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The Effect of Feeding Mixed Tocopherol Oil on Body Accumulation and Immune Cell Functions in Lactating Holstein Dairy Cows.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	The Effect of Feeding Mixed Tocopherol Oil on Body Accumulation and Immune Cell Functions in Lactating Holstein Dairy Cows./
作者:	Qu, Yang.
面頁冊數:	1 online resource (159 pages)
附註:	Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
Contained By:	Dissertation Abstracts International79-02B(E).
標題:	Animal sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9780355292404

The Effect of Feeding Mixed Tocopherol Oil on Body Accumulation and Immune Cell Functions in Lactating Holstein Dairy Cows.
Qu, Yang.

The Effect of Feeding Mixed Tocopherol Oil on Body Accumulation and Immune Cell Functions in Lactating Holstein Dairy Cows. - 1 online resource (159 pages)

Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.

Thesis (Ph.D.)--University of Maryland, College Park, 2017.

Includes bibliographical references

Non-alpha-tocopherol (i.e. beta, gamma, and delta-tocopherol) supplements are as important as alpha-tocopherol with regard to maintaining lactating dairy cow health. However, information on non-alpha-tocopherol bioaccumulation and its effects on immune cell function is not available. A series of experiments were conducted to investigate the effect of mixed tocopherol oil supplement (Tmix; i.e. alpha, beta, gamma, and delta-tocopherol) on body accumulation and immune cell functions of the lactating Holstein dairy cow. Tissue, tissue mitochondria, blood and milk were collected from lactating dairy cows to measure the concentration of all four tocopherol isoforms via Tmix supplementation. In addition, polymorphonuclear leukocyte (PMN) were isolated to investigate the effect of Tmix on its function and immune gene expression. In the first experiment, Tmix increased gamma-tocopherol concentrations but did not increase the alpha-tocopherol concentration in three different types of tissues (i.e. liver, mammary gland and muscle) and liver mitochondria. Within those three different types of tissues, liver showed the highest ability to store tocopherol isoforms (i.e. alpha- and gamma-tocopherol) compared to the other two tissues. Also, amounts of alpha- and gamma-tocopherol were detected in liver mitochondria, but limited amounts were detected in mammary gland mitochondria. In the following experiment, Tmix increased gamma-tocopherol concentration in milk and blood as determined via every 8 h and daily measurements. Compared to gamma-tocopherol, alpha-tocopherol showed the highest concentration of the tocopherol isoforms in milk and blood. Limited quantities of beta- and delta-tocopherol were detected in milk and blood via Tmix supplementation. In the last experiment, Tmix increased PMN chemotaxis function and did not impair the whole blood respiratory burst response of dairy cows, which might be associated with non-alpha-tocopherol existing in Tmix. Even though Tmix increased the expression of pro-inflammatory genes in PMN, those are needed during the initial immune activation. Overall, the results of the experiments demonstrated that short-term supplementation with Tmix could compensate gamma-tocopherol without altering alpha-tocopherol in dairy cows. The liver showed the highest capability of accumulating tocopherol isoforms compared to the mammary gland and muscle. In addition, Tmix did not harm immune functions or have any apparent effects on animal health in lactating Holstein dairy cows.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355292404Subjects--Topical Terms:

1178863
Animal sciences.
Index Terms--Genre/Form:

554714
Electronic books.

The Effect of Feeding Mixed Tocopherol Oil on Body Accumulation and Immune Cell Functions in Lactating Holstein Dairy Cows.
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500 $a Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
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502 $a Thesis (Ph.D.)--University of Maryland, College Park, 2017.
504 $a Includes bibliographical references
520 $a Non-alpha-tocopherol (i.e. beta, gamma, and delta-tocopherol) supplements are as important as alpha-tocopherol with regard to maintaining lactating dairy cow health. However, information on non-alpha-tocopherol bioaccumulation and its effects on immune cell function is not available. A series of experiments were conducted to investigate the effect of mixed tocopherol oil supplement (Tmix; i.e. alpha, beta, gamma, and delta-tocopherol) on body accumulation and immune cell functions of the lactating Holstein dairy cow. Tissue, tissue mitochondria, blood and milk were collected from lactating dairy cows to measure the concentration of all four tocopherol isoforms via Tmix supplementation. In addition, polymorphonuclear leukocyte (PMN) were isolated to investigate the effect of Tmix on its function and immune gene expression. In the first experiment, Tmix increased gamma-tocopherol concentrations but did not increase the alpha-tocopherol concentration in three different types of tissues (i.e. liver, mammary gland and muscle) and liver mitochondria. Within those three different types of tissues, liver showed the highest ability to store tocopherol isoforms (i.e. alpha- and gamma-tocopherol) compared to the other two tissues. Also, amounts of alpha- and gamma-tocopherol were detected in liver mitochondria, but limited amounts were detected in mammary gland mitochondria. In the following experiment, Tmix increased gamma-tocopherol concentration in milk and blood as determined via every 8 h and daily measurements. Compared to gamma-tocopherol, alpha-tocopherol showed the highest concentration of the tocopherol isoforms in milk and blood. Limited quantities of beta- and delta-tocopherol were detected in milk and blood via Tmix supplementation. In the last experiment, Tmix increased PMN chemotaxis function and did not impair the whole blood respiratory burst response of dairy cows, which might be associated with non-alpha-tocopherol existing in Tmix. Even though Tmix increased the expression of pro-inflammatory genes in PMN, those are needed during the initial immune activation. Overall, the results of the experiments demonstrated that short-term supplementation with Tmix could compensate gamma-tocopherol without altering alpha-tocopherol in dairy cows. The liver showed the highest capability of accumulating tocopherol isoforms compared to the mammary gland and muscle. In addition, Tmix did not harm immune functions or have any apparent effects on animal health in lactating Holstein dairy cows.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Animal sciences. $3 1178863
650 4 $a Agriculture. $3 660421
655 7 $a Electronic books. $2 local $3 554714
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