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- Type:
- Dataset
- Description/Abstract:
- Retrospective chart review project of subjects receiving lumbar epidural steroid injections for low back pain associated with degenerative disc disease. The primary objective was to compare the efficacy of two different steroids used during the time period studied, methylprednisolone and triamcinolone.
- Creator/Author:
- Strong, Judith
- Submitter:
- Judith Strong
- Date Uploaded:
- 08/24/2023
- Date Modified:
- 08/15/2024
- Date Created:
- 2023-08
- License:
- Open Data Commons Public Domain Dedication and License (PDDL)
- Type:
- Dataset
- Description/Abstract:
- ABSTRACT Purpose: Tongue manometry (i.e. tongue pressure measurement) is a commonly used assessment for patients with suspected oral-motor involvement in swallowing disorders. Availability of lingual manometry has changed in recent years, with the introduction of the TongueometerTM device being a more affordable tongue manometry system. The purpose of this study was to test concurrent (criterion) validity of the TongueometerTM compared to the current standard reference device, the Iowa Oral Performance Instrument, IOPI®. Method: Adults without dysphagia were recruited for participation in this study. Standard lingual measurements (swallowing-related pressures, maximum isometric pressure (MIP), and maximum isometric endurance) were recorded, with the bulb anteriorly placed, with both devices, in a randomized order. The Bland-Altman method was used to determine concurrent (criterion) validity of these measurements compared to the clinical standard IOPI® device. A recently available suggested corrective value by Curtis and colleagues (2023) was also applied, with comparisons made between devices both with and without the Curtis correction. Results: The final sample included 70 adult participants aged 20-89 years (average age 52.3 years). Measures with the TongueometerTM device were significantly lower when compared with the same measures taken using the IOPI® (p<0.01) for all measures including MIP, endurance, and swallow pressures. The correction suggested by Curtis and colleagues did not ameliorate these differences. Conclusions: The TongueometerTM lingual measurements were consistently lower compared to the IOPI®. Clinical use of values taken with the TongueometerTM device should be compared to normative data published for each specific device. Available features of each device (e.g. display, bulb texture, technology/application) should be considered when selecting which device to use with an individual patient.
- Creator/Author:
- Krekeler, Brittany
- Submitter:
- Brittany Krekeler
- Date Uploaded:
- 01/26/2024
- Date Modified:
- 01/26/2024
- Date Created:
- 2020-01-01
- License:
- Open Data Commons Public Domain Dedication and License (PDDL)
- Type:
- Dataset
- Description/Abstract:
- Data from qualitative study "Employing Strategies to Address Implicit Racial Bias in the Home Visit Setting" Includes: written reflections by FM residents, resident focus group data, commitments-to-change, and 3-month follow up survey data
- Creator/Author:
- Goroncy, Anna
- Submitter:
- Anna Goroncy
- Date Uploaded:
- 03/03/2023
- Date Modified:
- 03/03/2023
- Date Created:
- 2020-01
- License:
- Open Data Commons Attribution License (ODC-By)
- Type:
- Document
- Description/Abstract:
- This is a preprint of a to be submitted paper that demonstrates that: (1) many important food allergens (eggs, milk, peanuts, tree nuts) induce the unfolded protein response (UPR) in intestinal epithelial cells; (2) induction of the UPR, in turn, stimulates the expression of pro-Th2 cytokines (IL-25, IL-33, TSLP) that are required for the induction of food allergy by these cytokines; (3) egg allergy is suppressed in mouse models by the UPR inhibitor, metformin (a drug widely used to treat diabetes mellitus); and (4) metformin appears to have a protective effects in humans who have alpha-gal syndrome, which is a form of food allergy.
