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Wilby AJ, Cabral S, Zoghi N, Howell SJ, Farnie G, Harrison H. A novel preclinical model of the normal human breast. J Mammary Gland Biol Neoplasia 2024; 29:9. [PMID: 38695983 PMCID: PMC11065935 DOI: 10.1007/s10911-024-09562-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 04/01/2024] [Indexed: 05/05/2024] Open
Abstract
Improved screening and treatment have decreased breast cancer mortality, although incidence continues to rise. Women at increased risk of breast cancer can be offered risk reducing treatments, such as tamoxifen, but this has not been shown to reduce breast cancer mortality. New, more efficacious, risk-reducing agents are needed. The identification of novel candidates for prevention is hampered by a lack of good preclinical models. Current patient derived in vitro and in vivo models cannot fully recapitulate the complexities of the human tissue, lacking human extracellular matrix, stroma, and immune cells, all of which are known to influence therapy response. Here we describe a normal breast explant model utilising a tuneable hydrogel which maintains epithelial proliferation, hormone receptor expression, and residency of T cells and macrophages over 7 days. Unlike other organotypic tissue cultures which are often limited by hyper-proliferation, loss of hormone signalling, and short treatment windows (< 48h), our model shows that tissue remains viable over 7 days with none of these early changes. This offers a powerful and unique opportunity to model the normal breast and study changes in response to various risk factors, such as breast density and hormone exposure. Further validation of the model, using samples from patients undergoing preventive therapies, will hopefully confirm this to be a valuable tool, allowing us to test novel agents for breast cancer risk reduction preclinically.
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Affiliation(s)
- Anthony J Wilby
- Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Oglesby Cancer Research Building, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
- Manchester Breast Centre, University of Manchester, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
| | - Sara Cabral
- Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Oglesby Cancer Research Building, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
- Manchester Breast Centre, University of Manchester, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
- Henry Royce Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Nastaran Zoghi
- Department of Materials & Institute of Biotechnology, University of Manchester, Manchester, M1 7DN, United Kingdom
| | - Sacha J Howell
- Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Oglesby Cancer Research Building, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
- Manchester Breast Centre, University of Manchester, Wilmslow Road, Manchester, M20 4GJ, United Kingdom
- NIHR Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Central Manchester University Hospitals NHS Foundation Trust, 29 Grafton St, Manchester, M13 9WU, United Kingdom
- The Nightingale and Prevent Breast Cancer Centre, Manchester University NHS Foundation Trust, Manchester, M23 9LT, United Kingdom
| | - Gillian Farnie
- Cancer Research Horizons, The Francis Crick Institute, 1 Midland Road, Manchester, NW1 1AT, United Kingdom
| | - Hannah Harrison
- Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Oglesby Cancer Research Building, Wilmslow Road, Manchester, M20 4GJ, United Kingdom.
- Manchester Breast Centre, University of Manchester, Wilmslow Road, Manchester, M20 4GJ, United Kingdom.
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Bennur PL, O'Brien M, Fernando SC, Doblin MS. Improving transformation and regeneration efficiency in medicinal plants: Insights from other recalcitrant species. J Exp Bot 2024:erae189. [PMID: 38652155 DOI: 10.1093/jxb/erae189] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Indexed: 04/25/2024]
Abstract
Medicinal plants are integral to traditional medicine systems world-wide, being pivotal for human health. Harvesting plant material from natural environments, however, has led to species scarcity, prompting action to develop cultivation solutions that also aid conservation efforts. Biotechnological tools, specifically plant tissue culture and genetic transformation, offer solutions for sustainable, large-scale production and enhanced yield of valuable biomolecules. While these techniques are instrumental to the development of the medicinal plant industry, the challenge of inherent regeneration recalcitrance in some species to in vitro cultivation hampers these efforts. This review examines the strategies for overcoming recalcitrance in medicinal plants using a holistic approach, emphasising the meticulous choice of explants, e.g. embryonic/meristematic tissues; plant growth regulators, e.g. synthetic cytokinins; and use of novel regeneration-enabling methods to deliver morphogenic genes e.g. GRF/GIF chimeras and nanoparticles, which have been shown to contribute to overcoming recalcitrance barriers in agriculture crops. Furthermore, it highlights the benefit of cost-effective genomic technologies that enable precise genome editing and the value of integrating data-driven models to address genotype-specific challenges in medicinal plant research. These advances mark a progressive step towards a future where medicinal plant cultivation is not only more efficient and predictable but also inherently sustainable, ensuring the continued availability and exploitation of these important plants for current and future generations.
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Affiliation(s)
- Praveen Lakshman Bennur
- Australian Research Council (ARC) Industrial Transformation Research Hub for Medicinal Agriculture, La Trobe Institute for Sustainable Agriculture and Food (LISAF), Department of Animal, Plant and Soil Sciences, La Trobe University, Victoria 3086, Australia
| | - Martin O'Brien
- Australian Research Council (ARC) Industrial Transformation Research Hub for Medicinal Agriculture, La Trobe Institute for Sustainable Agriculture and Food (LISAF), Department of Animal, Plant and Soil Sciences, La Trobe University, Victoria 3086, Australia
| | - Shyama C Fernando
- Australian Research Council (ARC) Industrial Transformation Research Hub for Medicinal Agriculture, La Trobe Institute for Sustainable Agriculture and Food (LISAF), Department of Animal, Plant and Soil Sciences, La Trobe University, Victoria 3086, Australia
| | - Monika S Doblin
- Australian Research Council (ARC) Industrial Transformation Research Hub for Medicinal Agriculture, La Trobe Institute for Sustainable Agriculture and Food (LISAF), Department of Animal, Plant and Soil Sciences, La Trobe University, Victoria 3086, Australia
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Hewitson TD, Smith ER. Propagation, Culture, and Characterization of Renal Fibroblasts. Methods Mol Biol 2023; 2664:13-29. [PMID: 37423979 DOI: 10.1007/978-1-0716-3179-9_2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The renal fibroblast, and phenotypically related myofibroblast, are universally present in all forms of progressive kidney disease. The in vitro study of the fibroblast, its behaviour, and factors affecting its activity is therefore key to understanding both its role and significance. In this protocol, we describe a reproducible method for selective propagation and culture of primary renal fibroblasts from kidney cortex. Techniques for their isolation, subculture, characterization, and cryogenic storage and retrieval are described in detail.
