1
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Xia Y, Ling AL, Zhang W, Lee A, Su MC, Gruener RF, Jena S, Huang Y, Pareek S, Shan Y, Huang RS. A Web Application for Predicting Drug Combination Efficacy Using Monotherapy Data and IDACombo. J Cancer Sci Clin Ther 2023; 7:253-258. [PMID: 38344217 PMCID: PMC10852200 DOI: 10.26502/jcsct.5079218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
We recently reported a computational method (IDACombo) designed to predict the efficacy of cancer drug combinations using monotherapy response data and the assumptions of independent drug action. Given the strong agreement between IDACombo predictions and measured drug combination efficacy in vitro and in clinical trials, we believe IDACombo can be of immediate use to researchers who are working to develop novel drug combinations. While we previously released our method as an R package, we have now created an R Shiny application to allow researchers without programming experience to easily utilize this method. The app provides a graphical interface which enables users to easily generate efficacy predictions with IDACombo using provided data from several high-throughput cell line screens or using custom, user-provided data.
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Affiliation(s)
- Yunong Xia
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Alexander L Ling
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
- Harvey Cushing Neuro-oncology Laboratories, Department of Neurosurgery, Hale Building for Transformative Medicine, 4th and 8th floor, Brigham and Women's Hospital; 60 Fenwood Road, Boston, MA 02116
| | - Weijie Zhang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Adam Lee
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mei-Chi Su
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Robert F Gruener
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Sampreeti Jena
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yingbo Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Siddhika Pareek
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yuting Shan
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - R Stephanie Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
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2
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Ling AL, Zhang W, Lee A, Xia Y, Su MC, Gruener RF, Jena S, Huang Y, Pareek S, Shan Y, Stephanie Huang R. Simplicity: Web-Based Visualization and Analysis of High-Throughput Cancer Cell Line Screens. J Cancer Sci Clin Ther 2023; 7:249-252. [PMID: 38435702 PMCID: PMC10906814 DOI: 10.26502/jcsct.5079217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
High-throughput drug screens are a powerful tool for cancer drug development. However, the results of such screens are often made available only as raw data, which is intractable for researchers without informatics skills, or as highly processed summary statistics, which can lack essential information for translating screening results into clinically meaningful discoveries. To improve the usability of these datasets, we developed Simplicity, a robust and user-friendly web interface for visualizing, exploring, and summarizing raw and processed data from high- throughput drug screens. Importantly, Simplicity allows for easy recalculation of summary statistics at user-defined drug concentrations. This allows Simplicity's outputs to be used with methods that rely on statistics being calculated at clinically relevant doses. Simplicity can be freely accessed at https://oncotherapyinformatics.org/simplicity/.
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Affiliation(s)
- Alexander L Ling
- Harvey Cushing Neuro-oncology Laboratories, Department of Neurosurgery, Hale Building for Transformative Medicine, 4th and 8th floor, Brigham and Women's Hospital; 60 Fenwood Road, Boston, MA 02116
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Weijie Zhang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Adam Lee
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yunong Xia
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mei-Chi Su
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Robert F Gruener
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Sampreeti Jena
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yingbo Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Siddhika Pareek
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yuting Shan
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - R Stephanie Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
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3
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Ling AL, Zhang W, Lee A, Xia Y, Su MC, Gruener RF, Jena S, Huang Y, Pareek S, Shan Y, Huang RS. Simplicity: web-based visualization and analysis of high-throughput cancer cell line screens. bioRxiv 2023:2023.09.08.556619. [PMID: 37745579 PMCID: PMC10515753 DOI: 10.1101/2023.09.08.556619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
High-throughput drug screens are a powerful tool for cancer drug development. However, the results of such screens are often made available only as raw data, which is intractable for researchers without informatic skills, or as highly processed summary statistics, which can lack essential information for translating screening results into clinically meaningful discoveries. To improve the usability of these datasets, we developed Simplicity, a robust and user-friendly web interface for visualizing, exploring, and summarizing raw and processed data from high-throughput drug screens. Importantly, Simplicity allows for easy recalculation of summary statistics at user-defined drug concentrations. This allows Simplicity's outputs to be used with methods that rely on statistics being calculated at clinically relevant doses. Simplicity can be freely accessed at https://oncotherapyinformatics.org/simplicity/.
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Affiliation(s)
- Alexander L. Ling
- Harvey Cushing Neuro-oncology Laboratories, Department of Neurosurgery, Hale Building for Transformative Medicine, 4th and 8th floor, Brigham and Women’s Hospital; 60 Fenwood Road, Boston, MA 02116
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Weijie Zhang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Adam Lee
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yunong Xia
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mei-Chi Su
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Robert F. Gruener
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Sampreeti Jena
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yingbo Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Siddhika Pareek
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Yuting Shan
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - R. Stephanie Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
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4
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Janečková E, Feng J, Guo T, Han X, Ghobadi A, Araujo-Villalba A, Rahman MS, Ziaei H, Ho TV, Pareek S, Alvarez J, Chai Y. Canonical Wnt signaling regulates soft palate development by mediating ciliary homeostasis. Development 2023; 150:dev201189. [PMID: 36825984 PMCID: PMC10108707 DOI: 10.1242/dev.201189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 02/10/2023] [Indexed: 02/25/2023]
Abstract
Craniofacial morphogenesis requires complex interactions involving different tissues, signaling pathways, secreted factors and organelles. The details of these interactions remain elusive. In this study, we have analyzed the molecular mechanisms and homeostatic cellular activities governing soft palate development to improve regenerative strategies for individuals with cleft palate. We have identified canonical Wnt signaling as a key signaling pathway primarily active in cranial neural crest (CNC)-derived mesenchymal cells surrounding soft palatal myogenic cells. Using Osr2-Cre;β-cateninfl/fl mice, we show that Wnt signaling is indispensable for mesenchymal cell proliferation and subsequently for myogenesis through mediating ciliogenesis. Specifically, we have identified that Wnt signaling directly regulates expression of the ciliary gene Ttll3. Impaired ciliary disassembly leads to differentiation defects in mesenchymal cells and indirectly disrupts myogenesis through decreased expression of Dlk1, a mesenchymal cell-derived pro-myogenesis factor. Moreover, we show that siRNA-mediated reduction of Ttll3 expression partly rescues mesenchymal cell proliferation and myogenesis in the palatal explant cultures from Osr2-Cre;β-cateninfl/fl embryos. This study highlights the role of Wnt signaling in palatogenesis through the control of ciliary homeostasis, which establishes a new mechanism for Wnt-regulated craniofacial morphogenesis.
