Rosuvastatin administered intraperitoneally reduces the formation of postoperative adhesions in rats.

OBJECTIVES: The purpose of the present experimental research was to assess the efficacy of intraperitoneal administration of rosuvastatin in preventing the formation of postoperative peritoneal adhesions. MATERIAL AND METHOD: Peritoneal adhesions were induced in 120 male rats of the Wistar-Bratislava breed, divided into 4 groups (n=30), using a parietal and visceral abrasion model. Group I was designated as the control group; in the case of group II, a saline solution was administered intraperitoneally, while in the case of groups III and IV, rosuvastatin solution with a concentration of 10 mg/kg and 5 mg/kg, respectively, was administered in a single dose, during laparotomy. All rats were sacrificed on the 14th postoperative day and the peritoneal adhesions were assessed macroscopically and microscopically. RESULTS: The formation of peritoneal adhesions (assessed macroscopically by appreciating their number, the area covered, and the degree of severity) was statistically significantly more reduced in the subjects that received rosuvastatin (groups III and IV) as compared to the control group (p<0.05). The degree of fibrosis assessed microscopically was also statistically significantly reduced in groups III and IV as compared to the control group (p<0.05). CONCLUSIONS: Rosuvastatin administered intraperitoneally correlates with a reduction of peritoneal adhesions in rats. KEY WORDS: Rosuvastatin, Peritoneal adhesions, Prevention.

Intraperitoneal administration of rosuvastatin prevents postoperative peritoneal adhesions by decreasing the release of tumor necrosis factor.

OBJECTIVES: The purpose of this experimental study was to demonstrate the reduction of peritoneal adhesions formation in rats after intraperitoneal administration of rosuvastatin, due to its anti-inflammatory effect. METHOD: Peritoneal adhesions were induced in 120 Wistar-Bratislava rats divided into 4 groups (n=30), using a parietal and visceral (cecal) abrasion model. Group I was designated as control group; in group II, a saline solution was administered intraperitoneally; in groups III and IV, a single dose of rosuvastatin solution, 10 mg/kg and 5 mg/kg respectively, was injected intraperitoneally. The serum values of tumor necrosis factor (TNF-α) and interleukin-1 (IL-1α) were determined on day 1 and day 7 postoperatively (ELISA). Macroscopic assessment of the peritoneal adhesions was conducted on day 14. RESULTS: Rosuvastatin therapy induced a significant decrease of tumor necrosis factor serum levels in groups III and IV, on day 1 and day 7 (p<0.01). Intraperitoneal administration of rosuvastatin correlated with a decrease of mean interleukin-1α levels on postoperative day 1 in groups III (p=0.0013) and IV (p=0.00011), but not on day 7, where the differences were no longer statistically significant (p=0.8) The reduction of postoperative peritoneal adhesions in the experimental rat model is supported by the anti-inflammatory effect of rosuvastatin, mediated mainly by the tumor necrosis factor. CONCLUSIONS: Rosuvastatin prevents the formation of postoperative peritoneal adhesions in rats. This effect may be linked to the inhibition of proinflammatory cytokines release in the early stages of adhesions formation. The present study suggests that rosuvastatin may be an efficient pharmacological agent in the prevention of postoperative peritoneal adhesions development, and requires further studies as it has a promising application value.

Surgical technique of concomitant laparoscopically assisted vaginal hysterectomy and laparoscopic cholecystectomy.

BACKGROUND: Laparoscopically assisted vaginal hysterectomy is one of the most frequently performed gynecologic operations, and numerous authors have demonstrated its safety and feasibility. CASE PRESENTATION: We practiced in some selected cases simultaneous laparoscopically assisted vaginal total hysterectomy with bilateral adnexectomy and laparoscopic cholecystectomy using 5 trocars without uterine manipulator. Previous examinations included abdominal ultrasound, cervix biopsy and CT of abdomen and pelvis. Our aim was to evaluate the surgical technique of our initial experiences for combined laparoscopically assisted vaginal hysterectomy and laparoscopic colecystectomy. CONCLUSIONS: Laparoscopic hysterectomy had a number of advantages over the conventional technique given the underlying associated diseases, postoperative pain, rapid recovery and aesthetic benefits.

Isolation, culture and detection of mesenchymal stem cells in tissues from critical limb ischemia model in rat.

INTRODUCTION: Rat mesenchymal stem cells (MSCs) represent a small portion of the cells in the stromal compartment of bone marrow and have the potential to differentiate into new blood vessel and other tissues. MSCs transplantation in tissues from critical limb ischemia model in rat may represent a therapeutic applications of vascular regeneration. AIM: The aim of this study was to isolate with a simple method the rat bone marrow stromal cells. Then the adherent cells were labeled with 5-bromo-2-deoxyuridine (BrdU, Sigma) and injected in the gastrocnemius and adductor muscle of ischemic hind limbs in order to demonstrate their presence in the critical limb ischemia model in rat. MATERIAL AND METHODS: MSCs were isolated from Wistar rats, 8 weeks of age. The MSCs were labeled in vitro for later identification by adding 10 µg/mL 5-bromo-2 -deoxyuridine (BrdU, Sigma). RESULTS: Small colonies of fibroblast-like cells were seen after several days of primary culture. These colonies increased in size and were subcultured after 15-18 days. CONCLUSION: The MSCs obtained in this study presented a stable undifferentiated phenotype under normal culture conditions. MSCs are easy to isolate, culture, and detect in in vivo culture. These cells are characterized by high plasticity and could have an important role in angiogenesis.

Induction of a chronic myocardial infarction in the laboratory animal - experimental model.

INTRODUCTION: Ischemic heart disease is a major public health problem in western countries. Appropriate animal experimental models of chronic myocardial infarction is an essential first step in order to investigate and develop new therapeutic interventions. AIM: The aim of this study was to find an optimal place for a coronary artery ligation to induce an optimal chronic myocardial infarction and also a new heart approach that will not require oro-tracheal intubation. MATERIAL AND METHODS: To achieve these goals we used a group of rabbits and after induction of anesthesia and cardiac exposure by rib osteotomy (rib III, IV and V) at the costo-sternal junction level on the right side we performed three different left anterior descending artery (LAD) ligation at different distances (5, 10 and 15 mm) in relation to the apex. Thirty days after the acute myocardial infarction, we correlated laboratory investigations (serology, ECG, cardiac ultrasound) with histopathological findings. RESULTS: Heart approach achieved by rib osteotomy (rib III, IV and V) at the costo-sternal junction level on the right side, maintains the integrity of the ribcage, allowing it to take part in respiratory movements and the animal model does not need oro-tracheal intubation. Ligation of LAD at 15 mm from the apex was incompatible with life; ligation of LAD at 5 mm from the apex does not achieved transmural myocardial infarction and ligation of LAD at 10 mm from the apex achieved a transmural myocardial infarction of the left ventricle which also involved the distal part of the interventricular septum. CONCLUSION: Ligation of LAD at 10 mm from the apex achieved a transmural myocardial infarction of the left ventricle, is in an easily accessible area from technical point of view, it is sufficiently expanded to induce hemodynamic effects that can be quantified with paraclinical examination and also it is compatible with the experimental animal life. If the heart is approached by rib III, IV and V osteotomy at the costo-sternal junction level on the right side combined with neuroleptic anaesthesia, the animal does not need assisted ventilation.