scholarly journals PROSPECTS OF APPLICATION OF ARTIFICIAL FERTILIZATION FOR OBTAINING PIG EMBRYOS IN VITRO

2020 ◽  
Vol 60 ◽  
pp. 116-124
Author(s):  
O. V. Shcherbak ◽  
O. Yu. Lyzohub
Keyword(s):  
Hyaluronic Acid ◽  
Artificial Insemination ◽  
Gene Pool ◽  
Mammalian Species ◽  
Genetic Material ◽  
Mature Oocyte ◽  
Sperm Nucleus ◽  
Sperm Head ◽  
Minimum Number

Literary data about the method using artificial insemination for receiving pigs’ embryos in vitro (intracytoplasmic injection spermatozoon in oocyte (ICSI – Intracytoplasmic sperm injection)) for application of such approach to preserve and improve the gene pool of domestic pig breeds were presented. In pig breeding there is a threat of extinction of breeds due to periodic outbreaks of infectious diseases. Scientists are constantly paying attention to the preservation of the gene pool of this species, but approaches to cryopreservation of gametes and embryos still do not provide stable and high results. Some biotechnological manipulations were only informative, although practical approaches to gene pool conservation are essential. The ICSI method is an artificial insemination of oocytes in vitro during which one spermatozoon is injected into a mature oocyte at the stage of metaphase II meiosis. It is currently well established on female oocytes, but for oocytes of other mammalian species remains insufficiently optimized to achieve the same percentage of fertilization and embryo formation. In our country there is very little data on the use of ICSI method for artificial insemination of animals, including pigs, although this method will increase the efficiency of fertilization and the formation of full-fledged pig embryos in vitro. It was shown that the level of blastocyst formation in pigs that were cleaved from thawed immature oocytes fertilized by ICSI was 5.2%. It has been proven that the efficiency of fertilization by a modified ICSI method increases when using hyaluronic acid for sperm selection called PICSI. Because only mature sperm have a receptor for hyaluronic acid, which is contained on the zona pellucida of the oocyte, so only mature spermatozoa are selected for fertilization. It has long been thought that damage to the head of the sperm leads to damage to the genetic material, which in turn leads to lack of fertilization or the formation of abnormal embryos. Therefore, among the requirements for ICSI the main was the damage of the tail and avoidance of the sperm head and neck injury. Disulfide bridges of the sperm head, which are formed through the passage through the epididymis, have been shown to make the sperm nucleus resistant to chemical and physical ruptures. Chinese scientists published in 2020 the results of studies on the treatment of oocytes during the ICSI procedure with urhodeoxycholic acid and showed that this approach increases the percentage of zygotes obtained. This phenomenon is explained by the ability of this substance to reduce oxidative stress caused during this procedure in the endoplasmic reticulum and prevent apoptosis. Thus, the ICSI method provides effective fertilization with the involvement of a minimum number of sperm, which is extremely convenient in working with extinct species and species that are on the verge of extinction. Our data on the application of the ICSI method with various modifications indicate the prospects for the application of the ICSI method for its implementation in practice.

The Genetics of Secrecy in Adoption, Artificial Insemination, and In Vitro Fertilization

1988 ◽  
Vol 14 (1) ◽  
pp. 109-124
Author(s):  
Ann T. Lamport
Keyword(s):  
Artificial Insemination ◽  
Medical Records ◽  
Genetic Material ◽  
Adoptive Parents ◽  
Birth Parents ◽  
Vitro Fertilization ◽  
Record Keeping ◽  
Children And Parents ◽  
Uniform Law

AbstractIn light of the significant role that heredity plays in many disease processes, statutes requiring strict secrecy with regard to medical records in cases of adoption, artificial insemination and in vitro fertilization should be reassessed. In adoption cases, attitudes concerning the adoptee’s ancestry have progressed over the century, but adoptees still are unable to access their records. The problem of inaccessibility is also apparent in medical genetics clinics where valuable genetic information, necessary for an accurate diagnosis, is unavailable to the clinic, the adoptive parents, and the birth parents.A uniform law which responds to these interests and problems should be promulgated. This Note discusses the need for better access to and availability of medical records. The Note proposes a Uniform Act and suggests that, at a minimum, it include a scheme for regulating the donation of genetic material, strong record-keeping requirements with respect to family histories and pedigrees, and finally, an open access provision for certain information for both children and parents.