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Affiliation(s)
- Eva Janečková
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Jifan Feng
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Tingwei Guo
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Xia Han
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Aileen Ghobadi
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Angelita Araujo-Villalba
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Md Shaifur Rahman
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Heliya Ziaei
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Thach-Vu Ho
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Siddhika Pareek
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Jasmine Alvarez
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
| | - Yang Chai
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA
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5
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Pareek S, Sanchenkova X, Sakaguchi T, Murakami M, Okumura R, Kayama H, Kawauchi S, Motooka D, Nakamura S, Okuzaki D, Kishimoto T, Takeda K. Epithelial miR‐215 negatively modulates Th17‐dominant inflammation by inhibiting CXCL12 production in the small intestine. Genes Cells 2022; 27:243-253. [DOI: 10.1111/gtc.12922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Siddhika Pareek
- Regenerative Medicine Institute Cedars‐Sinai Medical Center Los Angeles CA 90048 USA
| | - Xenia Sanchenkova
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
| | - Taiki Sakaguchi
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
| | - Mari Murakami
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
| | - Ryu Okumura
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
| | - Hisako Kayama
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
- Institute for Advanced Co‐Creation Studies Osaka University Osaka 5650871 Japan
| | - Saya Kawauchi
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
| | - Daisuke Motooka
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Genome Information Research Center Research Institute for Microbial Diseases Osaka University Osaka 5650871 Japan
| | - Shota Nakamura
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Genome Information Research Center Research Institute for Microbial Diseases Osaka University Osaka 5650871 Japan
| | - Daisuke Okuzaki
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Genome Information Research Center Research Institute for Microbial Diseases Osaka University Osaka 5650871 Japan
| | - Tadamitsu Kishimoto
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
| | - Kiyoshi Takeda
- WPI Immunology Frontier Research Center Osaka University Osaka 5650871 Japan
- Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine Osaka University Osaka 5650871 Japan
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6
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Feng J, Han X, Yuan Y, Cho CK, Janečková E, Guo T, Pareek S, Rahman MS, Zheng B, Bi J, Jing J, Zhang M, Xu J, Ho TV, Chai Y. TGF-β signaling and Creb5 cooperatively regulate Fgf18 to control pharyngeal muscle development. eLife 2022; 11:80405. [PMID: 36542062 PMCID: PMC9771365 DOI: 10.7554/elife.80405] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
The communication between myogenic cells and their surrounding connective tissues is indispensable for muscle morphogenesis. During late embryonic development in mice, myogenic progenitors migrate to discrete sites to form individual muscles. The detailed mechanism of this process remains unclear. Using mouse levator veli palatini (LVP) development as a model, we systematically investigated how a distinct connective tissue subpopulation, perimysial fibroblasts, communicates with myogenic cells to regulate mouse pharyngeal myogenesis. Using single-cell RNAseq data analysis, we identified that TGF-β signaling is a key regulator for the perimysial fibroblasts. Loss of TGF-β signaling in the neural crest-derived palatal mesenchyme leads to defects in perimysial fibroblasts and muscle malformation in the soft palate in Osr2Cre;Tgfbr1fl/fl mice. In particular, Creb5, a transcription factor expressed in the perimysial fibroblasts, cooperates with TGF-β signaling to activate expression of Fgf18. Moreover, Fgf18 supports pharyngeal muscle development in vivo and exogenous Fgf18 can partially rescue myogenic cell numbers in Osr2Cre;Tgfbr1fl/fl samples, illustrating that TGF-β-regulated Fgf18 signaling is required for LVP development. Collectively, our findings reveal the mechanism by which TGF-β signaling achieves its functional specificity in defining the perimysial-to-myogenic signals for pharyngeal myogenesis.
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Affiliation(s)
- Jifan Feng
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Xia Han
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Yuan Yuan
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Courtney Kyeong Cho
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Eva Janečková
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Tingwei Guo
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Siddhika Pareek
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Md Shaifur Rahman
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Banghong Zheng
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Jing Bi
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Junjun Jing
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Mingyi Zhang
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Jian Xu
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Thach-Vu Ho
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
| | - Yang Chai
- Center for Craniofacial Molecular Biology, University of Southern CaliforniaLos AngelesUnited States
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7
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Huang Y, Ling A, Pareek S, Huang RS. Oncogene or tumor suppressor? Long noncoding RNAs role in patient's prognosis varies depending on disease type. Transl Res 2021; 230:98-110. [PMID: 33152534 PMCID: PMC7936950 DOI: 10.1016/j.trsl.2020.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/14/2020] [Accepted: 10/29/2020] [Indexed: 12/11/2022]
Abstract
Functional studies of long noncoding RNAs (lncRNAs) are often performed in the context of only a single cancer type. However, the tissue-specific expression patterns of lncRNAs raise the question of whether lncRNA associations identified in one cancer type are relevant to other cancer types. Here, we examine the relationships between the expression levels of 50 cancer-related lncRNAs and survival data from 24 types of cancer in The Cancer Genome Atlas (TCGA) with the goal of identifying prognosis related lncRNAs. Our results suggest that high expression levels of certain lncRNAs are consistently associated with worse/better survival in a number of cancers, while other lncRNAs have different prognostic roles in different types of cancer. Our analysis also identifies 20 novel unadjusted associations that have not been reported before. In addition, in low-grade glioma (LGG), prognostic-related lncRNAs are identified after conditioning on known clinical biomarker and common therapy, revealing that 2 lncRNAs, FOXP4-AS1, and NEAT1, are associated with temozolomide response-a standard-of-care in LGG. Pathway analysis suggests NF-kB/STAT3 signaling pathway enrichment in LGG patients with high NEAT1 expression and DNA repair/myc gene set enrichment in LGG patients with high expression of FOXP4-AS1. Our work demonstrates the context dependency of lncRNAs across cancer types and highlights a number of lncRNAs as potential novel cancer prognosis markers.
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Affiliation(s)
- Yingbo Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota
| | - Alexander Ling
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota
| | - Siddhika Pareek
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota; Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, California
| | - R Stephanie Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota.
