indicating a presence of chronically developed heart pathology.
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Affiliation(s)
- Neele Saskia Hübner
- Department of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
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879
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Padmanabhan J. Immunostaining analysis of tissue cultured cells and tissue sections using phospho-Histone H3 (Serine 10) antibody. Methods Mol Biol 2015; 1288:231-44. [PMID: 25827883 DOI: 10.1007/978-1-4939-2474-5_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Post-translational modifications of histones play an important role in regulation of gene expression through condensation and decondensation of chromatin structure. These modifications include acetylation, methylation, phosphorylation and ubiquitination. Phosphorylation on histones is associated with cellular responses such as DNA damage, transcription, chromatin compaction and mitosis or meiosis. One of the most extensively studied modifications of histones is the Serine 10 phosphorylation on histone H3 N-terminal tail. This specific phosphorylation on Histone H3 has been associated with condensation and transcriptional inactivation of mitotic chromosomes, but recent studies have suggested a role for this specific phosphorylation in chromatin relaxation and activation of transcription in interphase cells. Co-immunostaining analysis of cells using antibodies specific to serine 10P-Histone H3 together with those to cell cycle specific markers will allow us to determine the nature of phosphorylation in a cell cycle-specific manner. In a complex system, such as tissue specimens, analysis using P-Histone H3 and a cell type specific antibody will allow identification of specific cells that are affected by this histone modification. This is of particular interest in the field of cancer biology or neurobiology where identification or quantification of the transcriptionally active or mitotic cells will enable one to evaluate the progression of the disease development. The protocol described here provides details on how co-immunostaining and analysis can be performed in tissue cultured cells or tissue sections.
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Affiliation(s)
- Jaya Padmanabhan
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, University of South Florida, 4001 E Fletcher Ave, Tampa, 33613, FL, USA,
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880
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Xiao Yao San Improves Depressive-Like Behaviors in Rats with Chronic Immobilization Stress through Modulation of Locus Coeruleus-Norepinephrine System. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:605914. [PMID: 25610478 PMCID: PMC4291141 DOI: 10.1155/2014/605914] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 11/25/2014] [Indexed: 11/18/2022]
Abstract
Most research focuses on the hypothalamic-pituitary-adrenal (HPA) axis, hypothalamus-pituitary-thyroid (HPT) axis, and hypothalamus-pituitary-gonadal (HPGA) axis systems of abnormalities of emotions and behaviors induced by stress, while no studies of Chinese herbal medicine such as Xiao Yao San (XYS) on the mechanisms of locus coeruleus-norepinephrine (LC-NE) system have been reported. Therefore, experiments were carried out to observe mechanism of LC-NE system in response to chronic immobilization stress (CIS) and explore the antidepressant effect of XYS. Rat model was established by CIS. LC morphology in rat was conducted. The serum norepinephrine (NE) concentrations and NE biosynthesis such as tyrosine hydroxylase (TH), dopamine-β-hydroxylase (DBH), and corticotrophin-releasing-factor (CRF) in LC were determined. Results showed that there were no discernible alterations in LC in rats. The serum NE concentrations, positive neurons, mean optical density (MOD), and protein levels of TH, DBH, and CRF in model group were significantly increased compared to the control group. But XYS-treated group displayed a significantly decreased in NE levels and expressions of TH, DBH, and CRF compared to the model group. In conclusion, CIS can activate LC-NE system to release NE and then result in a significant decrease in rats. XYS treatment can effectively improve depressive-like behaviors in rats through inhibition of LC-NE neurons activity.
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881
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Generation of outbred Ace2 knockout mice by RNA transfection of TALENs displaying colitis reminiscent pathophysiology and inflammation. Transgenic Res 2014; 24:433-46. [PMID: 25448263 PMCID: PMC7102211 DOI: 10.1007/s11248-014-9855-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 11/21/2014] [Indexed: 01/04/2023]
Abstract
The angiotensin I converting enzyme 2 (ACE2) is a key factor in the maintenance of intestinal homeostasis. Dysregulation of homeostasis can lead to inflammation of the colon (colitis), which can cause life-threatening enfeeblement or even cancer. Animal models are valuable surrogates in deciphering the pathology behind such human conditions and for screening of putative therapeutic targets or treatment paradigms. However, development of disease models can be time-consuming and technical demanding, which might hamper their application-value. In this study, we genetically disrupted the mouse Ace2 gene by direct injection of in vitro transcribed mRNA coding for transcription activator-like effector nucleases (TALENs) into the cytoplasm of outbred Kunming mouse zygotes. Consequently, somatic mutations were induced with an efficiency of 57 %, of which 39 % were frameshift mutations. Moreover, all modifications were stably transferred during germline transmission. In Ace2-knockout male mice (Ace2−/y), we observed severe chemical induced colitis, characterized by considerable weight loss, diarrhea and a shortened colon length. Histologically, Ace2 mutations resulted in the infiltration of leukocytes and the overt damage of the intestinal mucosal barrier. In addition, we detected an increased expression of inflammatory cytokines in the colon tissue of Ace2−/y mice. Collectively, the data indicate that high targeting efficiency and heritability can be achieved in an outbred mouse model by zygote injection of TALEN mRNA. Furthermore, the generated Ace2−/y mice display phenotypic traits reminiscent of colitis and we anticipate that such mice can be of value in studies of the intestinal microbiome or fecal transplantation.