scholarly journals Assisted reproductive technology in tropical animals: Case in Pasundan cattle genetic conservation and utilization

2021 ◽  
Vol 902 (1) ◽  
pp. 012036
Author(s):  
R Widyastuti ◽  
D N Pristihadi ◽  
S Prastowo ◽  
H Maheshwari ◽  
C Sumantri ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Assisted Reproductive Technology ◽  
Artificial Insemination ◽  
Genetic Material ◽  
Reproductive Technology ◽  
Sex Selection ◽  
Advanced Technology ◽  
Sperm Cryopreservation ◽  
Embryo Production

Abstract Pasundan cattle are native Indonesian cattle located in West Java, Indonesia. These cattle have a superior trait in reproductive performance although reared in extreme environmental conditions with low-quality of feed, and resistance to parasite diseases than other cattle breeds. However, the ability to maintain Pasundan cattle genetic diversity, avoiding inbreeding, keeping the population healthy, and high reproduction efficiency are among the significant challenges currently occurred. The application of assisted reproductive technology (ART) seems promising to overcome those challenges and would impact the efficiency of genetic diversity conservation and preservation. This review aims to present the possibility to use the available ART in Pasundan cattle. The ART reviewed are the advanced technology of sperm cryopreservation, sex selection, artificial insemination, and in vitro embryo production. The sperm cryopreservation combined with sperm sexing is the most promising technology to maximize the use of genetic material of Pasundan cattle. Moreover, sexed sperm would have a promising impact on artificial insemination and/or embryo production to increase the cattle population. Furthermore, to protect genetic diversity, it is possible to apply the artificial reproductive technique and sperm or embryos conservation for genetic utilization in the future.

scholarly journals Transcription of 4′-thioDNA templates to natural RNA in vitro and in mammalian cells

2015 ◽  
Vol 51 (37) ◽  
pp. 7887-7890 ◽  
Author(s):  
Hideto Maruyama ◽  
Kazuhiro Furukawa ◽  
Hiroyuki Kamiya ◽  
Noriaki Minakawa ◽  
Akira Matsuda
Keyword(s):  
Nucleic Acids ◽  
Mammalian Cells ◽  
Genetic Material ◽  
Rna Polymerases ◽  
Chemically Modified ◽  
Biological Studies ◽  
Modified Nucleic Acids

Synthetic chemically modified nucleic acids, which are compatible with DNA/RNA polymerases, have great potential as a genetic material for synthetic biological studies.

In Vitro Methods for the Assessment of L-Cysteine Conjugate Toxicity

1994 ◽  
Vol 22 (2) ◽  
pp. 72-80
Author(s):  
Lorraine D. Buckberry ◽  
Harriet J. Adcock ◽  
Jeremy Adler ◽  
Ian S. Blagbrough ◽  
Peter J. Gaskin ◽  
...  
Keyword(s):  
Mechanism Of Action ◽  
Mammalian Species ◽  
Mercapturic Acid ◽  
Assay Method ◽  
Cellular Toxicity ◽  
In Vitro Methods ◽  
Metabolic Route ◽  
Assay Methods ◽  
Chang Liver

L-Cysteine conjugates are normally metabolised via N-acetylation to produce a mercapturic acid. However, a recently identified metabolic route (C-S lysis) may lead to the generation of an unstable thiol which has been demonstrated to be responsible for toxicity in various mammalian species. Human Chang liver cells were challenged with a number of established L-cysteine conjugates. The cellular toxicity of these compounds was determined using a range of assay procedures, which provided differing information, depending on the assay method used. These observations were then investigated in order to establish which system would provide the most reliable indication of C-S lyase toxicity and whether any information on the mechanism of action could be obtained by these assay methods.

The Uniform Status of Children of Assisted Conception Act: Does It Protect the Best Interests of the Child in a Surrogate Arrangement?

