Abstract
The common spiny mouse (Acomys cahirinus) is the only known rodent to demonstrate a myriad of physiological processes unseen in their murid relatives. The most recently discovered of these uncharacteristic traits: spontaneous decidual transformation of the uterus in virgin females, preceding menstruation. Menstruation occurring without experimental intervention in rodents has not been documented elsewhere to date, and natural menstruation is indeed rare in the animal kingdom outside of higher order primates. This review briefly summarises the current knowledge of spiny mouse biology and taxonomy, and explores their endocrinology which may aid in our understanding of the evolution of menstruation in this species. We propose that DHEA, synthesised by the spiny mouse (but not other rodents), humans and other menstruating primates, is integral in spontaneous decidualisation and therefore menstruation. We discuss both physiological and behavioural attributes across the menstrual cycle in the spiny mouse analogous to those observed in other menstruating species, including premenstrual syndrome. We further encourage the use of the spiny mouse as a small animal model of menstruation and female reproductive biology.

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References
Bellofiore N, et al. First evidence of a menstruating rodent: the spiny mouse (Acomys cahirinus). Am J Obstet Gynecol. 2017;216(1):40. e1–40. e11.
Hamlett G. Uterine bleeding in a bat, Glossophaga soricina. Anat Rec. 1934;60(1):9–17.
Rasweiler JJ. Spontaneous decidual reactions and menstruation in the black mastiff bat, Molossus ater. Am J Anat. 1991;191:1–22.
Rasweiler JJ, De Bonilla H. Menstruation in short-tailed fruit bats (Carollia spp.). J Reprod Fertil. 1992;95(1):231–48.
Zhang X, Zhu C, Lin H, Yang Q, Ou Q, Li Y, et al. Wild fulvous fruit bats (Rousettus leschenaulti) exhibit human-like menstrual cycle. Biol Reprod. 2007;77(2):358–64.
Van der Horst C, Gillman J. The menstrual cycle in Elephantulus. S Afr J Med Sci. 1941;6:27–42.
Downey B. Regulation of the estrous cycle in domestic animals—a review. Can Vet J. 1980;21(11):301–6.
Modi DN, et al. Endometrial biology during trophoblast invasion. Front Biosci (Schol Ed). 2012;4(3):1151–71.
Emera D, Romero R, Wagner G. The evolution of menstruation: a new model for genetic assimilation. Bioessays. 2012;34(1):26–35.
Bellofiore N, Cousins F, Temple-Smith P, Dickinson H, Evans J. A missing piece: the spiny mouse and the puzzle of menstruating species. J Mol Endocrinol. 2018;61(1):R25–41.
Clarke J. The adaptive significance of menstruation: the meaning of menstruation in the elimination of abnormal embryos. Hum Reprod. 1994;9(7):1204–7.
Salker M, Teklenburg G, Molokhia M, Lavery S, Trew G, Aojanepong T, et al. Natural selection of human embryos: impaired decidualization of endometrium disables embryo-maternal interactions and causes recurrent pregnancy loss. PLoS One. 2010;5(4):e10287.
Teklenburg G, Salker M, Molokhia M, Lavery S, Trew G, Aojanepong T, et al. Natural selection of human embryos: decidualizing endometrial stromal cells serve as sensors of embryo quality upon implantation. PLoS One. 2010;5(4):e10258.
Lynch VJ, Nnamani MC, Kapusta A, Brayer K, Plaza SL, Mazur EC, et al. Ancient transposable elements transformed the uterine regulatory landscape and transcriptome during the evolution of mammalian pregnancy. Cell Rep. 2015;10(4):551–61.
Dye L, Blundell J. Menstrual cycle and appetite control: implications for weight regulation. Hum Reprod. 1997;12(6):1142–51.
Strassmann BI. The evolution of endometrial cycles and menstruation. Q Rev Biol. 1996;71(2):181–220.
Oosterhuis W, et al. Perinatal development of the lung in rat and spiny mouse: its relation to altricial and precocial timing of birth. Neonatology. 1984;45(5):236–43.
