دراسة تربط خلايا الدم البشرية بأسلاف عاشت قبل 700 مليون عام

27 مايو، 2026

من إعداد الذكاء الاصطناعي

تتبع باحثون في جامعة كيوتو أصول خلايا الدم البشرية إلى كائنات وحيدة الخلية عاشت قبل حوالي 700 مليون سنة. ويظهر تحليلهم أن الخلايا المناعية الحديثة تعكس مساراً تطورياً قديماً يعود تاريخه إلى ظهور الحيوانات متعددة الخلايا.

طور الفريق طريقة جديدة لمقارنة التعبير الجيني عبر أنواع الخلايا والكائنات الحية المختلفة. سمح هذا النهج لهم ببناء أشجار تطورية لسلالات خلايا الدم وتحديد أوجه التشابه مع الكائنات وحيدة الخلية. وأظهرت الخلايا البلعمية أوضح الروابط بهذه الأسلاف المبكرة، مما يشير إلى أنها تمثل الشكل الأقدم لخلايا الدم.

Review argues some “senescent” cells can support tissue repair, complicating anti-aging strategies

22 مايو، 2026 من إعداد الذكاء الاصطناعي صورة مولدة بواسطة الذكاء الاصطناعي تم التحقق من الحقائق

A review in the journal Aging (Aging-US) says senescent cells—often dubbed “zombie cells”—can contribute to wound healing and tissue stability in some settings, even as other senescent cells promote inflammation and age-related disease.

UCLA scientists reverse liver damage in mice by removing zombie cells

Researchers at UCLA have identified senescent immune cells, dubbed 'zombie' cells, that accumulate in aging livers and contribute to fatty liver disease. By eliminating these cells in mice, the team reversed liver damage and reduced body weight, even on an unhealthy diet. The findings, published in Nature Aging, suggest similar mechanisms may drive human liver conditions.

Swedish team restores blood sugar control in diabetic mice

7 مايو، 2026 من إعداد الذكاء الاصطناعي

Researchers in Sweden have created insulin-producing cells from human stem cells that reversed diabetes symptoms when transplanted into mice. The cells matured after placement in the eye and maintained glucose regulation for months. The work was published in Stem Cell Reports.

صحة

McGill researchers use reversible drug approach to boost natural killer cells against hard-to-treat cancers

صحة

Cryo-expansion microscopy captures 3D architecture of killer T cells at the immune synapse, including in human tumors

علم

DNA study supports human arrival in Australia 60,000 years ago

Ancient DNA uncovers population replacement near Paris around 3000 BC

Genetic analysis of remains from a megalithic tomb near Bury, 50 kilometers north of Paris, reveals a complete population turnover around 3000 BC. The earlier group shared genetics with northern European farmers, while newcomers arrived from southern France and the Iberian Peninsula. Researchers link the shift to disease, environmental stress, and social changes.

Ancient DNA reveals Neanderthal group in Polish cave

22 أبريل، 2026 من إعداد الذكاء الاصطناعي

Researchers have analyzed mitochondrial DNA from eight Neanderthal teeth found in Stajnia Cave in Poland, reconstructing the genetic profile of a small group that lived there around 100,000 years ago. The study, published in Current Biology, marks the first such multi-individual genetic picture from a single site north of the Carpathians. The findings show genetic links to Neanderthals across Europe and the Caucasus.

14 مايو 2026 07:49

دراسة تربط خلايا الدم البشرية بأسلاف عاشت قبل 700 مليون عام

مقالات ذات صلة

Review argues some “senescent” cells can support tissue repair, complicating anti-aging strategies

UCLA scientists reverse liver damage in mice by removing zombie cells

Swedish team restores blood sugar control in diabetic mice

McGill researchers use reversible drug approach to boost natural killer cells against hard-to-treat cancers

Cryo-expansion microscopy captures 3D architecture of killer T cells at the immune synapse, including in human tumors

DNA study supports human arrival in Australia 60,000 years ago

Ancient DNA uncovers population replacement near Paris around 3000 BC

Ancient DNA reveals Neanderthal group in Polish cave

DNA study uncovers third ancestral group in Japanese population

Brazil fossil reanalysis challenges early animal origins

Study links monocyte “biological aging” in blood to emotional depression symptoms in women with and without HIV

Scientists begin unlocking nanoscale immune system secrets

Researchers create 'zombie' cells from dead bacteria

يستخدم هذا الموقع ملفات تعريف الارتباط