1990 ◽  
Vol 16 (4) ◽  
pp. 525-553
Author(s):  
Mimi Yoon
Keyword(s):  
Artificial Insemination ◽  
Medical Technology ◽  
Well Being ◽  
Best Interests ◽  
Medical Procedures ◽  
Assisted Conception ◽  
Regulatory Scheme ◽  
Infertile Couples ◽  
Definition Of

Medical technology is easing the plight of many infertile couples by offering such reproductive alternatives as in vitro fertilization, artificial insemination and surrogacy. In response to the changes in our society's definition of family, wrought by scientific advances, the National Conference of Commissioners on Uniform States Laws promulgated the Uniform Status of Children of Assisted Conception Act. The purpose of this Act is to protect the interests of children born through extraordinary medical procedures. This Note analyzes the Act's provisions regarding surrogacy and focuses on how the Commission's regulatory scheme fails to protect the child's interests. The Act's alternative of voiding the surrogacy contract also does not protect the child's interests. A more complete regulatory scheme which protects the adult parties’ interests, as well as the child's, should be devised, as the adequacy of the adult parties’ protection ultimately affects the child's well-being.

Physicochemical characterization and in vitro antioxidant activity of hyaluronic acid produced by Streptococcus zooepidemicus CCT 7546

2021 ◽  
pp. 1-10
Author(s):  
Wilza Kímilly Vital de Paiva ◽  
Waleska Rayane Dantas Bezerra de Medeiros ◽  
Cristiane Fernandes de Assis ◽  
Everaldo Silvino dos Santos ◽  
Francisco Caninde de Sousa Júnior
Keyword(s):  
Antioxidant Activity ◽  
Hyaluronic Acid ◽  
Physicochemical Characterization ◽  
Streptococcus Zooepidemicus ◽  
In Vitro Antioxidant Activity

scholarly journals The cancer glycocalyx mediates intravascular adhesion and extravasation during metastatic dissemination

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Giovanni S. Offeddu ◽  
Cynthia Hajal ◽  
Colleen R. Foley ◽  
Zhengpeng Wan ◽  
Lina Ibrahim ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Tumor Cells ◽  
Cancer Progression ◽  
Vascular System ◽  
Migration And Invasion ◽  
Improve Patient Survival ◽  
Adhesive Interactions ◽  
Vitro Model ◽  
Metastatic Sites

AbstractThe glycocalyx on tumor cells has been recently identified as an important driver for cancer progression, possibly providing critical opportunities for treatment. Metastasis, in particular, is often the limiting step in the survival to cancer, yet our understanding of how tumor cells escape the vascular system to initiate metastatic sites remains limited. Using an in vitro model of the human microvasculature, we assess here the importance of the tumor and vascular glycocalyces during tumor cell extravasation. Through selective manipulation of individual components of the glycocalyx, we reveal a mechanism whereby tumor cells prepare an adhesive vascular niche by depositing components of the glycocalyx along the endothelium. Accumulated hyaluronic acid shed by tumor cells subsequently mediates adhesion to the endothelium via the glycoprotein CD44. Trans-endothelial migration and invasion into the stroma occurs through binding of the isoform CD44v to components of the sub-endothelial extra-cellular matrix. Targeting of the hyaluronic acid-CD44 glycocalyx complex results in significant reduction in the extravasation of tumor cells. These studies provide evidence of tumor cells repurposing the glycocalyx to promote adhesive interactions leading to cancer progression. Such glycocalyx-mediated mechanisms may be therapeutically targeted to hinder metastasis and improve patient survival.

scholarly journals Photocuring Hyaluronic Acid/Silk Fibroin Hydrogel Containing Curcumin Loaded CHITOSAN Nanoparticles for the Treatment of MG-63 Cells and ME3T3-E1 Cells

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2302
Author(s):  
Qingwen Yu ◽  
Zhiyuan Meng ◽  
Yichao Liu ◽  
Zehao Li ◽  
Xing Sun ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Bone Regeneration ◽  
Water Uptake ◽  
Silk Fibroin ◽  
Bone Repair ◽  
Ph Value ◽  
Chitosan Nanoparticles ◽  
Vitro Assay ◽  
Long Term Treatment