- Creator/Author:
- Finkelman, Fred
- Submitter:
- Fred Finkelman
- Date Uploaded:
- 06/02/2020
- Date Modified:
- 06/02/2020
- Date Created:
- 2020-06-02
- License:
- Open Data Commons Attribution License (ODC-By)
- Type:
- Dataset
- Description/Abstract:
- This data set and accompanying files represents air monitoring data collected by the Environmental Protection Agency from 2009-08-17 to 2012-02-25 at the Warren Elementary School in Marietta, Ohio (39.393536, -81.554015). The variables of interest were the amount of manganese and lead in the air measured as PM10 particle size. The visualizations were created from monthly averages for the concentration of airborne manganese. The data was collected using the TO-15 collection systems for air monitoring device. (reference - https://www3.epa.gov/air/sat/pdfs/VocTechdocwithappendix1209.pdf) The files included are: The raw data - Marietta_WarrenElementraySchool_Raw.csv . Aggregated monthly averages of the raw data - Marietta_WarrenElementraySchool_Processed.csv. How the raw data are processed into monthly averages - Marietta_WarrenElementraySchool_WorkingFile.xlsx. How the video is generated- Marietta_WarrenElementraySchool.ppt. Video - Marietta_WarrenElementraySchool.mp4 - generated from Marietta_WarrenElementraySchool.ppt.
- Creator/Author:
- Erin Hayes; Zhiyuan Yao, and Tim Hilbert
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 10/26/2018
- Date Modified:
- 07/11/2019
- Date Created:
- 2009-08-17 to 2012-02-25
- License:
- CC0 1.0 Universal
- Type:
- Dataset
- Description/Abstract:
- This data set and accompanying files represents air monitoring data collected by the Environmental Protection Agency from 2009-08-17 to 2012-02-25 at the Ohio Valley Educational Service Center in Marietta, Ohio (39.443477 , -81.452199). The variables of interest were the amount of manganese and lead in the air measured as PM10 particle size. The visualizations were created from monthly averages for the concentration of airborne manganese The data was collected using the TO-15 collection systems for air monitoring device. (reference - https://www3.epa.gov/air/sat/pdfs/VocTechdocwithappendix1209.pdf) The files included are: The raw data - Marietta_OhioValleyEducationalServiceCenter_Raw.csv . Aggregated monthly averages of the raw data - Marietta_OhioValleyEducationalServiceCenter_Processed.csv. How the raw data are processed into monthly averages - Marietta_OhioValleyEducationalServiceCenter_WorkingFile.xlsx. How the video is generated- Marietta_OhioValleyEducationalServiceCenter.ppt. Video - Marietta_OhioValleyEducationalServiceCenter - generated from Marietta_OhioValleyEducationalServiceCenter.ppt.
- Creator/Author:
- Yao, Zhiyuan; Hilbert, Tim, and Haynes, Erin
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 10/27/2018
- Date Modified:
- 07/11/2019
- Date Created:
- 2009-08-17 to 2012-02-25
- License:
- CC0 1.0 Universal
- Type:
- Dataset
- Description/Abstract:
- This data set and accompanying files represents air monitoring data collected by the Environmental Protection Agency from 2009-08-12 to 2012-01-28 at the East Liverpool East Elementary School, in East Liverpool, Ohio (40.635093 , -80.545558). The variables of interest were the amount of manganese and lead in the air measured as PM10 particle size. The visualizations were created from monthly averages for the concentration of airborne manganese. The data was collected using the TO-15 collection systems for air monitoring device. (reference - https://www3.epa.gov/air/sat/pdfs/VocTechdocwithappendix1209.pdf) The files included are: The raw data - EastLiverpoolEastElementarySchool_Raw.csv . Aggregated monthly averages of the raw data - EastLiverpoolEastElementarySchool_Processed.csv. How the raw data are processed into monthly averages - Marietta_EastLiverpoolEastElementarySchool_WorkingFile.xlsx. How the video is generated- EastLiverpoolEastElementarySchool.ppt. Video - EastLiverpoolEastElementarySchool- generated from EastLiverpoolEastElementarySchool.ppt.
