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Luna-Callejas B, Oropeza-Ramos L, Ramón-Gallegos E. Comparative genomic analysis of Mycoplasma related to cell culture for infB gene-based loop-mediated isothermal amplification. World J Microbiol Biotechnol 2023; 39:355. [PMID: 37878143 DOI: 10.1007/s11274-023-03794-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 10/06/2023] [Indexed: 10/26/2023]
Abstract
Mycoplasma contamination in cell culture affects the properties of cell lines. Gold standard detection by microbiological culture takes days and requires specialists. The polymerase chain reaction and loop-mediated isothermal amplification (LAMP) are fast molecular options, but LAMP only requires one heating block for DNA amplification. This study presents a comparative genomic analysis of Mycoplasma species to identify common target genes different from the rrsA gene, which encodes 16 S rRNA. The aim is to implement a LAMP assay to detect Mycoplasma species, reducing the time and specialized equipment required for detection. We performed a comparative genomic analysis through Mauve software and the GView server and selected infB and clpB genes as target candidates for designing LAMP primers. We evaluated both genes by multiple sequence alignment (MSA). The infB gene presented the best score MSA assessment with lower odd-log values (5,480,281) than other genes. We selected the infB gene to design LAMP primers specific to Mycoplasma spp. We used these primers to implement LAMP at 63 °C for 30 min, which showed 100% positive amplifications for detecting Mycoplasma spp. In conclusion, we present a methodology utilizing the infB gene-based LAMP assay to detect three of the six most prevalent Mycoplasma species in cell culture.
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Affiliation(s)
- Benjamín Luna-Callejas
- Facultad de Ingeniería, Universidad Nacional Autónoma de México, 04510, Mexico City, México
- Department of Morphology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, 07738, Mexico City, México
| | - Laura Oropeza-Ramos
- Facultad de Ingeniería, Universidad Nacional Autónoma de México, 04510, Mexico City, México
| | - Eva Ramón-Gallegos
- Department of Morphology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, 07738, Mexico City, México.
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2
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HoBi-like Pestivirus Is Highly Prevalent in Cattle Herds in the Amazon Region (Northern Brazil). Viruses 2023; 15:v15020453. [PMID: 36851667 PMCID: PMC9965828 DOI: 10.3390/v15020453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/23/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
Pestiviruses are globally distributed and cause substantial economic losses to the cattle industry. In Brazil, the country with the world's largest cattle population, pestivirus infections are well described in some regions, such as in the south, where a high frequency of BVDV-2 is described and contrasts with the high prevalence of HoBi-like pestivirus (HoBiPeV) in the northeast. However, there is a lack of information about pestiviruses in the Amazon Region, in northern Brazil, with a cattle population estimated at 55.7 million head, which has a significant impact on the international livestock market. Therefore, this study investigated the seroprevalence and genetic variability of ruminant pestiviruses in 944 bovine serum samples from four states in northern Brazil: Pará (PA), Amapá (AP), Roraima (RR), and Amazonas (AM). Our results showed that 45.4% of the samples were seropositive (19.8% for BVDV-1, 14.1% for BVDV-2, and 20.9% for HoBiPeV). All samples were tested by RT-qPCR, and three were positive and classified as HoBiPeV in a phylogenetic analysis. These serological and molecular results contrast with those from other regions of the world, suggesting that the northern Brazilian states have a high prevalence of all bovine pestiviruses including HoBiPeV.
