| spinal cord self-repair during tail regeneration in polypedates maculatus and putative role of fgf1 as a neurotrophic factor. | spinal cord injury could be fatal in man and often results in irreversible medical conditions affecting mobility. however, anuran amphibians win over such pathological condition by the virtue of regeneration abilities. the tail of anuran tadpoles therefore allures researchers to study spinal cord injury and self- repair process. in the present study, we inflicted injury to the spinal cord by means of surgical transection of the tail and investigated the self-repair activity in the tadpoles of th ... | 2017 | 29133075 |
| behavioral, molecular and integrative mechanisms of amphibian osmoregulation. | amphibian water balance has been studied at many levels of biological order. terrestrial species must react to environmental cues that relate to water availability while some arboreal species have cutaneous skin secretions that can reduce evaporative water loss. the indian tree frog. polypedates maculatus, uses cutaneous secretions and wiping behavior to lower evaporation but also relies on moist microclimates to endure prolonged survival away from water. the related species, p. leucomystax, inh ... | 1999 | 10222590 |
| histological effects of vitamin a on the tail-amputated tadpoles of polypedates maculatus with special reference to homeotic transformation. | vitamin a is a very common teratogen causing severe embryonic malformations and changes in pattern formation in amphibians. the effects of vitamin a include the induction of duplication of skeletal structures in the anteroposterior, proximodistal and dorsoventral axes. the purpose of this investigation was to study the histological changes in the regenerating tail of the tadpoles of polypedates maculatus by treatment with vitamin a. the histological changes brought about by vitamin a included th ... | 1999 | 10352887 |
| changes in oxidative stress parameters and acid phosphatase activity in the pre-regressing and regressing tail of indian jumping frog polypedates maculatus (anura, rhacophoridae). | activities of acid phosphatase (normal and co2+-sensitive), superoxide dismutase and catalase and levels of lipid peroxidation, hydrogen peroxide were compared in the tails of tadpoles of stage iii, xviii, xxi and xxiii, respectively, of the indian jumping frog polypedates maculatus. it is noticed that acid phosphatase activity (normal and co2+-sensitive), and levels of lipid peroxidation and hydrogen peroxide increased during tail regression. there is also an increase in the level of superoxide ... | 2001 | 11701385 |
| specific limb abnormalities induced by hydrogen peroxide in tadpoles of indian jumping frog, polypedates maculatus. | hydrogen peroxide (h2o2), one of the reactive oxygen intermediates (roi) and a potential inducer of nuclear transcription factors induces consistent type of abnormal limb development (truncated with bent skeletal elements) in the tadpoles of indian jumping frog, polypedates maculatus. | 2001 | 11906101 |
| oxidative stress during vitamin a-induced abnormal tail regeneration in the tadpoles of polypedates maculatus. | vitamin a and its derivatives inhibit normal tail regeneration in amphibians. the most remarkable effect is the development of limbs at the cut end of the tail in anurans. prior to ectopic limb development, there is an abnormal tail regeneration in the treated tadpoles. the purpose of the present study was to compare oxidative stress condition in the regenerated tail of normal and vitamin a (10i u/ml, 72 h) treated tadpoles. the present findings show a hyper-oxidative stress condition in the reg ... | 2002 | 11959022 |
| simultaneous induction of ectopic pelvic zone and duplication of regenerated limbs in tadpoles of polypedates maculatus by vitamin a. | with a view to determine ectopic limb developing capacity along with normal hind limb regeneration in response to vitamin a palmitate in well-differentiated hind limb stage tadpoles of p. maculatus, higher doses of vitamin a (30 iu/ml and 20 iu/ml) were administered for a longer period (120 hr) to the tadpoles following tail amputation through middle and hind limb amputation through middle of thigh. simultaneous development of ectopic pelvic zone was observed along with hind limbs from the cut e ... | 2003 | 15320496 |
| involvement of cathepsin d during tail regression in tadpoles of the common indian tree frog, polypedates maculatus (anura: rhacophoridae). | cathepsin d, an aspartyl protease, plays a key role in the metabolic degradation of intracellular proteins in an acidic milieu of lysosomes. proteolysis plays an essential role in anuran tail regression and a wide variety of thyroid hormone induced proteolytic enzymes have been reported to be involved in the regressing tail. the present study describes the trend of specific activity of cathepsin d in the tail of different developmental stages and immunohistochemical localization of cathepsin d d ... | 2011 | 21195462 |
| histology of vitamin a induced ectopic limbs and normal hind limbs in tadpoles of polypedates maculatus. | marked histological similarities were observed between normal and vitamin a induced ectopic limb buds of p. maculatus. however, close association of nephric tubule and lateral plate mesoderm, as seen in normal hind limb bud does not seem to be essential for ectopic limb development. the ectopic limbs tend to develop in pairs. | 2004 | 15511006 |
| studies on tail regeneration and homeotic transformation in anuran tadpoles. | anuran tadpoles are excellent models for regeneration studies. the tail, an organ essential for swimming for the aquatic tadpole, regenerates completely following injury or amputation. however, treatment with the morphogen, vitamin a or retinoic acid inhibits normal tail regeneration and induces homeotic transformation of tail to limbs. this phenomenon was discovered for the first time in the indian marbled balloon frog uperodon systoma in the developmental biology laboratory of utkal university ... | 2020 | 32659020 |
| planning for ex situ conservation in the face of uncertainty. | ex situ conservation strategies for threatened species often require long-term commitment and financial investment to achieve management objectives. we present a framework that considers the decision to adopt ex situ management for a target species as the end point of several linked decisions. we used a decision tree to intuitively represent the logical sequence of decision making. the first decision is to identify the specific management actions most likely to achieve the fundamental objectives ... | 2016 | 26306549 |