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Updated 2026-01-16. Numbers and descriptions here follow the published literature rather than marketing material.
Nicotinamide mononucleotide, abbreviated NMN, is a nucleotide composed of nicotinamide, ribose, and phosphate. Its structure links nicotinamide to D-ribose 5-phosphate through a glycosidic bond, placing it in the pyridine nucleotide family. The compound exists in alpha and beta anomeric forms, and the beta form is the one used in NAD+ biosynthesis. NMN is not a protein or a hormone; it is a small water-soluble molecule that occurs in living cells as a metabolic intermediate.
Natural sources of NMN include mammals, plants, and microorganisms, where it functions as an intermediate in NAD+ salvage and biosynthesis pathways. In mammals, the enzyme nicotinamide phosphoribosyltransferase produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN is then converted to NAD+ by nicotinamide mononucleotide adenylyltransferase. Some foods contain measurable NMN, but reported amounts vary widely by species, tissue, and analytical method. The extent to which dietary NMN contributes to cellular NAD+ pools remains an open research question.
Identity and purity are usually assessed with complementary methods. Nuclear magnetic resonance spectroscopy can confirm the molecular structure and distinguish anomeric forms. High-performance liquid chromatography with ultraviolet detection or mass spectrometry is common for assay and related-substance testing. Mass spectrometry also supports trace quantification in biological samples, often with isotope-labeled internal standards. Because NMN lacks a strong chromophore, some ultraviolet methods require careful wavelength selection or derivatization, and laboratories may validate each approach for its intended matrix.
Commercial NMN is produced through enzymatic or chemical routes, and the resulting material can vary in purity, counterion, and residual solvent content. Buyers typically rely on certificates of analysis, but independent verification through third-party laboratories provides stronger assurance. Regulatory treatment differs by country; in the United States, NMN has been subject to shifting guidance about its status as a dietary supplement, while other markets permit sales under local rules. No universal pharmacopeial monograph exists for NMN, so specifications often come from suppliers, research protocols, or regional requirements.
Solid NMN is generally handled as a moisture-sensitive compound. Dry material stored desiccated at low temperature, protected from light, tends to remain stable for extended periods. Aqueous solutions are less stable and can undergo hydrolysis, especially at elevated temperature or alkaline pH. The anomeric form also matters: beta-NMN is the naturally occurring form, while alpha-NMN can appear as a synthetic impurity. Purity and storage conditions therefore influence both analytical results and experimental reproducibility.
| Property | Value | Notes |
|---|---|---|
| Common name | Nicotinamide mononucleotide | Often abbreviated NMN |
| Chemical formula | C11H15N2O8P | Beta anomer form |
| Molecular mass | 334.22 g/mol | Calculated from formula |
| CAS Registry Number | 1094-61-7 | Beta-NMN |
| Appearance | White to off-white powder | Typical laboratory grade |
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The emergence of Candida auris as a potential human pathogen that sometimes exhibits multi-class antifungal drug resistance is concerning and has been associated with several outbreaks. The WHO has released a priority fungal pathogen list, including pathogens with antifungal resistance. The identification of antifungal resistance is undermined by limited classical diagnosis of infection, where a culture is lacking, preventing susceptibility testing. National and international surveillance schemes for fungal disease and antifungal resistance are limited, hampering the understanding of the disease burden and associated resistance. The application of molecular testing to identify genetic markers associating with resistance may improve the identification of antifungal resistance, but the diversity of mutations associated with resistance is increasing across the fungal species causing infection. In addition, a number of resistance mechanisms depend on up-regulation of selected genes (for instance reflux pumps) rather than defined mutations that are amenable to molecular detection. Due to the limited number of antifungals in clinical use and the increasing global incidence of antifungal resistance, using the existing antifungals in combination might be beneficial in some cases but further research is needed. Similarly, other approaches that might help to combat the emergence of antifungal resistance could rely on the development of host-directed therapies such as immunotherapy or vaccines.
=== 2010s === The 2010s were defined by advances in precision genome editing and structural biology. In 2012, Jennifer Doudna and Emmanuelle Charpentier adapted the bacterial CRISPR-Cas9 defense system into a programmable gene-editing tool, revolutionizing genetic engineering and translational medicine. Additionally, immunotherapy emerged as a dominant paradigm in oncology, highlighted by the development and clinical approval of CAR-T cell therapies and immune checkpoint inhibitors.