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Yan Y, Yang D, Wen P, Li Y, Ge Y, Ma P, Yuan J, Zhang P, Zhu Z, Luo X, Yu X, Wang H. Expression analysis of irisin during different development stages of skeletal muscle in mice. Gene Expr Patterns 2022; 46:119287. [PMID: 36341975 DOI: 10.1016/j.gep.2022.119287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 10/16/2022] [Accepted: 10/24/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND As a newly discovered muscle factor secreted by skeletal muscle cells, irisin is a polypeptide fragment formed from hydrolysis of fibronectin type Ⅲ domain-containing protein 5 (FNDC5). Irisin can promote beigeing of white adipose tissue (WAT) and regulate glucose and lipid metabolisms. However, the functions of irisin in skeletal muscle development remain largely unknown. In order to characterize the expression of irisin, this study investigated the expression of irisin precursor FNDC5 in myoblasts and skeletal muscles during different developmental stages of SPF mice. RESULTS The Western blot, quantitative real-time PCR (qRT-PCR), and immunofluorescence assay results showed that FNDC5 was expressed in all the developmental stages of myoblasts and gastrocnemius, but its expression differed at different stages. FNDC5 protein exhibited the highest expression in gastrocnemius of sexually mature mice, followed by elderly mice and adolescent mice, and it displayed the lowest expression in pups. Additionally, FNDC5 protein was mainly expressed in cytoplasm, and it had the highest expression in primary myoblasts, followed by the myotubes with the lowest expression in C2C12 myogenic cells. CONCLUSIONS Overall, FNDC5 was mainly expressed in cytoplasm and extracellular matrix with different expression levels at different developmental stages of skeletal muscle cells and tissues in mice. This study will provide new strategies for promoting skeletal muscle development and treating muscle- and metabolism-related disease by using irisin.
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Affiliation(s)
- Yi Yan
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Ding Yang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pei Wen
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Yilei Li
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Yufang Ge
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pei Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Jiahui Yuan
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pengxiang Zhang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Zhiwei Zhu
- College of Life Science, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Xiaomao Luo
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Xiuju Yu
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Haidong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China.
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Dennert K, Kumar R. Traceability Methods for Cell Line Authentication and Mycoplasma Detection. SLAS Technol 2021; 26:630-636. [PMID: 34282690 DOI: 10.1177/24726303211030290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Many laboratories struggle with mycoplasma contamination and cell line misidentification when growing cells in culture. These well-documented issues affect the scientific research community and have detrimental downstream effects. Research published with suspect cultures can produce misleading results. There is increasing pressure to verify the integrity of experimental and established cell lines before publishing. Therefore, laboratories need to define how and when to perform these critical tests, analyze the results, and determine action plans if disparities exist. Our laboratory is committed to producing cell lines of the highest quality for use in experiments; thus, we created a surveillance strategy for these potential problems. We developed processes for both testing and tracing cell line authentication and mycoplasma detection data. Using these methods, we can protect the integrity of our patient and commercial cell lines, maintaining reliable cultures for our research.
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Affiliation(s)
- Kate Dennert
- Advocate Aurora Research Institute Discovery Lab, Aurora Sinai Medical Center, Advocate Aurora Health, Milwaukee, WI, USA
| | - Rajeev Kumar
- Advocate Aurora Research Institute Discovery Lab, Aurora Sinai Medical Center, Advocate Aurora Health, Milwaukee, WI, USA
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Pizato N, Kiffer LFMV, Luzete BC, Assumpção JAF, Correa LH, Melo HABD, Sant'Ana LPD, Ito MK, Magalhães KG. Omega 3-DHA and Delta-Tocotrienol Modulate Lipid Droplet Biogenesis and Lipophagy in Breast Cancer Cells: the Impact in Cancer Aggressiveness. Nutrients 2019; 11:E1199. [PMID: 31141912 PMCID: PMC6627337 DOI: 10.3390/nu11061199] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 12/21/2022] Open
Abstract
Omega 3-docosahexaenoic acid (DHA) and vitamin E Delta-tocotrienol (Delta-T3) are extensively studied as protective nutrients against cancer development. Little is known about the biological mechanisms targeted by these bioactive molecules on lipid droplet (LD) biogenesis, an important breast cancer aggressiveness marker, and the occurrence of lipophagy in breast cancer cells. The aim of this study was to investigate the effect of DHA, Delta-T3 and DHA plus Delta-T3 co-treatment in LD biogenesis and lipophagy process in triple negative breast cancer cell line MDA-MB-231. Cells were treated with 50 μM DHA and/or 5 μM Delta-T3. Our results demonstrated that DHA can trigger an increase in LD biogenesis and co-treatment with Delta-T3 was able to reduce this LD biogenesis. In addition, we showed that a higher cytoplasmic LD content is associated with a higher breast cancer cells malignance and proliferation. Reduction of cytoplasmic LD content by silencing ADRP (adipose differentiation-related protein), a structural LD protein, also decreased cell proliferation in MDA-MB-231 cells. Treatment with DHA and Delta-T3 alone or co-treatment did not reduce cell viability. Moreover, we showed here that DHA can trigger lipophagy in MDA-MB-231 cells and DHA plus Delta-T3 co-treatment was able to enhance this lipophagy process. Our findings demonstrated that co-treatment with DHA plus Delta-T3 in MDA-MB-231 cells could reduce LD biogenesis and potentiate lipophagy in these cells, possibly having a positive impact to inhibit breast cancer malignancy. Therefore, suitable doses of DHA and Delta-T3 vitamin E isoform supplementation can be a prominent tool in therapeutic treatments against breast cancer.
