Review
Biology
Eric Sah, Sudarshan Krishnamurthy, Mohamed Y. Ahmidouch, Gregory J. Gillispie, Carol Milligan, Miranda E. Orr
Summary: Neuroscience and senescence fields have been running in parallel for nearly 60 years, but they have recently started to intersect, with neuroscientists applying senescence concepts to brain research. Cellular senescence is seen as a complex stress response culminating in a change in cell fate, with detrimental impact on surrounding cells.
Article
Cell Biology
Mitzi M. Gonzales, Sudarshan Krishnamurthy, Valentina Garbarino, Ali S. Daeihagh, Gregory J. Gillispie, Gagan Deep, Suzanne Craft, Miranda E. Orr
Summary: The pathogenic processes of Alzheimer's disease are complex and involve the accumulation of senescent cells, which play a key role in disease progression. Targeting senescent cells shows promise in improving brain structure and function, offering a novel approach to treating AD.
MECHANISMS OF AGEING AND DEVELOPMENT
(2021)
Review
Immunology
Dominique E. Martin, Blake L. Torrance, Laura Haynes, Jenna M. Bartley
Summary: Immunometabolism plays a crucial role in aging, affecting immune cell activation and effector functions through metabolic pathways. It has been found that aging can impact the networks controlling immune cell metabolism, but further research is needed to fully understand these effects.
FRONTIERS IN IMMUNOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Fernanda Hernandez-Gonzalez, Rosa Faner, Mauricio Rojas, Alvar Agusti, Manuel Serrano, Jacobo Sellares
Summary: Fibrosing interstitial lung diseases are chronic and fatal lung diseases characterized by the irreversible accumulation of scar tissue in the lung tissue. Cellular senescence, defined as a cell fate decision caused by unrepairable cellular damage, plays an important role in the initiation and progression of pulmonary fibrosis, likely by promoting molecular and cellular changes in chronic fibrosing processes. Targeting cellular senescence may be a potential therapeutic approach for treating fibrosing ILDs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Endocrinology & Metabolism
Allyson K. Palmer, Tamar Tchkonia, James L. Kirkland
Summary: Cellular senescence contributes to inflammation and metabolic dysfunction in aging and obesity. Targeting senescent cells or their products shows promise in improving metabolic function. Initial evidence suggests that senolytic drugs are effective in depleting senescent cells.
MOLECULAR METABOLISM
(2022)
Review
Biochemistry & Molecular Biology
Natalie Kudlova, Juan Bautista De Sanctis, Marian Hajduch
Summary: Cellular senescence is an irreversible cell cycle arrest associated with age-related pathologies, DNA damage, and tissue repair. However, there is contradictory research concerning its triggering mechanisms and detection. This review summarizes recent findings, presents commonly used senescence models, and briefly describes well-known anti-aging drugs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Endocrinology & Metabolism
Tamar Tchkonia, Allyson K. Palmer, James L. Kirkland
Summary: The elderly population is growing faster worldwide, and age is a major predictor of chronic diseases. Enhancing healthspan and targeting fundamental aging mechanisms may lead to greater benefits than treating age-related diseases individually. More research is needed on interventions for aging processes.
JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM
(2021)
Article
Cell Biology
Matthew J. Yousefzadeh, Paul D. Robbins, Derek M. Huffman
Summary: Parabiosis is a valuable experimental method for studying the mechanisms of aging, particularly in differentiating cell autonomous and non-autonomous mechanisms of aging, as well as evaluating the effects of specific aging hallmarks. The technique has shown that exposure to young blood can rejuvenate cells and tissues in old mice by suppressing or clearing senescent cells, while exposure to old blood can drive senescence in young mice through non-autonomous mechanisms.
Review
Biochemistry & Molecular Biology
Lei Zhang, Louise E. Pitcher, Vaishali Prahalad, Laura J. Niedernhofer, Paul D. Robbins
Summary: The concept of geroscience focuses on targeting the ageing process itself as a means to improve human health. Cellular senescence, a state of irreversible cell arrest, has emerged as a potential therapeutic target to extend healthspan. Senescent cells develop a secretory phenotype that promotes chronic inflammation and tissue dysfunction. Therapeutic drugs that induce selective cell death of senescent cells or suppress the expression of senescence markers are being developed.
Article
Cell Biology
Manas Ranjan Sahu, Linchi Rani, Rhea Subba, Amal Chandra Mondal
Summary: Cellular senescence is a critical risk factor for neurodegenerative diseases, leading to neuroinflammation and mitochondrial dysfunction. It can serve as a primary therapeutic target for the treatment of neurodegenerative disorders.
MECHANISMS OF AGEING AND DEVELOPMENT
(2022)
Review
Physiology
Shruthi Hamsanathan, Aditi U. Gurkar
Summary: Lipids play a crucial role in cellular senescence and its regulation. Changes in lipid composition and levels can impact cell function and are associated with aging and inflammation. While there is some understanding of lipid metabolism in cellular senescence, the link between key regulators and lipid changes is still not fully understood.
