Abstract The study evaluated the effect of different cryoprotectants on post-thaw survival and motility of Kolbroek sperm. Semen from Kolbroek boars was collected with the gloved hand technique. Ejaculates were diluted with Beltsville thawing solution (BTS) at a ratio of 1 : 1 prior to freezing. Semen was diluted with egg yolk tris; thereafter, one of the three cryoprotectants (14% glycerol, 14% DMSO or 7% glycerol + 7% DMSO) were added. Diluted samples were then loaded into 0.5 mL straws and cooled with a programmable freezer. Thereafter the semen straws were plunged directly into liquid nitrogen (-196 °C) and stored for 48 h. Frozen straws were thawed at 39 °C for a minute and evaluated for sperm motility and survival at 0, 30, 60 and 90 min post-thaw. The post-thaw sperm survival frozen using glycerol as a cryoprotectant was significantly higher immediately after thawing, compared to DMSO, however, similar to the combination of glycerol and DMSO. There was no significant difference on motility rate immediately (0 min) post-thaw between the three cryoprotectants. Sperm cryopreserved with glycerol exhibited a significantly higher percentage motility at 30, 60 and 90 min post-thaw than in the other cryoprotectants. Based on sperm motility, glycerol was a better cryoprotectant for cryopreservation of Kolbroek boar sperm.

Estudos sobre a biologia reprodutiva de primatas não humanos são importantes para o desenvolvimento de biotecnologias da reprodução, visando a conservação das espécies. O objetivo deste estudo foi avaliar métodos de criopreservação do sêmen de Callithrix jacchus e C. penicillata. O sêmen foi colhido pelo método da vibroestimulação peniana, de animais adultos mantidos em cativeiro. Imediatamente após a colheita, foram analisadas as variáveis volume, pH, concentração, motilidades total e progressiva, integridade de membrana plasmática, integridade de acrossomo, atividade citoquímica mitocondrial, fragmentação de DNA e morfologia espermática. As amostras foram então refrigeradas em diluidor TEST gema de ovo sem glicerol; após este período, foi adicionado o glicerol a 4 e 6% de concentração e novas análises foram realizadas. O sêmen foi congelado em vapor de nitrogênio e finalmente em imersão em nitrogênio. As amostras foram descongeladas após um período mínimo de um mês e meio, e novas análises realizadas aos 10, 40 e 80 minutos pós-descongelação. Foi observado que o sêmen fresco de C. jacchus e C.penicillata são semelhantes em muitos aspectos. O diluidor TEST gema de ovo com o glicerol tanto a 4 como a 6% de concentração não foi eficaz para a proteção dos espermatozoides das duas espécies durante a criopreservação. São necessários outros estudos para o desenvolvimento de um protocolo de criopreservação do sêmen das duas espécies. Contudo, este trabalho contém informações que podem nortear futuros estudos sobre a criopreservação do sêmen destas e de outras espécies de primatas neotropicais. / Studies on the reproductive biology of nonhuman primates are important for the development of reproductive biotechnologies, in order to species conservation. The aim of this study was to evaluate methods for sperm cryopreservation from Callithrix jacchus and C. penicillata. Semen was collected by penile vibrostimulation from adult animals kept in captivity. Immediately after collection, the variables analyzed were volume, pH, concentration, total and progressive motility, plasma membrane integrity, acrosome integrity, cytochemical mitochondrial activity, DNA fragmentation and morphology. The samples were then chilled in TEST egg yolk extender without glycerol; after this period, the glycerol was added at concentrations of 4 and 6% and further analyzes were performed. The semen was frozen in nitrogen vapour and finally immersion in nitrogen. After a minimum of one month and a half, the samples were thawed and further analysis performed at 10, 40 and 80 minutes after thawing. Fresh semen from C. jacchus and C. penicillata were found to be similar in many aspects. The extender TEST egg yolk with glycerol as much as 4 to 6% concentration was not effective for the protection of spermatozoa from both species during cryopreservation. Further studies are needed to develop a protocol for cryopreservation of semen from both species. However, this work contains information that can guide future studies on sperm cryopreservation of these and other Neotropical primates species.