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882
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Ovadje P, Ma D, Tremblay P, Roma A, Steckle M, Guerrero JA, Arnason JT, Pandey S. Evaluation of the efficacy & biochemical mechanism of cell death induction by Piper longum extract selectively in in-vitro and in-vivo models of human cancer cells. PLoS One 2014; 9:e113250. [PMID: 25401766 PMCID: PMC4234676 DOI: 10.1371/journal.pone.0113250] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 10/21/2014] [Indexed: 02/05/2023] Open
Abstract
Background Currently chemotherapy is limited mostly to genotoxic drugs that are associated with severe side effects due to non-selective targeting of normal tissue. Natural products play a significant role in the development of most chemotherapeutic agents, with 74.8% of all available chemotherapy being derived from natural products. Objective To scientifically assess and validate the anticancer potential of an ethanolic extract of the fruit of the Long pepper (PLX), a plant of the piperaceae family that has been used in traditional medicine, especially Ayurveda and investigate the anticancer mechanism of action of PLX against cancer cells. Materials & Methods Following treatment with ethanolic long pepper extract, cell viability was assessed using a water-soluble tetrazolium salt; apoptosis induction was observed following nuclear staining by Hoechst, binding of annexin V to the externalized phosphatidyl serine and phase contrast microscopy. Image-based cytometry was used to detect the effect of long pepper extract on the production of reactive oxygen species and the dissipation of the mitochondrial membrane potential following Tetramethylrhodamine or 5,5,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolylcarbocyanine chloride staining (JC-1). Assessment of PLX in-vivo was carried out using Balb/C mice (toxicity) and CD-1 nu/nu immunocompromised mice (efficacy). HPLC analysis enabled detection of some primary compounds present within our long pepper extract. Results Our results indicated that an ethanolic long pepper extract selectively induces caspase-independent apoptosis in cancer cells, without affecting non-cancerous cells, by targeting the mitochondria, leading to dissipation of the mitochondrial membrane potential and increase in ROS production. Release of the AIF and endonuclease G from isolated mitochondria confirms the mitochondria as a potential target of long pepper. The efficacy of PLX in in-vivo studies indicates that oral administration is able to halt the growth of colon cancer tumors in immunocompromised mice, with no associated toxicity. These results demonstrate the potentially safe and non-toxic alternative that is long pepper extract for cancer therapy.
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Affiliation(s)
- Pamela Ovadje
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Dennis Ma
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Phillip Tremblay
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Alessia Roma
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Matthew Steckle
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
| | | | | | - Siyaram Pandey
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada
- * E-mail:
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883
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Langer L, Binenbaum Y, Gugel L, Amit M, Gil Z, Dekel S. Computer-aided diagnostics in digital pathology: automated evaluation of early-phase pancreatic cancer in mice. Int J Comput Assist Radiol Surg 2014; 10:1043-54. [PMID: 25354901 DOI: 10.1007/s11548-014-1122-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 10/09/2014] [Indexed: 12/18/2022]
Abstract
PURPOSE Digital pathology diagnostics are often based on subjective qualitative measures. A murine model of early-phase pancreatic ductal adenocarcinoma provides a controlled environment with a priori knowledge of the genetic mutation and stage of the disease. Use of this model enables the application of supervised learning methods to digital pathology. A computerized diagnostics system for histological detection of pancreatic adenocarcinoma was developed and tested. METHODS : Pathological H&E-stained specimens with early pancreatic lesions were identified and evaluated with a system that models cancer detection using a top-down object learning paradigm, mimicking the way a pathologist learns. First, the dominant primitives were identified and segmented in the images, i.e., the ducts, nuclei and tumor stroma. A boost-based machine learning technique was used for duct segmentation, classification and outlier pruning. Second, a set of morphological features traditionally used for cancer diagnosis which provides quantitative image features was employed to quantify subtle findings such as duct deformation and nuclei malformations. Finally, a visually interpretable predictive model was trained to distinguish between normal tissue and premalignant cancer lesions, given ground truth samples. RESULTS : A predictive success rate of 92% was achieved using tenfold cross-validation and 93% on an independent test set. Comparison was made with state-of-the-art classification algorithms that are not interpretable as visible features yielded the contribution of individual primitive features to the prediction outcome. CONCLUSIONS Quantitative image analysis and classification were successful in preclinical histology diagnosis for early-stage pancreatic adenocarcinoma. The usage of annotated contours coupled with interpretable supervised learning methods and outlier pruning can be adapted to other medical imaging tasks. The usage of interpretable supervised learning techniques may improve the success of CAD in histopathological diagnosis.
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Affiliation(s)
- Leeor Langer
- School of Mathematical Sciences, Tel Aviv University, 6997801, Tel Aviv, Israel,
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884
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Peng Z, Andersson K, Lindholm J, Bodin I, Pramana S, Pawitan Y, Nistér M, Nilsson S, Li C. Operator dependent choice of prostate cancer biopsy has limited impact on a gene signature analysis for the highly expressed genes IGFBP3 and F3 in prostate cancer epithelial cells. PLoS One 2014; 9:e109610. [PMID: 25296164 PMCID: PMC4190108 DOI: 10.1371/journal.pone.0109610] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 09/01/2014] [Indexed: 11/20/2022] Open
Abstract
Background Predicting the prognosis of prostate cancer disease through gene expression analysis is receiving increasing interest. In many cases, such analyses are based on formalin-fixed, paraffin embedded (FFPE) core needle biopsy material on which Gleason grading for diagnosis has been conducted. Since each patient typically has multiple biopsy samples, and since Gleason grading is an operator dependent procedure known to be difficult, the impact of the operator's choice of biopsy was evaluated. Methods Multiple biopsy samples from 43 patients were evaluated using a previously reported gene signature of IGFBP3, F3 and VGLL3 with potential prognostic value in estimating overall survival at diagnosis of prostate cancer. A four multiplex one-step qRT-PCR test kit, designed and optimized for measuring the signature in FFPE core needle biopsy samples was used. Concordance of gene expression levels between primary and secondary Gleason tumor patterns, as well as benign tissue specimens, was analyzed. Results The gene expression levels of IGFBP3 and F3 in prostate cancer epithelial cell-containing tissue representing the primary and secondary Gleason patterns were high and consistent, while the low expressed VGLL3 showed more variation in its expression levels. Conclusion The assessment of IGFBP3 and F3 gene expression levels in prostate cancer tissue is independent of Gleason patterns, meaning that the impact of operator's choice of biopsy is low.
