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  1. Wafa' Zahari, Ong, Wei Shen, Tan, Hong Jin, Azlina Ahmad, Khairul Bariah Ahmad Amin Noordin, Saaid Al Shehadat
    MyJurnal
    The present study aimed to determine the best polymerase chain reaction (PCR) conditions for
    amplification of odontoblast markers; alkaline phosphatase (ALP), dentin matrix protein 1 (DMP1), dentin
    sialophosphoprotein (DSPP) and osteopontin (OPN). Informed consent was obtained from the individuals
    prior to tooth extraction. RNA was extracted from odontoblasts obtained from extracted teeth using
    innuPREP RNA Mini kit (Analytik Jena, Germany). Five selected target factors in enhancing PCR: primer
    concentration, extension time, number of cycles, annealing time, and annealing temperature were
    manipulated to yield the correct size of amplicons. One step reverse transcriptase PCR reactions were
    performed using MyTaq One-Step RT-PCR kit (Bioline, USA) with a C1000 Thermal Cycler (Bio-Rad, USA)
    in a 25 µL reaction, keeping the amount of 2 ng/µL RNA, 0.25 µL reverse transcriptase, 0.5 µL RiboSafe
    Rnase inhibitor and 1X MyTaq One-Step Mix, constant. The optimal conditions were determined to be
    400nM of primers for DMP1 and DSPP, 200 nM for ALP and OPN; 30 seconds of extension time and 35
    PCR cycles for all genes; 10 seconds of annealing time for ALP, DMP1 and DSPP, 7 seconds for OPN. The
    annealing temperature were 56.4°C for ALP, 58.6°C for DMP1, 52.7°C for DSPP, and 56.3°C for OPN,
    respectively. The optimized PCR protocols produced the correct size of odontoblast markers.
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