| [the biology of the volcano mouse (n. a. alstoni). xxi. reproductive capacity of wild females in 15 successive matings]. | this study comprises an investigation on the reproductive capacity of wild females of the volcano mouse (neotomodon alstoni alstoni), in 15 successive matings. the neotomodon were captured in the sierra del volcán ajusco (cerro pelado, parres, d.f.). the animals were kept under environmental laboratory conditions, being fed albi-lab pellets and tap water. the matings were performed from may 1985 to august 1988 by pairs and at random, during 12 days. the females were weighed on the day 1 of the m ... | 1990 | 2222116 |
| [biology of the volcano mouse (n. a. alstone). xvi. comparison of the reproductive capacity of wild females in the laboratory, following 3 mating systems]. | the aim of the present work was the comparison of the reproductive capacity of the wild volcano mouse (neotomodon alstoni alstoni) in the laboratory, using 3 mating systems: pair, harem and collective. the mice were captured in the sierra del volcán ajusco (cerro pelado, parres, d. f.) the animals were kept in plastic cages with sawdust bedding under room conditions of light, humidity and temperature. they were fed with albi-lab pellets and tap water, supplemented with carrots and lettuce. all m ... | 1989 | 2669672 |
| [biology of the volcano mouse (n. a. alstoni). xvii. blood chemistry of animals born in the laboratory (f1)]. | this work reports an initial study of the blood chemistry of young adult (between 129 to 155 days of age), laboratory born (f1) volcano mouse (neotomodon alstoni alstoni). the blood biochemical values determined were glucose, cholesterol, total bilirubin, total protein, albumin and globulin, as well as the electrolytes sodium, potassium, chloride, calcium and phosphorus. in most of the values there were no differences statistically significant between males and females; only the values of total ... | 1989 | 2690767 |
| [studies on the biology of the volcano mouse (neotomodon alstoni). xi. comparative study on the reproduction of wild females in the laboratory mated during 1 and 2 estrous cycles]. | | 1987 | 3310945 |
| [study of the biology of the volcano mouse (neotomodon alstoni alstoni) xii. comparative hematological parameters of wild and laboratory born (f1) animals]. | | 1987 | 3426352 |
| ryanodine receptor binding constants in skeletal muscle, heart, brain and liver of the mexican volcano mouse (neotomodon alstoni alstoni; rodentia:cricetidae). comparison with five other rodent species. | equilibrium [3h]ryanodine binding assay was applied to total membrane fractions of six rodent species, including the mexican volcano mouse neotomodon alstoni alstoni, wistar rat rattus norvegicus albinus, golden hamster mesocritus auratus, gerbil meriones unguiculatus, guinea-pig cavia porcellus, and ground squirrel spermophillus mexicanus. the organs selected for this study were: skeletal muscle, heart, brain and liver. the constants derived from scatchard analysis show slight variations in the ... | 1997 | 9202432 |
| [aggressive behavior of the male volcano mouse neotomodon alstoni (rodentia: cricetidae)]. | a study was carried out on the agonistic behavior of the male volcano mouse, neotomodon alstoni, with 50 pairs of males which were classified as possible dominants (d) and subordinates (s), utilizing melzack-thompson's method. the aggressiveness levels exhibited by this mouse were recording in the combinations: d vs. d and s vs. s. two groups were formed: group i with 12 pairs of d males and 13 of s males, and group ii with 11 pairs of d males and 14 of s males. in group i the aggressiveness lev ... | 1996 | 9332618 |
| sleep patterns of the volcano mouse (neotomodon alstoni alstoni). | sleep-waking patterns of the volcano mouse were studied under laboratory conditions. this rodent exhibits four states of vigilance: active wakefulness (aw), quiet wakefulness (qw), slow-wave sleep (sws), and paradoxical (ps), or rapid-eye movement (rem) sleep. these states present, in general, the classic mammalian electrophysiological patterns. although sleep periods were distributed at any time of the nychthemeral cycle, they showed the tendency to concentrate between 0800 and 2000 hours. the ... | 1998 | 9761235 |
| ultrastructure and motility of the caudal epididymis spermatozoa from the volcano mouse (neotomodon alstoni alstoni merriam, 1898). | the volcano mouse neotomodon alstoni alstoni is a genus endemic to the higher elevations of the mexican transvolcanic belt. in the present study we examined for the first time the morphological features of the spermatozoa taken from the caudal epididymis of this species by transmission and scanning electron microscopy. spermatozoan motility was studied in sucrose and bicarbonate solutions; vitality and morphology were observed by light microscopy. transmission electron microscopy shows that the ... | 2000 | 10951391 |