FRONTIERS IN PHYSIOLOGY
(2022)
Review
Physiology
Toby Chin, Xin Er Lee, Pei Yi Ng, Yaelim Lee, Oliver Dreesen
Summary: Aging is characterized by gradual functional decline at the cellular and organismal level, leading to a higher risk of chronic illnesses. Skin, as the largest organ of the human body, displays visible signs of aging such as thinning, dryness, sagging, loss of elasticity, and wrinkles. Cellular senescence, a state of permanent growth arrest, is a key hallmark of aging and contributes to tissue dysfunction and inflammation. Senescent cells accumulate in aging tissues, including the skin, and secrete molecules that further disrupt tissue homeostasis. This review focuses on the role of cellular senescence in skin aging and age-related skin pathologies, and explores potential strategies for rejuvenating aged skin.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Geriatrics & Gerontology
Daniel S. Lark, Thomas J. LaRocca
Summary: The study found that the expression of exosome biogenesis genes is affected by age in many cell populations mostly independent of senescence, and may be further altered in Alzheimer's disease.
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES
(2022)
Review
Biochemistry & Molecular Biology
Prashanta Silwal, Allison M. Nguyen-Thai, Haneef Ahamed Mohammad, Yanshan Wang, Paul D. Robbins, Joon Y. Lee, Nam V. Vo
Summary: Cellular senescence is closely related to aging and age-related disorders. Senescent cells overproduce inflammatory and catabolic factors, leading to tissue degeneration. Chronic accumulation of senescent cells is associated with intervertebral disc degeneration (IDD) in aging populations.
Article
Biochemistry & Molecular Biology
Moon Kee Meang, Saesbyeol Kim, Ik-Hwan Kim, Han-Soo Kim, Byung-Soo Youn
Summary: This study found that the compound ONG41008 has both senogenic and senolytic potential, which can arrest uncontrolled proliferation in fibrogenesis or tumorigenesis. It induces cellular senescence and mitotic slippage in tumor cells, while showing no significant toxicity to normal cells. ONG41008 can distinguish between normal cells and aged or diseased cells and restore the important metabolic ratio in cancer cells. It could be a potential drug for fibrotic or tumorigenic diseases.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Dermatology
Mansoor Hussain, Sudarshan Krishnamurthy, Jaimin Patel, Edward Kim, Beverly A. Baptiste, Deborah L. Croteau, Vilhelm A. Bohr
Summary: Defects in DNA repair pathways and mitochondrial energy metabolism can lead to various skin disorders, including rashes and pigmentation abnormalities. Accumulation of oxidative DNA damage and dysfunctional mitochondria disrupt cellular homeostasis, increasing apoptosis. Genetic disorders of premature aging affecting DNA repair pathways and causing mitochondrial dysfunction, such as Rothmund-Thomson syndrome, Werner syndrome, and Cockayne syndrome, are also associated with skin diseases. Recent research has provided insight into the molecular mechanisms underlying these syndromes and their skin pathologies.
JOURNAL OF INVESTIGATIVE DERMATOLOGY
(2021)
Review
Biology
Eric Sah, Sudarshan Krishnamurthy, Mohamed Y. Ahmidouch, Gregory J. Gillispie, Carol Milligan, Miranda E. Orr
Summary: Neuroscience and senescence fields have been running in parallel for nearly 60 years, but they have recently started to intersect, with neuroscientists applying senescence concepts to brain research. Cellular senescence is seen as a complex stress response culminating in a change in cell fate, with detrimental impact on surrounding cells.
Article
Peripheral Vascular Disease
Sudarshan Krishnamurthy, Nidhi Reddy Sama, Ramesh Soundararajan
Summary: This study describes a known complication in endovascular procedures, which is the fracture of the angioplasty balloon. The authors propose a strategy of using a covered stent to contain the fractured balloon and prevent further complications.
JOURNAL OF VASCULAR ACCESS
(2023)
Article
Biochemistry & Molecular Biology
Emma Westermann-Clark, Ramani Soundararajan, Jutaro Fukumoto, Sahebgowda Sidramagowda Patil, Timothy M. Stearns, Smita Saji, Alexander Czachor, Helena Hernandez-Cuervo, Mason Breitzig, Sudarshan Krishnamurthy, Richard F. Lockey, Narasaiah Kolliputi
Summary: Abnormalities in airway epithelia and lung parenchyma are found in Atp8b1 mutant mice. MMP7 expression is significantly upregulated in these mice, suggesting potential involvement in the pathogenesis of pulmonary fibrosis.
