tuftsin raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-01-24. Anything still debated is marked as such rather than presented as settled.
Selank is studied chiefly as an animal-model anxiolytic with proposed secondary effects on memory and immune signaling. Reported mechanisms include modulation of the GABA-A receptor complex, inhibition of enkephalin-degrading enzymes, and shifts in monoamine turnover within limbic structures. Some experiments describe increased expression of brain-derived neurotrophic factor in the hippocampus after repeated dosing. No single molecular target has been confirmed, and the peptide does not bind any receptor with the selectivity typical of a conventional small-molecule drug. Mechanism therefore remains a set of hypotheses rather than an established pathway.
Laboratory work relies on standard behavioral paradigms. Rodents are tested in the elevated plus maze, open field, and passive avoidance tasks, with outcomes compared against diazepam or vehicle controls. Intranasal dosing is used most often because it bypasses first-pass metabolism, though intraperitoneal and intravenous routes also appear in published protocols. Biochemical endpoints include tissue BDNF concentrations, cytokine levels, and monoamine metabolites. Human data are limited to small Russian trials reporting reduced anxiety scores; most were not prospectively registered, and few employed independent outcome assessment.
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.
Regulatory status differs sharply by region. Selank holds a Russian marketing authorization, where it is supplied mainly as nasal drops, while authorities elsewhere have not approved it for medical use. Material sold internationally is therefore usually labeled as a research chemical rather than a medicine. Peer-reviewed publications come predominantly from Russian laboratories, and sample sizes are generally small. Whether the compound produces comparable effects under independent, well-controlled replication remains an open question that the broader literature has not settled.
| Property | Value | Notes |
|---|---|---|
| Principal proposed target | GABA-A receptor complex | Hypothesis derived mainly from animal pharmacology |
| Common behavioral assay | Elevated plus maze | Rodent test for anxiety-like behavior |
| Reported molecular marker | Hippocampal BDNF expression | Measured by immunoassay or mRNA quantification |
| Typical dosing route | Intranasal | Chosen to reduce first-pass metabolism |
| Reported plasma half-life | Minutes | Based on limited peptide stability data |
Quality assessment of Selank samples typically combines purity determination with identity confirmation and counter-ion analysis. Purity is usually reported as a percentage by chromatographic area, with values above 95 percent often quoted for research-grade material. Water content and residual solvents are checked in lyophilized batches because they affect both stability and accurate mass determination. A reported purity figure does not by itself establish that a sample is the intended sequence, so orthogonal methods are needed to rule out sequence isomers or truncation products.
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.
The primary structure of Selank is Thr-Lys-Pro-Arg-Pro-Gly-Pro, corresponding to the molecular formula C33H57N11O9 and a monoisotopic mass of roughly 751.9 daltons. The N-terminal threonine and the arginine residue in the fourth position are shared with tuftsin, which carries the sequence Thr-Lys-Pro-Arg. The three additional residues at the C-terminus, Pro-Gly-Pro, extend the chain and are associated with greater resistance to enzymatic degradation. This extension also separates Selank from the shorter parent peptide.
Naming conventions place Selank in the same research family as Semax, another Russian-developed peptide investigated for cognitive effects. The two compounds share a lineage but differ in sequence and in the biological systems proposed as their targets. Semax descends from ACTH fragments, whereas Selank descends from tuftsin. Publications sometimes identify Selank by its full peptide sequence or by laboratory codes rather than one uniform trade name. Because replication outside Russia is limited, reports on its properties are best read alongside the study design and the purity of the material tested.
MALDI/TOF serves as a method for determining the drug resistance of bacteria, especially to β-lactams (Penicillin family). The MALDI/TOF detects the presence of carbapenemases, which indicates drug resistance to standard antibiotics. It is predicted that this could serve as a method for identifying a bacterium as drug resistant in as little as three hours. This technique could help physicians decide whether to prescribe more aggressive antibiotics initially.