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Pareek S, Kurakawa T, Das B, Motooka D, Nakaya S, Rongsen-Chandola T, Goyal N, Kayama H, Dodd D, Okumura R, Maeda Y, Fujimoto K, Nii T, Ogawa T, Iida T, Bhandari N, Kida T, Nakamura S, Nair GB, Takeda K. Comparison of Japanese and Indian intestinal microbiota shows diet-dependent interaction between bacteria and fungi. NPJ Biofilms Microbiomes 2019; 5:37. [PMID: 31885873 PMCID: PMC6925221 DOI: 10.1038/s41522-019-0110-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/22/2019] [Indexed: 02/07/2023] Open
Abstract
The bacterial species living in the gut mediate many aspects of biological processes such as nutrition and activation of adaptive immunity. In addition, commensal fungi residing in the intestine also influence host health. Although the interaction of bacterium and fungus has been shown, its precise mechanism during colonization of the human intestine remains largely unknown. Here, we show interaction between bacterial and fungal species for utilization of dietary components driving their efficient growth in the intestine. Next generation sequencing of fecal samples from Japanese and Indian adults revealed differential patterns of bacterial and fungal composition. In particular, Indians, who consume more plant polysaccharides than Japanese, harbored increased numbers of Prevotella and Candida. Candida spp. showed strong growth responses to the plant polysaccharide arabinoxylan in vitro. Furthermore, the culture supernatants of Candida spp. grown with arabinoxylan promoted rapid proliferation of Prevotella copri. Arabinose was identified as a potential growth-inducing factor in the Candida culture supernatants. Candida spp. exhibited a growth response to xylose, but not to arabinose, whereas P. copri proliferated in response to both xylose and arabinose. Candida spp., but not P. copri, colonized the intestine of germ-free mice. However, P. copri successfully colonized mouse intestine already harboring Candida. These findings demonstrate a proof of concept that fungal members of gut microbiota can facilitate a colonization of the intestine by their bacterial counterparts, potentially mediated by a dietary metabolite.
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Affiliation(s)
- Siddhika Pareek
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,3Core Research for Evolutional Science and Technology, Japan Agency for Medical Research and Development, Tokyo, 100-0004 Japan
| | - Takashi Kurakawa
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan
| | - Bhabatosh Das
- 4Molecular Genetics Laboratory, Center for Human Microbial Ecology, Translational Health Science and Technology Institute, Faridabad, 121001 India
| | - Daisuke Motooka
- 5Department of Infection Metagenomics, Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871 Japan
| | - Shuuichi Nakaya
- 6Global Applications Development Center, Shimadzu Corp, Kyoto, 604-8511 Japan
| | | | - Nidhi Goyal
- 7Centre for Health Research and Development, Society for Applied Studies, New Delhi, 110016 India
| | - Hisako Kayama
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,3Core Research for Evolutional Science and Technology, Japan Agency for Medical Research and Development, Tokyo, 100-0004 Japan
| | - Dylan Dodd
- 8Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305 USA
| | - Ryu Okumura
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,3Core Research for Evolutional Science and Technology, Japan Agency for Medical Research and Development, Tokyo, 100-0004 Japan
| | - Yuichi Maeda
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,9Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, 565-0871 Japan
| | - Kosuke Fujimoto
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,9Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, 565-0871 Japan
| | - Takuro Nii
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,9Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, 565-0871 Japan
| | - Takao Ogawa
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,9Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, 565-0871 Japan
| | - Tetsuya Iida
- 5Department of Infection Metagenomics, Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871 Japan.,10Department of Bacterial Infections, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871 Japan
| | - Nita Bhandari
- 7Centre for Health Research and Development, Society for Applied Studies, New Delhi, 110016 India
| | - Toshiyuki Kida
- 11Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka, 565-0871 Japan
| | - Shota Nakamura
- 5Department of Infection Metagenomics, Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871 Japan
| | - G Balakrish Nair
- 4Molecular Genetics Laboratory, Center for Human Microbial Ecology, Translational Health Science and Technology Institute, Faridabad, 121001 India
| | - Kiyoshi Takeda
- 1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan.,2WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, 565-0871 Japan.,3Core Research for Evolutional Science and Technology, Japan Agency for Medical Research and Development, Tokyo, 100-0004 Japan
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9
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Pareek S, Nath A, Huang RS. MicroRNA targeting energy metabolism in ovarian cancer: a potent contender for future therapeutics. Ann Transl Med 2019; 7:S299. [PMID: 32016018 DOI: 10.21037/atm.2019.11.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Siddhika Pareek
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - Aritro Nath
- Department of Medical Oncology and Therapeutics Research, City of Hope, Monrovia, CA, USA
| | - R Stephanie Huang
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, USA
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10
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Modgil R, Arora KS, Sharma A, Mohapatra S, Pareek S. Cleidocranial Dysplasia: Presentation of Clinical and Radiological Features of a Rare Syndromic Entity. Mymensingh Med J 2018; 27:424-428. [PMID: 29769514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cleidocranial dysplasia is a developmental anomaly of the skeleton and the teeth. This condition may be inherited and be transmitted as dominant characteristics in either gender, or may appear spontaneously. It presents with skeletal defects of several bones, such as partial or complete absence of clavicles, late closure of the fontanels, presence of open skull sutures and multiple wormian bones. The dental manifestations are mainly delayed exfoliation of primary teeth and delayed eruption of permanent teeth with multiple impacted supernumerary teeth. This case of a 20 year old girl is noteworthy to the dentist as it deals with clinical and radiological features (a high number of impacted and supernumerary teeth as well as brachycephaly, frontal bossing and hypermobility of shoulders) which may come handy in clinical practice.
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Affiliation(s)
- R Modgil
- Dr Richa Modgil, Senior Lecturer, Department of Oral Medicine and Radiology, Eklavya Dental College & Hospital, Kotputli, Jaipur, Rajasthan, India
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Sharma P, Mathur N, Singh A, Sogani M, Bhatnagar P, Atri R, Pareek S. Monitoring hospital wastewaters for their probable genotoxicity and mutagenicity. Environ Monit Assess 2015; 187:4180. [PMID: 25487460 DOI: 10.1007/s10661-014-4180-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 11/19/2014] [Indexed: 05/22/2023]
Abstract
Cancer is a leading cause of death worldwide. Excluding the genetic factors, environmental factors, mainly the pollutants, have been implicated in the causation of the majority of cancers. Wastewater originated from health-care sectors such as hospitals may carry vast amounts of carcinogenic and genotoxic chemicals to surface waters or any other source of drinking water, if discharged untreated. Humans get exposed to such contaminants through a variety of ways including drinking water. The aim of the present study was, thus, to monitor the genotoxic and mutagenic potential of wastewaters from three big hospitals located in Jaipur (Rajasthan), India. One of them was operating an effluent treatment plant (ETP) for treatment of its wastewater and therefore both the untreated and treated effluents from this hospital were studied for their genotoxicity. Two short-term bacterial bioassays namely the Salmonella fluctuation assay and the SOS chromotest were used for the purpose. Results of fluctuation assay revealed the highly genotoxic nature of all untreated effluent samples with mutagenicity ratios (MR) up to 23.13 ± 0.18 and 42.25 ± 0.35 as measured with Salmonella typhimurium strains TA98 and TA100, respectively. As determined with the chromotest, all untreated effluents produced significant induction factors (IF) ranging from 3.29 ± 1.11 to 13.35 ± 3.58 at higher concentrations. In contrast, treated effluent samples were found to be slightly genotoxic in fluctuation test only with an MR = 3.75 ± 0.35 for TA100 at 10 % concentration. Overall, the results indicated that proper treatment of hospital wastewaters may render the effluents safe for disposal contrary to the untreated ones, possessing high genotoxic potential.
