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Post #4730 104
死亡蛋白可能是减缓衰老的关键
科学家们发现一种与细胞死亡相关的蛋白质在血液干细胞的衰老过程中起着完全不同的作用。它不仅杀死细胞,还损害其线粒体,从而耗竭其能量并逐渐削弱免疫系统。将这种蛋白质关闭后,干细胞在压力下仍保持强壮和平衡。研究结果指向了一种减缓衰…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-17 10:58 GMT+8(北京时间)
#衰老 #干细胞 #线粒体
ScienceDaily A “death” protein may be the key to slowing aging at its source Scientists have discovered that a protein linked to cell death is secretly driving the aging of blood stem cells in a completely different way. Instead of killing the cells, it damages their mitochondria, sapping their energy and weakening the immune system…
Post #4729 97
科学家通过超级增强免疫细胞来更有效地摧毁癌症
研究人员发现了一种方法来使癌症杀伤免疫细胞更强大和精确。通过添加特定的信号组件,他们提高了细胞攻击肿瘤的准备程度。令人惊讶的是,短暂地用药物抑制细胞使用后,后来它们变得更加有效。这种方法可能有助于创造出更安全、更强大的下一代…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-17 11:28 GMT+8(北京时间)
#癌症 #免疫细胞 #癌症治疗
ScienceDaily Scientists supercharge immune cells to destroy cancer more effectively Researchers have found a way to make cancer-killing immune cells more powerful and precise. By adding specific signaling components, they boosted the cells’ readiness to attack tumors. Surprisingly, briefly suppressing the cells with a drug before use made…
Post #4728 118
科学家发现可以逆转肥胖的自然激素
科学家们发现了一种称为FGF21的激素,它可以通过激活新发现的代谢相关脑回路来逆转肥胖。令人惊讶的是,它通过一种完全不同的机制在脑的后部区域发挥作用,而不是抑制食欲,FGF21实际上是加速身体的能量燃烧。这种发现可能会为更准确的减肥…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-17 11:49 GMT+8(北京时间)
#FGF21 #代谢 #肥胖 #激素 #脑回路
ScienceDaily Scientists discover natural hormone that reverses obesity A hormone called FGF21 can reverse obesity in mice by activating a newly identified brain circuit tied to metabolism. Surprisingly, it works in the hindbrain—the same region targeted by GLP-1 drugs like Ozempic and Wegovy—but through a completely different…
Post #4727 127
日本近亲系线粒体引起的三例致命产前鸭嘴鹦鹉病例
日本研究人员报告了三例因Chlamydia psittaci引起的致命产前鸭嘴鹦鹉病例,这些病例的病原体属于紧密相关的系谱。
来源: CDC | 阅读全文
发布时间: 2026-04-16 12:00 GMT+8(北京时间)
#Chlamydiapsittaci #鸭嘴鹦鹉病 #产前感染 #日本
Emerging Infectious Diseases journal Three Fatal Gestational Psittacosis Cases Caused by <em>Chlamydia psittaci</em> Strains Belonging to Closely Related Lineages,… Fatal Gestational Psittacosis Cases, Japan
Post #4726 132
近20万人参与的研究揭示心脏健康的真正关键
近20万名成年人的长期研究挑战了低碳水化合物与低脂肪饮食的争论,研究发现,无论是低碳水化合物还是低脂肪饮食,如果注重全谷物、植物性食物和健康脂肪,均能降低心血管疾病的风险,反之,富含精制碳水化合物和动物脂肪的版本则会增加风险。质…
来源: ScienceDaily | 阅读全文
发布时间: 2026-02-17 13:29 GMT+8(北京时间)
#心脏健康 #低碳水化合物 #低脂肪饮食 #饮食研究
ScienceDaily Nearly 200,000 people reveal the real key to heart health A decades-long study of nearly 200,000 adults challenges the low-carb versus low-fat debate. Both eating patterns were tied to lower heart disease risk when they emphasized whole grains, plant-based foods, and healthy fats. Versions filled with refined carbs…
Post #4725 82
科学家们移除“僵尸”细胞并逆转小鼠肝脏损伤
研究人员发现,随着年龄的增长和胆固醇水平的升高,“僵尸”免疫细胞会积累,并在老年小鼠中占据肝脏的免疫细胞的大部分。科学家们移除这些细胞后,肝脏损伤得到显著逆转,甚至不需要改变饮食。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 19:59 GMT+8(北京时间)
#僵尸细胞 #免疫细胞 #肝脏损伤
