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Failure to respond to endogenous or exogenous melatonin may cause nonphotoresponsiveness in Harlan Sprague Dawley rats.

Price MR, Kruse JA, Galvez ME, Lorincz AM, Avigdor M, Heideman PD.

J Circadian Rhythms. 2005 Sep 14;3:12.PMID: 16162292 [PubMed]Related articlesFree article

Photoresponsive Fischer 344 Rats are reproductively inhibited by melatonin and differ in 2-[125I] lodomelatonin binding from nonphotoresponsive Sprague-Dawley rats.

Heideman PD, Bierl CK, Sylvester CJ.

J Neuroendocrinol. 2001 Mar;13(3):223-32.PMID: 11207936 [PubMed - indexed for MEDLINE]Related articles

Variation in nocturnality and circadian activity rhythms between photoresponsive F344 and nonphotoresponsive Sprague Dawley rats.

Seroka CD, Johnson CE, Heideman PD.

J Circadian Rhythms. 2008 Sep 9;6:8.PMID: 18782448 [PubMed - in process]Related articlesFree article

Urinary 6-sulfatoxymelatonin profiles in male Djungarian hamsters (Phodopus sungorus) responding and not responding to short-day photoperiods: possible role of elevated daytime levels.

Niehaus M, Lerchl A.

J Pineal Res. 1998 Oct;25(3):167-71.PMID: 9745985 [PubMed - indexed for MEDLINE]Related articles

Seasonal variation in serum concentrations of reproductive hormones and urinary excretion of 6-sulfatoxymelatonin in men living north and south of the Arctic Circle: a longitudinal study.

Ruhayel Y, Malm G, Haugen TB, Henrichsen T, Bjørsvik C, Grotmol T, Saether T, Malm J, Figenschau Y, Rylander L, Levine RJ, Giwercman A.

Clin Endocrinol (Oxf). 2007 Jul;67(1):85-92. Epub 2007 Jun 4.PMID: 17547693 [PubMed - indexed for MEDLINE]Related articles

Short photoperiod inhibition of growth in body mass and reproduction in ACI, BUF, and PVG inbred rats.

Francisco NR, Raymond CM, Heideman PD.

Reproduction. 2004 Dec;128(6):857-62.PMID: 15579603 [PubMed - indexed for MEDLINE]Related articlesFree article

Urinary 6-sulphatoxymelatonin excretory rhythms in laboratory rats: effects of photoperiod and light.

Kennaway DJ.

Brain Res. 1993 Feb 19;603(2):338-42.PMID: 8461986 [PubMed - indexed for MEDLINE]Related articles

Inhibition of reproductive maturation and somatic growth of Fischer 344 rats by photoperiods shorter than L14:D10 and by gradually decreasing photoperiod.

Heideman PD, Bierl CK, Galvez ME.

Biol Reprod. 2000 Nov;63(5):1525-30.PMID: 11058561 [PubMed - indexed for MEDLINE]Related articlesFree article

Reproductive photoresponsiveness in unmanipulated male Fischer 344 laboratory rats.

Heideman PD, Sylvester CJ.

Biol Reprod. 1997 Jul;57(1):134-8.PMID: 9209091 [PubMed - indexed for MEDLINE]Related articlesFree article

Melatonin and seasonal rhythms.

Wehr TA.

J Biol Rhythms. 1997 Dec;12(6):518-27. Review.PMID: 9406025 [PubMed - indexed for MEDLINE]Related articles

Urinary melatonin: a noninvasive method to follow human pineal function as studied in three experimental conditions.

Pääkkönen T, Mäkinen TM, Leppäluoto J, Vakkuri O, Rintamäki H, Palinkas LA, Hassi J.

J Pineal Res. 2006 Mar;40(2):110-5.PMID: 16441547 [PubMed - indexed for MEDLINE]Related articles

Nocturnal patterns and up-regulated excretion of the melatonin metabolite 6-sulfatoxymelatonin in the diurnal rodent Psammomys obesus post-weaning under a short photoperiod.

Neuman A, Gothilf Y, Haim A, Ben-Aharon G, Zisapel N.

Comp Biochem Physiol A Mol Integr Physiol. 2005 Nov;142(3):297-307. Epub 2005 Sep 19.PMID: 16172010 [PubMed - indexed for MEDLINE]Related articles

Endogenous circannual cycles of ovarian activity and changes in prolactin and melatonin secretion in wild and domestic female sheep maintained under a long-day photoperiod.

Gómez-Brunet A, Santiago-Moreno J, del Campo A, Malpaux B, Chemineau P, Tortonese DJ, Gonzalez-Bulnes A, López-Sebastián A.

Biol Reprod. 2008 Mar;78(3):552-62. Epub 2007 Nov 21.PMID: 18032418 [PubMed - indexed for MEDLINE]Related articlesFree article

We are in the dark here: induction of depression- and anxiety-like behaviours in the diurnal fat sand rat, by short daylight or melatonin injections.

Ashkenazy T, Einat H, Kronfeld-Schor N.

Int J Neuropsychopharmacol. 2009 Feb;12(1):83-93. Epub 2008 Jul 17.PMID: 18631427 [PubMed - indexed for MEDLINE]Related articles

Redefining the limits of day length responsiveness in a seasonal mammal.

Wagner GC, Johnston JD, Clarke IJ, Lincoln GA, Hazlerigg DG.

Endocrinology. 2008 Jan;149(1):32-9. Epub 2007 Sep 27.PMID: 17901234 [PubMed - indexed for MEDLINE]Related articlesFree article

Melatonin production in healthy infants: evidence for seasonal variations.

Sivan Y, Laudon M, Tauman R, Zisapel N.

Pediatr Res. 2001 Jan;49(1):63-8.PMID: 11134493 [PubMed - indexed for MEDLINE]Related articles

Melatonin production is similar in children with monosymptomatic nocturnal enuresis or other forms of enuresis/incontinence and in controls.

Kirchlechner V, Hoffmann-Ehrhart B, Kovacs J, Waldhauser F.

J Urol. 2001 Dec;166(6):2407-10.PMID: 11696799 [PubMed - indexed for MEDLINE]Related articles

Multiple melatonin target tissues mediate termination of photorefractoriness by long day lengths in Siberian hamsters.

Teubner BJ, Smith CD, Freeman DA.

J Biol Rhythms. 2008 Dec;23(6):502-10.PMID: 19060259 [PubMed - indexed for MEDLINE]Related articles

Reduced body mass, food intake, and testis size in response to short photoperiod in adult F344 rats.

Shoemaker MB, Heideman PD.

BMC Physiol. 2002 Jul 22;2:11.PMID: 12135532 [PubMed - indexed for MEDLINE]Related articlesFree article

Effect of constant-release melatonin implants and prolonged exposure to a long day photoperiod on prolactin secretion and hair growth in mouflon (Ovis gmelini musimon).

Santiago-Moreno J, López-Sebastián A, del Campo A, González-Bulnes A, Picazo R, Gómez-Brunet A.

Domest Anim Endocrinol. 2004 May;26(4):303-14.PMID: 15063923 [PubMed - indexed for MEDLINE]Related articles