- Creator/Author:
- Yao, Zhiyuan; Hilbert, Tim, and Haynes, Erin
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 10/27/2018
- Date Modified:
- 07/11/2019
- Date Created:
- 2009-08-12 to 2012-01-28
- License:
- CC0 1.0 Universal
- Type:
- Dataset
- Description/Abstract:
- This data set and accompanying files represents air monitoring data collected by the Environmental Protection Agency from 2009-08-12 to 2012-01-28 at the East Liverpool Water Treatment Plant, in East Liverpool, Ohio (40.639501 , -80.523561). The variables of interest were the amount of manganese and lead in the air measured as PM10 particle size. The visualizations were created from monthly averages for the concentration of airborne manganese The data was collected using the TO-15 collection systems for air monitoring device. (reference - https://www3.epa.gov/air/sat/pdfs/VocTechdocwithappendix1209.pdf) The files included are: The raw data - EastLiverpool_WaterTreatmentPlant_Raw.csv . Aggregated monthly averages of the raw data - EastLiverpool_WaterTreatmentPlant_Processed.csv. How the raw data are processed into monthly averages - Marietta_EastLiverpool_WaterTreatmentPlant_WorkingFile.xlsx. How the video is generated- EastLiverpool_WaterTreatmentPlant.ppt. Video - EastLiverpool_WaterTreatmentPlant- generated from EastLiverpool_WaterTreatmentPlant.ppt.
- Creator/Author:
- Yao, Zhiyuan; Hilbert, Tim, and Haynes, Erin
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 10/27/2018
- Date Modified:
- 07/11/2019
- Date Created:
- 2009-01 to 2018-04
- License:
- CC0 1.0 Universal
- Type:
- Student Work
- Description/Abstract:
- Summary: The diagnosis of sarcoidosis is made by the combination of clinical features and biopsy results. The clinical features of sarcoidosis can be quite variable. We developed a Sarcoidosis Diagnostic Score (SDS) to summarize the clinical features of possible sarcoidosis patients. Biopsy confirmed sarcoidosis patients seen during a seven-month time period at the University of Cincinnati Sarcoidosis clinic were prospectively identified. Non-sarcoidosis patients seen at the same clinic were used as controls. Using a modified WASOG organ assessment instrument, we scored all patients for presence of biopsy, one or more highly probable symptom, and one or more at least probable symptom for each area. Two sarcoidosis scores were generated: SDS biopsy (with biopsy) and SDS clinical (without biopsy).The 980 evaluable patients were divided into two cohorts: an initial 600 patients (450 biopsy confirmed sarcoidosis, 150 controls) to establish cut-off values for SDS biopsy and SDS clinical and a validation cohort of 380 patients (103 biopsy confirmed sarcoidosis patients and 277 controls). The best cutoff value for SDS biopsy was > 6 (sensitivity =99.3%; specificity=100%). For the total the 980 patients, an SDS clinical > 3 had a sensitivity of 94.2%, specificity of 88.8%, and a likelihood ratio of 7.9. An SDS clinical score > 4 had a lower sensitivity of (76.9%) but higher specificity (98.6%). For sarcoidosis, the presence of specific clinical features, especially multi-organ involvement, can enhance the diagnostic certainty. The SDS scoring system quantitated the clinical features consistent with sarcoidosis. Awards/Publications: Published in CHEST Journal 2018 Oral presentation at the 2018 American Thoracic Society Conference
- Creator/Author:
- Lower, Elyse E., M.D.; Baughman, Robert P., M.D., and Bickett, Alexandra
- Submitter:
- Alexandra Bickett
- Date Uploaded:
- 05/24/2018
- Date Modified:
- 05/24/2018
- Date Created:
- 2018-04-15
- License:
- Attribution-ShareAlike 4.0 International
10. ELISA_QC
- Type:
- Student Work
- Description/Abstract:
- This program is meant to batch process ELISA standard curve data to generate Levey-Jennings control charts and report values that fall outisde of 2 and 3 standard deviations of the mean. The Instruction Manual contains a detailed guide on usage.