Dickinson H, Walker DW, Cullen-McEwen L, Wintour EM, Moritz K. The spiny mouse (Acomys cahirinus) completes nephrogenesis before birth. Am J Physiol-Renal Physiol. 2005;289(2):F273–9.
Ellery SJ, LaRosa DA, Kett MM, Della Gatta PA, Snow RJ, Walker DW, et al. Dietary creatine supplementation during pregnancy: a study on the effects of creatine supplementation on creatine homeostasis and renal excretory function in spiny mice. Amino Acids. 2016;48(8):1819–30.
Ireland Z, Castillo-Melendez M, Dickinson H, Snow R, Walker DW. A maternal diet supplemented with creatine from mid-pregnancy protects the newborn spiny mouse brain from birth hypoxia. Neuroscience. 2011;194:372–9.
Ireland Z, et al. Maternal creatine: does it reach the fetus and improve survival after an acute hypoxic episode in the spiny mouse (Acomys cahirinus)? Am J Obstet Gynecol. 2008;198(4):431. e1–6.
Gonet AE, Stauffacher W, Pictet R, Renold AE. Obesity and diabetes mellitus with striking congenital hyperplasia of the islets of Langerhans in spiny mice (Acomys cahirinus). Diabetologia. 1966;1(3–4):162–71.
Lamers WH, Mooren PG, Griep H, Endert E, Degenhart HJ, Charles R. Hormones in perinatal rat and spiny mouse: relation to altricial and precocial timing of birth. Am J Physiol Endocrinol Metab. 1986;251(1):E78–85.
Quinn TA, Ratnayake U, Dickinson H, Nguyen TH, McIntosh M, Castillo-Melendez M, et al. Ontogeny of the adrenal gland in the spiny mouse, with particular reference to production of the steroids cortisol and dehydroepiandrosterone. Endocrinology. 2013;154(3):1190–201.
Seifert AW, Kiama SG, Seifert MG, Goheen JR, Palmer TM, Maden M. Skin shedding and tissue regeneration in African spiny mice (Acomys). Nature. 2012;489(7417):561–5.
Bellofiore N, Rana S, Dickinson H, Temple-Smith P, Evans J. Characterization of human-like menstruation in the spiny mouse: comparative studies with the human and induced mouse model. Hum Reprod. 2018;33(9):1715–26.
Sarich VM Rodent macromolecular systematics. In Evolutionary relationships among rodents. Boston, MA: Springer; 1985. p. 423-452.
Agulnik SI, Silver LM. The Cairo spiny mouse Acomys cahirinus shows a strong affinity to the Mongolian gerbil Meriones unguiculatus. Mol Biol Evol. 1996;13(1):3–6.
Michaux J, Reyes A, Catzeflis F. Evolutionary history of the most speciose mammals: molecular phylogeny of muroid rodents. Mol Biol Evol. 2001;18(11):2017–31.
Hänni C, et al. Evolutionary relationships of Acomys and other murids (Rodentia, Mammalia) based on complete 12S rRNA mitochondrial gene sequences. Isr J Zool. 1995;41(2):131–46.
Peitz B. The oestrous cycle of the spiny mouse (Acomys cahirinus). J Reprod Fertil. 1981;61:453–9.
Haughton CL, Gawriluk TR, Seifert AW. The biology and husbandry of the African spiny mouse (Acomys cahirinus) and the research uses of a laboratory colony. J Am Assoc Lab Anim Sci. 2016;55(1):9–17.
Dickinson H, Walker D. Managing a colony of spiny mice (Acomys cahirinus) for perinatal research. Australian and New Zealand Council for the Care of Animals in Research and Training (ANZCCART) News. 2007;20(1):4–11.
Abbott D, Bird I. Nonhuman Primates as models for human adrenal androgen production: function and dysfunction. Rev Endocr Metab Disord. 2009;10(1):33–42.
Kimonides V, et al. Dehydroepiandrosterone (DHEA) and DHEA-sulfate (DHEAS) protect hippocampal neurons against excitatory amino acid-induced neurotoxicity. Proc Natl Acad Sci. 1998;95(4):1852–7.
Cardounel A, Regelson W, Kalimi M. Dehydroepiandrosterone protects hippocampal neurons against neurotoxin-induced cell death: mechanism of action (44437). Proc Soc Exp Biol Med. 1999;222(2):145–9.