ScienceDaily Scientists remove “zombie” cells and reverse liver damage in mice A rogue set of “zombie” immune cells may be driving aging and fatty liver disease by flooding tissues with inflammation. Researchers found these cells accumulate with age and high cholesterol—and can make up most of the liver’s immune cells in older mice.…
Post #4724 73
科学家发现脑部switch清除阿尔茨海默病斑块的关键点
研究人员找到了两种脑部受体,它们帮助脑部清除阿尔茨海默病的标志物之一——β-淀粉样蛋白。通过激活这些受体,科学家在小鼠身上增加了天然β-淀粉样蛋白分解酶的水平,减少了脑部积累,改善了与记忆相关的行为。由于这些受体是常见的药物靶点,…
来源: ScienceDaily | 阅读全文
发布时间: 2026-02-17 18:30 GMT+8(北京时间)
#阿尔茨海默病 #脑部受体 #β淀粉样蛋白 #药物治疗
ScienceDaily Scientists discover brain switches that clear Alzheimer’s plaques Researchers have identified two brain receptors that help the brain clear away amyloid beta, a hallmark of Alzheimer’s disease. By stimulating these receptors in mice, scientists increased levels of a natural amyloid-breaking enzyme, reduced buildup in the…
Post #4723 62
AI识别皮肤癌早期风险模式
一项大型瑞典研究表明,AI可以使用常规健康数据识别皮肤癌高风险人群。高级模型显著超越基本方法,准确识别高风险群体。某些被系统标记的人群在五年内患皮肤癌的概率高达33%。这种方法可能为更智能、更精准的筛查开辟了道路。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 16:36 GMT+8(北京时间)
#AI #皮肤癌 #早期风险 #瑞典研究
ScienceDaily AI identifies early risk patterns for skin cancer A massive Swedish study shows that AI can spot people at higher risk of melanoma using routine health data. Advanced models significantly outperformed basic methods, identifying high-risk groups with striking accuracy. Some individuals flagged by the system…
Post #4722 68
科学家发现脑部修复基因
科学家发现高海拔动物如羊和藏羚的基因突变可以帮助它们在低氧环境中生存,研究人员发现这种基因突变也可以保护和修复神经纤维的髓鞘,这种髓鞘在多发性硬化症(MS)和脑瘫中受损。这种发现可能会重塑我们对神经损伤的治疗方法。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 16:36 GMT+8(北京时间)
#神经损伤 #髓鞘 #基因突变 #多发性硬化症
ScienceDaily Scientists discover gene that helps the brain repair itself A surprising discovery from high-altitude animals like yaks and Tibetan antelopes could reshape how we treat nerve damage in humans. Scientists found that a genetic mutation helping these animals survive low-oxygen environments also protects and repairs the…
Post #4721 79
科学家认为这是一个年轻的T. rex。他们错了
科学家分析了来自原始化石的颈骨,发现了成长模式,表明该动物已经成熟,而不是一个即将成长的巨型。这个较小的捕食者——约为成年T. rex的半大小——很可能与其著名的同类共存,增加了古代生态系统的复杂性。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 11:05 GMT+8(北京时间)
#Nanotyrannus #Trex #化石 #古生物学
ScienceDaily Scientists thought this was a young T. rex. They were wrong A long-running dinosaur mystery may finally be solved: Nanotyrannus, once dismissed as just a teenage T. rex, appears to have been its own distinct species after all. Scientists analyzed a tiny throat bone from the original fossil and discovered growth patterns…
Post #4720 95
这款便宜药物可能有助于1型糖尿病患者减少使用胰岛素
一项令人惊讶的临床试验显示,用于治疗2型糖尿病的便宜药物甲苯磺酰胺可能在意想不到的方式帮助1型糖尿病患者。研究人员最初希望它可以降低胰岛素抵抗,但他们发现它使患者在保持血糖稳定水平的同时可以减少约12%的胰岛素使用量。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 11:50 GMT+8(北京时间)
#甲苯磺酰胺 #1型糖尿病 #胰岛素 #临床试验