| cdna sequence, 5'-flanking region, and promoter activity of the neotomodon alstoni alstoni clara cell secretory protein gene. | to better understand the phylogenetic divergence and the species-specific characteristics of the clara cell secretory protein (ccsp), we cloned the cdna encoding the neotomodon ccsp (nccsp) and analyzed its tissue-specific expression. the full-length cdna is 451bp long and predicts an amino acid sequence of 93 residues. northern blot analysis from different neotomodon tissues demonstrated that the mrna of ccsp appears to be solely expressed in the lung. to study the transcriptional regulation of ... | 2004 | 15196991 |
| the harderian gland of the mexican volcano mouse neotomodon alstoni alstoni (merriam 1898): a morphological and biochemical approach. | the harderian glands of rodents are large intraorbital exocrine glands with histologic organization that varies among mammalian species. here we describe some ultrastructural and biochemical features of the harderian gland in the mexican volcano mouse neotomodon alstoni alstoni, a species of restricted habitat. the harderian glands from male and female adult mice were dissected, processed and embedded in epon 812 for light and electron microscopy studies. porphyrin and total lipids were biochemi ... | 2005 | 15612008 |
| paternal behavior and testosterone plasma levels in the volcano mouse neotomodon alstoni (rodentia: muridae). | paternal behavior and testosterone plasma levels in the volcano mouse neotomodon alstoni (rodentia: muridae). although initially it was thought that testosterone inhibited the display of paternal behavior in males of rodents, it has been shown that in some species high testosterone levels are needed for exhibition of paternal care. in captivity, males of volcano mouse (neotomodon alstoni) provide pups the same care provided by the mother, with the exception of suckling. here we measured plasmati ... | 2009 | 19637720 |
| molecular cloning and functional analysis of the fsh receptor gene promoter from the volcano mouse (neotomodon alstoni alstoni). | to gain further insights on the genetic divergence and the species-specific characteristics of the follicle-stimulating hormone receptor (fshr), we cloned 946 bp of the 5'-flanking region of the fshr gene from the volcano mouse (neotomodon alstoni alstoni), and compared its features with those from other mammalian species. the sequence of neotomodon fshr (nfshr) gene from the translation initiation site to -946 is 74, 71, 64, and 59% homologous to rat, mouse (129/j), human, and sheep, respective ... | 2010 | 19862645 |
| obesity alters circadian behavior and metabolism in sex dependent manner in the volcano mouse neotomodon alstoni. | the aim of the present study is to evaluate whether circadian locomotor activity, and the daily profile of plasma parameters related to metabolic syndrome (nutrients: glucose and triacylglycerides, and hormones: insulin and leptin), differ between male and female neotomodon alstoni mice, both lean and obese. young adult animals were captured in the field and kept at the laboratory animal facility. after 6 to 7 months feeding the animals ad libitum with a regular diet for laboratory rodents, 50-6 ... | 2012 | 22001494 |
| cytogenetic analysis of neotomodon alstoni alstoni. | | 2015 | 4474932 |
| daily cycle in hepatic lipid metabolism in obese mice, neotomodon alstoni: sex differences. | disruption of circadian rhythms influences the pathogenesis of obesity, particularly with the basic regulation of food intake and metabolism. a link between metabolism and the circadian clock is the peroxisome proliferator-activated receptors (ppars). the neotomodon alstoni mouse, known as the "mexican volcano mouse," may develop obesity if fed a normo-caloric diet. this manuscript documents the changes in part of the hepatic lipid homeostasis in both sexes of lean and obese n. alstoni mice, com ... | 2018 | 29370528 |
| ovariectomy influences the circadian rhythm of locomotor activity and the photic phase shifts in the volcano mouse. | recently, the relationship between the circadian system and female reproduction has been of great interest; ovarian hormones can modify the amount and distribution of daily activity differently in rodent species. the volcano mouse neotomodon alstoni is a species in which it is possible to study the circadian rhythm of locomotion, and it offers comparative information about the influence of ovaries on the circadian system. in this study, we used infrared crossings to compare free movement in inta ... | 2017 | 28988131 |
