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.

Study finds blood-cancer-linked mutations in brain immune cells tied to Alzheimer’s pathology

12 يونيو، 2026 من إعداد الذكاء الاصطناعي صورة مولدة بواسطة الذكاء الاصطناعي تم التحقق من الحقائق

Researchers at Boston Children’s Hospital report that mutations commonly associated with clonal blood-cell expansion and some blood cancers were enriched in microglia-like immune cells in Alzheimer’s brains and were also detectable in matched blood samples. The Cell study proposes that age- or injury-related weakening of the blood-brain barrier could allow mutated blood immune cells to enter the brain, potentially amplifying inflammation and contributing to neurodegeneration.

USC scientists create renewable supply of cancer-fighting cells

Researchers at USC Stem Cell have developed a method to produce large numbers of immune cell precursors that can be engineered to target cancer. The approach, published in the journal Cell, uses granulocyte-monocyte progenitors that self-renew in the laboratory.

Researchers propose lineage model for brain development

25 يونيو، 2026 من إعداد الذكاء الاصطناعي

A new theory from scientists at Cold Spring Harbor Laboratory suggests that brain cells use their cellular family tree to organize into a complex organ. The model explains how a single starting cell can form a brain with roughly 170 billion precisely positioned neurons.

Health

Scientists begin unlocking nanoscale immune system secrets

Health

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

Science

Team creates prototype synthetic cell with 36 genes

DNA study uncovers third ancestral group in Japanese population

A large-scale genetic analysis has identified a previously overlooked third ancestral group in Japan, challenging the long-held dual origins theory. Researchers linked the new ancestry to the ancient Emishi people of northeastern Japan. The findings also connect archaic DNA from Neanderthals and Denisovans to modern health conditions.

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

25 مايو، 2026 من إعداد الذكاء الاصطناعي تم التحقق من الحقائق

Researchers at McGill University report a drug-based method to temporarily enhance natural killer (NK) cells—an immune cell type—by inhibiting two proteins, improving the cells’ ability to attack several aggressive cancers in preclinical experiments.

26 يونيو 2026 03:15

دراسة تربط خلايا الدم البشرية بأسلاف عاشت قبل 700 مليون عام

مقالات ذات صلة

Study finds blood-cancer-linked mutations in brain immune cells tied to Alzheimer’s pathology

USC scientists create renewable supply of cancer-fighting cells

Researchers propose lineage model for brain development

Scientists begin unlocking nanoscale immune system secrets

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

Team creates prototype synthetic cell with 36 genes

DNA study uncovers third ancestral group in Japanese population

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

Ancient human DNA found on cave art for first time

Scientists identify “footprints of death” that can aid immune cleanup—and may be exploited by influenza

Ancient Denisovan DNA still shapes human immunity today

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

Brazil fossil reanalysis challenges early animal origins

Swedish team restores blood sugar control in diabetic mice

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

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