Several methods have been used to determine the mechanisms of antimicrobial peptide activity. In particular, solid-state NMR studies have provided an atomic-level resolution explanation of membrane disruption by antimicrobial peptides. In more recent years, X-ray crystallography has been used to delineate in atomic detail how the family of plant defensins rupture membranes by identifying key phospholipids in the cell membranes of the pathogen. Human defensins have been thought to act through a similar mechanism, targeting cell membrane lipids as part of their function. In fact human beta-defensin 2 have now been shown to kill the pathogenic fungi Candida albicans through interactions with specific phospholipids. From the computational point of view, Molecular Dynamics simulations can provide detailed information about the structure and dynamics of the peptide-membrane interactions, including the orientation, conformation, and insertion of the peptide in the membrane, as well as specific peptide interactions with lipids, ions and solvent.
Sources: en.wikipedia.org
== Professional activities == Tippett's work in cybersecurity has led to roles as speaker, contributor and advisor to government and private sector organizations. From 2003 to 2005, he served on the President's Information Technology Committee (PITAC), established by Congress in 1997 under the High Performance Computing Act of 1991 to "guide the Administration's efforts to accelerate the development and adoption of information technologies vital for American prosperity in the 21st century." The U.S. Chamber of Commerce awarded Tippett its first Leadership in Health Care Award at the Chamber's first annual Health Care Summit (2012) for his leadership of Verizon's incubator. Tippett was also Chief Scientist for ICSA Labs and previously served as president of the International Computer Security Association. Tippett is currently an adjunct professor in the Division of General Medical Sciences at Case Western Reserve University School of Medicine. In November 2017, T.E.N., a technology and information security executive networking and relationship-marketing firm, announced that Tippett received the 2017 ISE® Luminary Leadership Award.
=== Marketing === Remicade is marketed by Janssen Biotech, Inc. (formerly Centocor Biotech, Inc.) in the United States, Mitsubishi Tanabe Pharma in Japan, Xian Janssen in China, and Schering-Plough (now part of Merck & Co) elsewhere.
Soy sauce is made either by fermentation or by hydrolysis. Some commercial sauces have both fermented and chemical sauces. Flavor, color, and aroma developments during production are attributed to non-enzymatic Maillard browning. Variation is usually achieved as the result of different methods and durations of fermentation, different ratios of water, salt, and fermented soy, or through the addition of other ingredients.
When purifying proteins, alkalies such as sodium hydroxide (NaOH) can be used safely and effectively. It is also widely used for depyrogenation of non-autoclavable equipment (e.g. plastics) and chromatography columns. In fact, when using an anion exchanger to remove pyrogens, it is necessary to clean the column with NaOH after each batch.
== History and name == Systematic studies of prostaglandins began in 1930, when Kurzrock and Lieb found that human seminal fluid caused either stimulation or relaxation of strips of isolated human uterus. They noted that uteri from patients who had gone through successful pregnancies responded to the fluid with relaxation, while uteri from sterile women responded with contraction. The name prostaglandin derives from the prostate gland, chosen when prostaglandin was first isolated from seminal fluid in 1935 by the Swedish physiologist Ulf von Euler, and independently by the Irish-English physiologist Maurice Walter Goldblatt (1895–1967). Prostaglandins were believed to be part of the prostatic secretions, and eventually were discovered to be produced by the seminal vesicles. Later, it was shown that many other tissues secrete prostaglandins and that they perform a variety of functions. The first total syntheses of prostaglandin F2α and prostaglandin E2 were reported by Elias James Corey in 1969, an achievement for which he was awarded the Japan Prize in 1989. In 1971, it was determined that aspirin-like drugs could inhibit the synthesis of prostaglandins. The biochemists Sune K. Bergström, Bengt I. Samuelsson and John R. Vane jointly received the 1982 Nobel Prize in Physiology or Medicine for their research on prostaglandins.
