Involvement of MAPK signaling pathway in the osteogenic gene expressions of Cervi Pantotrichum Cornu in MG-63 human osteoblast-like cells.
OBJECTIVE
The purposes of this study were to determine whether Cervi Pantotrichum Cornu (CPC) has osteogenic activities in human osteoblastic MG-63 cells and to investigate the underlying molecular mechanism.


METHODS
The effects of CPC on alkaline phosphatase activity, collagen synthesis, and calcium deposits were measured. The COL1A1, ALPL, BGLAP, and SPP1 expressions were measured by real-time PCR. Phosphorylated MAP kinases (ERK1/2, JNK1/2, p38, ELK1, and cJUN) were studied by western blot analysis. The involvement of MAPK pathway in osteogenic gene expressions was determined by using each selective MAPK inhibitor (PD98059, SP600125, and SB203580).


RESULTS
CPC increased alkaline phosphatase activity, collagen synthesis, and calcium deposits. CPC activated ERK1/2, JNK1/2, p38, and ELK1 phosphorylation except cJUN. CPC increased the COL1A1, ALPL, BGLAP, and SPP1 gene expressions. The elevated COL1A1 and BGLAP expressions were inhibited by PD98059, SP600125 or SB203580. The elevated ALPL expression was blocked by SB203580. The elevated SPP1 expression was inhibited by SP600125 or SB203580. CPC increased COL1A1 and BGLAP expressions via ERK1/2, JNK1/2, and p38 MAPKs pathways and SPP1 expression via JNK1/2 and p38 pathways. p38 pathway is needed for ALPL expression.


CONCLUSIONS
These results imply that MAPK signaling pathway is an indispensable factor for bone matrix genes expression of CPC in MG-63 human osteoblast-like cells.
Dept. of Acupuncture & Moxibustion, College of Korean Medicine, Daegu Haany University, Kyeongbuk 712-715, Republic of Korea.
Jee Hyun
JH
Kim
Dept. of Diagnostics, College of Korean Medicine, Daegu Haany University, Kyeongbuk 712-715, Republic of Korea.
Tae Young
TY
Jung
Comprehensive and Integrative Medicine Institute, Daegu 705-718, Republic of Korea.
Jungchul
J
Seo
College of Korean Medicine, Semyung University, Chungbuk 390-711, Republic of Korea.
Sena
S
Lee
College of Korean Medicine, Semyung University, Chungbuk 390-711, Republic of Korea.
Myung-Gyou
MG
Kim
College of Korean Medicine, Semyung University, Chungbuk 390-711, Republic of Korea. Electronic address: heavenok@dreamwiz.com.
Kang-Hyun
KH
Leem
Dept. of Acupuncture & Moxibustion, College of Korean Medicine, Daegu Haany University, Kyeongbuk 712-715, Republic of Korea. Electronic address: now123@dreamwiz.com.
Sung Chul
SC
Lim
D000469:Alkaline Phosphatase / Q000187:drug effects / Q000378:metabolism; D000818:Animals; D000873:Anthracenes / Q000494:pharmacology; D000999:Antlers / Q000737:chemistry*; D015153:Blotting, Western; D002118:Calcium / Q000378:metabolism; D002460:Cell Line; D003094:Collagen / Q000096:biosynthesis / Q000187:drug effects; D003670:Deer; D005419:Flavonoids / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects*; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D020935:MAP Kinase Signaling System / Q000187:drug effects*; D008297:Male; D010006:Osteoblasts / Q000187:drug effects* / Q000378:metabolism; D010012:Osteogenesis / Q000187:drug effects* / Q000235:genetics; D011725:Pyridines / Q000494:pharmacology; D060888:Real-Time Polymerase Chain Reaction
D000873:Anthracenes; D005419:Flavonoids; D007093:Imidazoles; D011725:Pyridines; C432165:pyrazolanthrone; D003094:Collagen; D000469:Alkaline Phosphatase; C093642:SB 203580; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one; D002118:Calcium
ALPL; BGLAP; COL1A1; Cervi Pantotrichum Cornu; ELK1; ERK1/2; JNK1/2; MAPK; MG-63; Osteoblast; SPP1; cJUN; p38