== See also == State Sponsors of Terrorism (U.S. list) Specially Designated Nationals and Blocked Persons List United States sanctions on Bangladesh Caesar Syria Civilian Protection Act Rogue state Economic sanctions against the United States Permanent normal trade relations Arms Export Control Act Criticism of United States foreign policy European Union sanctions United Kingdom sanctions United States foreign adversaries
Cheaper, faster, and smarter POCT devices have increased the use of POCT approaches by making it cost-effective for many diseases, such as diabetes, carpal tunnel syndrome (CTS) and acute coronary syndrome. Additionally, it is very desirable to measure various analytes simultaneously in the same specimen, allowing a rapid, low-cost, and reliable quantification. Therefore, multiplexed point-of-care testing (xPOCT) has become more important for medical diagnostics in the last decade. Many point-of-care test systems are realized as easy-to-use membrane-based test strips, often enclosed by a plastic test cassette. This concept often is realized in test systems for detecting pathogens, the most common being COVID-19 rapid tests. Very recently such test systems for rheumatology diagnostics have been developed, too. These tests require only a single drop of whole blood, urine or saliva, and they can be performed and interpreted by any general physician within minutes. Recently, a portable medical diagnostic device called "BioPoC" has been reported which employs free-standing enzyme-modified responsive polymer membrane-based biosensors and a newly devised low-cost transduction principle for the detection of H. pylori and urea. During the COVID-19 pandemic, rapid development of POCT occurred, aiming to improve the turnaround time and ease of use compared to the gold standard lab-based PCR test. These have included rapid antigen tests, alternate nucleic acid amplification methods, and novel sensors.
Orthogonal protection is a strategy allowing the specific deprotection of one protective group in a multiply-protected structure. For example, the amino acid tyrosine could be protected as a benzyl ester on the carboxyl group, a fluorenylmethylenoxy carbamate on the amine group, and a tert-butyl ether on the phenol group. The benzyl ester can be removed by hydrogenolysis, the fluorenylmethylenoxy group (Fmoc) by bases (such as piperidine), and the phenolic tert-butyl ether cleaved with acids (e.g. with trifluoroacetic acid). A common example for this application, the Fmoc peptide synthesis, in which peptides are grown in solution and on solid phase, is very important. The protecting groups in solid-phase synthesis regarding the reaction conditions such as reaction time, temperature and reagents can be standardized so that they are carried out by a machine, while yields of well over 99% can be achieved. Otherwise, the separation of the resulting mixture of reaction products is virtually impossible (see also § Industrial applications).
Sources: en.wikipedia.org
== Production == Pyruvic acid is prepared by treating tartaric acid with acid. It can also be produced by oxidation of propylene glycol by potassium permanganate or bleach. The hydrolysis of acetyl cyanide, formed by reaction of acetyl chloride with potassium cyanide, represents yet another route:
== Indications == Neumega is indicated for the prevention of severe thrombocytopenia and the reduction of the need for platelet transfusions following myelosuppressive chemotherapy in adult patients with nonmyeloid malignancies who are at high risk of severe thrombocytopenia. Efficacy was demonstrated in patients who had experienced severe thrombocytopenia following the previous chemotherapy cycle.
==== Offenders of unsound mind ==== Persons proven to be of unsound mind when they commit capital crimes, once found guilty, are not to be given the death penalty. These offenders can be sentenced to another form of indefinite detention under TPP, being detained at medical facilities, prisons or at some other safe places in custody, and subject to psychiatric review of their mental conditions until suitable for release.
== History == Originally, Mohs used a chemical paste (an escharotic agent) to cauterize and kill the tissue. It was made of zinc chloride and bloodroot (the root of the plant Sanguinaria canadensis, which contains the alkaloid sanguinarine). The original ingredients were 40.0 g Stibnite, 10.0 g Sanguinaria canadensis, and 34.5 ml of saturated zinc chloride solution. This paste is similar to black salve or "Hoxsey's paste" (see Hoxsey Therapy), a fraudulent patent medicine, but its usage is different. Hoxsey used the paste for long periods, a harmful practice that was rapidly discredited. Mohs left the paste on the wound only overnight, and the following day, the cancer and surrounding skin would be anesthetized and the cancer removed. The specimen was then excised, and the tissue examined under the microscope. If cancer remained, more paste was applied, and the patient would return the following day. Later, local anesthetic and frozen section histopathology applied to fresh tissue allowed the procedure to be performed the same day, with less tissue destruction, and similar cure rate.
== Description == A boom generally floats on the surface, while a chain can be on the surface or below the water. A chain could be made to float with rafts, logs, ships or other wood, making the chain a boom as well.