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Affiliation(s)
- Pratibha Sharma
- Environmental Molecular Microbiology Lab, Department of Zoology, University of Rajasthan, Jaipur, Rajasthan, 302004, India,
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12
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Pareek S, Roy S, Kumari B, Jain P, Banerjee A, Vrati S. MiR-155 induction in microglial cells suppresses Japanese encephalitis virus replication and negatively modulates innate immune responses. J Neuroinflammation 2014; 11:97. [PMID: 24885259 PMCID: PMC4050406 DOI: 10.1186/1742-2094-11-97] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 05/13/2014] [Indexed: 02/07/2023] Open
Abstract
Background Microglial cells, which are resident macrophages of the central nervous system, play important roles in immune responses and pathogenesis. Japanese encephalitis virus (JEV) is a neurotropic virus that infects microglial cells in brain. Several microRNAs including miR-155 and miR-146a play an important role in defining the microglia inflammatory profile. In this study, we have investigated the effect of miR-155 and miR-146a modulation on JEV infection as well as innate immune responses in human microglial cells. Methods In vitro studies were performed in JEV-infected human microglial CHME3 cells. miR-155 or miR-146a were overexpressed and total RNA and protein were extracted following JEV-infection. Expression of genes involved in innate immune responses was studied by PCR array, quantitative real-time PCR (qPCR), western blot and Fluorescence activated cell sorter (FACS). JEV replication was monitored by studying the viral RNA by qPCR, protein by western blot, and titres by plaque assay. Results Overexpression of miR-155 in CHME3 cells resulted in significantly reduced JEV replication whereas miR-146a overexpression had an insignificant effect. Additionally, interferon regulatory factor 8 (IRF8) and complement factor H (CFH) were induced during JEV infection; however, this induction was attenuated in miR-155 overexpressing cells following JEV infection. Further, JEV-induced NF-κB regulated downstream gene expression was attenuated. Interestingly, an increased level of CD45, a negative regulator of microglia activation and a reduced phosphorylated-Signal Transducers and Activators of Transcription (p-STAT1) expression was observed in miR-155 overexpressing cells upon JEV infection. Conclusion Induction of miR-155 in human microglial cells may negatively modulate JEV-induced innate immune gene expression and may have a beneficial role in limiting JEV replication in human microglial cells.
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Affiliation(s)
| | | | | | | | - Arup Banerjee
- Vaccine and Infectious Disease Research Center, Translational Health Science and Technology Institute, 496, Udyog Vihar Phase-III, Gurgaon 122016, India.
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Singh NK, Raichand R, Kaur I, Kaur C, Pareek S, Mayilraj S. Exiguobacterium himgiriensis sp. nov. a novel member of the genus Exiguobacterium, isolated from the Indian Himalayas. Antonie Van Leeuwenhoek 2012; 103:789-96. [PMID: 23229437 DOI: 10.1007/s10482-012-9861-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 11/26/2012] [Indexed: 10/27/2022]
Abstract
The taxonomic position of an orange coloured bacterium, strain K22-26(T) isolated from a soil sample was studied using a polyphasic approach. The organism had phenotypic and chemotaxonomic properties consistent with its allocation into the genus Exiguobacterium. Phylogenetic analysis of the 16S rRNA gene sequence showed that strain K22-26(T) belongs to the genus Exiguobacterium and was related to Exiguobacterium aurantiacum DSM 6208(T) (99.0 %) Exiguobacterium mexicanum DSM 16483(T) (98.6 %), Exiguobacterium aquaticum (98.6 %), Exiguobacterium aestuarii DSM 16306(T) (98.1 %), Exiguobacterium profundum DSM 17289(T) (98.1 %) and Exiguobacterium marinum DSM 16483(T) (97.9 %), whereas sequence similarity values with respect to other Exiguobacterium species with validly published names were between 92.5-94.0 %. The major polar lipids detected were phosphatidylglycerol, diphosphatidylglycerol and phosphatidylethanolamine. The major menaquinone was determined to be MK-7 (83 %) whereas MK-8 (11 %) and MK-6 (6 %) occur in smaller amounts. The peptidoglycan of the strain was found to contain L-lysine as the diagnostic diamino acid. The major fatty acids detected were iso C13:0 (11.2 %), anteiso C13:0 (15.4 %), iso C15:0 (13.2 %) and iso C17:0 (16.1 %). However, analysis of the DNA-DNA relatedness confirmed that strain K22-26(T) belongs to a novel species. The G + C content of the strain K22-26(T) was determined to be 50.1 mol %. The novel strain was distinguished from closely related type species of the genus Exiguobacterium using DNA-DNA relatedness and phenotypic data. Based on these differences, the strain K22-26(T) should be classified as a novel species of the genus Exiguobacterium, for which the name Exiguobacterium himgiriensis sp. nov. strain K22-26(T) (= MTCC 7628(T) = JCM 14260(T)) is proposed.
