Wyniki wyszukiwania

1

Mechanizm odklejenia łożyska u klaczy

100%

Rapacz-Leonard A., Ras A., Janowski T. E.

Medycyna Weterynaryjna

|

2012

|

tom 68

|

nr 12

Retained placenta is one of the most common peripartum complications in mares. It delays the recovery of the uterus, decreases fertility, and can be life-threatening. The mechanism of normal placenta release is unknown. In addition to systemic hormonal changes affecting the process of placenta separation, it is supposed that local mechanisms at the cellular level may play an important role in this process. It is known that the incidence of retained placenta correlates with reduced expression of classic class I major histocompatibility complex protein (classic MHC I) in cows’ placentas. In mares, classic MHC I is expressed in early pregnancy, but it is unknown if classic MHC I is expressed again in peripartum and if reduced expression correlates with retained placenta in mares. Both early and late expression seem likely, because early expression would prepare mares to reject placenta tissues if MHC is expressed peripartum. This article discusses how MHC I is expressed in placental tissues; how it affects lymphocyte migration, metalloproteinase activation, and extra-cellular matrix remodelling in those tissues; and how various factors can affect MHC I activation. The paper also describes a hypothesis for the mechanism of placenta separation in mares based on the similarity of these processes in other species that have been more extensively studied.

2

Does the major histocompatibility complex influence choice of mate in humans and other mammals? - a review

100%

Jaworska J., Rapacz-Leonard A., Janowski T. E., Jezierski T.

Animal Science Papers and Reports

|

2017

|

tom 35

|

nr 2

Reproduction is one of the basic biological functions in animals and humans. Due to the high biological relevance of reproduction and energy investment in their rearing offspring need to be of the best genetic quality and fitness to ensure preservation of the species. Both males and females employ mating strategies that would promote reproduction success and survival of their offspring. Choosing a high-quality mating partner is considered to be the main strategy in the reproduction process. One of the factors influencing the partner’s attractiveness is Major Histocompatibility Complex class I (MHC I). The influence of MHC I on mate choice is well established in animals, whereas it is still questioned in humans, where the social status of a partner may strongly influence the mate choice. In this review the role of the MHC I on mate choice in animals and humans is discussed. The studies published so far show that all investigated mammalian species can detect fractions of the MHC I molecules in urine and other body fluids. The response to the signal carried by MHC I is context-dependent and varies not only between species, but also between genders and may be modulated by various socioecological factors in every phase of the reproduction process, until zygote formation. These results suggest that MHC plays an important role in the choice of a reproductive partner in all mammal species, including humans.

3

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Biopsja i ocena histopatologiczna endometrium w diagnostyce niepłodności u klaczy

88%

Pazdzior-Czapula K., Otrocka-Domagala I., Gesek M., Mikiewicz M., Rapacz-Leonard A.

Życie Weterynaryjne

|

2016

|

tom 91

|

nr 06

4

Estimation of infection of internal parasites in horses from different type of farms

76%

Sokol R., Ras-Norynska M., Michalczyk M., Ras A., Rapacz-Leonard A., Koziatek S.

Annals of Parasitology

|

2015

|

tom 61

|

nr 3

Studies were carried out in year 2014 during the pasture period (from April to October) in Warmia and Mazury Region. Fecal samples were taken from cold- and warmblood horses from individual and agrotouristic farms with the different housing, feeding and pasture- care practices. Total of 512 horses were examined (320 mares, 170 geldings and 22 stallions). In the group of 185 horses from individual farms, 119 animals (64.3%) were infected with gastro-intestinal parasites. Among the 372 horses from agrotouristic farms 169 (51.7%) were infected with parasites. Most of the animals expelled the eggs of Cyathostominae. In some individuals occurred eggs of Strongylus spp., Parascaris equorum, Strongyloides westeri and tapeworm of Anoplocephala. The number of infected horses from agrotouristic farms was lower than from individual farms, probably due to more regular deworming (usually 2 times a year) and bigger care paid to cleaning pastures.

Ograniczanie wyników

1 Animal Science Papers and Reports

1 Annals of Parasitology

1 Medycyna Weterynaryjna

1 Życie Weterynaryjne

4 Rapacz-Leonard A.

2 Janowski T. E.

2 Ras A.

1 Gesek M.

1 Jaworska J.

1 Jezierski T.

1 Koziatek S.

1 Michalczyk M.

1 Mikiewicz M.

1 Otrocka-Domagala I.

1 Pazdzior-Czapula K.

1 Ras-Norynska M.

1 Sokol R.

1 2017

1 2016

1 2015

1 2012

Mechanizm odklejenia łożyska u klaczy

Does the major histocompatibility complex influence choice of mate in humans and other mammals? - a review

Biopsja i ocena histopatologiczna endometrium w diagnostyce niepłodności u klaczy

Estimation of infection of internal parasites in horses from different type of farms