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Affiliation(s)
- Tim D Hewitson
- Department of Nephrology, The Royal Melbourne Hospital, Parkville, Melbourne, VIC, Australia.
- Department of Medicine, University of Melbourne, Parkville, Melbourne, VIC, Australia.
| | - Edward R Smith
- Department of Nephrology, The Royal Melbourne Hospital, Parkville, Melbourne, VIC, Australia
- Department of Medicine, University of Melbourne, Parkville, Melbourne, VIC, Australia
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Abstract
Organotypic retinal explants are routinely used as alternatives to in vitro cell culture and to replace the use of animals in modelling retinal neurodegenerative diseases. Retinal explants fill the gap between in vivo which are expensive, time consuming, and complex due to inaccessibility of target tissues. However, organotypic retinal explants are less expensive and rapid and retinal cell types in the explant maintain their morphologic interactions with other cells in the retina. Therefore, retinal explants have high potential to be used as tools to assess the pharmacological and other therapies prior to in vivo validation, reducing the use of live animals.
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Affiliation(s)
- Zubair Ahmed
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK.
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5
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Hsu M, Ju JY, Pearson MM, Yu L, Swanson PE, Yeh MM. IgG and IgM Immunohistochemistry in Primary Biliary Cholangitis (PBC) and Autoimmune Hepatitis (AIH) Liver Explants. Am J Clin Pathol 2022; 158:770-773. [PMID: 36048887 DOI: 10.1093/ajcp/aqac101] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/22/2022] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Primary biliary cholangitis (PBC) and autoimmune hepatitis (AIH) can be difficult to distinguish in end-stage liver disease. Previous studies have shown that immunoglobulin G (IgG) and immunoglobulin M (IgM) immunostaining can differentiate AIH from PBC in needle core biopsy specimens, and we seek to extend these data to cirrhotic liver explants, in which the histology of AIH or PBC may be indiscernible. METHODS Clinical data were reviewed for 20 patients with PBC cirrhosis and 16 with AIH cirrhosis. Immunohistochemistry for IgM and IgG was performed on representative blocks of explanted livers. Three high-power fields with the highest concentration of IgG- and IgM-positive plasma cells were counted and compared. RESULTS The average number of IgM-positive plasma cells was significantly higher in PBC explants (7.3) than in AIH (1.8) (P = .001). There was no significant difference in the average number of IgG-positive plasma cells in PBC (2.5) and AIH (2.8) (P = .8). The IgG/IgM ratio was more likely to be less than 1.0 in PBC (17/20, 85%) compared with AIH (7/16, 44%) (P = .01). CONCLUSIONS Our study demonstrates that the absolute number of IgM plasma cells is greater in explants of cirrhotic PBC compared with AIH. These findings may be helpful in the evaluation of cryptogenic cirrhosis.
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Affiliation(s)
- Maylee Hsu
- Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, WA, USA.,Department of Pathology, Veterans Affairs Medical Center, Portland, OR, USA
| | - Jennifer Y Ju
- Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, WA, USA
| | - Meredith M Pearson
- Department of Medicine, University of Washington Medical Center, Seattle, WA, USA
| | - Lei Yu
- Department of Medicine, University of Washington Medical Center, Seattle, WA, USA
| | - Paul E Swanson
- Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, WA, USA.,Department of Medicine, University of Washington Medical Center, Seattle, WA, USA
| | - Matthew M Yeh
- Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, WA, USA.,Department of Medicine, University of Washington Medical Center, Seattle, WA, USA
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Shin SY, Park SJ, Kim HS, Jeon JH, Lee HJ. Wound-induced signals regulate root organogenesis in Arabidopsis explants. BMC Plant Biol 2022; 22:133. [PMID: 35317749 PMCID: PMC8939181 DOI: 10.1186/s12870-022-03524-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/09/2022] [Indexed: 05/23/2023]
Abstract
BACKGROUND Reactive oxygen species (ROS) and calcium ions (Ca2+) are representative signals of plant wound responses. Wounding triggers cell fate transition in detached plant tissues and induces de novo root organogenesis. While the hormonal regulation of root organogenesis has been widely studied, the role of early wound signals including ROS and Ca2+ remains largely unknown. RESULTS We identified that ROS and Ca2+ are required for de novo root organogenesis, but have different functions in Arabidopsis explants. The inhibition of the ROS and Ca2+ signals delayed root development in detached leaves. Examination of the auxin signaling pathways indicated that ROS and Ca2+ did not affect auxin biosynthesis and transport in explants. Additionally, the expression of key genes related to auxin signals during root organogenesis was not significantly affected by the inhibition of ROS and Ca2+ signals. The addition of auxin partially restored the suppression of root development by the ROS inhibitor; however, auxin supplementation did not affect root organogenesis in Ca2+-depleted explants. CONCLUSIONS Our results indicate that, while both ROS and Ca2+ are key molecules, at least in part of the auxin signals acts downstream of ROS signaling, and Ca2+ acts downstream of auxin during de novo root organogenesis in leaf explants.
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Affiliation(s)
- Seung Yong Shin
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
- Department of Functional Genomics, KRIBB School of Bioscience, University of Science and Technology, Daejeon, 34113, Korea
| | - Su-Jin Park
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology, Daejeon, 34113, Korea
| | - Hyun-Soon Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology, Daejeon, 34113, Korea
| | - Jae-Heung Jeon
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Hyo-Jun Lee
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea.
- Department of Functional Genomics, KRIBB School of Bioscience, University of Science and Technology, Daejeon, 34113, Korea.