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Affiliation(s)
- Zhuochun Peng
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Chundsell Medicals AB, Stockholm, Sweden
| | - Karl Andersson
- Department of Oncology, Radiology and Radiation Sciences, Uppsala University, Uppsala, Sweden
- Ridgeview Instruments AB, Uppsala, Sweden
| | - Johan Lindholm
- Clinical Pathology/Cytology, Karolinska University Hospital, Stockholm, Sweden
| | - Inger Bodin
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Setia Pramana
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
- Sekolah Tinggi Ilmu Statistik/Institute of Statistics, Jakarta, Indonesia
| | - Yudi Pawitan
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Monica Nistér
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Clinical Pathology/Cytology, Karolinska University Hospital, Stockholm, Sweden
| | - Sten Nilsson
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Clinical Oncology, Karolinska University Hospital, Stockholm, Sweden
| | - Chunde Li
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Clinical Oncology, Karolinska University Hospital, Stockholm, Sweden
- Chundsell Medicals AB, Stockholm, Sweden
- * E-mail:
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885
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Mandalos N, Rhinn M, Granchi Z, Karampelas I, Mitsiadis T, Economides AN, Dollé P, Remboutsika E. Sox2 acts as a rheostat of epithelial to mesenchymal transition during neural crest development. Front Physiol 2014; 5:345. [PMID: 25309446 PMCID: PMC4162359 DOI: 10.3389/fphys.2014.00345] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 08/22/2014] [Indexed: 12/19/2022] Open
Abstract
Precise control of self-renewal and differentiation of progenitor cells into the cranial neural crest (CNC) pool ensures proper head development, guided by signaling pathways such as BMPs, FGFs, Shh and Notch. Here, we show that murine Sox2 plays an essential role in controlling progenitor cell behavior during craniofacial development. A “Conditional by Inversion” Sox2 allele (Sox2COIN) has been employed to generate an epiblast ablation of Sox2 function (Sox2EpINV). Sox2EpINV/+(H) haploinsufficient and conditional (Sox2EpINV/mosaic) mutant embryos proceed beyond gastrulation and die around E11. These mutant embryos exhibit severe anterior malformations, with hydrocephaly and frontonasal truncations, which could be attributed to the deregulation of CNC progenitor cells during their epithelial to mesenchymal transition. This irregularity results in an exacerbated and aberrant migration of Sox10+ NCC in the branchial arches and frontonasal process of the Sox2 mutant embryos. These results suggest a novel role for Sox2 as a regulator of the epithelial to mesenchymal transitions (EMT) that are important for the cell flow in the developing head.
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Affiliation(s)
- Nikolaos Mandalos
- Stem Cell Biology Laboratory, Division of Molecular Biology and Genetics, Biomedical Sciences Research Centre "Alexander Fleming" Vari-Attica, Greece
| | - Muriel Rhinn
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM, U964, CNRS, UMR7104, Université de Strasbourg Illkirch, France
| | - Zoraide Granchi
- Orofacial Development and Regeneration Unit, Faculty of Medicine, Institute of Oral Biology, University of Zurich, ZZM Zurich, Switzerland
| | - Ioannis Karampelas
- Stem Cell Biology Laboratory, Division of Molecular Biology and Genetics, Biomedical Sciences Research Centre "Alexander Fleming" Vari-Attica, Greece ; Department of Neurosurgery, University Hospitals Case Medical Center Cleveland, OH, USA
| | - Thimios Mitsiadis
- Orofacial Development and Regeneration Unit, Faculty of Medicine, Institute of Oral Biology, University of Zurich, ZZM Zurich, Switzerland
| | | | - Pascal Dollé
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM, U964, CNRS, UMR7104, Université de Strasbourg Illkirch, France
| | - Eumorphia Remboutsika
- Stem Cell Biology Laboratory, Division of Molecular Biology and Genetics, Biomedical Sciences Research Centre "Alexander Fleming" Vari-Attica, Greece
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886
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Chen Y, Chen J, Chen H, Hong Z, Zhu X, Zhuo S, Chen Y, Chen J. Multiphoton microscopy as a diagnostic imaging modality for pancreatic neoplasms without hematoxylin and eosin stains. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:96008. [PMID: 25216027 DOI: 10.1117/1.jbo.19.9.096008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 08/11/2014] [Indexed: 05/11/2023]
Abstract
Hematoxylin and eosin (H&E) staining of tissue samples is the standard approach in histopathology for imaging and diagnosing cancer. Recent reports have shown that multiphoton microscopy (MPM) provides better sample interface with single-cell resolution, which enhances traditional H&E staining and offers a powerful diagnostic tool with potential applications in oncology. The purpose of this study was to further expand the versatility of MPM by establishing the optical parameters required for imaging unstained histological sections of pancreatic neoplasms, thereby providing an efficient and environmentally sustainable alternative to H&E staining while improving the accuracy of pancreatic cancer diagnoses. We found that the high-resolution MPM images clearly distinguish between the structure of normal pancreatic tissues compared with pancreatic neoplasms in unstained histological sections, and discernable differences in tissue architecture and cell morphology between normal versus tumorigenic cells led to enhanced optical diagnosis of cancerous tissue. Moreover, quantitative assessment of the cytomorphological features visualized from MPM images showed significant differences in the nuclear–cytoplasmic ratios of pancreatic neoplasms compared with normal pancreas, as well as further distinguished pancreatic malignant tumors from benign tumors. These results indicate that the MPM could potentially serve as an optical tool for the diagnosis of pancreatic neoplasms in unstained histological sections.