Sources: en.wikipedia.org
is the molar latent heat of melting. In most substances, the volume increases when melting occurs, so the melting temperature increases with pressure. However, because ice is less dense than water, the melting temperature decreases. In glaciers, pressure melting can occur under sufficiently thick volumes of ice, resulting in subglacial lakes. The Clausius-Clapeyron relation also applies to the boiling point, but with the liquid/gas transition the vapor phase has a much lower density than the liquid phase, so the boiling point increases with pressure. Water can remain in a liquid state at high temperatures in the deep ocean or underground. For example, temperatures exceed 205 °C (401 °F) in Old Faithful, a geyser in Yellowstone National Park. In hydrothermal vents, the temperature can exceed 400 °C (752 °F). At sea level, the boiling point of water is 100 °C (212 °F). As atmospheric pressure decreases with altitude, the boiling point decreases by 1 °C every 274 meters. High-altitude cooking takes longer than sea-level cooking. For example, at 1,524 metres (5,000 ft), cooking time must be increased by a fourth to achieve the desired result. Conversely, a pressure cooker can be used to decrease cooking times by raising the boiling temperature. In a vacuum, water will boil at room temperature.
=== Risk factors === There are a number of risk factors for insulin resistance, including being overweight or obese or having a sedentary lifestyle. Various genetic factors can increase risk, such as a family history of diabetes, and there are some specific medical conditions associated with insulin resistance, such as polycystic ovary syndrome. The U.S. National Institute of Diabetes and Digestive and Kidney Diseases states that specific risks that may predispose an individual to insulin resistance can include:
In Ireland, the potato was introduced at the end of the 16th century and quickly became the main staple food until the end of the 19th century. Among the peasants, it appears at every meal and in one form, the simplest possible, boiled in water. The tubers, with their skins, are cooked in a cauldron, the only utensil necessary for their preparation, in a bottom of water. After cooking, the contents of the cauldron are poured into a shallow wicker basket, called a skeehogue, which allows for easy draining, and the whole family, sitting around the basket in front of the fireplace, serves itself with its hands, without fork or knife. In more affluent homes, where people eat at the table, another characteristic utensil is used: a trivet in the form of a fairly high ring (dish ring). Often made of silver and richly decorated, its function was to protect the tabletop from the heat. In 1740, a shortage of potatoes led to a famine in the country – although on a smaller scale than the one that hit Europe – in Ireland in 1845, causing nearly a million deaths and several million refugees and emigrants.
== Adult life == Elizabeth returned to school in 1923 and graduated from Barnard College in 1929. In 1930 she married William T. Gossett, a lawyer who later served as the president of the American Bar Association (1968-69) as well as vice president and general counsel of the Ford Motor Company. They lived in Bloomfield, Michigan, and had two daughters and a son. Elizabeth Gossett was active in civic affairs in the Detroit area. She was a member of the board of trustees of Barnard College, one of the founding trustees of Oakland University, Rochester, a member of the Detroit Urban League, as well as a volunteer at the Merrill-Palmer Institute and at Michigan State University. She was best known as the founder of the Supreme Court Historical Society in 1972 and served as its president until 1979. Gossett died of a heart attack on April 21, 1981, at the age of 73. By the time of her death, she had received approximately 42,000 insulin injections over 58 years. Although her name had been prominently mentioned in the newspaper coverage of insulin in 1922, she later hid her diabetes from her friends and associates. She destroyed most of the material that documented her treatments, and even removed references to diabetes in her father's papers.
Sources: en.wikipedia.org
Intranasal administration predominates in both animal and human research because it avoids hepatic first-pass metabolism. Injectable and intraperitoneal routes appear in animal work mainly for comparison.
Behavioral endpoints include time spent in open arms of the elevated plus maze and avoidance latencies. Biochemical endpoints include BDNF concentration, cytokine levels, and monoamine metabolite ratios in brain tissue.
Most published studies are small, originate from a limited number of laboratories, and lack independent replication. Dose-response relationships, measured brain exposure, and long-term outcomes are not well characterized.
Selank is a synthetic seven-amino-acid peptide modeled on tuftsin, a fragment of the immunoglobulin G heavy chain. It was designed in Russia to combine anxiolytic and immunomodulatory properties in one molecule.