蛋白质

Search documents
蛋白质合成,探索生命起源之谜(国际科技前沿)
Ren Min Wang· 2025-09-25 22:53
Core Insights - A breakthrough study by a research team from University College London has successfully demonstrated the chemical connection between RNA and amino acids under prebiotic conditions without enzymes, addressing a long-standing question in the origin of life research [4][5][6] Group 1: Research Findings - The study provides new insights into how proteins are synthesized, which is crucial for understanding the origin of life [5][6] - The research indicates that amino acids can spontaneously connect to RNA in early Earth environments, suggesting a possible pathway for the emergence of life [6][9] - The team utilized a milder method involving thioesters to activate amino acids, allowing for selective connections to RNA, which is essential for functional stability in early life forms [7][8] Group 2: Theoretical Implications - The findings merge the "RNA world" and "thioester world" theories, proposing that life may not have a single origin point but rather a collaborative evolution of metabolic and genetic systems [8][9] - This research narrows the gap between chemical evolution and biological evolution, providing a plausible chemical basis for the transition from non-living to living systems [9][10] Group 3: Future Directions - The research team aims to explore how RNA sequences preferentially bind to specific amino acids, which is vital for understanding the origins of genetic coding [10][11] - The implications of this study extend to potential applications in artificial life systems, in situ protein synthesis, and targeted drug delivery [10][11] - Continued exploration of the chemical microenvironment within cells may offer new strategies for disease prevention and treatment [10][11]
科学家重现约40亿年前RNA与氨基酸的“第一次连接”—— 蛋白质合成,探索生命起源之谜(国际科技前沿)
Ren Min Ri Bao· 2025-09-25 22:02
Core Insights - A breakthrough study by a research team from University College London successfully demonstrated the chemical connection between RNA and amino acids under enzyme-free conditions, addressing a long-standing question in the origin of life research [1][3][4] - The research integrates the "RNA world" and "thioester world" theories, suggesting that the origin of life may not have a single starting point but rather a collaborative evolution of metabolic and genetic systems through simple chemical reactions [6][8] Molecular Evolution - The study falls within the realm of molecular evolution, focusing on the self-assembly and functional evolution of biological macromolecules like RNA and proteins, as well as the formation of "primitive cells" [2][6] - The research highlights the importance of understanding how RNA connects with amino acids, which is crucial for comprehending the mechanisms of protein synthesis and the origin of life [3][4] Methodology and Findings - The research team utilized thioesters to activate amino acids, allowing them to connect with RNA in a controlled manner, which was previously unattainable with high-energy molecules that would decompose in water [4][5] - The findings suggest that these reactions likely occurred in early Earth's lakes or small pools rather than in the ocean, providing a more specific direction for scientists searching for the "cradle" of life [5][6] Implications for Future Research - The study opens avenues for further exploration into how RNA sequences preferentially bind to specific amino acids, which is essential for understanding the origin of the genetic code [7][8] - The research may also contribute to the development of artificial life systems, in situ protein synthesis, and targeted drug delivery, highlighting its potential applications in biotechnology and medicine [7][8] Broader Impact - The findings could bridge the gap between chemical evolution and biological evolution, offering a reasonable chemical basis for the transition from non-living chemical substances to living biological systems [6][8] - The research emphasizes the importance of the chemical microenvironment within cells, suggesting that imbalances may lead to molecular interactions abnormalities and metabolic disorders, which could inform new strategies for disease prevention [7][8]
Bio-Techne (NasdaqGS:TECH) FY Conference Transcript
2025-09-10 15:47
