{"title":"Effect of Liposome Charge and Composition on the Delivery of Trehalose into Red Blood Cells","authors":"J. Holovati, M. Gyongyossy-Issa, J. Acker","doi":"10.1089/CPT.2008.0008","DOIUrl":"https://doi.org/10.1089/CPT.2008.0008","url":null,"abstract":"Although the disaccharide trehalose has been shown to protect cells during freezing and desiccation when present intracellularly, a major obstacle to using intracellular sugars for biopreservation applications is the impermeability of plasma membranes. We are investigating the use of liposomes, which are synthetic, microscopic vesicles, for the intracellular delivery of stabilizing sugars into mammalian cells. Previous work has shown that the mechanism of red blood cell (RBC)–liposome interaction includes both liposome fusion with the RBC membranes, as well as tight adsorption of the vesicles onto the RBC surface. However, the fusion efficiency of liposomes was low, with only micromolar concentrations of trehalose delivered to the RBC cytosol. The purpose of this study is to enhance the efficacy of liposomes’ delivery of trehalose into RBCs with minimal detrimental effects on RBC membrane quality, by manipulating liposome physical properties and liposome–RBC incubation conditions. Charged and uncharged un...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"207-218"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60915949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Desai, J. Szeptycki, M. Scott, F. Abdelhafez, J. Goldfarb
{"title":"Artificial Collapse of Blastocysts Before Vitrification: Mechanical vs. Laser Technique and Effect on Survival, Cell Number, and Cell Death in Early and Expanded Blastocysts","authors":"N. Desai, J. Szeptycki, M. Scott, F. Abdelhafez, J. Goldfarb","doi":"10.1089/CPT.2008.0007","DOIUrl":"https://doi.org/10.1089/CPT.2008.0007","url":null,"abstract":"The purpose of this study was to systematically examine blastocoelic fluid reduction prior to vitrification and its potential benefits. In addition, we compared artificial collapse (AC) by laser pulse to a mechanical method. Mouse and dicarded human blastocysts were used in this study. Blastocysts were collapsed using either a 10 ms pulse with a laser (LAC) or else mechanical puncture with a microneedle (MAC). Blastocysts were vitrified on cryoloops using a two-step ethylene glycol/dimethyl sulfoxide protocol. We examined the effects of AC on specific outcome parameters such as overall survival, reexpansion, cell proliferation, and DNA damage. Unlike others, we report overall high survival rates with expanded blastocysts even without fluid reduction. We did detect a significant increase in blastomeres showing signs of DNA damage in the control group (13%) in comparison to blastocysts AC prior to vitrification (LAC 3%, MAC 5%; p < 0.001). Control blastocysts exhibited a lower rate of reexpansion. Within 3 ...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"181-190"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60915932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tumor Grade Predicts Tumor Proportion in Fresh Frozen Tissue Samples for Breast Cancer Research","authors":"R. Gandour-Edwards, Sandra L. Taylor, L. Beckett","doi":"10.1089/CPT.2008.0010","DOIUrl":"https://doi.org/10.1089/CPT.2008.0010","url":null,"abstract":"Breast cancer research frequently requires frozen cancer tissue samples for potential biomarker detection. Ninety-one breast cancer frozen tumor tissue samples were examined for factors contributing to the proportion of the tumor cells per sample. The strongest predictor of high proportion tumor cells was tumor grade as determined by the Scarff–Bloom–Richardson scoring system, followed by tumor size. Because the low-grade tumors had fewer tumor cells per specimen, the type of surgery and experience level of the sample collector was not significant. This variable should be considered by investigators when evaluating potential biomarkers.","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"24 1","pages":"219-222"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60916125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Hafez, H. Sheth, G. Glantzounis, H. Parkes, A. Seifalian, B. Fuller, B. Davidson
{"title":"Glycine Protects Bile Physiology and Biliary-Specific Liver Cell Metabolism from Ischemia-Reperfusion Injury: A 1H NMR Study","authors":"T. Hafez, H. Sheth, G. Glantzounis, H. Parkes, A. Seifalian, B. Fuller, B. Davidson","doi":"10.1089/CPT.2008.0006","DOIUrl":"https://doi.org/10.1089/CPT.2008.0006","url":null,"abstract":"Liver ischemia-reperfusion (I/R) injury is a major complication of liver resection and transplantation. Cytokine release by activated Kupffer cells (KCs) play a central role in the inflammatory cascade of I/R injury. There is evidence that glycine may protect against liver I/R injury by inhibition of KC activity. However, its effect on bile flow, an established marker of hepatic function, and bile composition is not known. A rabbit model of hepatic lobar warm I/R was used. Under general anesthesia, the sham group (n = 6) underwent laparotomy alone for 7 h. The I/R group (n = 6) underwent 60 min of left and median lobe inflow occlusion and 6 h of reperfusion. The glycine + I/R group (n = 6) underwent a same procedure to controls after receiving glycine 5 mg/kg intravenous infusion for over 15 min. Bile flow was collected, measured, and analyzed by proton magnetic resonance spectroscopy. Glycine prevented the significant reduction in bile flow seen in I/R at 6 h reperfusion (145.0 ± 11.4 vs. 108.3 ± 28.2 μL...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"173-180"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60915871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. García, Eva García-Pérez, E. Belyakova, S. Llames, M. Pevida, F. Tévar, J. Otero, Á. Meana
