PMID- 29981921 OWN - NLM STAT- MEDLINE DCOM- 20180829 LR - 20180829 IS - 1879-3169 (Electronic) IS - 0378-4274 (Linking) VI - 295 DP - 2018 Oct 1 TI - Prenatal nicotine exposure retards osteoclastogenesis and endochondral ossification in fetal long bones in rats. PG - 249-255 LID - S0378-4274(18)31489-9 [pii] LID - 10.1016/j.toxlet.2018.07.005 [doi] AB - This study investigated the mechanisms underlying the retarded development of long bone in fetus by prenatal nicotine exposure (PNE) which had been demonstrated by our previous work. Nicotine (2.0 mg/kg.d) or saline was injected subcutaneously into pregnant rats every morning from gestational day (GD) 9 to 20. Fetal femurs or tibias were harvested for analysis on GD 20. We found massive accumulation of hypertrophic chondrocytes and a delayed formation of primary ossification center (POC) in the fetal femur or tibia of rat fetus after PNE, which was accompanied by a decreased amount of osteoclasts in the POC and up-regulated expression of osteoprotegerin (OPG) but by no obvious change in the expression of receptor activator of NF-kappaB ligand (RANKL). In primary osteoblastic cells, both nicotine (0, 162, 1620, 16,200 ng/ml) and corticosterone (0, 50, 250, 1250 nM) promoted the mRNA expression of OPG but concentration-dependently suppressed that of RANKL. Furthermore, blocking alpha4beta2-nicotinic acetylcholine receptor (alpha4beta2-nAChR) or glucocorticoid receptor rescued the above effects of nicotine and corticosterone, respectively. In conclusion, retarded osteoclastogenesis may contribute to delayed endochondral ossification in long bone in fetal rats with PNE. The adverse effects of PNE may be mediated via the direct effect of nicotine and indirect effect of maternal corticosterone on osteoblastic cells. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Hu, Hang AU - Hu H AD - Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China; Department of Physiology, Basic Medical School of Wuhan University, Wuhan 430071, China. FAU - Zhao, Xin AU - Zhao X AD - Department of Physiology, Basic Medical School of Wuhan University, Wuhan 430071, China. FAU - Ma, Jing AU - Ma J AD - Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China; Department of Physiology, Basic Medical School of Wuhan University, Wuhan 430071, China. FAU - Shangguan, Yangfan AU - Shangguan Y AD - Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China; Department of Orthopaedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China. FAU - Pan, Zhengqi AU - Pan Z AD - Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China; Department of Orthopaedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China. FAU - Chen, Liaobin AU - Chen L AD - Department of Orthopaedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China. FAU - Zhang, Xianrong AU - Zhang X AD - Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, No.1838 North of Guangzhou Avenue, Guangzhou, 510515, China. Electronic address: xianrongzh@smu.edu.cn. FAU - Wang, Hui AU - Wang H AD - Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China. Electronic address: wanghui19@whu.edu.cn. LA - eng PT - Journal Article DEP - 20180705 PL - Netherlands TA - Toxicol Lett JT - Toxicology letters JID - 7709027 RN - 0 (Nicotinic Agonists) RN - 0 (Osteoprotegerin) RN - 0 (RANK Ligand) RN - 0 (Receptors, Glucocorticoid) RN - 0 (Receptors, Nicotinic) RN - 0 (Tnfrsf11b protein, rat) RN - 0 (nicotinic receptor alpha4beta2) RN - 6M3C89ZY6R (Nicotine) RN - W980KJ009P (Corticosterone) SB - IM MH - Animals MH - Bone Development/*drug effects MH - Cells, Cultured MH - Chondrocytes/drug effects/metabolism/pathology MH - Corticosterone/toxicity MH - Female MH - Femur/*drug effects/embryology/metabolism MH - Gestational Age MH - Maternal Exposure/adverse effects MH - Nicotine/*toxicity MH - Nicotinic Agonists/*toxicity MH - Osteoclasts/drug effects/metabolism/pathology MH - Osteogenesis/*drug effects MH - Osteoprotegerin/metabolism MH - Pregnancy MH - RANK Ligand/metabolism MH - Rats, Wistar MH - Receptors, Glucocorticoid/metabolism MH - Receptors, Nicotinic/metabolism MH - Tibia/*drug effects/embryology/metabolism OTO - NOTNLM OT - Endochondral ossification OT - Nicotine OT - Osteoclastogenesis OT - Prenatal exposure EDAT- 2018/07/10 06:00 MHDA- 2018/08/30 06:00 CRDT- 2018/07/09 06:00 PHST- 2017/11/14 00:00 [received] PHST- 2018/06/06 00:00 [revised] PHST- 2018/07/04 00:00 [accepted] PHST- 2018/07/10 06:00 [pubmed] PHST- 2018/08/30 06:00 [medline] PHST- 2018/07/09 06:00 [entrez] AID - S0378-4274(18)31489-9 [pii] AID - 10.1016/j.toxlet.2018.07.005 [doi] PST - ppublish SO - Toxicol Lett. 2018 Oct 1;295:249-255. doi: 10.1016/j.toxlet.2018.07.005. Epub 2018 Jul 5.