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Affiliation(s)
- Nathalia Pizato
- Department of Nutrition, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Larissa Fernanda Melo Vasconcelos Kiffer
- Department of Nutrition, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Beatriz Christina Luzete
- Department of Nutrition, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - José Antonio Fagundes Assumpção
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Luis Henrique Correa
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Heloisa Antoniella Braz de Melo
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Lívia Pimentel de Sant'Ana
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Marina Kiyomi Ito
- Department of Nutrition, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, UnB, Brasilia 70910-900, Brazil.
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Molla Kazemiha V, Azari S, Habibi-Anbouhi M, Amanzadeh A, Bonakdar S, Shokrgozar MA, Mahdian R. Effectiveness of Plasmocure™ in Elimination of Mycoplasma Species from Contaminated Cell Cultures: A Comparative Study versus other Antibiotics. CELL JOURNAL 2019; 21:143-149. [PMID: 30825287 PMCID: PMC6397598 DOI: 10.22074/cellj.2019.5996] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 08/26/2018] [Indexed: 12/12/2022]
Abstract
Objective Mycoplasmas spp. is among major contaminants of eukaryotic cell cultures. They cause a wide range of problems
associated with cell culture in biology research centers or biotechnological companies. Mycoplasmas are also resistant to
several antibiotics. Plasmocin™ has been used to treat cell lines but Plasmocin™-resistant strains have been reported.
InvivoGen has developed a new anti-Mycoplasma agent called Plasmocure™ in order to eliminate resistant Mycoplasma
contamination. The aim of this study was the selection of the best antibiotics for treatment of mycoplasma in cell cultures.
Materials and Methods In this experimental study, a total of 100 different mammalian cell lines contaminated with different
Mycoplasma species were evaluated by microbiological culture (as the gold standard method), indirect DNA fluorochrome
staining, enzymatic (MycoAlert™), and universal or species-specific polymerase chain reaction (PCR) detection methods.
In this study, animal and human cell lines available in National Cell Bank of Iran, were treated with Plasmocure™. The
treatment efficacy and cytotoxicity of Plasmocure™ were compared with those of commonly used antibiotics such as BM-
cyclin, Plasmocin™, MycoRAZOR™, sparfloxacin and enrofloxacin.
Results Plasmocure™ is comprised of two antibiotics that act through various mechanisms of action than those in
Plasmocin™. Two-week treatment with Plasmocure™ was enough to completely eliminate Mycoplasma spp. A moderate
toxicity was observed during Mycoplasma treatment with plasmocure™; But, after elimination of Mycoplasma, cells were
fully recovered. Mycoplasma infections were eliminated by Plasmocure™, BM-cyclin, Plasmocin™, MycoRAZOR™,
sparfloxacin and enrofloxacin. However, the outcome of the treatment process (i.e. the frequency of complete cure,
regrowth or cell death) varied among different antibiotics.