After an osteosarcoma excision, recurrence and bone defects are significant challenges for clinicians. In this study, the curcumin (Cur) loaded chitosan (CS) nanoparticles (CCNP) encapsulated silk fibroin (SF)/hyaluronic acid esterified by methacrylate (HAMA) (CCNPs-SF/HAMA) hydrogel for the osteosarcoma therapy and bone regeneration was developed by photocuring and ethanol treatment. The micro or nanofibers networks were observed in the CCNPs-SF/HAMA hydrogel. The FTIR results demonstrated that alcohol vapor treatment caused an increase in β-sheets of SF, resulting in the high compression stress and Young’s modulus of CCNPs-SF/HAMA hydrogel. According to the water uptake analysis, SF caused a slight decrease in water uptake of CCNPs-SF/HAMA hydrogel while CCNPs could enhance the water uptake of it. The swelling kinetic results showed that both the CCNPs and the SF increased the swelling ratio of CCNPs-SF/HAMA hydrogel. The accumulative release profile of CCNPs-SF/HAMA hydrogel showed that the release of Cur from CCNPs-SF/HAMA hydrogel was accelerated when pH value was decreased from 7.4 to 5.5. Besides, compared with CCNPs, the CCNPs-SF/HAMA hydrogel had a more sustainable drug release, which was beneficial for the long-term treatment of osteosarcoma. In vitro assay results indicated that CCNPs-SF/HAMA hydrogel with equivalent Cur concentration of 150 μg/mL possessed both the effect of anti-cancer and promoting the proliferation of osteoblasts. These results suggest that CCNPs-SF/HAMA hydrogel with superior physical properties and the bifunctional osteosarcoma therapy and bone repair may be an excellent candidate for local cancer therapy and bone regeneration.

scholarly journals Secreted KIAA1199 promotes the progression of rheumatoid arthritis by mediating hyaluronic acid degradation in an ANXA1-dependent manner

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wei Zhang ◽  
Guoyu Yin ◽  
Heping Zhao ◽  
Hanzhi Ling ◽  
Zhen Xie ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Hyaluronic Acid ◽  
Dependent Manner ◽  
Collagen Induced Arthritis ◽  
Intracellular Degradation ◽  
Main Pathway ◽  
First Time

AbstractIn inflamed joints, enhanced hyaluronic acid (HA) degradation is closely related to the pathogenesis of rheumatoid arthritis (RA). KIAA1199 has been identified as a hyaladherin that mediates the intracellular degradation of HA, but its extracellular function remains unclear. In this study, we found that the serum and synovial levels of secreted KIAA1199 (sKIAA1199) and low-molecular-weight HA (LMW-HA, MW < 100 kDa) in RA patients were significantly increased, and the positive correlation between them was shown for the first time. Of note, treatment with anti-KIAA1199 mAb effectively alleviated the severity of arthritis and reduced serum LMW-HA levels and cytokine secretion in collagen-induced arthritis (CIA) mice. In vitro, sKIAA1199 was shown to mediate exogenous HA degradation by attaching to the cell membrane of RA fibroblast-like synoviosytes (RA FLS). Furthermore, the HA-degrading activity of sKIAA1199 depended largely on its adhesion to the membrane, which was achieved by its G8 domain binding to ANXA1. In vivo, kiaa1199-KO mice exhibited greater resistance to collagen-induced arthritis. Interestingly, this resistance could be partially reversed by intra-articular injection of vectors encoding full-length KIAA1199 instead of G8-deleted KIAA119 mutant, which further confirmed the indispensable role of G8 domain in KIAA1199 involvement in RA pathological processes. Mechanically, the activation of NF-κB by interleukin-6 (IL-6) through PI3K/Akt signaling is suggested to be the main pathway to induce KIAA1199 expression in RA FLS. In conclusion, our study supported the contribution of sKIAA1199 to RA pathogenesis, providing a new therapeutic target for RA by blocking sKIAA1199-mediated HA degradation.

scholarly journals Novel Role for Albumin in Innate Immunity: Serum Albumin Inhibits the Growth of Blastomyces dermatitidis Yeast Form In Vitro

2003 ◽  
Vol 71 (11) ◽  
pp. 6648-6652 ◽  
Author(s):  
Steven Giles ◽  
Charles Czuprynski
Keyword(s):  
Molecular Weight ◽  
Inhibitory Activity ◽  
Mammalian Species ◽  
Blastomyces Dermatitidis ◽  
Low Molecular Weight ◽  
Rat Serum ◽  
Yeast Form ◽  
Domain Iii

ABSTRACT In this study we found that serum inhibitory activity against Blastomyces dermatitidis was principally mediated by albumin. This was confirmed in experiments using albumin from several mammalian species. Analbuminemic rat serum did not inhibit B. dermatitidis growth in vivo; however, the addition of albumin restored inhibitory activity. Inhibitory activity does not require albumin domain III and appears to involve binding of a low-molecular-weight yeast-derived growth factor.

Sign in / Sign up

Export Citation Format

Share Document