LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 47

Search options

  1. Article ; Online: Optimization of Synthesis of Modified mRNA.

    Yoo, Jimeen / Zangi, Lior

    Methods in molecular biology (Clifton, N.J.)

    2022  Volume 2573, Page(s) 77–87

    Abstract: Modified mRNA (modRNA) is a safe and effective vector for gene-based therapies. Notably, the safety of modRNA has been validated through COVID-19 vaccines which incorporate modRNA technology to translate spike proteins. Alternative gene delivery methods ... ...

    Abstract Modified mRNA (modRNA) is a safe and effective vector for gene-based therapies. Notably, the safety of modRNA has been validated through COVID-19 vaccines which incorporate modRNA technology to translate spike proteins. Alternative gene delivery methods using plasmids, lentiviruses, adenoviruses, and adeno-associated viruses have suffered from key challenges such as genome integration, delayed and uncontrolled expression, and immunogenic responses. However, modRNA poses no risk of genome integration, has transient and rapid expression, and lacks an immunogenic response. Our lab utilizes modRNA-based therapies to promote cardiac regeneration following myocardial infarction and heart failure. We have also developed and refined an optimized and economical method for synthesis of modRNA. Here, we provide an updated methodology with improved translational efficiency for in vitro and in vivo application.
    MeSH term(s) COVID-19/therapy ; COVID-19 Vaccines ; Gene Transfer Techniques ; Genetic Therapy/methods ; Humans ; RNA, Messenger/genetics ; RNA, Messenger/metabolism
    Chemical Substances COVID-19 Vaccines ; RNA, Messenger
    Language English
    Publishing date 2022-08-30
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-2707-5_7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Lipid Nanoparticles for Organ-Specific mRNA Therapeutic Delivery.

    Żak, Magdalena M / Zangi, Lior

    Pharmaceutics

    2021  Volume 13, Issue 10

    Abstract: Advances in the using in vitro transcribed (IVT) modRNA in the past two decades, especially the tremendous recent success of mRNA vaccines against SARS-CoV-2, have brought increased attention to IVT mRNA technology. Despite its well-known use in ... ...

    Abstract Advances in the using in vitro transcribed (IVT) modRNA in the past two decades, especially the tremendous recent success of mRNA vaccines against SARS-CoV-2, have brought increased attention to IVT mRNA technology. Despite its well-known use in infectious disease vaccines, IVT modRNA technology is being investigated mainly in cancer immunotherapy and protein replacement therapy, with ongoing clinical trials in both areas. One of the main barriers to progressing mRNA therapeutics to the clinic is determining how to deliver mRNA to target cells and protect it from degradation. Over the years, many different vehicles have been developed to tackle this issue. Desirable vehicles must be safe, stable and preferably organ specific for successful mRNA delivery to clinically relevant cells and tissues. In this review we discuss various mRNA delivery platforms, with particular focus on attempts to create organ-specific vehicles for therapeutic mRNA delivery.
    Language English
    Publishing date 2021-10-13
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics13101675
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Modified mRNA as a Therapeutic Tool for the Heart.

    Kaur, Keerat / Zangi, Lior

    Cardiovascular drugs and therapy

    2020  Volume 34, Issue 6, Page(s) 871–880

    Abstract: Despite various clinical modalities available for patients, heart disease remains among the leading causes of mortality and morbidity worldwide. Genetic medicine, particularly mRNA, has broad potential as a therapeutic. More specifically, mRNA-based ... ...