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Domenici G, Trindade G, Estrada MF, Cartaxo AL, Alves PM, André S, Brito C. Patient-Derived Breast Cancer Tissue Cultures for Anti-Endocrine Drug Assays. Methods Mol Biol 2022; 2535:11-31. [PMID: 35867219 DOI: 10.1007/978-1-0716-2513-2_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Breast cancer is a complex and heterogeneous pathology, characterized by a variety of histological and molecular phenotypes. The majority of the breast cancers express the estrogen receptor alpha (ER), which plays a pivotal role in the pathobiology of the disease and are therefore classified as ER-positive (ER+). In fact, targeting of the ER signaling pathway is the main therapeutic strategy for ER+ breast cancer. Despite the success of endocrine therapy, intrinsic and acquired resistance are reported in 30-50% of the ER+ breast cancers. However, the mechanisms underlying ER heterogeneity and therapeutic resistance are far from being fully disclosed, and efficacious clinical strategies to overcome resistance are still pending. One of the hurdles in studying ER+ breast cancer resistance is related with the scarcity of experimental models that can recapitulate ER heterogeneity and signaling. This is the case of ER+ breast cancer cell models, typically based on cells derived from metastasis, which also fail to recapitulate tumor complexity. Primary cultures of patient-derived breast cancer cells are difficult to establish, and generally characterized by stromal fibroblasts overgrowth and rapid loss of phenotypic and molecular traits of the tumor cells, including ER expression. Ex vivo cultures of breast cancer tissue have been reported to retain the tissue architecture, with preservation of the tumor microenvironment (TME) and ER expression for short periods of time.Given the cumulating evidence on the role of the TME in sustaining ER+ tumor cells, we hypothesized that TME preservation in culture would favor the long-term retention of ER expression and signaling. We employed alginate encapsulation to provide a supporting scaffold to breast cancer tissue microstructures, coupled to dynamic culture to improve the lifespan of the culture by avoiding diffusional limitations. In this chapter, we provide a detailed description of this culture methodology, which has been previously published by our group (Cartaxo et al., J Exp Clin Cancer Res 39:161, 2020), based on electrostatically driven breast cancer tissue encapsulation in alginate, coupled to culture under agitation in a defined culture medium. We also describe challenge of the ex vivo model with an ER activator and inhibitors (anti-endocrine drugs) and a gene expression endpoint of drug response using reverse transcription PCR-based analysis of three distinct genes downstream of ER.
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Affiliation(s)
- Giacomo Domenici
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Gonçalo Trindade
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Marta F Estrada
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Ana Luísa Cartaxo
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Paula M Alves
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Saudade André
- IPOLFG, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - Catarina Brito
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.
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Abstract
Globally, the most frequent route of HIV transmission is through sexual intercourse. In women, sexual transmission of HIV involves cervical, vaginal, endometrial, and rectal mucosal exposure to the virus. Here we describe technical protocols for ex vivo cervical, vaginal, and rectal tissue infection models and cultures that can be used to assess tissue susceptibility to infection under different conditions as well as the potential antiviral efficacy of a treatment for HIV prevention or cure.
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Affiliation(s)
| | - Nikolas C Vann
- CONRAD, Eastern Virginia Medical School, Norfolk, VA, USA
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9
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Moyle LA, Davoudi S, Gilbert PM. Innovation in culture systems to study muscle complexity. Exp Cell Res 2021; 411:112966. [PMID: 34906582 DOI: 10.1016/j.yexcr.2021.112966] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 10/31/2021] [Accepted: 12/04/2021] [Indexed: 11/19/2022]
Abstract
Endogenous skeletal muscle development, regeneration, and pathology are extremely complex processes, influenced by local and systemic factors. Unpinning how these mechanisms function is crucial for fundamental biology and to develop therapeutic interventions for genetic disorders, but also conditions like sarcopenia and volumetric muscle loss. Ex vivo skeletal muscle models range from two- and three-dimensional primary cultures of satellite stem cell-derived myoblasts grown alone or in co-culture, to single muscle myofibers, myobundles, and whole tissues. Together, these systems provide the opportunity to gain mechanistic insights of stem cell behavior, cell-cell interactions, and mature muscle function in simplified systems, without confounding variables. Here, we highlight recent advances (published in the last 5 years) using in vitro primary cells and ex vivo skeletal muscle models, and summarize the new insights, tools, datasets, and screening methods they have provided. Finally, we highlight the opportunity for exponential advance of skeletal muscle knowledge, with spatiotemporal resolution, that is offered by guiding the study of muscle biology and physiology with in silico modelling and implementing high-content cell biology systems and ex vivo physiology platforms.
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Affiliation(s)
- Louise A Moyle
- Institute of Biomedical Engineering, Toronto, ON, M5S 3G9, Canada; Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, M5S 3E1, Canada
| | - Sadegh Davoudi
- Institute of Biomedical Engineering, Toronto, ON, M5S 3G9, Canada; Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, M5S 3E1, Canada
| | - Penney M Gilbert
- Institute of Biomedical Engineering, Toronto, ON, M5S 3G9, Canada; Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, M5S 3E1, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON, M5S 1A8, Canada.
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Alicea-Delgado M, García-Arrarás JE. Wnt/β-catenin signaling pathway regulates cell proliferation but not muscle dedifferentiation nor apoptosis during sea cucumber intestinal regeneration. Dev Biol 2021; 480:105-113. [PMID: 34481794 DOI: 10.1016/j.ydbio.2021.08.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/14/2022]
Abstract
Regeneration is a key developmental process by which organisms recover vital tissue and organ components following injury or disease. A growing interest is focused on the elucidation and characterization of the molecular mechanisms involved in these regenerative processes. We have now analyzed the possible role of the Wnt/β-catenin pathway on the regeneration of the intestine in the sea cucumber Holothuria glaberrima. For this we have studied the expression in vivo of Wnt-associated genes and have implemented the use of Dicer-substrate interference RNA (DsiRNA) to knockdown the expression of β-catenin transcript on gut rudiment explants. Neither cell dedifferentiation nor apoptosis were affected by the reduction of β-catenin transcripts in the gut rudiment explants. Yet, the number of proliferating cells decreased significantly following the interference, suggesting that the Wnt/β-catenin signaling pathway plays a significant role in cell proliferation, but not in cell dedifferentiation nor apoptosis during the regeneration of the intestine. The development of the in vitro RNAi protocol is a significant step in analyzing specific gene functions involved in echinoderm regeneration.
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Affiliation(s)
- Miosotis Alicea-Delgado
- Biology Department, University of Puerto Rico - Río Piedras Campus, San Juan, PR, 00925, USA
| | - José E García-Arrarás
- Biology Department, University of Puerto Rico - Río Piedras Campus, San Juan, PR, 00925, USA.
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Rastogi A. An approach to grossing of hepatectomy specimens. INDIAN J PATHOL MICR 2021; 64:S121-S126. [PMID: 34135153 DOI: 10.4103/ijpm.ijpm_870_20] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Liver resections are performed for acute and chronic end stage liver failure, primary and secondary liver malignancies as well as for several other neoplastic and non-neoplastic conditions. Hepatectomy specimens can be total, partial, or wedge resections. These specimens are relatively rare and complex. Meticulous handling, orientation, dissection, margin assessment, and reporting as per the latest guidelines, often require a multidisciplinary approach. This article discusses the approach to grossing of hepatectomy specimens, and the most important macroscopic considerations for specific conditions.