| neotomodon alstoni mice present sex differences between lean and obese in daily hypothalamic leptin signaling. | this article compared the effects of spontaneous obesity on the daily profile in the relative amount of the leptin receptor (leprb), and its output. that is the precursor pro-opiomelanocortin (pomc) over a 24-hour period and compared with differences in locomotion and food intake in periods of artificial light. differences between lean and obese mice were examined, as were sex differences. body weight, food intake and locomotor activity were monitored in freely moving lean and obese mice. hypoth ... | 2017 | 28617052 |
| decreased food anticipatory activity of obese mice relates to hypothalamic c-fos expression. | during daily food restriction (fr), obese neotomodon alstoni mice present decreased food anticipatory activity (faa) compared to lean mice. here, we investigated whether fos expression in hypothalamic nuclei involved in food synchronization and anticipation parallels decreased faa during daily fr of obese n. alstoni. locomotor activity of lean and obese mice in ad libitum feeding conditions was monitored for at least two weeks. then, a gradual restriction of food access was followed to establish ... | 2017 | 28527681 |
| hypothalamic expression of anorexigenic and orexigenic hormone receptors in obese females neotomodon alstoni: effect of fasting. | obesity is a world problem that requires a better understanding of its physiological and genetic basis, as well as the mechanisms by which the hypothalamus controls feeding behavior. the volcano mouse neotomodon alstoni develops obesity in captivity when fed with regular chow diet, providing a novel model for the study of obesity. females develop obesity more often than males; therefore, in this study, we analysed in females, in proestrous lean and obese, the differences in hypothalamus expressi ... | 2014 | 24401125 |
| dear enemy effect in the mexican volcano mouse neotomodon alstoni: implications of sex in the agonistic behaviour among neighbours. | two opposite phenomena have been found in territorial animals, the "dear enemy'' and the "nasty neighbour'', which refer to individuals that show less aggression toward neighbours than toward strangers and vice versa. however, the need to maintain territory should differ for males and females because sexual reproduction is the result of the different adaptive strategies of the sexes. in this study, we explore territorial behaviour in the context of dear-enemy and nasty neighbour effects in the m ... | 2020 | 32976966 |
| melanin-concentrating hormone peptidergic system: comparative morphology between muroid species. | melanin-concentrating hormone (mch) is a conserved neuropeptide, predominantly located in the diencephalon of vertebrates, and associated with a wide range of functions. while functional studies have focused on the use of the traditional mouse laboratory model, critical gaps exist in our understanding of the morphology of the mch system in this species. even less is known about the nontraditional animal model neotomodon alstoni (mexican volcano mouse). a comparative morphological study among the ... | 2019 | 31152440 |
| the volcano mouse neotomodon alstoni of central mexico, a biological model in the study of breeding, obesity and circadian rhythms. | the "mexican volcano mouse" neotomodon alstoni, is endemic of the transverse neovolcanic ridge in central mexico. it is considered as least concern species and has been studied as a potential laboratory model from different perspectives. two lines of research in neuroendocrinology have been addressed: reproduction and parental care, particularly focused on paternal attention and the influence of testosterone, and studies on physiology and behavior of circadian rhythms, focused on the circadian b ... | 2019 | 29702105 |
| differences in photic entrainment of circadian locomotor activity between lean and obese volcano mice (neotomodon alstoni). | obesity is a growing problem worldwide with a clear impact on health status. it is also a condition that negatively affects circadian rhythms. when the mouse neotomodon alstoni is fed a regular rodent chow, some individuals develop obesity, representing an opportunity to compare the effects of spontaneous obesity upon the circadian organization in this species with that observed in other rodents with induced obesity. we report differences in the free running circadian locomotor activity rhythm a ... | 2017 | 30210555 |