Warren JC, Timberlake CE. Biosynthesis of estrogens in pregnancy: precursor role of plasma dehydroisoandrosterone. Obstet Gynecol. 1964;23(5):689–98.
Labrie F, Labrie C. DHEA and intracrinology at menopause, a positive choice for evolution of the human species. Climacteric. 2013;16(2):205–13.
Finch CE. The menopause and aging, a comparative perspective. J Steroid Biochem Mol Biol. 2014;142:132–41.
Gibson DA, et al. Dehydroepiandrosterone enhances decidualization in women of advanced reproductive age. Fertil Steril. 2018;109(4):728–734. e2.
Maggiolini M, Donzé O, Jeannin E, Andò S, Picard D. Adrenal androgens stimulate the proliferation of breast cancer cells as direct activators of estrogen receptor α. Cancer Res. 1999;59(19):4864–9.
Snijders MPML, et al. Immunocytochemical analysis of oestrogen receptors and progesterone receptors in the human uterus throughout the menstrual cycle and after the menopause. J Reprod Fertil. 1992;94(2):363.
Romano GJ, Krust A, Pfaff DW. Expression and estrogen regulation of progesterone receptor mRNA in neurons of the mediobasal hypothalamus: an in situ hybridization study. Mol Endocrinol. 1989;3(8):1295–300.
Kurita T, Lee KJ, Saunders PTK, Cooke PS, Taylor JA, Lubahn DB, et al. Regulation of progesterone receptors and decidualization in uterine stroma of the estrogen receptor-α knockout mouse1. Biol Reprod. 2001;64(1):272–83.
Mills SJ, Ashworth JJ, Gilliver SC, Hardman MJ, Ashcroft GS. The sex steroid precursor DHEA accelerates cutaneous wound healing via the estrogen receptors. J Investig Dermatol. 2005;125(5):1053–62.
Evans J, Salamonsen LA, Winship A, Menkhorst E, Nie G, Gargett CE, et al. Fertile ground: human endometrial programming and lessons in health and disease. Nat Rev Endocrinol. 2016;12(11):654–67.
Garry R, Hart R, Karthigasu KA, Burke C. Structural changes in endometrial basal glands during menstruation. BJOG Int J Obstet Gynaecol. 2010;117(10):1175–85.
Salamonsen LA. Tissue injury and repair in the female human reproductive tract. Reproduction. 2003;125:301–11.
Cutler Jr GB, Glenn M, Bush RM, Hodgen GD, Graham CE, Loriaux DL. Adrenarche: a survey of rodents, domestic animals, and primates. 1978.
Conley AJ, Pattison JC, Bird IM, (editors). Variations in adrenal androgen production among (nonhuman) primates. Seminars in reproductive medicine. 2004. Copyright© 2004 by Thieme Medical Publishers, Inc., New York.
Pattison JC. Marmoset 17 [alpha]-hydoxylase/17, 20-lyase cytochrome P450: relationship between enzyme structure and function to low circulating DHEA levels observed in vivo. Madison: University of Wisconsin; 2008.
Bellofiore N, Cousins F, Temple-Smith P, Evans J. Altered exploratory behaviour and increased food intake in the spiny mouse before menstruation: a unique pre-clinical model for examining premenstrual syndrome. Hum Reprod. 2018 (In Press). https://doi.org/10.1093/humrep/dey360.
Yonkers KA, O’Brien PS, Eriksson E. Premenstrual syndrome. Lancet. 2008;371(9619):1200–10.
Gillings MR. Were there evolutionary advantages to premenstrual syndrome? Evol Appl. 2014;7(8):897–904.
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The authors would like to acknowledge the critical insight into this manuscript and continued intellectual support provided by Associate Professor Peter Temple-Smith.
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Bellofiore, N., Evans, J. Monkeys, mice and menses: the bloody anomaly of the spiny mouse. J Assist Reprod Genet 36, 811–817 (2019). https://doi.org/10.1007/s10815-018-1390-3
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DOI: https://doi.org/10.1007/s10815-018-1390-3