ScienceDaily This cheap drug could help people with type 1 diabetes use less insulin A surprising new clinical trial has revealed that metformin—a cheap, century-old drug widely used for type 2 diabetes—may help people with type 1 diabetes in an unexpected way. While researchers initially hoped it would reduce insulin resistance, they instead…
Post #4719 75
血压应该低至多少?科学家有答案
新研究表明,目标血压值低于120毫米汞柱可能比之前预期的更大地降低心脏健康风险。通过使用大型数据集和模拟模型,科学家发现,保持收缩压低于120毫米汞柱可以比更高的目标值更有效地降低心脏病发作、中风和心力衰竭的风险。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 14:56 GMT+8(北京时间)
#血压 #心脏健康 #心脏病
ScienceDaily How low should blood pressure go? Science has the answer New research suggests that aiming for a lower blood pressure target may deliver bigger heart health benefits than previously thought. Using large datasets and simulation models, scientists found that keeping systolic blood pressure below 120 mm Hg could reduce…
Post #4718 76
科学家发现海洋中新型甲烷来源,可能加剧全球变暖
科学家们发现,微生物在营养物质贫乏的条件下产生甲烷,解决了长期的谜团。随着海洋温度升高,营养物质混合减少,这些甲烷产生的微生物可能会繁荣。这种情况可能导致海洋甲烷排放增加,形成一个可能加剧气候变化的反馈循环。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 16:34 GMT+8(北京时间)
#甲烷 #微生物 #海洋 #气候变化
ScienceDaily Scientists discover hidden ocean methane source that could worsen global warming Scientists have discovered that methane in the open ocean is produced by microbes under nutrient-poor conditions, solving a long-standing mystery. As warming oceans reduce nutrient mixing, these methane-producing microbes may thrive. This could lead to increased…
Post #4717 91
常见IBS药物与死亡风险升高
近20年来,追踪超过650,000名美国有慢性胃肠不适症(IBS)的人群的研究揭示了某些常用药物,包括抗抑郁药和某些抗腹泻药,可能会在长期内增加死亡风险。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-16 17:19 GMT+8(北京时间)
#IBS #抗抑郁药 #抗腹泻药 #死亡风险
ScienceDaily Common IBS medications linked to higher risk of death in major study A massive, nearly 20-year study tracking over 650,000 Americans with irritable bowel syndrome is raising new questions about the long-term safety of common treatments. Researchers found that some widely used medications—including antidepressants and certain…
Post #4716 94
高病毒性禽流感A(H5N1)病毒RNA在美国加利福尼亚州的牛精液中发现,2024年
研究人员在美国加利福尼亚州发现了高病毒性禽流感A(H5N1)病毒的RNA存在于牛精液中,这一发现引发了人们对该病毒在牛群中的传播风险的担忧。该研究使用了PCR技术检测了来自加利福尼亚州的牛精液样本,结果显示约有1/3的样本中检测到了H5…
来源: CDC | 阅读全文
发布时间: 2026-04-15 12:00 GMT+8(北京时间)
#禽流感 #H5N1 #牛精液 #传播风险 #PCR检测
Emerging Infectious Diseases journal Highly Pathogenic Avian Influenza A(H5N1) Virus RNA in Bovine Semen, California, USA, 2024
Post #4715 101
Scientists think alien life might be hiding in patterns
A new study proposes detecting life in space by spotting patterns across many planets instead of focusing on one at a time. If life spreads and changes planetary envi…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 20:17 GMT+8(北京时间)
ScienceDaily Scientists think alien life might be hiding in patterns A new study proposes detecting life in space by spotting patterns across many planets instead of focusing on one at a time. If life spreads and changes planetary environments, it could leave behind statistical clues linking planets together. These patterns…
Post #4714 161
你为什么在某些天会如此高效,而不是其他天?
