Donor variability of ovine bone marrow derived mesenchymal stem cell - implications for cell therapy

It is assumed that all species, including sheep, demonstrate significant variation between individuals including the characteristics of their bone marrow-derived mesenchymal stem cells (BM-MSCs). These differences may account for limited success in pre-clinical animal studies and may also impact on treatment strategies that are used within regenerative medicine. This study investigates variations between ovine MSCs (oMSCs) isolated from 13 English Mule sheep donors by studying cell viability, expansion, the cells' trilineage differentiation potential and the expression of cell surface markers. In addition to the primary objective, this article also compares various differentiation media used for the trilineage differentiation of oMSCs. In this study, a clear individual variation between the sheep donors regarding oMSCs characterization, tri-lineage differentiation potential and marker expression was effectively demonstrated. The results set out to systematically explore the ovine mesenchymal stem cell population derived from multiple donors. With this information, it is possible to start addressing the issues of personalized approaches to regenerative therapies.

Role of Chitosan Application in Postoperative Abdominal Adhesions in Rabbits

     This study was performed to evaluate the reliability and efficacy of intra-peritoneal performances of chitosan powder in preventing abdominal adhesions following laparotomy. Twenty clinically healthy rabbits of both sexes, weighing 1.5-2 kg were allocated randomly into 2 equal groups; control group (G1) and treated group (G2). After surgical preparation the animals had undergone to laparotomy which was performed to create a sero-muscular incision of 4cm length in the stomach, in G1 the incision was closed by suturing stomach wound and abdominal wall, While (G2) animals were subjected to same operation but after stomach incision suturing, 1gr. of chitosan powder was sprinkled on stomach incision and peritoneal cavity prior to the lina alba and skin closures. 5 animals of each group were euthanized at two periods:   7th and 21st   day post operation, adhesions in abdominal cavity were examined macroscopically and microscopically. The results showed clearly no adhesions at the operation site (the stomach wound), also on all abdominal organs and peritoneum cavity in both examination periods in G2. In conclusion this study revealed that chitosan plays a vital role in restrictions of intra-abdominal adhesion even though the mechanism of action is still unknown.

The Effect of Banana Leaf as Poultice on Wound Healing In Rabbits

The objective of this study is to determine the effectiveness of banana leafs as a wound dressing in rabbits. Ten adults local breed male rabbits weighing between 1.5 – 2 kg were used. The animals were divided into two equal groups. Animals were anesthetized by xylazine 5 mg / kg BW mixed with ketamine 40 mg / kg BW intramuscularly. Under aseptic technique (4-6) avulsion wounds 1cm in diameter were made on the back region of each rabbit. Control group didn’t receive any treatment, while the treated group the wounds were covered by the banana leaf as poultice for 14 days. Histopathological and gross evaluation revealed that there are significant differences between the two groups, because banana leaf provides a clean, waxy non adherent, water proof, and cheap dress to prevent the wound from the contaminated external environment