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Affiliation(s)
- Nitin Kumar Singh
- A Constituent Laboratory of Council of Scientific and Industrial Research (CSIR), Chandigarh, India
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Raichand R, Pareek S, Singh NK, Mayilraj S. Exiguobacterium aquaticum sp. nov., a member of the genus Exiguobacterium. Int J Syst Evol Microbiol 2011; 62:2150-2155. [PMID: 22058319 DOI: 10.1099/ijs.0.035790-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-positive, motile, short rod-shaped, orange pigmented bacterium, designated strain IMTB-3094(T), was isolated from a water sample collected from Tikkar Tal Lake, Haryana, and subjected to detailed polyphasic taxonomic analysis. Strain IMTB-3094(T) possessed most of the phenotypic and chemotaxonomic properties of the genus Exiguobacterium and, based on 16S rRNA gene sequence analysis, was assigned to this genus. Strain IMTB-3094(T) exhibited the highest 16S rRNA gene sequence similarity to Exiguobacterium mexicanum MTCC 7759(T) (99.5 %) followed by Exiguobacterium aurantiacum MTCC 6414(T) (99.1 %), Exiguobacterium aestuarii MTCC 7750(T) (98.0 %), Exiguobacterium profundum MTCC 10851(T) (98.0 %) and Exiguobacterium marinum MTCC 7751(T) (98.0 %). The G+C content of the genomic DNA of strain IMTB-3094(T) was 53.2 mol% and a DNA-DNA relatedness study confirmed that it represents a novel species. The major fatty acids of strain IMTB-3094(T) were iso-C(17 : 0) (16.1 %), anteiso-C(13 : 0) (19.0 %), iso-C(13 : 0) (11.9 %), iso-C(15 : 0) (9.8 %) and iso-C(17 : 1) (12.7 %). The predominant quinones were MK-7 (55.0 %) and MK-6 (26.0 %) with minor amounts of MK-8 (12.0 %). Based on phenotypic, chemotaxonomic and phylogenetic analyses, strain IMTB-3094(T) represents a novel species of the genus Exiguobacterium, for which the name Exiguobacterium aquaticum sp. nov. is proposed. The type strain is IMTB-3094(T) (= MTCC 10958(T) = JCM 17977(T)).
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Affiliation(s)
- Revti Raichand
- Microbial Type Culture Collection & Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Chandigarh 160036, India
| | - Siddhika Pareek
- Microbial Type Culture Collection & Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Chandigarh 160036, India
| | - Nitin Kumar Singh
- Microbial Type Culture Collection & Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Chandigarh 160036, India
| | - Shanmugam Mayilraj
- Microbial Type Culture Collection & Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Chandigarh 160036, India
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Manickam N, Pareek S, Kaur I, Singh NK, Mayilraj S. Nitratireductor lucknowense sp. nov., a novel bacterium isolated from a pesticide contaminated soil. Antonie van Leeuwenhoek 2011; 101:125-31. [DOI: 10.1007/s10482-011-9623-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 07/06/2011] [Indexed: 11/29/2022]
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Gupta S, Pareek S, Dulara SC. Comparison of two methods for predicting difficult intubation in obstetric patients. Middle East J Anaesthesiol 2003; 17:275-85. [PMID: 14503127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Preoperative airway assessment for prediction of difficult laryngoscopy and intubation was done using the modified Mallampati test and Wilson risk sum score in three hundred and seventy two obstetric patients undergoing elective as well as emergency Cesarean section under general anesthesia. 25 (6.7%) patients had laryngoscopy grade III or IV of whom 24 (6.4%) patients were difficult at tracheal intubation. Mallampati class III or IV predicted 15 of the 23 patients while Wilson risk sum score > or = 2 predicted 9 of the 14 patients in whom tracheal intubation was difficult. As a screening test for prediction of difficult intubation Wilson risk sum score was less sensitive (36%) but had almost same specificity (98.5%) and positive predictive value (64%) in comparison to modified Mallampati test (62.5%, 97.7% and 65% respectively). When used as a predictor of difficult laryngoscopy sensitivity, specificity and positive predictive value for modified Mallampati test were 60%, 97.6% and 65% respectively and for Wilson risk sum they were 36%, 98.5% and 64% respectively, but when both tests were combined as predictors (with either of tests positive) sensitivity improved to 100% while specificity was marginally decreased to 96.2% and positive predictive value (64.8%) remained almost the same. There was no significant association between age and laryngoscopy grade III or IV but there was significant (P < 0.01) relationship with weight and external laryngeal manipulation. The advantage of the above tests lies in, incorporating them into the preoperative protocol, rather than using them as sole predictors of difficult laryngoscopy and intubation.
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Affiliation(s)
- S Gupta
- Department of Anaesthesiology and Resuscitation RNT Medical College, Udaipur-313001.
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Abstract
The initial decomposition rates of cellulose and hemicellulose were measured using toluene to specifically inhibit the microbial uptake of hydrolysis products during the degradation of newspaper under sulfate reducing and methane producing conditions. The amount of glucose and xylose accumulation in the first 2 weeks of incubation period was higher in the sulfate reducing condition compared to the methane producing condition. It was estimated that 28 and 6% of initially loaded cellulose in the sulfate reducing condition and the methane producing condition was hydrolyzed, respectively. Accordingly, the newspaper-cellulose hydrolysis rate constant was estimated to be 6.7 times higher in sulfate reducing condition than in methane producing condition. Based on the glucose accumulation patterns, when sulfate reducing bacteria (SRB) were inhibited by anthraquinone and molybdate (Na2MoO4), it may be suggested that SRB might have contributed to the hydrolysis of cellulose, while their effect on the hydrolysis of hemicellulose could not be elucidated.
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Affiliation(s)
- S Pareek
- Research Center for Environmental Quality Control, Kyoto University, Otsu, Shiga, Japan.
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Mowla SJ, Farhadi HF, Pareek S, Atwal JK, Morris SJ, Seidah NG, Murphy RA. Biosynthesis and post-translational processing of the precursor to brain-derived neurotrophic factor. J Biol Chem 2001; 276:12660-6. [PMID: 11152678 DOI: 10.1074/jbc.m008104200] [Citation(s) in RCA: 402] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We examined the biosynthesis and post-translational processing of the brain-derived neurotrophic factor precursor (pro-BDNF) in cells infected with a pro-BDNF-encoding vaccinia virus. Metabolic labeling, immunoprecipitation, and SDS-polyacrylamide gel electrophoresis reveal that pro-BDNF is generated as a 32-kDa precursor that is N-glycosylated and glycosulfated on a site, within the pro-domain. Some pro-BDNF is released extracellularly and is biologically active as demonstrated by its ability to mediate TrkB phosphorylation. The precursor undergoes N-terminal cleavage within the trans-Golgi network and/or immature secretory vesicles to generate mature BDNF (14 kDa). Small amounts of a 28-kDa protein that is immunoprecipitated with BDNF antibodies is also evident. This protein is generated in the endoplasmic reticulum through N-terminal cleavage of pro-BDNF at the Arg-Gly-Leu-Thr(57)- downward arrow-Ser-Leu site. Cleavage is abolished when Arg(54) is changed to Ala (R54A) by in vitro mutagenesis. Blocking generation of 28-kDa BDNF has no effect on the level of mature BDNF and blocking generation of mature BDNF with alpha(1)-PDX, an inhibitor of furin-like enzymes, does not lead to accumulation of the 28-kDa form. These data suggest that 28-kDa pro-BDNF is not an obligatory intermediate in the formation of the 14-kDa form in the constitutive secretory pathway.