- Creator/Author:
- Wetzel, Hanna
- Submitter:
- Hanna Wetzel
- Date Uploaded:
- 04/21/2017
- Date Modified:
- 04/21/2017
- License:
- All rights reserved
- Type:
- Dataset
- Description/Abstract:
- ABSTRACT Helicobacter pylori (H. pylori) is the major risk factor for the development of gastric cancer. Our laboratory has reported that the Sonic Hedgehog (Shh) signaling pathway is an early response to infection that is fundamental to the initiation of H. pylori-induced gastritis. H. pylori also induces programmed death ligand 1 (PD-L1) expression on gastric epithelial cells, yet the mechanism is unknown. We hypothesize that H. pylori-induced PD-L1 expression within the gastric epithelium is mediated by the Shh signaling pathway during infection. To identify the role of Shh signaling as a mediator of H. pylori-induced PD-L1 expression, human gastric organoids generated from either induced pluripotent stem cells (HGOs) or tissue (huFGOs) were microinjected with bacteria and treated with Hedgehog/Gli inhibitor GANT61. Gastric epithelial monolayers generated from the huFGOs were also infected with H. pylori and treated with GANT61 to study the role of Hedgehog signaling as a mediator of induced PD-1 expression. A patient-derived organoid/autologous immune cell co-culture system infected with H. pylori and treated with PD-1 inhibitor (PD-1Inh) was developed to study the protective mechanism of PD-L1 in response to bacterial infection. H. pylori significantly increased PD-L1 expression in organoid cultures 48 hours post-infection when compared to uninfected controls. The mechanism was cytotoxic associated gene A (CagA) dependent. This response was blocked by pretreatment with GANT61. Anti-PD-L1 treatment of H. pylori infected huFGOs, co-cultured with autologous patient cytotoxic T lymphocytes and dendritic cells, induced organoid death. H. pylori-induced PD-L1 expression is mediated by the Shh signaling pathway within the gastric epithelium. Cells infected with H. pylori that express PD-L1 may be protected from the immune response, creating premalignant lesions progressing to gastric cancer.
- Creator/Author:
- Zavros, Yana
- Submitter:
- Yana Zavros
- Date Uploaded:
- 12/21/2018
- Date Modified:
- 12/21/2018
- Date Created:
- License:
- All rights reserved
- Type:
- Document
- Description/Abstract:
- This talk was the second panelist in the Health Equities and Disparities Session for the 4th Annual UC Data Day Conference hosted by UC Libraries. Tammy Mentzel, MPH, Assistant Director for Programs and Projects, University of Cincinnati, Academic Health Center, Cincinnati Cancer Center Talk Title(s): Understanding Health Disparities and Perceptions of Discrimination in Greater Cincinnati Tammy served as the Program Director for the Transformation of Mission-based Health Care through Diversity, Equity, and Inclusion project aimed at bolstering diversity in the health care workforce and eliminating health disparities in urban communities by identifying, testing and adopting evidence-based strategies and tools. Tammy was formerly in the College of Nursing at UC where she was a Research Associate and Program Director providing leadership and support on six funded research projects totaling over $4.6 million.
- Creator/Author:
- Mentzel, Tammy
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 04/12/2019
- Date Modified:
- 04/12/2019
- Date Created:
- 2019-04-01
- License:
- Attribution-NonCommercial 4.0 International
- Type:
- Document
- Description/Abstract:
- This presentation represents Panelists 3 and 4 as a joint presentation and This talk was the third panelist in the Health Equities and Disparities Session for the 4th Annual UC Data Day Conference hosted by UC Libraries. Joint Talk with Dr. Pickle and Stef Murwsky – Title: Developing Best Practices to Address LGBTQ and Health Disparities Sarah Pickle, MD (she/her/hers), Associate Professor, University of Cincinnati Department of Family and Community Medicine. Dr. Pickle and her colleagues are studying best practices for training future generations of health care professionals in transgender medicine. University of Cincinnati College of Medicine is one of the only US Medical Schools to have a nationally published, dedicated transgender medicine curriculum. Stef Murawsky, MA, WGSS, Ph.D. Candidate, Sociology Pronouns: they/them/theirs University of Cincinnati Department of Sociology I am currently completing a qualitative dissertation that explores transgender patient experiences of navigating and managing a stigmatized gender identity in biomedical contexts. I plan to generate a critical analysis of stigma in healthcare that demonstrates how structural, interpersonal and individual level transgender healthcare experiences are gendered and racialized.
