2023 február / February
http://hdl.handle.net/10832/3201
2024-03-28T21:26:42ZAz anti-Müller-hormon (AMH) mennyiségének összefüggése a petefészekképletekkel és a petesejttartalék kimerülésével kancában és tehénben
http://hdl.handle.net/10832/3288
Az anti-Müller-hormon (AMH) mennyiségének összefüggése a petefészekképletekkel és a petesejttartalék kimerülésével kancában és tehénben
Angyal, Eszter; Somoskői, Bence; Török, Dóra; Bordás, Lilla; Cseh, Sándor; Novotniné Dankó, Gabriella; Vincze, Boglárka
The main role of AMH is to induce the regression of the Mullerian duct during the
male sexual differentiation. However, in females, AMH is not expressed during
the period of sexual differentiation, this guarantees the proper development of
the female genital tract. In women and female animals, AMH expression can be
detected in the granulosa cells of early primary, preantral and small antral follicles
after birth. AMH regulates the follicle number and selection of the dominant
follicle during follicular waves. In the postnatal ovary, AMH plays a key role in the
recruitment of primordial follicles by preventing these follicles from joining the pool
of growing follicles before the selection process. Thus, AMH prevents premature
exhaustion of the ovarian follicle reserve.
Nowadays anti-Mullerian hormone is the subject of several research in human
reproductive biology, due to the fact that it is an indicator of fertility and reproductive
ageing. In the case of domestic animals, research in this direction is especially
important because fertility is often identified as the primary factor that hinders the
efficiency of livestock systems. It is important to emphasize that the effectiveness
of assisted reproduction techniques depends to a large extent on the physiological
parameters of the individual, such as the antral follicle population (AFP) of the
ovary. In this way, the efficiency of assisted reproduction techniques can be greatly
diminished by the great variability in the number of antral follicles of the donors.
AMH seems to be useful endocrine marker to estimate ovarian reserve capacity.
The aim of this study was to summarize the physiological functions of AMH and its
correlation with ovarian reserve capacity and age.
2023-02-01T00:00:00ZA laparoszkópos és transzcervikális termékenyítés alkalmazásának lehetőségei a juhtenyésztésben
http://hdl.handle.net/10832/3287
A laparoszkópos és transzcervikális termékenyítés alkalmazásának lehetőségei a juhtenyésztésben
Bagi, Melinda; Cseh, Sándor; Pálfyné Vass, Nóra
The application of assisted reproductive technologies play an important role
in sheep breeding. The genetical progress, selection and preservation can be
provided by these methods quickly and more effectively. The ewes should be
synchronized by intravaginal devices containing progesterone-like hormone
before the artificial insemination. The insemination can be vaginal, deep cervical,
transcervical and laparoscopic, depending on the deposition of the sperm. The
laparoscopic technique is a minimal invasive method in which two one cm wide
skin incisions are needed where the trocars pierce through the abdominal wall
and we can inject the sperm into the uterus. This technique is used worldwide in
sheep breeding with good efficiency (40-80% pregnancy rate, depending on the
protocol, season, breed, age) so this is the most successful way for inseminating
with frozen sperm but it needs expensive equipment and high level of knowledge
and the ewes need to be sedated before the procedure. The frozen sperm can
be used by transcervical technique as well where the insemination catheter
is going through the cervix and the sperm is injected into the uterine cavity.
This method is not widely spread and used in farm conditions because of the
anatomy of the sheep cervix, which is narrow, closed and it is hard to penetrate it
with a catheter. The successful use of the transcervical method depends also on
the protocol, breed, age, number of lambings and the anatomy of the external
os. Because of the limits of this technique, it is not widely used in the practice,
although it has a lot of benefits, and due to animal health and welfare aspects
(no need for sedation and starvation, no postoperative complications, no need
for antibiotic), developing of the transcervical technique is a good possibility for
research in sheep reproduction.
2023-02-01T00:00:00ZPerspektívák a csirkeantitestek immunoassay-ben történő használatához a mikotoxinexpozíciós szintek kimutatására Irodalmi összefoglaló
http://hdl.handle.net/10832/3286
Perspektívák a csirkeantitestek immunoassay-ben történő használatához a mikotoxinexpozíciós szintek kimutatására Irodalmi összefoglaló
Molnár, Zsófia; Tóth, Arnold; Bodó, Kornélia; Török, Tímea; Babarczi, Bianka; Bodrogi, Lilla; Török, Alexandra; Nagyéri, György; Szőke, Zsuzsanna
The exposure of animal or even human populations in contact with natural and/ or anthropogenic impacts is becoming more and more frequent and significant. These environmentally harmful substances, such as mycotoxins, are able to accumulate in living organisms and then trigger a number of physiological and/ or behavioral effects. Because of their structure, mycotoxins even get into the nucleus, where they modificate different molecular pathways, also causing significant economic damage in the case of wildlife or domestic animals. The mycotoxin zearalenone (ZEA), today’s relevant estrogen-like, endocrine disrupting agent, can be deposited by consuming contaminated cereals and
feed. Similar to the identification of exposure sources, the detection and measurement of the accumulation of ZEA (and other similar mycotoxin agents) as soon as possible is (would be) in our common interest. One possibility of
measurement is an immunoassay that specifically recognizes the agent, and the use of immunoglobulins as binding agents in the assay. However, the development of binding agents (especially mammalian, monoclonal antibodies) can be an expensive, long-lasting and complex process. As an alternative solution, polyclonal poultry antibody (IgY), which can be easily, cheaply and quickly produced from eggs, is increasingly used for the above purpose. The study primarily collects IgY and immunoassay developments applicable to mycotoxin measurement; highlighting the related possibilities of ZEA detection, which is in the focus of our group. IgY is an effective perspective, but at the same time, it can also present developers with many challenges, of which the most important are also demonstrated by the authors through the example of ZEA.
2023-02-01T00:00:00ZAngol telivér versenylovak csüdízületének kórképei 2. rész: Az ízület és a csontos képletek elváltozásai
http://hdl.handle.net/10832/3285
Angol telivér versenylovak csüdízületének kórképei 2. rész: Az ízület és a csontos képletek elváltozásai
Boros, Koppány; Nagy, Annamária
The metacarpo- and metatarsophalangeal joints of Thoroughbred racehorses are affected by a range of diseases of different etiopathogeneses. Bone maladaptation and special biomechanical factors contribute to the development of most abnormalities, as described in Part 1 of this series. In the current paper, the authors present a literature review of the most common bone and joint disorders affecting the fetlock joint of Thoroughbred racehorses, illustrated with radiographic, computed tomographic (CT) and magnetic resonance (MR) images.
Where appropriate, diagnosis and management are also discussed. All athletes, human or equine, are susceptible to orthopaedic injuries during
training and competition. High-speed work during gallop makes racehorses susceptible to musculoskeletal conditions that are rarely seen in horses training and competing in other disciplines. Pathology involving the fetlock region is a leading cause of lameness and wastage in the Thoroughbred industry and, in some cases, it may also necessitate destruction of the horse on humane grounds. Due to the economic and animal welfare implications of fetlock injuries, an increasing emphasis is placed on prevention. This is best achieved by close monitoring of equine athletes, including regular clinical examination, gait assessment and, if appropriate, diagnostic imaging. Indeed, the increasing accessibility of three-dimensional diagnostic imaging methods (CT and MR imaging) enables early detection of fetlock joint abnormalities, thus helping to prevent their progression to serious or catastrophic injuries.
2023-02-01T00:00:00Z