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Qian C, Wang Q, Qiao Y, Xu Z, Zhang L, Xiao H, Lin Z, Wu M, Xia W, Yang H, Bai J, Geng D. Arachidonic acid in aging: New roles for old players. J Adv Res 2024:S2090-1232(24)00180-2. [PMID: 38710468 DOI: 10.1016/j.jare.2024.05.003] [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: 02/06/2024] [Revised: 04/26/2024] [Accepted: 05/03/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Arachidonic acid (AA), one of the most ubiquitous polyunsaturated fatty acids (PUFAs), provides fluidity to mammalian cell membranes. It is derived from linoleic acid (LA) and can be transformed into various bioactive metabolites, including prostaglandins (PGs), thromboxanes (TXs), lipoxins (LXs), hydroxy-eicosatetraenoic acids (HETEs), leukotrienes (LTs), and epoxyeicosatrienoic acids (EETs), by different pathways. All these processes are involved in AA metabolism. Currently, in the context of an increasingly visible aging world population, several scholars have revealed the essential role of AA metabolism in osteoporosis, chronic obstructive pulmonary disease, and many other aging diseases. AIM OF REVIEW Although there are some reviews describing the role of AA in some specific diseases, there seems to be no or little information on the role of AA metabolism in aging tissues or organs. This review scrutinizes and highlights the role of AA metabolism in aging and provides a new idea for strategies for treating aging-related diseases. KEY SCIENTIFIC CONCEPTS OF REVIEW As a member of lipid metabolism, AA metabolism regulates the important lipids that interfere with the aging in several ways. We present a comprehensivereviewofthe role ofAA metabolism in aging, with the aim of relieving the extreme suffering of families and the heavy economic burden on society caused by age-related diseases. We also collected and summarized data on anti-aging therapies associated with AA metabolism, with the expectation of identifying a novel and efficient way to protect against aging.
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Affiliation(s)
- Chen Qian
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Qing Wang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Yusen Qiao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Ze Xu
- Department of Orthopedics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, 17 Lujiang Road, Hefei, Anhui 230031, PR China
| | - Linlin Zhang
- Department of Orthopedics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, 17 Lujiang Road, Hefei, Anhui 230031, PR China
| | - Haixiang Xiao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Zhixiang Lin
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Mingzhou Wu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Wenyu Xia
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China
| | - Huilin Yang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China.
| | - Jiaxiang Bai
- Department of Orthopedics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, 17 Lujiang Road, Hefei, Anhui 230031, PR China.
| | - Dechun Geng
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China.
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Behl T, Kumar A, Vishakha, Sehgal A, Singh S, Sharma N, Yadav S, Rashid S, Ali N, Ahmed AS, Vargas-De-La-Cruz C, Bungau SG, Khan H. Understanding the mechanistic pathways and clinical aspects associated with protein and gene based biomarkers in breast cancer. Int J Biol Macromol 2023; 253:126595. [PMID: 37648139 DOI: 10.1016/j.ijbiomac.2023.126595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 08/22/2023] [Accepted: 08/27/2023] [Indexed: 09/01/2023]
Abstract
Cancer is one of the most widespread and severe diseases with a huge mortality rate. In recent years, the second-leading mortality rate of any cancer globally has been breast cancer, which is one of the most common and deadly cancers found in women. Detecting breast cancer in its initial stages simplifies treatment, decreases death risk, and recovers survival rates for patients. The death rate for breast cancer has risen to 0.024 % in some regions. Sensitive and accurate technologies are required for the preclinical detection of BC at an initial stage. Biomarkers play a very crucial role in the early identification as well as diagnosis of women with breast cancer. Currently, a wide variety of cancer biomarkers have been discovered for the diagnosis of cancer. For the identification of these biomarkers from serum or other body fluids at physiological amounts, many detection methods have been developed. In the case of breast cancer, biomarkers are especially helpful in discovering those who are more likely to develop the disease, determining prognosis at the time of initial diagnosis and choosing the best systemic therapy. In this study we have compiled various clinical aspects and signaling pathways associated with protein-based biomarkers and gene-based biomarkers.
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Affiliation(s)
- Tapan Behl
- School of Health Sciences and Technology, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand, India
| | - Ankush Kumar
- Institute of Pharmaceutical Sciences, IET Bhaddal Technical Campus, Ropar 140108, Punjab, India
| | - Vishakha
- Institute of Pharmaceutical Sciences, IET Bhaddal Technical Campus, Ropar 140108, Punjab, India
| | - Aayush Sehgal
- GHG Khalsa College of Pharmacy, Gurusar Sadhar, 141104 Ludhiana, Punjab, India
| | - Sukhbir Singh
- Department of Pharmaceutics, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana Ambala 133203, Haryana, India
| | - Neelam Sharma
- Department of Pharmaceutics, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana Ambala 133203, Haryana, India
| | - Shivam Yadav
- School of Pharmacy, Babu Banarasi Das University, Lucknow 226028, Uttar Pradesh, India
| | - Summya Rashid
- Department of Pharmacology and Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia.
| | - Nemat Ali
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadah 11451, Saudi Arabia
| | - Amira Saber Ahmed
- Hormones Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza 12622, Egypt
| | - Celia Vargas-De-La-Cruz
- Department of Pharmacology, Bromatology and Toxicology, Faculty of Pharmacy and Biochemistry, Universidad Nacional Mayor de San Marcos, Lima 150001, Peru; E-Health Research Center, Universidad de Ciencias y Humanidades, Lima 15001, Peru
| | - Simona Gabriela Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea 410087, Romania; Doctoral School of Biomedical Sciences, University of Oradea, Oradea 410087, Romania
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan.
