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 什么是核苷酸?

The Power of Nucleotides: A Simple Introduction

 
8 days ago228 view(s)
The Power of Nucleotides: A Simple Introduction

Every day we engage in a world of communication, maintaining connections with colleagues, family, and friends. Communication goes beyond external connections—within our bodies, complex systems are at work, coordinating signals to ensure every cell functions properly and our internal balance is maintained.

Just like a computer encodes data to transmit the right message, our bodies use deoxyribonucleic acid (DNA) to encode instructions, which are then relayed by ribonucleic acid (RNA) as the messenger to ensure the correct expression of genetic information.1


Understanding the Basics of DNA and RNA

DNA and RNA are made from the same fundamental units, known as nucleotides. Think of these as the "letters" in a unique alphabet with only four characters. Understanding these four bases is like learning a new language, but one that’s surprisingly simple and essential to all life. These basic building blocks are not only fundamental to life but are also easily accessible to us nutritionally.1 In fact, for many years, scientists doubted DNA could hold the key to genetics because its structure seemed too simple to explain the complexity of genetic variation. It wasn’t until 1944 that researchers recognized DNA as the true carrier of genetic information.2

The four letters of the DNA alphabet—A, C, G, and T—stand for adenine, cytosine, guanine, and thymine, the four nucleotides that make up our genetic code. RNA operates similarly to DNA, using just four "letters" to encode information. It shares three of DNA’s four bases—A, C, and G—but substitutes thymine (T) with its own unique base, uracil (U), creating a code of A, C, G, and U.1

 

 

DNA or RNA: How Are They Different?

Almost every cell in your body contains the same DNA, but it's the RNA sequence that gives each cell its distinct identity. The body relies on DNA as the "blueprint" designer, while RNA is in charge of making sure the correct proteins get built according to the design. Both are essential for life, but they have unique roles in the cell’s processes.1,3

Imagine DNA is like the blueprint for building a house—it has all the plans for every part of the house. RNA manages the blueprints, makes a list of materials, and tells everyone exactly what to do – this is called transcription. Each room in the house represents a different protein, the completed pieces we can see and put to use.


The Power of RNA and Protein Production

RNA's ability to guide protein production in your body is a key factor in maintaining your health.4 This is an incredibly powerful idea, with wide-reaching implications for how your body operates or where it might face challenges. By adjusting RNA levels, you can precisely influence the amount of any protein in the body, with remarkable accuracy.1,4 This RNA-modification process is a natural regulatory mechanism that occurs in the body.

RNA wasn’t always thought to be an essential nutrient. It was thought that the body could make enough of the RNA building blocks (nucleotides), needed to create new DNA or RNA. But making just one adenine (the “A” nucleotide base) is a multi-step process, showing just how much energy is required to produce each base! 5


From Genes to Wellness: How Nucleotides Fuel the Body

Nucleotides aren’t just essential for building genetic material—they also offer health benefits on their own. As DNA and RNA break down, they release nucleotides, which can then be repurposed for a variety of positive functions within the body.1

Since nucleotides and RNA are natural components of the human diet, the body is equipped with mechanisms to process, absorb, and incorporate these molecules into its tissues. These processes, which have been extensively studied, include facilitated diffusion, active transport, sodium-dependent cotransport, and tissue incorporation.6 As a result, RNA from food is easily absorbed through these familiar and efficient processes when digested.

While nucleotides and RNA are found in many foods, they may not be present in enough quantities when the body requires extra support. Increased need for RNA nucleotides is widely recognized in individuals recovering from surgery, trauma, burns, cancer, and pneumonia.7-9 However, research suggests that a greater demand for nucleotides extends to a much broader group. People with digestive issues, those needing to produce more cells to heal from injury, and those under significant emotional, physical, or structural stress may all need more nucleotides than what can be absorbed from food alone.10-15

When the body is not in optimal health, it turns to food and supplements for more of these essential building blocks, reducing the need to create each nucleotide base "from scratch" through an energy-consuming process. In these situations, more of the RNA from diet or supplements is absorbed and transported to tissues where it’s turned into functional RNA strands for use in those specific areas.16 The nucleotide bases (A, G, C, and U) absorbed from food and supplements help restore balance in the body during times of stress, rapid growth, or limited food resources.17


So, What Exactly Is a Nucleotide Blend?

