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Serum microRNAs are promising novel biomarkers
Authors:Gilad Shlomit  Meiri Eti  Yogev Yariv  Benjamin Sima  Lebanony Danit  Yerushalmi Noga  Benjamin Hila  Kushnir Michal  Cholakh Hila  Melamed Nir  Bentwich Zvi  Hod Moshe  Goren Yaron  Chajut Ayelet
Institution:Rosetta Genomics Ltd, Rehovot, Israel.
Abstract:

Background

Circulating nucleic acids (CNAs) offer unique opportunities for early diagnosis of clinical conditions. Here we show that microRNAs, a family of small non-coding regulatory RNAs involved in human development and pathology, are present in bodily fluids and represent new effective biomarkers.

Methods and Results

After developing protocols for extracting and quantifying microRNAs in serum and other body fluids, the serum microRNA profiles of several healthy individuals were determined and found to be similar, validating the robustness of our methods. To address the possibility that the abundance of specific microRNAs might change during physiological or pathological conditions, serum microRNA levels in pregnant and non pregnant women were compared. In sera from pregnant women, microRNAs associated with human placenta were significantly elevated and their levels correlated with pregnancy stage.

Conclusions and Significance

Considering the central role of microRNAs in development and disease, our results highlight the medically relevant potential of determining microRNA levels in serum and other body fluids. Thus, microRNAs are a new class of CNAs that promise to serve as useful clinical biomarkers.
Keywords:
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