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3
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Tayanloo-Beik A, Hamidpour SK, Nikkhah A, Arjmand R, Mafi AR, Rezaei-Tavirani M, Larijani B, Gilany K, Arjmand B. DNA Damage Responses, the Trump Card of Stem Cells in the Survival Game. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023. [PMID: 37923882 DOI: 10.1007/5584_2023_791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2023]
Abstract
Stem cells, as a group of undifferentiated cells, are enriched with self-renewal and high proliferative capacity, which have attracted the attention of many researchers as a promising approach in the treatment of many diseases over the past years. However, from the cellular and molecular point of view, the DNA repair system is one of the biggest challenges in achieving therapeutic goals through stem cell technology. DNA repair mechanisms are an advantage for stem cells that are constantly multiplying to deal with various types of DNA damage. However, this mechanism can be considered a trump card in the game of cell survival and treatment resistance in cancer stem cells, which can hinder the curability of various types of cancer. Therefore, getting a deep insight into the DNA repair system can bring researchers one step closer to achieving major therapeutic goals. The remarkable thing about the DNA repair system is that this system is not only under the control of genetic factors, but also under the control of epigenetic factors. Therefore, it is necessary to investigate the role of the DNA repair system in maintaining the survival of cancer stem cells from both aspects.
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Affiliation(s)
- Akram Tayanloo-Beik
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Amirabbas Nikkhah
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Rasta Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Rezazadeh Mafi
- Department of Radiation Oncology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical sciences, Tehran, Iran
| | - Kambiz Gilany
- Integrative Oncology Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
- Reproductive Immunology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Babak Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Bariani MV, Cui YH, Ali M, Bai T, Grimm SL, Coarfa C, Walker CL, He YY, Yang Q, Al-Hendy A. TGFβ signaling links early life endocrine-disrupting chemicals exposure to suppression of nucleotide excision repair in rat myometrial stem cells. Cell Mol Life Sci 2023; 80:288. [PMID: 37689587 PMCID: PMC10492698 DOI: 10.1007/s00018-023-04928-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/25/2023] [Accepted: 08/18/2023] [Indexed: 09/11/2023]
Abstract
Environmental exposure to endocrine-disrupting chemicals (EDCs) is linked to the development of uterine fibroids (UFs) in women. UFs, non-cancerous tumors, are thought to originate from abnormal myometrial stem cells (MMSCs). Defective DNA repair capacity may contribute to the emergence of mutations that promote tumor growth. The multifunctional cytokine TGFβ1 is associated with UF progression and DNA damage repair pathways. To investigate the impact of EDC exposure on TGFβ1 and nucleotide excision repair (NER) pathways, we isolated MMSCs from 5-month-old Eker rats exposed neonatally to diethylstilbestrol (DES), an EDC, or to vehicle (VEH). EDC-MMSCs exhibited overactivated TGFβ1 signaling and reduced mRNA and protein levels of NER pathway components compared to VEH-MMSCs. EDC-MMSCs also demonstrated impaired NER capacity. Exposing VEH-MMSCs to TGFβ1 decreased NER capacity while inhibiting TGFβ signaling in EDC-MMSCs restored it. RNA-seq analysis and further validation revealed decreased expression of Uvrag, a tumor suppressor gene involved in DNA damage recognition, in VEH-MMSCs treated with TGFβ1, but increased expression in EDC-MMSCs after TGFβ signaling inhibition. Overall, we demonstrated that the overactivation of the TGFβ pathway links early life exposure to EDCs with impaired NER capacity, which would lead to increased genetic instability, arise of mutations, and fibroid tumorigenesis. We demonstrated that the overactivation of the TGFβ pathway links early life exposure to EDCs with impaired NER capacity, which would lead to increased fibroid incidence.
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Affiliation(s)
| | - Yan-Hong Cui
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL, USA
| | - Mohamed Ali
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA
| | - Tao Bai
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Sandra L Grimm
- Molecular and Cellular Biology Department, Baylor College of Medicine, Houston, TX, USA
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Center for Precision and Environmental Health, Baylor College of Medicine, Houston, TX, USA
| | - Cristian Coarfa
- Molecular and Cellular Biology Department, Baylor College of Medicine, Houston, TX, USA
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Center for Precision and Environmental Health, Baylor College of Medicine, Houston, TX, USA
| | - Cheryl L Walker
- Center for Precision and Environmental Health, Baylor College of Medicine, Houston, TX, USA
| | - Yu-Ying He
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL, USA
| | - Qiwei Yang
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA
| | - Ayman Al-Hendy
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA.
