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Hammad R, Alzubi J, Rhiel M, Chmielewski KO, Mosti L, Rositzka J, Heugel M, Lawrenz J, Pennucci V, Gläser B, Fischer J, Schambach A, Moritz T, Lachmann N, Cornu TI, Mussolino C, Schäfer R, Cathomen T. CRISPR-Cas12a for Highly Efficient and Marker-Free Targeted Integration in Human Pluripotent Stem Cells. Int J Mol Sci 2024; 25:985. [PMID: 38256061 PMCID: PMC10816062 DOI: 10.3390/ijms25020985] [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: 12/10/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
The CRISPR-Cas12a platform has attracted interest in the genome editing community because the prototypical Acidaminococcus Cas12a generates a staggered DNA double-strand break upon binding to an AT-rich protospacer-adjacent motif (PAM, 5'-TTTV). The broad application of the platform in primary human cells was enabled by the development of an engineered version of the natural Cas12a protein, called Cas12a Ultra. In this study, we confirmed that CRISPR-Cas12a Ultra ribonucleoprotein complexes enabled allelic gene disruption frequencies of over 90% at multiple target sites in human T cells, hematopoietic stem and progenitor cells (HSPCs), and induced pluripotent stem cells (iPSCs). In addition, we demonstrated, for the first time, the efficient knock-in potential of the platform in human iPSCs and achieved targeted integration of a GFP marker gene into the AAVS1 safe harbor site and a CSF2RA super-exon into CSF2RA in up to 90% of alleles without selection. Clonal analysis revealed bi-allelic integration in >50% of the screened iPSC clones without compromising their pluripotency and genomic integrity. Thus, in combination with the adeno-associated virus vector system, CRISPR-Cas12a Ultra provides a highly efficient genome editing platform for performing targeted knock-ins in human iPSCs.
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Affiliation(s)
- Ruba Hammad
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Freiburg iPS Core Facility, Medical Center—University of Freiburg, 79106 Freiburg, Germany
- PhD Program, Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Jamal Alzubi
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Manuel Rhiel
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Kay O. Chmielewski
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- PhD Program, Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Laura Mosti
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Julia Rositzka
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Marcel Heugel
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Jan Lawrenz
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Valentina Pennucci
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
| | - Birgitta Gläser
- Institute of Human Genetics, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (B.G.); (J.F.)
| | - Judith Fischer
- Institute of Human Genetics, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (B.G.); (J.F.)
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Axel Schambach
- Institute for Experimental Hematology, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (T.M.)
- REBIRTH Center for Regenerative and Translational Medicine, Hannover Medical School, 30625 Hannover, Germany;
| | - Thomas Moritz
- Institute for Experimental Hematology, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (T.M.)
- REBIRTH Center for Regenerative and Translational Medicine, Hannover Medical School, 30625 Hannover, Germany;
| | - Nico Lachmann
- REBIRTH Center for Regenerative and Translational Medicine, Hannover Medical School, 30625 Hannover, Germany;
- Department of Pediatric Pulmonology, Allergology and Neonatology, Hannover Medical School, 30625 Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease, German Center for Lung Research, Hannover Medical School, 30625 Hannover, Germany
- Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, 30625 Hannover, Germany
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), 30625 Hannover, Germany
| | - Tatjana I. Cornu
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Claudio Mussolino
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Richard Schäfer
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Freiburg iPS Core Facility, Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Toni Cathomen
- Institute for Transfusion Medicine and Gene Therapy, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (R.H.); (J.A.); (M.R.); (K.O.C.); (L.M.); (J.R.); (M.H.); (V.P.); (T.I.C.); (C.M.); (R.S.)
- Center for Chronic Immunodeficiency (CCI), Medical Center—University of Freiburg, 79106 Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
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Snoek L, Karampatsas K, Bijlsma MW, Henneke P, Jauneikaite E, Khan UB, Zadoks RN, Le Doare K. Meeting report: Towards better risk stratification, prevention and therapy of invasive GBS disease, ESPID research meeting May 2022. Vaccine 2023; 41:6137-6142. [PMID: 37699783 DOI: 10.1016/j.vaccine.2023.09.014] [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: 11/29/2022] [Revised: 08/14/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023]
Abstract
The European Society of Pediatric Infectious Diseases (ESPID) hosted the third Group B Streptococcus (GBS) Research Session in Athens on 11th May 2022, providing researchers and clinicians from around the world an opportunity to share and discuss recent advances in GBS pathophysiology, molecular and genetic epidemiology and how these new insights can help in improving prevention and control of early- and late-onset GBS disease. The meeting provided a state-of-the-art overview of the existing GBS prevention strategies and their limitations, and an opportunity to share the latest research findings. The first presentation provided an overview of current GBS prevention and treatment strategies. In the second presentation, the genomic and antimicrobial resistance profiles of invasive and colonizing GBS strains were presented. The third presentation explained the association of intrapartum antibiotic prophylaxis (IAP) with the development of late-onset disease (LOD) and the interplay of host innate immunity and GBS. The fourth presentation evaluated the role of genomics in understanding horizontal GBS transmission. The fifth presentation focused on the zoonotic links for certain GBS lineages and the last presentation described the protective role of breastmilk. Talks were followed with interactive discussions and concluded with recommendations on what is needed to further GBS clinical research; these included: (i) the development of better risk stratification methods by combining GBS virulence factors, serological biomarkers and clinical risk factors; (ii) further studies on the interplay of perinatal antimicrobials, disturbances in the development of host immunity and late-onset GBS disease; (iii) routine submission of GBS isolates to reference laboratories to help in detecting potential clusters by using genomic sequencing; (iv) collaboration in animal and human GBS studies to detect and prevent the emergence of new pathogenic sequence types; and (v) harnessing the plethora of immune factors in the breastmilk to develop adjunct therapies.