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Affiliation(s)
- Youting Chen
- The First Affiliated Hospital of Fujian Medical University, Department of Hepatobiliary Surgery, Fuzhou 350005, China
| | - Jing Chen
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Institute of Laser and Optoelectronics Technology, Fuzhou 350007, China
| | - Hong Chen
- The First Affiliated Hospital of Fujian Medical University, Department of Pathology, Fuzhou 350005, China
| | - Zhipeng Hong
- The First Affiliated Hospital of Fujian Medical University, Department of Hepatobiliary Surgery, Fuzhou 350005, China
| | - Xiaoqin Zhu
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Institute of Laser and Optoelectronics Technology, Fuzhou 350007, China
| | - Shuangmu Zhuo
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Institute of Laser and Optoelectronics Technology, Fuzhou 350007, China
| | - Yanling Chen
- The Affiliated Union Hospital of Fujian Medical University, Department of Hepatobiliary Surgery, Fuzhou 350001, China
| | - Jianxin Chen
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Institute of Laser and Optoelectronics Technology, Fuzhou 350007, China
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887
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Stölting MNL, Hefermehl LJ, Tremp M, Azzabi F, Sulser T, Eberli D. The role of donor age and gender in the success of human muscle precursor cell transplantation. J Tissue Eng Regen Med 2014; 11:447-458. [PMID: 25052735 DOI: 10.1002/term.1935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 02/14/2014] [Accepted: 05/21/2014] [Indexed: 11/09/2022]
Abstract
Autologous cell transplantation for the treatment of muscle damage is envisioned to involve the application of muscle precursor cells (MPCs) isolated from adult skeletal muscle. At the onset of trauma, these cells are recruited to proliferate and rebuild injured muscle fibres. However, a variety of donor-specific cues may directly influence the yield and quality of cells isolated from a muscle biopsy. In this study, we isolated human MPCs and assessed the role of donor gender and age on the ability of these MPCs to form functional bioengineered muscle. We analysed the cell yield, growth and molecular expression in vitro, and the muscle tissue formation and contractility of the bioengineered muscle, from cells isolated from men and women in three different age groups: young (20-39 years), adult (40-59 years) and elderly (60-80 years). Our results suggest that human MPCs can be successfully isolated and grown from patients of all ages and both genders. However, young female donors provide fast-growing cells in vitro with an optimum contractile output in vivo and are therefore an ideal cell source for muscle reconstruction. Taken together, these findings describe the donor-related limitations of MPC transplantation and provide insights for a straightforward and unbiased clinical application of these cells for muscle reconstruction. Copyright © 2014 John Wiley & Sons, Ltd.
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Affiliation(s)
- Meline N L Stölting
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
| | - Lukas J Hefermehl
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
| | - Mathias Tremp
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
| | - Fahd Azzabi
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
| | - Tullio Sulser
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
| | - Daniel Eberli
- Laboratory for Urologic Tissue Engineering and Stem Cell Therapy, Division of Urology, University of Zurich, Switzerland
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888
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Sowah D, Brown BF, Quon A, Alvarez BV, Casey JR. Resistance to cardiomyocyte hypertrophy in ae3-/- mice, deficient in the AE3 Cl-/HCO3- exchanger. BMC Cardiovasc Disord 2014; 14:89. [PMID: 25047106 PMCID: PMC4120010 DOI: 10.1186/1471-2261-14-89] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 07/16/2014] [Indexed: 12/21/2022] Open
Abstract
Background Cardiac hypertrophy is central to the etiology of heart failure. Understanding the molecular pathways promoting cardiac hypertrophy may identify new targets for therapeutic intervention. Sodium-proton exchanger (NHE1) activity and expression levels in the heart are elevated in many models of hypertrophy through protein kinase C (PKC)/MAPK/ERK/p90RSK pathway stimulation. Sustained NHE1 activity, however, requires an acid-loading pathway. Evidence suggests that the Cl−/HCO3− exchanger, AE3, provides this acid load. Here we explored the role of AE3 in the hypertrophic growth cascade of cardiomyocytes. Methods AE3-deficient (ae3−/−) mice were compared to wildtype (WT) littermates to examine the role of AE3 protein in the development of cardiomyocyte hypertrophy. Mouse hearts were assessed by echocardiography. As well, responses of cultured cardiomyocytes to hypertrophic stimuli were measured. pH regulation capacity of ae3−/− and WT cardiomyocytes was assessed in cultured cells loaded with the pH-sensitive dye, BCECF-AM. Results ae3−/− mice were indistinguishable from wild type (WT) mice in terms of cardiovascular performance. Stimulation of ae3−/− cardiomyocytes with hypertrophic agonists did not increase cardiac growth or reactivate the fetal gene program. ae3−/− mice are thus protected from pro-hypertrophic stimulation. Steady state intracellular pH (pHi) in ae3−/− cardiomyocytes was not significantly different from WT, but the rate of recovery of pHi from imposed alkalosis was significantly slower in ae3−/− cardiomyocytes. Conclusions These data reveal the importance of AE3-mediated Cl−/HCO3− exchange in cardiovascular pH regulation and the development of cardiomyocyte hypertrophy. Pharmacological antagonism of AE3 is an attractive approach in the treatment of cardiac hypertrophy.
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Affiliation(s)
| | | | | | | | - Joseph R Casey
- Department of Biochemistry and Membrane Protein Disease Research Group, University of Alberta, Edmonton T6G 2H7, Canada.