    Abstract Despite various clinical modalities available for patients, heart disease remains among the leading causes of mortality and morbidity worldwide. Genetic medicine, particularly mRNA, has broad potential as a therapeutic. More specifically, mRNA-based protein delivery has been used in the fields of cancer and vaccination, but recent changes to the structural composition of mRNA have led the scientific community to swiftly embrace it as a new drug to deliver missing genes to injured myocardium and many other organs. Modified mRNA (modRNA)-based gene delivery features transient but potent protein translation and low immunogenicity, with minimal risk of insertional mutagenesis. In this review, we compared and listed the advantages of modRNA over traditional vectors for cardiac therapy, with particular focus on using modRNA therapy in cardiac repair. We present a comprehensive overview of modRNA's role in cardiomyocyte (CM) proliferation, cardiac vascularization, and prevention of cardiac apoptosis. We also emphasize recent advances in modRNA delivery strategies and discuss the challenges for its clinical translation.
    MeSH term(s) Animals ; Cell Proliferation ; Gene Transfer Techniques ; Genetic Therapy/adverse effects ; Heart Diseases/genetics ; Heart Diseases/metabolism ; Heart Diseases/physiopathology ; Heart Diseases/therapy ; Humans ; Myocytes, Cardiac/metabolism ; Myocytes, Cardiac/pathology ; RNA, Messenger/adverse effects ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; RNA, Messenger/therapeutic use ; Recovery of Function ; Regeneration ; Risk Factors ; Treatment Outcome
    Chemical Substances RNA, Messenger
    Keywords covid19
    Language English
    Publishing date 2020-08-21
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 639068-7
    ISSN 1573-7241 ; 0920-3206
    ISSN (online) 1573-7241
    ISSN 0920-3206
    DOI 10.1007/s10557-020-07051-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Lin28a cardiomyocyte-specific modified mRNA translation system induces cardiomyocyte cell division and cardiac repair.

    Magadum, Ajit / Sun, Jiacheng / Singh, Neha / Kurian, Ann Anu / Chepurko, Elena / Fargnoli, Anthony / Hajjar, Roger / Zhang, Jianyi / Zangi, Lior

    Journal of molecular and cellular cardiology

    2024  Volume 188, Page(s) 61–64

    Abstract: The mammalian heart has a limited regenerative capacity. Previous work suggested the heart can regenerate during development and immediately after birth by inducing cardiomyocyte (CM) proliferation; however, this capacity is lost seven days after birth. ... ...

    Abstract The mammalian heart has a limited regenerative capacity. Previous work suggested the heart can regenerate during development and immediately after birth by inducing cardiomyocyte (CM) proliferation; however, this capacity is lost seven days after birth. modRNA gene delivery, the same technology used successfully in the two mRNA vaccines against SARS-CoV-2, can prompt cardiac regeneration, cardiovascular regeneration and cardiac protection. We recently established a novel CM-specific modRNA translational system (SMRTs) that allows modRNA translation only in CMs. We demonstrated that this system delivers potent intracellular genes (e.g., cell cyclepromoting Pkm2), which are beneficial when expressed in one cell type (i.e., CMs) but not others (non-CMs). Here, we identify Lin28a as an important regulator of the CM cell cycle. We show that Lin28a is expressed in CMs during development and immediately after birth, but not during adulthood. We describe that specific delivery of Lin28a into CM, using CM SMRTs, enables CM cell division and proliferation. Further, we determine that this proliferation leads to cardiac repair and better outcome post MI. Moreover, we identify the molecular pathway of Lin28a in CMs. We also demonstrate that Lin28a suppress Let-7 which is vital for CM proliferation, partially due to its suppressive role on cMYC, HMGA2 and K-RAS.
    MeSH term(s) Animals ; Humans ; Adult ; Myocytes, Cardiac ; COVID-19 Vaccines ; Cardiac Surgical Procedures ; Cell Division ; Protein Biosynthesis ; Mammals
    Chemical Substances COVID-19 Vaccines
    Language English
    Publishing date 2024-01-30
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 80157-4
    ISSN 1095-8584 ; 0022-2828
    ISSN (online) 1095-8584
    ISSN 0022-2828
    DOI 10.1016/j.yjmcc.2024.01.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Modified mRNA Formulation and Stability for Cardiac and Skeletal Muscle Delivery.