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5
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Jiménez Peinado P, Urbach A. From Youthful Vigor to Aging Decline: Unravelling the Intrinsic and Extrinsic Determinants of Hippocampal Neural Stem Cell Aging. Cells 2023; 12:2086. [PMID: 37626896 PMCID: PMC10453598 DOI: 10.3390/cells12162086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
Since Joseph Altman published his pioneering work demonstrating neurogenesis in the hippocampus of adult rats, the number of publications in this field increased exponentially. Today, we know that the adult hippocampus harbors a pool of adult neural stem cells (NSCs) that are the source of life-long neurogenesis and plasticity. The functions of these NSCs are regulated by extrinsic cues arising from neighboring cells and the systemic environment. However, this tight regulation is subject to imbalance with age, resulting in a decline in adult NSCs and neurogenesis, which contributes to the progressive deterioration of hippocampus-related cognitive functions. Despite extensive investigation, the mechanisms underlying this age-related decline in neurogenesis are only incompletely understood, but appear to include an increase in NSC quiescence, changes in differentiation patterns, and NSC exhaustion. In this review, we summarize recent work that has improved our knowledge of hippocampal NSC aging, focusing on NSC-intrinsic mechanisms as well as cellular and molecular changes in the niche and systemic environment that might be involved in the age-related decline in NSC functions. Additionally, we identify future directions that may advance our understanding of NSC aging and the concomitant loss of hippocampal neurogenesis and plasticity.
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Affiliation(s)
| | - Anja Urbach
- Department of Neurology, Jena University Hospital, 07747 Jena, Germany
- Jena Center for Healthy Aging, Jena University Hospital, 07747 Jena, Germany
- Aging Research Center Jena, Leibniz Institute on Aging, 07745 Jena, Germany
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6
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Bariani MV, Cui YH, Ali M, Bai T, Grimm SL, Coarfa C, Walker CL, He YY, Yang Q, Al-Hendy A. TGFβ signaling links early-life endocrine-disrupting chemicals exposure to suppression of nucleotide excision repair in rat myometrial stem cells. RESEARCH SQUARE 2023:rs.3.rs-3001855. [PMID: 37333266 PMCID: PMC10274956 DOI: 10.21203/rs.3.rs-3001855/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Environmental exposure to endocrine-disrupting chemicals (EDCs) is linked to the development of uterine fibroids (UFs) in women. UFs, non-cancerous tumors, are thought to originate from abnormal myometrial stem cells (MMSCs). Defective DNA repair capacity may contribute to the emergence of mutations that promote tumor growth. The multifunctional cytokine TGFβ1 is associated with UF progression and DNA damage repair pathways. To investigate the impact of EDC exposure on TGFβ1 and nucleotide excision repair (NER) pathways, we isolated MMSCs from 5-months old Eker rats exposed neonatally to Diethylstilbestrol (DES), an EDC, or to vehicle (VEH). EDC-MMSCs exhibited overactivated TGFβ1 signaling and reduced mRNA and protein levels of NER pathway components compared to VEH-MMSCs. EDC-MMSCs also demonstrated impaired NER capacity. Exposing VEH-MMSCs to TGFβ1 decreased NER capacity while inhibiting TGFβ signaling in EDC-MMSCs restored it. RNA-seq analysis and further validation revealed decreased expression of Uvrag, a tumor suppressor gene involved in DNA damage recognition, in VEH-MMSCs treated with TGFβ1, but increased expression in EDC-MMSCs after TGFβ signaling inhibition. Overall, we demonstrated that the overactivation of the TGFβ pathway links early-life exposure to EDCs with impaired NER capacity, which would lead to increased genetic instability, arise of mutations, and fibroid tumorigenesis. We demonstrated that the overactivation of the TGFβ pathway links early-life exposure to EDCs with impaired NER capacity, which would lead to increased fibroid incidence.
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Affiliation(s)
| | | | - Mohamed Ali
- University of Chicago Department of Obstetrics and Gynecology
| | - Tao Bai
- University of Chicago Department of Obstetrics and Gynecology
| | | | | | | | - Yu-Ying He
- University of Chicago Department of Medicine
| | - Qiwei Yang
- University of Chicago Department of Obstetrics and Gynecology
| | - Ayman Al-Hendy
- University of Chicago Department of Obstetrics and Gynecology
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7
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Park JC, Kim YJ, Han JH, Kim D, Park MJ, Kim J, Jang HK, Bae S, Cha HJ. MutSα and MutSβ as size-dependent cellular determinants for prime editing in human embryonic stem cells. MOLECULAR THERAPY. NUCLEIC ACIDS 2023; 32:914-922. [PMCID: PMC10280094 DOI: 10.1016/j.omtn.2023.05.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 05/10/2023] [Indexed: 06/22/2023]
Abstract
Precise genome editing in human pluripotent stem cells (hPSCs) has potential applications in isogenic disease modeling and ex vivo stem cell therapy, necessitating diverse genome editing tools. However, unlike differentiated somatic cells, hPSCs have unique cellular properties that maintain genome integrity, which largely determine the overall efficiency of an editing tool. Considering the high demand for prime editors (PEs), it is imperative to characterize the key molecular determinants of PE outcomes in hPSCs. Through homozygous knockout (KO) of MMR pathway key proteins MSH2, MSH3, and MSH6, we reveal that MutSα and MutSβ determine PE efficiency in an editing size-dependent manner. Notably, MSH2 perturbation disrupted both MutSα and MutSβ complexes, dramatically escalating PE efficiency from base mispair to 10 bases, up to 50 folds. Similarly, impaired MutSα by MSH6 KO improved editing efficiency from single to three base pairs, while defective MutSβ by MSH3 KO heightened efficiency from three to 10 base pairs. Thus, the size-dependent effect of MutSα and MutSβ on prime editing implies that MMR is a vital PE efficiency determinant in hPSCs and highlights the distinct roles of MutSα and MutSβ in its outcome.
