The short version of tuftsin fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
Selank is a synthetic heptapeptide developed in Russia. Its sequence is Thr-Lys-Pro-Arg-Pro-Gly-Pro, a seven-residue chain built around the natural tetrapeptide tuftsin. Researchers at the Institute of Molecular Genetics of the Russian Academy of Sciences first described the compound in the mid-1990s. The design combined the tuftsin core with an added Pro-Gly-Pro tail, a modification intended to extend the molecule's stability in biological fluids. Published work on the peptide has appeared mainly in Russian-language journals.
Reported activity for Selank centers on anxiolytic and nootropic effects. Russian clinical reports describe use in anxiety and in cognitive or attention-related complaints. Most of this evidence comes from studies conducted by the same research groups that developed the peptide. Independent replication in other countries remains limited, and no major Western regulatory agency has approved the compound for any indication. The gap between local reports and external verification is a recurring point in discussions of the peptide.
Tuftsin, the parent structure, is a naturally occurring immunomodulatory tetrapeptide released from the Fc region of immunoglobulin G by spleen enzymes. Selank extends this four-residue sequence with three additional amino acids. The stated rationale is that the added tail slows enzymatic breakdown and may influence receptor interactions. How the full heptapeptide behaves at the molecular level is not firmly established, and proposed mechanisms often involve indirect modulation of neurotransmitter or immune signaling rather than a single defined target.
Characterization of Selank in laboratory settings relies on standard peptide analytical techniques. Reverse-phase high-performance liquid chromatography separates the peptide from related impurities and degradation products, while mass spectrometry confirms molecular identity through accurate mass measurement. Amino acid analysis and peptide sequencing verify the primary structure when reference material is unavailable. Because Selank is a short chain, fragmentation-based analysis produces a diagnostic ion pattern that supports confident identification.
Peptide stability depends strongly on temperature, moisture, and pH. Lyophilized Selank is generally most stable when stored cold and dry, with freezer temperatures commonly used for long-term storage. In solution, the compound is susceptible to hydrolysis and to microbial growth if it is not handled aseptically. The C-terminal proline-rich extension appears to slow enzymatic cleavage relative to tuftsin, though quantitative degradation rates vary with the matrix and the conditions tested. Published stability data specific to Selank remain sparse.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic heptapeptide | Modeled on tuftsin |
| Amino acid sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro | Seven residues |
| Approximate molecular mass | Around 750 Da | Depends on counter-ion and hydration |
| Common forms | Lyophilized powder | Also described as aqueous solution |
| Primary origin of research | Russian laboratories | Mid-1990s onward |
Characterization of Selank in a laboratory setting relies on standard peptide methods. Reverse-phase high-performance liquid chromatography separates the target from related impurities and provides a purity figure, commonly reported as 95 percent or higher. Mass spectrometry, typically electrospray ionization or matrix-assisted laser desorption, confirms the molecular mass and helps detect truncation or modification. Amino acid analysis can verify composition when a sequence-level check is needed. These techniques together establish identity and purity for a given lot.
Lyophilized Selank, the dry powder form, is generally stored frozen at minus 20 degrees Celsius or colder for long-term keeping. The solid is hygroscopic and should stay sealed, dry, and protected from light. Once dissolved, the peptide is less stable and is usually held refrigerated at 2 to 8 degrees Celsius for short periods. Repeated freezing and thawing is avoided because it can promote aggregation and loss of activity. Buffers and pH choice also affect how long a solution remains usable.
Selank is a synthetic heptapeptide developed in Russia as a structural analogue of tuftsin, a naturally occurring immunomodulatory tetrapeptide. Its sequence, Thr-Lys-Pro-Arg-Pro-Gly-Pro, keeps the tuftsin core at the N-terminus and appends a Pro-Gly-Pro tail. Researchers at the Institute of Molecular Genetics in Moscow synthesized the compound during the 1990s while searching for peptides with combined anxiolytic and immunomodulatory activity. The added tail was intended to resist enzymatic cleavage and prolong the molecule's presence in circulation.
The compound has a calculated molecular weight near 751.9 daltons and carries a net positive charge at physiological pH because of its arginine residue. It dissolves freely in water and in common aqueous buffers, and typically appears as a white or off-white lyophilized powder. The amide backbone makes the molecule susceptible to peptidases, which limits oral use and favors intranasal or parenteral routes. Nomenclature in the literature varies: the substance is also described by the sequence abbreviation TP-7 and by a Russian trade designation.
