Related Experiment Video
Updated: Apr 8, 2026
Modeling and Evaluation of Murine Diabetic Cardiomyopathy Model
Published on: November 29, 2024
Diastolic dysfunction in spontaneous type 2 diabetes rhesus monkeys: a study using echocardiography and magnetic
Can Qian1,2, Li Gong3, Zunyuan Yang4
1Sichuan Industrial Institute of Antibiotics, Chengdu, China. qiancan8838@qq.com.
Background:
Diastolic heart failure is a common and deadly complication of diabetes mellitus, with the development of diabetic cardiomyopathy as one of the key determinants of the disease's complex pathology. The cause of the association is unknown and has no approved therapy strategies as of yet. However significant advances in this area may come from studies on suitable animal models.
Methods:
A total of 25 male rhesus monkeys (12-16 years, 9-13 kg) were enrolled. Fifteen of them were diagnosed as spontaneous type 2 diabetes mellitus (T2DM, FPG ≥ 104 mg/dl, HbA1c: 4.7-5.5 %, diabetes duration: 1-4 years). The other 10 monkeys were non-diabetic (ND, FPG < 90 mg/dl). Echocardiography and cardiac magnetic resonance were used for evaluating the cardiac structure and function. One T2DM monkey with impaired diastolic function and another ND monkey were both sacrificed to gain the necessary pathology and protein expression studies displayed here.
Results:
Six out of 15 T2DM rhesus monkeys were diagnosed with diastolic dysfunction (DD) by echocardiography. Additionally, no abnormalities were found in the group which we determined as the ND monkeys. The six DD monkeys all showed low e' velocity and decreased e'/a' ratio, among which three of them showing decreased E/A ratio and the other 3 having elevated E/A ratio, this appears to be similar to the impaired relaxation pattern and pseudonormal pattern found in human patients respectively. The EF and FS of monkeys with pseudonormal pattern decreased significantly compared with ND subjects. A CMR study showed that LVID at end systole of 5 DD monkeys is significantly longer than that of 3 ND monkeys. Of great interest, myocardium lesions and mitochondria impairments and increased expression of AGEs and caspase-3 were found in a sacrificed DD subject.
Conclusion:
The changes in the imaging and physiological markers of spontaneous T2DM rhesus monkeys are similar to those key markers found in human type 2 diabetes and diastolic dysfunction. This monkey model could help the medical community and us to understand the pathology of this debilitating disease and serve as a beginning to explore important measures to prevent and treat diabetic cardiomyopathy.
Insights
Diastolic dysfunction in spontaneous type 2 diabetes mellitus (T2DM) rhesus monkeys mirrors human conditions. This model offers insights into diabetic cardiomyopathy and potential therapeutic targets.
Area of Science:
- Cardiology
- Endocrinology
- Animal Models
Background:
- Diastolic heart failure is a severe complication of diabetes mellitus, linked to diabetic cardiomyopathy.
- The underlying causes and effective treatments for this condition remain largely unknown.
- Animal models are crucial for advancing understanding and developing therapies.
Purpose of the Study:
- To investigate cardiac structure and function in spontaneous type 2 diabetes mellitus (T2DM) rhesus monkeys.
- To establish a suitable animal model for studying diabetic cardiomyopathy and diastolic dysfunction.
- To explore potential pathological mechanisms contributing to diabetic heart disease.
Main Methods:
- Enrolled 25 male rhesus monkeys (15 T2DM, 10 non-diabetic).
- Utilized echocardiography and cardiac magnetic resonance imaging (CMR) for cardiac assessment.
- Performed pathological and protein expression studies on sacrificed animals.
Main Results:
- Six T2DM monkeys exhibited diastolic dysfunction (DD) with characteristic echocardiographic findings (low e' velocity, altered E/A ratios).
- CMR revealed increased left ventricular internal diameter (LVID) in DD monkeys.
- Pathology showed myocardial lesions, mitochondrial impairment, and increased AGEs and caspase-3 expression in a DD subject.
Conclusions:
- Spontaneous T2DM rhesus monkeys display imaging and physiological markers consistent with human diabetic cardiomyopathy and diastolic dysfunction.
- This established monkey model is valuable for understanding disease pathology.
- The model provides a foundation for exploring preventative and therapeutic strategies for diabetic cardiomyopathy.