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Affiliation(s)
- Ju-Chan Park
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Yun-Jeong Kim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jun Hee Han
- Department of Chemistry, Hanyang University, Seoul, Republic of Korea
| | - Dayeon Kim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Mihn Jeong Park
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jumee Kim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hyeon-Ki Jang
- Division of Chemical Engineering and Bioengineering, College of Art Culture and Engineering, Kangwon National University, Chuncheon, South Korea
| | - Sangsu Bae
- College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Hyuk-Jin Cha
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
- Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
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The landscape of aging. SCIENCE CHINA LIFE SCIENCES 2022; 65:2354-2454. [PMID: 36066811 PMCID: PMC9446657 DOI: 10.1007/s11427-022-2161-3] [Citation(s) in RCA: 91] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 07/05/2022] [Indexed: 02/07/2023]
Abstract
Aging is characterized by a progressive deterioration of physiological integrity, leading to impaired functional ability and ultimately increased susceptibility to death. It is a major risk factor for chronic human diseases, including cardiovascular disease, diabetes, neurological degeneration, and cancer. Therefore, the growing emphasis on “healthy aging” raises a series of important questions in life and social sciences. In recent years, there has been unprecedented progress in aging research, particularly the discovery that the rate of aging is at least partly controlled by evolutionarily conserved genetic pathways and biological processes. In an attempt to bring full-fledged understanding to both the aging process and age-associated diseases, we review the descriptive, conceptual, and interventive aspects of the landscape of aging composed of a number of layers at the cellular, tissue, organ, organ system, and organismal levels.
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9
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Park JC, Jang HK, Kim J, Han JH, Jung Y, Kim K, Bae S, Cha HJ. High expression of uracil DNA glycosylase determines C to T substitution in human pluripotent stem cells. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 27:175-183. [PMID: 34976436 PMCID: PMC8688811 DOI: 10.1016/j.omtn.2021.11.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 11/28/2021] [Indexed: 10/29/2022]
Abstract
Precise genome editing of human pluripotent stem cells (hPSCs) is crucial not only for basic science but also for biomedical applications such as ex vivo stem cell therapy and genetic disease modeling. However, hPSCs have unique cellular properties compared to somatic cells. For instance, hPSCs are extremely susceptible to DNA damage, and therefore Cas9-mediated DNA double-strand breaks (DSB) induce p53-dependent cell death, resulting in low Cas9 editing efficiency. Unlike Cas9 nucleases, base editors including cytosine base editor (CBE) and adenine base editor (ABE) can efficiently substitute single nucleotides without generating DSBs at target sites. Here, we found that the editing efficiency of CBE was significantly lower than that of ABE in human embryonic stem cells (hESCs), which are associated with high expression of DNA glycosylases, the key component of the base excision repair pathway. Sequential depletion of DNA glycosylases revealed that high expression of uracil DNA glycosylase (UNG) not only resulted in low editing efficiency but also affected CBE product purity (i.e., C to T) in hESCs. Therefore, additional suppression of UNG via transient knockdown would also improve C to T base substitutions in hESCs. These data suggest that the unique cellular characteristics of hPSCs could determine the efficiency of precise genome editing.
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Affiliation(s)
- Ju-Chan Park
- College of Pharmacy, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hyeon-Ki Jang
- Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic of Korea
| | - Jumee Kim
- College of Pharmacy, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jun Hee Han
- Department of Chemistry, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Youngri Jung
- Department of Chemistry, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Keuntae Kim
- College of Pharmacy, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sangsu Bae
- Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic of Korea
- Department of Chemistry, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Hyuk-Jin Cha
- College of Pharmacy, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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10
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Grasselli C, Bombelli S, Eriani S, Domenici G, Galluccio R, Tropeano C, De Marco S, Bolognesi MM, Torsello B, Bianchi C, Antolini L, Rossi F, Mazzola P, Leoni V, Bellelli G, Perego RA. DNA damage in circulating hematopoietic progenitor stem cells as promising biological sensor of frailty. J Gerontol A Biol Sci Med Sci 2022; 77:1279-1286. [PMID: 35137086 PMCID: PMC9255693 DOI: 10.1093/gerona/glac034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 12/02/2022] Open
Abstract
