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Series GSE71306 Query DataSets for GSE71306
Status Public on Jan 06, 2016
Title Scl-Ab: Exploratory 26-Week Subcutaneous Toxicology Study in the Aged Ovariectomized Female Sprague Dawley Rat with an 18-week Recovery [vertebrae]
Organism Rattus norvegicus
Experiment type Expression profiling by array
Summary This study is designed to compare and contrast the temporal and spatial changes in bone formation rates and transcriptional profiles in cortical and cancellous bone cell populations enriched by laser capture microdissection (LCM) in ovariectomized rats administered Scl-Ab by subcutaneous injection for up to 26 consecutive weeks, followed by a recovery period of up to 18 weeks.
Overall design Six-month-old Sprague-Dawley female rats were OVX, left untreated for 8 weeks. Rats were assigned to three treatment groups using a computerized blocking procedure designed to achieve body weight balance across treatment groups and then divided into three groups and administered by s.c. injection VEH or 3 or 50 mg/kg/wk of a Scl-Ab engineered to be less immunogenic in rats up to d183. Rats were administered either VEH or 3 or 50 mg/kg of Scl-Ab once weekly by s.c. injection. Up to 15 rats per group were euthanized at d8, 29, 85, and 183. To assess effects following treatment withdrawal, additional groups were maintained through a treatment-free period (TFP) and euthanized at d197 and 267 for VEH and 3 mg/kg groups and at d237 and 309 for VEH and 50 mg/kg groups. To label active bone-forming surfaces and facilitate osteoblast (OB) and lining cell (LC) enrichment during laser capture microdissection (LCM), 10 mg/kg calcein green was administered s.c. 13 and 3 days prior to scheduled euthanasia. At necropsy, the first and second lumbar vertebral (L1 and L2) bodies were isolated for histomorphometry and pQCT analyses, respectively. Cryosection preparation of L3 vertebral body, LCM procedure and validation of cell enrichment, RNA extraction and amplification, TaqMan, and initial microarray analysis was performed. LCM was performed on 4-6 ┬Ám cryosections of vertebrae from the first 5 animals per treatment group per timepoint to enrich for OB, LC, and osteocyte (OCy) subpopulations for transcriptional analyses using Affmetrix Rat 230_2 microarrays
Contributor(s) Taylor S, Ominsky MS, Hu R, Pacheco E, He YD, Buntich S, Afshari CA, Pyrah I, Nioi P, Boyce RW
Citation(s) 26721737
Submission date Jul 24, 2015
Last update date Jul 31, 2017
Contact name Scott Taylor
Organization name Amgen Inc.
Street address One Amgen Center Drive
City Thousand Oaks
State/province CA
ZIP/Postal code 91320-1799
Country USA
Platforms (1)
GPL1355 [Rat230_2] Affymetrix Rat Genome 230 2.0 Array
Samples (294)
GSM1831961 181770
GSM1831962 181771
GSM1831963 181772
BioProject PRJNA290869

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Supplementary file Size Download File type/resource
GSE71306_RAW.tar 608.9 Mb (http)(custom) TAR (of CEL)
Raw data provided as supplementary file
Processed data included within Sample table

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