Regenerative capacity of the planarian Girardia tigrina and the snail Helix lucorum exposed to microgravity during an orbital flight on board the international space station
| Autor: | G. I. Gorgiladze |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Extraterrestrial Environment
Light Snail Biology Spaceflight Girardia tigrina General Biochemistry Genetics and Molecular Biology law.invention Orbital flight law biology.animal Electroretinography Animals Regeneration Spacecraft Ocular Physiological Phenomena General Immunology and Microbiology Weightlessness Helix Snails Planarians General Medicine Anatomy Space Flight biology.organism_classification Helix lucorum On board Planarian General Agricultural and Biological Sciences Photic Stimulation Biosatellite |
| Zdroj: | Doklady Biological Sciences. 421:244-247 |
| ISSN: | 1608-3105 0012-4966 |
| DOI: | 10.1134/s0012496608040078 |
| Popis: | 244 A better understanding of the role of gravity in various processes vitally important for terrestrial organisms is a paradigm of space biology. In particular, regeneration of injured or lost organs and tissues is studied under the conditions of a spaceflight. The available experimental data on regenerative morphogenesis under microgravity are scarce and contradictory. As reported in [1‐3], amputated limbs, tails, retina, and crystalline lens of tritons Pleurodeles waltlii regenerated rapidly under microgravity. Other authors [4] have reported that regeneration of triton stumps under microgravity is noticeably delayed as compared to the terrestrial control (the regenerated bones have atypical lamellar structure). It should be emphasized that, in these experiments conducted on board spacecrafts Bion and Photon, the orbital flight lasted for about 16 days, whereas regeneration was studied a long time after the return to Earth. In another experiment, two Wistar rats that remained under microgravity for two weeks displayed a delayed posttraumatic regeneration: the size of the callus was reduced, and a lower strength of bone fragment consolidation was observed after the surgical fracture of the fibula (diaphysis) made two days before launching of a biosatellite (a terrestrial group of animals served as a control) [5]. Regeneration of the freshwater planarian Girardia tigrina , both whole animals and fragments, as well as regeneration of eye tentacles in the snail Helix lucorum , was studied during the orbital flight of the International Space Station (ISS). G. tigrina is an asexual race: when an animal reaches a certain body size, the hind part of the body is gradually constricted to break away from the fore part. During several days, two new planarians |
| Databáze: | OpenAIRE |
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