Effects of cryoprotective agents and treatment methods on sperm cryopreservation of stone flounder, Kareius bicoloratus

Aquaculture ◽  
2021 ◽  
Vol 531 ◽  
pp. 735969 ◽  
Author(s):  
Yun Ho Lee ◽  
Jung Yeol Park ◽  
Il Young Lee ◽  
Irfan Zidni ◽  
Han Kyu Lim
Andrologia ◽  
2012 ◽  
Vol 44 ◽  
pp. 154-159 ◽  
Author(s):  
R. A. Forero-Gonzalez ◽  
E. C. C. Celeghini ◽  
C. F. Raphael ◽  
A. F. C. Andrade ◽  
F. F. Bressan ◽  
...  

2017 ◽  
Vol 33 (1) ◽  
pp. 1-6
Author(s):  
Sungwon Kang ◽  
Jae Geun Lim ◽  
Seung Cheon Seon ◽  
Kyeong Sig Lee ◽  
Jiheon Kim ◽  
...  

Cells ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1435
Author(s):  
Hiroki Takeuchi ◽  
Mikiko Nishioka ◽  
Tadashi Maezawa ◽  
Yuko Kitano ◽  
Kento Terada-Yoshikawa ◽  
...  

In human sperm cryopreservation, test yolk buffer and human serum albumin have been used as permeating macromolecular-weight cryoprotectants. In clinical reproductive medicine, human serum albumin is frequently used because of low risks of zoonoses and allergic reactions. However, the risk of allogeneic infectious diseases exists, and the supply may be unstable because human serum albumin is derived from human blood. Therefore, the development of xeno-free human sperm cryopreservative reagents that could overcome the aforementioned problems is warranted. We succeeded in developing a new xeno-free and defined sperm cryopreservation reagent containing glycerol, carboxylated poly-l-lysine, and raffinose. The cryopreservation reagent was not significantly different in terms of sperm motility, viability, and DNA fragmentation and was comparable in performance to a commercial cryopreservation reagent containing human serum albumin. Moreover, the addition of saccharides was essential for its long-term storage. These results may help elucidate the unknown function of macromolecular-weight permeating cryoprotective agents.


Author(s):  
G. G. Cocks ◽  
C. E. Cluthe

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.


2020 ◽  
pp. 82-94 ◽  
Author(s):  
V. O. Belash ◽  
L. R. Urazgalieva ◽  
R. I. Fayzullina ◽  
L. G. Agasarov

Introduction. Degenerative-dystrophic changes in the spine are the most common chronic human diseases. Pronounced clinical manifestations of vertebrogenic diseases are observed during active labor activity and represent one of the most frequent causes of temporary disability. It is also known that any pain syndromes are accompanied by the development of psychovegetative disorders, which reduces the effectiveness of treatment. In recent years, there has been a reasonable increase in the interest of the medical community to the non-drug treatment methods. It is caused by the polypharmacotherapy side effects, an increased numbers of allergic reactions, problems with polypragmasia, and a low level of compliance. At the same time, the question of the possibility of various non-drug treatment methods combining is quite acute.The goal of research is to substantiate the clinical effectiveness of the combined application of osteopathic correction and reflexotherapy in the complex treatment of patients with dorsopathy at the cervical-thoracic level.Materials and methods. A prospective controlled randomized study was conducted on the basis of the medical clinics of LLC «Family Health» (Kazan) and ANO «Center for SEB assistance» (Kazan) from April 2018 to May 2019. The study involved 52 people with dorsopathy at the cervical-thoracic level, aged from 25 to 45 years. In accordance with the exclusion criteria, 7 people dropped out of the study. The remaining patients (45 people), depending on the used treatment method, were divided by a simple randomization method using a random number generator into three groups of 15 people. The first group (main group) received osteopathic correction and reflexotherapyon the background of standard drug therapy; the second and the third groups (control groups) received only osteopathic correction orreflexotherapy, respectively, on the background of standard drug therapy. The osteopathic examination was performed for all patients regardless of the group, before and after the course of therapy, with the formation of an osteopathic conclusion.Also there was the estimation of the degree of pain syndrome severity,the asthenia, and the degree of accumulated emotional and energy charge that does not get out in a person.Results. It was found in the course of the study that the inclusion of osteopathic correction and reflexotherapy in the complex therapy of patients with dorsopathy at the cervical-thoracic level is clinically more effective than the isolated use of these methods. Such complex therapy allows to achieve a more significant reduction in the severity of the pain syndrome by VAS (p<0,05), relief of internal emotional tension (p<0,05), and increase the effectiveness of correction of dominant somatic dysfunction. Based on the obtained data, it could be assumed that reflexotherapy potentiates the effects of osteopathic correction.Conclusion. Based on the study, it can be concluded that the combination of osteopathic correction and reflexotherapy in the treatment of patients with dorsopathy at the cervical-thoracic level increases the clinical effectiveness of the standard drug therapy. At the same time, it is worth noting the potentiating effect of the combined use of two non-medicinal methods. The question of combining of various non-drug treatment methods is quite acute today, so this study will be continued. 


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