喵咖播客

喵咖播客

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喵咖播客 episodes

  • Human tissue, new questions | Episode 322 (English)
    The redesigned hosts each made room for four human cortical organoids. The grafts formed extensive human-derived cortical tissue and showed neural activity, and the model let researchers track tissue responses alongside specific gait changes after low oxygen.
    10 min
  • A Spider Hanging at Midnight | Episode 321 (English)
    English audio edition of Meowcast Episode 321.
    A jumping spider hangs from a silk thread at night, twitching. Is it dreaming? Miaoka and Xiaobai explore behavioral evidence for sleep, a recurring REM-like state, and the limits of what these experiments can tell us. Sleep-like behavior is evidence; dreaming remains unproven.
    Sources:
    Behavioral evidence for two-stage sleep in spiders: https://pubmed.ncbi.nlm.nih.gov/42932628/
    Regularly occurring bouts of retinal movements suggest an REM sleep-like state in jumping spiders: https://pmc.ncbi.nlm.nih.gov/articles/PMC9388130/
    Hanging by a thread: unusual nocturnal resting behaviour in a jumping spider: https://doi.org/10.1186/s12983-021-00410-3
    Produced with AI-generated voices. For science communication and general information.
    11 min
  • 少配一瓶试剂,却为几十年后的抗癌药打开大门 第320期
    ## 一句话总结
    “少配了一瓶试剂”背后,一瓶没被扔掉的旧缓冲液、一个被骂"钓鱼"的样本库、首版失败后补做的第八个版本,共同拼出了抗癌药赫赛汀近二十年的来路。
    ## 核心要点
    1. 1979年Hunter因一瓶旧缓冲液意外发现酪氨酸磷酸化,新配试剂一度重复不出,他查明是老化改变了酸碱度,1980年发表这一基础发现。
    2. 1987年Slamon依托肿瘤组织库,在189份乳腺癌样本中发现约3成存在HER2扩增且结局更差,而该受体的胞内段正是酪氨酸激酶。
    3. 1992年Carter团队人源化抗体首版"能结合、没功能",再设计7个版本后第8个成功,成为1998年获批的赫赛汀的底子。
    ## 引用文献
    - Transforming gene product of Rous sarcoma virus phosphorylates tyrosine — https://pubmed.ncbi.nlm.nih.gov/6246487/
    - Human breast cancer: correlation of relapse and survival with amplification of the HER-2/neu oncogene — https://pubmed.ncbi.nlm.nih.gov/3798106/
    - Humanization of an anti-p185HER2 antibody for human cancer therapy — https://pubmed.ncbi.nlm.nih.gov/1350088/
    - The genesis of tyrosine phosphorylation — https://pubmed.ncbi.nlm.nih.gov/24789824/
    - Targeting the function of the HER2 oncogene in human cancer therapeutics — https://pubmed.ncbi.nlm.nih.gov/17486079/
    - Where Cures Begin: Tony Hunter — https://www.salk.edu/salk-talk-podcast/episode-002-where-cures-begin-tony-hunter/
    - S02:The Culprit Is Cancer — https://newsroom.ucla.edu/magazine/cancer-dennis-slamon-herceptin-her-2
    - S03:Herceptin—a targeted antibody therapy for breast cancer — https://laskerfoundation.org/winners/herceptin-a-targeted-antibody-therapy-for-breast-cancer/
    - S04:Salk scientist Tony Hunter receives 2026 Albany Prize — https://www.salk.edu/news-release/salk-scientist-tony-hunter-receives-2026-albany-prize/
    ## 免责声明
    本文为科学故事分享,不构成任何医疗建议,具体诊疗请遵医嘱。
    13 min
  • 20年内FDA首次批准新防晒产品
    ## 一句话总结
    20年内FDA首次批准新防晒活性成分:BEMT在海外使用多年,却从2005年申请到2026年才获准,连喷罐结构都要逐项过审。
    ## 核心要点
    1. 2026年6月,FDA把BEMT加入美国非处方防晒专论,允许最高6%的浓度;这是FDA所称20年来首次新增防晒活性成分。
    2. BEMT并非刚出现的新化合物,相关美国申请可追溯到2005年;旧资料曾因安全性和有效性证据不足而未获接受,申请方后来沿新路径补交材料。
    3. 新的有效性证据按规定方法测试不同浓度配方,并以紫外线照射后皮肤出现红斑所需剂量计算SPF;符合要求的两项研究成为审评依据。
    4. 系统吸收研究纳入162名健康成年人,使用3种含6% BEMT的配方,每天涂4次、连续4天并采集血样;FDA综合人体、非临床及市场监测资料后认定规定条件下证据充分。
    5. 获准范围并不覆盖所有形态:部分泵式或推进剂与药液隔开的喷雾得到支持,推进剂直接接触药液的传统气雾剂因稳定性等资料不足未被纳入。
    ## 引用文献
    - FDA:FDA Expands Sunscreen Options for the First Time in 20 Years https://www.fda.gov/news-events/press-announcements/fda-expands-sunscreen-options-first-time-20-years
    ## 免责声明
    > 本文仅供科普信息参考,不构成医疗建议;产品是否上市、具体配方与使用方法请以监管文件和产品标签为准。
    0 min
  • 为什么止痛贴反而要先扎你一下?
    ## 一句话总结
    为什么止痛贴反而要先扎你一下?:TEAM贴片使用突出水凝胶约二百微米的柔性微针越过高阻抗角质层,并结合导电水凝胶形成表面并联电流路径,以降低界面阻抗和缓解针尖电流拥挤。
    ## 核心要点
    1. TEAM由多层材料构成,包括聚酰亚胺微针、钛金导电层、导电聚合物与聚氨酯中间层以及导电水凝胶,而不是一张单纯的金属贴纸。
    2. 系统能够调节刺激频率、幅度和脉宽,并通过自适应恒流设计应对皮肤及环境条件变化。
    3. 在4.7 mA、100 Hz双相刺激的100 个周期测试中,漏电流低于10 μA,论文据此提供了特定实验条件下的电路安全证据。
    4. 论文在动物疼痛模型中比较了TEAM与凝胶电极,并考察脊髓神经活动、Fos表达、皮肤组织学及炎症因子等指标。
    ## 引用文献
    - Wireless IoT-enabled microneedle electroceutical for personalized and connected pain management https://www.nature.com/articles/s41467-026-76527-y
    - Skin preparation-free, stretchable microneedle adhesive patches for reliable electrophysiological sensing and exoskeleton robot control https://pmc.ncbi.nlm.nih.gov/articles/PMC10793950/
    - A three-dimensional bipolar microneedle electrode array with local ground integrated at each sidewall for enhanced focal electric stimulation https://pmc.ncbi.nlm.nih.gov/articles/PMC12661015/
    - Wireless IoT-enabled microneedle electroceutical for personalized and connected pain management. https://pubmed.ncbi.nlm.nih.gov/42665587/
    - Progress in micro/nano sensors and nanoenergy for future AIoT-based smart home applications https://doi.org/10.1088/2632-959x/abf3d4
    - Advancements in Wearable and Implantable BioMEMS Devices: Transforming Healthcare Through Technology https://doi.org/10.3390/mi16050522
    ## 免责声明
    > 本文仅供科普信息参考,不构成法律、医疗、投资或平台规则建议;具体事项请以适用规则和专业意见为准。
    7 min

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读天书,说人话。喵咖播客用轻松对话聊科学、健康与技术,把论文、新闻和真实生活讲得更容易听懂。内容仅作科普交流,不构成医疗建议。