Sources: en.wikipedia.org
Topical cream formulation is an emulsion semisolid dosage form that is used for skin external application. Most of the topical cream formulations contain more than 20 per cent of water and volatiles and/or less than 50 per cent of hydrocarbons, waxes, or polyethylene glycols as the vehicle for external skin application. In a topical cream formulation, ingredients are dissolved or dispersed in either a water-in-oil (W/O) emulsion or an oil-in-water (O/W) emulsion. The topical cream formulation has a higher content of oily substance than gel, but a lower content of oily ingredient than ointment. Therefore, the viscosity of topical cream formulation lies between gel and ointment. The pharmacological effect of the topical cream formulation is confined to the skin surface or within the skin. Topical cream formulation penetrates through the skin by transcellular route, intercellular route, or trans-appendageal route. Topical cream formulation is used for a wide range of diseases and conditions, including atopic dermatitis (eczema), psoriasis, skin infection, acne, and wart. Excipients found in a topical cream formulation include thickeners, emulsifying agents, preservatives, antioxidants, and buffer agents. Steps required to manufacture a topical cream formulation include excipient dissolution, phase mixing, introduction of active substances, and homogenization of the product mixture.
==== Cofactors ==== Protein enzymes catalyze various chemical reactions, but over half of them incorporate cofactors to facilitate and diversify their catalytic activities. Cofactors are essential in biology, as they are based largely on nucleotides rather than amino acids. Ribozymes use nucleotide cofactors to create metabolism, with two basic choices: non-covalent binding or covalent attachment. Both approaches have been demonstrated using directed evolution to reinvent RNA dupes of protein-catalyzed processes. Lorsch and Szostak investigated ribozymes that could phosphorylate themselves and use ATP-γS as a substrate. However, only one of the seven classes of selected ribozymes had detectable ATP affinity, indicating that the ability to bind ATP was compromised. NAD+- dependent redox ribozymes were also evaluated. The selected ribozyme had a rate of enhancement of more than 107 fold and was proven to catalyze the reverse reaction - benzaldehyde reduction by NADH. Since the usage of adenosine as a cofactor is prevalent in current metabolism and is likely to have been common in the RNA world, these discoveries are essential for the evolution of metabolism in the RNA world.
In the famous Urey-Miller experiment, the passage of an electric arc through a mixture of methane, hydrogen, and ammonia produces a large number of amino acids. Since then, scientists have discovered a range of ways and components by which the potentially prebiotic formation and chemical evolution of peptides may have occurred, such as condensing agents, the design of self-replicating peptides and a number of non-enzymatic mechanisms by which amino acids could have emerged and elaborated into peptides. Several hypotheses invoke the Strecker synthesis whereby hydrogen cyanide, simple aldehydes, ammonia, and water produce amino acids. According to a review, amino acids, and even peptides, "turn up fairly regularly in the various experimental broths that have been allowed to be cooked from simple chemicals. This is because nucleotides are far more difficult to synthesize chemically than amino acids." For a chronological order, it suggests that there must have been a 'protein world' or at least a 'polypeptide world', possibly later followed by the 'RNA world' and the 'DNA world'. Codon–amino acids mappings may be the biological information system at the primordial origin of life on Earth. While amino acids and consequently simple peptides must have formed under different experimentally probed geochemical scenarios, the transition from an abiotic world to the first life forms is to a large extent still unresolved.
=== Anxiety === There is a small amount of research on the use of gabapentin for the treatment of anxiety disorders. Gabapentin is effective for the long-term treatment of social anxiety disorder and in reducing preoperative anxiety. In a controlled trial of breast cancer survivors with anxiety, and a trial for social phobia, gabapentin significantly reduced anxiety levels. For panic disorder, gabapentin has produced mixed results.
Sources: en.wikipedia.org
NMN stands for nicotinamide mononucleotide. It is a naturally occurring nucleotide and an intermediate in NAD+ biosynthesis.
No. NMN is a precursor that can be converted to NAD+ in cells. NAD+ is the larger dinucleotide that participates in many redox reactions.
Small amounts of NMN have been reported in several foods, including certain vegetables and fruits. The measured levels vary, and the significance of dietary intake is not fully established.
Purity is commonly measured by high-performance liquid chromatography with ultraviolet or mass spectrometric detection. Nuclear magnetic resonance can confirm identity and anomeric composition. Water content and residual solvents may be tested separately.