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Affiliation(s)
- Archana Rastogi
- Department of Pathology, Institute of Liver and Biliary Sciences, Delhi, India
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12
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Martín-Martín A, Tejedor L, Tafalla C, Díaz-Rosales P. Potential of the Escherichia coli LT(R192G/L211A) toxoid as a mucosal adjuvant for rainbow trout (Oncorhynchus mykiss). Fish Shellfish Immunol 2020; 105:310-318. [PMID: 32702476 DOI: 10.1016/j.fsi.2020.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/22/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
Oral vaccines are highly demanded by aquaculture sector that requires alternatives to injectable vaccines, involving fish handling, stress-related immunosuppression and mortalities. However, most previous attempts to obtain effective oral vaccines have failed due to a restricted tolerance mechanisms in intestine, whose mucosa is at the frontline of antigen encounter and has to balance the equilibrium between tolerance and immunity in a microbe-rich environment. Thus, the search for oral adjuvants that could augment immune responses triggered by antigens allowing them to circumvent intestinal tolerance is of great relevance. The present work focuses on the adjuvant potential of the Escherichia coli LT(R192G/L211A) toxoid (dmLT). To undertake an initial screening of the potential that dmLT has as an oral adjuvant in rainbow trout (Oncorhynchus mykiss), we have analyzed its transcriptional effects alone or in combination with Aeromonas salmonicida subsp. salmonicida or viral hemorrhagic septicemia virus (VHSV) on rainbow trout intestinal epithelial cell line RTgutGC and gut explants. Our results show that although dmLT provoked no significant effects by itself, it increased the transcription of pro-inflammatory cytokines and antimicrobial genes induced by the bacteria. In contrast, when combined with VHSV, dmLT only increased the transcription of Mx and the intracellular adhesion molecule 1 (ICAM1). Therefore, the protocol designed is an effective method to initially evaluate the effects of potential oral adjuvants, and points to dmLT as an effective adjuvant for oral antibacterial vaccines.
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Affiliation(s)
- Alba Martín-Martín
- Fish Immunology and Pathology Laboratory, Animal Health Research Centre (CISA-INIA), 28130, Valdeolmos, Madrid, Spain
| | - Lydia Tejedor
- Fish Immunology and Pathology Laboratory, Animal Health Research Centre (CISA-INIA), 28130, Valdeolmos, Madrid, Spain
| | - Carolina Tafalla
- Fish Immunology and Pathology Laboratory, Animal Health Research Centre (CISA-INIA), 28130, Valdeolmos, Madrid, Spain
| | - Patricia Díaz-Rosales
- Fish Immunology and Pathology Laboratory, Animal Health Research Centre (CISA-INIA), 28130, Valdeolmos, Madrid, Spain.
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Kher MM, Shekhawat MS, Nataraj M, Teixeira da Silva JA. Indian sarsaparilla, Hemidesmus indicus (L.) R. Br. ex Schult: tissue culture studies. Appl Microbiol Biotechnol 2020; 104:6463-79. [PMID: 32535696 DOI: 10.1007/s00253-020-10714-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/25/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
Hemidesmus indicus (L.) R. Br. ex Schult is commonly known as anantmul or Indian sarsaparilla. The roots of this plant, which display a wide range of medicinal, biological, and phytopharmaceutical properties, are used in the pharmaceutical and food industries. Conventionally, the plant is propagated by seed germination or vegetatively, but the efficacy of traditional methods has some limitations: plants derived from seed germination are prone to seed-borne diseases, or plantlet production using vegetative propagation is limited. In contrast, plant tissue culture allows for large-scale propagation and secondary metabolite production in vitro without sacrificing plants from their natural habitats. Many efforts have been made over 40 years of research to establish efficient micropropagation protocols to speed up cultivation of this plant, including callus-mediated in vitro propagation, somatic embryogenesis, and shoot multiplication using cotyledenory nodes, stem segments, shoot tips, and nodal explants. Among these explants, nodal explants are the most commonly used for H. indicus micropropagation. The application of adenine sulfate, citric acid, ascorbic acid, and arginine may be useful in preventing explant browning, premature leaf senescence, and shoot tip abscission during in vitro culture. This review provides insight into micropropagation, use of synthetic seeds for short-term germplasm preservation, and in vitro production of secondary metabolites such as 2-hydroxy-4-methoxybenzaldehyde, lupeol, vanillin, and rutin, from in vitro root and callus cultures. Furthermore, unexplored and possible innovative areas of research in Hemidesmus biotechnology are also discussed. KEY POINTS: • Hemidesmus indicus has multiple therapeutic applications. • H. indicus roots are used in confectionary and pharmacy. • This review comprehensively assesses H. indicus tissue culture. • Challenges and future research of H. indicus biotechnology are discussed.
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Abstract
The cultivation of corneal-limbal cells in vitro represents an excellent means to generate models to study cornea function and disease processes. These in vitro expanded cornea-limbal epithelial cell cultures are rich in stem cells for cornea, and hence can be used as a cell therapy for cornea-limbal deficiency. This chapter details the primary culture of these cornea-limbal cells, which can be used as model for further studies of the cornea surface.
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Affiliation(s)
- Finbarr O'Sullivan
- National Institute for Cellular Biotechnology and SSPC-SFI, Centre for Pharmaceuticals, Dublin City University, Dublin, Ireland.
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15
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Abstract
Particle bombardment or biolistic transformation is an efficient, versatile method. This method does not need any vector for the gene transfer and is not dependent on the cell type, species, and genotype. The success of any transformation technique depends on the starting experimental materials or the explants. Here, we describe the factors that have influenced the choice of explants in biolistic transformation. Many general factors in the selection of explants in the development of transgenic plants are presented here. Therefore, this chapter provides extensive guidelines regarding the choice of explants for researchers working on various plant genetic transformation techniques.