Quantification in biological matrices relies on liquid chromatography coupled to tandem mass spectrometry with stable-isotope internal standards. Low plasma concentrations and adsorption to container surfaces both complicate measurement. Solid-phase extraction is often needed to reduce matrix interference before injection. Reported limits of quantification differ widely between laboratories, which makes direct comparison of pharmacokinetic results difficult and limits meta-analysis.
Peptide bonds are vulnerable to protease attack, and Selank is no exception. Measured half-life in serum is short, on the order of minutes in several reports, which explains why intranasal administration is the common route described in the literature. Absorption across the nasal mucosa partially bypasses first-pass hepatic metabolism. Quantitative data on human bioavailability remain limited and are difficult to compare across studies.
In the 1497 expedition of Vasco da Gama, the curative effects of citrus fruit were known. In the 1500s, Portuguese sailors put in to the island of Saint Helena to avail themselves of planted vegetable gardens and wild-growing fruit trees. Authorities occasionally recommended plant food to prevent scurvy during long sea voyages. John Woodall, the first surgeon to the British East India Company, recommended the preventive and curative use of lemon juice in his 1617 book, The Surgeon's Mate. In 1734, the Dutch writer Johann Bachstrom gave the firm opinion, "scurvy is solely owing to a total abstinence from fresh vegetable food, and greens." Scurvy had long been a principal killer of sailors during the long sea voyages. According to Jonathan Lamb, "In 1499, Vasco da Gama lost 116 of his crew of 170; In 1520, Magellan lost 208 out of 230; ... all mainly to scurvy."
==== Addiction ==== Drug addiction is a complex set of behaviors typically associated with misuse of certain drugs, developing over time and with higher drug dosages. Addiction includes psychological compulsion, to the extent that the affected person persists in actions leading to dangerous or unhealthy outcomes. Opioid addiction includes insufflation or injection, rather than taking opioids orally as prescribed for medical reasons. In European nations such as Austria, Bulgaria, and Slovakia, slow-release oral morphine formulations are used in opiate substitution therapy (OST) for patients who do not well tolerate the side effects of buprenorphine or methadone. Buprenorphine can also be used together with naloxone for a longer treatment of addiction. In other European countries including the UK, this is also legally used for OST although on a varying scale of acceptance. Slow-release formulations of medications are intended to curb misuse and lower addiction rates while trying to still provide legitimate pain relief and ease of use to pain patients. Questions remain, however, about the efficacy and safety of these types of preparations. Further tamper resistant medications are currently under consideration with trials for market approval by the FDA. The amount of evidence available only permits making a weak conclusion, but it suggests that a physician properly managing opioid use in patients with no history of substance use disorder can give long-term pain relief with little risk of developing addiction, or other serious side effects.
Luis Moroder (6 December 1940 – 18 May 2024) was an Italian peptide chemist, who pioneered research on the interactions between peptide hormones and cell membrane-bound hormone receptors. He later expanded this research to other biological systems of medical relevance such as protein inhibitors, collagens, and synthetic proteins. A hallmark of his research is interdisciplinarity as reflected in his use and development of methods in organic chemistry, biophysics and molecular biology. He was a co-editor of the five-volume Houben-Weyl, Methods of Organic Chemistry, Synthesis of Peptides and Peptidomimetics. From 2008 he was the editor-in-chief of the Journal of Peptide Science, the official journal of the European Peptide Society.
Sources: en.wikipedia.org
Pipradrol, also known by its brand name Meratran, is a mild central nervous system stimulant that acts as a norepinephrine-dopamine reuptake inhibitor. Developed in the United States in the 1940s and patented in 1953, pipradrol was initially marketed as an antidepressant in the mid-1950s. It was subsequently used as an adjunct treatment for various conditions, including obesity, senile dementia, narcolepsy, and schizophrenia. Despite its initial promise and relatively mild stimulant effects compared to stronger alternatives, concerns about its abuse potential led to its regulation and withdrawal from widespread use in many countries during the late 1970s. Pipradrol is now classified as a controlled substance in several nations, including the United Kingdom, where it is typically placed in less restrictive drug schedules due to its lower abuse potential compared to other stimulants.