Nucleotide Blends are a mixture of nucleotides from RNA, designed with a focus on various aspects of health and wellness. The specific combinations used in these blends are proprietary, but they all consist of the same basic nucleotides—A, C, G, and U—in different proportions.

Want to learn even more about nucleotides? Check out Dr. Amy’s free guidebook and explore the full line of Nucleotide Blends.


The information expressed on this webpage does not constitute an attempt to practice medicine nor does it establish a doctor-patient relationship. Content on the site is for informational and educational purposes only. The information expressed is not meant to replace you working with a physician or health care practitioner.

Information and statements have not been evaluated by the U.S. Food & Drug Administration (FDA) and are not intended to diagnose, treat, cure or prevent any disease or be used as the basis for treating a particular symptom or disease. Any products discussed or endorsed are not intended to diagnose, treat, cure or prevent any diseases or be used as the basis for treating a particular symptom or disease. If you have specific healthcare concerns or questions about the products displayed, contact your licensed healthcare professional for advice or answers.

 


REFERENCES:

1. Alberts B JA, Lewis J, et al. Molecular Biology of the Cell. 4th ed. From DNA to RNA. Garland Science; 2002.

2. Avery OT, Macleod CM, McCarty M. Studies on the chemical nature of the substance inducing transformation of Pneumococcal types : Induction of transformation by a Desoxyribonucleic Acid fraction isolated from Pneumococcus Type III. J Exp Med. Feb 01 1944;79(2):137-58. doi:10.1084/jem.79.2.137

3. Cenik C, Cenik ES, Byeon GW, et al. Integrative analysis of RNA, translation, and protein levels reveals distinct regulatory variation across humans. Genome Res. Nov 2015;25(11):1610-21. doi:10.1101/gr.193342.115

4. Qiu L, Jing Q, Li Y, Han J. RNA modification: mechanisms and therapeutic targets. Mol Biomed. Aug 24 2023;4(1):25. doi:10.1186/s43556-023-00139-x

5. Bera PP, Stein T, Head-Gordon M, Lee TJ. Mechanisms of the Formation of Adenine, Guanine, and Their Analogues in UV-Irradiated Mixed NH. Astrobiology. Aug 2017;17(8):771-785. doi:10.1089/ast.2016.1614

6. Norton R, Leite J, Vieira E, et al. Use of nucleotides in weanling rats with diarrhea induced by a lactose overload: effect on the evolution of diarrhea and weight and on the histopathology of intestine, liver and spleen. Braz J Med Biol Res. Feb 2001;34(2):195-202. doi:10.1590/s0100-879x2001000200006

7. O'Flaherty L, Bouchier-Hayes DJ. Immunonutrition and surgical practice. Proc Nutr Soc. Nov 1999;58(4):831-7. doi:10.1017/s0029665199001123

8. Braga M, Gianotti L, Radaelli G, et al. Perioperative immunonutrition in patients undergoing cancer surgery: results of a randomized double-blind phase 3 trial. Arch Surg. Apr 1999;134(4):428-33. doi:10.1001/archsurg.134.4.428

9. Bower RH, Cerra FB, Bershadsky B, et al. Early enteral administration of a formula (Impact) supplemented with arginine, nucleotides, and fish oil in intensive care unit patients: results of a multicenter, prospective, randomized, clinical trial. Crit Care Med. Mar 1995;23(3):436-49. doi:10.1097/00003246-199503000-00006

