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Cao J, Chen H, Song Q, Sun H, Yang H, Bai Y. Isolation and identification of primary cells: A comprehensive primary cell culture experiment for graduate students. BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION : A BIMONTHLY PUBLICATION OF THE INTERNATIONAL UNION OF BIOCHEMISTRY AND MOLECULAR BIOLOGY 2024. [PMID: 39016079 DOI: 10.1002/bmb.21852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 06/21/2024] [Accepted: 07/09/2024] [Indexed: 07/18/2024]
Abstract
Experimental teaching is an important part of postgraduate training in basic and clinical medicine. While primary cell isolation and identification are among the most important research techniques for medical graduate students, most graduate students do not understand and master these techniques before starting their research experience. In particular, many students lack training in this field, and high-quality teaching and learning materials are still very sparse. Here, we designed a practical experiment course for graduate students engaged in research. The target students usually have research projects involving primary cell culture in their future research, making the course highly applicable for the students. The lab exercise focused on the methods of primary cell isolation (including mechanical grinding method, explant culture method and enzymatic digestion method) and identification (including flow cytometry, immunofluorescence, and periodic acid-Schiff (PAS) staining). It aimed to help students master the conceptual, principle, technical, operation, and analytical skills related to primary cell culture and contributed to their foundation for future research. Students generally reflect that they have initially mastered the isolation and identification of primary cell culture as a result of the course. Student feedback also indicates significantly increased confidence in the practical application of primary cell culture in the future. Here, we provide our experience for others who may want to implement similar courses.
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Affiliation(s)
- Jixiang Cao
- Department of Cell Biology, Peking University Health Science Center, Beijing, China
| | - Hao Chen
- Department of Biochemistry and Biophysics, Peking University Health Science Center, Beijing, China
| | - Qing Song
- Department of Cell Biology, Peking University Health Science Center, Beijing, China
| | - Hong Sun
- Office of Scientific Research and Graduate Studies, Peking University Health Science Center, Beijing, China
| | - Hua Yang
- Department of Cell Biology, Peking University Health Science Center, Beijing, China
| | - Yun Bai
- Department of Cell Biology, Peking University Health Science Center, Beijing, China
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Salik D, El Kaderi Y, Hans C, Lefort A, Libert F, Smits G. Comparative study of keratinocyte primary culture methods from pediatric skin biopsies for
RNA
‐sequencing. Exp Dermatol 2022; 31:1741-1747. [DOI: 10.1111/exd.14652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/02/2022] [Accepted: 07/21/2022] [Indexed: 11/28/2022]
Affiliation(s)
- D. Salik
- Department of Dermatology, CHU Saint‐Pierre, CHU Brugmann and Hôpital Universitaire des Enfants Reine Fabiola Université Libre de Bruxelles Brussels Belgium
| | - Y. El Kaderi
- Department of Dermatology, CHU Saint‐Pierre, CHU Brugmann and Hôpital Universitaire des Enfants Reine Fabiola Université Libre de Bruxelles Brussels Belgium
| | - C. Hans
- Cytogenetics Laboratory, Hôpital Erasme, ULB Center of Human Genetics Université Libre de Bruxelles (ULB) Brussels Belgium
| | - A. Lefort
- I.R.I.B.H.M, Campus Erasme Université Libre de Bruxelles 808 Route de Lennik, B‐1070 Brussels Belgium
- Brussels Interuniversity Genomics High Throughput core (BRIGHTcore), Campus Erasme Université Libre de Bruxelles 808 Route de Lennik, B‐1070 Brussels Belgium
| | - F. Libert
- I.R.I.B.H.M, Campus Erasme Université Libre de Bruxelles 808 Route de Lennik, B‐1070 Brussels Belgium
- Brussels Interuniversity Genomics High Throughput core (BRIGHTcore), Campus Erasme Université Libre de Bruxelles 808 Route de Lennik, B‐1070 Brussels Belgium
| | - G. Smits
- Department of Genetics, Hôpital Erasme, ULB Center of Human Genetics Université Libre de Bruxelles (ULB) Brussels Belgium
- Department of Genetics, Hôpital Universitaire des Enfants Reine Fabiola, ULB Center of Human Genetics Université Libre de Bruxelles (ULB) Brussels Belgium
- Interuniversity Institute of Bioinformatics in Brussels Université Libre de Bruxelles Brussels Belgium
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Ortiz-Arrabal O, Chato-Astrain J, Crespo PV, Garzón I, Mesa-García MD, Alaminos M, Gómez-Llorente C. Biological Effects of Maslinic Acid on Human Epithelial Cells Used in Tissue Engineering. Front Bioeng Biotechnol 2022; 10:876734. [PMID: 35662841 PMCID: PMC9159156 DOI: 10.3389/fbioe.2022.876734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/08/2022] [Indexed: 12/04/2022] Open
Abstract
In the present work, we evaluated the potential of maslinic acid (MA) to improve currently available keratinocyte culture methods for use in skin tissue engineering. Results showed that MA can increase cell proliferation and WST-1 activity of human keratinocytes after 24, 48, and 72 h, especially at the concentration of 5 μg/ml, without affecting cell viability. This effect was associated to a significant increase of KI-67 protein expression and upregulation of several genes associated to cell proliferation (PCNA) and differentiation (cytokeratins, intercellular junctions and basement membrane related genes). When human keratinocytes were isolated from skin biopsies, we found that MA at the concentration of 5 μg/ml significantly increased the efficiency of the explant and the cell dissociation methods. These results revealed the positive effects of MA to optimize human keratinocyte culture protocols for use in skin tissue engineering.