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889
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Wagner A, Holland OJ, Tong M, Shelling AN, Chamley LW. The role of SPRASA in female fertility. Reprod Sci 2014; 22:452-61. [PMID: 25038051 DOI: 10.1177/1933719114542009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Fertility is a complex process and infertility can have many causes. Sperm protein reactive with antisperm antibody (SPRASA)/sperm lysozyme-like protein 1 is a protein discovered as the target of autoantibodies in infertile men and previously thought to be expressed only in sperm. Using a bovine in vitro fertilization model, we have shown that SPRASA antiserum reduced sperm binding to zona-free oocytes and the development of embryos to morulae but did not affect the postfertilization cleavage rate to 2 cells or sperm motility. We demonstrated that SPRASA was expressed in ovarian follicles, corpora lutea, and oocytes by a combination of reverse transcription-polymerase chain reaction and immunohistochemistry. Female mice immunized with SPRASA had profound infertility following timed matings and those mice that did become pregnant had reduced fetal viability. The levels of antibodies reactive with SPRASA in 204 fertile and 202 infertile couples were elevated in 3 infertile but no fertile women. Together, these results indicate that SPRASA has a role in female fertility.
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Affiliation(s)
- Angela Wagner
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Olivia J Holland
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Mancy Tong
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Andrew N Shelling
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Lawrence W Chamley
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, School of Medicine, The University of Auckland, Auckland, New Zealand
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890
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Mosquera-Lopez C, Agaian S, Velez-Hoyos A, Thompson I. Computer-Aided Prostate Cancer Diagnosis From Digitized Histopathology: A Review on Texture-Based Systems. IEEE Rev Biomed Eng 2014; 8:98-113. [PMID: 25055385 DOI: 10.1109/rbme.2014.2340401] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Prostate cancer (PCa) is currently diagnosed by microscopic evaluation of biopsy samples. Since tissue assessment heavily relies on the pathologists level of expertise and interpretation criteria, it is still a subjective process with high intra- and interobserver variabilities. Computer-aided diagnosis (CAD) may have a major impact on detection and grading of PCa by reducing the pathologists reading time, and increasing the accuracy and reproducibility of diagnosis outcomes. However, the complexity of the prostatic tissue and the large volumes of data generated by biopsy procedures make the development of CAD systems for PCa a challenging task. The problem of automated diagnosis of prostatic carcinoma from histopathology has received a lot of attention. As a result, a number of CAD systems, have been proposed for quantitative image analysis and classification. This review aims at providing a detailed description of selected literature in the field of CAD of PCa, emphasizing the role of texture analysis methods in tissue description. It includes a review of image analysis tools for image preprocessing, feature extraction, classification, and validation techniques used in PCa detection and grading, as well as future directions in pursuit of better texture-based CAD systems.
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891
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Wu JB, Shao C, Li X, Li Q, Hu P, Shi C, Li Y, Chen YT, Yin F, Liao CP, Stiles BL, Zhau HE, Shih JC, Chung LWK. Monoamine oxidase A mediates prostate tumorigenesis and cancer metastasis. J Clin Invest 2014; 124:2891-908. [PMID: 24865426 DOI: 10.1172/jci70982] [Citation(s) in RCA: 163] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 04/03/2014] [Indexed: 01/13/2023] Open
Abstract
Tumors from patients with high-grade aggressive prostate cancer (PCa) exhibit increased expression of monoamine oxidase A (MAOA), a mitochondrial enzyme that degrades monoamine neurotransmitters and dietary amines. Despite the association between MAOA and aggressive PCa, it is unclear how MAOA promotes PCa progression. Here, we found that MAOA functions to induce epithelial-to-mesenchymal transition (EMT) and stabilize the transcription factor HIF1α, which mediates hypoxia through an elevation of ROS, thus enhancing growth, invasiveness, and metastasis of PCa cells. Knockdown and overexpression of MAOA in human PCa cell lines indicated that MAOA induces EMT through activation of VEGF and its coreceptor neuropilin-1. MAOA-dependent activation of neuropilin-1 promoted AKT/FOXO1/TWIST1 signaling, allowing FOXO1 binding at the TWIST1 promoter. Importantly, the MAOA-dependent HIF1α/VEGF-A/FOXO1/TWIST1 pathway was activated in high-grade PCa specimens, and knockdown of MAOA reduced or even eliminated prostate tumor growth and metastasis in PCa xenograft mouse models. Pharmacological inhibition of MAOA activity also reduced PCa xenograft growth in mice. Moreover, high MAOA expression in PCa tissues correlated with worse clinical outcomes in PCa patients. These findings collectively characterize the contribution of MAOA in PCa pathogenesis and suggest that MAOA has potential as a therapeutic target in PCa.
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892
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Costa A, Toschi A, Murfuni I, Pelosi L, Sica G, Adamo S, Scicchitano BM. Local overexpression of V1a-vasopressin receptor enhances regeneration in tumor necrosis factor-induced muscle atrophy. BIOMED RESEARCH INTERNATIONAL 2014; 2014:235426. [PMID: 24971321 PMCID: PMC4055243 DOI: 10.1155/2014/235426] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/22/2014] [Accepted: 04/23/2014] [Indexed: 01/25/2023]
Abstract
Skeletal muscle atrophy occurs during disuse and aging, or as a consequence of chronic diseases such as cancer and diabetes. It is characterized by progressive loss of muscle tissue due to hypotrophic changes, degeneration, and an inability of the regeneration machinery to replace damaged myofibers. Tumor necrosis factor (TNF) is a proinflammatory cytokine known to mediate muscle atrophy in many chronic diseases and to inhibit skeletal muscle regeneration. In this study, we investigated the role of Arg-vasopressin-(AVP-)dependent pathways in muscles in which atrophy was induced by local overexpression of TNF. AVP is a potent myogenesis-promoting factor and is able to enhance skeletal muscle regeneration by stimulating Ca(2+)/calmodulin-dependent kinase and calcineurin signaling. We performed morphological and molecular analyses and demonstrated that local over-expression of the AVP receptor V1a enhances regeneration of atrophic muscle. By upregulating the regeneration/differentiation markers, modulating the inflammatory response, and attenuating fibrogenesis, the stimulation of AVP-dependent pathways creates a favourable environment for efficient and sustained muscle regeneration and repair even in the presence of elevated levels of TNF. This study highlights a novel in vivo role for AVP-dependent pathways, which may represent an interesting strategy to counteract muscle decline in aging or in muscular pathologies.