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Affiliation(s)
- Linde Snoek
- Department of Neurology, Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, Netherlands; Amsterdam Neuroscience, Neuroinfection and Inflammation, Amsterdam, Netherlands.
| | - Konstantinos Karampatsas
- Paediatric Infectious Diseases Research Group, Institute of Infection and Immunity, St. George's, University of London, London, United Kingdom
| | - Merijn W Bijlsma
- Amsterdam Neuroscience, Neuroinfection and Inflammation, Amsterdam, Netherlands; Department of Paediatrics, Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Philipp Henneke
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), University Medical Center and Faculty of Medicine, Freiburg, Germany; Institute for Infection Prevention and Control, University Medical Center and Faculty of Medicine, Freiburg, Germany
| | - Elita Jauneikaite
- Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, United Kingdom; NIHR Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, Hammersmith Hospital, London, United Kingdom
| | - Uzma B Khan
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom; Parasites and Microbes, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Ruth N Zadoks
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, Australia
| | - Kirsty Le Doare
- Paediatric Infectious Diseases Research Group, Institute of Infection and Immunity, St. George's, University of London, London, United Kingdom
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罗 凯, 谢 茂, 杨 为, 李 涛, 姜 春. [Effect of Pp2 cm Gene Silencing on Mouse Macrophage Resistance Against Staphylococcus aureus Infection via TLR Pathway]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2023; 54:941-946. [PMID: 37866950 PMCID: PMC10579066 DOI: 10.12182/20230960206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Indexed: 10/24/2023]
Abstract
Objective To investigate the effect of silencing protein phosphatase 2cm ( Pp2cm) gene on the expression of inflammatory factors in macrophages infected with Staphylococcus aureus ( S. aureus) and the mechanisms involved. Methods The effects of Pp2cm knockdown on inflammatory factors, proliferation, apoptosis, and Toll-like receptor (TLR) signaling were analyzed in RAW 264.7 cells, a murine macrophage cell line, transfected with adenovirus (Ad). The cells were divided into four groups, including Ad-Ctrl group, Ad- Pp2cm group, Ad-Ctrl+ S. aureus group and Ad- Pp2cm+ S. aureus group. Cell transfection was achieved by separately introducing control adenovirus (Ad-Ctrl) or adenovirus targeting the Pp2cm gene (Ad- Pp2cm) and inflammation or the absence of inflammation was induced by applying or not applying S. aureus. The expression of tumor necrosis factor-alpha ( TNF-α), interleukin-1β ( IL-1 β), TLR2, TLR4, Toll-like receptor adaptor protein ( Tirap) and myeloid differentiation factor 88 ( Myd88) was determined by real-time fluorescent quantitative polymerase chain reaction (RT-qPCR). PP2Cm protein expression was determined by Western blot. Cell proliferation was determined by cell counting kit-8 (CCK-8) assay and cell apoptosis was measured by flow cytometry. Results The expression of Pp2cmgene and PP2Cm protein was downregulated in the Ad- Pp2cm group when compared to the Ad-Ctrl group, with the diference showing statistical significance ( P<0.05). When compared to those of the Ad-Ctrl+ S. aureus group, macrophages in the Ad- Pp2cm+ S. aureus group showed significantly increase in the TNF- α and IL-1 β gene levels ( P<0.01). Furthermore, the Ad- Pp2cm group demonstrated elevated gene expression levels of TLR2, TLR4, Tirap and Myd88 in macrophages when compared to the Ad-Ctrl group, with the difference showing statistical significance ( P<0.05). There were no statistically significant differences in cell apoptosis and proliferation between the Ad-Ctrl and Ad- Pp2cm groups. Conclusions Silencing Pp2cm gene promotes the inflammatory response of macrophages to S. aureus infection. Moreover, the TLR pathway plays an important role in the inflammatory activation of macrophages.
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Affiliation(s)
- 凯腾 罗
- 四川大学华西医院 麻醉科 （成都 610041）Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院 麻醉转化医学国家地方联合工程研究中心 线粒体与代谢研究室 （成都 610041）Laboratory of Mitochondria and Metabolism, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 茂迪 谢
- 四川大学华西医院 麻醉科 （成都 610041）Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 为 杨
- 四川大学华西医院 麻醉科 （成都 610041）Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院 麻醉转化医学国家地方联合工程研究中心 线粒体与代谢研究室 （成都 610041）Laboratory of Mitochondria and Metabolism, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 涛 李
- 四川大学华西医院 麻醉科 （成都 610041）Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院 麻醉转化医学国家地方联合工程研究中心 线粒体与代谢研究室 （成都 610041）Laboratory of Mitochondria and Metabolism, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 春玲 姜
- 四川大学华西医院 麻醉科 （成都 610041）Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院 麻醉转化医学国家地方联合工程研究中心 线粒体与代谢研究室 （成都 610041）Laboratory of Mitochondria and Metabolism, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
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