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Affiliation(s)
- S J Mowla
- Salk Institute, La Jolla, California 92037-1099, USA
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Pareek S, Azuma JI, Matsui S, Shimizu Y. Degradation of lignin and lignin model compound under sulfate reducing condition. Water Sci Technol 2001; 44:351-358. [PMID: 11548005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The release of depolymerization products of lignin during the degradation of lignocellulsic material under sulfate reducing condition was investigated. In addition, we investigated the fate of the most common (beta-O-4) link present in lignin under sulfate reducing condition, using a lignin model compound. The method of investigation was based on the selective inhibition of microbial uptake of released aromatic phenolic compounds, depolymerization product of lignin, by toluene. Eight different aromatic phenolic compounds were identified. Until day 17 only 3 phenolic compounds were regularly detected, thereafter 7 aromatic phenolic compounds could be regularly identified. The accumulation of identified phenolic acid was not linear with time. The lignin model compound was completely degraded within 13 days when either Avicel cellulose or newspaper was present as alternate source of carbon. On the other hand when lignin model compound was present as the sole source of carbon, it took more than 22 days for its complete degradation. But in either case complete degradation of lignin model compound was observed. Four degradation byproducts of lignin model compound were identified, but the two most significant compounds identified were vanillic acid and 3-methoxy-4-hydroxy benzene propionic acid. The GC/MS analysis of the degradation by products of lignin model compound indicated that beta-O-4 link was cleaved under sulfate reducing condition and the presence of additional carbon source enhanced this process.
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Affiliation(s)
- S Pareek
- Research Centre for Environmental Quality Control, Kyoto University, Otsu City, Shiga, Japan
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20
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Mowla SJ, Pareek S, Farhadi HF, Petrecca K, Fawcett JP, Seidah NG, Morris SJ, Sossin WS, Murphy RA. Differential sorting of nerve growth factor and brain-derived neurotrophic factor in hippocampal neurons. J Neurosci 1999; 19:2069-80. [PMID: 10066260 PMCID: PMC6782557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
Nerve growth factor (NGF) is released through the constitutive secretory pathway from cells in peripheral tissues and nerves where it can act as a target-derived survival factor. In contrast, brain-derived neurotrophic factor (BDNF) appears to be processed in the regulated secretory pathway of brain neurons and secreted in an activity-dependent manner to play a role in synaptic plasticity. To determine whether sorting differences are intrinsic to the neurotrophins or reflect differences between cell types, we compared NGF and BDNF processing in cultured hippocampal neurons using a Vaccinia virus expression system. Three independent criteria (retention or release from cells after pulse-chase labeling, depolarization-dependent release, and immunocytochemical localization) suggest that the bulk of newly synthesized NGF is sorted into the constitutive pathway, whereas BDNF is primarily sorted into the regulated secretory pathway. Similar results occurred with AtT 20 cells, including those transfected with cDNAs encoding neurotrophin precursor-green fluorescent protein fusions. The NGF precursor, but not the BDNF precursor, is efficiently cleaved by the endoprotease furin in the trans-Golgi network (TGN). Blocking furin activity in AtT 20 cells with alpha1-PDX as well as increasing the expression of NGF precursor partially directed NGF into the regulated secretory pathway. Therefore, neurotrophins can be sorted into either the constitutive or regulated secretory pathways, and sorting may be regulated by the efficiency of furin cleavage in the TGN. This mechanism may explain how neuron-generated neurotrophins can act both as survival factors and as neuropeptides.
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Affiliation(s)
- S J Mowla
- Centre for Neuronal Survival, McGill University, Montreal, Quebec, Canada H3A 2B4
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21
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Pareek S, Notterpek L, Snipes GJ, Naef R, Sossin W, Laliberté J, Iacampo S, Suter U, Shooter EM, Murphy RA. Neurons promote the translocation of peripheral myelin protein 22 into myelin. J Neurosci 1997; 17:7754-62. [PMID: 9315897 PMCID: PMC6793898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Schwann cells express low levels of myelin proteins in the absence of neurons. When Schwann cells and neurons are cultured together the production of myelin proteins is elevated, and myelin is formed. For peripheral myelin protein 22 (PMP22), the exact amount of protein produced is critical, because peripheral neuropathies result from its underexpression or overexpression. In this study we examined the effect of neurons on Schwann cell PMP22 production in culture and in peripheral nerve using metabolic labeling and pulse-chase studies as well as immunocytochemistry. Most of the newly synthesized PMP22 in Schwann cells is rapidly degraded in the endoplasmic reticulum. Only a small proportion of the total PMP22 acquires complex glycosylation and accumulates in the Golgi compartment. This material is translocated to the Schwann cell membrane in detectable amounts only when axonal contact and myelination occur. Myelination does not, however, alter the rapid turnover of PMP22 in Schwann cells. PMP22 may therefore be a unique myelin protein in that axonal contact promotes its insertion into the Schwann cell membrane and myelin without altering its rapid turnover rate within the cell.
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Affiliation(s)
- S Pareek
- Montreal Neurological Institute and the Faculty of Medicine, McGill University, Montreal, Quebec H3A 2B4, Canada
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Farhadi H, Pareek S, Day R, Dong W, Chrétien M, Bergeron JJ, Seidah NG, Murphy RA. Prohormone convertases in mouse submandibular gland: co-localization of furin and nerve growth factor. J Histochem Cytochem 1997; 45:795-804. [PMID: 9199665 DOI: 10.1177/002215549704500604] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Nerve growth factor (NGF) in mouse submandibular glands (SGs) is generated from a 35-kD precursor by proteolytic enzymes that have yet to be identified. Prohormone convertases (PCs) cleave the NGF precursor in vitro, and in this study we questioned whether PCs could process salivary NGF in vivo. mRNA coding for PC2 (but not PC1) was detected on Northern blots of SG mRNA and also by in situ hybridization within parasympathetic neurons of intralobular ganglia. Northern blot and in situ hybridization analyses also detect mRNA coding for furin. In SGs of male mice, furin mRNA levels are high at birth and remain high throughout development. In glands from female mice, levels decline during postnatal development and are lower in adults than in newborns. Immunocytochemistry detects furin immunoreactivity in pro-acinar and ductal cells of glands from newborn and pubescent mice. In glands of adults, furin immunoreactivity is detectable in acinar cells but highest levels are present in NGF-containing granular convoluted tubule cells. These data, taken together with those from previous studies, suggest that furin is a candidate processing enzyme for NGF in mouse submandibular glands.