研究人员发现,当人们在某一天思维清晰时,他们更容易设定更大的目标并且能够实现。这种优势可以让人在一天中多出40分钟的效率。然而,如果过度努力过长时间,这种优势反而会消失。
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 20:44 GMT+8(北京时间)
#效率 #思维清晰 #目标设定
ScienceDaily The surprising reason you’re so productive one day and not the next Feeling mentally “on” isn’t just in your head—it can significantly boost what you accomplish. Researchers found that sharper thinking on a given day leads people to set bigger goals and actually follow through. That edge can equal up to 40 extra minutes of…
Post #4713 141
这条长31英尺的‘恐怖鳄’曾经吃掉了恐龙,现在它回来了
科学家们通过首个科学准确的全骨骼复制品,重现了超过75百万年前曾在美国东南部统治的恐龙顶级掠食者——巨型恐鳄(Deinosuchus schwimmeri)。这条长达30英尺的古巨兽曾经以恐龙为食,现已在Tellus科学博物馆展出,全球唯一一处展出此复…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 21:23 GMT+8(北京时间)
#恐鳄 #Deinosuchusschwimmeri #恐龙 #Tellus科学博物馆
ScienceDaily This 31-foot “terror croc” ate dinosaurs. Now it’s back A massive, bus-sized “terror croc” that once preyed on dinosaurs has been brought back to life in stunning detail with the first scientifically accurate full skeleton of Deinosuchus schwimmeri. Stretching over 30 feet long, this ancient apex predator ruled…
Post #4712 73
一具被压碎的化石揭示了一个不应该存在的恐龙
一具被损坏的恐龙头骨,曾被遗忘在一个抽屉里,后来被一名弗吉尼亚理工大学的学生重建,揭示了早期肉食性恐龙的新物种,具有前所未见的奇特特征。化石表明,在三叠纪末的灭绝事件中,不仅是竞争对手才被灭绝,某些恐龙群也被灭绝。它可能是古老…
来源: ScienceDaily | 阅读全文
发布时间: 2026-04-15 21:31 GMT+8(北京时间)
#恐龙 #化石 #弗吉尼亚理工大学 #三叠纪末灭绝事件
ScienceDaily A crushed fossil revealed a dinosaur that shouldn’t have existed A badly mangled dinosaur skull, once forgotten in a drawer, turned out to be a rare and important discovery. Reconstructed by a Virginia Tech student, it revealed a new species of early carnivorous dinosaur with unusual features never seen before. The fossil…
Post #4711 82
苏丹面临更深层次的健康危机
苏丹三年来的冲突导致了全球最大的人道主义和流离失所危机,冲突地区的人民面临着健康的严重后果。虽然某些州的局势正在改善,但战斗仍在继续的地区,健康危机却在加深。疾病爆发和营养不良在增加,医疗服务的接触在减少,资金不足。需要人道主…
来源: WHO | 阅读全文
发布时间: 2026-04-15 00:02 GMT+8(北京时间)
#苏丹 #人道主义危机 #健康危机 #营养不良 #医疗服务
World Health Organization After three years of conflict, Sudan faces a deeper health crisis Three years of war in Sudan have created the world’s largest humanitarian and displacement crisis, with devastating consequences for people’s health.
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