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For: Kitpipatkun P, Yairo A, Kato K, Matsuura K, Ma D, Goya S, Uemura A, Takahashi K, Tanaka R. Effects of Individual and Coexisting Diabetes and Cardiomyopathy on Diastolic Function in Rats (Rattus norvegicus domestica). Comp Med 2020;70:499-509. [PMID: 33138891 DOI: 10.30802/aalas-cm-20-000042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]

For:	Kitpipatkun P, Yairo A, Kato K, Matsuura K, Ma D, Goya S, Uemura A, Takahashi K, Tanaka R. Effects of Individual and Coexisting Diabetes and Cardiomyopathy on Diastolic Function in Rats (Rattus norvegicus domestica). Comp Med 2020;70:499-509. [PMID: 33138891 DOI: 10.30802/aalas-cm-20-000042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]

Number

Cited by Other Article(s)

Farag A, Mandour AS, Kaneda M, Elfadadny A, Elhaieg A, Shimada K, Tanaka R. Effect of trehalose on heart functions in rats model after myocardial infarction: assessment of novel intraventricular pressure and heart rate variability. Front Cardiovasc Med 2023;10:1182628. [PMID: 37469485 PMCID: PMC10353053 DOI: 10.3389/fcvm.2023.1182628] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/09/2023] [Indexed: 07/21/2023] Open

Abstract

Background

Myocardial infarctions remain a leading cause of global deaths. Developing novel drugs to target cardiac remodeling after myocardial injury is challenging. There is an increasing interest in exploring natural cardioprotective agents and non-invasive tools like intraventricular pressure gradients (IVPG) and heart rate variability (HRV) analysis in myocardial infarctions. Trehalose (TRE), a natural disaccharide, shows promise in treating atherosclerosis, myocardial infarction, and neurodegenerative disorders.

Objectives

The objective of this study was to investigate the effectiveness of TRE in improving cardiac functions measured by IVPG and HRV and reducing myocardial remodeling following myocardial infarction in rat model.

Methods

Rats were divided into three groups: sham, myocardial infarction (MI), and trehalose-treated MI (TRE) groups. The animals in the MI and TRE groups underwent permanent ligation of the left anterior descending artery. The TRE group received 2% trehalose in their drinking water for four weeks after the surgery. At the end of the experiment, heart function was assessed using conventional echocardiography, novel color M-mode echocardiography for IVPG evaluation, and HRV analysis. After euthanasia, gross image scoring, histopathology, immunohistochemistry, and quantitative real-time PCR were performed to evaluate inflammatory reactions, oxidative stress, and apoptosis.

Results

The MI group exhibited significantly lower values in multiple IVPG parameters. In contrast, TRE administration showed an ameliorative effect on IVPG changes, with results comparable to the sham group. Additionally, TRE improved HRV parameters, mitigated morphological changes induced by myocardial infarction, reduced histological alterations in wall mass, and suppressed inflammatory reactions within the infarcted heart tissues. Furthermore, TRE demonstrated antioxidant, anti-apoptotic and anti-fibrotic properties.

Conclusion

The investigation into the effect of trehalose on a myocardial infarction rat model has yielded promising outcomes, as evidenced by improvements observed through conventional echocardiography, histological analysis, and immunohistochemical analysis. While minor trends were noticed in IVPG and HRV measurements. However, our findings offer valuable insights and demonstrate a correlation between IVPG, HRV, and other traditional markers of echo assessment in the myocardial infarction vs. sham groups. This alignment suggests the potential of IVPG and HRV as additional indicators for future research in this field.

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El-Husseiny HM, Mady EA, Ma D, Hamabe L, Takahashi K, Tanaka R. Intraventricular pressure gradient: A novel tool to assess the post-infarction chronic congestive heart failure. Front Cardiovasc Med 2022;9:944171. [PMID: 36051280 PMCID: PMC9425054 DOI: 10.3389/fcvm.2022.944171] [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: 05/14/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open

