Extramedullary erythropoiesis in human liver grafts.

TY - JOUR

T1 - Extramedullary erythropoiesis in human liver grafts.

AU - Schlitt, H J

AU - Schäfers, S

AU - Deiwick, A

AU - Eckardt, K U

AU - Pietsch, T

AU - Ebell, W

AU - Nashan, Björn

AU - Ringe, B

AU - Wonigeit, K

AU - Pichlmayr, R

PY - 1995

Y1 - 1995

N2 - Extramedullary erythropoiesis in the adult is very rare and is generally confined to situations of severe bone marrow irritation or replacement. In this study, we describe the occurrence of intrahepatic erythropoiesis in patients who have received a liver allograft and who have no evidence of bone marrow dysfunction. By routinely performed transplant aspiration cytology (TAC), marked intrahepatic erythropoiesis could be detected in 39 of 312 patients (12.5%) with liver allograft. In 19 patients, including 5 of 8 (63%) after combined liver and kidney transplantation, intrahepatic erythropoiesis occurred within the first 3 weeks after surgery. Twenty patients showed intrahepatic erythropoiesis between 3 weeks and 4 months after transplantation. Erythropoiesis was usually transient, lasting between 1 and 3 weeks. Cytologically, mature as well as immature erythroblasts of GlyA+ CD36+ CD45- phenotype could be detected in the grafts, whereas they were absent in blood; histologically, the cells could be localized to the sinusoids of the liver. There was no clear correlation of preoperative or postoperative hemoglobin levels, graft function, kidney function, and immunosuppressive medication with the presence or absence of erythropoiesis. Moreover, serum levels of erythropoietin (EPO) and stem cell factor (SCF) in patients with and without intrahepatic erythropoiesis in the early postoperative phase did not show significant differences. These findings show that intrahepatic erythropoiesis can occur transiently in human liver allografts and suggest that systemic stimuli as well as local factors may contribute to it.

AB - Extramedullary erythropoiesis in the adult is very rare and is generally confined to situations of severe bone marrow irritation or replacement. In this study, we describe the occurrence of intrahepatic erythropoiesis in patients who have received a liver allograft and who have no evidence of bone marrow dysfunction. By routinely performed transplant aspiration cytology (TAC), marked intrahepatic erythropoiesis could be detected in 39 of 312 patients (12.5%) with liver allograft. In 19 patients, including 5 of 8 (63%) after combined liver and kidney transplantation, intrahepatic erythropoiesis occurred within the first 3 weeks after surgery. Twenty patients showed intrahepatic erythropoiesis between 3 weeks and 4 months after transplantation. Erythropoiesis was usually transient, lasting between 1 and 3 weeks. Cytologically, mature as well as immature erythroblasts of GlyA+ CD36+ CD45- phenotype could be detected in the grafts, whereas they were absent in blood; histologically, the cells could be localized to the sinusoids of the liver. There was no clear correlation of preoperative or postoperative hemoglobin levels, graft function, kidney function, and immunosuppressive medication with the presence or absence of erythropoiesis. Moreover, serum levels of erythropoietin (EPO) and stem cell factor (SCF) in patients with and without intrahepatic erythropoiesis in the early postoperative phase did not show significant differences. These findings show that intrahepatic erythropoiesis can occur transiently in human liver allografts and suggest that systemic stimuli as well as local factors may contribute to it.

M3 - SCORING: Zeitschriftenaufsatz

VL - 21

SP - 689

EP - 696

JO - HEPATOLOGY

JF - HEPATOLOGY

SN - 0270-9139

IS - 3

M1 - 3

ER -