{"title":"Room Temperature Storage of Cultured Human Articular Chondrocytes","authors":"V. García, Eva García-Pérez, E. Belyakova, S. Llames, M. Pevida, F. Tévar, J. Otero, Á. Meana","doi":"10.1089/CPT.2008.0009","DOIUrl":"https://doi.org/10.1089/CPT.2008.0009","url":null,"abstract":"Cell therapy requires proper techniques to store cells in good viability conditions. Liquid nitrogen containers may store cells indefinitely, but samples may suffer cross-contamination or bacterial contamination when they are manipulated. Cultured human chondrocytes are commonly employed in cell therapy. In this study, we show a simple system to store them at room temperature. We investigated 12 strains of cultured chondrocytes. First, we studied four strains, which were stored in different conditions. Later, we studied the other eight strains, which were maintained in the optimal viability condition obtained from the first experiment (room temperature with DMEM and HAM-F12 as maintenance medium). Using HAM-F12 as the maintenance medium, the viability after 15 days was similar to that of the control cells. After 30 days, the average viability was 87%. In both cases, cells were able to reach exponential growth when restored to 37oC. They could also synthesize specific cartilage extracellular matrices after...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"199-206"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60916005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Leboeuf, P. Ratajczak, Weili Zhao, L. Plassa, Magali Court, H. Pisonero, H. Murata, J. Cayuela, J. Ameisen, J. Garin, A. Janin
{"title":"Long-Term Preservation at Room Temperature of Freeze-Dried Human Tumor Samples Dedicated to Nucleic Acids Analyses","authors":"C. Leboeuf, P. Ratajczak, Weili Zhao, L. Plassa, Magali Court, H. Pisonero, H. Murata, J. Cayuela, J. Ameisen, J. Garin, A. Janin","doi":"10.1089/CPT.2008.0003","DOIUrl":"https://doi.org/10.1089/CPT.2008.0003","url":null,"abstract":"Tumor banks are the only means for researchers to study in situ human lesions in a reproducible manner. Large amounts of money are spent at national and international levels for proper collection, in respect of both quality control and ethics, most importantly for shared use of the human samples. Preservation as whole tissue, and not simply as extracted DNA or RNA, allows additional scientific use of the samples. However, economic issues influence long-term development of biobanks since low-temperature cryopreservation with long-term storage of numerous samples and transfers avoiding RNA degradation are particularly costly. We optimized freeze-drying protocols for tumor samples dedicated to molecular analyses in our biobank using directly snap-frozen samples as references. We then compared different long-term storage conditions for preservation of nucleic acids in tumor samples to corresponding normal tissues and human cell lines. When stored for 1 year at room temperature with dessicant and no light, cel...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"191-198"},"PeriodicalIF":0.0,"publicationDate":"2008-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60915715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liv Paltiel, Kjersti S Rønningen, Helle M Meltzer, Susan V Baker, Jane A Hoppin
{"title":"Evaluation of Freeze Thaw Cycles on stored plasma in the Biobank of the Norwegian Mother and Child Cohort Study.","authors":"Liv Paltiel, Kjersti S Rønningen, Helle M Meltzer, Susan V Baker, Jane A Hoppin","doi":"10.1089/cpt.2008.0012","DOIUrl":"https://doi.org/10.1089/cpt.2008.0012","url":null,"abstract":"<p><p>BACKGROUND: In many cohort studies, biological specimens are being stored without specific plans for analyses. In the Norwegian Mother and Child Cohort Study biological specimens (DNA, plasma, and whole blood) are stored on 96-well plates and as a result may undergo multiple freeze-thaw cycles. METHODS: To explore the impact of multiple freeze-thaw cycles on chemical constituents, we conducted a quality control study using pooled EDTA-plasma. Over a two-year period, samples stored at -80 degrees C were subjected up to 100 freeze-thaw cycles. Specimens were analyzed in triplicate for sodium, cholesterol, triglycerides, vitamin E, aspartate aminotransferase (AST), and free fatty acids. We assessed the percent change of analyte concentration from the values for the first freeze-thaw cycle, because this is the baseline for all stored specimens. RESULTS: With the exception of free fatty acids, there was little change over the first 10 freeze-thaw cycles. A majority of analytes showed no significant changes until 30 freeze-thaw cycles. After 30 freeze-thaw cycles, the largest percent change was observed for free fatty acids (+32%), AST (+21%), and triglycerides (-19%). CONCLUSIONS: Human plasma can go through several freeze-thaw cycles before analysis without influencing sample integrity for the selected analytes.</p>","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 3","pages":"223-230"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/cpt.2008.0012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28951614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