Estudos sobre a biologia reprodutiva de primatas não humanos são importantes para o desenvolvimento de biotecnologias da reprodução, visando a conservação das espécies. O objetivo deste estudo foi avaliar métodos de criopreservação do sêmen de Callithrix jacchus e C. penicillata. O sêmen foi colhido pelo método da vibroestimulação peniana, de animais adultos mantidos em cativeiro. Imediatamente após a colheita, foram analisadas as variáveis volume, pH, concentração, motilidades total e progressiva, integridade de membrana plasmática, integridade de acrossomo, atividade citoquímica mitocondrial, fragmentação de DNA e morfologia espermática. As amostras foram então refrigeradas em diluidor TEST gema de ovo sem glicerol; após este período, foi adicionado o glicerol a 4 e 6% de concentração e novas análises foram realizadas. O sêmen foi congelado em vapor de nitrogênio e finalmente em imersão em nitrogênio. As amostras foram descongeladas após um período mínimo de um mês e meio, e novas análises realizadas aos 10, 40 e 80 minutos pós-descongelação. Foi observado que o sêmen fresco de C. jacchus e C.penicillata são semelhantes em muitos aspectos. O diluidor TEST gema de ovo com o glicerol tanto a 4 como a 6% de concentração não foi eficaz para a proteção dos espermatozoides das duas espécies durante a criopreservação. São necessários outros estudos para o desenvolvimento de um protocolo de criopreservação do sêmen das duas espécies. Contudo, este trabalho contém informações que podem nortear futuros estudos sobre a criopreservação do sêmen destas e de outras espécies de primatas neotropicais. / Studies on the reproductive biology of nonhuman primates are important for the development of reproductive biotechnologies, in order to species conservation. The aim of this study was to evaluate methods for sperm cryopreservation from Callithrix jacchus and C. penicillata. Semen was collected by penile vibrostimulation from adult animals kept in captivity. Immediately after collection, the variables analyzed were volume, pH, concentration, total and progressive motility, plasma membrane integrity, acrosome integrity, cytochemical mitochondrial activity, DNA fragmentation and morphology. The samples were then chilled in TEST egg yolk extender without glycerol; after this period, the glycerol was added at concentrations of 4 and 6% and further analyzes were performed. The semen was frozen in nitrogen vapour and finally immersion in nitrogen. After a minimum of one month and a half, the samples were thawed and further analysis performed at 10, 40 and 80 minutes after thawing. Fresh semen from C. jacchus and C. penicillata were found to be similar in many aspects. The extender TEST egg yolk with glycerol as much as 4 to 6% concentration was not effective for the protection of spermatozoa from both species during cryopreservation. Further studies are needed to develop a protocol for cryopreservation of semen from both species. However, this work contains information that can guide future studies on sperm cryopreservation of these and other Neotropical primates species.

In the last decade, there has been renewed interest in the use of granulocyte transfusions to treat infections in individuals with compromised immune systems. However, granulocytes only remain functional for about a day after isolation and this short shelf life is a significant drawback. Cryopreservation would allow long term storage of granulocytes, but an effective cryopreservation method is currently unavailable. The following study was performed to provide membrane permeability values for multiple cryoprotectants in hopes of aiding the optimization of cryoprotectant addition and removal and minimizing the detrimental effects of the process. The granulocytes were separated from whole blood using centrifugation with Polymorphprep as the separating agent. The cellular membrane permeability values were