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Affiliation(s)
- Alessandra Costa
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
| | - Angelica Toschi
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
| | - Ivana Murfuni
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
| | - Laura Pelosi
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
| | - Gigliola Sica
- Institute of Histology and Embryology, Catholic University School of Medicine, L.go F. Vito, 1, 00168 Rome, Italy
| | - Sergio Adamo
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
| | - Bianca Maria Scicchitano
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy
- Institute of Histology and Embryology, Catholic University School of Medicine, L.go F. Vito, 1, 00168 Rome, Italy
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893
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Atale N, Gupta S, Yadav UCS, Rani V. Cell-death assessment by fluorescent and nonfluorescent cytosolic and nuclear staining techniques. J Microsc 2014; 255:7-19. [PMID: 24831993 DOI: 10.1111/jmi.12133] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 04/09/2014] [Indexed: 01/08/2023]
Abstract
Apoptosis, a genetically programmed cellular event leads to biochemical and morphological changes in cells. Alterations in DNA caused by several factors affect nucleus and ultimately the entire cell leading to compromised function of the organ and organism. DNA, a master regulator of the cellular events, is an important biomolecule with regards to cell growth, cell death, cell migration and cell differentiation. It is therefore imperative to develop the staining techniques that may lead to visualize the changes in nucleus where DNA is housed, to comprehend the cellular pathophysiology. Over the years a number of nuclear staining techniques such as propidium iodide, Hoechst-33342, 4', 6-diamidino-2-phenylindole (DAPI), Acridine orange-Ethidium bromide staining, among others have been developed to assess the changes in DNA. Some nonnuclear staining techniques such as Annexin-V staining, which although does not stain DNA, but helps to identify the events that result from DNA alteration and leads to initiation of apoptotic cell death. In this review, we have briefly discussed some of the most commonly used fluorescent and nonfluorescent staining techniques that identify apoptotic changes in cell, DNA and the nucleus. These techniques help in differentiating several cellular and nuclear phenotypes that result from DNA damage and have been identified as specific to necrosis or early and late apoptosis as well as scores of other nuclear deformities occurring inside the cells.
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Affiliation(s)
- N Atale
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India
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894
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Marto J, Baltazar D, Duarte A, Fernandes A, Gouveia L, Militão M, Salgado A, Simões S, Oliveira E, Ribeiro HM. Topical gels of etofenamate: in vitro and in vivo evaluation. Pharm Dev Technol 2014; 20:710-5. [PMID: 24798887 DOI: 10.3109/10837450.2014.915571] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Non-steroid anti-inflammatory drugs (NSAIDs), such as etofenamate, are among the most prescribed drugs used for their analgesic, anti-rheumatic, antipyretic and anti-inflammatory properties. Topical formulations have the main advantage of targeted delivery. However, drugs must overcome the skin due to its role as a physical and chemical barrier against the penetration of chemicals and microorganisms. This barrier must be altered to allow the permeation of drugs at a suitable rate to the desired site of activity. Permeation modulators can intercalate the skin outer layers causing structure disruption, opening an energetically favourable route for the drug to diffuse through. The aim of this work was the development of hydroalcoholic gels containing 5.0% (w/w) of etofenamate for topical administration with anti-inflammatory activity and enhanced drug delivery. The physical and chemical characterization, in vitro release and permeation studies and in vivo anti-inflammatory activity were assessed. The gel with 30% ethanol showed in vivo anti-inflammatory activity with suitable physical chemical and microbiologic characteristics. In vitro release and permeation studies revealed that the different amounts of ethanol used influenced the release profiles of etofenamate. Moreover, it was demonstrated that this formulation is an adequate vehicle for the etofenamate skin permeation.
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Affiliation(s)
- Joana Marto
- Pharmaceutics, Faculdade de Farmácia da Universidade de Lisboa, Instituto de Investigação do Medicamento (iMed.ULisboa) , Lisboa , Portugal
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895
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Proteomic study of differential protein expression in mouse lung tissues after aerosolized ricin poisoning. Int J Mol Sci 2014; 15:7281-92. [PMID: 24786090 PMCID: PMC4057672 DOI: 10.3390/ijms15057281] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/31/2014] [Accepted: 04/14/2014] [Indexed: 11/16/2022] Open
Abstract
Ricin is one of the most poisonous natural toxins from plants and is classified as a Class B biological threat pathogen by the Centers for Disease Control and Prevention (CDC) of U.S.A. Ricin exposure can occur through oral or aerosol routes. Ricin poisoning has a rapid onset and a short incubation period. There is no effective treatment for ricin poisoning. In this study, an aerosolized ricin-exposed mouse model was developed and the pathology was investigated. The protein expression profile in the ricin-poisoned mouse lung tissue was analyzed using proteomic techniques to determine the proteins that were closely related to the toxicity of ricin. 2D gel electrophoresis, mass spectrometry and subsequent biological functional analysis revealed that six proteins including Apoa1 apolipoprotein, Ywhaz 14-3-3 protein, Prdx6 Uncharacterized Protein, Selenium-binding protein 1, HMGB1, and DPYL-2, were highly related to ricin poisoning.
