Naslov
Usporedne osobitosti građe hipofize u konja, psa, dobrog dupina i plavobijelog dupina
(Comparative characteristics of the pituitary of the horse, dog, bottlenose dolphin and striped dolphin)

Autori
Domitran, Goran

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad, diplomski

Fakultet
Veterinarski fakultet

Mjesto
Zagreb

Datum
15.03

Godina
2007

Stranica
37

Mentor
Lucić, Hrvoje

Neposredni voditelj
Vuković, Snježana

Ključne riječi
hipofiza dupina; dobri dupin; plavobijeli dupin; pars intermedia hipofize
(dolphin pituitary; bottlenose dolphin; striped dolphin; pars intermedia hypophyse)

Sažetak
Slabo je poznata detaljnija mikroskopska anatomija većine organa pa tako i hipofize morskih sisavaca. Ovo istraživanja opisuje osnovnu mikroskopsku građu hipofize dobrog i plavobijelog dupina primjenom različitih metoda histološkog bojenja, uspoređuje ih međusobno, kao i sa hipofizama konja i psa koje svojom morfologijom odgovaraju tipičnim hipofizama kopnenih sisavaca. Hipofiza u obje istražene vrste dupina je izdužena, oblika spljoštenog štapića, poprečno položenog na dno lubanjske šupljine. Držak hipofize i pars nervosa nalaze se u središnjem dijelu organa te na taj način svojim oblikom hipofiza dupina odstupa od sličnog oblika hipofize kako u konja i psa, tako i u drugih kopnenih sisavaca i čovjeka. Nastavljajući se na infundibulum, pars nervosa hipofize dupina dijeli se na dva kraka od kojih svaki, razgranavajući se, urasta u postrane dijelove hipofize koji čine njen pars distalis. Zbog ovakvog odnosa adenohipofize i neurohipofize dupina teško je govoriti o neurohipofizi kao stražnjem i adenohipofizi kao prednjem režnju hipofize. U pars distalis hipofize obje istražene vrste dupina dobro se diferenciraju kromofobne i kromofilne stanice Prema neurohipofizi i središnjem dijelu hipofize broj kromofobnih stanica se smanjuje, a povećava se broj bazofilnih stanica. Ovakav odnos i raspored stanica pars distalis u konja i psa nije uočen. Sve stanice pars distalis hipofize obje istražene vrste dupina reagiraju PAS pozitivno, a obojenje je znatno intenzivnije nego u stanicama hipofize konja i psa. Osnovna razlika hipofiza istraženih vrsta dupina, konja i psa je ta, što se u dupina ne nalaze stanice pars intermedia niti šupljina hipofize U pars distalisu hipofize kako plavobijelog, tako i dobrog dupina uočene su nakupine stanica koje su više ili manje pravilnog, okruglog ili ovalnog oblika, oštro ograničene od ostalih stanica adenohipofize. Stanice te nakupine u hipofizi dupina slično reagiraju na histološke boje, a i svojim izgledom podsjećaju na stanice pars intermedia hipofize konja i psa što otvara mogućnost pretpostavke da su nakupine nespecifičnih stanica zapravo stanice pars intermedia hipofize dupina.

Izvorni jezik
Engleski

Napomena
Detailed microscopic anatomy of the most organs, also as pituitary of the marine mammals is less known. Those investigations intend to describe general microscopic structure of the pituitary of the bottlenose dolphin and striped dolphin with different histological techniques, and compare its results between two dolphin species and with the same data of the well-known pituitaries of horse and dog as typical land mammals. Pituitary of the both investigated dolphins is elongate, with shape of the flattened baton, which is transversally place on the bottom of the cranial cavity. Infundibulum and pars nervosa are located in the middle part of pituitary, and because of that dolphin’s pituitary is different from the pituitary of dog, horse, and human and other land mammals. Pars nervosa of the dolphin pituitary is pursue from the infundibulum, and it is divided on two arms which is ramificated, and which ingrowths in the lateral part or pars distalis of the pituitary. Because of that relation between neurohypophyse and adenohypophyse, it is difficult to talking about neurohypophyse as anterior, and adenohypophyse as posterior lobe of the dolphin’s pituitary. The cells of the pars distalis pituitary of the both investigated dolphins are well differentiating. The number of the chromophobe adenohypophysal cells decrease from peripheral to the central part of the pituitary and neurohypophyse, and number of the basophile chromophile cells are increase. That relation and arrangement of the adenohypophysal cells was not observed in the pituitary of horse and dog. All cells of the pars distalis of the both investigated dolphins are positive on the PAS reaction, and that coloring is much intensive than in the same cells of the horse and dog. General difference between pituitary of investigated dolphins and horse and dog is absence of the pars intermedia and hypophyseal cavity in dolphin pituitary. In the pars distalis of the pituitary of the both investigated dolphins observed was circular or oval shaped groups of cells which are sharp demarcate from the other or typical adenohypophyseal cells. Cells of those groups from dolphin’s pituitary have similar reactions on histological coloring as the cells of the pars intermedia of the horse and dog pituitary. That data open new hypothesis about possibility that those unspecific cells in dolphin pituitary are cells of pars intermedia of the dolphin’s pituitary.

POVEZANOST RADA