Frailty is an age-related syndrome that exposes individuals to increased vulnerability. Although it is potentially reversible, in most cases it leads to negative outcomes, including mortality. The different methods proposed identify frailty after the onset of clinical manifestations. An early diagnosis might make it possible to manage the frailty progression better. The frailty pathophysiology is still unclear although mechanisms, in particular, those linked to inflammation and immunosenescence, have been investigated. A common feature of several clinical aspects involved in senescent organisms is the increase of oxidative stress, described as one of the major causes of deoxyribonucleic acid (DNA) damage accumulation in aged cells including the adult stem cell compartment. Likely, this accumulation is implicated in frailty status. The oxidative status of our frail, pre-frail, and non-frail population was characterized. In addition, the DNA damage in hematopoietic cells was evidenced by analyzing the peripheral blood mononuclear cell and their T lymphocyte, monocyte, circulating hematopoietic progenitor stem cell (cHPSC) subpopulations. The phosphorylation of C-terminal of histone H2AX at amino acid Ser 139 (γ-H2AX), which occurs at the DNA double-strand break focus, was evaluated. In our frail population, increased oxidative stress and a high level of DNA damage in cHPSC were found. This study may have potential implications because the increment of DNA damage in cHPSC could be suggestive of an organism impairment preceding the evident frailty. In addition, it may open the possibility for attenuation of frailty progression throughout specific drugs acting on preventing DNA damage or removing damaged cells
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Affiliation(s)
- Chiara Grasselli
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Silvia Bombelli
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Stefano Eriani
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Giulia Domenici
- Acute Geriatric Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Riccardo Galluccio
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Acute Geriatric Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Chiara Tropeano
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Laboratory of Clinical Chemistry, Hospital of Desio, ASST-Brianza, Desio, Italy
| | - Sofia De Marco
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | | | - Barbara Torsello
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Cristina Bianchi
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Laura Antolini
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Fabio Rossi
- Immunotransfusional Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Paolo Mazzola
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Acute Geriatric Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Valerio Leoni
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Laboratory of Clinical Chemistry, Hospital of Desio, ASST-Brianza, Desio, Italy
| | - Giuseppe Bellelli
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Acute Geriatric Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Roberto A Perego
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
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11
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Hu M, Xing L, Zhang L, Liu F, Wang S, Xie Y, Wang J, Jiang H, Guo J, Li X, Wang J, Sui L, Li C, Liu D, Liu Z. NAP1L2 drives mesenchymal stem cell senescence and suppresses osteogenic differentiation. Aging Cell 2022; 21:e13551. [PMID: 35032339 PMCID: PMC8844120 DOI: 10.1111/acel.13551] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/08/2021] [Accepted: 12/31/2021] [Indexed: 12/19/2022] Open
Abstract
Senescence of bone marrow mesenchymal stem cells (BMSCs) impairs stemness and osteogenic differentiation, but the key regulators for senescence and the related osteogenesis are not well defined. Herein, we screened the gene expression profiles of human BMSCs from young and old donors and identified that elevation of the nucleosome assembly protein 1‐like 2 (NAP1L2) expression was correlated with BMSC senescence and impaired osteogenesis. Elevated NAP1L2 expression was observed in replicative cell senescence and induced cell senescence in vitro, and in age‐related senescent human and mouse BMSCs in vivo, concomitant with significantly augmented chromatin accessibility detected by ATAC‐seq. Loss‐ and gain‐of‐functions of NAP1L2 affected activation of NF‐κB pathway, status of histone 3 lysine 14 acetylation (H3K14ac), and chromatin accessibility on osteogenic genes in BMSCs. Mechanistic studies revealed that NAP1L2, a histone chaperone, recruited SIRT1 to deacetylate H3K14ac on promoters of osteogenic genes such as Runx2, Sp7, and Bglap and suppressed the osteogenic differentiation of BMSCs. Importantly, molecular docking analysis showed a possible bond between NAP1L2 and an anti‐aging reagent, the nicotinamide mononucleotide (NMN), and indeed, administration of NMN alleviated senescent phenotypes of BMSCs. In vivo and clinical evidence from aging mice and patients with senile osteoporosis also confirmed that elevation of NAP1L2 expression was associated with suppressed osteoblastogenesis. Taken together, our findings suggest that NAP1L2 is a regulator of both BMSC cell senescence and osteogenic differentiation, and provide a new theoretical basis for aging‐related disease.
