The concentrations of thyroxine (TJ and triiodothyronine (T,) were determined on samples of fresh sera from adult male and female newts during the course of forelimb regeneration by means of radioimmunoassay (RIA) methods. The results show that the circulatory levels of T, and T3 in males and female
Insulin levels in the serum of intact and regenerating adult newts (Notophthalmus viridescens)
β Scribed by Liversage, Richard A. ;Banks, Brian J.
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 533 KB
- Volume
- 211
- Category
- Article
- ISSN
- 0022-104X
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Radioimmunoassay (RIA) procedures were used to determine whether or not insulin is present in the adult newt. The results show that measurable amounts of the hormone are present in samples ofpooled, fresh serum taken by cardiac puncture methods. We also found that there are no significant changes in the level of insulin in regenerating newts compared with intact animals.
π SIMILAR VOLUMES
## Abstract Five distinguishable stages of tail regeneration in the adult newt have been established. The stages are based on external morphological changes and internal histological characteristics rather than chronological age of the regenerate.
## Abstract Some aspects of the influence of position on regeneration have been examined by comparing regeneration from different levels along the newt tail. Tails amputated such that either threeβfourths, oneβhalf or oneβfourth of the tail was removed pass through the same morphological and histol
## Abstract Cyclophosphamide (cytoxan), a clinical immunosuppressant, produced a marked, persistent leukopenia (> 40% reduction) in adult newts in contrast to a transient, milder leukopenia accompanying amputations without cytoxan treatments. In addition, cytoxan suppressed the formation of regener
## Abstract Subsequent to excision and explantation of the limb blastema into culture medium, there is an abrupt reduction in mitotic index lasting several hours. Coincident with the disappearance of mitosis, abnormal mitotic figures (AMFs), lacking the condensed chromosomal nature of normal figure
## Abstract Denervationβinduced alterations in the composition of the soluble protein population of various stages of forelimb regenerates in the adult newt were examined. Denervation alters the normal protein arrays in three ways: (1) proteins may be eliminated from an array, (2) proteins not norm