then measured using a Beckman Coulter Counter Multisizer 3 under custom setup conditions. The cryoprotectants studied were glycerol, DMSO, ethylene glycol, and propylene glycol at the respective total concentrations of 1, 2, 2, 1 Osm/kg at temperatures of 4, 21, and 37 °C. The resulting membrane solute permeability values at 20 °C reference temperature for DMSO, ethylene glycol, glycerol, and propylene glycol were respectively 5.96, 7.84, 0.950, and 3.45 um/min and the Arrhenius activation energies were respectively 60.4, 58.7, 68.2, and 62.3 kJ/mol. The resulting hydraulic permeability values in the same order and temperature were 0.196, 0.189, 0.259, and 0.113 um/(atm min) and the Arrhenius activation energies were respectively 56.3, 60.7, 68.5, and 47.1 kJ/mol. It is anticipated that these permeability values will aid in the development of successful cryopreservation procedures for granulocytes. / Graduation date: 2013

This study determined the effects of sucrose and sorbitol as cryoprotectant (CR) on the quality and sensory attributes of bone-in hams (N=90) injected (20% of weight) with following brine treatments (BT): control (2% sucrose; CNT), 2% CR (1% sucrose, 1% sorbitol), 4% CR (2% sucrose, 2% sorbitol). Hams that were frozen and injected with CNT after thawing (FZ I) were used as a negative control. After reaching the designated ST all bone-in hams were thawed under refrigeration (4oC) and FZ I hams were then injected with CNT (n=8). Hams were cooked to 70oC, chilled (7oC), sliced, vacuum packaged and analyzed for lipid oxidation, color, protein solubility and purge at 0, 28, and 56 of refrigerated storage while sensory evaluation and shear force determinations were conducted at 28 d. Color, pH, and lipid oxidation values tended to remain similar or decrease as frozen storage time increased. Water holding capacity (percent bound water) and protein solubility increased as frozen storage increased. The 4% CR BT exhibited the lowest shear force value (4.04 N/g) but was not statistically different than CNT or FZ I on ham knuckle muscles. Trained sensory panelists found hammy and salty were the strongest flavor and basic taste attributes. The results of this study confirm that quality attributes and protein functionality were maintained but not significantly improved by injecting a brine solution with cryoprotectants prior to freezing.

The Amyloodinium ocellatum was collected from cobia ( Rachycentron canadum ) gill and four tests including 4 ¢J storage, toxicity of cryoprotectant, cryopreservation and in vitro cultivation on fish cell line were conducted to establish the methods of preservation of Amyloodinium ocellatum. Survival of trophont, morphology and division of tomont and number of dinospore released were evaluated the effects of this study. The results showed that division irregulated, delayed and stopped of the tomont were found after stored at 4 ¢J over 48 hours. It was produced 1.08 x 10 4 cell/ml dinospores from 1 x 10 3 trophont at 4 ¢J, 24 hours storage group and significant higher ( p¡Õ0.0001 ) than other storage groups. For the toxicity of cryoprotectant, the concentration of DMSO 3~10¢M, Glycerol 3~10¢M, Methanol 3~10¢M, Ethanol 3~5¢M, PrOH 3~5¢M, DMAc 3~5¢M, Sucrose 3~15¢M, Trehalose 3~15¢M, Dextran 3~5¢Mand Ficoll 3~10¢Mwere safety to use on A. ocellatum trophont preservation. It was unsuccessful to cryopreserve the trophont of A. ocellatum when stored at direct liquid N2 freezing, different -20 ¢J freezing time, -1 ¢J min-1 freezing container and different cryoprotectant equilibration time contain 10¢MGlycerol and DMSO, respectively. Using the U-shaped tube of sigle and double loop could gain pure and bacteria-free dinospores. The results of in vitro cultivation of A. ocellatum showed that eel epidermis and cobia fin cell line with different culture mediums were unable to grow the trophont and tomont of A. ocellatum.

