Also known as Intact N Terminal Propeptide Of Type 1 Procollagen Automated Blood
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What is this test?

Procollagen type I propeptides are derived from collagen type I, which is the most common collagen type found in mineralized bone. In bone, collagen is synthesized by osteoblasts in the form of procollagen. This precursor contains a short signal sequence and terminal extension peptides: amino-terminal propeptide (PINP) and carboxy-terminal propeptide. These propeptide extensions are removed by specific proteinases before the collagen molecules form. Both propeptides can be found in the circulation and their concentration reflects the synthesis rate of collagen type I. Although collagen type I propeptides may also arise from other tissues (such as the skin, vessels, fibrocartilage, and tendons), most nonskeletal tissues exhibit a slower turnover than bone, and contribute very little to the circulating pool of PINP. PINP is considered the most sensitive marker of bone formation and it is particularly useful for monitoring bone formation therapies and antiresorptive therapies; it is recommended that the test be performed at baseline before starting osteoporosis therapy and again 3 to 6 months later. PINP could be detected in the circulation as the "intact" or trimeric molecule and the monomer. In osteoporosis subjects with normal renal function, the predominant form of PINP detected in circulation is the trimeric form. However, monomeric PINP fragments may accumulate in patients with renal failure or metastatic bone disease.

Also known as P1NP Automated Blood, Intact N Terminal Propeptide Of Type 1 Procollagen.

Test Preparation

No special preparation is needed for P1NP. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing P1NP. Your doctor depending on your condition will give specific instructions.

Understanding your test results

GenderAge groupsValue
MALEAll age groups22-87 mcg/L
FEMALEAll age groups19-83 mcg/L (Premenopausal) and 16-96 mcg/L (Postmnopausal)
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