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Blanke L, Zinsmeister L, Schnell S, Steinhorst K, Lämmer R, Michelson G. Improving Glaucoma Patients' Quality of Life and Adherence With a Digital Health Application: [RETRACTED]. J Glaucoma 2023:00061198-990000000-00325. [PMID: 38129946 DOI: 10.1097/ijg.0000000000002349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/26/2023] [Indexed: 12/23/2023]
Abstract
PRCIES Empowering glaucoma patients to access their individual glaucoma related health data by using a digital health application leads to a significant improvement in quality of life and adherence. PURPOSE Evaluate the effectiveness of improvement of glaucoma associated quality of life and adherence in patients using a digital health application. PATIENTS AND METHODS A prospective randomized monocentric controlled study of 77 patients with primary open angle glaucoma. Patients were recruited at the University Hospital Erlangen. Patients in the intervention group tracked their intraocular pressure, symptoms and therapy using a digital application. Based on the collected data the SmartTonoTracker® gave patients simple statistics and basic recommendations for further treatment. An increasing score on the GlauQol-36 item questionnaire and the MMAS-8 score, conducted at baseline and follow-up by the intervention group, was considered successful. Statistical analysis was conducted using the unpaired t-test, paired t-test, Man-Whitney-U test, frequency analysis, frequency distribution and Pearson-correlation. RESULTS Significant difference in the patients´ glaucoma-associated quality of life between the intervention group (rate of improvement: 7.6%, P =0.047), and the control group (rate of improvement: 0.17%, P =0.047) was shown. Also, a significant difference in adherence between the intervention group, showing a 9.8% rate of improvement ( P =0.002), and the control group, showing a 3.8% rate of improvement ( P =0.002), was shown. CONCLUSION Enabling patients to access individual health related glaucoma data by using a digital health application and supporting them with information on their disease led to an improvement in glaucoma-associated quality of life and adherence.
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Shankar TS, Anandamurugan Ramadurai DK, Steinhorst K, Sommakia S, Badolia R, THODOU KROKIDI ASPASIASPYRIDOULA, Calder D, Navankasattusas S, Ling J, Kwon O, Cheng E, Richardson R, Sachse FB, Schredelseker J, Spitzer K, Chaudhuri D, Drakos SG. Abstract P467: Cardiac-specific Deletion Of Voltage Dependent Anion Channel 2 Leads To Dilated Cardiomyopathy By Altering Calcium Homeostasis. Circ Res 2021. [DOI: 10.1161/res.129.suppl_1.p467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Voltage dependent anion channel 2 (VDAC2) is a mitochondrial outer membrane porin known to play a significant role in apoptosis and calcium signaling. Abnormalities in cellular calcium homeostasis often leads to electrical and contractile dysfunction and can cause dilated cardiomyopathy and heart failure. Previous literature suggests that improving mitochondrial calcium uptake via VDAC2 rescues arrhythmia phenotypes in genetic models of impaired cellular calcium signaling. However, the direct role of VDAC2 in intracellular calcium signaling and cardiac function is not well understood. To elucidate the role of VDAC2 in calcium homeostasis, we generated a cardiac-specific deletion of
Vdac2
in mice. Our results indicate that loss of VDAC2 in the myocardium during development causes severe impairment in excitation-contraction coupling by reducing mitochondrial calcium uptake (n=3, p<0.05) and thereby impairing intracellular calcium signaling. VDAC2 knock-out mice showed a significant reduction in RYR-mediated calcium release (F/F
0
) and rate of calcium uptake by SERCA2a [tau(msec)] compared to control mice (N=3, WT=54, KO=38, p<0.0001 (F/F
0
) and p<0.05 (tau)). We also observed adverse cardiac remodeling which progressed to severe dilated cardiomyopathy and death (N=6, p<0.0001). Reintroducing VDAC2 in 6-week-old knock-out mice partially rescued the cardiomyopathy phenotype evident from improvement in ejection fraction and fractional shortening (n=3, p<0.05). Improving mitochondrial calcium uptake via VDAC2 using a VDAC2 agonist efsevin, increased cardiac contractile force in a mouse model of pressure-overload induced heart failure (N=8, n=22, p<0.05). In conclusion, our findings demonstrate that VDAC2 plays a crucial role in cardiac function by influencing mitochondrial and cellular calcium signaling. Through this role in cellular calcium dynamics and excitation-contraction coupling VDAC2 emerges as a plausible therapeutic target for heart failure.