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Affiliation(s)
- Olimpia Ortiz-Arrabal
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
- Doctoral Program in Biochemistry and Molecular Biology, University of Granada, Granada, Spain
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
| | - Pascual Vicente Crespo
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
| | - Ingrid Garzón
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
| | - María Dolores Mesa-García
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
- Department of Biochemistry and Molecular Biology II, School of Pharmacy, Campus Universitario de Cartuja, Granada, Spain
- Biomedical Research Center, Institute of Nutrition and Food Technology “José Mataix”, University of Granada, Granada, Spain
- *Correspondence: María Dolores Mesa-García, ; Miguel Alaminos,
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
- *Correspondence: María Dolores Mesa-García, ; Miguel Alaminos,
| | - Carolina Gómez-Llorente
- Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
- Department of Biochemistry and Molecular Biology II, School of Pharmacy, Campus Universitario de Cartuja, Granada, Spain
- Biomedical Research Center, Institute of Nutrition and Food Technology “José Mataix”, University of Granada, Granada, Spain
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Improvement of Cell Culture Methods for the Successful Generation of Human Keratinocyte Primary Cell Cultures Using EGF-Loaded Nanostructured Lipid Carriers. Biomedicines 2021; 9:biomedicines9111634. [PMID: 34829863 PMCID: PMC8615600 DOI: 10.3390/biomedicines9111634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/29/2021] [Accepted: 11/04/2021] [Indexed: 12/03/2022] Open
Abstract
Human skin keratinocyte primary cultures can be established from skin biopsies with culture media containing epithelial growth factor (EGF). Although current methods are efficient, optimization is required to accelerate the procedure and obtain these cultures in less time. In the present study, we evaluated the effect of novel formulations based on EGF-loaded nanostructured lipid carriers (NLC). First, biosafety of NLC containing recombinant human EGF (NLC-rhEGF) was verified in immortalized skin keratinocytes and cornea epithelial cells, and in two epithelial cancer cell lines, by quantifying free DNA released to the culture medium. Then we established primary cell cultures of human skin keratinocytes with basal culture media (BM) and BM supplemented with NLC-rhEGF, liquid EGF (L-rhEGF), or NLC alone (NLC-blank). The results showed that cells isolated by enzymatic digestion and cultured with or without a feeder layer had a similar growth rate regardless of the medium used. However, the explant technique showed higher efficiency when NLC-rhEGF culture medium was used, compared to BM, L-rhEGF, or NLC-blank. Gene expression analysis showed that NLC-rhEGF was able to increase EGFR gene expression, along with that of other genes related to cytokeratins, cell–cell junctions, and keratinocyte maturation and differentiation. In summary, these results support the use of NLC-rhEGF to improve the efficiency of explant-based methods in the efficient generation of human keratinocyte primary cell cultures for tissue engineering use.
