Alginate encapsulation induce colony formation with umbilical cord-derived mesenchymal stem cells

Aim: The umbilical cord (UC) is a rich source of mesenchymal stem cell (MSC) isolation. Since the MSCs isolated from here have high self-renewal capacity and differentiation potential, production through biofabrication is essential for clinical treatments. For the cells to be stored for a long time and presented ready for use, encapsulation is required. In this study, UC-MSC cells were encapsulated with alginate using three different methods: alginate drop, alginate coating, and alginate sphere. Methods: The cell viability, live/dead cell ratio, and colony formation capacities of the encapsulated cells were examined for 14 days. Results: In the study, it was found that the most effective method was the alginate sphere form and that the structure of the cells should be preserved by injecting them into biomaterials in encapsulation. Colony formation potential was found to be high in biomaterials with alginate spheres. Conclusion: As a result, the preservation of UC-MSC cells with alginate sphere encapsulation via biofabrication and their clinical use availability may be beneficial for treating of many diseases

Biochemical relationship between leiomyosarcoma and peroxiredoxin-6 expression level: Clinical implications

552-527Uterine leiomyosarcomas are tumors with a heterogeneous genetic profiles that respond very poorly to cytotoxic chemotherapy with aggressive progression. We aimed to show the status of peroxiredoxin 6 as a biomarker in leiomyosarcoma progression.Study included 12 patients diagnosed with "leiomyosarcoma" and 13 patients diagnosed with "myoma" (as control) after histopathological examinations of clinical samples. Peroxiredoxin-6 gene expression and protein levels were evaluated on the tumor preparations (blocks) utilizing ELISA and PCR methods.Peroxiredoxin-6 protein was mainly localized in the cytoplasm of leiomyosarcoma cells, and the expression of peroxiredoxin-6 was significantly increased in cancerous tissues compared to normal myoma tissues (3.33±1.7 vs. 2.03±1.07fold change; P= 0.031). Peroxiredoxin-6 tissue protein levels were also significantly higher in leiomyosarcoma cases (100.54±66.86 vs. 183.72±64.54 pg/μg protein; P= 0.005). Our findings demonstrate that peroxiredoxin-6 plays a vital role in the emergence and development of leiomyosarcoma and that peroxiredoxin-6 level assessments can be used as a biomarker in guiding better prognosis andtreatment plans while managing leiomyosarcoma

On-Chip Organoid Formation to Study CXCR4/CXCL-12 Chemokine Microenvironment Responses for Renal Cancer Drug Testing

Organoid models have gained importance in recent years in determining the toxic effects of drugs in cancer studies. Organoid designs with the same standardized size and cellular structures are desired for drug tests. The field of microfluidics offers numerous advantages to enable well-controlled and contamination-free biomedical research. In this study, simple and low-cost microfluidic devices were designed and fabricated to develop an organoid model for drug testing for renal cancers. Caki human renal cancer cells and mesenchymal stem cells isolated from human umbilical cord were placed into alginate hydrogels. The microfluidic system was implemented to form size-controllable organoids within alginate hydrogels. Alginate capsules of uniform sizes formed in the microfluidic system were kept in cell culture for 21 days, and their organoid development was studied with calcein staining. Cisplatin was used as a standard chemotherapeutic, and organoid sphere structures were examined as a function of time with an MTT assay. HIF-1α, CXCR4 and CXCL-12 chemokine protein, and CXCR4 and CXCL-12 gene levels were tested in organoids and cisplatin responses. In conclusion, it was found that the standard renal cancer organoids made on a lab-on-a-chip system can be used to measure drug effects and tumor microenvironment responses

Platelets Proteomic Profiles of Acute Ischemic Stroke Patients.

Platelets play a crucial role in the pathogenesis of stroke and antiplatelet agents exist for its treatment and prevention. Through the use of LC-MS based protein expression profiling, platelets from stroke patients were analyzed and then correlated with the proteomic analyses results in the context of this disease. This study was based on patients who post ischemic stroke were admitted to hospital and had venous blood drawn within 24 hrs of the incidence. Label-free protein expression analyses of the platelets' tryptic digest was performed in triplicate on a UPLC-ESI-qTOF-MS/MS system and ProteinLynx Global Server (v2.5, Waters) was used for tandem mass data extraction. The peptide sequences were searched against the reviewed homo sapiens database (www.uniprot.org) and the quantitation of protein variation was achieved through Progenesis LC-MS software (V4.0, Nonlinear Dynamics). These Label-free differential proteomics analysis of platelets ensured that 500 proteins were identified and 83 of these proteins were found to be statistically significant. The differentially expressed proteins are involved in various processes such as inflammatory response, cellular movement, immune cell trafficking, cell-to-cell signaling and interaction, hematological system development and function and nucleic acid metabolism. The expressions of myeloperoxidase, arachidonate 12-Lipoxygenase and histidine-rich glycoprotein are involved in cellular metabolic processes, crk-like protein and ras homolog gene family member A involved in cell signaling with vitronectin, thrombospondin 1, Integrin alpha 2b, and integrin beta 3 involved in cell adhesion. Apolipoprotein H, immunoglobulin heavy constant gamma 1 and immunoglobulin heavy constant gamma 3 are involved in structural, apolipoprotein A-I, and alpha-1-microglobulin/bikunin precursor is involved in transport, complement component 3 and clusterin is involved in immunity proteins as has been discussed. Our data provides an insight into the proteins that are involved in the platelets' activation response during ischemic stroke. It could be argued that this study lays the foundation for future mechanistic studies