    Żak, Magdalena M / Kaur, Keerat / Yoo, Jimeen / Kurian, Ann Anu / Adjmi, Matthew / Mainkar, Gayatri / Yoon, Seonghun / Zangi, Lior

    Pharmaceutics

    2023  Volume 15, Issue 9

    Abstract: Directly injecting naked or lipid nanoparticle (LNP)-encapsulated modified mRNA (modRNA) allows rapid and efficient protein expression. This non-viral technology has been used successfully in modRNA vaccines against SARS-CoV-2. The main challenges in ... ...

    Abstract Directly injecting naked or lipid nanoparticle (LNP)-encapsulated modified mRNA (modRNA) allows rapid and efficient protein expression. This non-viral technology has been used successfully in modRNA vaccines against SARS-CoV-2. The main challenges in using modRNA vaccines were the initial requirement for an ultra-cold storage to preserve their integrity and concerns regarding unwanted side effects from this new technology. Here, we showed that naked modRNA maintains its integrity when stored up to 7 days at 4 °C, and LNP-encapsulated modRNA for up to 7 days at room temperature. Naked modRNA is predominantly expressed at the site of injection when delivered into cardiac or skeletal muscle. In comparison, LNP-encapsulated modRNA granted superior protein expression but also additional protein expression beyond the cardiac or skeletal muscle injection site. To overcome this challenge, we developed a skeletal-muscle-specific modRNA translation system (skeletal muscle SMRTs) for LNP-encapsulated modRNA. This system allows controlled protein translation predominantly at the site of injection to prevent potentially detrimental leakage and expression in major organs. Our study revealed the potential of the SMRTs platform for controlled expression of mRNA payload delivered intramuscularly. To conclude, our SMRTs platform for LNP-encapsulated modRNA can provide safe, stable, efficient and targeted gene expression at the site of injection.
    Language English
    Publishing date 2023-08-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15092176
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: CCND2 Modified mRNA Activates Cell Cycle of Cardiomyocytes in Hearts With Myocardial Infarction in Mice and Pigs.

    Sun, Jiacheng / Wang, Lu / Matthews, Rachel C / Walcott, Gregory P / Lu, Yu-An / Wei, Yuhua / Zhou, Yang / Zangi, Lior / Zhang, Jianyi

    Circulation research

    2023  Volume 133, Issue 6, Page(s) 484–504

    Abstract: Background: Experiments in mammalian models of cardiac injury suggest that the cardiomyocyte-specific overexpression of CCND2 (cyclin D2, in humans) improves recovery from myocardial infarction (MI). The primary objective of this investigation was to ... ...

