Harderian Gland n-acetyltransferase activity in the male syrian hamster: Effects of gonadectomy, short photoperiod exposure, or subcutaneous melatonin implants

Arando Menendez-Pelaez; Russel J. Reiter; Kimberly A. Howes; Manuel Puig-Domingo; Mary K. Vaughan; Maureen E. Troiani; John C. Little

doi:10.3109/07435808809032981

Harderian Gland n-acetyltransferase activity in the male syrian hamster: Effects of gonadectomy, short photoperiod exposure, or subcutaneous melatonin implants

Arando Menendez-Pelaez, Russel J. Reiter, Kimberly A. Howes, Manuel Puig-Domingo, Mary K. Vaughan, Maureen E. Troiani, John C. Little

Department of Cell Systems & Anatomy

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The activities of NAT and HIOMT and the melatonin concentration in the Harderian glands of intact, gonadectomized, and gonadally-regressed male Syrian hamsters were studied. To produce gonadal regression, hamsters were exposed to either artificial or naturally short photoperiods. NAT activity of castrated and gonadally-regressed hamsters was always less in comparison to that of animals with intact gonads. Castrated hamsters exposed to long days showed higher NAT activity than that of castrated animals exposed to short photoperiods indicating that light may have some influence on Harderian NAT independent of the gonadal status. Also, gonadally-regressed hamsters exposed to long photoperiods exhibited higher NAT activity in comparison to gonadally-regressed animals exposed to short days. The HIOMT activity and melatonin content of Harderian glands in all these groups of male Syrian hamster were very low.

Original language	English (US)
Pages (from-to)	121-130
Number of pages	10
Journal	Endocrine Research
Volume	14
Issue number	2-3
DOIs	https://doi.org/10.3109/07435808809032981
State	Published - 1988

Keywords

Harderian gland
Hydroxyindole-O-methyltransferase
Male Syrian hamster
Melatonin
N-acetyltransferase

ASJC Scopus subject areas

Endocrinology

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10.3109/07435808809032981

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title = "Harderian Gland n-acetyltransferase activity in the male syrian hamster: Effects of gonadectomy, short photoperiod exposure, or subcutaneous melatonin implants",

abstract = "The activities of NAT and HIOMT and the melatonin concentration in the Harderian glands of intact, gonadectomized, and gonadally-regressed male Syrian hamsters were studied. To produce gonadal regression, hamsters were exposed to either artificial or naturally short photoperiods. NAT activity of castrated and gonadally-regressed hamsters was always less in comparison to that of animals with intact gonads. Castrated hamsters exposed to long days showed higher NAT activity than that of castrated animals exposed to short photoperiods indicating that light may have some influence on Harderian NAT independent of the gonadal status. Also, gonadally-regressed hamsters exposed to long photoperiods exhibited higher NAT activity in comparison to gonadally-regressed animals exposed to short days. The HIOMT activity and melatonin content of Harderian glands in all these groups of male Syrian hamster were very low.",

keywords = "Harderian gland, Hydroxyindole-O-methyltransferase, Male Syrian hamster, Melatonin, N-acetyltransferase",

author = "Arando Menendez-Pelaez and Reiter, {Russel J.} and Howes, {Kimberly A.} and Manuel Puig-Domingo and Vaughan, {Mary K.} and Troiani, {Maureen E.} and Little, {John C.}",

note = "Funding Information: This study was supported by NSF grant no. PCM 8410592 and the",

year = "1988",

doi = "10.3109/07435808809032981",

language = "English (US)",

volume = "14",

pages = "121--130",

journal = "Endocrine Research",

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T1 - Harderian Gland n-acetyltransferase activity in the male syrian hamster

T2 - Effects of gonadectomy, short photoperiod exposure, or subcutaneous melatonin implants

AU - Menendez-Pelaez, Arando

AU - Reiter, Russel J.

AU - Howes, Kimberly A.

AU - Puig-Domingo, Manuel

AU - Vaughan, Mary K.

AU - Troiani, Maureen E.

AU - Little, John C.

N1 - Funding Information: This study was supported by NSF grant no. PCM 8410592 and the

PY - 1988

Y1 - 1988

N2 - The activities of NAT and HIOMT and the melatonin concentration in the Harderian glands of intact, gonadectomized, and gonadally-regressed male Syrian hamsters were studied. To produce gonadal regression, hamsters were exposed to either artificial or naturally short photoperiods. NAT activity of castrated and gonadally-regressed hamsters was always less in comparison to that of animals with intact gonads. Castrated hamsters exposed to long days showed higher NAT activity than that of castrated animals exposed to short photoperiods indicating that light may have some influence on Harderian NAT independent of the gonadal status. Also, gonadally-regressed hamsters exposed to long photoperiods exhibited higher NAT activity in comparison to gonadally-regressed animals exposed to short days. The HIOMT activity and melatonin content of Harderian glands in all these groups of male Syrian hamster were very low.

AB - The activities of NAT and HIOMT and the melatonin concentration in the Harderian glands of intact, gonadectomized, and gonadally-regressed male Syrian hamsters were studied. To produce gonadal regression, hamsters were exposed to either artificial or naturally short photoperiods. NAT activity of castrated and gonadally-regressed hamsters was always less in comparison to that of animals with intact gonads. Castrated hamsters exposed to long days showed higher NAT activity than that of castrated animals exposed to short photoperiods indicating that light may have some influence on Harderian NAT independent of the gonadal status. Also, gonadally-regressed hamsters exposed to long photoperiods exhibited higher NAT activity in comparison to gonadally-regressed animals exposed to short days. The HIOMT activity and melatonin content of Harderian glands in all these groups of male Syrian hamster were very low.

KW - Harderian gland

KW - Hydroxyindole-O-methyltransferase

KW - Male Syrian hamster

KW - Melatonin

KW - N-acetyltransferase

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Harderian Gland n-acetyltransferase activity in the male syrian hamster: Effects of gonadectomy, short photoperiod exposure, or subcutaneous melatonin implants

Abstract

Keywords

ASJC Scopus subject areas

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