Temperature and humidity alter prolactin receptor expression in the skin of toad (Bufo bankorensis and Bufo melanostictus)

Li, Kuo-Wei; Lee, Der-Nan; Huang, Wei‐Tung; Weng, Ching‐Feng

doi:10.1016/j.cbpa.2006.08.044

Cited by 6 publications

(6 citation statements)

References 33 publications

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“…4a) and experienced an average gain of 16Á4% body mass due to rehydration during this treatment. Rehydration rates are higher than dehydration rates due to various physiological adaptations, including a greater density of blood vessels in the ventral pelvic region, which is typically in contact with water (Duellman & Trueb 1986;Wells 2007), and changes in the expression of hormones such as prolactin, angiotensin and vasotocin, which have been shown to regulate water and electrolyte balance (Li et al 2006;Saitoh et al 2014;…”

Section: E N V I R O N M E N T a L P R E F E R E N C E S A R E A P R mentioning

confidence: 99%

Thermal and moisture habitat preferences do not maximize jumping performance in frogs

Mitchell

Bergmann

2015

Functional Ecology

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1. Amphibians are suffering population declines globally, and understanding how environmental parameters influence their thermal and moisture preferences and performance at various tasks is crucial to understanding how these animals will be influenced by climate change. 2. Body temperature and hydration affect organismal performance at many fitness-related tasks. Since amphibians are ectotherms with highly water-permeable skin, environmental temperature and moisture directly affect their body temperature and hydration. Therefore, amphibians should select habitats with the optimal combination of temperature and moisture to perform tasks necessary for survival. However, interactions between environmental temperature and moisture can influence habitat selection and task performance in different and often unpredictable ways, and this has only infrequently been considered. 3. We tested for interactions between environmental temperature, moisture and organismal hydration on temperature and moisture preferences and jumping performance in green frogs (Lithobates clamitans) in the laboratory, using thermal and moisture gradients, and high-speed video and force plate data. We then integrated the laboratory experiments with field data. 4. In the thermal and moisture gradients, frogs selected environmental conditions that minimized cutaneous evaporative water loss, hydroregulating more stringently than thermoregulating. These results are consistent with frogs in the field, which had highly variable body temperatures, but were always hydrated above 95% of their standard mass. However, conditions that minimized evaporative water loss frequently did not maximize jumping performance because warmer temperatures conferred greater performance. 5. The ecology of L. clamitans may explain the discrepancy between their preferences and jumping performance optima because the frogs remain in wet environments that serve as refuges from dehydration. In parts of their range where frogs are subjected to warmer and drier conditions, they are likely to select microhabitats that minimize the risk of dehydration, possibly at the expense of their ability to forage and escape from predators.

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Section: E N V I R O N M E N T a L P R E F E R E N C E S A R E A P R mentioning

confidence: 99%

Thermal and moisture habitat preferences do not maximize jumping performance in frogs

Mitchell

Bergmann

2015

Functional Ecology

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“…In larval tissue, PRLR mRNA was expressed in the brain and tail from premetamorphosis and the level increased toward late metamorphosis. Li et al (2006) showed by western blot analysis that temperature and humidity alter PRLR protein level in the skin of Bufo bankorensis Barbour, 1908 and Bufo melanostictus Schneider, 1799. These finding clearly indicate that PRL is important in the adaptation of amphibians to different environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the skin is protected and kept moist by the mucus produced by mucous glands (Li et al 2006). In studies with red-spotted newt, it was shown that PRL alters the secretion of mucous glands (Hoffman & Dent 1978;Singhas & Ward 1993), and in this regard the capability of mucous glands to respond to the external PRL application indicates the presence of PRLR in the gland cells.…”

Section: Discussionmentioning

confidence: 99%

“…Two types of skin glands, mucous glands and granular (serous) glands, are commonly found in the skin of adult amphibians. The mucus produced in mucous glands is homogenous and slimy, and it is composed principally of mucopolysaccharides, which maintain skin moisture and provide skin protection from damage through prolonged contact with water, and also reduce water loss through evaporation (Li et al 2006). Granular glands synthesize considerable amounts of bioactive peptides and aromatic biogenic amines (Nakajima 1981;Roseghini et al 1989) that help protect the organism from the enemies (Toledo et al 1992) and regulate the water balance of the skin (Delfino et al 1996).…”

Section: Introductionmentioning

confidence: 99%

“…In adult amphibian skin, PRLR has been detected by using different methods (D'Istria et al 1987;Muccioli et al 1989;Yamamoto et al 2000;Li et al 2006), although there is a lack of knowledge concerning localization of PRLR in the skin components. In this study, by using an immunohistochemical technique, we have investigated the localization and distribution of PRLR in the dorsal and ventral skin of Rana ridibunda Pallas, 1771 and discussed possible functions of PRL in different skin regions of the body.…”

Section: Introductionmentioning

confidence: 99%

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Localization of prolactin receptor in the dorsal and ventral skin of the frog (Rana ridibunda)

et al. 2010

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Abstract:The dorsal and ventral skin in amphibians plays an important role in osmoregulation. Prolactin hormone is involved in regulation of amphibian skin functions, such as water and electrolyte balance. Therefore, amphibians may be useful as a model for determining the sites of the prolactin receptor. In this study, prolactin receptor was detected in frog dorsal and ventral skin using immunohistochemical staining method. Prolactin receptor immunoreactivity was localized in all epidermal layers except stratum corneum of dorsal skin epidermis, stratum germinativum layer of ventral skin epidermis, myoepithelial cells, secretory epithelium and secretory channel cells of granular glands in both skin regions. The mucous glands and secretory granules of granular glands did not show immunoreactivity for the prolactin receptor. According to our immunohistochemical results, the more widespread detection of prolactin receptor in dorsal skin epidermis indicates that prolactin is more effective in dorsal skin. Presence of prolactin receptors in epidermis points out its possible osmoregulatory effect. Moreover, detection of receptor immunoreactivity in various elements of poison glands in the dermis of both dorsal and ventral skin regions suggests that prolactin has a regulatory effect in gland functions.

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Assessment of thyroid system disruption in Rana pipiens tadpoles chronically exposed to UVB radiation and 4-tert-octylphenol

et al. 2009

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Temperature and humidity alter prolactin receptor expression in the skin of toad (Bufo bankorensis and Bufo melanostictus)

Cited by 6 publications

References 33 publications

Thermal and moisture habitat preferences do not maximize jumping performance in frogs

Thermal and moisture habitat preferences do not maximize jumping performance in frogs

Localization of prolactin receptor in the dorsal and ventral skin of the frog (Rana ridibunda)

Assessment of thyroid system disruption in Rana pipiens tadpoles chronically exposed to UVB radiation and 4-tert-octylphenol

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