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Affiliation(s)
- Meilin Hu
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Liangyu Xing
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Li Zhang
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Fan Liu
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Sheng Wang
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Ying Xie
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Jingjing Wang
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Hongmei Jiang
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Jing Guo
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Xin Li
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Jingya Wang
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Lei Sui
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Changyi Li
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Dayong Liu
- Tianjin Medical University School of Stomatology Tianjin Medical University Tianjin China
| | - Zhiqiang Liu
- The Province and Ministry Co‐Sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
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12
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García-Lepe UO, Torres-Dimas E, Espinal-Centeno A, Cruz-Ramírez A, Bermúdez-Cruz RM. Evidence of requirement for homologous-mediated DNA repair during Ambystoma mexicanum limb regeneration. Dev Dyn 2022; 251:1035-1053. [PMID: 35040539 DOI: 10.1002/dvdy.455] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/22/2021] [Accepted: 01/06/2022] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Limb regeneration in the axolotl is achieved by epimorphosis, thus depending on the blastema formation, a mass of progenitor cells capable of proliferating and differentiating to recover all lost structures functionally. During regeneration, the blastema cells accelerate the cell cycle and duplicate its genome, which is inherently difficult to replicate because of its length and composition, thus being prone to suffer double-strand breaks. RESULTS We identified and characterized two remarkable components of the homologous recombination repair pathway (Amex.RAD51 and Amex.MRE11), which were heterologously expressed, biochemically characterized, and inhibited by specific chemicals. These same inhibitors were applied at different time points after amputation to study their effects during limb regeneration. We observed an increase in cellular senescent accompanied by a slight delay in regeneration at 28 days post-amputation regenerated tissues; moreover, inhibitors caused a rise in the double-strand break signaling as a response to the inhibition of the repair mechanisms. CONCLUSIONS We confirmed the participation and importance of homologous recombination during limb regeneration. Where the chemical inhibition induces double-strand breaks that lead to DNA damage associated senescence, or in an alternatively way, this damage could be possibly repaired by a different DNA repair pathway, permitting proper regeneration and avoiding senescence. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ulises Omar García-Lepe
- Genetics and Molecular Biology Department, Centro de Investigación y Estudios Avanzados del IPN Mexico city, Mexico
| | - Esteban Torres-Dimas
- Genetics and Molecular Biology Department, Centro de Investigación y Estudios Avanzados del IPN Mexico city, Mexico
| | - Annie Espinal-Centeno
- Molecular and Developmental Complexity Group, Unidad de Genómica Avanzada (LANGEBIO), Centro de Investigación y de Estudios Avanzados del IPN, Guanajuato, Mexico
| | - Alfredo Cruz-Ramírez
- Molecular and Developmental Complexity Group, Unidad de Genómica Avanzada (LANGEBIO), Centro de Investigación y de Estudios Avanzados del IPN, Guanajuato, Mexico
| | - Rosa María Bermúdez-Cruz
- Genetics and Molecular Biology Department, Centro de Investigación y Estudios Avanzados del IPN Mexico city, Mexico
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13
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Huang R, Zhou PK. DNA damage repair: historical perspectives, mechanistic pathways and clinical translation for targeted cancer therapy. Signal Transduct Target Ther 2021; 6:254. [PMID: 34238917 PMCID: PMC8266832 DOI: 10.1038/s41392-021-00648-7] [Citation(s) in RCA: 229] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/28/2021] [Accepted: 05/13/2021] [Indexed: 02/06/2023] Open
Abstract
Genomic instability is the hallmark of various cancers with the increasing accumulation of DNA damage. The application of radiotherapy and chemotherapy in cancer treatment is typically based on this property of cancers. However, the adverse effects including normal tissues injury are also accompanied by the radiotherapy and chemotherapy. Targeted cancer therapy has the potential to suppress cancer cells' DNA damage response through tailoring therapy to cancer patients lacking specific DNA damage response functions. Obviously, understanding the broader role of DNA damage repair in cancers has became a basic and attractive strategy for targeted cancer therapy, in particular, raising novel hypothesis or theory in this field on the basis of previous scientists' findings would be important for future promising druggable emerging targets. In this review, we first illustrate the timeline steps for the understanding the roles of DNA damage repair in the promotion of cancer and cancer therapy developed, then we summarize the mechanisms regarding DNA damage repair associated with targeted cancer therapy, highlighting the specific proteins behind targeting DNA damage repair that initiate functioning abnormally duo to extrinsic harm by environmental DNA damage factors, also, the DNA damage baseline drift leads to the harmful intrinsic targeted cancer therapy. In addition, clinical therapeutic drugs for DNA damage and repair including therapeutic effects, as well as the strategy and scheme of relative clinical trials were intensive discussed. Based on this background, we suggest two hypotheses, namely "environmental gear selection" to describe DNA damage repair pathway evolution, and "DNA damage baseline drift", which may play a magnified role in mediating repair during cancer treatment. This two new hypothesis would shed new light on targeted cancer therapy, provide a much better or more comprehensive holistic view and also promote the development of new research direction and new overcoming strategies for patients.
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Affiliation(s)
- Ruixue Huang
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Ping-Kun Zhou
- Department of Radiation Biology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, AMMS, Beijing, China.
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14
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Sjakste N, Riekstiņa U. DNA damage and repair in differentiation of stem cells and cells of connective cell lineages: A trigger or a complication? Eur J Histochem 2021; 65. [PMID: 33942598 PMCID: PMC8116775 DOI: 10.4081/ejh.2021.3236] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/16/2021] [Indexed: 02/06/2023] Open
Abstract
The review summarizes literature data on the role of DNA breaks and DNA repair in the differentiation of pluripotent stem cells (PSC) and connective cell lineages. PSC, including embryonic stem cells (ESC) and induced pluripotent stem cells (iPSC), are rapidly dividing cells with highly active DNA damage response (DDR) mechanisms to ensure the stability and integrity of the DNA. In PSCs, the most common DDR mechanism is error-free homologous recombination (HR) that is primarily active during the S phase of the cell cycle, whereas in quiescent, slow-dividing or non-dividing tissue progenitors and terminally differentiated cells, errorprone non-homologous end joining (NHEJ) mechanism of the double-strand break (DSB) repair is dominating. Thus, it seems that reprogramming and differentiation induce DNA strand breaks in stem cells which itself may trigger the differentiation process. Somatic cell reprogramming to iPSCs is preceded by a transient increase of the DSBs induced presumably by the caspase-dependent DNase or reactive oxygen species. In general, pluripotent stem cells possess stronger DNA repair systems compared to differentiated cells. Nonetheless, during a prolonged cell culture propagation, DNA breaks can accumulate due to the DNA polymerase stalling. Consequently, the DNA damage might trigger the differentiation of stem cells or replicative senescence of somatic cells. The differentiation process per se is often accompanied by a decrease in the DNA repair capacity. Thus, the differentiation might be triggered by DNA breaks, alternatively, the breaks can be a consequence of the decay in the DNA repair capacity of differentiated cells.
