Wyniki wyszukiwania

1

Leptyna - polimorfizm genetyczny i rola w rozrodzie

100%

Madeja Z., Piasecka A., Lechniak D., Switonski M.

Medycyna Weterynaryjna

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2002

|

tom 58

|

nr 08

2

Leptyna w procesach metabolizmu i rozrodu

100%

Bogacki M., Kotwica J.

Medycyna Weterynaryjna

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2002

|

tom 58

|

nr 09

3

Leptyna - struktura, wlasciwosci i rola biologiczna

88%

Kostro K., Glinski Z., Miazga A., Krakowski M., Pliszczynski M.

Annales Universitatis Mariae Curie-Skłodowska. Sectio DD:Medicina Veterinaria

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2003

|

tom 58

179-187

4

Znaczenie leptyny w prawidlowym funkcjonowaniu organizmu koni

88%

Keszka A., Borowiec-Chlopek Z.

Przegląd Hodowlany

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2005

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tom 73

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nr 06

11-13

5

Wpływ dodatku leptyny na dojrzewanie oocytów bydła in vitro w warunkach stresu cieplnego

75%

Wozna M., Jaskowski J. M., Jackowska M., Ludwiczak A., Szczepanska P.

Życie Weterynaryjne

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2010

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tom 85

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nr 02

6

Interakcje pomiędzy adipokinami a osią podwzgórzowo-przysadkowo-nadnerczową na przykładzie leptyny, rezystyny oraz adiponektyny

75%

Celichowski P., Jopek K., Trejter M., Hochol A.

Postępy Biologii Komórki

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2014

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tom 41

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nr 3

7

Leptyna - hormon o wielu funkcjach.

75%

Nogalska A., Swierczynski J.

Postępy Biochemii

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2001

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tom 47

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nr 3

200-211

8

Interakcje pomiedzy leptyna i prolaktyna u owiec

75%

Szczesna M., Zieba D. A.

Medycyna Weterynaryjna

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2008

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tom 64

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nr 08

973-976

The capacity of an organism to cope with harsh conditions is the result of long evolutionary processes and interactions between hormones involved in reproduction (LH, FSH, GnRH), metabolic processes (leptin, prolactin, growth hormone) and seasonality (melatonin). The mechanism through which animals adjust energy intake and expenditure according to the demands of the organism in different physiological status is still unknown. In the literature, information about interaction between leptin and prolactin is scarce and contradictory. Leptin plays a crucial role in the regulation of energy homeostasis or food intake and, as well as prolactin, it is a hormone of importance as an endocrine mediator. Day length and lactation are able to affect leptin and prolactin expression and secretion, but also modulate the correlation between them. The present review summarises research on interaction between leptin and prolactin, starting from the direct effects, through the influence of seasonality and lactation. The complete understanding of mechanisms involved in the interactions may be very useful not only in animal breeding, but also in developing effective therapies in human obesity, eating disorders and infertility.

9

Zalezne od fotoperiodu oddzialywanie egzogennej leptyny na poziom uwalniania melatoniny u owiec

75%

Klocek-Gorka B., Wozniak M., Zieba D. A., Murawski M.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

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2007

|

tom 93

363-368

10

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Leptyna - hormon o wielokierunkowym dzialaniu u zwierzat

75%

Zebrowska T.

Postępy Nauk Rolniczych

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2004

|

tom 51

|

nr 1

111-127

Leptin is a hormone of molecular weight of about 16 kDa consisted of 167 amino acids. It is produced mainly by white adipose tissue but its receptors are present also in other tissues and organs. Leptin is recognized as a sensing hormone factor regulating signal responsible for satiety acting as inhibitor of neuropeptide-Y release in hypothalamus generating reduced food intake and thereby a decrease of body weight. Leptin influences the reproductive system and is indispensable in sexual pubescence, its presence is important for proper function of female and male reproductive systems. Concentration of leptin in animal blood is correlated with fat deposition, back fat thickness and intramuscular fat suggesting possibility of its applying as a test of selection in pig, cattle and sheep meat quality evaluation. Leptin is synthesized in mammary gland and its concentration in colostrum and milk depends on the lactation stage. The results of experiments on piglets suggest that the presence of leptin in colostrum and milk influences the development and maturation of digestive tract in suckling piglets.

