Publications by authors named "Changming Tan"

6 Publications

  • Page 1 of 1

Cardiolipin Remodeling Defects Impair Mitochondrial Architecture and Function in a Murine Model of Barth Syndrome Cardiomyopathy.

Circ Heart Fail 2021 Jun 15;14(6):e008289. Epub 2021 Jun 15.

Department of Medicine (S.Z., Z.C., M.Z., S.S., C.T., Y.G., A.N., W.F., S.M.E., X.F.), University of California, San Diego, La Jolla.

Background: Cardiomyopathy is a major clinical feature in Barth syndrome (BTHS), an X-linked mitochondrial lipid disorder caused by mutations in (), encoding a mitochondrial acyltransferase required for cardiolipin remodeling. Despite recent description of a mouse model of BTHS cardiomyopathy, an in-depth analysis of specific lipid abnormalities and mitochondrial form and function in an in vivo BTHS cardiomyopathy model is lacking.

Methods: We performed in-depth assessment of cardiac function, cardiolipin species profiles, and mitochondrial structure and function in our newly generated cardiomyocyte-specific knockout mice and Cre-negative control mice (n≥3 per group).

Results: cardiomyocyte-specific knockout mice recapitulate typical features of BTHS and mitochondrial cardiomyopathy. Fewer than 5% of cardiomyocyte-specific knockout mice exhibited lethality before 2 months of age, with significantly enlarged hearts. More than 80% of cardiomyocyte-specific knockout displayed ventricular dilation at 16 weeks of age and survived until 50 weeks of age. Full parameter analysis of cardiac cardiolipin profiles demonstrated lower total cardiolipin concentration, abnormal cardiolipin fatty acyl composition, and elevated monolysocardiolipin to cardiolipin ratios in Taz cardiomyocyte-specific knockout, relative to controls. Mitochondrial contact site and cristae organizing system and F1F0-ATP synthase complexes, required for cristae morphogenesis, were abnormal, resulting in onion-shaped mitochondria. Organization of high molecular weight respiratory chain supercomplexes was also impaired. In keeping with observed mitochondrial abnormalities, seahorse experiments demonstrated impaired mitochondrial respiration capacity.

Conclusions: Our mouse model mirrors multiple physiological and biochemical aspects of BTHS cardiomyopathy. Our results give important insights into the underlying cause of BTHS cardiomyopathy and provide a framework for testing therapeutic approaches to BTHS cardiomyopathy, or other mitochondrial-related cardiomyopathies.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1161/CIRCHEARTFAILURE.121.008289DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8210459PMC
June 2021

Loss of Filamin C Is Catastrophic for Heart Function.

Circulation 2020 03 9;141(10):869-871. Epub 2020 Mar 9.

Departments of Medicine-Cardiology (Y.Z., Z.C., L.Z., M.Z., C.T., S.M.E., X.F., W.F., J.C.), University of California San Diego, La Jolla.

View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1161/CIRCULATIONAHA.119.044061DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7583669PMC
March 2020

A Giant Cavernous Hemangioma of the Left Atrioventricular Groove.

Case Rep Pediatr 2017 20;2017:6898629. Epub 2017 Mar 20.

Department of the Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Middle Renmin Road 139, Changsha 410011, China.

A 10-year-old Chinese female diagnosed with an asymptomatic giant cardiac cavernous hemangioma was reported. The patient originally tended to observation because this unusual cardiac tumoral mass was discovered incidentally during routine health examination of transthoracic echocardiography. Over 5 years of follow-up, the mass had enlarged obviously, and the patient visited our outpatient clinic and was prone to excision. Subsequently, a total resection surgery of the tumor was performed, and the tumor was found to be located on the left atrioventricular groove with complete packing membrane. The patient was discharged on postoperative day 4 and remains asymptomatic on last follow-up.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1155/2017/6898629DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376948PMC
March 2017

Association Between the Left Atrial and Left Atrial Appendages Systole Strain Rate in Patients with Atrial Fibrillation.

Med Sci Monit 2016 Dec 18;22:4974-4977. Epub 2016 Dec 18.

Department of Cardiac Surgery, The Second Xiang-Ya Hospital, Central South University, Changsha, Hunan, China (mainland).