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15
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Chen Y, Sun J, Ju Z, Wang ZQ, Li T. Nbs1-mediated DNA damage repair pathway regulates haematopoietic stem cell development and embryonic haematopoiesis. Cell Prolif 2021; 54:e12972. [PMID: 33586242 PMCID: PMC7941224 DOI: 10.1111/cpr.12972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/27/2020] [Accepted: 12/07/2020] [Indexed: 12/16/2022] Open
Abstract
Objectives DNA damages pose threats to haematopoietic stem cells (HSC) maintenance and haematopoietic system homeostasis. Quiescent HSCs in adult mouse bone marrow are resistant to DNA damage, while human umbilical cord blood‐derived proliferative HSCs are prone to cell death upon ionizing radiation. Murine embryonic HSCs proliferate in foetal livers and divide symmetrically to generate HSC pool. How murine embryonic HSCs respond to DNA damages is not well‐defined. Materials and methods Mice models with DNA repair molecule Nbs1 or Nbs1/p53 specifically deleted in embryonic HSCs were generated. FACS analysis, in vitro and in vivo HSC differentiation assays, qPCR, immunofluorescence and Western blotting were used to delineate roles of Nbs1‐p53 signaling in HSCs and haematopoietic progenitors. Results Nbs1 deficiency results in persistent DNA breaks in embryonic HSCs, compromises embryonic HSC development and finally results in mouse perinatal lethality. The persistent DNA breaks in Nbs1 deficient embryonic HSCs render cell cycle arrest, while driving a higher rate of cell death in haematopoietic progenitors. Although Nbs1 deficiency promotes Atm‐Chk2‐p53 axis activation in HSCs and their progenies, ablation of p53 in Nbs1 deficient HSCs accelerates embryonic lethality. Conclusions Our study discloses that DNA double‐strand repair molecule Nbs1 is essential in embryonic HSC development and haematopoiesis. Persistent DNA damages result in distinct cell fate in HSCs and haematopoietic progenitors. Nbs1 null HSCs tend to be maintained through cell cycle arrest, while Nbs1 null haematopoietic progenitors commit cell death. The discrepancies are mediated possibly by different magnitude of p53 signaling.
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Affiliation(s)
- Yu Chen
- Institute of Aging Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - Jie Sun
- Jiangsu Hansoh Pharmaceutical Group Co., Ltd., Lianyungang, China
| | - Zhenyu Ju
- Institute of Aging Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - Zhao-Qi Wang
- Leibniz Institute on Aging - Fritz Lipmann Institute, Jena, Germany.,Faculty of Biology and Pharmacy, Friedrich-Schiller University of Jena, Jena, Germany
| | - Tangliang Li
- Institute of Aging Research, School of Medicine, Hangzhou Normal University, Hangzhou, China.,State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.,NHC Key Laboratory of Birth Defect for Research and Prevention, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China
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16
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García‐Lepe UO, Cruz‐Ramírez A, Bermúdez‐Cruz RM. DNA repair during regeneration in
Ambystoma mexicanum. Dev Dyn 2020; 250:788-799. [DOI: 10.1002/dvdy.276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/19/2020] [Accepted: 12/03/2020] [Indexed: 12/22/2022] Open
Affiliation(s)
- Ulises Omar García‐Lepe
- Genetics and Molecular Biology Department Centro de Investigacion y Estudios Avanzados del IPN Mexico city Mexico
| | - Alfredo Cruz‐Ramírez
- Molecular and Developmental Complexity Group Unidad de Genómica Avanzada (LANGEBIO), Centro de Investigación y de Estudios Avanzados del IPN Guanajuato Mexico
| | - Rosa María Bermúdez‐Cruz
- Genetics and Molecular Biology Department Centro de Investigacion y Estudios Avanzados del IPN Mexico city Mexico
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17
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Sharma S, Bhonde R. Genetic and epigenetic stability of stem cells: Epigenetic modifiers modulate the fate of mesenchymal stem cells. Genomics 2020; 112:3615-3623. [DOI: 10.1016/j.ygeno.2020.04.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/08/2020] [Accepted: 04/24/2020] [Indexed: 12/11/2022]
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18
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Nicaise AM, Willis CM, Crocker SJ, Pluchino S. Stem Cells of the Aging Brain. Front Aging Neurosci 2020; 12:247. [PMID: 32848716 PMCID: PMC7426063 DOI: 10.3389/fnagi.2020.00247] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/20/2020] [Indexed: 12/12/2022] Open
Abstract
The adult central nervous system (CNS) contains resident stem cells within specific niches that maintain a self-renewal and proliferative capacity to generate new neurons, astrocytes, and oligodendrocytes throughout adulthood. Physiological aging is associated with a progressive loss of function and a decline in the self-renewal and regenerative capacities of CNS stem cells. Also, the biggest risk factor for neurodegenerative diseases is age, and current in vivo and in vitro models of neurodegenerative diseases rarely consider this. Therefore, combining both aging research and appropriate interrogation of animal disease models towards the understanding of the disease and age-related stem cell failure is imperative to the discovery of new therapies. This review article will highlight the main intrinsic and extrinsic regulators of neural stem cell (NSC) aging and discuss how these factors impact normal homeostatic functions within the adult brain. We will consider established in vivo animal and in vitro human disease model systems, and then discuss the current and future trajectories of novel senotherapeutics that target aging NSCs to ameliorate brain disease.