    Abstract Background: Experiments in mammalian models of cardiac injury suggest that the cardiomyocyte-specific overexpression of CCND2 (cyclin D2, in humans) improves recovery from myocardial infarction (MI). The primary objective of this investigation was to demonstrate that our specific modified mRNA translation system (SMRTs) can induce CCND2 expression in cardiomyocytes and replicate the benefits observed in other studies of cardiomyocyte-specific CCND2 overexpression for myocardial repair.
    Methods: The CCND2-cardiomyocyte-specific modified mRNA translation system (cardiomyocyte SMRTs) consists of 2 modRNA constructs: one codes for CCND2 and contains a binding site for L7Ae, and the other codes for L7Ae and contains recognition elements for the cardiomyocyte-specific microRNAs miR-1 and miR-208. Thus, L7Ae suppresses CCND2 translation in noncardiomyocytes but is itself suppressed by endogenous miR-1 and -208 in cardiomyocytes, thereby facilitating cardiomyocyte-specific CCND2 expression. Experiments were conducted in both mouse and pig models of MI, and control assessments were performed in animals treated with an SMRTs coding for the cardiomyocyte-specific expression of luciferase or green fluorescent protein (GFP), in animals treated with L7Ae modRNA alone or with the delivery vehicle, and in Sham-operated animals.
    Results: CCND2 was abundantly expressed in cultured, postmitotic cardiomyocytes 2 days after transfection with the CCND2-cardiomyocyte SMRTs, and the increase was accompanied by the upregulation of markers for cell-cycle activation and proliferation (eg, Ki67 and Aurora B kinase). When the GFP-cardiomyocyte SMRTs were intramyocardially injected into infarcted mouse hearts, the GFP signal was observed in cardiomyocytes but no other cell type. In both MI models, cardiomyocyte proliferation (on day 7 and day 3 after treatment administration in mice and pigs, respectively) was significantly greater, left-ventricular ejection fractions (days 7 and 28 in mice, days 10 and 28 in pigs) were significantly higher, and infarcts (day 28 in both species) were significantly smaller in animals treated with the CCND2-cardiomyocyte SMRTs than in any other group that underwent MI induction.
    Conclusions: Intramyocardial injections of the CCND2-cardiomyocyte SMRTs promoted cardiomyocyte proliferation, reduced infarct size, and improved cardiac performance in small and large mammalian hearts with MI.
    MeSH term(s) Animals ; Mice ; Cell Cycle ; Cyclin D2/genetics ; Disease Models, Animal ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Myocardial Infarction/metabolism ; Myocytes, Cardiac/metabolism ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; Swine
    Chemical Substances Cyclin D2 ; MicroRNAs ; Mirn208 microRNA, mouse ; RNA, Messenger
    Language English
    Publishing date 2023-08-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80100-8
    ISSN 1524-4571 ; 0009-7330 ; 0931-6876
    ISSN (online) 1524-4571
    ISSN 0009-7330 ; 0931-6876
    DOI 10.1161/CIRCRESAHA.123.322929
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Synthetic MicroRNAs Stimulate Cardiac Repair.

    Zangi, Lior / Hajjar, Roger J

    Circulation research

    2017  Volume 120, Issue 8, Page(s) 1222–1223

    MeSH term(s) Humans ; MicroRNAs ; Myocardial Infarction ; Myocytes, Cardiac
    Chemical Substances MicroRNAs
    Language English
    Publishing date 2017-04-13
    Publishing country United States
    Document type Editorial ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 80100-8
    ISSN 1524-4571 ; 0009-7330 ; 0931-6876
    ISSN (online) 1524-4571
    ISSN 0009-7330 ; 0931-6876
    DOI 10.1161/CIRCRESAHA.117.310863
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: mRNA-Based Protein Replacement Therapy for the Heart.

    Magadum, Ajit / Kaur, Keerat / Zangi, Lior

    Molecular therapy : the journal of the American Society of Gene Therapy

    2018  Volume 27, Issue 4, Page(s) 785–793

    Abstract: Myocardial infarction (MI) and heart failure (HF) are the leading causes of death in the United States and in most other industrialized nations. MI leads to a massive loss of cardiomyocytes (CMs), which are replaced with non-CM cells, leading to scarring ...

    Abstract Myocardial infarction (MI) and heart failure (HF) are the leading causes of death in the United States and in most other industrialized nations. MI leads to a massive loss of cardiomyocytes (CMs), which are replaced with non-CM cells, leading to scarring and, in most cases, HF. The adult mammalian heart has a low intrinsic regenerative capacity, mainly because of cell-cycle arrest in CMs. No effective treatment promoting heart regeneration is currently available. Recent efforts to use DNA-based or viral gene therapy approaches to induce cardiac regeneration post-MI or in HF conditions have encountered major challenges, mostly because of the poor and uncontrolled delivery of the introduced genes. Modified mRNA (modRNA) is a safe, non-immunogenic, efficient, transient, local, and controlled nucleic acid delivery system that can overcome the obstacles to DNA-based or viral approaches for cardiac gene delivery. We here review the use of modRNA in cardiac therapy, to induce cardioprotection and vascular or cardiac regeneration after MI. We discuss the current challenges in modRNA-based cardiac treatment, which will need to be overcome for the application of such treatment to ischemic heart disease.
    MeSH term(s) Animals ; Drug Delivery Systems ; Enzyme Replacement Therapy/methods ; Genetic Therapy/adverse effects ; Genetic Therapy/methods ; Heart Failure/therapy ; Humans ; Myocardial Infarction/therapy ; Myocytes, Cardiac/metabolism ; Nanoparticles ; RNA, Messenger/genetics ; Regeneration ; Transfection
    Chemical Substances RNA, Messenger
    Language English
    Publishing date 2018-12-06
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2010592-7
    ISSN 1525-0024 ; 1525-0016
    ISSN (online) 1525-0024
    ISSN 1525-0016
    DOI 10.1016/j.ymthe.2018.11.018
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: In Vitro Synthesis of Modified RNA for Cardiac Gene Therapy.