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16
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Abstract
There are many methods and techniques that can be used to transfer foreign genes into cells. In plant biotechnology, Agrobacterium-mediated transformation is a widely used traditional method for inserting foreign genes into plant genome and obtaining transgenic plants, particularly for dicot plant species. Agrobacterium-mediated transformation of cotton involves several important and also critical steps, which includes co-culture of cotton explants with Agrobacterium, induction and selection of stable transgenic cell lines, recovery of plants from transgenic cells majorly through somatic embryogenesis, and detection and expression analysis of transgenic plants. In this chapter, we describe a detailed step-by-step protocol for obtaining transgenic cotton plants via Agrobacterium-mediated transformation.
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17
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Teixeira da Silva JA, Gulyás A, Magyar-Tábori K, Wang MR, Wang QC, Dobránszki J. In vitro tissue culture of apple and other Malus species: recent advances and applications. Planta 2019; 249:975-1006. [PMID: 30788577 DOI: 10.1007/s00425-019-03100-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/25/2019] [Indexed: 05/08/2023]
Abstract
Studies on the tissue culture of apple have allowed for molecular, biotechnological and applied breeding research to advance. In the past 8 years, over 100 papers advancing basic biology, genetic transformation and cryobiology have emerged. Apple (Malus × domestica Borkh.; Rosaceae) is an important fruit crop grown mainly in temperate regions of the world. In vitro tissue culture is a biotechnological technique that has been used to genetically improve cultivars (scions) and rootstocks. This updated review presents a synthesis of findings related to the tissue culture of apple and other Malus spp. between 2010 and 2018. Increasingly complex molecular studies that are examining the apple genome, for example, in a bid to identify the cause of epigenetic mutations and the role of transposable elements in this process would benefit from genetically stable source material, which can be produced in vitro. Several notable or curious in vitro culture methods have been reported to improve shoot regeneration and induce the production of tetraploids in apple cultivars and rootstocks. Existing studies have revealed the molecular mechanism underlying the inhibition of adventitious roots by cytokinin. The use of the plant growth correction factor allows hypothetical shoot production from leaf-derived thin cell layers relative to conventional leaf explants to be determined. This updated review will allow novices and established researchers to advance apple and Malus biotechnology and breeding programs.
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Affiliation(s)
- Jaime A Teixeira da Silva
- , P.O. Box 7, Ikenobe, 3011-2, Kagawa-ken, 761-0799, Japan.
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Andrea Gulyás
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Katalin Magyar-Tábori
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Min-Rui Wang
- State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Qiao-Chun Wang
- State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Judit Dobránszki
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
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18
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Rice TF, Donaldson B, Bouqueau M, Kampmann B, Holder B. Macrophage- but not monocyte-derived extracellular vesicles induce placental pro-inflammatory responses. Placenta 2018; 69:92-95. [PMID: 30213492 PMCID: PMC6398160 DOI: 10.1016/j.placenta.2018.07.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/05/2018] [Accepted: 07/19/2018] [Indexed: 11/18/2022]
Abstract
The placenta sheds extracellular vesicles (EVs), including exosomes, into the maternal circulation. We recently demonstrated that this trafficking of EVs is bi-directional; with uptake of macrophage exosomes by the placenta inducing cytokine release. The specificity of this response is currently unknown. THP-1 cells were cultured as monocytes or differentiated to macrophages, and EVs isolated by ultra-centrifugation. The effect of EVs on human placental explants was measured by cytokine ELISA/luminex. Macrophage, but not monocyte, EVs induce the release of pro-inflammatory cytokines by the placenta. Thus, placental responses to immune cell EVs, including exosomes, reflects the phenotype of the source cell.
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Affiliation(s)
- Thomas F Rice
- Section of Paediatrics, Department of Medicine, Imperial College London, UK
| | - Beverly Donaldson
- Section of Paediatrics, Department of Medicine, Imperial College London, UK
| | - Marielle Bouqueau
- Section of Paediatrics, Department of Medicine, Imperial College London, UK
| | - Beate Kampmann
- Section of Paediatrics, Department of Medicine, Imperial College London, UK; Vaccines & Immunity Theme, MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, Gambia; The Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Beth Holder
- Section of Paediatrics, Department of Medicine, Imperial College London, UK; Vaccines & Immunity Theme, MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, Gambia.
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19
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Abstract
Glaucoma is marked by a progressive degeneration of the optic nerve and delayed loss of retinal ganglion cells (RGCs), the projection neurons of the eye. Because RGCs are not replaced and because surviving RGCs cannot regenerate their axons, the visual loss in glaucoma is largely irreversible. Here, we describe methods to evaluate treatments that may be beneficial for treating glaucoma using in vitro cell culture models (immunopanning to isolate neonatal RGCs, dissociated mature retinal neurons, retinal explants) and in vivo models that test potential treatments or investigate underlying molecular mechanisms in an intact system. Potentially, use of these models can help investigators continue to improve treatments to preserve RGCs and restore visual function in patients with glaucoma.
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Affiliation(s)
- Yuqin Yin
- Department of Neurosurgery, F.M. Kirby Neurobiology Center, Boston Children's Hospital, CLS 13030-15, 3 Blackfan Circle, 300 Longwood Ave., Boston, MA, 02115, USA.
- Department of Neurosurgery, Harvard Medical School, Boston, MA, 02115, USA.
| | - Larry I Benowitz
- Department of Neurosurgery, F.M. Kirby Neurobiology Center, Boston Children's Hospital, CLS 13030-15, 3 Blackfan Circle, 300 Longwood Ave., Boston, MA, 02115, USA
- Department of Neurosurgery, Harvard Medical School, Boston, MA, 02115, USA
- Department of Ophthalmology, Harvard Medical School, Boston, MA, 02115, USA
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20
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Maidana LG, Gerez J, Pinho F, Garcia S, Bracarense APFL. Lactobacillus plantarum culture supernatants improve intestinal tissue exposed to deoxynivalenol. ACTA ACUST UNITED AC 2017; 69:666-671. [PMID: 28774728 DOI: 10.1016/j.etp.2017.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/14/2017] [Accepted: 06/19/2017] [Indexed: 01/01/2023]
Abstract
In the present study, histological, morphometrical and ultrastructural analysis were performed to investigate intestinal mucosa changes in piglets exposed to deoxynivalenol alone or associated with two strains of Lactobacillus plantarum and the respective culture supernatants. Jejunal explants were incubated for 4h in culture medium with a) only culture medium (DMEM, control group), b) deoxynivalenol (DON, 10μM), c) heat-inactivated Lactobacillus plantarum strain1 - LP1 (1.1×108 CFU/ml) plus DON, d) heat-inactivated Lactobacillus plantarum strain2-LP2 (2.0×109 CFU/ml) plus DON, e) heat-inactivated Lactobacillus plantarum strain1 culture supernatant (CS1) plus DON, and f) heat-inactivated Lactobacillus plantarum strain1 culture supernatant (CS1) plus DON. Explants exposed to DON and DON plus LP1 and LP2 showed a significant increase in histological changes (mainly villi atrophy and apical necrosis) and a significant decrease in villi height when compared to unexposed explants. However, explants treated with CS1+DON and CS2+DON remained similar to the control group both in histological and morphometrical aspects. DON also induced a significant decrease in goblet cell density compared to control whereas CS1+DON treatment induced an increase in the number of goblet cells in comparison to DON explants. In addition, ultrastructural assessment showed control, CS1+DON and CS2+DON explants with well delineated finger shape villi, meanwhile DON-treated, LP1+DON and LP2+DON explants showed a severe villi atrophy with leukocytes exudation on the intestinal surface. Taken together, our results indicate that the culture supernatant treatment reduced the toxic effects induced by DON on intestinal tissue and may contribute as an alternative strategy to reduce mycotoxin toxicity.