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Affiliation(s)
- Alexandra M Nicaise
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
| | - Cory M Willis
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
| | - Stephen J Crocker
- Department of Neuroscience, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Stefano Pluchino
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
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19
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The ubiquitin-conjugating enzyme UBE2K determines neurogenic potential through histone H3 in human embryonic stem cells. Commun Biol 2020; 3:262. [PMID: 32451438 PMCID: PMC7248108 DOI: 10.1038/s42003-020-0984-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 05/01/2020] [Indexed: 01/05/2023] Open
Abstract
Histones modulate gene expression by chromatin compaction, regulating numerous processes such as differentiation. However, the mechanisms underlying histone degradation remain elusive. Human embryonic stem cells (hESCs) have a unique chromatin architecture characterized by low levels of trimethylated histone H3 at lysine 9 (H3K9me3), a heterochromatin-associated modification. Here we assess the link between the intrinsic epigenetic landscape and ubiquitin-proteasome system of hESCs. We find that hESCs exhibit high expression of the ubiquitin-conjugating enzyme UBE2K. Loss of UBE2K upregulates the trimethyltransferase SETDB1, resulting in H3K9 trimethylation and repression of neurogenic genes during differentiation. Besides H3K9 trimethylation, UBE2K binds histone H3 to induce its polyubiquitination and degradation by the proteasome. Notably, ubc-20, the worm orthologue of UBE2K, also regulates histone H3 levels and H3K9 trimethylation in Caenorhabditis elegans germ cells. Thus, our results indicate that UBE2K crosses evolutionary boundaries to promote histone H3 degradation and reduce H3K9me3 repressive marks in immortal cells. Azra Fatima et al. show that ubiquitin-conjugating enzyme UBE2K regulates neurogenic potential through its target histone H3 in human embryonic stem cells. This study suggests that UBE2K promotes histone H3 degradation, reducing the H3K9me3 repressive marks in immortal cells of both worms and humans.
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20
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Neri S, Borzì RM. Molecular Mechanisms Contributing to Mesenchymal Stromal Cell Aging. Biomolecules 2020; 10:biom10020340. [PMID: 32098040 PMCID: PMC7072652 DOI: 10.3390/biom10020340] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/13/2020] [Accepted: 02/19/2020] [Indexed: 02/07/2023] Open
Abstract
Mesenchymal stem/stromal cells (MSCs) are a reservoir for tissue homeostasis and repair that age during organismal aging. Beside the fundamental in vivo role of MSCs, they have also emerged in the last years as extremely promising therapeutic agents for a wide variety of clinical conditions. MSC use frequently requires in vitro expansion, thus exposing cells to replicative senescence. Aging of MSCs (both in vivo and in vitro) can affect not only their replicative potential, but also their properties, like immunomodulation and secretory profile, thus possibly compromising their therapeutic effect. It is therefore of critical importance to unveil the underlying mechanisms of MSC senescence and to define shared methods to assess MSC aging status. The present review will focus on current scientific knowledge about MSC aging mechanisms, control and effects, including possible anti-aging treatments.
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21
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Wang Y, Lai L, Guo W, Peng S, Liu R, Hong P, Wei G, Li F, Jiang S, Wang P, Li J, Lei H, Zhao W, Xu S. Inhibition of Ku70 in a high-glucose environment aggravates bupivacaine-induced dorsal root ganglion neurotoxicity. Toxicol Lett 2020; 318:104-113. [DOI: 10.1016/j.toxlet.2019.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/17/2019] [Accepted: 10/22/2019] [Indexed: 12/11/2022]
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22
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Neri S. Genetic Stability of Mesenchymal Stromal Cells for Regenerative Medicine Applications: A Fundamental Biosafety Aspect. Int J Mol Sci 2019; 20:ijms20102406. [PMID: 31096604 PMCID: PMC6566307 DOI: 10.3390/ijms20102406] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/08/2019] [Accepted: 05/10/2019] [Indexed: 12/12/2022] Open
Abstract
Mesenchymal stem/stromal cells (MSC) show widespread application for a variety of clinical conditions; therefore, their use necessitates continuous monitoring of their safety. The risk assessment of mesenchymal stem cell-based therapies cannot be separated from an accurate and deep knowledge of their biological properties and in vitro and in vivo behavior. One of the most relevant safety issues is represented by the genetic stability of MSCs, that can be altered during in vitro manipulation, frequently required before clinical application. MSC genetic stability has the potential to influence the transformation and the therapeutic effect of these cells. At present, karyotype evaluation represents the definitely prevailing assessment of MSC stability, but DNA alterations of smaller size should not be underestimated. This review will focus on current scientific knowledge about the genetic stability of mesenchymal stem cells. The techniques used and possible improvements together with regulatory aspects will also be discussed.
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Affiliation(s)
- Simona Neri
- Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy.
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