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Affiliation(s)
- H Farhadi
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
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Fawcett JP, Aloyz R, McLean JH, Pareek S, Miller FD, McPherson PS, Murphy RA. Detection of brain-derived neurotrophic factor in a vesicular fraction of brain synaptosomes. J Biol Chem 1997; 272:8837-40. [PMID: 9082996 DOI: 10.1074/jbc.272.14.8837] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The mRNA encoding brain-derived neurotrophic factor (BDNF) is widely distributed in central nervous system neurons, including in hippocampus and cortex. However, little is known about the physiology of BDNF protein within neurons, including how it is processed or packaged and the mechanisms that control its release. In this study, we have used antibodies to monitor the subcellular distribution of BDNF in cortical extracts from adult rats treated with kainic acid. BDNF immunoreactivity is elevated in rat cortex 12 h after kainic acid treatment. The protein is enriched in a vesicular fraction isolated from lysed synaptosomes, its distribution being similar to that of synaptotagmin, which is associated with synaptic vesicles and large dense core vesicles at nerve terminals. The vesicular pool of BDNF is digested by proteinase K only in the presence of Triton X-100 suggesting localization of BDNF in membrane fractions. Immunocytochemistry detects diffuse and punctate BDNF staining within cell bodies and processes of cortical neurons from kainic acid-treated rats, as well as in mossy fiber terminals of rat hippocampus. Taken together, these data show that BDNF can accumulate axonally within a vesicular compartment of brain neurons. Results support the idea that endogenous BDNF may be transported anterogradely and released by regulated secretory mechanisms.
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Affiliation(s)
- J P Fawcett
- Centre for Neuronal Survival, Montreal Neurological Institute, McGill University, Montreal, Quebec H3A 2B4, Canada
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Seidah NG, Benjannet S, Pareek S, Savaria D, Hamelin J, Goulet B, Laliberte J, Lazure C, Chrétien M, Murphy RA. Cellular processing of the nerve growth factor precursor by the mammalian pro-protein convertases. Biochem J 1996; 314 ( Pt 3):951-60. [PMID: 8615794 PMCID: PMC1217149 DOI: 10.1042/bj3140951] [Citation(s) in RCA: 220] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In order to define the enzymes responsible for the maturation of the precursor of nerve growth factor (proNGF), its biosynthesis and intracellular processing by the pro-protein convertases furin, PC1, PC2, PACE4, PC5 and the PC5 isoform PC5/6-B were analysed using the vaccinia virus expression system in cells containing a regulated and/or a constitutive secretory pathway. Results demonstrate that in both cell types furin, and to a lesser extent PACE4 and PC5/6-B, are the best candidate proNGF convertases. Furthermore, two processed NGF forms of 16.5 and 13.5 kDa were evident in constitutively secreting cell lines such as LoVo and BSC40 cells, whereas only the 13.5 kDa form was observed in AtT20 cells, which contain secretory granules. Both forms display the same N-terminal sequence as mature NGF, and were also produced following site-directed mutagenesis of the C-terminal Arg-Arg sequence of NGF into Ala-Ala, suggesting that the difference between them is not at the C-terminus. Co-expression of proNGF with furin and either chromogranin B or secretogranin II (but not chromogranin A) in BSC40 cells eliminated the 16.5 kDa form. Data also show that N-glycosylation of the pro-segment of proNGF and trimming of the oligosaccharide chains are necessary for the exit of this precursor from the endoplasmic reticulum and its eventual processing and secretion. Sulphate labelling experiments demonstrated that proNGF is processed into mature NGF following the arrival of the precursor in the trans-Golgi network. This comparative study shows that the three candidate mammalian subtilisin/kexin-like convertases identified process proNGF into NGF and that the nature of the final processed products is dependent on the intracellular environment.
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Affiliation(s)
- N G Seidah
- J. A. DeSève Laboratories of Biochemical and Molecular Neuroendocrinology, Clinical Research Institute of Montreal, University of Montreal, Canada
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Seidah NG, Benjannet S, Pareek S, Chrétien M, Murphy RA. Cellular processing of the neurotrophin precursors of NT3 and BDNF by the mammalian proprotein convertases. FEBS Lett 1996; 379:247-50. [PMID: 8603699 DOI: 10.1016/0014-5793(95)01520-5] [Citation(s) in RCA: 260] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In order to define the enzymes responsible for the maturation of the precursors of brain-derived neurotrophic factor (proBDNF) and neurotrophin-3 (proNT3), we have analysed their biosynthesis and intracellular processing by the proprotein convertases furin, PC1, PC2, PACE4, PC5 and its isoform PC5/6-B. In these studies, we utilized a vaccinia virus expression system in either BSC40 or the furin activity-deficient LoVo cells. Results demonstrated that in both cells furin and, to a lesser extent, PACE4 and PC5/6-B effectively process proBDNF and proNT3. Furthermore, we have determined that human proNT3 is sulfated, suggesting that processing of proNT3 occurs following the arrival of the precursor to the Trans Golgi Network.
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Affiliation(s)
- N G Seidah
- J.A. DeSève Laboratories of Biochemical Neuroendocrinology, Clincial Research Institute of Montreal, University of Montreal, Canada
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Suter U, Snipes GJ, Schoener-Scott R, Welcher AA, Pareek S, Lupski JR, Murphy RA, Shooter EM, Patel PI. Regulation of tissue-specific expression of alternative peripheral myelin protein-22 (PMP22) gene transcripts by two promoters. J Biol Chem 1994; 269:25795-808. [PMID: 7929285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Mutations affecting the peripheral myelin protein-22 (PMP22) gene have been shown to be associated with inherited peripheral neuropathies. To provide the molecular basis for the analysis of such mutations, we have cloned and characterized the human PMP22 gene. It spans approximately 40 kilobases and contains four coding exons. Detailed analysis of its 5'-flanking region suggested the presence of two alternatively transcribed, but untranslated exons. Mapping of separate PMP22 mRNA transcription initiation sites to each of these exons indicates that PMP22 expression is regulated by two alternatively used promoters. In support of this hypothesis, both putative promoter sequences demonstrated the ability to drive expression of reporter genes in transfection experiments. Furthermore, the structures of the 5'-portions of the PMP22 genes appear to be identical in rat and human, supporting the biological significance of the observed arrangement of regulatory regions. The relative expression of the alternative PMP22 transcripts is tissue-specific, and high levels of the exon 1A-containing transcript are tightly coupled to myelin formation. In contrast, exon 1B-containing transcripts are predominant in non-neural tissues and in growth-arrested primary fibroblasts. Interestingly, although a strong upregulation of PMP22 mRNA was observed in cultured Schwann cells in the presence of the adenylate cyclase activator forskolin under various culture conditions, the regulation of the different PMP22 mRNA species did not mimic the regulation that occurs during myelin formation in vivo. The observed regulation of the PMP22 gene by a complex molecular mechanism is consistent with the proposed dual role of PMP22 in neural and non-neural tissue.
