Effect of Cryoprotectants on Long-Term Storage of Oral Mucosal Epithelial Cells: Implications for Stem Cell Preservation and Proliferation Status.

In this study, we tested a method for long-term storage of oral mucosal epithelial cells (OMECs) so that the cells could be expanded in vitro after cryopreservation and used for the treatment of bilateral limbal stem cell deficiency. The ability of suspended primary OMECs to proliferate in vitro after cryopreservation was compared to that of OMEC cultures that had undergone the same process. Both were preserved in standard complex medium (COM) with or without cryoprotective agents (CPAs) (gly-cerol at 5 % or 10 % or dimethyl sulphoxide at 10 %).

Optimizing Corneal Transplant Safety: The Impact of Mandatory Prion Protein Testing on Iatrogenic Creutzfeldt-Jakob Disease Prevention in the Czech Republic.

Purpose: The purpose of this study was to assess the effectiveness of legally mandated testing for pathogenic prion proteins in corneal tissue donors in the Czech Republic, considering its impact on safety, financial, and temporal costs.

Methods: Between January 2007 and December 2023, standardized brain regions were collected from all corneal tissue donors in the Czech Republic. Tissue samples were tested for the presence of pathogenic prion proteins by the Czech Reference Laboratory for Human Prion Diseases.

The new future perspective in corneal tissue utilisation - methods of preparation and preservation.

Purpose: The goal of our study is to find an optimal approach to the preparation and preservation of corneal stromal tissue. We want to compare different methods of corneal stromal tissue creation and storage to optimize the efficacy of this process under the conditions of an eye bank. After we find the most suitable method to create a safe high quality product, we want to prove the possibility of using a single donor cornea for more than one patient.

Merkel Cell Carcinoma of the Eyelids (Clinical-Histological Study).

Aim: To get acquainted with the issues of Merkel cell carcinoma (MCC) when the eyelid is affected and with its surgical solution.

Materials: MCC of the right upper eyelid was at the Department of Ophthalmology in the Faculty Hospital Královské Vinohrady in Prague (Czech Republic, EU) in 1998 woman 78 year. Another cases of the MCC on the left upper eyelid were observed in two women aged 48 and 67 years and they were pick up in a retrospective study covered 1033 operated tumors eyelids years 2007 - 2015.

Experimental elimination of various intestinal segments by means of devascularization (devitalization).

Segments of the small and large intestine, of varying lengths (10-180 cm), were devascularized by simultaneously ligating the mesenteric arteries and veins. When the circulation had been cut off, the ends of the devascularized segment were both ligated, continuity of intestinal passage was renewed by forming an anastomosis and the isolated segment was left in situ, together with its contents. Contrary to accepted views, no changes leading to death (necrosis and peritonitis) occurred, but the devascularized tissue was progressively destroyed and reconstructed until, after four weeks, all that was left was a minute fibrous residue.

[Small and large intestine devascularization (devitalization) and potentials in the therapeutic use of this operative method].

The experimental findings with devitalization of various intestinal segments by means of devascularization showed that the isolated segments left in peritoneal cavity (together with their contents) were gradually destroyed and changed into a slight fibrous residue. The retaining of the up to 180 cm long segment did not endanger the life of experimental animals. This experience was used in the surgical treatment of inoperable tumours in left half of large intestine and in rectosigmoideum.