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Kukreja BJ, Bhat KG, Kukreja P, Kumber VM, Balakrishnan R, Govila V. Isolation and immunohistochemical characterization of periodontal ligament stem cells: A preliminary study. J Indian Soc Periodontol 2021; 25:295-299. [PMID: 34393399 PMCID: PMC8336774 DOI: 10.4103/jisp.jisp_442_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 12/12/2020] [Accepted: 12/15/2020] [Indexed: 01/04/2023] Open
Abstract
Context: It is a known fact that periodontal tissue regeneration can be achieved by the use of periodontal ligament stem cells (PDLSCs). Current mainstay of periodontal treatment is focusing on stem cell tissue engineering as an effective therapy, making it important to isolate PDLSCs from periodontal tissues. Aims: The present research endeavor was undertaken to elucidate a technique for isolating PDLSCs for in vivo reconstructing the natural PDL tissue. Settings and Design: The study design involves In vitro prospective study. Materials and Methods: Premolar teeth were extracted from 12 patients who were under orthodontic treatment. PDL cells were scraped from their roots. Using 10 ml of Dulbecco's modified Eagle's medium with pH 7.2, the specimens of the periodontal tissue were transferred to laboratory where cell culture was done. Isolated stem cells were grown on 24-well microtiter plates-containing cover slips. They were incubated overnight at approximately 37°C in 95% air and 5% humidification. Anti-CD 45, CD73, CD90, CD105, and CD146 antibodies were used. After staining, cells were observed under phase-contrast microscopy and in inverted microscope. Results: The cells showed a marked growth and 90% confluence at day 6. Cells presented thin and long fibroblastic spindle morphology. Isolated PDLSCs showed colony-forming ability at the 14th day after seeding. Immunohistochemical staining of PDLSCs showed positive uptake for CD146, CD90, CD73, CD105, and negative uptake for CD45. Conclusions: The human PDLSCs can be clearly isolated and characterized by using CD90, CD73, CD146, and CD105 markers of stem cells.
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Affiliation(s)
- Bhavna Jha Kukreja
- Department of Periodontology, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Kishore Gajanan Bhat
- Department of Microbiology, Maratha Mandal's Nathajirao G. Halgekar Institute of Dental Sciences and Research Centre, Belagavi, Karnataka, India
| | - Pankaj Kukreja
- Department of Biomedical Dental Sciences, Faculty of Dentistry, Al Baha University, Al Baha, Kingdom of Saudi Arabia
| | - Vijay Mahadev Kumber
- Maratha Mandal's Nathajirao G. Halgekar Institute of Dental Sciences and Research Centre, Maratha Mandal's Central Research Laboratory, Belagavi, Karnataka, India
| | - Rajkumar Balakrishnan
- Department of Conservative Dentistry and Endodontics, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Vivek Govila
- Department of Periodontology, Saraswati Dental College and Hospital, Lucknow, Uttar Pradesh, India
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Ionescu AM, Chato-Astrain J, Cardona JDLC, Campos F, Pérez MM, Alaminos M, Garzón I. Evaluation of the optical and biomechanical properties of bioengineered human skin generated with fibrin-agarose biomaterials. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:1-16. [PMID: 32383372 PMCID: PMC7203517 DOI: 10.1117/1.jbo.25.5.055002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/24/2020] [Indexed: 05/21/2023]
Abstract
SIGNIFICANCE Recent generation of bioengineered human skin allowed the efficient treatment of patients with severe skin defects. However, the optical and biomechanical properties of these models are not known. AIM Three models of bioengineered human skin based on fibrin-agarose biomaterials (acellular, dermal skin substitutes, and complete dermoepidermal skin substitutes) were generated and analyzed. APPROACH Optical and biomechanical properties of these artificial human skin substitutes were investigated using the inverse adding-doubling method and tensile tests, respectively. RESULTS The analysis of the optical properties revealed that the model that most resembled the optical behavior of the native human skin in terms of absorption and scattering properties was the dermoepidermal human skin substitutes after 7 to 14 days in culture. The time-course evaluation of the biomechanical parameters showed that the dermoepidermal substitutes displayed significant higher values than acellular and dermal skin substitutes for all parameters analyzed and did not differ from the control skin for traction deformation, stress, and strain at fracture break. CONCLUSIONS We demonstrate the crucial role of the cells from a physical point of view, confirming that a bioengineered dermoepidermal human skin substitute based on fibrin-agarose biomaterials is able to fulfill the minimal requirements for skin transplants for future clinical use at early stages of in vitro development.
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Affiliation(s)
- Ana Maria Ionescu
- University of Granada, Laboratory of Biomaterials Optics, Department of Optics, Faculty of Sciences, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Jesus Chato-Astrain
- University of Granada, Department of Histology, Faculty of Medicine, Tissue Engineering Group, Granada, Spain
| | - Juan de la Cruz Cardona
- University of Granada, Laboratory of Biomaterials Optics, Department of Optics, Faculty of Sciences, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Fernando Campos
- University of Granada, Department of Histology, Faculty of Medicine, Tissue Engineering Group, Granada, Spain
| | - Maria M. Pérez
- University of Granada, Laboratory of Biomaterials Optics, Department of Optics, Faculty of Sciences, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Miguel Alaminos
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- University of Granada, Department of Histology, Faculty of Medicine, Tissue Engineering Group, Granada, Spain
| | - Ingrid Garzón
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- University of Granada, Department of Histology, Faculty of Medicine, Tissue Engineering Group, Granada, Spain
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