في بحث متقدم ، أثبت العلماء أن المضاد الحيوي أمينوغليكوزيدات (جنتاميسين) يمكن استخدامه لعلاج الخرف العائلي.
• مضادات حيوية gentamicin, neomycin, streptomycin etc are commonly used to treat bacterial infections. These are broad spectrum مضادات حيوية ينتمي إلى الأمينوغليكوزيد فئة وتنشط بشكل خاص ضد البكتيريا سالبة الجرام. أنها تعمل عن طريق الارتباط مع الريبوسومات البكتيرية وتمنع بروتين التوليف في حساسة بكتيريا.
But aminoglycosides are also known to induce mutation suppression in eukaryotes to produce full length protein. This is a lesser known function of this مضاد حيوي which has been used in the past to treat several human diseases such as Duchenne muscular dystrophy (DMD) [2]. Now, there is report that this function may be used in treating الخرف وكذلك في المستقبل القريب.
In a paper published on 08 January 2020 in the journal, Human Molecular Genetics, the researchers of University of Kentucky have provided proof of concept that these مضادات حيوية may be used to treat frontotemporal الخرف [1]. This is an exciting breakthrough in science that has potential to improve quality of lives of several people with الخرف.
مرض عقلي is a group of symptoms involving deterioration in ability to perform usual daily activities and is caused due to deterioration in cognitive function like memory, thinking or behavour. It is a major reason of disability and dependency among elderly people worldwide. It affects carers and families as well. According to an estimate, there are 50 million people with الخرف worldwide with 10 million new cases every year. Alzheimer مرض هو الشكل الأكثر شيوعًا لـ الخرف. Frontotemporal الخرف is the second-most common form. This is early onset in nature and affects frontal and temporal lobes of the brain.
The patients with frontotemporal الخرف have progressive atrophy of frontal and temporal lobes of the brain that leads to gradual deterioration of cognitive functions, language skills and personality and behavioral changes. This is heritable in nature caused by genetic mutations. As a result of these genetic mutations, the brain is unable to form a protein called progranulin. The insufficient production of progranulin in the brain in linked to this form of الخرف.
In their study, the University of Kentucky researchers have found that if aminoglycoside مضادات حيوية were added to the neuronal cells with progranulin mutations in an in vitro cell culture, they skip the mutation and form full length protein. The progranulin protein level was recovered up to about 50 to 60%. This finding supports the principle that aminoglycoside (gentamicin and G418) hold the treatment possibility for such patients.
Next step would be to move forward from ”in vitro cell culture model” to ”animal model”. The mutation suppression by aminoglycosides as a therapeutic strategy to treat frontotemporal الخرف has come one step closer.
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{يمكنك قراءة ورقة البحث الأصلية عن طريق النقر فوق ارتباط DOI الوارد أدناه في قائمة المصدر (المصادر) المذكورة}
المصدر (ق)
1. Kuang L., et al, 2020. Frontotemporal الخرف nonsense mutation of progranulin rescued by aminoglycosides. Human Molecular Genetics, ddz280. DOI: https://doi.org/10.1093/hmg/ddz280
2. Malik V. ، وآخرون ، 2010. قمع الطفرات التي يسببها الأمينوغليكوزيد (وقف قراءة الكودون) كإستراتيجية علاجية لحثل دوشين العضلي. التطورات العلاجية في الاضطرابات العصبية (2010) 3 (6) 379389. DOI: https://doi.org/10.1177/1756285610388693
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