- Creator/Author:
- Murawsky, Stef and Pickel, Sara
- Submitter:
- Amy Koshoffer
- Date Uploaded:
- 04/12/2019
- Date Modified:
- 04/12/2019
- Date Created:
- 2019-04-01
- License:
- Attribution-NonCommercial 4.0 International
- Type:
- Article
- Description/Abstract:
- Candida albicans is a leading pathogen in infections of central venous catheters, which are frequently infused with heparin. Binding of C. albicans to medically relevant concentrations of soluble and plate-bound heparin was demonstrable by confocal microscopy and enzyme-linked immunosorbent assay (ELISA). A sequencebased search identified 34 C. albicans surface proteins containing ≥1 match to linear heparin-binding motifs. The virulence factor Int1 contained the most putative heparin-binding motifs (n = 5); peptides encompassing 2 of 5 motifs bound to heparin-Sepharose. Alanine substitution of lysine residues K805/K806 in 804QKKHQIHK811 (motif 1 of Int1) markedly attenuated biofilm formation in central venous catheters in rats, whereas alanine substitution of K1595/R1596 in 1593FKKRFFKL1600 (motif 4 of Int1) did not impair biofilm formation. Affinity-purified immunoglobulin G (IgG) recognizing motif 1 abolished biofilm formation in central venous catheters; preimmune IgG had no effect. After heparin treatment of C. albicans, soluble peptides from multiple C. albicans surface proteins were detected, such as Eno1, Pgk1, Tdh3, and Ssa1/2 but not Int1, suggesting that heparin changes candidal surface structures and may modify some antigens critical for immune recognition. These studies define a new mechanism of biofilm formation for C. albicans and a novel strategy for inhibiting catheter-associated biofilms.
- Creator/Author:
- Andes, David R.; Lu, Jason Long; Tan, Queenie K., G.; Hostetter, Margaret K.; Greis, Kenneth D.; Zhang, Minlu; Orsborn, Kris I.; Porollo, Alexey, and Green, Julianne V.
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/03/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2013-07
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- OBJECTIVE: Damage to hair from UV exposure has been well reported in the literature and is known to be a highly complex process involving initiation via absorption of UV light followed by formation and propagation of reactive oxygen species (ROS). The objective of this work was to understand these mechanisms, explain the role of copper in accelerating the formation of ROS and identify strategies to reduce the hair damage caused by these reactive species. METHODS: The location of copper in hair was measured by Transmission electron microscopy–(TEM) X-ray energy dispersive spectroscopy (XEDS) and levels measured by ICP-OES. Protein changes were measured as total protein loss via the Lowry assay, and MALDI ToF was used to identify the biomarker protein fragments. TBARS assay was used to measure lipid peroxide formation. Sensory methods and dry combing friction were used to measure hair damage due to copper and UV exposure and to demonstrate the efficacy of N,N’ ethylenediamine disuccinic acid (EDDS) and histidine chelants to reduce this damage. RESULTS: In this work, a biomarker protein fragment formed during UV exposure is identified using mass spectrometry. This fragment originates from the calcium-binding protein S100A3. Also shown is the accelerated formation of this peptide fragment in hair containing low levels of copper absorbed from hair during washing with tap water containing copper ions. Transmission electron microscopy (TEM) X-ray energy dispersive spectroscopy (XEDS) studies indicate copper is located in the sulphur-poor endo-cuticle region, a region where the S100A3 protein is concentrated. A mechanism for formation of this peptide fragment is proposed in addition to the possible role of lipids in UV oxidation. A shampoo and conditioner containing chelants (EDDS in shampoo and histidine in conditioner) is shown to reduce copper uptake from tap water and reduce protein loss and formation of S100A3 protein fragment. In addition, the long-term consequences of UV oxidation and additional damage induced by copper are illustrated in a fourmonth wear study where hair was treated with a consumer relevant protocol of hair colouring treatments, UV exposure and regular shampoo and conditioning. CONCLUSIONS: The role of copper in accelerating UV damage to hair has been demonstrated as well as the ability of chelants such as EDDS and histidine in shampoo and conditioner products to reduce this damage.
- Creator/Author:
- McComb, D. W.; Marsh, J. M.; Sun, Y.; Chaudhary, T.; Flagler, M. J.; Coderch, L.; Mamak, M.; Greis, Kenneth D.; Rubio, L.; Williams, R. E. A., and Davis, M. G.
