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Xu W, Xiang X, Lin L, Gong ZH, Xiao WJ. l-Theanine delays d-galactose-induced senescence by regulating the cell cycle and inhibiting apoptosis in rat intestinal cells. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:2073-2084. [PMID: 37919877 DOI: 10.1002/jsfa.13096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/22/2023] [Accepted: 11/03/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND Intestinal senescence is associated with several aging-related diseases. l-Theanine (LTA) has demonstrated strong potential as an antioxidant and antisenescence agent. This study investigated the regulatory effect of LTA on cellular senescence using an in vitro model of d-galactose (D-Gal)-induced senescence in the rat epithelial cell line, intestinal epithelioid cell-6 (IEC-6). RESULTS Treatment of IEC-6 cells with 40 mg/mL D-Gal for 48 h resulted in the successful development of the senescent cell model. Compared with D-Gal alone, both LTA preventive and delayed intervention increased cell viability and the ratio of JC-1 monomers to aggregates, increased the antioxidant capacity, and decreased the advanced glycation end product (AGE) levels and the overall number of senescent cells. Preventive and delayed intervention with 1000 μM LTA alleviated the D-Gal-induced cell cycle arrest by regulating p38, p53, CDK4, and CDK6 expression at the mRNA and protein levels, and further induced CycD1 proteins. Moreover, LTA preventive intervention reduced apoptosis to a greater degree than delayed intervention by upregulating the expression of the receptors of AGEs, Bax, Bcl-2, and NF-κB at the mRNA and protein levels. CONCLUSION Our findings indicate that LTA intervention could attenuate senescence in IEC-6 cells by regulating the cell cycle and inhibiting apoptosis. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Wei Xu
- Key Lab of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Sino-Kenya Joint Laboratory of Tea Science, Hunan Agricultural University, Changsha, China
| | - Xi Xiang
- Key Lab of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Sino-Kenya Joint Laboratory of Tea Science, Hunan Agricultural University, Changsha, China
| | - Ling Lin
- Key Lab of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Sino-Kenya Joint Laboratory of Tea Science, Hunan Agricultural University, Changsha, China
| | - Zhi-Hua Gong
- Key Lab of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Sino-Kenya Joint Laboratory of Tea Science, Hunan Agricultural University, Changsha, China
| | - Wen-Jun Xiao
- Key Lab of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Sino-Kenya Joint Laboratory of Tea Science, Hunan Agricultural University, Changsha, China
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Schöfer S, Laffer S, Kirchberger S, Kothmayer M, Löhnert R, Ebner EE, Weipoltshammer K, Distel M, Pusch O, Schöfer C. Senescence-associated ß-galactosidase staining over the lifespan differs in a short- and a long-lived fish species. Eur J Histochem 2024; 68:3977. [PMID: 38568207 PMCID: PMC11017726 DOI: 10.4081/ejh.2024.3977] [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: 01/25/2024] [Accepted: 02/21/2024] [Indexed: 04/05/2024] Open
Abstract
During the aging process, cells can enter cellular senescence, a state in which cells leave the cell cycle but remain viable. This mechanism is thought to protect tissues from propagation of damaged cells and the number of senescent cells has been shown to increase with age. The speed of aging determines the lifespan of a species and it varies significantly in different species. To assess the progress of cellular senescence during lifetime, we performed a comparative longitudinal study using histochemical detection of the senescence-associated beta-galactosidase as senescence marker to map the staining patterns in organs of the long-lived zebrafish and the short-lived turquoise killifish using light- and electron microscopy. We compared age stages corresponding to human stages of newborn, childhood, adolescence, adult and old age. We found tissue-specific but conserved signal patterns with respect to organ distribution. However, we found dramatic differences in the onset of tissue staining. The stained zebrafish organs show little to no signal at newborn age followed by a gradual increase in signal intensity, whereas the organs of the short-lived killifish show an early onset of staining already at newborn stage, which remains conspicuous at all age stages. The most prominent signal was found in liver, intestine, kidney and heart, with the latter showing the most prominent interspecies divergence in onset of staining and in staining intensity. In addition, we found staining predominantly in epithelial cells, some of which are post-mitotic, such as the intestinal epithelial lining. We hypothesize that the association of the strong and early-onset signal pattern in the short-lived killifish is consistent with a protective mechanism in a fast growing species. Furthermore, we believe that staining in post-mitotic cells may play a role in maintaining tissue integrity, suggesting different roles for cellular senescence during life.