10. Uauy R, Quan R, Gil A. Role of nucleotides in intestinal development and repair: implications for infant nutrition. J Nutr. Aug 1994;124(8 Suppl):1436S-1441S. doi:10.1093/jn/124.suppl_8.1436S

11. Singhal A, Kennedy K, Lanigan J, et al. Dietary nucleotides and early growth in formula-fed infants: a randomized controlled trial. Pediatrics. Oct 2010;126(4):e946-53. doi:10.1542/peds.2009-2609

12. Palermo FA, Cardinaletti G, Cocci P, Tibaldi E, Polzonetti-Magni A, Mosconi G. Effects of dietary nucleotides on acute stress response and cannabinoid receptor 1 mRNAs in sole, Solea solea. Comp Biochem Physiol A Mol Integr Physiol. Mar 2013;164(3):477-82. doi:10.1016/j.cbpa.2012.12.005

13. Mc Naughton L, Bentley D, Koeppel P. The effects of a nucleotide supplement on the immune and metabolic response to short term, high intensity exercise performance in trained male subjects. J Sports Med Phys Fitness. Mar 2007;47(1):112-8.

14. Ostojic SM, Idrizovic K, Stojanovic MD. Sublingual nucleotides prolong run time to exhaustion in young physically active men. Nutrients. Nov 21 2013;5(11):4776-85. doi:10.3390/nu5114776

15. Ogita K, Suita S, Taguchi T, Yamanouchi T, Masumoto K, Nakao M. Roles of nucleosides and nucleotide mixture in small bowel transplantation. Nutrition. Apr 2002;18(4):338-42. doi:10.1016/s0899-9007(01)00744-4

16. Suchner U, Kuhn KS, Fürst P. The scientific basis of immunonutrition. Proc Nutr Soc. Nov 2000;59(4):553-63. doi:10.1017/s0029665100000793

17. PDR for Nutritional Supplements. 1st ed. Physicians' Desk Reference for Nutritional Supplement. Medical Economics Company; 2001.


核苷酸的力量:简明介绍

每天,我们都在与同事、家人和朋友进行交流。交流不仅限于外部的联系——在我们的体内,复杂的系统在协调信号,确保每个细胞正常运作并维持体内的平衡。就像计算机通过编码数据传递正确的信息一样,我们的身体通过脱氧核糖核酸(DNA)编码指令,然后由核糖核酸(RNA)作为信使,将这些信息传递,确保基因信息的正确表达。


理解DNA和RNA的基础
DNA和RNA由相同的基本单位——核苷酸组成。可以把这些核苷酸看作是一个独特字母表中的“字母”,这个字母表只有四个字符。理解这四个基础元素就像学习一门新语言,但它异常简单,并且对所有生命至关重要。这些基本的构建块不仅是生命的基础,而且在营养上也很容易获取。事实上,许多年前,科学家们曾怀疑DNA是否能承载遗传信息,因为它的结构看起来太简单,无法解释遗传变异的复杂性。直到1944年,研究人员才确认DNA是遗传信息的真正载体。

DNA字母表中的四个字母——A、C、G、T——分别代表腺嘌呤(Adenine)、胞嘧啶(Cytosine)、鸟嘌呤(Guanine)和胸腺嘧啶(Thymine),它们是构成我们遗传密码的四个核苷酸。RNA的工作原理与DNA类似,也使用四个“字母”来编码信息。它与DNA共享其中三个碱基——A、C和G——但将胸腺嘧啶(T)替换为自己独特的碱基——尿嘧啶(Uracil),因此RNA的编码字母为A、C、G和U。


DNA与RNA:它们有什么不同?
你体内几乎每个细胞都含有相同的DNA,但正是RNA序列赋予了每个细胞独特的身份。身体依赖DNA作为“蓝图”,而RNA则负责确保根据这些蓝图正确地构建蛋白质。两者对生命都至关重要,但它们在细胞过程中的角色各不相同。

