Limbal niche cells can reduce the angiogenic potential of cultivated oral mucosal epithelial cells.

This study aims to employ a culture system using allogenic limbal niche cells (LNCs) instead of mouse-derived 3T3 cells as a feeder layer that could relieve postoperative neovascularization. Methods: Rat oral mucosal epithelial cells (OMECs) were co-cultured with rat LNCs or 3T3 cells. Cultivated oral mucosal epithelial cells (COMECs) of different culture systems were identified by hematoxylin and eosin staining and immunocytochemistry. The expression levels of the angiogenesis-related factors were analyzed by RT-qPCR and western blotting/ELISA. Angiogenic potential was reconfirmed by cell viability and tube formation assays with human umbilical vein endothelial cells (HUVECs). Results: COMECs were obtained from both culture systems successfully. Immunocytochemistry showed approximately equal percentages of positive staining cells for p63α (p = 0.9177), ABCG2 (p = 0.526), Ki67 (p = 0.0987), and CK3 (p = 0.4000) in COMECs of different groups. RT-qPCR and western blotting/ELISA showed that COMECs of the LNC group expressed a significantly lower amount of basic fibroblast growth factor (bFGF) (p = 0.0038 for RT-qPCR, p = 0.0026 for western blotting) but more pigment epithelium-derived factor (PEDF) (p = 0.0172 for RT-qPCR, p = 0.0253 for western blotting) and soluble fms-like tyrosine kinase-1 (sFlt-1) (p 
Source: Cellular and Molecular Biology Letters - Category: Biochemistry Authors: Tags: Cell Mol Biol Lett Source Type: research

Related Links:

Conclusions: This study showed no change in clinical signs in severe DED due to oGvHD, which was not unexpected due to the underlying pathomechanisms. However, the study showed improvement of symptoms in individual patients allowing application of perfluorohexyloctane as an additional symptomatic therapy in oGvHD.Ophthalmic Res
Source: Ophthalmic Research - Category: Opthalmology Source Type: research
CONCLUSIONS: Due to the potential severity of ocular GvHD with immobilisation of the patients and the imminent loss of sight, further improvements in eye care are required. For example, offers such as special consultations, with expertise located close to any transplantation unit are recommended. This requires in particular ophthalmologists to participate in the patient care to enhance quality of life after allo-SCT. In summary, we conclude that the present structures are not sufficient to treat all patients suffering from ocular GvHD in Germany, but the situation has evidently improved. PMID: 31075805 [PubMed - as supplied by publisher]
Source: Klinische Monatsblatter fur Augenheilkunde - Category: Opthalmology Tags: Klin Monbl Augenheilkd Source Type: research
Discussion In this section, we discuss the mechanisms responsible for lymphomagenesis in the various inborn errors of immunity and provide an overview of the treatment. Defects in Immune Responses That Predispose to Lymphomagenesis in PIDDs The complex immune mechanisms and their interplay that predisposes to neoplastic transformation of B or T cells and development of lymphomas in PIDD patients has not been fully elucidated. However, it is expected that the etiology in most cases is multifactorial and related to a dynamic regulation of immune response and environmental triggers (Figure 3). An underlying intrinsic susce...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Abstract Corneal Epithelial Stem Cells (CESCs) and their proliferative progeny, the Transit Amplifying Cells (TACs), are responsible for maintaining the integrity and transparency of the cornea. These stem cells (SCs) are widely used in corneal transplants and ocular surface reconstruction. Molecular markers are essential to identify, isolate and enrich for these cells, yet no definitive CESC marker has been established. An extensive literature survey shows variability in the expression of putative CESC markers among vertebrates; being attributed to species-specific variations, or other differences in developmenta...
Source: Experimental Eye Research - Category: Opthalmology Authors: Tags: Exp Eye Res Source Type: research
Ocular graft-versus-host disease (GVHD) is a common complication of allogeneic hematopoietic stem cell transplantation (HSCT), affecting 40-60% of patients within 3 years after transplant. While the most common clinical manifestation is dry eye disease (DED), ocular GVHD can result in epithelial changes in the cornea that contribute to ocular pain and vision loss.
Source: Biology of Blood and Marrow Transplantation - Category: Hematology Authors: Tags: 349 Source Type: research
CONCLUSIONS: The treatment with hMSCs by subconjunctival injection is effective in reducing corneal inflammation and squamous metaplasia in ocular GVHD (oGVHD). Local treatment with hMSCs is a promising strategy for oGVHD. PMID: 30630121 [PubMed - as supplied by publisher]
Source: The Ocular Surface - Category: Opthalmology Authors: Tags: Ocul Surf Source Type: research
Conclusions: Artificial reproduction of Descemet membrane with respect to topography and similar stiffness offers a potential innovative way to bioengineer a functional CEC monolayer from autologous stem cells.
Source: Cornea - Category: Opthalmology Tags: Basic Investigation Source Type: research
Conclusions: KID syndrome is a rare cause of LSCD. Although OSST can stabilize the surface, long-term treatment of KID syndrome can be challenging. An lr-CLAL may offer further benefit over a KLAL in these eyes because it is HLA- and ABO-matched tissue; it also helps to treat keratoconjunctivitis sicca, often a prominent feature of KID syndrome.
Source: Cornea - Category: Opthalmology Tags: Case Report Source Type: research
Introduction:Ocular graft-versus-host disease (GvHD) is a common complication of allogeneic hematopoietic stem cell transplantation (alloHSCT), typically affecting 40-60% of patients within 3 years after alloHSCT. The most common clinical manifestation is dry eye disease (DED), which may lead to secondary epithelial changes in the cornea such as filamentary keratitis, and contribute to ocular discomfort and further complications. Patients with DED typically require a complete ophthalmologic examination, including a slit lamp exam to look at punctate epithelial erosions (PEEs) and other ocular surface findings. Treatment fo...
Source: Blood - Category: Hematology Authors: Tags: 722. Clinical Allogeneic Transplantation: Acute and Chronic GVHD, Immune Reconstitution Source Type: research
ConclusionsWe have shown for the first time that TSP-1, PF4,and GAL-1 are associated with engraftment in patients with SCD who undergo haplo HSCT. The study warrants further validation in a larger sample size as well as in vitro and in vivo analyses to evaluate whether our candidate proteins are associated with tolerance induction.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - Category: Hematology Authors: Tags: 721. Clinical Allogeneic Transplantation: Conditioning Regimens, Engraftment, and Acute Transplant Toxicities: Comorbidity and Novel Strategies to Improve Graft Function Source Type: research
More News: Biochemistry | Biology | Corneal Transplant | Molecular Biology | Stem Cell Therapy | Stem Cells | Study | Transplants