scholarly journals Metabolic phenotype of adult mice offspring obtained from different variants of embryo transfer

2020 ◽  
Vol 24 (7) ◽  
pp. 761-769
Author(s):  
M. V. Anisimova ◽  
Ya. Gong ◽  
N. S. Yudin ◽  
Yu. M. Moshkin ◽  
L. A. Gerlinskaya
Keyword(s):  
Assisted Reproductive Technologies ◽  
Physiological State ◽  
Developed Countries ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Metabolic Phenotype ◽  
Laboratory Animals ◽  
Glucose Load ◽  
Body Compositions ◽  
Sexually Mature

Assisted reproductive technologies (ART) increasingly occupy the study of human reproduction. In addition, in developed countries they contribute to breeding of more than 50 % of cattle. In the management of collections of genetic lines of laboratory animals, these technologies are obligatory components of cryopreservation and rederivation. ART procedures include the development of early embryos outside the mother’s body and the high probability of incomplete synchronization of the physiological state of the surrogate mother and transplanted embryos. Since all this occurs at the stage of the highest susceptibility of embryos to epigenetic reprogramming, the full cycle of ART and its individual components can lead to stable phenotypic changes in the offspring. Their reality is confirmed by studies of the morphological and functional characteristics of sexually mature offspring of CD1 outbred mice, obtained using different variants of early embryo transplantation. Comparative studies of body mass and body composition, basal glucose level and response to glucose load (glucose-tolerance test – GTT) have been done on sexually mature males and females. Animals were separated in 4 groups according to the variant of embryo transplantation: group (control) – natural mating; group (2cl-bl) – incubation of 2-cell up to blastocysts; group (2cl-2cl) – removal and transplantation of the 2-cell embryo without incubation; group (Bl-bl) removal and transplantation of the blastocysts without incubation. All embryos were transplanted to recipient females of the same line. It was found that sexually mature offspring obtained with all variants of transplantations had a higher relative fat content and, correspondingly, lower lean mass compared to the control. This effect was more pronounced in females than in males. Unlike body compositions, embryo transplantations had a greater effect on basal glucose concentration and GTT in males than in females. In this case, the offspring of the 2cl-2cl and 2cl-bl groups were characterized by a higher tolerance to glucose load (GTT) compared with the control and the Bl-bl group. Stable deviations of body compositions and glucose homeostasis indices detected in experimental groups of progenies indicate the phenotypic significance of the embryo transplantations per se.

scholarly journals Assisted Reproductive Technologies as Veritable Tools for Improving Production Efficiencies of N’dama and Muturu Cattle Breeds in Nigeria-A Review

2021 ◽  
Author(s):  
Cornelius Nwoga ◽  
Nnanna Ikeh ◽  
Matthew Onodugo ◽  
Paul Baiyeri ◽  
Ndubuisi Machebe
Keyword(s):  
Artificial Insemination ◽  
Assisted Reproductive Technologies ◽  
Developed Countries ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Vitro Fertilization ◽  
Beef Cow ◽  
Cattle Breeds ◽  
Multiple Ovulation

Assisted reproductive technologies (ART) that have come to stay and are still being improved upon in developed countries are still in their infancy stage in developing countries like Nigeria. Nigeria’s cattle population is estimated to be around 18.4 million. The number is far insufficient to meet the country’s demand for meat, milk, and other cow products, let alone contribute to GDP. N’dama and Muturu are both Nigerian breeds that are resistant to trypanosomosis. They are humpless longhorn and humpless shorthorn types of beef cattle. The dairy and beef cow industries’ inadequate adoption of ART is partly to blame for Nigeria’s low cattle output. Sex determination, multiple-ovulation and embryo transfer (MOET), oestrus synchronization, artificial insemination (AI), in vitro fertilization (IVF), cloning, and genetic engineering are all examples of assisted reproductive technologies. It has been reported in humans, rodents and domestic animals, abnormal fetuses, newborns and adult offspring arise from ART. Improper matching of breeding animals mostly leads to overfat calves. This review centers on the applications and potentials of ART in the production of trypanotolerant N’dama and Muturu cattle breeds. Some unorthodox medicines which have proven effective in human reproduction can circumvent the shortfalls in the adoption of ART.