11

Fizjologiczna oporność na leptynę

75%

Gogga P., Karbowska J., Meissner W., Kochan Z.

Medycyna Weterynaryjna

|

2016

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tom 72

|

nr 10

Leptin is an adipose tissue-derived hormone whose circulating levels correlate with the amount of body fat stores. The main function of this adipokine is to regulate energy metabolism. By modulating the expression of orexigenic and anorexigenic neuropeptides in the hypothalamus, leptin reduces appetite. It also increases energy expenditure, contributing to the decrease of body fat and body weight. Mutations in the leptin receptor gene or prolonged consumption of a high-fat diet may impair leptin action, leading to leptin resistance. Resistance to leptin can also be an adaptive response that occurs in seasonal animals and in pregnant mammals. Reversible insensitivity to the satiety signal of leptin promotes hyperphagia, which is essential for animals living in dynamic environments and experiencing seasonal variation in food availability, since it allows them to forage intensely when food is abundant and accumulate fat reserves necessary to survive periods when food is scarce. Moreover, leptin resistance and subsequent hyperphagia develop during pregnancy in order to meet the energy needs of the growing fetus. Physiological leptin resistance may be due to impaired transport of leptin across the blood-brain barrier and/or to decreased sensitivity of the hypothalamus to this hormone resulting from an inhibition of leptin signalling in hypothalamic neurons. In pregnancy, an increased resistance to leptin action is also mediated by the binding of this adipokine to its placenta-derived soluble receptor. Reduced entry of leptin into the brain as well as alterations in the leptin signalling pathway in the hypothalamus leads to a transient decrease in sensitivity to this hormone preventing appetite suppression.

12

Leptyna i jej rola w regulacji masy ciala.

75%

Szablewski L.

Postępy Biologii Komórki

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1999

|

tom 26

|

nr 2

375-386

13

Geny otylosci

75%

Swirszczynski J., Kochan Z., Karbowska J.

Postępy Biochemii

|

1997

|

tom 43

|

nr 3

174-181

14

Leptyna w siarze i mleku a stymulacja procesu dojrzewania przewodu pokarmowego u nowo narodzonych prosiat

75%

Wolinski J., Biernat M., Zabielski R.

Działalność Naukowa PAN. Wybrane Zagadnienia

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2003

|

tom 16

105-107

15

Wplyw dokomorowych infuzji leptyny na poziom wydzielania GH i PRL u owiec w okresie dnia dlugiego

63%

Wozniak M., Klocek-Gorka B., Molik E.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

|

2007

|

tom 93

675-680

16

Leptyna u ptaków

63%

Wilkanowska A., Mazurowski A.

Hodowca Drobiu

|

2014

|

nr 08

17

Wplyw leptyny na plodnosc ssakow

63%

Wlodarczyk R., Jaskowski J. M.

Życie Weterynaryjne

|

2008

|

tom 83

|

nr 06

474-477

18

Ocena stężeń wybranych adipocytokin i białka c-reaktywnego (CRP) u chorych na astmę oskrzelową

63%

Jasinska A., Kraszula L., Makandjou-Ola E., Kupczyk M., Kuna P., Pietruczuk M.

Diagnostyka Laboratoryjna

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2014

|

tom 50

|

nr 3

19

Rola leptyny siary i mleka w rozwoju przewodu pokarmowego

63%

Zabielski R., Wolinski J.

Folia Universitatis Agriculturae Stetinensis. Zootechnica

|

2001

|

nr 43

15-19

20

Rola leptyny w regulacji metabolizmu, czyli opowiesc o tym, jak tkanka tluszczowa we wspolpracy z mozgiem decyduja za nas czy jesc, czy tez nie

63%

Jakubowska A., Mrozkowiak A.

Wszechświat

|

2001

|

tom 102

|

nr 04-06

98-104

Ograniczanie wyników

Leptyna - polimorfizm genetyczny i rola w rozrodzie

Leptyna w procesach metabolizmu i rozrodu

Leptyna - struktura, wlasciwosci i rola biologiczna

Znaczenie leptyny w prawidlowym funkcjonowaniu organizmu koni

Wpływ dodatku leptyny na dojrzewanie oocytów bydła in vitro w warunkach stresu cieplnego