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Affiliation(s)
- L G Maidana
- Universidade Estadual de Londrina, Laboratory of Animal Pathology, Campus Universitário, Rodovia Celso Garcia Cid, Km 380, Londrina, Paraná 86051-990, Brazil
| | - J Gerez
- Universidade Estadual de Londrina, Laboratory of Animal Pathology, Campus Universitário, Rodovia Celso Garcia Cid, Km 380, Londrina, Paraná 86051-990, Brazil
| | - F Pinho
- Universidade Estadual de Londrina, Laboratory of Animal Pathology, Campus Universitário, Rodovia Celso Garcia Cid, Km 380, Londrina, Paraná 86051-990, Brazil
| | - S Garcia
- Universidade Estadual de Londrina, Laboratory of Food Technology, Campus Universitário, Rodovia Celso Garcia Cid, Km 380, Londrina, Paraná 86051-990, Brazil
| | - A P F L Bracarense
- Universidade Estadual de Londrina, Laboratory of Animal Pathology, Campus Universitário, Rodovia Celso Garcia Cid, Km 380, Londrina, Paraná 86051-990, Brazil.
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21
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Abstract
Microfluidic culture of primary adipose tissue allows for reduced sample and reagent volumes as well as constant media perfusion of the cells. By continuously flowing media over the tissue, microfluidic sampling systems can more accurately mimic vascular flow in vivo. Quantitative measurements can be performed on or off chip to provide time-resolved secretion data, furthering insight into the dynamics of the function of adipose tissue. Buoyancy resulting from the large lipid storage capacity in this tissue presents a unique challenge for culture, and it is important to account for this buoyancy during microdevice design. Herein, we describe approaches for microfluidic device fabrication that utilize 3D-printed interface templating to help counteract cell buoyancy. We apply such methods to the culture of both isolated, dispersed primary adipocytes and epididymal adipose explants. To facilitate more widespread adoption of the methodology, the devices presented here are designed for user-friendly operation. Only handheld syringes are needed to control flow, and devices are inexpensive and disposable.
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22
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Mushke R, Yarra R, Bulle M. Efficient in vitro direct shoot organogenesis from seedling derived split node explants of maize ( Zea mays L.). J Genet Eng Biotechnol 2016; 14:49-53. [PMID: 30647596 PMCID: PMC6299849 DOI: 10.1016/j.jgeb.2016.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/04/2016] [Accepted: 03/23/2016] [Indexed: 11/16/2022]
Abstract
Maize is one of the important cereal crops around the world. An efficient and reproducible regeneration protocol via direct organogenesis has been established using split nodes as ex-plants derived from 7 to 10 day old in vitro grown seedlings. Surface sterilized maize seeds were germinated on MS medium lacking plant growth regulators. Nodal sections of 7–10 day old seedlings were isolated, split longitudinally into two halves and cultured on regeneration medium containing different concentrations of 6-benzyladenine (2.20, 4.40, 6.60, 8.80, 11.0 and 13.2 μM) or kinetin (2.32, 4.65, 6.97, 9.29, 11.6 and 13.9 μM). Inclusion of 8.80 μM BA into MS supplemented medium triggered a high frequency of regeneration response from split node explants with a maximum number of shoots (12.0 ± 1.15) and the highest shoot length (3.0 ± 0.73) was obtained directly (without an intervening callus phase) within 4 weeks of culture. Further shoot elongation was achieved on medium containing 4.40 μM BA. The elongated micro shoots were rooted on MS medium fortified with 1.97 μM indole-3-butyric acid. The regenerated plantlets with roots were successfully hardened on earthen pots after proper acclimatization under greenhouse conditions. This new efficient regeneration method provides a solid foundation for genetic manipulation of maize for biotic and abiotic stresses and to enhance the nutritional values.
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Affiliation(s)
- Ramesh Mushke
- Centromere Bio solutions Pvt. Ltd, Vibha Seeds Group, Agri Science Park, ICRISAT, Patancheru, Hyderabad, Telangana State, India
| | - Rajesh Yarra
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana State 500046, India
| | - Mallesham Bulle
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana State 500046, India
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23
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Ramakrishna D, Shasthree T. High efficient somatic embryogenesis development from leaf cultures of Citrullus colocynthis (L.) Schrad for generating true type clones. Physiol Mol Biol Plants 2016; 22:279-285. [PMID: 27436919 PMCID: PMC4938824 DOI: 10.1007/s12298-016-0357-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 03/29/2016] [Accepted: 05/23/2016] [Indexed: 06/06/2023]
Abstract
We report an efficient somatic embryogenesis and plant regeneration system using leaf cultures of Citrullus colocynthis (L.) and assessed the effect of plant growth regulators on the regeneration process. Initially leaf explants were cultured on Murashige and Skoog medium supplemented with different concentrations of auxins viz., 2,4-dichlorophenoxyacetic acid, 1-naphthaleneacetic acid, gibberellic acid alone and along with combination of 6-benzylaminopurine. The different forms of calli such as compact, white friable, creamy friable, brownish nodular, green globular and green calli were induced from the leaf explants on MS medium containing different concentrations of auxins and gibberellins. Subsequently initial callus was subcultured at 1.5 mg L(-1) BAP + 1.0 mg L(-1) 2,4-D which resulted in 25 % somatic embryos from 85 % nodular embryogenic nodular callus that is highest percentage. Similarly the lowest percentage of somatic embryos was recorded at 2.5 mg L(-1) BAP + 0.5 mg L(-1) NAA from 55 % embryogenic globular callus i.e., 16 %. High frequency of embryo development takes place at intermittent light when compared with continuous light in the individual subcultures. The cotyledonary embryos were developed into complete platelets on MS medium. In vitro regenerated plantlets were washed to remove the traces of agar and then transferred to sterile vermiculite and sand (2:1) containing pot.