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Affiliation(s)
- Simon Schöfer
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Sylvia Laffer
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | | | - Michael Kothmayer
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Renate Löhnert
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Elmar E Ebner
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Klara Weipoltshammer
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Martin Distel
- St. Anna Children's Cancer Research Institute (CCRI), Vienna.
| | - Oliver Pusch
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
| | - Christian Schöfer
- Department for Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna.
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Softah A, Alotaibi MR, Alhoshani AR, Saleh T, Alhazzani K, Almutairi MM, AlRowis R, Alshehri S, Albekairy NA, Harada H, Boyd R, Chakraborty E, Gewirtz DA, As Sobeai HM. The Combination of Radiation with PARP Inhibition Enhances Senescence and Sensitivity to the Senolytic, Navitoclax, in Triple Negative Breast Tumor Cells. Biomedicines 2023; 11:3066. [PMID: 38002066 PMCID: PMC10669784 DOI: 10.3390/biomedicines11113066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Despite significant advances in the treatment of triple-negative breast cancer, this disease continues to pose a clinical challenge, with many patients ultimately suffering from relapse. Tumor cells that recover after entering into a state of senescence after chemotherapy or radiation have been shown to develop a more aggressive phenotype, and to contribute to disease recurrence. By combining the PARP inhibitor (PARPi), talazoparib, with radiation, senescence was enhanced in 4T1 and MDA-MB-231 triple-negative breast cancer cell lines (based on SA-β-gal upregulation, increased expression of CDKN1A and the senescence-associated secretory phenotype (SASP) marker, IL6). Subsequent treatment of the radiation- and talazoparib-induced senescent 4T1 and MDA-MB231 cells with navitoclax (ABT-263) resulted in significant apoptotic cell death. In immunocompetent tumor-bearing mice, navitoclax exerted a modest growth inhibitory effect when used alone, but dramatically interfered with the recovery of 4T1-derived tumors induced into senescence with ionizing radiation and talazoparib. These findings support the potential utility of a senolytic strategy in combination with the radiotherapy/PARPi combination to mitigate the risk of disease recurrence in triple-negative breast cancer.
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Affiliation(s)
- Abrar Softah
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Moureq R. Alotaibi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Ali R. Alhoshani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Tareq Saleh
- Department of Pharmacology and Public Health, Faculty of Medicine, The Hashemite University, Zarqa 13133, Jordan;
| | - Khalid Alhazzani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Mashal M. Almutairi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Raed AlRowis
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Samiyah Alshehri
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Norah A. Albekairy
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
| | - Hisashi Harada
- Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA;
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA;
| | - Rowan Boyd
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA; (R.B.); (E.C.)
| | - Eesha Chakraborty
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA; (R.B.); (E.C.)
| | - David A. Gewirtz
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA;
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA; (R.B.); (E.C.)
| | - Homood M. As Sobeai
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (A.S.); (M.R.A.); (A.R.A.); (K.A.); (M.M.A.); (S.A.); (N.A.A.)
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Cobalamin Deficiency May Induce Astrosenescence—An In Vitro Study. Cells 2022; 11:cells11213408. [PMID: 36359805 PMCID: PMC9655094 DOI: 10.3390/cells11213408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/19/2022] [Accepted: 10/26/2022] [Indexed: 11/30/2022] Open
Abstract
Cobalamin (vitamin B12) deficiency is one of the major factors causing degenerative changes in the nervous system and, thus, various neurological and psychiatric symptoms. The underlying cellular mechanism of this phenomenon is not yet fully understood. An accumulation of senescent astrocytes has been shown to contribute to a wide range of pathologies of the nervous system, including neurodegenerative disorders. This study aimed to investigate whether cobalamin deficiency triggers astrosenescence. After inducing cobalamin deficiency in normal human astrocytes in vitro, we examined biomarkers of cellular senescence: SA-β-gal, p16INK4A, and p21Waf1/Cip1 and performed cell nuclei measurements. The obtained results may contribute to an increase in the knowledge of the cellular effects of cobalamin deficiency in the context of astrocytes. In addition, the presented data suggest a potential causative agent of astrosenescence that has not been proven to date.
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