Everything below concerns BDNF. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-07-31. Numbers and descriptions here follow the published literature rather than marketing material.
Measuring peptide exposure inside the brain is technically difficult. Selank is degraded rapidly in plasma, and assays must separate intact peptide from fragments, which favors targeted mass spectrometry over immunoassays alone. Reported half-lives are short, on the order of minutes, so effects observed hours later are attributed to downstream signaling rather than to the parent compound. Blood-brain barrier permeability is debated and rarely quantified directly. Gaps include absent dose-response characterization, inconsistent reporting of purity, and almost no pharmacokinetic data from human participants.
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.
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.
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.
| 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 |
Most published work on selank originates from a small number of research groups in the Russian Federation. A large share of that record appears in Russian-language journals, which limits access for readers who rely on English-indexed databases. Independent replication by laboratories outside the original research network is sparse in publicly available sources. This concentration of origin and language is a frequently noted feature when the compound is summarized in broader reviews of synthetic peptides.
Reported pharmacological effects center on reduced anxiety-like behavior in animal models and on measures of memory and learning. Proposed contributing mechanisms include modulation of GABAergic signaling, shifts in monoamine turnover, and changes in the activity of enzymes that degrade neuropeptides. Effects on the expression of genes linked to neuroplasticity have also been described. No single molecular target is widely accepted, and whether the behavioral findings arise from one pathway or several remains an open question.
Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It was designed as a stabilized analogue of tuftsin, a naturally occurring tetrapeptide fragment derived from the immunoglobulin heavy chain. The additional Pro-Gly-Pro segment at the carboxyl terminus is intended to slow enzymatic cleavage. The compound is usually described in the literature as a synthetic peptide with anxiolytic and cognitive-related activity, a label that reflects a research context rather than an approved therapeutic category.
Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro, written TKPRPGP in one-letter notation. Its structure consists of the immunomodulatory tetrapeptide tuftsin, Thr-Lys-Pro-Arg, extended at the carboxyl terminus by a Pro-Gly-Pro segment. The molecular formula is commonly given as C33H57N11O9, corresponding to a monoisotopic mass near 751.4 Da and an average molecular mass near 751.9 Da. All seven residues are proteinogenic amino acids, and the molecule carries no modified side chains or non-natural linkages.
The compound was designed at the Institute of Molecular Genetics of the Russian Academy of Sciences during the 1980s and 1990s. The stated design goal was to retain the immunomodulatory and central nervous system activity attributed to tuftsin while improving resistance to enzymatic breakdown. Adding a proline-rich tail to the short parent peptide was a deliberate strategy, because proline residues restrict the conformations available to many peptidases. The same laboratory produced Semax, an ACTH fragment analog, and both compounds were developed in parallel as short, enzymatically stabilized peptides intended for intranasal use.
Lyophilised material kept dry at minus 20 degrees Celsius or colder is the most stable form, and suppliers commonly state a shelf life of two years or more under those conditions. Once dissolved, degradation accelerates through hydrolysis and deamidation, particularly at alkaline pH or elevated temperature. Working solutions are usually divided into single-use aliquots to avoid repeated freeze-thaw cycles. The choice of reconstitution solvent affects both stability and the ionic strength of the final preparation.
Reverse-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometres is the standard purity method. Mass spectrometry, typically electrospray ionisation, confirms identity through the expected mass-to-charge pattern. Amino acid analysis can verify composition independently. Chiral purity requires separate techniques such as derivatisation followed by chromatographic separation, and such data are rarely reported for research-grade material.
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.
Neuromodulation is "the alteration of nerve activity through targeted delivery of a stimulus, such as electrical stimulation or chemical agents, to specific neurological sites in the body". It is carried out to normalize – or modulate – nervous tissue function. Neuromodulation is an evolving therapy that can involve a range of electromagnetic stimuli, such as a magnetic field (rTMS), an electric current, or a drug delivered directly into the subdural space (intrathecal drug delivery). Emerging applications involve targeted introduction of genes or gene regulators and light (optogenetics), and by 2014, these had been at minimum demonstrated in mammalian models, or first-in-human data had been acquired. The most clinical experience has been with electrical stimulation. Neurotherapy, in modern use, is a synonym for neuromodulation. While neurotherapy may have a broader meaning, its modern definition focuses exclusively on technological methods that exert an energy-based effect on the development of a balanced nervous system in order to address symptom control and cure several conditions. Neurotherapy is a medical treatment that implements systemic targeted delivery of an energy stimulus or chemical agents to a specific neurological zone in the body to alter neuronal activity and stimulate neuroplasticity in a way that develops (or balances) a nervous system in order to treat different diseases, restore and/or to improve patients' physical strength, cognitive functions, and overall health.