BACKGROUND The aim of this research was to explore the association between the left atrial (LA) and left atrial appendages (LAA) systole strain rate (SSR) in patients with atrial fibrillation (AF), and to provide evidence to aid in the assessment of disease progression. MATERIAL AND METHODS A total of 180 patients with AF were selected for the study (130 patients with paroxysmal AF (Par AF) and 50 patients with persistence AF (PerAF).In addition, 60 healthy individuals were selected as a control group. The total and side wall SSRs were calculated. RESULTS The total SSR in the control group was higher than in the ParAF and PerAF groups (2.87±0.45 vs. 2.15±0.56 vs. 1.92±0.62 and 6.24±1.61 vs. 4.45±1.42 vs. 3.66±1.55). The total SSR of LAA was correlated with that of LA in the AF patient groups and the control group; the correlation coefficients were 0.720, 0.563, and 0.421. However, the ratio of total SSR of LAA to that of LA was not significant statistically different among the three groups (2.24±0.41 vs. 2.35±0.58 vs. 2.03±0.56). The posterior wall had the lowest SSRs in the control group and ParAF group. CONCLUSIONS The SSRs of AF patients were lower than that of healthy individuals, and the degree was associated with disease progression. The SSR was different in different side walls, and gradually shorten with disease progression.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5198748PMC
http://dx.doi.org/10.12659/msm.901831DOI Listing
December 2016

Isolated cardiac peripheral primitive neuroectodermal tumor: A case report.

Cancer Biol Ther 2017 01 1;18(1):4-7. Epub 2016 Dec 1.

a Department of The Cardiovascular Surgery , The Second Xiangya Hospital, Central South University , Changsha , China.

Background: Peripheral primitive neuroectodermal tumor isolated in the heart, presenting as a primary cardiac tumor is considered as extremely rare.

Methods: We present a 53-year-old Chinese female with a cardiac tumor which was discovered by CT.

Results: A hypo-intense tumorous mass was shown extending from the left ventricle by Cardiac CT, and fused FDG positron emission tomography demonstrated no other abnormal FDG active lesions in the body. We performed a total resection surgery of the tumor subsequently and the patient recovered well and discharged from hospital 6 d after surgery.

Conclusion: The pathological diagnosis was primary cardiac peripheral primitive neuroectodermal tumor. No tumor recurrence was shown by echocardiography during the 24 months follow-up visits.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1080/15384047.2016.1264542DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5323009PMC
January 2017

The Relationship between Galectin-3 and Different Patterns of Ventricular Geometry Remodelling in Aortic Valve Stenosis.

Heart Lung Circ 2016 Apr 1;25(4):371-7. Epub 2015 Oct 1.

The Department of Cardiovascular Surgery of the 2nd XiangYa Hosptial, Central South University, Changsha, 410011, China. Electronic address:

Background: This study was conducted to assess expression of Galectin-3 (Gal-3) in patients with different types of left ventricle (LV) hypertrophy geometry, and the relationship between Gal-3 expression and LV remodelling in patients with aortic valve stenosis (AS).

Methods: Galectin-3 expression was measured in the plasma and myocardia of AS patients who underwent an aortic valve replacement procedure.

Results: The study enrolled 77 consecutive patients with severe AS. Fifty-five (71.43%) of the enrolled patients had concentric hypertrophy (CH group), and had the highest degree of fibrosis (27.10±5.25%; p<0.001) and expression of Gal-3 in both plasma (19.11±2.06 ng/mL) and myocardial tissue (3.01±0.79). There was a strong positive correlation between the levels of fibrosis and Gal-3 expression in both plasma (r=0.584, p<0.001) and myocardium (r=0.522, p<0.001). Relative wall thickness (RWT) was strongly correlated with Gal-3 expression in both myocardium (r=0.594, p<0.001) and plasma (r=0.323, p=0.005). Additionally, N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels were positively correlated with both fibrosis (r=0.313, p=0.036) and LV mass index (r=0.559, p<0.001).

Conclusions: Concentric hypertrophy geometry was the most common type of myocardium remodelling, and AS patients with CH geometry showed the highest levels of Gal-3 expression. Galectin-3 levels were positively correlated with fibrosis and RWT, both of which are crucial indicators of geometric remodelling. Galectin-3 and NT-proBNP levels may be valuable prognostic predictors in AS patients with myocardial remodelling.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.hlc.2015.08.021DOI Listing
April 2016
-->