William E Grizzle, Katherine C Sexton, Walter C Bell
{"title":"Quality Assurance in Tissue Resources Supporting Biomedical Research.","authors":"William E Grizzle, Katherine C Sexton, Walter C Bell","doi":"10.1089/cpt.2008.9993.","DOIUrl":"https://doi.org/10.1089/cpt.2008.9993.","url":null,"abstract":"<p><p>Modern biomedical research requires access to high quality specimens of human tissue with or without extensive clinical annotation. Multiple types of organizations have developed to supply human tissues to support biomedical research. These organizations follow different models including the specific models of 1) prospective collection, 2) tissue banking, and 3) tissue collection associated with clinical trials as well as the model of 4) a tissue resource that incorporates features of the other models. These types of organizations devoted to supplying tissues for research have chosen different goals to meet the different tissue and informational needs of the investigators to whom they supply tissue. In order to provide high quality tissues to support research, all models should rely on a strong quality assurance program with extensive quality control of the tissues being provided to support research. In addition to facilities which collect, process, store and provide tissues, the need for a rigorous QA program applies to all resources and infrastructures used to support biomedical research. The UAB Tissue Collection and Banking Facility which provides human tissue to support biomedical research has been functioning and developing since 1979. To our knowledge, similar programs in providing tissues from animals are less developed, but could easily follow the models which UAB and other institutions providing human tissues have established, including the approaches of UAB and others to QA and QC. This manuscript reviews the current concepts of QA and QC in use in organizations supplying tissue to support biomedical research as well as new approaches in QA and QC that have been proposed.</p>","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 2","pages":"113-118"},"PeriodicalIF":0.0,"publicationDate":"2008-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3094015/pdf/nihms-116023.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29883228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigating Interactions of Trehalose-Containing Liposomes with Human Red Blood Cells","authors":"J. Holovati, M. Gyongyossy-Issa, J. Acker","doi":"10.1089/CPT.2008.0004","DOIUrl":"https://doi.org/10.1089/CPT.2008.0004","url":null,"abstract":"A major obstacle in using intracellular sugars for the cryopreservation of mammalian cells is the inability of cells to synthesize or actively accumulate these sugars. We are investigating the use of liposomes, which are synthetic, microscopic vesicles, for the intracellular delivery of stabilizing sugars into mammalian cells. This study examines the interactions of trehalose-containing liposomes with human red blood cells (RBCs). Unilamellar liposomes were synthesized using an extrusion method to contain trehalose in the aqueous core. Liposomal preparations were labeled with a lipophilic fluorophore rhodamine B chloride (R18) at quenching concentrations (4 mol%), or the 5(6)-carboxyfluorescein [5(6)-CF] marker to label the intraliposomal aqueous phase. Flow cytometry and fluorescent microscopy were used to assess the interactions between fluorescently labeled liposomes and RBCs. The delivery of liposomal contents into RBCs was assessed by spectrophotometric measurement of intracellular trehalose. The res...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"133-146"},"PeriodicalIF":0.0,"publicationDate":"2008-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60916179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Loading Trehalose into Red Blood Cells by Improved Hypotonic Method","authors":"Xinli Zhou, Hui He, Baolin Liu, T. Hua","doi":"10.1089/CPT.2008.0001","DOIUrl":"https://doi.org/10.1089/CPT.2008.0001","url":null,"abstract":"As a first step toward long-term preservation of red blood cells (RBCs) by using freeze-drying, we present an improved hypotonic method for loading RBCs with trehalose. The method is based on the o...","PeriodicalId":51233,"journal":{"name":"Cell Preservation Technology","volume":"6 1","pages":"119-124"},"PeriodicalIF":0.0,"publicationDate":"2008-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1089/CPT.2008.0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60915646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}