monitoring-of-systemic-and-hepatic-hemodynamic-parameters-in-mice

Monitoring of Systemic and Hepatic Hemodynamic Parameters in Mice

The use of mouse models in experimental research is of enormous importance for the study of hepatic physiology and pathophysiological disturbances. ...

visualization-vascular-parenchymal-regeneration-after-70-partial

Visualization of Vascular and Parenchymal Regeneration after 70% Partial Hepatectomy in Normal Mice

A modified silicone injection procedure was used for visualization of the hepatic vascular tree. This procedure consisted of in-vivo injection of the ...

Jena University Hospital

The First Affiliated Hospital of Wenzhou Medical University

Liver dysfunction is a serious complication in the early phase following major liver resection or liver transplantation and might be aggravated by the translocation of bacteria and lipopolysaccharide (LPS). As a preventive strategy, granulocyte colony-stimulating factor (G-CSF) is prophylactically applied in patients who are subjected to major surgery. However, we previously demonstrated that G-CSF can induce LPS sensitization. In this study, we aimed to evaluate the effects of G-CSF pretreatment on hepatic microcirculatory disturbances and postoperative liver dysfunction after 70 % partial hepatectomy (PH) in rats. PH alone was well tolerated by all animals (100 % survival rate, slight liver damage and inflammation). LPS application after 70 % PH caused moderate inflammation, microcirculatory disturbances and hepatic damage and led to a 24-h survival rate of 30 % after the operations. In the G-CSF-LPS-PH group, all of the rats died within 4 h with severe inflammatory responses and liver damage (i.e., pronounced erythrocyte congestion and neutrophil infiltration). Portal hypertension and microcirculatory disorders (i.e., inhomogeneous perfusion, sinusoidal dilatation and reductions on functional capillary density) were more pronounced in the G-CSF-LPS-PH group. In conclusion, increased circulating LPS levels were associated with an imbalanced inflammatory response and microcirculatory dysfunction that preceded liver damage and subsequent dysfunction following surgery. G-CSF-pretreatment aggravated microcirculatory disturbances and liver damage, which might have been related to G-CSF-induced LPS sensitization.

G-CSF pretreatment aggravates LPS-associated microcirculatory dysfunction and acute liver injury after partial hepatectomy in rats.

Ischemia is the first mechanism that provokes the loss of follicles in ovarian grafts over the long term. In whole ovarian transplantation, it remains unknown, however, how changes in follicular development are influenced by short-term ischemia. Fresh whole ovarian orthotopic auto-transplantation was performed in rabbits with 45 min ischemia, and the impact of ischemia on follicular survival and development status was evaluated at different time-points (1 day, 3 days, 1 week, 2 weeks and 1 month). Assessment of follicular quantity and morphology was carried out via histologic analysis. Follicle proliferating status was evidenced by immunostaining with proliferating cell nuclear antigen (PCNA), and the Hedgehog signaling pathway (Patched and Gli); was verified via TUNEL assay. Quantitative PCR was carried out to quantify the mRNA of target genes including PCNA, Patched, Gli, Caspase 3, Bax, and Bcl-2. Compared with its contralateral fresh controls, the morphology, proliferation and apoptosis of the follicles in the grafts showed no significant differences and most primordial follicles were quiescent. However, morphology and proliferation status were significantly decreased 1 week after grafting, in comparison with the longitudinal grafting time. Patched and Gli in the Hedgehog signaling pathway were activated in only the follicles of the grafts. Short-term ischemia slightly impacts follicular survival and development status in whole ovarian grafting. Receiving intervention in the first week post-transplantation might be helpful.

Developmental Status: Impact of Short-Term Ischemia on Follicular Survival of Whole Ovarian Transplantation in a Rabbit Model.

The intra-hepatic vascular anatomy in rodents, its variations and corresponding supplying and draining territories in respect to the lobar structure of the liver have not been described. We performed a detailed anatomical imaging study in rats and mice to allow for further refinement of experimental surgical approaches.

Intrahepatic Vascular Anatomy in Rats and Mice--Variations and Surgical Implications.

We adapted the anatomically oriented parenchyma-preserving resection technique for associating liver partition with portal vein ligation (PVL) for staged hepatectomy (ALPPS) in rats and examined the role of revascularization in intrahepatic size regulation.

Establishment of a rat model: Associating liver partition with portal vein ligation for staged hepatectomy.

Organ engineering is a new innovative strategy to cope with two problems: the need for physiological models for pharmacological research and donor organs for transplantation. A functional scaffold is generated from explanted organs by removing all cells (decellularization) by perfusing the organ with ionic or nonionic detergents via the vascular system. Subsequently the acellular scaffold is reseeded with organ-specific cells (repopulation) to generate a functional organ.

Bioengineered Livers: A New Tool for Drug Testing and a Promising Solution to Meet the Growing Demand for Donor Organs.

Liver regeneration consists of cellular proliferation leading to parenchymal and vascular growth. This study complements previous studies on cellular proliferation and weight recovery by (1) quantitatively describing parenchymal and vascular regeneration, and (2) determining their relationship. Both together are needed to (3) characterize the underlying growth pattern.

Chichi Xie

Department of General,
Visceral and Vascular Surgery,
Department of General, Visceral and Vascular Surgery

Jena University Hospital

Monitoring of Systemic and Hepatic Hemodynamic Parameters in Mice

Visualization of Vascular and Parenchymal Regeneration after 70% Partial Hepatectomy in Normal Mice

Chichi Xie

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Department of General,Visceral and Vascular Surgery,Department of General, Visceral and Vascular Surgery

Jena University Hospital

Monitoring of Systemic and Hepatic Hemodynamic Parameters in Mice

Visualization of Vascular and Parenchymal Regeneration after 70% Partial Hepatectomy in Normal Mice

Department of General,
Visceral and Vascular Surgery,
Department of General, Visceral and Vascular Surgery