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Affiliation(s)
- D. Ramakrishna
- Department of Biotechnology, Kakatiya University, Warangal, Telangana India
| | - T. Shasthree
- Department of Biotechnology, Kakatiya University, Warangal, Telangana India
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24
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Abstract
The complex functions of the gastrointestinal tract rely on the coordinated interplay of several cell and tissue types involving epithelium, connective tissue, smooth muscles as well as cells of the immune and nervous system. It is therefore obvious, that these functions can hardly be investigated sufficiently using cell lines or two-dimensional cell cultures.Here, we describe an easy to produce three-dimensional organotypical explants culture from fetal and neonatal murine colon. This model is suitable for in vitro testing of intestinal function or the evaluation of developmental or pathological processes.
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Affiliation(s)
- Peter H Neckel
- Institute of Clinical Anatomy and Cell Analysis, Eberhard Karls University Tübingen, Österbergstrasse 3, 72074, Tübingen, Germany
| | - Lothar Just
- Institute of Clinical Anatomy and Cell Analysis, Eberhard Karls University Tübingen, Österbergstrasse 3, 72074, Tübingen, Germany.
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25
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Tan SJ, Hewitson TD. Propagation and Culture of Human Renal Fibroblasts. Methods Mol Biol 2016; 1397:11-23. [PMID: 26676123 DOI: 10.1007/978-1-4939-3353-2_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The renal fibroblast and phenotypically related myofibroblast are universally present in all forms of progressive kidney disease. The in vitro study of the fibroblast, its behavior, and factors affecting its activity is therefore key to understanding both its role and significance. In this protocol, we describe a reproducible method for selective propagation and culture of primary human renal fibroblasts from the human kidney cortex. Techniques for their isolation, subculture, characterization, and cryogenic storage and retrieval are described in detail.
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26
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Esposito-Polesi NP, de Andrade PA, de Almeida CV, Andreote FD, de Almeida M. Endophytic bacterial communities associated with two explant sources of Eucalyptus benthamii Maiden & Cambage. World J Microbiol Biotechnol 2015; 31:1737-46. [PMID: 26377625 DOI: 10.1007/s11274-015-1924-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 08/11/2015] [Indexed: 10/23/2022]
Abstract
Micropropagation has been applied in the recovery and rejuvenation of adult trees, which is achieved by various subcultures in the multiplication phase. This strategy has brought questions about the endophytic microbiota associated with these plants along its manipulation. Therefore, the aim of this study was to evaluate the composition of the endophytic bacterial communities associated with two explants sources [the canopy branches (CB) and the trunk base of the tree (TB)] under prolonged in vitro cultivation. In addition we analyzed the bacterial community dynamic along the subcultures in different micropropagation phases. Bacterial DNA was extracted from samples of mini-stumps (in vivo) from CB and TB and in micro-stumps produced by in vitro cultivations of these explants sources--both originated from one single matrix plant of Eucalyptus benthamii. In vitro establishment occurred in two dates and the evaluation of endophytic bacterial communities was made in vivo and in vitro samples (on 10th, 13th and 16th subcultures), when elongated shoots and roots were analyzed. Analysis was performed by PCR-DGGE based on the V6 region of ribosomal gene 16S rDNA. Bands profiles showed differences in communities between in vivo and in vitro samples, and also distinctions of communities assessed in the subcultures, elongated and rooted samples. Distinctions in the composition of endophytic bacterial communities were greater in CB micro-stumps. These results indicate a differential colonization of explants by endophytic bacteria, with predominance of common (ever-present) endophytes in TB samples and casual, here named opportunistic, in CB samples.
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27
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Li Y, Van Cleemput J, Qiu Y, Reddy VRAP, Mateusen B, Nauwynck HJ. Ex vivo modeling of feline herpesvirus replication in ocular and respiratory mucosae, the primary targets of infection. Virus Res 2015; 210:227-31. [PMID: 26277778 DOI: 10.1016/j.virusres.2015.08.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 08/07/2015] [Accepted: 08/10/2015] [Indexed: 01/24/2023]
Abstract
Feline herpesvirus 1 (FeHV-1) is a major cause of rhinotracheitis and ocular diseases in cats. In the present study, the viral replication at the primary infection sites was studied using feline respiratory and ocular mucosa explants. The explants of three cats were maintained in an air-liquid culture up to 96 hours without loss of viability. After inoculation with FeHV-1 (C27), no evidence of infection was noted in corneal epithelium, while plaque-wise replication was observed in conjunctival and tracheal mucosae beginning from 24 h post inoculation (hpi). The viral plaque diameters increased over time in trachea and conjunctiva and were larger in tracheal explants than in conjunctival explants at 48 hpi. FeHV-1 penetrated the basement membrane in conjunctival and tracheal explants between 24 and 48 hpi. At 48 and 72 hpi, viral invasion was going deeper in tracheal explants than in conjunctival explants. Our study indicates that FeHV-1 has a better capacity to invade the respiratory mucosa than the conjunctival mucosa, and prefers the conjunctiva, but not the cornea as a portal of entry during ocular infection.