Conclusion The highest number of cured cell lines was achieved by using Plasmocure™ which also had the lowest
regrowth rate after a period of four months. As a conclusion; Plasmocure™ might be considered an effective antibiotic to treat
Mycoplasma infections in mammalian cell cultures especially for precious or vulnerable cells.
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Affiliation(s)
| | - Shahram Azari
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | | | - Amir Amanzadeh
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | - Shahin Bonakdar
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | | | - Reza Mahdian
- Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran. Electronic Address:
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7
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Lai Y, Xu X, Yan R, Hua Z. Evaluation of mycoplasma removal reagents using qPCR-based quantification. Anal Biochem 2019; 564-565:88-95. [PMID: 30336125 DOI: 10.1016/j.ab.2018.10.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 10/09/2018] [Accepted: 10/10/2018] [Indexed: 11/30/2022]
Abstract
In this study, we evaluated the efficacy of various mycoplasma removal reagents using nuclear staining, DNA gel electrophoresis, and qPCR-based quantification. Our results showed Plasmocure and Plasmocin are two effective anti-mycoplasma reagents whose effects can be observed within a week. However, prolonged treatment with Plasmocin led to development of resistance. Withdrawal of anti-mycoplasma reagents led to reoccurrence of mycoplasma contamination, but addition of prevention reagent, such as Primocin, prevented recontamination. Therefore, sequential treatment by Plasmocure and Primocin is the best course of action against mycoplasma contamination. Lastly, we developed methods based on qPCR to estimate the average number of mycoplasma associated with a single contaminated cell. We have shown, for the first time, that untreated contaminated BEAS-2B cells have approximately 300-400 mycoplasma contaminants per cell in the cytoplasm or attached to the cell membrane. Furthermore, withdrawal of anti-mycoplasma reagents led to reoccurrence of mycoplasma contamination within two days, and therefore continued use of prevention reagent is imperative.
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Affiliation(s)
- Yueyang Lai
- School of Life Sciences and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Xuebo Xu
- School of Life Sciences and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Ruiying Yan
- School of Life Sciences and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Zichun Hua
- School of Life Sciences and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China; Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China.
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8
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Angart P, Kohnhorst C, Chiang MJ, Arden NS. Considerations for risk and control of mycoplasma in bioprocessing. Curr Opin Chem Eng 2018. [DOI: 10.1016/j.coche.2018.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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9
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Weng J, Li Y, Cai L, Li T, Peng G, Fu C, Han X, Li H, Jiang Z, Zhang Z, Du J, Peng Q, Gao Y. Elimination of Mycoplasma Contamination from Infected Human Hepatocyte C3A Cells by Intraperitoneal Injection in BALB/c Mice. Front Cell Infect Microbiol 2017; 7:440. [PMID: 29075618 PMCID: PMC5643414 DOI: 10.3389/fcimb.2017.00440] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 09/26/2017] [Indexed: 02/05/2023] Open
Abstract
Background/Aims: The use of antibiotics to eliminate Mycoplasma contamination has some serious limitations. Mycoplasma contamination can be eliminated by intraperitoneal injection of BALB/c mice with contaminated cells combined with screening monoclonal cells. However, in vivo passage in mice after injection with contaminated cells requires a long duration (20-54 days). Furthermore, it is important to monitor for cross-contamination of mouse and human cells, xenotropic murine leukemia virus-related virus (XMRV) infection, and altered cell function after the in vivo treatment. The present study aimed to validate a reliable and simplified method to eliminate mycoplasma contamination from human hepatocytes. BALB/c mice were injected with paraffin oil prior to injection with cells, in order to shorten duration of intraperitoneal passage. Cross-contamination of mouse and human cells, XMRV infection and cell function-related genes and proteins were also evaluated. Methods: PCR and DNA sequencing were used to confirm Mycoplasma hyorhinis (M. hyorhinis) contamination in human hepatocyte C3A cells. Five BALB/c mice were intraperitoneally injected with 0.5 ml paraffin oil 1 week before injection of the cells. The mice were then intraperitoneally injected with C3A hepatocytes (5.0 × 106/ml) contaminated with