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Objective To promote the development of precision medicine and gene sequencing technologies in China by analyzing the innovation situation in gene sequencing technologies.Methods An innovation situation research analysis frame was established with scientific literature and patent information as its basic data.The innovation situation in gene sequencing technologies was analyzed in aspects of scientific research and technical R & D.Results The research on gene sequencing technologies and technical R & D were focused on tumor diagnosis and treatment,plant gene sequencing,identification of HIV and gastrointestinal flora.Single cell genome amplification technology has greatly promoted the development of gene sequencing technologies.Conclusion The level of gene sequencing technologies and technical R & D in China is approaching to that in the world.
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Objective To assess cerebrovascular reserve ( CVR) function in patients with internal border zone infarction(IBZI) induced by severe middle cerebral artery (MCA) stenosis, and investigate the impact on progression and outcome of the disease .Methods A total of 84 patients with unilateral severe MCA stenosis were selected . Hypercapnia was induced by holding breath .The change of blood flow velocity in MCA was measured by transcranial Doppler ( TCD ) to calculate CVR .According to CVR , patients were divided into impaired regional CVR group ( CVR 0.05 ) .Conclusion Impaired regional CVR may be predictive of subsequent progressive cerebral infarction and poor clinical outcomes in patients with IBZI induced by severe MCA stenosis .