title: Effects of subchronic exposure to lead acetate and cadmium chloride on rat's bone: Ca and Pi contents, bone density, and histopathological evaluation.
abstract: This study aims to investigate the effects of low-dose subchronic exposure to lead acetate (Pb(NO₃)₂) and cadmium chloride (CdCl₂·2.5H₂O) on bone in rats. The rats were assigned randomly to a control group and three experimental groups that were given the mixture of Pb(NO₃)₂ and CdCl₂·2.5H₂O by gastric gavage at doses of 0 mg/kg body weight (b.w.) (Group I, to serve as a control), 29.96 mg/kg b.w. (Group II, 29.25+0.71), 89.88 mg/kg b.w. (Group III, 87.74+2.14), and 269.65 mg/kg b.w. (Group IV, 263.23+6.42) for at least 90 consecutive days. Calcium (Ca) and phosphorus (Pi) contents in the bone were determined. Bone mineral density (BMD) was measured at the tibia and femur region by dual-energy X-ray absorbsiometry. The histopathology of bone was evaluated by light microscope, scanning electron microscope, and transmission electron microscope. The BMD of rats in the experimental group was significantly lower and the contents of Ca and Pi were decreased than those in the control group. The histopathological evaluation showed that co-induction of Pb and Cd results in bone microstructure damage, especially to trabecular bone, marrow cavity, collagen fiber, and osteoblast. In general, results indicate that combining Pb with Cd induces bone damage and increases the risk of osteoporosis.
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Hongke
authors.initials: H
authors.lastname: Lu
authors.affiliation: Analytical & Testing Center, Sichuan University Chengdu 610064, China.
authors.forename: Guiping
authors.initials: G
authors.lastname: Yuan
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Zhongqiong
authors.initials: Z
authors.lastname: Yin
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Shujun
authors.initials: S
authors.lastname: Dai
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Renyong
authors.initials: R
authors.lastname: Jia
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Xu
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Song
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: College of Veterinary Medicine, Sichuan Agricultural University Ya'an 625014, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Lv
mesh_terms: D015502:Absorptiometry, Photon; D000818:Animals; D015519:Bone Density / Q000187:drug effects*; D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000187:drug effects* / Q000378:metabolism / Q000648:ultrastructure; D019256:Cadmium Chloride / Q000633:toxicity*; D002118:Calcium / Q000378:metabolism*; D064347:Microscopy, Electrochemical, Scanning; D046529:Microscopy, Electron, Transmission; D009942:Organometallic Compounds / Q000633:toxicity*; D010024:Osteoporosis / Q000139:chemically induced* / Q000175:diagnosis / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D059550:Toxicity Tests, Subchronic
chemical_list: D009942:Organometallic Compounds; D010758:Phosphorus; D019256:Cadmium Chloride; C008261:lead acetate; D002118:Calcium
keywords: Lead and cadmium; bone microstructure; bone mineral density; calcium and phosphorus; rats; subchronic