[EN] Cryopreserved boar sperm is not used extensively for artificial insemination due to poor fertility rates of the sperm after freezing and thawing. The sperm membrane is damaged when cooled from body temperature to 5 ºC (cold shock), as well as during the freeze-thaw process. Increasing the cholesterol content of boar sperm membranes could increase their post-thaw survival, similarly to other species that are cold shock sensitive. Cholesterol can be easily added to sperm membranes using cholesterol-loaded cyclodextrins (CLC). Treating sperm from different species susceptible to cold-shock with CLC before cryopreservation improves sperm cryosurvival. Egg yolk and glycerol are common constituents of extenders used for boar sperm cryopreservation. However, conventional freezing extenders could not be the appropriate for CLC-treated sperm. The aim of this Thesis is to evaluate cryosurvival of CLC or cyclodextrin-treated boar sperm in three different conditions: using conventional freezing extenders, using extenders with alternative concentrations of glycerol and egg yolk and using amides as cryoprotectants. CLC or methyl- ß-cyclodextrin treatment (1 mg/120 x 106 sperm) prior to cryopreservation using a conventional freezing extenders provided either slight or no benefit, respectively, to post-thaw sperm plasma membrane integrity (+ 8%; P < 0.05) and motility (P > 0.05). In addition, sperm from both, good and poor freezers, responded similarly to CLC treatment (P > 0.05). Reduction in egg yolk concentration from 20 to 10% was detrimental for post-thaw sperm viability, even in semen treated with CLC (- 12%; P < 0.05). On the other hand, it was observed that traditional concentration of glycerol (3%) was not the appropriate to freeze CLC-treated sperm (- 13% viable sperm compared to control; P < 0.05). Thus, CLC-treated sperm showed a higher tolerance (+ 13 % sperm viability; P < 0.05) to high glycerol concentrations (5%) than non-treated sperm. Regarding the efficacy of amides as cryoprotectants, three of the amides (lactamide, acetamide and formamide) produced deleterious effects in fresh boar sperm (P < 0.05). The other amides (methylformamide, dimethylacetamide and dimethylformamide) efficiently improved post-thaw sperm viability (+ 5 to 15 %; P < 0.05) but negatively affected the sperm motility (- 11 to 16% total motile sperm; P < 0.05) and the sperm fertilizing ability in vitro (dimethylformamide: - 64 % penetration rate; P < 0.05), irrespective of the sperm treatment. On the other hand, CLC-treated samples showed better in vitro fertilizing ability than control samples when glycerol was used as cryoprotectant (+ 2 penetrated spermatozoa/oocyte; P < 0.05). The results obtained in this Thesis suggest that conventional freezing protocols should be optimized for CLC-treated boar sperm in order to obtain the benefit of CLC treatment observed in other species sensitive to cold shock. / [ES] Las inseminaciones artificiales en la especie porcina se realizan habitualmente con semen refrigerado, debido a las bajas tasas de fertilidad obtenidas con el semen congelado-descongelado. La membrana del espermatozoide sufre importantes daños cuando es sometida a la fase de enfriamiento desde la temperatura corporal hasta alcanzar los 5 ºC (choque térmico), así como durante el proceso de congelación y descongelación. El aumento del contenido de colesterol en las membranas de los espermatozoides de cerdo podría mejorar su supervivencia tras la descongelación, como sucede en otras especies sensibles al choque térmico. Este incremento en la cantidad de colesterol se puede realizar fácilmente utilizando ciclodextrinas saturadas de colesterol (CLC). El tratamiento con CLC de espermatozoides de varias especies susceptibles al choque térmico antes de la congelación ha conseguido mejorar su supervivencia tras la descongelación. En los protocolos convencionales de congelación de semen porcino se utilizan habitualmente diluyentes de congelación compuestos por yema de huevo y glicerol, sin embargo, puede que estos diluyentes de congelación convencionales no sean los más apropiados para congelar espermatozoides tratados con CLC. El objetivo de esta Tesis es evaluar la supervivencia a la congelación de los espermatozoides porcinos tratados con CLC o ciclodextrinas utilizando diluyentes de congelación convencionales, utilizando concentraciones alternativas tanto de yema de huevo como de glicerol o utilizando amidas en lugar de glicerol como crioprotectores Utilizando diluyentes convencionales, el