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No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown 2018 California State University, Fullerton

No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown

International Journal of Exercise Science

International Journal of Exercise Science 11(4): 68-74, 2018. Softball and baseball are games that require multiple skill sets such as throwing, hitting and fielding. Players spend a copious amount of time in batting practice in order to be successful hitters. Variables commonly associated with successful hitting include bat velocity and torso rotation. The concept of overspeed bodyweight assistance (BWA) has shown increases in vertical jump and sprint times, but not hip rotation and batting. The purpose of this study was to examine the effects of assisted hip rotation on bat velocity. Twenty-one male and female recreational softball and baseball players …


The Effect Of A Single Bout Of High Intensity Intermittent Exercise On Glucose Tolerance In Non-Diabetic Older Adults, Hannah M. Lithgow, Melanie Leggate 2018 Edinburgh Napier University

The Effect Of A Single Bout Of High Intensity Intermittent Exercise On Glucose Tolerance In Non-Diabetic Older Adults, Hannah M. Lithgow, Melanie Leggate

International Journal of Exercise Science

International Journal of Exercise Science 11(3): 95-105, 2018. Our aim was to investigate the acute effects of a single bout of high intensity intermittent training (HIIT) on glucose tolerance and other physiological and metabolic markers in non-diabetic older adults. Fourteen healthy older adults (age, 64 ± 2 y; BMI, 25.7 ± 2.8 kg·m-2) performed two acute exercise trials: continuous moderate intensity exercise (MOD) and HIIT, with the response to an oral glucose tolerance test (OGTT) determined <24 hours after. Inflammatory, haematological, and lipid parameters were also assessed the day after each trial. There was an effect of the trials on the insulin response to an OGTT (P=0.047), but not the glucose response. Following an acute bout of HIIT, insulin concentration during an OGTT was elevated at 60 min compared to the control trial (P=0.045), indicating more insulin was secreted, but glucose concentration was unchanged in all trials. The study findings demonstrate that a single bout of HIIT affects the insulin response but not the glycaemic response to a glucose load, proffering a potential benefit for metabolic health in older adults.


The Short-Term Effects Of Lying, Sitting And Standing On Energy Expenditure In Women, Collin Popp, William C. Bridges, Elliot D. Jesch 2018 Clemson University

The Short-Term Effects Of Lying, Sitting And Standing On Energy Expenditure In Women, Collin Popp, William C. Bridges, Elliot D. Jesch

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 129-136, 2018. The deleterious health effects of too much sitting have been associated with an increased risk for overweight and obesity. Replacing sitting with standing is the proposed intervention to increase daily energy expenditure (EE). The purpose of this study was to determine the short-term effects of lying, sitting, and standing postures on EE, and determine the magnitude of the effect each posture has on EE using indirect calorimetry (IC). Twenty-eight healthy females performed three separate positions (lying, sitting, standing) in random order. Inspired and expired gases were collected for 45-minutes (15 minutes for …


Effects Of Strength Training Sessions Performed With Different Exercise Orders And Intervals On Blood Pressure And Heart Rate Variability, Sandro Lemos, Tiago Figueiredo, Silvio Marques, Thalita Leite, Diogo Cardozo, Jeffrey Willardson, Roberto Simão 2018 Federal University of Rio de Janeiro. School of Physical Education and Sports

Effects Of Strength Training Sessions Performed With Different Exercise Orders And Intervals On Blood Pressure And Heart Rate Variability, Sandro Lemos, Tiago Figueiredo, Silvio Marques, Thalita Leite, Diogo Cardozo, Jeffrey Willardson, Roberto Simão

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 55-67, 2018. This study compared the effect of a strength training session performed at different exercise orders and rest intervals on blood pressure and heart rate variability (HRV). Fifteen trained men performed different upper body exercise sequences [large to small muscle mass (SEQA) and small to large muscle mass (SEQB)] in randomized order with rest intervals between sets and exercises of 40 or 90 seconds. Fifteen repetition maximum loads were tested to control the training intensity and the total volume load. The results showed, significant reductions for systolic blood pressure (SBP) for all sequences …


Serum Tumor Necrosis Factor-Alpha Associates With Myocardial Oxygen Demand And Exercise Tolerance In Postmenopausal Women, Stephen J. Carter, David R. Bryan, William H. Neumeier, Stephen P. Glasser, Gary R. Hunter 2018 University of Alabama at Birmingham