scholarly journals Inositol and vitamin D may naturally protect human reproduction and women undergoing assisted reproduction from COVID-19 risk

2021 ◽  
pp. 113-117
Author(s):  
M.S. Bezerra Espinola ◽  
M. Bertelli ◽  
M. Bizzarri
Keyword(s):  
Vitamin D ◽  
Immune System ◽  
Pregnant Women ◽  
Assisted Reproductive Technologies ◽  
Respiratory Infections ◽  
Phosphatidyl Inositol ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Risk Category ◽  
Virus Species

In late 2019, the new Coronavirus has been identified in the city of Wuhan (China) then COVID-19 spreads like wildfire in the rest of the world. Pregnant women represent a risk category for increased abortion rates and vertical transmission with adverse events on the newborns has been recently confirmed. The scientific world is struggling for finding an effective cure for counteracting symptomatology. Today, there are many therapeutic proposes but none of them can effectively counteract the infection. Moreover, many of these compounds show important side effects not justifying their use. Scientific literature reports an immune system over-reaction through interleukins- 6 activation. In this regard, the possibility to control the immune system represents a possible strategy for counteracting the onset of COVID-19 symptomatology. Vitamin D deficiency shows increased susceptibility to acute viral respiratory infections. Moreover, Vitamin D seems involved in host protection from different virus species by modulating activation and release of cytokines. Myo-inositol down-regulates the expression of IL-6 by phosphatidyl-inositol-3-kinase pathway. Furthermore, myo-inositol is the precursor of phospholipids in the surfactant and it is applied for inducing surfactant synthesis in infants for treating respiratory distress syndrome. This review aims to summarize the evidence about COVID-19 infection in pregnant women and to encourage the scientific community to investigate the use of Vitamin D and Myo-inositol which could represent a possible preventive treatment for pregnant women or women undergoing assisted reproductive technologies.

scholarly journals Microbiota and Human Reproduction: The Case of Female Infertility

2020 ◽  
Vol 9 (2) ◽  
pp. 12 ◽  
Author(s):  
Rossella Tomaiuolo ◽  
Iolanda Veneruso ◽  
Federica Cariati ◽  
Valeria D’Argenio
Keyword(s):  
Reproductive Tract ◽  
Assisted Reproductive Technologies ◽  
Embryo Implantation ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Microbial Dysbiosis ◽  
Technical Issues ◽  
Almost All ◽  
Generation Sequencing

During the last decade, the availability of next-generation sequencing-based approaches has revealed the presence of microbial communities in almost all the human body, including the reproductive tract. As for other body sites, this resident microbiota has been involved in the maintenance of a healthy status. As a consequence, alterations due to internal or external factors may lead to microbial dysbiosis and to the development of pathologies. Female reproductive microbiota has also been suggested to affect infertility, and it may play a key role in the success of assisted reproductive technologies, such as embryo implantation and pregnancy care. While the vaginal microbiota is well described, the uterine microbiota is underexplored. This could be due to technical issues, as the uterus is a low biomass environment. Here, we review the state of the art regarding the role of the female reproductive system microbiota in women’s health and human reproduction, highlighting its contribution to infertility.

scholarly journals Epigenetics and Neurological Disorders in ART

2019 ◽  
Vol 20 (17) ◽  
pp. 4169
Author(s):  
Marina La Rovere ◽  
Marica Franzago ◽  
Liborio Stuppia
Keyword(s):  
Neurological Disorders ◽  
Assisted Reproductive Technologies ◽  
Current Knowledge ◽  
Developed Countries ◽  
Reproductive Technologies ◽  
Epigenetic Modifications ◽  
Epigenetic Alterations ◽  
Long Term Effects ◽  
Increased Risk