Abstract Congestive heart failure (CHF), the leading cause of death, is deemed a grave sequel of myocardial infarction (MI). The employment of left ventricular end-diastolic pressure (LVEDP), as a primary indication of CHF, becomes restricted owing to the potential impairment of heart function and caused injury to the aortic valve during its measurement. Echocardiography is the standard technique to detect cardiac dysfunction. However, it exhibits a low capacity to predict the progression of CHF post chronic MI. Being extremely sensitive, noninvasive, and preload-independent, intraventricular pressure gradient (IVPG) was lately introduced to evaluate cardiac function, specifically during cardiomyopathy. Yet, the utility of its use to assess the CHF progression after chronic MI was not investigated. Herein, in the current research, we aimed to study the efficacy of a novel echocardiographic-derived index as IVPG in the assessment of cardiac function in a chronic MI rat model with CHF. Fifty healthy male rats were involved, and MI was surgically induced in 35 of them. Six months post-surgery, all animals were examined using transthoracic conventional and color M-mode echocardiography (CMME) for IVPG. Animals were euthanized the following day after hemodynamics recording. Gross pathological and histological evaluations were performed. J-tree cluster analysis was conducted relying on ten echocardiographic parameters suggestive of CHF. Animals were merged into two main clusters: CHF+ (MI/HF + group, n = 22) and CHF– (n = 28) that was joined from Sham (n = 15), and MI/HF– (n = 13) groups. MI/HF+ group showed the most severe echocardiographic, hemodynamic, anatomic, and histologic alterations. There was no significant change in the total IVPG among various groups. However, the basal IVPG was significantly increased in MI/HF+ group compared to the other groups. The remaining IVPG measures were considerably increased in the MI/HF+ group than in the Sham one. The segmental IVPG measures were significantly correlated with the anatomical, histological, echocardiographic, and hemodynamic findings except for the heart rate. Moreover, they were significant predictors of CHF following a long-standing MI. Conclusively, IVPG obtained from CMME is a substantially promising noninvasive tool with a high ability to detect and predict the progression of CHF following chronic MI compared to conventional echocardiography. Collapse

Yairo A, Mandour AS, Matsuura K, Yoshida T, Ma D, Kitpipatkun P, Kato K, Cheng CJ, El-Husseiny HM, Tanaka T, Shimada K, Hamabe L, Uemura A, Takahashi K, Tanaka R. Effect of Loading Changes on the Intraventricular Pressure Measured by Color M-Mode Echocardiography in Rats. Diagnostics (Basel) 2021;11:1403. [PMID: 34441337 PMCID: PMC8391789 DOI: 10.3390/diagnostics11081403] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/28/2021] [Accepted: 07/31/2021] [Indexed: 02/06/2023] Open

Abstract

Evaluation of diastolic function is a pivotal challenge due to limitations of the conventional echocardiography, especially when the heart rate is rapid as in rats. Currently, by using color M-mode echocardiography (CMME), intraventricular pressure difference (IVPD) and intraventricular pressure gradient (IVPG) in early diastole can be generated and are available as echocardiographic indices. These indices are expected to be useful for the early diagnosis of heart failure (HF), especially diastolic dysfunction. There have not been any studies demonstrating changes in IVPD and IVPG in response to changes in loading conditions in rats. Therefore, the present study aims to evaluate CMME-derived IVPD and IVPG changes in rats under various loading conditions. Twenty rats were included, divided into two groups for two different experiments, and underwent jugular vein catheterization under inhalational anesthetics. Conventional echocardiography, CMME, and 2D speckle tracking echocardiography were measured at the baseline (BL), after intravenous infusion of milrinone (MIL, n = 10), and after the infusion of hydroxyethyl starch (HES, n = 10). Left ventricular IVPD and IVPG were calculated from color M-mode images and categorized into total, basal, mid-to-apical, mid, and apical parts, and the percentage of the corresponding part was calculated. In comparison to the BL, the ejection fraction, mid-to-apical IVPG, mid IVPG, and apical IVPD were significantly increased after MIL administration (p < 0.05); meanwhile, the end-diastolic volume, E-wave velocity, total IVPD, and basal IVPD were significantly increased with the administration of HES (p < 0.05). The increase in mid-to-apical IVPD, mid IVPD, and apical IVPD indicated increased relaxation. A significant increase in basal IVPD reflected volume overloading by HES. CMME-derived IVPD and IVPG are useful tools for the evaluation of various loading conditions in rats. The approach used in this study provides a model for continuous data acquisition in chronic cardiac disease models without drug testing.

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Affiliation(s)

Akira Yairo Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Ahmed S. Mandour Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.) Department of Animal Medicine (Internal Medicine), Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
Katsuhiro Matsuura Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Tomohiko Yoshida Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Danfu Ma Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Pitipat Kitpipatkun Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Konosuke Kato Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Chieh-Jen Cheng Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Hussein M. El-Husseiny Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.) Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya 13736, Egypt
Takashi Tanaka Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Kazumi Shimada Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Lina Hamabe Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)
Akiko Uemura Department of Veterinary Surgery, Division of Veterinary Research, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Hokkaido, Japan;
Ken Takahashi Department of Pediatrics and Adolescent Medicine, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan;
Ryou Tanaka Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan; (A.Y.); (K.M.); (T.Y.); (D.M.); (P.K.); (K.K.); (C.-J.C.); (H.M.E.-H.); (T.T.); (K.S.); (L.H.)

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