ABSTRACT
Objective: To analyze the DNA methylations between two chemical types of Pogostemon cablin using MSAP technique. Methods: Methylation sensitive amplification polymorphism (MSAP) technique was used to detect the DNA methylation degree of two chemical type and a total of 197 P. cablin samples. Results: The highest or higher values of the Shannon polymorphism index of the four types of MSAP locus information were produced in the five areas of Yangchun, Deqing, Gaozhou Datong, Lubu, and Guangning. It formed two branches with P. cablin Shipaiensis (Pogostone-type) and the rest (Patchouliol-type). The percentage of variation among the populations was 60.66%, which was far greater than that within the population. A total of 10 differential fragments were screened out, sequenced and analyzed, one of those belongs to the serine/threonine protein kinase family. Conclusion: The MSAP technique can be used to identify the different origins of P. cablin. The formation of different chemical types of P. cablinis closely related to its DNA methylation level, and further research is needed.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the early changes of the blue-on-yellow (B/Y) perimetry in patients with early primary open-angle glaucoma(POAG).</p><p><b>METHODS</b>Thirty-one cases (45 eyes) of POAG underwent the central 30 degrees field examination of B/Y as well as routine white-on-white (W/W).</p><p><b>RESULT</b>No significant difference of mean index deficiency (MD) between B/Y and W/W perimetry was detected (P>0.05). However, there were marked changes in index GHT (glaucoma hemisphere test) and more defect points in B/Y visual field than those in W/W (P<0.01).</p><p><b>CONCLUSION</b>B/Y perimetry might be more sensitive than W/W perimetry a potentially more and valuable method in detection of early POAG lesion.</p>