About 1–4% of children are currently generated by Assisted Reproductive Technologies (ART) in developed countries. These babies show only a slightly increased risk of neonatal malformations. However, follow-up studies have suggested a higher susceptibility to multifactorial, adult onset disorders like obesity, diabetes and cardiovascular diseases in ART offspring. It has been suggested that these conditions could be the consequence of epigenetic, alterations, due to artificial manipulations of gametes and embryos potentially able to alter epigenetic stability during zygote reprogramming. In the last years, epigenetic alterations have been invoked as a possible cause of increased risk of neurological disorders, but at present the link between epigenetic modifications and long-term effects in terms of neurological diseases in ART children remains unclear, due to the short follow up limiting retrospective studies. In this review, we summarize the current knowledge about neurological disorders promoted by epigenetics alterations in ART. Based on data currently available, it is possible to conclude that little, if any, evidence of an increased risk of neurological disorders in ART conceived children is provided. Most important, the large majority of reports appears to be limited to epidemiological studies, not providing any experimental evidence about epigenetic modifications responsible for an increased risk.

The influence of disordered fat metabolism on male fertility at the reproductive age and the effectiveness of the ECF programs

2014 ◽  
Vol 60 (5) ◽  
pp. 34-42 ◽  
Author(s):  
Irina I Vityazeva ◽  
Mariya V Altashina ◽  
Ekaterina A Troshina
Keyword(s):  
Male Fertility ◽  
Assisted Reproductive Technologies ◽  
Fat Metabolism ◽  
Developed Countries ◽  
Reproductive Technologies ◽  
Negative Influence ◽  
Reproductive Age ◽  
Excessive Body Weight ◽  
Prevalence Of Obesity ◽  
The Developed Countries

The excessive body weight and obesity in the men of the reproductive age exert the negative influence on their reproductive system and can promote the development of infertility. The high prevalence of obesity and the reduction of the birth rate in the developed countries stimulate the extensive investigations into the mechanisms by which the excess adipose tissue affects male fertility. The authors overview the literature publications concerning the hormonal profile and the adipokine level, as well as disturbance of spermatogenesis in the men with disordered fat metabolism with special reference to the peculiarities of the management of infertility with the application of the assisted reproductive technologies.

Ex vivo early embryo development and effects on gene expression and imprinting

2005 ◽  
Vol 17 (3) ◽  
pp. 361 ◽  
Author(s):  
David K. Gardner ◽  
Michelle Lane
Keyword(s):  
Gene Expression ◽  
Embryo Development ◽  
Assisted Reproductive Technologies ◽  
Ex Vivo ◽  
Reproductive Technologies ◽  
Developmental Competence ◽  
Laboratory Animals ◽  
Cell Physiology ◽  
Mammalian Embryo

The environment to which the mammalian embryo is exposed during the preimplantation period of development has a profound effect on the physiology and viability of the conceptus. It has been demonstrated that conditions that alter gene expression, and in some instances the imprinting status of specific genes, have all previously been shown to adversely affect cell physiology. Thus, questions are raised regarding the aetiology of abnormal gene expression and altered imprinting patterns, and whether problems can be averted by using more physiological culture conditions. It is also of note that the sensitivity of the embryo to its surroundings decreases as development proceeds. Post compaction, environmental conditions have a lesser effect on gene function. This, therefore, has implications regarding the conditions used for IVF and the culture of the cleavage stage embryo. The developmental competence of the oocyte also impacts gene expression in the embryo, and therefore superovulation has been implicated in abnormal methylation and imprinting in the resultant embryo. Furthermore, the genetics and dietary status of the mother have a profound impact on embryo development and gene expression. The significance of specific animal models for human assisted reproductive technologies (ART) is questioned, given that most cattle data have been obtained from in vitro-matured oocytes and that genes imprinted in domestic and laboratory animals are not necessarily imprinted in the human. Patients treated with ART have fertility problems, which in turn may predispose their gametes or embryos to greater sensitivities to the process of ART. Whether this is from the drugs involved in the ovulation induction or from the IVF, intracytoplasmic sperm injection or culture procedures themselves remains to be determined. Alternatively, it may be that epigenetic alterations are associated with infertility and symptoms are subsequently revealed through ART. Whatever the aetiology, continued long-term monitoring of the children conceived through ART is warranted.