    Sultana, Nishat / Sharkar, Mohammad Tofael Kabir / Hadas, Yoav / Chepurko, Elena / Zangi, Lior

    Methods in molecular biology (Clifton, N.J.)

    2020  Volume 2158, Page(s) 281–294

    Abstract: Modified mRNA (modRNA) is a promising new gene therapy approach that has safely and effectively delivered genes into different tissues, including the heart. Current efforts to use DNA-based or viral gene therapy to induce cardiac regeneration ... ...

    Abstract Modified mRNA (modRNA) is a promising new gene therapy approach that has safely and effectively delivered genes into different tissues, including the heart. Current efforts to use DNA-based or viral gene therapy to induce cardiac regeneration postmyocardial infarction (MI) or in heart failure (HF) have encountered key challenges, e.g., genome integration and delayed and noncontrolled expression. By contrast, modRNA is a transient, safe, non-immunogenic, and controlled gene delivery method that is not integrated into the genome. For most therapeutic applications, especially in regenerative medicine, the ability to deliver genes to the heart transiently and with control is vital for achieving therapeutic effect. Additionally, modRNA synthesis is comparatively simple and inexpensive compared to other gene delivery methods (e.g., protein), though a simple, clear in vitro transcription (IVT) protocol for synthesizing modRNA is needed for it to be more widely used. Here, we describe a simple and improved step-by-step IVT protocol to synthesize modRNA for in vitro or in vivo applications.
    MeSH term(s) Animals ; Gene Transfer Techniques ; Genetic Therapy ; Mice ; Myocardial Infarction/genetics ; Myocardial Infarction/therapy ; Myocardium/metabolism ; RNA, Messenger/administration & dosage ; RNA, Messenger/chemistry ; RNA, Messenger/genetics ; Regenerative Medicine ; Transcription, Genetic
    Chemical Substances RNA, Messenger
    Language English
    Publishing date 2020-06-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-0668-1_21
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Specific Modified mRNA Translation System.

    Magadum, Ajit / Kurian, Ann Anu / Chepurko, Elena / Sassi, Yassine / Hajjar, Roger J / Zangi, Lior

    Circulation

    2020  Volume 142, Issue 25, Page(s) 2485–2488

    MeSH term(s) Animals ; Cells, Cultured ; Disease Models, Animal ; Gene Transfer Techniques ; Humans ; Interleukin-2 Receptor alpha Subunit/genetics ; Mice ; Mice, Transgenic ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Myocardial Infarction/genetics ; Myocardial Infarction/metabolism ; Myocardial Infarction/pathology ; Myocardial Infarction/therapy ; Myocytes, Cardiac/metabolism ; Myocytes, Cardiac/pathology ; Protein Biosynthesis ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; Rats ; Transfection
    Chemical Substances IL2RA protein, human ; Interleukin-2 Receptor alpha Subunit ; MicroRNAs ; Mirn1 microRNA, mouse ; Mirn199 microRNA, mouse ; Mirn208 microRNA, mouse ; RNA, Messenger
    Language English
    Publishing date 2020-12-21
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80099-5
    ISSN 1524-4539 ; 0009-7322 ; 0069-4193 ; 0065-8499
    ISSN (online) 1524-4539
    ISSN 0009-7322 ; 0069-4193 ; 0065-8499
    DOI 10.1161/CIRCULATIONAHA.120.047211
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top