M. hyorhinis (6.2 ± 2.2 × 108 CFU/ml). Ascites were collected for monoclonal cell screening on the 14th day after injection of contaminated cells. Elimination of mycoplasma from cells was determined by PCR and Transmission Electron Microscopy (TEM). Human-mouse cell and XMRV contamination were also detected by PCR. Quantitative reverse transcription PCR and western blotting were used to compare the expression of genes and proteins among treated cells, non-treated infected cells, and uninfected cells. Results: Fourteen days after injection with cells, 4 of the 5 mice had ascites. Hepatocyte colonies extracted from the ascites of four mice were all mycoplasma-free. There was no cell cross-contamination or XMRV infection in treated cell cultures. Elimination of Mycoplasma resulted in partial or complete recovery in the expression of ALB, TF, and CYP3A4 genes as well as proteins. Proliferation of the treated cells was not significantly affected by this management. Conclusion: The method of elimination of Mycoplasma contamination in this study was validated and reproducible. Success was achieved in four of five cases examined. Compared to the previous studies, the duration of intraperitoneal passage in this study was significantly shorter.
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Affiliation(s)
- Jun Weng
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Yang Li
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Lei Cai
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Ting Li
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Gongze Peng
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Chaoyi Fu
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Xu Han
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Haiyan Li
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Zesheng Jiang
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Zhi Zhang
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
| | - Jiang Du
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Qing Peng
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou, China
| | - Yi Gao
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Artificial Organs and Tissue Engineering Centre of Guangdong Province, Guangzhou, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou, China
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10
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Corral-Vázquez C, Aguilar-Quesada R, Catalina P, Lucena-Aguilar G, Ligero G, Miranda B, Carrillo-Ávila JA. Cell lines authentication and mycoplasma detection as minimun quality control of cell lines in biobanking. Cell Tissue Bank 2017; 18:271-280. [PMID: 28255773 PMCID: PMC5429902 DOI: 10.1007/s10561-017-9617-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 02/23/2017] [Indexed: 11/24/2022]
Abstract
Establishment of continuous cell lines from human normal and tumor tissues is an extended and useful methodology for molecular characterization of cancer pathophysiology and drug development in research laboratories. The exchange of these cell lines between different labs is a common practice that can compromise assays reliability due to contamination with microorganism such as mycoplasma or cells from different flasks that compromise experiment reproducibility and reliability. Great proportions of cell lines are contaminated with mycoplasma and/or are replaced by cells derived for a different origin during processing or distribution process. The scientific community has underestimated this problem and thousand of research experiment has been done with cell lines that are incorrectly identified and wrong scientific conclusions have been published. Regular contamination and authentication tests are necessary in order to avoid negative consequences of widespread misidentified and contaminated cell lines. Cell banks generate, store and distribute cell lines for research, being mandatory a consistent and continuous quality program. Methods implementation for guaranteeing both, the absence of mycoplasma and authentication in the supplied cell lines, has been performed in the Andalusian Health System Biobank. Specifically, precise results were obtained using real time PCR detection for mycoplasma and 10 STRs identification by capillary electrophoresis for cell line authentication. Advantages and disadvantages of these protocols are discussed.
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Affiliation(s)
- C Corral-Vázquez
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - R Aguilar-Quesada
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - P Catalina
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - G Lucena-Aguilar
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - G Ligero
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - B Miranda
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain
| | - J A Carrillo-Ávila
- Andalusian Public Health System Biobank, Avenida Del Conocimiento S/N, 18016, Granada, Spain.