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/03/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2015-04
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- Commonly used methods for isolated enzyme inhibitor screening typically rely on fluorescent or chemiluminescent detection techniques that are often indirect and/or coupled assays. Mass spectrometry (MS) has been widely reported for measuring the conversion of substrates to products for enzyme assays and has more recently been demonstrated as an alternative readout system for inhibitor screening. In this report, a high-throughput mass spectrometry (HTMS) readout platform, based on the direct measurement of substrate conversion to product, is presented. The rapid ionization and desorption features of a new generation matrix-assisted laser desorption ionization-triple quadrupole (MALDI-QqQ) mass spectrometer are shown to improve the speed of analysis to greater than 1 sample per second while maintaining excellent Z′ values. Furthermore, the readout was validated by demonstrating the ability to measure IC50 values for several known kinase inhibitors against cyclic AMP–dependent protein kinase (PKA). Finally, when the assay performance was compared with a common ADPaccumulation readout system, this HTMS approach produced better signal-to-background ratios, higher Z′ values, and a reagent cost of about $0.03 per well compared with about $0.60 per well for the fluorescence assay. Collectively, these data demonstrate that a MALDI-QqQ-MS–based readout platform offers significant advantages over the commonly used assays in terms of speed, sensitivity, reproducibility, and reagent cost. (Journal of Biomolecular Screening 2008:1007-1013)
- Creator/Author:
- Rathore, Rakesh; Corr, Jay; Scott, George; Greis, Kenneth D., and Vollmerhaus, Pauline
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/03/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2008-12
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- The primary structure of the major surface glycoconjugate of Leishmania donovani parasites, a lipophosphoglycan, has been further characterized. The repeating PO4-6Galp beta 1-4Man disaccharide units, which are a salient feature of the molecule, are shown to terminate with one of several neutral structures, the most abundant of which is the branched trisaccharide Galp beta 1-4(Manp alpha 1-2)Man. The phosphosaccharide core of lipophosphoglycan, which links the disaccharide repeats to a lipid anchor, contains 2 phosphate residues. One of the core phosphates has previously been localized on O-6 of the galactosyl residue distal to the lipid anchor; the second phosphate is now shown to be on O-6 of the mannosyl residue distal to the anchor and to bear an alpha-linked glucopyranosyl residue. Also, the anomeric configuration of the unusual 3-substituted Galf residue in the phosphosaccharide core is established as beta. The complete structure of the core is thus PO4-6Galp alpha 1-6Galp alpha 1-3Galf beta 1-3[Glcp alpha 1-PO4-6]Manp alpha 1-3Manp alpha 1-4GlcN alpha 1-. This further clarification of the structure of lipophosphoglycan may prove beneficial in determining the structure-function relationships of this highly unusual glycoconjugate.
- Creator/Author:
- Ferguson, Michael A. J.; Turco, Salvatore J.; Thomas, Jerry R.; Gorin, Philip A. J.; Homans, Steven W.; McConville, Malcom J.; Greis, Kenneth D., and Thomas-Oates, Jane E.
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/01/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 1992-05
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- Cardiolipin (CL) is a mitochondrial phospholipid essential for electron transport chain (ETC) integrity. CL-deficiency in humans is caused by mutations in the tafazzin (Taz) gene and results in a multisystem pediatric disorder, Barth syndrome (BTHS). It has been reported that tafazzin deficiency destabilizes mitochondrial respiratory chain complexes and affects supercomplex assembly. The aim of this study was to investigate the impact of Taz-knockdown on the mitochondrial proteomic landscape and metabolic processes, such as stability of respiratory chain supercomplexes and their interactions with fatty acid oxidation enzymes in cardiac muscle. Proteomic analysis demonstrated reduction of several polypeptides of the mitochondrial respiratory chain, including Rieske and cytochrome c1 subunits of complex III, NADH dehydrogenase alpha subunit 5 of complex I and the catalytic core-forming subunit of F0F1-ATP synthase. Taz gene knockdown resulted in upregulation of enzymes of folate and amino acid metabolic pathways in heart mitochondria, demonstrating that Tazdeficiency causes substantive metabolic remodeling in cardiac muscle. Mitochondrial respiratory chain supercomplexes are destabilized in CL-depleted mitochondria from Taz knockdown hearts resulting in disruption of the interactions between ETC and the fatty acid oxidation enzymes, very long-chain acyl-CoA dehydrogenase and long-chain 3-hydroxyacylCoA dehydrogenase, potentially affecting the metabolic channeling of reducing equivalents between these two metabolic pathways. Mitochondria-bound myoglobin was significantly reduced in Taz-knockdown hearts, potentially disrupting intracellular oxygen delivery to the oxidative phosphorylation system. Our results identify the critical pathways affected by the Taz-deficiency in mitochondria and establish a future framework for development of therapeutic options for BTHS.