tratamiento con 1mg de CLC o de metil-ß-ciclodextrina/120 millones de espermatozoides previamente a la congelación proporcionó una leve mejora de la integridad de la membrana plasmática espermática (+ 8%; P < 0,05) y ningún beneficio sobre la movilidad espermática (P > 0,05). Además, la respuesta al tratamiento con CLC fue similar independientemente de si los espermatozoides procedían de verracos buenos o malos congeladores (P > 0,05). Una reducción de la concentración de yema de huevo de un 20 a un 10% fue perjudicial para la supervivencia de los espermatozoides tras la descongelación, incluidos aquellos que habían sido tratados previamente con CLC (- 12% espermatozoides vivos; P < 0,05). Por otro lado, observamos que las concentraciones de glicerol utilizadas habitualmente (3%) no son las más apropiadas para congelar espermatozoides tratados con CLC (- 13 % viabilidad espermática comparando con las muestras control; P < 0,05), ya que éstos mostraron una mayor tolerancia (+ 13 % espermatozoides vivos; P < 0,05) que las muestras control a las concentraciones de glicerol más altas (5%). Con respecto a la eficacia de las amidas como crioprotectores para semen porcino, tres de las amidas (lactamida, acetamida y formamida) produjeron efectos perjudiciales durante su incubación con semen fresco (P < 0,05). El resto de amidas evaluadas (metilformamida, dimetilacetamida y dimetilformamida) mejoraron eficientemente la viabilidad espermática tras la congelación (+ 5 a 15 %; P < 0,05), sin embargo, afectaron negativamente tanto la movilidad espermática (- 11 a 16% móviles totales; P < 0,05) como la capacidad de fecundación in vitro (dimetilformamida: - 64 % en la tasa de penetración; P < 0,05), independientemente de si el semen fue tratado con CLC o no. Por otro lado, las muestras tratadas con CLC mostraron mejor capacidad de fecundación in vitro que las muestras control cuando se utilizó el glicerol como crioprotector (+ 2 espermatozoides penetrados/ovocito; P < 0,05). Los resultados obtenidos en esta Tesis sugieren que sería necesaria la adecuación de los protocolos de congelación convencionales para congelar semen porcino tratado con CLC con el propósito de alcanzar los claros beneficios obtenidos con dicho tratamiento cuando ha sido evaluado en otras especies sensibles al choque térmico. / [CAT] Les inseminacions artificials en l'espècie porcina es realitzen habitualment amb semen refrigerat, a causa de les baixes taxes de fertilitat obtingudes amb el semen congelat-descongelat. La membrana de l'espermatozoide pateix importants danys quan és sotmesa a la fase de refredament des de la temperatura corporal fins a arribar als 5 ºC (xoc tèrmic), així com durant el procés de congelació i descongelació. L'augment del contingut de colesterol a les membranes dels espermatozoides de porc podria millorar la seva supervivència després de la descongelació, com succeeix en altres espècies sensibles al xoc tèrmic. Aquest increment en la quantitat de colesterol es pot realitzar fàcilment utilitzant ciclodextrines saturades de colesterol (CLC). El tractament amb CLC d'espermatozoides de diverses espècies susceptibles al xoc tèrmic abans de la congelació ha aconseguit millorar la seva supervivència després de la descongelació. En els protocols convencionals de congelació de semen porcí s'utilitzen habitualment diluents de congelació compostos per rovell d'ou i glicerol, però, pot ser que aquests diluents de congelació convencionals no siguin els més apropiats per congelar espermatozoides tractats amb CLC. L'objectiu d'aquesta Tesi és avaluar la supervivència a la congelació dels espermatozoides porcins tractats amb CLC o ciclodextrines utilitzant diluents de congelació convencionals, utilitzant concentracions alternatives tant de rovell d'ou com de glicerol o utilitzant amides en lloc de glicerol com crioprotectors Utilitzant diluents convencionals, el tractament amb 1 mg de CLC o de metil-ß-ciclodextrina / 120 milions d'espermatozoides prèviament a la congelació va proporcionar una lleu millora de la integritat de la membrana plasmàtica espermàtica (+ 8%; P <0,05) i cap benefici sobre la mobilitat espermàtica (P> 0,05). A més, la resposta al tractament amb CLC va ser similar independentment de si els espermatozoides procedien de verros bons o dolents congeladors (P> 0,05). Una reducció de la concentració de rovell d'ou d'un 20 a un 10% va ser perjudicial per a la supervivència dels espermatozoides després de la descongelació, inclosos aquells que havien estat tractats prèviament amb