Article
Health Care Sciences & Services
Rohan Chalasani, Sudarshan Krishnamurthy, Katie J. Suda, Terri Newman, Scott W. Delaney, Utibe R. Essien
Summary: The United States faces inequities in medical care and drug access, particularly for underrepresented racial and ethnic groups. Prioritizing pharmacoequity is crucial in ensuring optimal healthcare outcomes, which requires considering factors such as social policy, research infrastructure, patient and prescriber characteristics, and health policy.
JOURNAL OF HEALTH POLITICS POLICY AND LAW
(2022)
Article
Pharmacology & Pharmacy
Jutaro Fukumoto, Muling Lin, Mudassir Meraj Banday, Sahebgowda Sidramagowda Patil, Sudarshan Krishnamurthy, Mason Breitzig, Ramani Soundararajan, Lakshmi Galam, Venkata Ramireddy Narala, Colleen Johns, Kapilkumar Patel, John Dunning, Richard F. F. Lockey, Nirmal S. S. Sharma, Narasaiah Kolliputi
Summary: This study investigates the role of aconitase 1 (ACO1) in the pathogenesis of idiopathic pulmonary fibrosis (IPF) and its expression patterns in IPF lungs compared to non-IPF controls, bleomycin-treated lungs, and aging lungs. The results suggest that ACO1 expression in IPF lungs, particularly in vasculatures, may serve as a promising diagnostic target and provide insights into the irreversible nature of IPF.
FRONTIERS IN PHARMACOLOGY
(2022)
Article
Psychology, Clinical
Eric Sah, Annie Asher, Claire Houtsma, Joseph I. Constans
Summary: This study developed a tool to indirectly measure firearm beliefs and found an association between firearms and negatively valenced words. The tool showed good internal consistency and construct validity, and demonstrated significant positive correlations with other measures.
JOURNAL OF PERSONALITY ASSESSMENT
(2023)
Article
Health Policy & Services
Eric Sah, Robin J. Casten, Barry W. Rovner
Summary: Medication non-adherence has a significant impact on the health of African Americans with diabetes. A retrospective data analysis on 56 patients in two Philadelphia hospitals found that depressive symptoms were associated with negative health beliefs, such as perceived side effects and barriers to treatment adherence. These findings highlight the importance of addressing depression and negative health beliefs in the treatment of diabetes in middle-aged and older African American individuals.
COMMUNITY MENTAL HEALTH JOURNAL
(2023)
Letter
Clinical Neurology
Sudarshan Krishnamurthy, Francois G. Rollin
ALZHEIMERS & DEMENTIA
(2023)
Article
Multidisciplinary Sciences
Woori Kim, Mohit Tripathi, Chunhyung Kim, Satyapavan Vardhineni, Young Cha, Shamseer Kulangara Kandi, Melissa Feitosa, Rohit Kholiya, Eric Sah, Anuj Thakur, Yehan Kim, Sanghyeok Ko, Kaiya Bhatia, Sunny Manohar, Young-Bin Kong, Gagandeep Sindhu, Yoon-Seong Kim, Bruce Cohen, Diwan S. S. Rawat, Kwang-Soo Kim
Summary: An optimized agonist of Nurr1, 4A7C-301, has been found to protect dopamine neurons from environmental and genetic risk factors of Parkinson's disease (PD) in vitro, and improve motor and non-motor deficits in male rodent models of PD. This suggests that targeting the nuclear receptor Nurr1 could be a promising therapeutic approach for PD.
NATURE COMMUNICATIONS
(2023)
Article
Education, Scientific Disciplines
Sudarshan Krishnamurthy, Kevin Alexander Soltany, Kimberly Montez
Summary: Physicians play a crucial role as advocates for their patients, and medical education needs to go beyond the traditional biomedical model to incorporate population health and community engagement. The current guidelines for undergraduate medical education in the US lack structured training in health policy and advocacy, leaving trainees ill-prepared for their role as physician-advocates. There is a need to educate future physicians on legislative advocacy and effective community engagement, in order to address the social determinants of health.
JOURNAL OF MEDICAL EDUCATION AND CURRICULAR DEVELOPMENT
(2023)
Article
Cell Biology
Shiva Kazempour Dehkordi, Jamie Walker, Eric Sah, Emma Bennett, Farzaneh Atrian, Bess Frost, Benjamin Woost, Rachel E. Bennett, Timothy C. Orr, Yingyue Zhou, Prabhakar S. Andhey, Marco Colonna, Peter H. Sudmant, Peng Xu, Minghui Wang, Bin Zhang, Habil Zare, Miranda E. Orr
Summary: Senescent cells, contributing to pathology and dysfunction, were successfully identified in postmortem human brain tissues using a novel eigengene approach. These cells were found to be mainly excitatory neurons and overlapped with neurons containing neurofibrillary tangle pathology. The CDKN2D/p19 gene may play a significant role in these senescent cells.