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12 protocols using rat mouse pinp eia kit

1

Fasting Serum Collection for Bone Markers

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Serum was collected from mice after 6 hours of fasting for CTX-I and PINP assays. The assays were performed with the RatLaps ELISA or Rat/Mouse PINP EIA Kit (both from Immunodiagnostic Systems, Ltd.).
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2

Serum Biomarkers in Aged Mice

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Blood was collected from 8 week old male mice by cardiac puncture. Serum was separated by centrifugation at 1500 x g for 15 minutes. Serum levels of collagen N-propeptide (PINP) and tartrate resistant acid phosphatase (TRAcP) were measured by Rat/Mouse PINP EIA kit or MouseTRAP™ (TRAcP 5b) ELISA kit (Immunodiagnostic Systems, Tyne & Wear, UK), respectively, using the manufacturer’s protocol.
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3

Serum Biomarker Measurement Protocol

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Blood was collected retro-orbitally under inhalation of a 2% isoflurane/oxygen mix anesthesia immediately prior to sacrifice. Serum was obtained by centrifugation of blood in a MiniCollect tube (catalog no. 450472, Greiner Bio-one GmbH, Austria). The serum levels of TRAcP-5b, CTx-I, and PINP were measured by a mouse TRAP (TRAcP 5b) kit (SB-TR103), RatLaps (CTx-I) EIA (AC-06F1), and rat/mouse PINP EIA kit (AC-33F1) from Immunodiagnostic Systems following their instructions.
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4

Quantitative Determination of Bone Markers

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Quantitative determination of PINP and CTX-I was performed using a Rat/Mouse PINP EIA Kit (AC-33F, Immunodiagnostic systems, Tyne and Wear, UK) and a RatLaps CTX-I EIA Kit (AC-06F1, Immunodiagnostic systems), respectively, according to the manufacturer’s instructions.
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5

Fasting Serum Collection for Bone Markers

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Serum was collected from mice after 6 hours of fasting for CTX-I and PINP assays. The assays were performed with the RatLaps ELISA or Rat/Mouse PINP EIA Kit (both from Immunodiagnostic Systems, Ltd.).
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6

Bone Turnover Markers Measurement

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Serum P1NP concentration was measured with a Rat/Mouse PINP EIA kit (Immunodiagnostic Systems, Boldon, UK). Urine DPD concentration was measured with an Osteolinks DPD kit (Quidel, San Diego, CA, USA). Urine creatinine (Cr) concentration was measured with a 7180 Autoanalyzer (Hitachi High-Technologies Corporation, Tokyo, Japan).
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7

Bone Biomarker Measurement Protocol

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The following kits were used, following manufacturer’s instructions: CrossLaps (CTX-I) ELISA kit, RatLaps (CTX-I) EIA kit, Rat/Mouse PINP EIA kit (Immunodiagnostic Systems, Tyne and Wear, UK).
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8

μCT-based Bone Histomorphometry and Serum Markers

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μCT was performed using a Scanco μCT-35 instrument (SCANCO Medical) as described (Wei et al., 2010 (link)). Histomorphometry were performed as described (Wan et al., 2007a (link); Wei et al., 2011 (link)). Serum CTX-1 and P1NP were measured with RatLaps EIA kit and Rat/Mouse PINP EIA kit (Immunodiagnostic Systems). For LPS-induced bone loss, we i.p. injected mice at 6-8 weeks of age with PBS or LPS (5mg/kg) at day 0 and day 4, and sacrificed them at day 7.
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9

Bone Volume Evaluation via μCT and Histomorphometry

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μCT was performed to evaluate bone volume and architecture using a Scanco μCT-35 instrument (SCANCO Medical) as described (Wei et al., 2012 (link); Wei et al., 2010 (link)). Bone histomorphometry was performed as described (Wei et al., 2012 (link)). As a bone resorption marker, serum CTX-1 was measured with the RatLaps EIA kit (Immunodiagnostic Systems) (Wei et al., 2012 (link)). As a bone formation marker, serum PINP was measured with the Rat/Mouse PINP EIA kit (Immunodiagnostic Systems) (Wei et al., 2012 (link)).
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10

Comprehensive Bone Analysis Protocol

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μCT was performed using a Scanco μCT-35 instrument (Scanco Medical, Brüttisellen, Switzerland) as described (Wei et al., 2010 (link)). Histomorphometry were performed as described (Wan et al., 2007 (link); Wei et al., 2011 (link)). Serum CTX-1 bone resorption marker and P1NP bone formation marker were measured with RatLaps EIA kit and Rat/Mouse PINP EIA kit (Immunodiagnostic Systems, Tyne & Wear, United Kingdom), respectively. To analyze osteocyte gene expression, mouse femur was cut off at both ends to allow marrow cells to be flushed out with media. It was then soaked in PBS and spun down to remove residual marrow cells, and snap frozen in liquid nitrogen, stored at −80°C until RNA extraction.
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