Serum Tumor Necrosis Factor-Alpha Associates With Myocardial Oxygen Demand And Exercise Tolerance In Postmenopausal Women, Stephen J. Carter, David R. Bryan, William H. Neumeier, Stephen P. Glasser, Gary R. Hunter

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 42-54, 2018. The functional implications of serum tumor necrosis factor-alpha (TNF-a), a marker of oxidative stress, on hemodynamic parameters at rest and during physical exertion are unclear. The aims of this investigation were to examine the independent associations of TNF-a on myocardial oxygen demand at rest and during submaximal exercise, while also evaluating the association of TNF-a on exercise tolerance. Forty, postmenopausal women, provided blood samples and completed a modified-Balke protocol to measure maximal oxygen uptake (VO2max). Large artery compliance was measured by pulse contour analyses while rate-pressure product (RPP), an index …


Six Weeks Of Moderate Functional Resistance Training Increases Basal Metabolic Rate In Sedentary Adult Women, Jon Stavres, McAuley P. Zeigler, M. Pasternostro Bayles 2018 Kent State University

Six Weeks Of Moderate Functional Resistance Training Increases Basal Metabolic Rate In Sedentary Adult Women, Jon Stavres, Mcauley P. Zeigler, M. Pasternostro Bayles

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 32-41, 2018. Basal metabolic rate (BMR) is a significant contributor to total daily energy expenditure. Traditional resistance exercise has been shown to elicit fat free mass (FFM) related increases in BMR. The purpose of this study was to examine the effect of a functional resistance exercise program on the BMR of a group of previously sedentary adult women in a free-living condition. 19 sedentary, apparently healthy women underwent body composition analysis and had BMR assessed before and after a 6-week functional resistance training program. The resistance training program was designed to be progressive in …


Acute Cardiovascular Responses After A Single Bout Blood Flow Restriction Training, Moisés Picón Martínez, Iván Chulvi Medrano, Juan Manuel Cortell Tormo, Juan Tortosa, Yasser Alkhadar, José Sanchís, Gilberto Laurentino 2018 University of Alicante

Acute Cardiovascular Responses After A Single Bout Blood Flow Restriction Training, Moisés Picón Martínez, Iván Chulvi Medrano, Juan Manuel Cortell Tormo, Juan Tortosa, Yasser Alkhadar, José Sanchís, Gilberto Laurentino

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 20-31, 2018. Different types of exercise might produce reductions in blood pressure (BP). One physiological mechanism that could explain the lowering adaptation effect on BP after an exercise program is an improved in baroreflex control of muscle sympathetic nerve activity. Consequently, exploring the different methods of training and their post-exercise hypotension (PEH) becomes of interest for healthcare providers. Recently, it has been suggested that blood flow restriction training (BFR) can generate PEH. The aim of this study was to determine the acute response on cardiovascular variables after low intensity resistance training with BFR in …


Comparison Of Varying Heel To Toe Differences And Cushion To Barefoot Running In Novice Minimalist Runners, Daniel C. Moody, Iain Hunter, William J. Myrer 2018 Brigham Young University - Provo

Comparison Of Varying Heel To Toe Differences And Cushion To Barefoot Running In Novice Minimalist Runners, Daniel C. Moody, Iain Hunter, William J. Myrer

International Journal of Exercise Science

International Journal of Exercise Science 11(1): 13-19, 2018. There are many different types of footwear available for runners in today’s market. Many of these shoes claim to help runners run more efficiently by altering an individual’s stride mechanics. Minimalist footwear claims to aid runners run more on their forefeet whereas more traditional footwear provides more cushioning specifically for a heel first landing. The purpose of this paper was to determine if runners, who were accustomed to running in traditional footwear would alter their running mechanics while running acutely in various types of minimalist footwear. Twelve subjects, accustomed to running in …


Dynamic Stability In Gymnasts, Non-Balance Athletes, And Active Controls, Hope Sloanhoffer, Kathryn Harrison, Jean L. McCrory PhD 2018 West Virginia University

Dynamic Stability In Gymnasts, Non-Balance Athletes, And Active Controls, Hope Sloanhoffer, Kathryn Harrison, Jean L. Mccrory Phd