Bio-Techne FY Conference Summary Company Overview - **Company**: Bio-Techne (NasdaqGS: TECH) - **Industry**: Life Science Tools Key Points Company Positioning and Growth Strategy - Bio-Techne is a leader in reagents for life science research, focusing on proteins, antibodies, and assays for diagnostics and therapeutics [4][6] - The company has invested heavily in automation of protein analytics, spatial biology, and cell therapy, which now account for approximately 45% of revenue, up from 30% pre-COVID [6][7] - 90% of Bio-Techne's business is recurring, primarily from consumables, which supports sustainable growth [7] Recent Financial Performance - The company reported a 3% growth in the most recent quarter, with notable performance in China (10% growth) and continued double-digit growth in large pharma [9][10] - Challenges included delays in shipping high-priced instruments due to geopolitical issues [9] Academic Market Exposure - Academic sales account for about 20% of total revenue, with U.S. academia contributing approximately 11-12% [13][14] - Despite funding constraints, consumables have remained flat, indicating resilience in the product portfolio [14][15] Market Dynamics in China - Positive sentiment in China suggests a gradual ramp-up in growth, with expectations of returning to double-digit growth in the long term [18][19] Biopharma Market Insights - Biopharma constitutes roughly 50% of revenue, with large pharma showing strong recovery and growth, while biotech funding has decreased significantly [20][21] - The uncertainty in biotech funding may impact future spending, but recent improvements in funding could signal a recovery [22] Cell Therapy Business - Bio-Techne is well-positioned in the cell therapy market, focusing on GMP proteins, with a significant increase in revenue from this segment [23][24] - The company has built a strong reputation for quality and has a competitive edge in the regen med space, which has greater market potential than CAR-T therapies [25][26] Core Reagents and Instrumentation - The core reagents business remains stable, with healthy competition in the antibody market [30][31] - The ProteinSimple platform has shown resilience, with growth driven by increased usage of consumables despite a downturn in new instrument placements [34][36] Spatial Biology and Competitive Position - Bio-Techne leads in spatial biology with RNAscope reagents and the new COMET instrument, which automates RNA and protein detection [39][41] - The company is positioned to capitalize on the growing demand for translational research tools [40] Strategic Divestiture - The recent divestiture of the Exosome Diagnostics business was driven by a misalignment with Bio-Techne's core capabilities and a lack of a clear path to profitability [43][45] Revenue Outlook and Market Conditions - The company anticipates low single-digit growth, managing costs and investments amid market uncertainties [47][50] - Optimism remains regarding recovery in key markets, with expectations that administrative-induced noise will settle down [51][53] Conclusion Bio-Techne is strategically positioned for growth in the life science tools industry, with a strong focus on automation, spatial biology, and cell therapy. Despite current market challenges, the company maintains a positive outlook for future performance driven by its recurring revenue model and innovative product offerings.
哪些食物是“视力加油站”?营养专家帮你划重点
Yang Shi Wang· 2025-06-24 03:16
Core Viewpoint - The increasing prevalence of myopia among children is linked to factors such as screen exposure and insufficient outdoor activities, emphasizing the importance of nutrition during critical developmental periods for visual health [1] Group 1: Importance of Outdoor Activities and Nutrition - Children should engage in at least 2 hours of outdoor activities daily to prevent myopia [1] - Nutritional intake is crucial for preventing and improving visual impairments like amblyopia and myopia [1] Group 2: Key Nutritional Components for Eye Health - Protein is essential for visual development and should be sourced from lean meats, fish, dairy, and soy products [2] - Vitamin A is vital for normal growth of corneal and retinal cells, with sources including liver, carrots, and dark vegetables [3] - Vitamins C and E serve as antioxidants, protecting eye tissues from damage, found in citrus fruits, nuts, and leafy greens [4] - B vitamins support metabolic processes in the retina and cornea, primarily sourced from whole grains, meats, and dairy [5] - Calcium is necessary for maintaining the firmness of the eyeball, with dairy, legumes, and leafy greens as primary sources [6] - Trace elements like chromium, manganese, selenium, and zinc are crucial for visual function and development, found in seafood, nuts, and liver [7] Group 3: Dietary Recommendations for Eye Health - Lutein filters harmful blue light and is found in spinach, broccoli, and carrots [9] - DHA, an omega-3 fatty acid, enhances visual sensitivity and is best obtained from deep-sea fish [9] - A balanced diet is essential to prevent nutritional deficiencies that can lead to myopia, with recommendations for whole grains, fresh vegetables, and fruits [10]