可以想象,DNA就像是建造房屋的蓝图——它包含了房屋每一部分的设计图。而RNA则管理这些蓝图,列出所需的材料,并指挥每个人具体该做什么——这就是所谓的转录。房子的每个房间代表着不同的蛋白质,我们可以看到并利用这些蛋白质。

RNA和蛋白质合成的力量
RNA在指导体内蛋白质合成方面的作用是保持健康的关键因素。这是一个非常强大的概念,具有广泛的意义,影响着身体的运作或它可能面临的挑战。通过调整RNA水平,你可以精确地影响体内任何蛋白质的量,效果惊人地准确。这一RNA调控过程是身体的一种自然机制。

RNA并非一直被认为是一种必需的营养物质。曾有人认为,身体可以制造足够的RNA构建块(核苷酸)来合成新的DNA或RNA。但实际上,制造一个腺嘌呤(即“A”核苷酸)是一个多步骤过程,显示了生产每一个碱基所需的巨大能量。


从基因到健康:核苷酸如何为身体提供能量
核苷酸不仅是构建遗传物质的基础,它们本身也提供健康益处。当DNA和RNA分解时,它们会释放出核苷酸,这些核苷酸可以被重新利用,发挥多种积极作用。

由于核苷酸和RNA是人体饮食中的天然成分,身体具备了处理、吸收并将这些分子融入组织的机制。这些机制包括促进性扩散、主动运输、钠依赖性共同运输和组织吸收。结果,食物中的RNA在消化过程中通过这些熟悉且高效的过程被轻松吸收。

尽管核苷酸和RNA存在于许多食物中,但在身体需要额外支持时,它们可能无法提供足够的量。许多研究表明,术后、创伤、烧伤、癌症和肺炎等患者,往往需要更多的RNA核苷酸。然而,研究还表明,对核苷酸的需求不仅限于这些群体。患有消化问题、需要更多细胞修复的病人以及承受重大情绪、身体或结构性压力的人,可能都需要比食物能提供的更多核苷酸。

当身体健康状况不理想时,它会依赖食物和补充剂来获得更多这些必需的构建块,减少通过消耗大量能量“从零开始”制造每个核苷酸碱基的需要。在这些情况下,饮食或补充剂中的RNA会被吸收并运输到特定的组织中,转化为功能性的RNA链,供这些特定部位使用。通过食物和补充剂吸收的核苷酸碱基(A、G、C和U)有助于在压力、快速生长或食物资源有限时恢复身体平衡。


什么是核苷酸混合物?
核苷酸混合物是由RNA中的核苷酸组成的混合物,旨在促进各种健康和保健方面的作用。这些混合物的具体组合是专有的,但它们都由相同的基础核苷酸——A、C、G和U——按不同的比例组成。

想了解更多关于核苷酸的信息吗?查看Amy博士的免费指南,探索完整的核苷酸混合物系列。


免责声明:

本网页中的信息不构成医疗实践,也不建立医患关系。网站上的内容仅用于信息和教育目的,不能替代你与医生或医疗从业人员的沟通。所表达的信息并不意味着替代医生的诊疗建议。网站上的任何内容都未经过美国食品和药物管理局(FDA)的评估,且不旨在诊断、治疗、治愈或预防任何疾病,也不应作为治疗特定症状或疾病的依据。如有具体健康问题或产品疑问,请咨询你的执业医疗专业人员。