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Affiliation(s)
- Yewei Li
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - Jolien Van Cleemput
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - Yu Qiu
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - Vishwanatha R A P Reddy
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - Bart Mateusen
- Dierenartsencentrum Vaccavet, Gravin Madeleine d'Alcantaralaan 41, 9971 Lembeke, Belgium
| | - Hans J Nauwynck
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
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28
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Abstract
Gerbera jamesonii (gerbera) is an important cut-flower in the global floricultural industry. Micropropagation is the main system used to clonally propagate gerbera in vitro resulting in the production of millions of plantlets each year. Numerous types of explants and protocols for micropropagation have been established and used for gerbera. Shoot tips are the commonly used explant while adventitious shoot induction from the capitulum is also a popular method. Most papers in the literature have focused on testing the influence of different types and combinations of plant growth regulators with the aim of improving the regeneration and multiplication stage of one or few cultivars. Genotype is one of the most influential factors on the response of gerbera in vitro. Despite this, no successful universal protocol has yet been developed for multiple cultivars, limiting the usefulness of current protocols for commercial biotechnology labs. Slow-growing endogenous bacteria are one of the most important problems in gerbera micropropagation but require more studies on control and prevention. Individual shoots are normally easy to root, usually in excess of 90% of plantlets, but the acclimatization stage requires improvements and new technologies to increase the survival of plants. Epigenetic variations in micropropagated gerbera are frequently observed only with high concentrations of cytokinins in the culture medium but somaclonal variation is rare.
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Affiliation(s)
- Jean C Cardoso
- Depto. de Desenvolvimento Rural, Centro de Ciências Agrárias/Universidade Federal de São Carlos (CCA/UFSCAR), Rod. Anhanguera, km 174, CEP 13600-000 Araras, Brazil.
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29
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Hick AC, Delmarcelle AS, Bouquet M, Klotz S, Copetti T, Forez C, Van Der Smissen P, Sonveaux P, Collet JF, Feron O, Courtoy PJ, Pierreux CE. Reciprocal epithelial:endothelial paracrine interactions during thyroid development govern follicular organization and C-cells differentiation. Dev Biol 2013; 381:227-40. [PMID: 23707896 DOI: 10.1016/j.ydbio.2013.04.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 03/25/2013] [Accepted: 04/09/2013] [Indexed: 11/27/2022]
Abstract
The thyroid is a highly vascularized endocrine gland, displaying a characteristic epithelial organization in closed spheres, called follicles. Here we investigate how endothelial cells are recruited into the developing thyroid and if they control glandular organization as well as thyrocytes and C-cells differentiation. We show that endothelial cells closely surround, and then invade the expanding thyroid epithelial cell mass to become closely associated with nascent polarized follicles. This close and sustained endothelial:epithelial interaction depends on epithelial production of the angiogenic factor, Vascular Endothelial Growth Factor-A (VEGF-A), as its thyroid-specific genetic inactivation reduced the endothelial cell pool of the thyroid by > 90%. Vegfa KO also displayed decreased C-cells differentiation and impaired organization of the epithelial cell mass into follicles. We developed an ex vivo model of thyroid explants that faithfully mimicks bilobation of the thyroid anlagen, endothelial and C-cells invasion, folliculogenesis and differentiation. Treatment of thyroid explants at e12.5 with a VEGFR2 inhibitor ablated the endothelial pool and reproduced ex vivo folliculogenesis defects observed in conditional Vegfa KO. In the absence of any blood supply, rescue by embryonic endothelial progenitor cells restored folliculogenesis, accelerated lumen expansion and stimulated calcitonin expression by C-cells. In conclusion, our data demonstrate that, in developing mouse thyroid, epithelial production of VEGF-A is necessary for endothelial cells recruitment and expansion. In turn, endothelial cells control epithelial reorganization in follicles and C-cells differentiation.
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Affiliation(s)
- Anne-Christine Hick
- de Duve Institute, Université catholique de Louvain (UCL), B-1200 Brussels, Belgium
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30
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Abstract
Explants used in retinal reattachment surgery occasionally extrude. Cheese-wiring of the suture through the sclera consequent to raised intraocular pressure allows the buckle to loosen and/or unfold. Subsequent infection, often with Staphylococcus albus, accelerates the process of extrusion. Commonly, such explants are of silicone sponge. The reported case is unusual in that the extrusion occurred through the upper lid, and involved a solid silicone explant.
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31
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Bozhkova V, Te Kronnie G, Timmermans LP. Mesoderm differentiation in explants of carp embryos. Rouxs Arch Dev Biol 1994; 204:20-9. [PMID: 28305802 DOI: 10.1007/BF00189064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/30/1993] [Accepted: 03/10/1994] [Indexed: 10/18/2022]
Abstract
An analysis of carp blastoderm development was carried out in culture after isolation from the yolk cell and its yolk syncytial layer (YSL). The blastoderms were separated from the YSL at four different stages of embryogenesis: the blastula, early epiboly, early gastrula and late gastrula stages. Absence of the YSL in explants was checked by scanning electron microscopy. From observations of living embryos and histological examination of tissues which were formed in explants from all stages studied it was observed that they contained notochordal, muscle and neural tissue as signs of dorsal types of differentiation. Only in explants from the early and late gastrula stages were histotypical tissues organized in an embryonic-like body pattern. The data indicate that mesoderm differentiation in fish embryos is independent from the YSL, contrary to normal pattern formation which needs the presence of the YSL before the onset of gastrulation.
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32
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Klein SL, Jacobson M. In vitro evidence that interactions betweenXenopus blastomeres restrict cell migration. Dev Genes Evol 1990; 199:237-245. [PMID: 28306109 DOI: 10.1007/bf01682083] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/1990] [Accepted: 08/03/1990] [Indexed: 11/26/2022]
Abstract
The consistency of the frog blastula's fate map is produced, in part, because the progeny of blastomeres located in dfferent regions do not intermix with one another. We examined the cause for this restriction of intermixing in two types of cultures. In one type of culture, two groups of cells were excised from blastulae and stuck together; the movement of cells between the groups was monitored. Cells migrated more extensively between groups derived from the same region than between groups derived from different regions. In the other type of culture, a single cell was implanted into a group of cells that was excised from the blastula. The rate of division and the extent of migration of the implanted cell's clone were monitored. The implanted cell divided more rapidly among cells from its own region than among cells from a different region. Both experiments show that the restriction of intermixing that occurs between regions of the intact embryo also occurs in vitro. These results indicate that the restriction does not result secondarily from normal morphogenetic movements, which are absent from the explants, but probably from cellular interactions that limit the extent of cell migration. This limitation is correlated with a reduction in the rate of cell division.
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Affiliation(s)
- Steven L Klein
- Department of Anatomy, University of Utah, 84132, Salt Lake City, Utah, USA
| | - Marcus Jacobson
- Department of Anatomy, University of Utah, 84132, Salt Lake City, Utah, USA
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