International Journal of Exercise Science

International Journal of Exercise Science 11(1): 1-12, 2018. Gymnastics by nature is a balance sport requiring both static and dynamic stability. To our knowledge, the center of pressure (COP) movement of collegiate gymnasts has not been compared to other collegiate athletes and healthy controls during static and dynamic postural stability tasks. Our purpose was to investigate static and dynamic stability in collegiate gymnasts, non-gymnast athletes and non-athlete controls. Data were collected on female university gymnasts (n=10), university athletes in other sports (n=10), and active non-athlete controls (n=10). Static balance was measured using a commercially available six-condition static test and dynamic …


Targeted Limb Heating Augments The Actions Of Igf1 In The Growth Plate And Increases Bone Elongation In Growing Mice, Holly Lyn Racine 2018 Marshall University

Targeted Limb Heating Augments The Actions Of Igf1 In The Growth Plate And Increases Bone Elongation In Growing Mice, Holly Lyn Racine

Theses, Dissertations and Capstones

Bone elongation disorders can lead to painful musculoskeletal disabilities in adulthood. Existing treatment options to correct left-right asymmetry in limb length include invasive surgeries and/or drug regimens. These are often only partially effective. Previous studies in weanling mice have shown that a daily application of mild heat (40°C) to limbs on one side of the body could be used to noninvasively enhance bone elongation. However, the impact of heat-treatment on bone at the cellular level remains elusive. The epiphyseal growth plate, the band of cartilage located at each end of long bones, is the main site of longitudinal growth and …


Reduction Of Endothelial Nitric Oxide Increases The Adhesiveness Of Constitutive Endothelial Membrane Icam-1 Through Src-Mediated Phosphorylation, Feng Gao, Brandon P. Lucke-Wold, Xiang Li, Aric F. Logsdon, Li-Chong Xu, Sulei Xu, Kyle B. LaPenna, Huaqi Wang, M.A. Hassan Talukder, Christopher A. Siedlecki, Jason D. Huber, Charles L. Rosen, Pingnian He 2018 Pennsylvania State University

Reduction Of Endothelial Nitric Oxide Increases The Adhesiveness Of Constitutive Endothelial Membrane Icam-1 Through Src-Mediated Phosphorylation, Feng Gao, Brandon P. Lucke-Wold, Xiang Li, Aric F. Logsdon, Li-Chong Xu, Sulei Xu, Kyle B. Lapenna, Huaqi Wang, M.A. Hassan Talukder, Christopher A. Siedlecki, Jason D. Huber, Charles L. Rosen, Pingnian He

Faculty & Staff Scholarship

Nitric oxide (NO) is a known anti-adhesive molecule that prevents platelet aggregation and leukocyte adhesion to endothelial cells (ECs). The mechanism has been attributed to its role in the regulation of adhesion molecules on leukocytes and the adhesive properties of platelets. Our previous study conducted in rat venules found that reduction of EC basal NO synthesis caused EC ICAM-1-mediated firm adhesion of leukocytes within 10–30min. This quick response occurred in the absence of alterations of adhesion molecules on leukocytes and also opposes the classical pattern of ICAM-1-mediated leukocyte adhesion that requires protein synthesis and occurs hours after stimulation. The objective …


Loss Of The Intellectual Disability And Autism Gene Cc2d1a And Its Homolog Cc2d1b Differentially Affect Spatial Memory, Anxiety, And Hyperactivity, Marta Zamarbide, Adam Oaks, Heather Pond, Julia Adelman, M. Chiara Manzini 2018 George Washington University

Loss Of The Intellectual Disability And Autism Gene Cc2d1a And Its Homolog Cc2d1b Differentially Affect Spatial Memory, Anxiety, And Hyperactivity, Marta Zamarbide, Adam Oaks, Heather Pond, Julia Adelman, M. Chiara Manzini

Pharmacology and Physiology Faculty Publications

Hundreds of genes are mutated in non-syndromic intellectual disability (ID) and autism spectrum disorder (ASD), with each gene often involved in only a handful of cases. Such heterogeneity can be daunting, but rare recessive loss of function (LOF) mutations can be a good starting point to provide insight into the mechanisms of neurodevelopmental disease. Biallelic LOF mutations in the signaling scaffold CC2D1Acause a rare form of autosomal recessive ID, sometimes associated with ASD and seizures. In parallel, we recently reported that Cc2d1a-deficient mice present with cognitive and social deficits, hyperactivity and anxiety. In Drosophila, loss of the only …