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896
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Choi YM, Suh Y, Shin S, Lee K. Skeletal muscle characterization of Japanese quail line selectively bred for lower body weight as an avian model of delayed muscle growth with hypoplasia. PLoS One 2014; 9:e95932. [PMID: 24763754 PMCID: PMC3999150 DOI: 10.1371/journal.pone.0095932] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Accepted: 04/02/2014] [Indexed: 01/17/2023] Open
Abstract
This study was designed to extensively characterize the skeletal muscle development in the low weight (LW) quail selected from random bred control (RBC) Japanese quail in order to provide a new avian model of impaired and delayed growth in physically normal animals. The LW line had smaller embryo and body weights than the RBC line in all age groups (P<0.05). During 3 to 42 d post-hatch, the LW line exhibited approximately 60% smaller weight of pectoralis major muscle (PM), mainly resulting from lower fiber numbers compared to the RBC line (P<0.05). During early post-hatch period when myotubes are still actively forming, the LW line showed impaired PM growth with prolonged expression of Pax7 and lower expression levels of MyoD, Myf-5, and myogenin (P<0.05), likely leading to impairment of myogenic differentiation and consequently, reduced muscle fiber formation. Additionally, the LW line had delayed transition of neonatal to adult myosin heavy chain isoform, suggesting delayed muscle maturation. This is further supported by the finding that the LW line continued to grow unlike the RBC line; difference in the percentages of PMW to body weights between both quail lines diminished with increasing age from 42 to 75 d post-hatch. This delayed muscle growth in the LW line is accompanied by higher levels of myogenin expression at 42 d (P<0.05), higher percentage of centered nuclei at 42 d (P<0.01), and greater rate of increase in fiber size between 42 and 75 d post-hatch (P<0.001) compared to the RBC line. Analysis of physiological, morphological, and developmental parameters during muscle development of the LW quail line provided a well-characterized avian model for future identification of the responsible genes and for studying mechanisms of hypoplasia and delayed muscle growth.
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Affiliation(s)
- Young Min Choi
- Department of Animal Sciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Yeunsu Suh
- Department of Animal Sciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Sangsu Shin
- Department of Animal Sciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Kichoon Lee
- Department of Animal Sciences, The Ohio State University, Columbus, Ohio, United States of America
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897
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Alves Da Silva D, Cavalcanti MAR, Muniz De Oliveira F, Trentini MM, Junqueira-Kipnis AP, Kipnis A. Immunogenicity of a recombinant Mycobacterium smegmatis vaccine expressing the fusion protein CMX in cattle from Goiás State, Brazil. J Vet Med Sci 2014; 76:977-84. [PMID: 24681608 PMCID: PMC4143659 DOI: 10.1292/jvms.13-0338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study aimed to evaluate the immunogenicity of a recombinant Mycobacterium smegmatis vaccine expressing the CMX fusion protein composed of immunodominant epitopes Ag85C, MPT51 and HspX of Mycobacterium tuberculosis, which are important mycobacteria virulence factors. A group of Nelore heifers that were 10 to 12 months of age and negative for the tuberculin skin test (TST) were immunized with four doses of the recombinant vaccine mc(2)-CMX (M. smegmatis-Ag85C-MPT51-HspX) during a period of one year. Before each immunization, blood was collected to obtain sera for antibody analysis. Serological analysis demonstrated that mc(2)-CMX was able to induce a humoral response with increased levels of specific IgG antibodies against CMX, despite minimum antibody levels being detected for individual Ag85C, MPT51 or HspX recombinant antigens. However, there was no significant increase in specific CD4(+) IFN-γ-positive T cells. Lymphadenomegaly was observed in superficial cervical lymph nodes adjacent to the site of vaccination among mc(2)-CMX-vaccinated bovines, and the histopathological analysis demonstrated follicular hyperplasia without inflammatory infiltrate or granuloma formation. Animals remained negative for the TST until the end of the experiments, showing no cross-reactivity with the recombinant vaccine and tuberculin proteins. We discuss the potential of mc(2)-CMX to induce an immune response in cattle.
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Affiliation(s)
- Duanne Alves Da Silva
- Tropical Pathology and Public Health Institute, Federal University of Goiás, Rua 235 esquina com 1a Avenida, Setor Universitário, Goiânia, Goiás, CEP 74605-050, Brazil
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898
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Wang JF, Mao XY, Zhao C. The changes of serum proteome and tissular pathology in mouse induced by botulinum toxin E injection. Mol Biol Rep 2014; 41:2509-19. [PMID: 24458824 DOI: 10.1007/s11033-014-3109-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
Abstract
The experiment were performed to investigate the poisoning-related proteins and main pathological changes after mouse suffered from injection of botulinum toxin serotype E. Dose of 0.75 LD50 botulinum toxin serotype E per mice were administrated by intraperitoneal injection. Survival mouse were picked as experimental group. The blood were collected from orbital blood and serum sample was separated by centrifugation. The heart, liver, spleen, lung, kidney were fixed in 10 % neutral buffered formalin and then developed paraffin sections. Serum protein components were analyzed by SDS-PAGE gel electrophoresis coupled with 2-DE SDS-PAGE gel electrophoresis. Differentially expressed proteins were analyzed by PDQUest8.0 software and subjected to ion trap mass spectrometry equipped with a high performance liquid chromatography system. The observation of pathological section showed that heart, liver, spleen, lung, kidney exhibited pathological changes in different degree, especially in heart, liver and lung tissues. Heart muscle tissue display serious inflammatory response, heart muscle fiber compulsively expanded and filled with erythrocyte and inflammatory exudates, some heart muscle fiber ruptured, even necrosis; hepatic cell in edge of liver occur apoptosis and some hepatic cell have disintegrated, and even died; pulmonary alveoli broken and partial vein filled with blood. Serum proteins component present a significant changes between control serum and botulism in 24 h by SDS-PAGE gel electrophoresis and 2-DE-SDS-PAGE gel electrophoresis. Twenty differentially expressed protein spots were observed in 2-DE profiles, in which 14 protein spots were undetectable in serum proteome under botulism, 3 protein spots exclusively expressed in state of botulism, 3 protein spots were low-expressed in serum proteome under botulism. Fourteen proteins have been identified among 20 spots elected on two-dimensional electrophoresis gels. Crystal proteins family exclusively expressed in control group serum. Haptoglobin were low-expressed under botulism in serum protein components, however, serum amyloid A only expressed in serum sample under botulism in 24 h, which were verified by Western-blot. Identified proteins involved in energy metabolism, cellular stress response, transcription, body defense and cell proliferation. These findings represent the first report of BoNT-induced changes in serum proteome and histopathology, and reinforce the utility of applying proteomic tools to the study of system-wide biological processes in normal and botulism.
