“هدف جديد” في جسم الإنسان.. كيف يصل فيروس كورونا إلى الدماغ؟

على خلاف ما هو معروف حتى الآن من استهداف فيروس كورونا للجهاز التنفسي، كشفت دراسة حديثة كيفية وصول الفيروس إلى الدماغ، من خلال تتبع المسار الذي يسلكه داخل جسم المريض.

وأكد باحثون في دراسة قدمت الثلاثاء خلال الاجتماع السنوي للجمعية الفسيولوجية الأميركية، أن الخلايا العصبية في الحبل الشوكي تمثل مسارا يستخدمه فيروس كورونا  من أجل الوصول إلى الدماغ.

وقال الباحثون إن التجارب أثبت أن الفيروس ربط نفسه ببروتينات على سطح الخلايا العصبية أو على الخلايا العصبية نفسها، مما قد يفسر كيفية انتشاره بسهولة في دماغ بعض المصابين بـ”كوفيد 19

وأضافوا أن الفيروس يرتبط أيضا بالبروتينات الموجودة على سطح ما تسمى “الخلايا النجمية”، وهي خلايا في النخاع الشوكي حمي الخلايا العصبية من التلف.

وقد توفر النتيجتان أدلة على كيفية تسببب فيروس كورونا في تلف عصبي كبير لدى بعض المرضى، وفقا للباحثين.

وقال المؤلف المشارك في الدراسة ريكاردو كوستا، في بيان: “بينما تظهر الخلايا النجمية مقاومة أعلى للعدوى، يبدو أن الخلايا العصبية أكثر عرضة للإصابة”

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