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Affiliation(s)
- U Suter
- Department of Cell Biology, Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich
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Pareek S, Suter U, Snipes GJ, Welcher AA, Shooter EM, Murphy RA. Detection and processing of peripheral myelin protein PMP22 in cultured Schwann cells. J Biol Chem 1993; 268:10372-9. [PMID: 8486695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Peripheral myelin protein, 22 kDa (PMP22), is a myelin molecule associated with Schwann cells in peripheral nerves (Snipes, G. J., Suter, U., Welcher, A. A., and Shooter, E. M. (1992) J. Cell Biol. 117, 225-238). Mutations affecting the PMP22 gene have been implicated in the trembler mutation in mice (Suter, U., Welcher, A. A., Ozcelik, T., Snipes, G. J., Kosaras, B., Francke, U., Billings-Gagliardi, S., Sidman, R. L., and Shooter, E. M. (1992) Nature 356, 241-244; Suter, U., Moskow, J. J., Welcher, A. A., Snipes, G. J., Kosaras, B., Sidman, R. L., Buchberg, A. M., and Shooter, E. M. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 4382-4386) and Charcot-Marie-Tooth Disease in humans (Patel, P. I., Roa, B. B., Welcher, A. A., Schoener-Scott, R., Trask, B. J., Pentao, L., Snipes, G. J., Garcia, C. A., Francke, U., Shooter, E. M., Lupski, J. R., and Suter, U. (1992) Nature genet. 1, 159-165). In this report, we have studied PMP22 production in cultured rat Schwann cells. Schwann cells contain a 1.8-kilobase mRNA transcript coding for PMP22, and its production is up-regulated in vitro by forskolin. Metabolic labeling combined with immunoprecipitation methods using antibodies raised against synthetic peptides of PMP22 reveal that Schwann cells generate the protein from an 18-kDa precursor form which is post-translationally modified by N-linked glycosylation. A second molecule (molecular mass, 48 kDa) that reacted with PMP22 antibodies was also detected in Schwann cells but is not related chemically to PMP22 as determined by pulse-chase labeling. Metabolic labeling of rat sciatic nerve and Western blot analyses of purified rat sciatic nerve myelin reveal that deglycosylation of PMP22 gives rise to an 18-kDa protein similar in size to that in Schwann cells. These results indicate that cultured Schwann cells may provide a good model in which to investigate the production and function of PMP22 and to establish the cellular basis for the protein's involvement in inherited peripheral neuropathies.
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Affiliation(s)
- S Pareek
- Montreal Neurological Institute, McGill University, Quebec, Canada
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Pareek S, Suter U, Snipes G, Welcher A, Shooter E, Murphy R. Detection and processing of peripheral myelin protein PMP22 in cultured Schwann cells. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(18)82211-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Toma JG, Pareek S, Barker P, Mathew TC, Murphy RA, Acheson A, Miller FD. Spatiotemporal increases in epidermal growth factor receptors following peripheral nerve injury. J Neurosci 1992; 12:2504-15. [PMID: 1377231 PMCID: PMC6575829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Non-neuronal cells of peripheral nerve respond to axonal injury with a series of cellular changes that facilitate neuronal regeneration. To characterize the potential role of the epidermal growth factor (EGF) family of proteins in this response, we monitored the expression of EGF receptor mRNA and protein in the injured rat sciatic nerve. EGF receptor mRNA is synthesized in both primary cultured fibroblasts and Schwann cells, and Schwann cells express EGF receptor-like immunoreactivity. In situ hybridization and immunocytochemistry revealed that EGF receptor mRNA and protein are expressed in Schwann cells and fibroblasts of the sciatic nerve in vivo, and that receptor levels increase following nerve injury. Thirty-six hours postlesion, EGF receptors were expressed in gradients along the nerve both proximal and distal to the lesion, with the highest levels localized adjacent to the transection site. By 72 hr, receptor levels were maintained in a gradient in the proximal segment, but were uniformly increased throughout the portions of the distal segment that were analyzed. These changes were similar to those observed for low-affinity NGF receptor mRNA and protein, with transection causing increased expression in both Schwann cells and fibroblasts. Northern blots confirmed that primary cultured fibroblasts express low-affinity NGF receptor mRNA. To determine whether spatiotemporal gradients were a general characteristic of the nerve injury response, we monitored expression of the mRNA encoding the major myelin protein P0. Levels of P0 mRNA decreased initially in cells immediately adjacent to the transection site and, by 72 hr, were uniformly decreased throughout the distal segment. These data suggest that members of the EGF family of proteins may play a role in the peripheral nerve response to injury, and demonstrate a generalized gradient of cellular responses that commence at the transection site and progress distally in the nerve in the absence of intact axons.
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Affiliation(s)
- J G Toma
- Department of Anatomy and Cell Biology, University of Alberta, Edmonton, Canada
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Pareek S, Jain N, Bhatia AL. Tritium toxicity in postnatally developing mouse brain: neurochemical changes after continuous exposure. Int J Rad Appl Instrum B 1989; 16:347-50. [PMID: 2777573 DOI: 10.1016/0883-2897(89)90097-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Since tritium may emerge as a major radiopollutant, an attempt has been made to evaluate changes in total cholesterol, phospholipid and glycogen content in the postnatally developing mouse brain from 1 to 6 weeks of age; the exposure, at a dose level of 11.1 kBq (0.3 microCi)/mL of 3H, through maternal drinking water, was from gestation day 15 until the last interval studied (after a maternal priming injection). The brain-to-body weight ratio was increased during postnatal development as compared to that of sham-irradiated controls. The phospholipid concentration decreased significantly in all age groups. By contrast, glycogen content tended to increase from 1 to 5 weeks of age, and cholesterol content increased by 40.35 and 44.75% during the 2nd and 3rd weeks, respectively, and returned to a near normal level at later intervals.
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Affiliation(s)
- S Pareek
- Department of Zoology, University of Rajasthan, Jaipur, India
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Pareek S. Treatment of condyloma acuminatum with 5% 5-fluorouracil. Br J Vener Dis 1979; 55:65-6. [PMID: 427519 PMCID: PMC1045586 DOI: 10.1136/sti.55.1.65-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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