Optimization Of Wavelength Selection For Multispectral Image Acquisition: A Case Study Of Atrial Ablation Lesions, Huda Asfour, S. Guan, Narine Muselimyan, Luther M. Swift, Murray Loew, Narine Sarvazyan 2018 George Washington University

Optimization Of Wavelength Selection For Multispectral Image Acquisition: A Case Study Of Atrial Ablation Lesions, Huda Asfour, S. Guan, Narine Muselimyan, Luther M. Swift, Murray Loew, Narine Sarvazyan

Pharmacology and Physiology Faculty Publications

In vivo autofluorescence hyperspectral imaging of moving objects can be challenging due to motion artifacts and to the limited amount of acquired photons. To address both limitations, we selectively reduced the number of spectral bands while maintaining accurate target identification. Several downsampling approaches were applied to data obtained from the atrial tissue of adult pigs with sites of radiofrequency ablation lesions. Standard image qualifiers such as the mean square error, the peak signal-to-noise ratio, the structural similarity index map, and an accuracy index of lesion component images were used to quantify the effects of spectral binning, an increased spectral distance …


Mrub_1325, Mrub_1326, Mrub_1327, And Mrub_1328 Are Orthologs Of B_3454, B_3455, B_3457, B_3458, Respectively Found In Escherichia Coli Coding For A Branched Chain Amino Acid Atp Binding Cassette (Abc) Transporter System, Bennett Tomlin, Adam Buric, Dr. Lori Scott 2018 Augustana College, Rock Island Illinois

Mrub_1325, Mrub_1326, Mrub_1327, And Mrub_1328 Are Orthologs Of B_3454, B_3455, B_3457, B_3458, Respectively Found In Escherichia Coli Coding For A Branched Chain Amino Acid Atp Binding Cassette (Abc) Transporter System, Bennett Tomlin, Adam Buric, Dr. Lori Scott

Meiothermus ruber Genome Analysis Project

In this project we investigated the biological function of the genes Mrub_1325, Mrub_1326, Mrub_1327, and Mrub_1328 (KEGG map number 02010). We predict these genes encode components of a Branched Chain Amino Acid ATP Binding Cassette (ABC) transporter: 1) Mrub_1325 (DNA coordinates 1357399-1358130 on the reverse strand) encodes the ATP binding domain; 2) Mrub_1326 (DNA coordinates 1358127-1359899 on the reverse strand) encodes the ATP-binding domain and permease domain; 3) Mrub_1327 (DNA coordinates 1359899-1360930 on the reverse strand) encodes a permease domain; and 4)Mrub_1328 (DNA coordinates 1711022-1712185 on the reverse strand) encodes the substrate binding domain. This system is not predicted to …


Confirmation That Mrub_1751 Is Homologous To E. Coli Xylf, Mrub_1752 Is Homologous To E. Coli Xylh, And Mrub_1753 Is Homologous To E. Coli Xylg, Ben Price, Dr. Lori Scott 2018 Augustana College, Rock Island Illinois

Confirmation That Mrub_1751 Is Homologous To E. Coli Xylf, Mrub_1752 Is Homologous To E. Coli Xylh, And Mrub_1753 Is Homologous To E. Coli Xylg, Ben Price, Dr. Lori Scott

Meiothermus ruber Genome Analysis Project

In this project we investigated the biological function of the genes Mrub_1751, Mrub_1752 and Mrub_1753 (KEGG map number 02010). We predict these genes encode components of a D-xylose ATP Binding Cassette (ABC) transporter: 1) Mrub_1752 (DNA coordinates 1809004-1810224 on the forward strand) encodes the permease component (aka transmembrane domain), predicted to be an ortholog and 2) Mrub_1753 (DNA coordinates 1810227-1811000 on the forward strand) encodes the ATP-binding domain (aka nucleotide binding domain); and 3) Mrub_1751 (DNA coordinates 1807855-1808892 on the forward strand) encodes the solute binding protein. The ABC-transporter for M. ruber to transport D-xylose is homologous with the transporter …


