Histologic modification by cryopreservation in rat aortic allografts

• Published in: The Annals of thoracic surgery Vol. 60; no. 2; pp. S168 - S171
• Main Authors: Motomura, Noboru, Imakita, Masami, Yutani, Chikao, Takamoto, Shinichi, Kitoh, Yoshitsugu, Tsuji, Takayuki, Kawashima, Yasunaru, Wada, Yukio, Oka, Takahiro
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY Elsevier Inc 01-08-1995; Elsevier Science
• Subjects: Animals; Aorta, Thoracic - pathology; Aorta, Thoracic - transplantation; Biological and medical sciences; Cardiovascular system; Cell Survival; Cryopreservation; Culture Techniques; Investigative techniques, diagnostic techniques (general aspects); Medical sciences; Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques; Rats; Rats, Inbred BN; Rats, Inbred Lew; Transplantation, Homologous; Transplantation, Isogeneic; Tunica Intima - pathology; Tunica Media - pathology
• ISSN: 0003-4975; 1552-6259
• DOI: 10.1016/0003-4975(95)00337-K

Histologic changes after the cryopreserved rat aortic transplantation were studied, and the influences of the cryopreservation and of the allografting on the histology were examined. Four groups of Brown Norway (RT1★) and Lewis rats (RT1★) were used (n = 4 at each examined period in each group): the cryopreservation-allograft group (from Brown Norway to Lewis with cryopreservation), the cryopreservation-isograft group (from Lewis to Lewis with cryopreservation), the fresh allograft group (from Brown Norway to Lewis without cryopreservation), and the fresh isograft group (from Lewis to Lewis without cryopreservation). The graft was harvested from a descending thoracic aorta of a donor rat, implanted to an infrarenal abdominal aorta of a recipient rat, and extracted at 10 days, 1, 3, 6, and 12 months after the operation. The intimai thickening, cellular loss in the media, and cellular infiltration in the adventitia were observed, which were the same phenomena seen in chronic rejection of human organ allografts. Although the degree of intimal thickening and cellular loss in the media were higher in the cryopreserved groups than in the fresh groups, the cryopreservation procedure suppressed cellular infiltration in the adventitia after allotransplantation. The immunologic attack against the graft might be diminished by cryopreservation.