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18 protocols using ctx 1

1

Serum Biomarkers of Bone Metabolism

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Serum PTH, Wnt10b and Procollagen 1 N-terminal Propeptide (P1NP) levels (n = 6 for each group) were measured in all experimental animals by using commercial enzyme-linked immunosorbent assay kits (PTH, Wnt10b and PINP are CUSABIO Biotech Co., Wuhan, China, and CTX-1 are Immunodiagnostic Systems, Boldon, United Kingdom.) according to the manufacturer’s guidance.
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2

Serum Biomarkers of Bone Metabolism

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Serum levels of osteocalcin (Biomedical Technologies), TRAP-5b (Immunodiagnostic Systems), and CTX-1 (Immunodiagnostic Systems) were determined by ELISA.
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3

Serum Biomarkers of Bone Metabolism in Mice

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Blood was collected from mice by cardiac puncture for analysis of several biochemical parameters. Serum total calcium was determined using Stanbio Laboratory Calcium Liquidcolor (CPC; Boerne, TX, USA; Catalog No. 0150‐250). Serum inorganic phosphate was determined using a Phosphate Colorimetric Assay Kit (BioVision, Inc., Milpitas, CA, USA; Catalog No. K410‐500). Serum C‐terminal telopeptides of types I and II collagen (CTX‐1 and CTX‐2; Immunodiagnostic Systems Inc., Fountain Hills, AZ, USA; Catalog No. AC‐06F1 and AC‐08F1, respectively), as well as N‐terminal propeptide of type I procollagen (P1NP) were determined using the RatLaps EIA kit (Immunodiagnostic Systems Inc., Fountain Hills, AZ, USA; Catalog No. AC‐33F1). Serum intact mouse parathyroid hormone (PTH(1‐84)) was measured using the mouse PTH(1‐84) EIA (Quidel Corp, San Diego, CA, USA; Catalog No. 60‐2305).
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4

Serum Biomarkers of Bone Turnover

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Enzyme immunoassays were used to detect serum levels of procollagen type 1 amino‐terminal peptide (P1NP) and carboxyl‐terminal crosslinks peptide of type 1 collagen (CTX1) (Immunodiagnostic Systems) and osteoprotegerin (OPG) and RANKL (R&D Systems) according to the manufacturer's instructions.
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5

Serum Biomarkers in Animal Study

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The levels of serum osteocalcin (Immunodiagnostic Systems, Tyne and Wear, UK), carboxyl-terminal telopeptides of type 1 collagen (CTX-1) (Immunodiagnostic Systems, Tyne and Wear, UK), leptin (IBL International GmbH, Hamburg, Germany), adiponectin (Qayee Bio-Technology, Shanghai, China), and insulin (SPI-Bio, Bertin Pharma, Saclay, France) were measured using commercial rat-specific quantitative enzyme-linked immunosorbent assay kits, in accordance with the manufacturer’s instructions.
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6

Measuring Bone Turnover Markers

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Enzyme-linked immunosorbent assay (ELISA) kits were used to measure serum Tartrate-resistant acid phosphatase-5b (TRAcP-5b) (Kamiya Biochemical Company, Seattle, WA) and C-terminal cross-linked telopeptides of type I collagen (CTx-1) (Immunodiagnostic Systems, Fountain Hills, AZ) according to the manufacturer’s instructions.
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7

Multiplex Analysis of Bone Biomarkers

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ELISA kits were used to detect the N-terminal propeptide of type 1 procollagen (P1NP), C-terminal telopeptide of type 1 collagen (CTX-1) (Immunodiagnostic Systems, Fountain Hills, AZ), receptor activator for nuclear factor κB ligand (RANKL), leptin, insulin-like growth factor-1 (IGF-1), adiponectin (R&D Systems, Minneapolis, MN, USA); and fibroblast growth factor-21 (FGF-21, Millipore Corp., Billerica, MA, USA). Multiplex analysis was conducted using a Luminex 200 system at the Human Immune Monitoring Core at Mount Sinai Icahn School of Medicine (New York, NY) using the metabolites for osteoprotegerin (OPG) and osteocalcin (OC, MBNMAG-41K, Millipore Corp.).
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8

Serum Biomarker Profiling in Mice

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Whole blood was collected via cardiac puncture at euthanasia; serum was isolated and stored at −80°C. Carboxy‐terminal collagen crosslinks type I collagen (CTX‐1; Immunodiagnostic Systems, East Boldon, UK), osteocalcin (OCN; Alfa Aesar, Haverhill, MA, USA), C3 (Abcam, Cambridge, UK), IL17A (R&D Systems), IGF‐1 (R&D Systems), and LCN2 (R&D Systems) were assessed by ELISA following the manufacturer's protocols.
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9

Serum Biomarkers for Bone Metabolism

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Serum was separated by centrifugation and stored at −80 until analysis. Samples were assayed for total osteocalcin (Invitrogen, Waltham, MA cat# KAQ1381), and c-terminal telopeptide crosslinks (CTX-1) (Immunodiagnostic Systems, Tyne & Wear, UK, cat# AC-02F1) by enzyme-linked immunosorbent assay (ELISA). Serum biomarkers levels were interpolated from curves generated by manufacturer-provided osteocalcin or CTX-1 standards, respectively, included in the assay.
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10

Serum Biomarker Profiling Protocol

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Blood samples were put at room temperature to clot for 2 h before centrifuging for 10 min at 2000 g. The resultant sera were stored at −80 °C until analysis. The levels of PINP (BlueGene Biotech, Shanghai, China), CTX‐1 (Immunodiagnostic Systems, UK), IFN‐γ (R&D Systems, MN, USA), TNF‐α and IL‐2 (ABclonal Technology, Wuhan, China), RANKL and OPG (BlueGene Biotech, Shanghai, China) in serum or conditioned medium were detected according to the manufacturer's instructions.
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