Maternal Engineered Nanomaterial Inhalation During Gestation Alters The Fetal Transcriptome, P.A. Stapleton, Q.A. Hathaway, C.E. Nichols, A.B. Abukabda, M.V. Pinti, D.L. Shepherd, C.R. McBride, J. Yi, V.C. Castranova, J.M Hollander, Timothy Robert Nurkiewicz 2018 Rutgers University & Environmental and Occupational Health Sciences Institute

Maternal Engineered Nanomaterial Inhalation During Gestation Alters The Fetal Transcriptome, P.A. Stapleton, Q.A. Hathaway, C.E. Nichols, A.B. Abukabda, M.V. Pinti, D.L. Shepherd, C.R. Mcbride, J. Yi, V.C. Castranova, J.M Hollander, Timothy Robert Nurkiewicz

Faculty & Staff Scholarship

Background: The integration of engineered nanomaterials (ENM) is well-established and widespread in clinical, commercial, and domestic applications. Cardiovascular dysfunctions have been reported in adult populations after exposure to a variety of ENM. As the diversity of these exposures continues to increase, the fetal ramifications of maternal exposures have yet to be determined. We, and others, have explored the consequences of ENM inhalation during gestation and identified many cardiovascular and metabolic outcomes in the F1 generation. The purpose of these studies was to identify genetic alterations in the F1 generation of Sprague-Dawley rats that result from maternal ENM inhalation during gestation. …


Absolute Lymphocyte And Neutrophil Counts In Neonatal Ischemic Brain Injury, Jessica M. Povroznik, Elizabeth B. Engler-Chiurazzi, Tania Nanavati, Paola Pergami 2018 West Virginia University

Absolute Lymphocyte And Neutrophil Counts In Neonatal Ischemic Brain Injury, Jessica M. Povroznik, Elizabeth B. Engler-Chiurazzi, Tania Nanavati, Paola Pergami

Faculty & Staff Scholarship

Objectives: This study aimed to identify differences in absolute neutrophils, lymphocytes, and neutrophil-to-lymphocyte ratio between neonates with two forms of ischemic brain injury, hypoxic-ischemic encephalopathy, and acute ischemic stroke, compared to controls. We also aimed to determine whether this neutrophil/lymphocyte response pattern is associated with disease severity or is a consequence of the effects of total-body cooling, an approved treatment for moderate-to-severe hypoxic-ischemic encephalopathy. Methods: A retrospective chart review of 101 neonates with hypoxic-ischemic encephalopathy + total-body cooling (n = 26), hypoxic-ischemic encephalopathy (n=12), acute ischemic stroke (n=15), and transient tachypnea of the newborn (n=48) was conducted; transient tachypnea of …


Dysregulation Of Daf-16/Foxo3a-Mediated Stress Responses Accelerates T Oxidative Dna Damage Induced Aging, Aditi U. Gurkar, Andria R. Robinson, Yuxiang Cui, Xuesen Li, Shailaja K. Allani, Amanda Webster, Mariya Muravia, Mohammad Fallahi, Herbert Weissbach, Paul D. Robbins, Yinsheng Wang, Eric E. Kelley, Claudette M. St. Croix, Laura J. Niedernhofer, Matthew S. Gill 2018 The Scripps Research Institute

Dysregulation Of Daf-16/Foxo3a-Mediated Stress Responses Accelerates T Oxidative Dna Damage Induced Aging, Aditi U. Gurkar, Andria R. Robinson, Yuxiang Cui, Xuesen Li, Shailaja K. Allani, Amanda Webster, Mariya Muravia, Mohammad Fallahi, Herbert Weissbach, Paul D. Robbins, Yinsheng Wang, Eric E. Kelley, Claudette M. St. Croix, Laura J. Niedernhofer, Matthew S. Gill

Faculty & Staff Scholarship

DNA damage is presumed to be one type of stochastic macromolecular damage that contributes to aging, yet little is known about the precise mechanism by which DNA damage drives aging. Here, we attempt to address this gap in knowledge using DNA repair-deficient C. elegans and mice. ERCC1-XPF is a nuclear endonuclease required for genomic stability and loss of ERCC1 in humans and mice accelerates the incidence of age-related pathologies. Like mice, ercc-1 worms are UV sensitive, shorter lived, display premature functional decline and they accumulate spontaneous oxidative DNA lesions (cyclopurines) more rapidly than wild-type worms. We found that ercc-1 worms …


