repeated-blood-collection-from-tail-vein-non-anesthetized-rats-with

Repeated Blood Collection from Tail Vein of Non-Anesthetized Rats with a Vacuum Blood Collection System

Blood can be collected from rats in a number of sampling locations. For instance, the tail vein is a superior location for blood sampling. However, the ...

modified-blood-collection-from-tail-veins-non-anesthetized-mice-with

Modified Blood Collection from Tail Veins of Non-anesthetized Mice with a Vacuum Blood Collection System and Eyeglass Magnifier

Blood sample collection is the basis of experimental animal research. It is of importance to obtain adequate blood samples for various research purposes. ...

Jianghan University

Huazhong University of Science and Technology

We previously reported significantly enhanced cardiac remodeling post aortocaval fistula (AV) in unilateral nephrectomized (UNX) rats. However, the relationship between the size of the AV and the cardiorenal effects in UNX rats remains unknown. In the present study, AV was induced by 20, 18 and 16 gauge needles in UNX rats to see if larger shunt would definitely induce heavier cardiac and renal damage in UNX rats. Our results demonstrated that bigger shunt size is linked with proportional more significant cardiorenal remodeling and dysfunction in UNX rats. Expression of inflammatory biomarkers including CRP, TNF-α, IL-6, IL-1β, TGF-β and MCP-1 in left kidney and heart was significantly increased in all UNX + AV groups compared to Sham rats. Inflammation might thus participate in the worsening cardiorenal functions and remodeling processes in this model.

Impact of aortocaval shunt flow on cardiac and renal function in unilateral nephrectomized rats.

Objective Autonomic dysfunction is recognized in patients with coronary artery disease (CAD) and is related to worse cardiovascular outcome. This study aimed to evaluate cardiac autonomic nervous function by heart rate recovery (HRR) and heart rate variability (HRV), and demonstrate their relationship with the severity of coronary lesions in patients with stable CAD (SCAD). Methods Consecutive patients without CAD (controls, n = 65) and those with SCAD (n = 63) were included in this study. Patients with SCAD were further divided into single- or two-/three-vessel disease, as well as <70% or ≥70% stenosis subgroups. The association between HRR/HRV and coronary lesions was analysed. Results HRR and HRV values were significantly lower in the SCAD group compared with the control group. Multivariate logistic regression analysis showed that abnormal HRR and HRV were risk factors of SCAD. Moreover, delayed HRR was a risk factor of the severity of coronary lesions. Conclusions Our results show that autonomic function is impaired in patients with SCAD and delayed HRR is closely related to the severity of coronary lesions.

Association between cardiac autonomic nervous dysfunction and the severity of coronary lesions in patients with stable coronary artery disease.

To explore the relationship between blood pressure control and autonomic nervous function assessing by heart rate variability (HRV) and heart rate turbulence (HRT) in hypertensive patients.

Value of Assessing Autonomic Nervous Function by Heart Rate Variability and Heart Rate Turbulence in Hypertensive Patients.

Reducing sympathetic neurohormone expression is a key therapeutic option in attenuating cardiac remodelling. Present study tested the feasibility of attenuating cardiac remodelling through reducing sympathetic neurohormone level by partial cardiac sympathetic denervation in a rat model of chronic volume overload. Male Sprague-Dawley rats were randomized into sham group (S, n = 7), aortocaval fistula group (AV, n = 7), and aortocaval fistula with bilateral sympathetic stellate ganglionectomy group (AD, n = 8). After 12 weeks, myocardial protein expression of sympathetic neurohormones, including tyrosine hydroxylase, neuropeptide Y, growth associated protein 43, and protein gene product 9.5, were significantly up-regulated in AV group compared to S group, and down-regulated in AD group. Cardiac remodelling was aggravated in AV group compared to S group and attenuated in AD group. The myocardial deposition of extracellular matrix, including collagen I and III, was enhanced in AV group, which was reduced in AD group. Myocardial angiotensin II and aldosterone expressions were significantly up-regulated in AV group and down-regulated in AD group. Our results show that bilateral sympathetic stellate ganglionectomy could attenuate cardiac remodelling and fibrosis by down-regulating sympathetic neurohormones expression in this rat model of chronic volume overload.

Mingjing Zhang

Heart Center at Puai Hospital,
Wuhan Puai Hospital,
Heart Center at Puai Hospital, Wuhan Puai Hospital

Jianghan University

Repeated Blood Collection from Tail Vein of Non-Anesthetized Rats with a Vacuum Blood Collection System

Modified Blood Collection from Tail Veins of Non-anesthetized Mice with a Vacuum Blood Collection System and Eyeglass Magnifier

Mingjing Zhang

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Heart Center at Puai Hospital,Wuhan Puai Hospital,Heart Center at Puai Hospital, Wuhan Puai Hospital

Jianghan University

Repeated Blood Collection from Tail Vein of Non-Anesthetized Rats with a Vacuum Blood Collection System

Modified Blood Collection from Tail Veins of Non-anesthetized Mice with a Vacuum Blood Collection System and Eyeglass Magnifier

Heart Center at Puai Hospital,
Wuhan Puai Hospital,
Heart Center at Puai Hospital, Wuhan Puai Hospital