scholarly journals Legal Responsibility for Abuses and Crimes in the Field of Artificial Human Reproduction

Lex Russica ◽  
2019 ◽  
pp. 48-52
Author(s):  
N. V. Kruchinina
Keyword(s):  
Human Rights ◽  
Assisted Reproductive Technologies ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Legal Responsibility ◽  
Human Beings ◽  
Artificial Reproduction ◽  
Forensic Research ◽  
Human Reproductive ◽  
Common Understanding

The article analyzes different points of view concerning reproductive human rights. Every year the number of cases when assisted reproductive technologies are used is increasing in Russia. The author draws attention to the lack of a common understanding of reproductive human rights, their protection and regulation in different countries of the world, to different perceptions of legal responsibility for abuses in the field of artificial reproduction of human beings, and to the existence of different definitions of crime in the field of human reproduction.The article presents an overview of foreign legislation on criminal law protection of human reproductive functions. The study of criminal and civil cases and examination of scientific developments in this area compels the author to admit the existence of abuses and crimes in the field of artificial reproduction of human beings. The article attempts to determine the list of crimes against reproductive human rights and considers them as an object of forensic research.

scholarly journals EPIDEMIOLOGY AND RISK FACTORS FOR PREMATURE BIRTH

2018 ◽  
Vol 28 (2) ◽  
pp. 629-636
Author(s):  
Anna Mihaylova ◽  
Nikoleta Parahuleva ◽  
Elina Petkova-Gueorguieva ◽  
Stanislav Gueorguiev
Keyword(s):  
Risk Factors ◽  
Preterm Birth ◽  
Prenatal Care ◽  
Premature Birth ◽  
Assisted Reproductive Technologies ◽  
Preterm Births ◽  
Developed Countries ◽  
Reproductive Technologies ◽  
Risk Indicators ◽  
Etiological Factors

Premature birth is a significant medical, social and economic problem worldwide. In the 21st Century in developed countries, this problem accounts for over two thirds of neonatal deaths. In Bulgaria, statistics show that 10-12% of all pregnancies end with premature birth. Despite the number of studies in this field and the efforts made by obstetricians and gynecologists, the tendency to increase the number of preterm births has continued in the last decade. Its consequences are multiple complications who lead to a high neonatal mortality in the national and global world. Preterm birth is characterized by complex and vague etiology. A specific cause of premature birth can not be defined, but a set of risk factors is considered, divided into three main groups of etiological factors: socio-economic, medical-biological, and behavioral. Associated with preterm birth socio-economic and behavioral risk factors include poverty, unemployment, low education, poor prenatal care, harmful habits such as smoking, alcohol, drugs and other harmful substances, unhealthy family environment, severe and prolonged stress, excessive physical exercise (lifting weights), trauma (hits or violence), new pregnancies less than 6 months after previous birth, unhealthy diet and low mother BMI, etc. Essential for the preterm birth is also the medico - biological etiological factors. One of these is uterine enlargement, as the main reason for this may be the presence of: multiple pregnancies that occurred naturally or after using assisted reproductive technologies or polyhydramnios (increased amount of amniotic fluid). Other risk factors include: placenta previa, incorrect position of the fetus, myoma, uterine cervix malformations (including cerebrovascular insufficiency), preeclampsia, uterine contractions, acute infections during pregnancy (vaginal - chlamydia, trichomonas, mycoplasma , toxoplasmosis, bacterial vaginosis, viral rubella, cytomegalovirus, herpes, influenza, adenovirus infection, chronic diseases (hypertension, cardiovascular diseases, diseases of the lungs, liver or kidney anemia and etc.), genetic factors, previous premature birth, etc. These risk indicators are subject to detailed analysis in the work of a number of authors. To limit preterm births, a number of studies have been conducted to identify and identify the risk factors that are relevant to it. Identifying and recognizing their effects and impact leading to premature birth will significantly reduce the severe health, economic and social consequences as well as reduce the risk of neonatal death. In order to reduce the frequency of preterm births, adequate and specialized prenatal care is essential. They must be individually tailored for each particular case of pregnancy and take into account the complex of risk predispositions.