Effects Of A 60 Minute On Ice Game Simulation On The Balance Error Scoring System, Philip Cameron, Noelle C. Sotero, Justin Byers 2018 Bethel University

Effects Of A 60 Minute On Ice Game Simulation On The Balance Error Scoring System, Philip Cameron, Noelle C. Sotero, Justin Byers

Applied Health Sciences Student Works

Mild traumatic brain injuries (mTBIs) are common in contact sports. There is an association between mTBIs and altered motor function. BioSway technology measures individuals’ balance using the Balance Error Scoring System (BESS). Prior to incorporating BESS testing in concussion protocol, other variables that influence the BESS test require review. The objective of this study is to determine if game fatigue in hockey players also influences the BESS score. 23 male (21.08 ± 1.09) National Collegiate Athletic Association (NCAA) athletes were tested using the BioSway™ (Biodex, USA). The BESS test measures the Sway Index (SI) - a calculation of deviation from …


Spontaneous Dna Damage To The Nuclear Genome Promotes Senescence, T Redox Imbalance And Aging, Andria R. Robinson, Matthew J. Yousefzadeh, Tania A. Rozgaja, Jin Wang, Xuesen Li, Jeremy S. Tilstra, Chelsea H. Feldman, Siobhan Q. Gregg, Caroline H. Johnson, Erin M. Skoda, Marie-Celine Frantz, Harris Bell-Temin, Hannah Pope-Varsalona, Aditi U. Gurkar, Luigi A. Nasto, Rena A.S. Robinson, Heike Fuhrmann-Stroissnigg, Jolanta Czerwinska, Sara J. McGowan, Nadiezhda Cantu-Madellin, Jamie B. Harris, Salony Maniar, Mark A. Ross, Christy E. Trussoni, Nicholas F. LaRusso, Eugenia Cifuentes-Pagano, Patrick J. Pagano, Barbara Tudek, Nam V. Vo, Lora H. Rigatti, Patricia L. Opresko, Donna B. Stolz, Simon C. Watkins, Christin E. Burd, Claudette M. St, Croix, Gary Siuzdak, Nathan A. Yates, Paul D. Robbins, Yinsheng Wang, Peter Wipf, Eric E. Kelley, Laura J. Neidernhofer 2018 University of Pittsburgh

Spontaneous Dna Damage To The Nuclear Genome Promotes Senescence, T Redox Imbalance And Aging, Andria R. Robinson, Matthew J. Yousefzadeh, Tania A. Rozgaja, Jin Wang, Xuesen Li, Jeremy S. Tilstra, Chelsea H. Feldman, Siobhan Q. Gregg, Caroline H. Johnson, Erin M. Skoda, Marie-Celine Frantz, Harris Bell-Temin, Hannah Pope-Varsalona, Aditi U. Gurkar, Luigi A. Nasto, Rena A.S. Robinson, Heike Fuhrmann-Stroissnigg, Jolanta Czerwinska, Sara J. Mcgowan, Nadiezhda Cantu-Madellin, Jamie B. Harris, Salony Maniar, Mark A. Ross, Christy E. Trussoni, Nicholas F. Larusso, Eugenia Cifuentes-Pagano, Patrick J. Pagano, Barbara Tudek, Nam V. Vo, Lora H. Rigatti, Patricia L. Opresko, Donna B. Stolz, Simon C. Watkins, Christin E. Burd, Claudette M. St, Croix, Gary Siuzdak, Nathan A. Yates, Paul D. Robbins, Yinsheng Wang, Peter Wipf, Eric E. Kelley, Laura J. Neidernhofer

Faculty & Staff Scholarship

Accumulation of senescent cells over time contributes to aging and age-related diseases. However, what drives senescence in vivo is not clear. Here we used a genetic approach to determine if spontaneous nuclear DNA damage is sufficient to initiate senescence in mammals. Ercc1-/Δ mice with reduced expression of ERCC1-XPF endonuclease have impaired capacity to repair the nuclear genome. Ercc1-/Δ mice accumulated spontaneous, oxidative DNA damage more rapidly than wild-type (WT) mice. As a consequence, senescent cells accumulated more rapidly in Ercc1-/Δ mice compared to repair-competent animals. However, the levels of DNA damage and senescent cells in Ercc1-/Δ mice never exceeded that …


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