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Affiliation(s)
- J F Wang
- The Department of the 5th Research, Lanzhou Institute of Biological Products, Ltd, Co, Lanzhou, 730046, Gansu, China,
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899
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Novel analogue of colchicine induces selective pro-death autophagy and necrosis in human cancer cells. PLoS One 2014; 9:e87064. [PMID: 24466327 PMCID: PMC3900699 DOI: 10.1371/journal.pone.0087064] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 12/19/2013] [Indexed: 02/06/2023] Open
Abstract
Colchicine, a natural product of Colchicum autumnae currently used for gout treatment, is a tubulin targeting compound which inhibits microtubule formation by targeting fast dividing cells. This tubulin-targeting property has lead researchers to investigate the potential of colchicine and analogs as possible cancer therapies. One major study conducted on an analogue of allocolchicine, ZD 6126, was halted in phase 2 clinical trials due to severe cardio-toxicity associated with treatment. This study involves the development and testing of novel allocolchicine analogues that hold non-toxic anti-cancer properties. Currently we have synthesized and evaluated the anti-cancer activities of two analogues; N-acetyl-O-methylcolchinol (NSC 51046 or NCME), which is structurally similar to ZD 6126, and (S)-3,8,9,10-tetramethoxyallocolchicine (Green 1), which is a novel derivative of allocolchicine that is isomeric in the A ring. NSC 51046 was found to be non-selective as it induced apoptosis in both BxPC-3 and PANC-1 pancreatic cancer cells and in normal human fibroblasts. Interestingly, we found that Green 1 was able to modestly induce pro-death autophagy in these pancreatic cancer cells and E6-1 leukemia cells but not in normal human fibroblasts. Unlike colchicine and NSC 51046, Green 1 does not appear to affect tubulin polymerization indicating that it has a different molecular target. Green 1 also caused increased reactive oxygen species (ROS) production in mitochondria isolated from pancreatic cancer cells. Furthermore, in vivo studies revealed that Green 1 was well tolerated in mice. Our findings suggest that a small change in the structure of colchicine has apparently changed the mechanism of action and lead to improved selectivity. This may lead to better selective treatments in cancer therapy.
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900
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Wolmarans E, Sippel K, McKenna R, Joubert A. Induction of the intrinsic apoptotic pathway via a new antimitotic agent in an esophageal carcinoma cell line. Cell Biosci 2014; 4:68. [PMID: 25937890 PMCID: PMC4417530 DOI: 10.1186/2045-3701-4-68] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 11/02/2014] [Indexed: 11/29/2022] Open
Abstract
Background 2-Ethyl-3-O-sulphamoyl-estra-1,3,5(10)16-tetraene (ESE-16) is a unique, in silico-designed compound with possible anticancer properties, which were identified in our laboratory. This compound is capable of interfering with microtubule dynamics and is believed to have potential carbonic anhydrase IX inhibiting activity. In this study, it was investigated whether ESE-16 is capable of inducing apoptosis in vitro in the esophageal carcinoma SNO cell line via the intrinsic pathway at a concentration of 0.2 μM with an exposure time of 24 hours. Results Qualitative results were obtained via light microscopy, transmission electron microscopy and confocal microscopy. Results showed hallmarks of apoptosis in the ESE-16-treated cells. In addition, data revealed an increase in the number of ESE-16-treated cells blocked in metaphase. Cell death via apoptosis in the ESE-16-treated cells was confirmed by studying the internal ultrastructure of the cells via transmission electron microscopy, while confocal microscopy revealed abnormal spindle formation and condensed chromatin in ESE-16-treated cells, thus confirming metaphase block. Quantitative results were obtained via flow cytometry and spectrophotometry. Cell death via apoptosis in ESE-16-treated cells was quantitatively confirmed by the Annexin V-FITC apoptosis detection assay. Flow cytometry and spectrophotometry revealed dissipation of mitochondrial membrane potential and an increase in superoxide levels in the ESE-16-treated cells when compared to the relevant controls. Both initiator caspase 9 and effector caspase 3 activities were increased, which demonstrates that ESE-16 causes cell death in a caspase-dependent manner. Conclusions This was the first in vitro study conducted to investigate the action mechanism of ESE-16 on an esophageal carcinoma cell line. The results provided valuable information on the action mechanism of this potential anticancer agent. It can be concluded that the novel in silico-designed compound exerts an anti-proliferative effect on the esophageal carcinoma SNO cell line by disrupting microtubule function resulting in metaphase block. This culminates in apoptotic cell death via the intrinsic apoptotic pathway. This research provided cellular targets warranting in vivo assessment of ESE-16’s potential as an anticancer agent.
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Affiliation(s)
- Elize Wolmarans
- Department of Physiology, University of Pretoria, Pretoria, South Africa
| | - Katherine Sippel
- Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas USA
| | - Robert McKenna
- McKnight Institute, University of Florida, Gainesville, Florida USA
| | - Annie Joubert
- Department of Physiology, University of Pretoria, Pretoria, South Africa
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