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Shankar TS, Ramadurai DKA, Steinhorst K, Sommakia S, Badolia R, Thodou Krokidi A, Calder D, Navankasattusas S, Sander P, Kwon OS, Aravamudhan A, Ling J, Dendorfer A, Xie C, Kwon O, Cheng EHY, Whitehead KJ, Gudermann T, Richardson RS, Sachse FB, Schredelseker J, Spitzer KW, Chaudhuri D, Drakos SG. Cardiac-specific deletion of voltage dependent anion channel 2 leads to dilated cardiomyopathy by altering calcium homeostasis. Nat Commun 2021; 12:4583. [PMID: 34321484 PMCID: PMC8319341 DOI: 10.1038/s41467-021-24869-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/06/2021] [Indexed: 12/13/2022] Open
Abstract
Voltage dependent anion channel 2 (VDAC2) is an outer mitochondrial membrane porin known to play a significant role in apoptosis and calcium signaling. Abnormalities in calcium homeostasis often leads to electrical and contractile dysfunction and can cause dilated cardiomyopathy and heart failure. However, the specific role of VDAC2 in intracellular calcium dynamics and cardiac function is not well understood. To elucidate the role of VDAC2 in calcium homeostasis, we generated a cardiac ventricular myocyte-specific developmental deletion of Vdac2 in mice. Our results indicate that loss of VDAC2 in the myocardium causes severe impairment in excitation-contraction coupling by altering both intracellular and mitochondrial calcium signaling. We also observed adverse cardiac remodeling which progressed to severe cardiomyopathy and death. Reintroduction of VDAC2 in 6-week-old knock-out mice partially rescued the cardiomyopathy phenotype. Activation of VDAC2 by efsevin increased cardiac contractile force in a mouse model of pressure-overload induced heart failure. In conclusion, our findings demonstrate that VDAC2 plays a crucial role in cardiac function by influencing cellular calcium signaling. Through this unique role in cellular calcium dynamics and excitation-contraction coupling VDAC2 emerges as a plausible therapeutic target for heart failure.
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Affiliation(s)
- Thirupura S Shankar
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Dinesh K A Ramadurai
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Kira Steinhorst
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Salah Sommakia
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Rachit Badolia
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Aspasia Thodou Krokidi
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Dallen Calder
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Sutip Navankasattusas
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Paulina Sander
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Oh Sung Kwon
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
- Geriatric Research, Education, and Clinical Center, Salt Lake City VA Medical Center, Salt Lake City, UT, USA
| | - Aishwarya Aravamudhan
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Jing Ling
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Andreas Dendorfer
- Walter-Brendel-Center of Experimental Medicine, Ludwig-Maximilians Universität Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Changmin Xie
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | | | - Kevin J Whitehead
- Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Russel S Richardson
- Geriatric Research, Education, and Clinical Center, Salt Lake City VA Medical Center, Salt Lake City, UT, USA
| | - Frank B Sachse
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Johann Schredelseker
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Kenneth W Spitzer
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Dipayan Chaudhuri
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Stavros G Drakos
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA.
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
- Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA.
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Kleemann J, Hrgovic I, Kleimann P, Ter-Nedden J, Glaser M, Steinhorst K, Härle K, Müller J, Kaufmann R, Kippenberger S, Meissner M. G protein-coupled receptor 40 expression in human melanoma - correlation with tumour thickness, AJCC stage and survival. J Eur Acad Dermatol Venereol 2019; 34:285-292. [PMID: 31465594 DOI: 10.1111/jdv.15924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 07/25/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND In melanoma, preclinical data suggest a possible role of polyunsaturated fatty acids inhibiting cell growth. A new target molecule for free fatty acids, the G protein-coupled receptor GPR40, was identified in melanoma cells. OBJECTIVES The aim of this study was to investigate GPR40 expression in human melanocytic tissues and to evaluate its potential as a prognostic marker. METHODS AND RESULTS A total of 114 tissue sections of naevi, primary melanoma and melanoma metastasis were immunohistochemically stained with anti-GPR40. The staining was evaluated, using the immunoreactivity scoring system. Compared to naevi, primary melanoma and melanoma metastasis showed significantly higher levels of GPR40 (P < 0.05). In primary melanoma, GPR40 expression positively correlated with tumour thickness (P = 0.044) and AJCC level (P = 0.017) and in melanoma metastasis with AJCC level (P = 0.035). Primary melanoma patients with high levels of GPR40 had a significantly poorer overall survival (P = 0.004) and shorter disease-free survival (0.040). CONCLUSION The present study identified GPR40 as a novel target molecule in melanoma. First evidence for a potential role of the receptor in tumour progression and metastases was found, and it could be demonstrated that GPR40 expression is negatively correlated with patient's survival.
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Affiliation(s)
- J Kleemann
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - I Hrgovic
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - P Kleimann
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - J Ter-Nedden
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - M Glaser
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - K Steinhorst
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - K Härle
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - J Müller
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - R Kaufmann
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - S Kippenberger
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
| | - M Meissner
- Department of Dermatology, Venereology and Allergy, Goethe University Hospital, Frankfurt/Main, Germany
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