CLC (- el 12% espermatozoides vius; P <0,05) . D'altra banda, observem que les concentracions de glicerol utilitzades habitualment (3%) no són les més apropiades per congelar espermatozoides tractats amb CLC (- 13% viabilitat espermàtica comparant amb les mostres control; P <0,05), ja que aquests van mostrar una major tolerància (+ 13% espermatozoides vius; P <0,05) que les mostres control a les concentracions de glicerol més altes (5%). Pel que fa a l'eficàcia de les amides com crioprotectors per semen porcí, tres de les amides (lactamida, acetamida i formamida) van produir efectes perjudicials durant la seva incubació amb semen fresc (P <0,05). La resta de amides avaluades (metilformamida, dimetilacetamida i dimetilformamida) van millorar eficientment la viabilitat espermàtica després de la congelació (+ 5 a 15%, P <0,05), però, van afectar negativament tant la mobilitat espermàtica (- 11 a 16% mòbils totals; P <0,05) com la capacitat de fecundació in vitro (dimetilformamida: - el 64% en la taxa de penetració; P <0,05), independentment de si el semen va ser tractat amb CLC o no. D'altra banda, les mostres tractades amb CLC van mostrar millor capacitat de fecundació in vitro que les mostres control quan es va utilitzar el glicerol com crioprotector (+ 2 espermatozous penetrats / oòcit; P <0,05). Els resultats obtinguts en aquesta Tesi suggereixen que seria necessària l'adequació dels protocols de congelació convencionals per congelar semen porcí tractat amb CLC amb el propòsit d'assolir els clars beneficis obtinguts amb el tractament quan ha estat avaluat en altres espècies sensibles al xoc tèrmic. / Blanch Torres, E. (2015). Treating boar sperm with cholesterol-loaded cyclodextrins or cyclodextrins prior to cryopreservation: effects on post-thaw in vitro sperm quality of sperm cryopreserved in different freezing extenders [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/58773 / TESIS

In this thesis, we report on our studies of water dynamics and structure in various biological environments which include: the surfaces of proteins and various oligosaccharides, the intervening space between proteins; and in the vicinity of cryoprotectant disaccharides in the liquid and ice phases. From a theoretical perspective, we propose methodology to compute diffusivity and residence times on the surface of biomolecules. In particular our proposed algorithm to compute residence times appears to be better in dealing with poor statistics associated with the number of water molecules that remain on a surfaces for extended times. The type of linkage between monomers and the anomeric configuration all play a major role in determining the structure and dynamics of water on the surface of carbohydrates.

Cryopreservation is currently the only method allowing for the long-term preservation of hematopoietic stem and progenitor cell (HSPC) grafts until their use. However, cryoinjuries reduce cell viability and potency of HSPC. New cryoprotectant (CPA) solutions have recently emerged that have not yet been investigated that may improve the cryopreservation of HSPCs. The overarching hypothesis of the work described in this thesis, is that different CPAs have diverse impact on the key biochemical processes essential for HSPC homeostasis which influences post thaw cell viability and potency. To test this hypothesis, 4 CPAs were extensively characterized for their cryoprotective properties on cord blood (CB) HSPCs in comparison to DMSO control. CryoProtectPure (CPP) supported similar post thaw cell viability and engraftment as DMSO control, whereas pentaisomaltose (PIM) and cryonovo (CN) failed as CPAs for HSPCs. Subsequently, the impact of CPAs on key biological pathways was explored to identify potential biochemical pathways implicated in HSPC cryopreservation. The impact of CPAs on cell membrane integrity, oxidative phosphorylation, glycolysis, and autophagy was examined. CPP and DMSO had varying impact on glycolytic and mitochondrial respiratory activities of HSPCs post-thaw, whereas both CPAs as well as PIM and CN had negligible impact on cell membrane parameters prefreeze. Cryopreservation and thawing strongly induced autophagy in HSPCs. Importantly, early inhibition of autophagy with 3-Methyladenine (3-MA) reduced the recovery of functional CB HSPCs post thaw. Together, my findings provide new insights regarding the biological processes impacted by CPAs and cryopreservation of HSPCs and identify potential targets to improve cryopreservation of HSC grafts.

No description available.