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سر طول العمر - ابحث عنه لدى الخفافيش

نجح باحثون في كشف بعض أسرار طول عمر نوع من الخفافيش، وهو الخفاش ذو الأذنين الكبيرتين الشبيهتين بأذني الفأر، وهو ما قد يفتح آفاقا أمام طب الشيخوخة لدى الإنسان.

 وقال الباحثون إن التيلومير أو التسلسل النووي المتكرر عند طرف الكروموسومات في هذه الفصيلة من الخفافيش لا يقل طوله بمرور العمر خلافا لما يكون عليه الأمر في الإنسان ومعظم الحيوانات الأخرى.


تعرف ايضا ماذا تحتاج لتعيش 100 عام أو اكثر

 ويعتبر الخفاش أطول الثدييات عمرا نسبة إلى حجمه، وإحدى فصائله هي تحديدا الأطول عمرا من بين جميع الخفافيش.


 ولا توجد سوى 19 فصيلة ثديية أطول عمرا من الإنسان نسبة إلى الحجم، 18 فصيلة منها من الخفافيش التي يتجاوز عمر بعضها أربعين عاما، والفصيلة الأخيرة هي نوع من القوارض الأفريقية الغريبة ويسمى فأر الخُلد العاري.

 وحدد الباحثون اثنين من الجينات في الخفاش ذي الأذنين الكبيرتين ربما يكونان المسؤولين عن تكيفها النادر مع تقدم العمر، وقالوا إن تلك الآليات ربما تكون محور دراسات مستقبلية عن تقدم العمر مع التركيز على حياة صحية أطول للإنسان.


 وقالت عالمة البيولوجيا في كلية دبلن الجامعية إيما تيلنغ -وهي إحدى قائدات فريق البحث- "دراسة الثدييات الأطول عمرا بوضوح والتي تمتلك آليات تطورت بشكل طبيعي لمحاربة تقدم العمر هي وسيلة بديلة لتحديد الأساس الجزيئي لطول العمر مع التمتع بالصحة".

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