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11
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Feng H, Zhang Y, Liu K, Zhu Y, Yang Z, Zhang X, Liu Y. Intrinsic gene changes determine the successful establishment of stable renal cancer cell lines from tumor tissue. Int J Cancer 2017; 140:2526-2534. [DOI: 10.1002/ijc.30674] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 02/08/2017] [Accepted: 02/22/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Hailiang Feng
- Cell Resource Center, Department of Pathology; Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University; Beijing China
| | - Yu Zhang
- State Key Laboratory of Kidney Diseases, Department of Urology; Chinese People's Liberation Army Medical School, Chinese People's Liberation Army General Hospital; Beijing China
| | - Kan Liu
- State Key Laboratory of Kidney Diseases, Department of Urology; Chinese People's Liberation Army Medical School, Chinese People's Liberation Army General Hospital; Beijing China
| | - Yan Zhu
- Cell Resource Center, Department of Pathology; Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University; Beijing China
| | - Zhenli Yang
- Cell Resource Center, Department of Pathology; Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University; Beijing China
| | - Xu Zhang
- State Key Laboratory of Kidney Diseases, Department of Urology; Chinese People's Liberation Army Medical School, Chinese People's Liberation Army General Hospital; Beijing China
| | - Yuqin Liu
- Cell Resource Center, Department of Pathology; Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University; Beijing China
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12
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Alves SA, Ribeiro AR, Gemini-Piperni S, Silva RC, Saraiva AM, Leite PE, Perez G, Oliveira SM, Araujo JR, Archanjo BS, Rodrigues ME, Henriques M, Celis JP, Shokuhfar T, Borojevic R, Granjeiro JM, Rocha LA. TiO2nanotubes enriched with calcium, phosphorous and zinc: promising bio-selective functional surfaces for osseointegrated titanium implants. RSC Adv 2017. [DOI: 10.1039/c7ra08263k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TiO2nanotubes enriched with Ca, P, and Zn by reverse polarization anodization, are promising bio-selective functional structures for osseointegrated titanium implants.
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Templar A, Marsh D, Nesbeth DN. A synthetic biology standard for Chinese Hamster Ovary cell genome monitoring and contaminant detection by polymerase chain reaction. SPRINGERPLUS 2016; 5:1510. [PMID: 27652083 PMCID: PMC5016487 DOI: 10.1186/s40064-016-3074-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 08/15/2016] [Indexed: 02/02/2023]
Abstract
Background
Chinese Hamster Ovary (CHO) cells are the current industry standard for production of therapeutic monoclonal antibodies at commercial scales. Production optimisation in CHO cells hinges on analytical technologies such as the use of the polymerase chain reaction (PCR) to quantify genetic factors within the CHO genome and to detect the presence of contaminant organisms. PCR-based assays, whilst sensitive and accurate, are limited by (i) requiring lengthy sample preparation and (ii) a lack of standardisation. Results In this study we directly assess for the first time the effect of CHO cellular material on quantitative PCR (qPCR) and end-point PCR (e-pPCR) when used to measure and detect copies of a CHO genomic locus and a mycoplasma sequence. We also perform the first head-to-head comparison of the performance of a conventional qPCR method to that of the novel linear regression of efficiency (LRE) method when used to perform absolute qPCR on CHO-derived material. LRE qPCR features the putatively universal ‘CAL1’ standard. Conclusions We find that sample preparation is required for accurate quantitation of a genomic target locus, but mycoplasma DNA sequences can be detected in the presence of high concentrations of CHO cellular material. The LRE qPCR method matches performance of a conventional qPCR approach and as such we invite the synthetic biology community to adopt CAL1 as a synthetic biology calibration standard for qPCR.
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Affiliation(s)
- Alexander Templar
- Department of Biochemical Engineering, University College London, Bernard Katz Building, London, WC1E 6BT UK
| | - Douglas Marsh
- Department of Biochemical Engineering, University College London, Bernard Katz Building, London, WC1E 6BT UK
| | - Darren N Nesbeth
- Department of Biochemical Engineering, University College London, Bernard Katz Building, London, WC1E 6BT UK
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