=== Shareholders === Silicon Valley Bank's holding company, SVB Financial Group, was a component of the S&P 500. At the time of the collapse, its largest shareholders included The Vanguard Group, BlackRock, and State Street Corporation, which owned the stock in large exchange traded funds that track the performance of S&P 500. The South Korean National Pension Service owned 100,000 shares in SVB's holding company, SVB Financial Group. CalPERS (California state pension fund) held about $67 million in bonds to the bank, or less than two percent of one percent of total investments, as of June 2022. On March 13, shares of similar regional banks, including First Republic Bank, Western Alliance Bancorporation, and PacWest Bancorp plummeted.
At the start of the esophagus, where the laryngopharynx joins the esophagus, behind the cricoid cartilage Where it is crossed on the front by the aortic arch in the superior mediastinum Where the esophagus is compressed by the left main bronchus in the posterior mediastinum The esophageal hiatus, where it passes through the diaphragm in the posterior mediastinum
Like autistic savants, some hyperthymesiacs develop an obsessive fascination with dates. Jill Price, the first documented case, differed notably from mnemonist Solomon Shereshevsky, described by psychologist Alexander Luria. Shereshevsky could deliberately memorise vast amounts of information, whereas Price could recall only autobiographical events and generally performed poorly at memorisation tasks. Hyperthymestic individuals may even have below-average memory for arbitrary information. Another parallel drawn between Price and Shereshevsky is the role of synesthesia. Shereshevsky exemplified time-space synesthesia, and some researchers suggest superior autobiographical memory may be linked to this phenomenon.
==== Francesco Giorgi ==== Francesco Giorgi is the former parliamentary assistant and domestic partner of Eva Kaili. He was arrested in December 2022 before being released with an electronic tag in February 2023 having agreed a deal with the prosecutor to reveal details of the illegal organisation. According to his LinkedIn profile, Giorgi studied political science at the University of Milan. Giorgi started his relationship with Kaili in 2017. At the time Giorgi worked as an assistant at the European Parliament to Antonio Panzeri. Giorgi and Kaili have a child together. Giorgi was arrested by Belgian authorities mid-December 2022 in the context of the Qatargate scandal. He admitted having accepted bribes and alleged his partner Kaili was not directly involved in the corruption scheme. Giorgi is alleged to have helped channel funds from Qatar and Morocco to influence European institutions through setting up the association Fight Impunity together with Antonio Panzeri. In February 2023 Giorgi was released from prison with an electronic tag. Italian prosecutors have initiated an investigation in March 2023 into activities of two unnamed suspects who would have acted as collaborators of Antonio Panzeri and Giorgi. The Italian investigation related to a company called Equality Consultancy in Milan set up by a former accountant of Antonio Panzeri and Giorgi's father Luciano and brother Stefano in 2018. The brother and father of Giorgi left the company after a year and are not being investigated by Italian authorities.
Sources: en.wikipedia.org
In a bone marrow transplant, hematopoietic stem cells are removed from a person and infused into another person (allogeneic) or into the same person at a later time (autologous). If the donor and recipient are compatible, these infused cells will then travel to the bone marrow and initiate blood cell production. Transplantation from one person to another is conducted for the treatment of severe bone marrow diseases, such as congenital defects, autoimmune diseases or malignancies. The patient's own marrow is first killed off with drugs or radiation, and then the new stem cells are introduced. Before radiation therapy or chemotherapy in cases of cancer, some of the patient's hematopoietic stem cells are sometimes harvested and later infused back when the therapy is finished to restore the immune system. Bone marrow stem cells can be induced to become neural cells to treat neurological illnesses, and can also potentially be used for the treatment of other illnesses, such as inflammatory bowel disease. In 2013, following a clinical trial, scientists proposed that bone marrow transplantation could be used to treat HIV in conjunction with antiretroviral drugs; however, it was later found that HIV remained in the bodies of the test subjects.
The conquest of Armanum (location unknown but proposed as Tall Bazi) with its ruler Rid-Adad and Ebla (55 kilometers southwest of modern Aleppo) by Naram-Sin (Ebla was also defeated by his grandfather Sargon) is known from one of his year names "The year the king went on a campaign in Amarnum" and from an Old Babylonian copy of a statue inscription (IM 85461) found at Ur. There are also three objects, a marble lamp, a stone plaque, and a copper bowl, inscribed "Naram-Sin, the mighty, king of the four quarters, conqueror of Armanum and Ebla.". In 2010 a new stele fragment (IM 221139) describing the campaign was found at Tulul al-Baqarat (thought to be the ancient city of Kesh.