== History == The magazine was launched in October 1993 by Steve Jarratt, a long-time video games journalist who has launched several other magazines for Future. The artwork for the cover of the magazine's 100th issue was specially provided by Shigeru Miyamoto. The 200th issue was released in March 2009 with 200 different covers, each commemorating a single game; 199 variants were in general circulation, and one was exclusive to subscribers. Only 200 magazines were printed with each cover, sufficient to more than satisfy Edge's circulation of 28,898. In October 2003, the then-editor of Edge, João Diniz-Sanches, left the magazine along with deputy editor David McCarthy and other staff writers. After the walkout, the editorship of Edge passed back to Tony Mott, who had been editor prior to Diniz-Sanches. The only team member to remain was Margaret Robertson, who in 2006 replaced Mott as editor. In May 2007, Robertson stepped down as editor and was replaced by Tony Mott, taking over as editor for the third time. Alex Wiltshire was the magazine's editor from May 2012 to March 2013, followed by Nathan Brown. Jen Simpkins took over the editor's role from Nathan Brown in April 2020. Between 1995 and 2002, some of the content from the UK edition of Edge was published in the United States as Next Generation. In 2007, Future's US subsidiary, Future US began re-publishing selected recent Edge features on the Next Generation website; the Edge website and blog were subsequently incorporated into the NextGen site.
Glimepiride is indicated to treat type 2 diabetes; its mode of action is to increase insulin secretion by the pancreas. However it requires adequate insulin synthesis as prerequisite to treat appropriately. It is not used for type 1 diabetes because in type 1 diabetes the pancreas is not able to produce insulin.
Sources: en.wikipedia.org
=== Antimicrobial packaging === Antimicrobial packaging is designed to inhibit pathogenic or spoilage microorganisms on a product surface or within the package environment. Antimicrobial compounds may be incorporated into films and coatings, immobilised on a package surface, released into the package headspace, or contained in pads, labels, and separate emitters. Studied agents include organic acids, plant-derived compounds, enzymes, bacteriocins, metal ions, nanoparticles, and synthetic antimicrobial substances. The performance of antimicrobial packaging depends on the target microorganism, active-agent concentration, release rate, temperature, food composition, storage period, and contact between the package and the product. Absorbent pads used with meat, poultry, seafood, and fresh produce can combine liquid absorption with antimicrobial substances or freshness indicators.
Qullqas were built at every "tambo", which were inns located a day's march, about 22 kilometres (14 mi), from each other along many of the 40,000 kilometres (25,000 mi) of royal highways. The qullqas were primarily used to supply Inca officials and armies on the move as they relied on the qullqas for food rather than foraging—to the deprivation of the agricultural population—which was the common means by which armies around the world supplied their needs until the modern era. Another use for the stored items, especially food, was for the ceremonial feasts that were an important part of the relationship between the rulers and their subjects. Food was also distributed to the general populace in cases of crop failures or shortages of food.
I Am Maximus ridden by Paul Townend wins the 2024 Grand National. Sunak condemns Iran's attack against Israel and says the UK is working to stabilise the situation. 14 April Sunak confirms that RAF fighter jets shot down "a number of drones" fired at Israel by Iran. Richard Lee, whose daughter Katrice Lee disappeared near a British military base in Paderborn, Germany, in 1981, says he will hand back his Army medals in protest at how the case was handled. Lawyers representing around 250 survivors of the Manchester Arena bombing confirm plans to take legal action against MI5. Charities supporting asylum seekers announce plans to launch legal challenges to moving people to Rwanda once legislation declaring it a safe country is passed in the coming days. The Duke of Kent confirms he is stepping down as Colonel of the Scots Guards after 50 years, and handing the role over to the Duke of Edinburgh. The UK experiences its warmest temperature of 2024 so far, with 21.8 °C recorded in the village of Writtle, near Chelmsford, Essex. 15 April Sunak urges "all sides" to "show restraint" after Iran's attack on Israel. A report by the Resolution Foundation calls for changes to Universal Credit to take into account an aging population with health problems. 16 April Figures show the rate of UK unemployment rose to 4.2% between December 2023 and March 2024, its highest level for six months. EasyJet cancels all flights to and from Tel Aviv for the whole of the summer, citing safety concerns following Iran's drone and missile attack on Israel.
Sources: en.wikipedia.org
Selank is a synthetic peptide made of seven amino acids. It is modeled on tuftsin, a natural tetrapeptide, with an added three-residue tail. It is not a small-molecule drug.
It originates from research in Russia, associated with the Institute of Molecular Genetics of the Russian Academy of Sciences. The first descriptions date to the mid-1990s. Most published studies come from Russian laboratories.
No, Selank itself does not occur naturally. Its backbone is based on tuftsin, which is produced in the body, but the seven-residue version is a synthetic construct. It is supplied as a manufactured peptide.
The most common approach combines reverse-phase liquid chromatography with mass spectrometry. Chromatography separates the components while mass spectrometry confirms the molecular mass. Peptide sequencing or tandem mass analysis can further verify the amino acid order.