参考文献:
1. Alberts B JA, Lewis J, 等人. 《细胞的分子生物学》. 第4版. 从DNA到RNA. Garland Science; 2002。
2. Avery OT,Macleod CM,McCarty M. 诱导肺炎球菌型转化的物质化学性质研究:从肺炎球菌III型分离出的脱氧核糖核酸片段诱导转化。实验医学杂志。1944年2月1日;79(2):137-58。doi:10.1084/jem.79.2.137
3. Cenik C,Cenik ES,Byeon GW等。RNA、翻译和蛋白质水平的综合分析揭示了人类之间明显的调控差异。《基因组研究》。2015年11月;25(11):1610-21。doi:10.1101/gr.193342.115
4. 邱丽,景琦,李颖,韩佳. RNA修饰:机制和治疗靶点. 分子生物医学. 2023年8月24日;4(1):25. doi:10.1186/s43556-023-00139-x
5. Bera PP,Stein T,Head-Gordon M,Lee TJ. 紫外线照射下混合NH中腺嘌呤、鸟嘌呤及其类似物的形成机制。天体生物学。2017年8月;17(8):771-785。doi:10.1089/ast.2016.1614
6. Norton R, Leite J, Vieira E, 等人. 乳糖负荷过重引起的断奶大鼠腹泻中核苷酸的使用:对腹泻发展、体重以及肠道、肝脏和脾脏组织病理学的影响。《巴西医学与生物研究杂志》,2001年2月;34(2):195-202。doi:10.1590/s0100-879x2001000200006
7. O'Flaherty L,Bouchier-Hayes DJ. 免疫营养与外科实践. 营养学会会议记录. 1999年11月;58(4):831-7. doi:10.1017/s0029665199001123
8. Braga M,Gianotti L,Radaelli G等。接受癌症手术患者的围手术期免疫营养:一项随机双盲3期试验的结果。《外科档案》。1999年4月;134(4):428-33。doi:10.1001/archsurg.134.4.428
9. Bower RH, Cerra FB, Bershadsky B, 等人。重症监护单元患者早期肠内给予补充了精氨酸、核苷酸和鱼油的配方(Impact):一项多中心、前瞻性、随机临床试验的结果。《重症监护医学杂志》。1995年3月;23(3):436-49。doi:10.1097/00003246-199503000-00006
10. Uauy R, Quan R, Gil A. 核苷酸在肠道发育和修复中的作用:对婴儿营养的影响。《营养学杂志》。1994年8月;124(8增刊):1436S-1441S。doi:10.1093/jn/124.suppl_8.1436S
11. Singhal A,Kennedy K,Lanigan J等. 膳食核苷酸与配方奶粉喂养婴儿的早期生长:一项随机对照试验. 儿科学. 2010年10月;126(4):e946-53. doi:10.1542/peds.2009-2609
12. Palermo FA,Cardinaletti G,Cocci P,Tibaldi E,Polzonetti-Magni A,Mosconi G. 饮食中的核苷酸对鲽鱼(Solea solea)急性应激反应和大麻素受体1 mRNA的影响。Comp Biochem Physiol A Mol Integr Physiol。2013年3月;164(3):477-82。doi:10.1016/j.cbpa.2012.12.005
13. Mc Naughton L,Bentley D,Koeppel P. 核苷酸补充剂对经过训练的男性受试者短期高强度运动表现的免疫和代谢反应的影响。《体育医学与体质杂志》。2007年3月;47(1):112-8。
14. Ostojic SM,Idrizovic K,Stojanovic MD. 舌下含服核苷酸可延长年轻体力活动男性的运动至疲劳时间。营养素。2013年11月21日;5(11):4776-85。doi:10.3390/nu5114776
15. Ogita K, Suita S, Taguchi T, Yamanouchi T, Masumoto K, Nakao M. 核苷和核苷酸混合物在小肠移植中的作用。营养。2002年4月;18(4):338-42。doi:10.1016/s0899-9007(01)00744-4
16. Suchner U,Kuhn KS,Fürst P. 免疫营养的科学基础. 营养学会会议记录. 2000年11月;59(4):553-63. doi:10.1017/s0029665100000793
17. 《营养补充剂医师案头参考》(PDR for Nutritional Supplements),第1版。《营养补充剂医师案头参考》,医学经济学公司;2001年。

发布日期:2024/11/26 15:06:00
 
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