INCREASED BONE-FORMATION BY INTERMITTENT PARATHYROID-HORMONE ADMINISTRATION IS DUE TO THE STIMULATION OF PROLIFERATION AND DIFFERENTIATION OF OSTEOPROGENITOR CELLS IN BONE-MARROW

被引：196

作者：

NISHIDA, S ^{[1
]}

YAMAGUCHI, A ^{[1
]}

TANIZAWA, T ^{[1
]}

ENDO, N ^{[1
]}

MASHIBA, T ^{[1
]}

UCHIYAMA, Y ^{[1
]}

SUDA, T ^{[1
]}

YOSHIKI, S ^{[1
]}

TAKAHASHI, HE ^{[1
]}

机构：

[1] SHOWA UNIV, SCH DENT, TOKYO 142, JAPAN

来源：

BONE | 1994年 / 15卷 / 06期

关键词：

PARATHYROID HORMONE; BONE MARROW STROMAL CELL; CFU-F; OSTEOPROGENITOR CELLS;

D O I：

10.1016/8756-3282(94)90322-0

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

In order to examine the mechanism of the anabolic effect of parathyroid hormone (PTH) on bone formation, human PTH(1-34) [hPTH(1-34)] (30 mu g/kg) was injected subcutaneously to 9-week-old rats 5 times a week for 1 or 3 weeks. Trabecular bone volume (BV/TV) in the tibial metaphysis was not significantly different between the PTH- and vehicle-treated groups, but the parameters related to bone formation, including osteoid surface (OS/BS), mineralizing surface (MS/BS), mineral apposition rate (MAR), and bone formation rate (BFR/BS), were significantly increased as early as 1 week after PTH treatment. And the parameters related to bone resorption including eroded surface (ES/BS) and osteoclast number (N.Oc/BS) were also significantly increased as early as 1 week after PTH treatment. Treatment with PTH for 1 week induced no significant increase in bone mineral density at the femoral metaphysis, whereas the same treatment for 3 weeks induced a significant increase. When bone marrow cells isolated from femora and tibiae of either PTH-or vehicle-treated rats were cultured at a high density (2 x 10(7) cells/one well of 24-multiwell plate), cellular alkaline phosphatase (ALP) activity was significantly increased in the cells isolated from PTH-treated rats compared with vehicle-treated rats. When bone marrow cells were cultured at a low density (4 x 10(6) cells/a one well of 6-multiwell plate) to generate colonies (colony forming unit-fibroblastic, CFU-F), PTH induced apparent increases in both the total number of CFU-F and the number of ALP-positive CFU-F. The ratio of the latter to the former was significantly higher in the PTH-treated group than in the vehicle-treated group. These findings suggest that the anabolic effect of PTH is, at least in part, due to the stimulation of proliferation and differentiation of osteoprogenitor cells in bone marrow.

引用

页码：717 / 723

页数：7

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