- Creator/Author:
- Haffey, Wendy D.; Mandala, Satish K.; Purevjav, Enkhsalkhan; Huang, Yan; Javadov, Sabzali; Greis, Kenneth D.; Powers, Corey; Strauss, Arnold W.; Towbin, Jeffrey A., and Khuchua, Zaza
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/03/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2015-06
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- Background: Role of apolipoprotein (apo) A-II on metabolism of high density lipoproteins (HDLs) is unknown. Results: Conformational changes of apoA-I, the major apolipoprotein of HDL, caused by apoA-II in discoidal HDL are confined to two regions of apoA-I. Conclusion: Interactions between the two major apolipoproteins in discoidal HDL are site specific. Significance: Functional implications of HDL complexes will significantly benefit from such structural information.
- Creator/Author:
- Gauthamadasa, Kekulawalage; Vaitinadin, Nataraja Sarma; Homan, Reyn; Macha, Stephen; Dresman, James L.; D. Silva, R. A. Gangani, and Greis, Kenneth D.
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/01/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2012-03
- License:
- All rights reserved
- Type:
- Article
- Description/Abstract:
- Cardiac myosin binding protein-C (cMyBP-C) is a thick filament assembly protein that stabilizes sarcomeric structure and regulates cardiac function; however, the profile of cMyBP-C degradation after myocardial infarction (MI) is unknown. We hypothesized that cMyBP-C is sensitive to proteolysis and is specifically increased in the bloodstream post-MI in rats and humans. Under these circumstances, elevated levels of degraded cMyBP-C could be used as a diagnostic tool to confirm MI. To test this hypothesis, we first established that cMyBP-C dephosphorylation is directly associated with increased degradation of this myofilament protein, leading to its release in vitro. Using neonatal rat ventricular cardiomyocytes in vitro, we were able to correlate the induction of hypoxic stress with increased cMyBP-C dephosphorylation, degradation, and the specific release of N′-fragments. Next, to define the proteolytic pattern of cMyBP-C post-MI, the left anterior descending coronary artery was ligated in adult male rats. Degradation of cMyBP-C was confirmed by a reduction in total cMyBP-C and the presence of degradation products in the infarct tissue. Phosphorylation levels of cMyBP-C were greatly reduced in ischemic areas of the MI heart compared to non-ischemic regions and sham control hearts. Post-MI plasma samples from these rats, as well as humans, were assayed for cMyBP-C and its fragments by sandwich ELISA and immunoprecipitation analyses. Results showed significantly elevated levels of cMyBP-C in the plasma of all post-MI samples. Overall, this study suggests that cMyBP-C is an easily releasable myofilament protein that is dephosphorylated, degraded and released into the circulation post-MI. The presence of elevated levels of cMyBP-C in the blood provides a promising novel biomarker able to accurately rule in MI, thus aiding in the further assessment of ischemic heart disease.
- Creator/Author:
- Muthusamy, Saminathan; Nair, Nandini; McElligott, Andrew; Martin, Jody L.; Govindan, Suresh; Gongora, Enrique; henderson, Kyle K.; Greis, Kenneth D.; Barefield, David; Luther, Pradeep K.; Sadayappan, Sakthivel, and Winegrad, Saul
- Submitter:
- Kenneth Greis
- Date Uploaded:
- 03/03/2017
- Date Modified:
- 04/07/2017
- Date Created:
- 2012-01
- License:
- All rights reserved
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