scholarly journals To understand the reproductive tract microbiome associated with infertility through metagenomics analysis

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Manisha Vajpeyee ◽  
Lokendra Bahadur Yadav ◽  
Shivam Tiwari ◽  
Parikshit Tank
Keyword(s):  
Reproductive Tract ◽  
Assisted Reproductive Technologies ◽  
Live Birth Rate ◽  
Reproductive Technologies ◽  
Female Reproductive Tract ◽  
Human Reproduction ◽  
Main Body ◽  
Fertility Treatments ◽  
Vaginal Tract ◽  
Human Illness

Abstract Background Knowledge of the microbiome is in its infancy in health and human illness, especially concerning human reproduction. We will be better able to treat dysbiosis of the reproductive tract clinically if it is better explained and understood. It has been shown that altered vaginal microbiota affects parturition, and its function is uncertain in assisted reproductive technologies. However, the effects of recognized microbes such as Mycoplasma tuberculosis, Chlamydia trachomatis, and Neisseria gonorrhoeae are well established, resulting in subclinical changes which are considered to be risk factors for infertility and poor reproductive outcomes. Main body Recent studies indicate that the vaginal tract comprises several different organisms of the microbiome. Some microbiota can play an important role not only in the reproductive tract but also in overall health. The microbiome of the female reproductive tract has been identified mainly based on studies that examine vaginal samples across many reproductive technologies, using a metagenomics approach. Conclusion Alteration of reproductive tract microbiota or presence of certain microbiota irrespective of the level of pathogenicity may interfere with fertilization, implantation, and subsequent embryo development. This may lead to failed fertility treatments and reduced live birth rate (LBR).

Acentriolar spindle assembly in mammalian female meiosis and the consequences of its perturbations on human reproduction

2021 ◽  
Author(s):  
Cecilia S Blengini ◽  
Karen Schindler
Keyword(s):  
Assisted Reproductive Technologies ◽  
Reproductive Technologies ◽  
Human Reproduction ◽  
Meiotic Spindle ◽  
Female Meiosis ◽  
Spindle Formation ◽  
Cellular Machinery ◽  
Meiotic Spindles ◽  
Mammalian Female ◽  
Oocyte Meiotic Maturation

Abstract The purpose of meiosis is to generate developmentally competent, haploid gametes with the correct number of chromosomes. For reasons not completely understood, female meiosis is more prone to chromosome segregation errors than meiosis in males, leading to an abnormal number of chromosomes, or aneuploidy, in gametes. Meiotic spindles are the cellular machinery essential for the proper segregation of chromosomes. One unique feature of spindle structures in female meiosis is spindles poles that lack centrioles. The process of building a meiotic spindle without centrioles is complex and requires precise coordination of different structural components, assembly factors, motor proteins, and signaling molecules at specific times and locations to regulate each step. In this review, we discuss the basics of spindle formation during oocyte meiotic maturation focusing on mouse and human studies. Finally, we review different factors that could alter the process of spindle formation and its stability. We conclude with a discussion of how different assisted reproductive technologies (ART) could affect spindles and the consequences these perturbations may have for subsequent embryo development.

Sign in / Sign up

Export Citation Format

Share Document