Urban tourism include national and internationally significant sports stadiums, museums, theatre and galleries. The Royal Armouries is in Leeds, as is the Leeds Playhouse (formerly the West Yorkshire Playhouse), Opera North and The Grand Theatre. The First Direct Arena in Leeds seats around 15,000 people. Sheffield Arena is also popular, as are the Bradford Alhambra, St Georges Hall and the National Science and Media Museum in Bradford. Leeds is the most popular shopping destination in West Yorkshire, and the wider region, with several notable retail destinations. Briggate and The Headrow are the most important shopping streets, while Trinity Leeds, Kirkgate Market (the biggest indoor market in Europe) and the White Rose Centre are regionally dominant shopping destinations. Victoria Leeds is nationally known for hosting many 'first outside of London' labels such as Harvey Nichols and Anthropologie. Leeds is also a popular weekend destination for nightlife, with several famous bars and clubs across a variety of different districts. The city's gay village is the largest in Yorkshire. A wide range of towns and cities are connected by rail to Leeds railway station, which is the busiest station in northern England and the main national gateway to West Yorkshire. The M62 motorway is the main east-west motorway in the county, connecting the largest towns and cities of West Yorkshire, while the M1 forms a key north-south axis from Leeds to Wakefield and beyond towards London.
=== Ligand exchange/functionalization === After initial nanoparticle synthesis, colloidal gold ligands are often exchanged with new ligands designed for specific applications. For example, Au NPs produced via the Turkevich-style (or Citrate Reduction) method are readily reacted via ligand exchange reactions, due to the relatively weak binding between the carboxyl groups and the surfaces of the NPs. This ligand exchange can produce conjugation with a number of biomolecules from DNA to RNA to proteins to polymers (such as PEG) to increase biocompatibility and functionality. For example, ligands have been shown to enhance catalytic activity by mediating interactions between adsorbates and the active gold surfaces for specific oxygenation reactions. Ligand exchange can also be used to promote phase transfer of the colloidal particles. Ligand exchange is also possible with alkane thiol-arrested NPs produced from the Brust-type synthesis method, although higher temperatures are needed to promote the rate of the ligand detachment. An alternative method for further functionalization is achieved through the conjugation of the ligands with other molecules, though this method can cause the colloidal stability of the Au NPs to breakdown.
Sources: en.wikipedia.org
== Wet-aged beef == Wet-aged beef is beef that has typically been aged in a vacuum-sealed bag to retain its moisture. Since the 1970s, with the development of vacuum packing machines and related technology, this has become the dominant mode of aging beef in the US and UK. It is popular with producers, wholesalers and retailers because it takes less time: typically only a few days and there is no moisture loss, so any given piece of meat sold by weight will have a higher value than a dry aged piece where moisture loss is desired for taste at the expense of final weight. The beef is usually kept for a period of 4 to 10 days in wet aging. Modified-atmosphere packaging (MAP) is usually employed for the vacuum packaging of meat; typically between 60 and 80 percent oxygen to retain its appetizing color, with red meat such as beef needing a higher oxygen level than less vividly colored meat such as pork. The vacuum packed beef is stored at a temperature of 32 to 45 °F (0 to 7 °C).
Congenital myopathy is a very broad term for any muscle disorder present at birth. This defect primarily affects skeletal muscle fibres and causes muscular weakness and/or hypotonia. Congenital myopathies account for one of the top neuromuscular disorders in the world today, comprising approximately 6 in 100,000 live births every year. As a whole, congenital myopathies can be broadly classified as follows:
1993/2854) Birmingham City Council (Grand Union Canal Bridge) Scheme 1992 Confirmation Instrument 1993 (S.I. 1993/2855) Mid Essex Community and Mental Health National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2856) Wigan and Leigh Health Services National Health Service Trust (Transfer of Trust Property) Order 1993 (S.I. 1993/2857) Public Airport Companies (Capital Finance) (Fourth Amendment) Order 1993 (S.I. 1993/2875) Conservation of Seals (England) Order 1993 (S.I. 1993/2876) Motor Vehicles Tyres (Safety) (Amendment) Regulations 1993 (S.I. 1993/2877) Local Government Reorganisation (Capital Money) (Greater London) (Amendment) Order 1993 (S.I. 1993/2878) Redbridge and Waltham Forest (London Borough Boundaries) Order 1993 (S.I. 1993/2881) Local Government (Compensation for Premature Retirement) (Amendment) Regulations 1993 (S.I. 1993/2890) Local Government Act 1988 (Defined Activities) (Exemption) (Wales) (No. 2) Order 1993 (S.I. 1993/2894) Protection of Wrecks (Designation No. 3) Order 1993 (S.I. 1993/2895) Community Health Sheffield National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2896) Public Telecommunication System Designation (Scottish Power Telecommunications Limited) Order 1993 (S.I. 1993/2897) Public Telecommunication System Designation (Torch Communications Limited) Order 1993 (S.I. 1993/2898) Public Telecommunication System Designation (MFS Communications Limited) Order 1993 (S.I. 1993/2899)
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 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.