Everything below concerns Peptide mapping. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-07-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
The mechanisms attributed to semax are inferred from animal and cell studies rather than traced to one confirmed target. The most frequently cited pathway involves increased expression of brain-derived neurotrophic factor and nerve growth factor in hippocampal and cortical tissue. Some work points to engagement of melanocortin receptors, particularly MC4, which the parent ACTH fragment can activate. Effects on dopaminergic and serotonergic signalling have also been reported. No single account explains all observed results, and the relative weight of each pathway remains unsettled.
Published studies examine a fairly narrow set of endpoints. Rodent experiments commonly measure maze learning, infarct volume after induced ischemia, and tissue levels of neurotrophic factors. Clinical reports from Russian centres describe attention, memory and recovery scores in patients after stroke or transient ischemic attack. Most of those human studies are small and few have been repeated by independent groups. Outcome measures differ between studies, which limits direct comparison.
Semax is a synthetic heptapeptide developed in the Soviet Union during the 1980s by researchers at the Institute of Molecular Genetics in Moscow. It was designed as a truncated analog of adrenocorticotropic hormone, retaining only the fragment spanning residues four through ten. Investigators sought a peptide that would preserve the cognitive effects associated with ACTH while eliminating the hormonal stimulation of the adrenal cortex. The compound entered clinical use in Russia during the following decade.
Russian regulatory authorities approved the peptide for nasal administration, and it remains listed in the national pharmacopoeia under several trade names. Documented indications include acute ischemic stroke, transient ischemic attacks, traumatic brain injury, and certain ophthalmological and neurological conditions. Physicians also prescribe it for cognitive complaints in older patients, although the evidence base for that use is thinner. Outside Russia and a few neighboring states, the substance is not an approved medicine and is sold instead as a research chemical.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Lyophilized solid from research suppliers |
| Solubility | Freely soluble in water | Also dissolves in aqueous buffers; solutions are used fresh |
| Typical storage temperature | -20 °C for lyophilized powder | Short-term transport at 2-8 °C is common |
| Common analytical method | Reverse-phase HPLC | Paired with mass spectrometry for identity confirmation |
| Common synonyms | ACTH(4-10) analogue; MEHFPGP | N-terminal methionine retained in the chain |
The peptide is prone to several degradation pathways. Oxidation of the methionine residue produces a sulfoxide that elutes close to the parent peak in many chromatographic systems. Hydrolysis of peptide bonds and deamidation of susceptible residues in related sequences also reduce purity over time. Lyophilised material kept dry at minus twenty degrees Celsius and shielded from light is the most stable form commonly described in laboratory practice.
Material sold for laboratory use varies widely in stated purity and documentation. A certificate of analysis should list the analytical method, the column and detector used, and the observed purity value. Independent verification by an outside laboratory is the practical way to confirm identity when documentation is absent or internally inconsistent. Regulatory status differs by country, and a product legal in one jurisdiction may be unapproved or controlled in another.
The compound was developed in the 1980s at the Institute of Molecular Genetics in Moscow, where it emerged from research on short ACTH fragments and their effects on the central nervous system. Russian pharmaceutical listings describe it as a nootropic and neuroprotective agent, most often formulated as nasal drops. It is not a marketed medicine in the United States or the European Union, and no pharmacopoeial monograph covers it. Consequently, most published clinical experience with the substance originates from a small number of research centres, mainly in Russia and neighbouring countries.
Pharmacological accounts link semax to melanocortin signalling and to modulation of neurotrophic factor expression, particularly brain-derived neurotrophic factor and nerve growth factor. Much of this evidence comes from rodent studies using intranasal delivery, a route chosen because it allows peptides to reach the central nervous system with limited systemic exposure. Whether the same mechanisms operate in humans at comparable magnitude remains an open question. The precise receptor or receptors responsible for the reported behavioural and neuroprotective effects have not been conclusively identified.
Clinical reports describe use in ischaemic stroke, transient ischaemic attack, optic nerve conditions, and cognitive complaints, but most of these studies are small and were conducted in a single region. Systematic reviews have generally described the evidence base as limited in size and variable in methodological quality. Randomised controlled data suitable for international regulatory assessment are scarce. As a result, major treatment guidelines outside Russia do not include the peptide, and interest in it remains largely research-driven rather than routine clinical.
== Top scorers == Following the conclusion of the competition, Wrexham player Paul Mullin was awarded the FA Cup Golden Ball Award, commemorating him as the top scorer of the season from the extra preliminary round through to the final with eight goals.
The capacity to store retinol in the liver means that well-nourished humans can go months on a vitamin A deficient diet without manifesting signs and symptoms of deficiency. Two liver cell types are responsible for storage and release: hepatocytes and hepatic stellate cells (HSCs). Hepatocytes take up the lipid-rich chylomicrons, bind retinol to retinol-binding protein 4 (RBP4), and transfer the retinol-RBP4 to HSCs for storage in lipid droplets as retinyl esters. Mobilization reverses the process: retinyl ester hydrolase releases free retinol which is transferred to hepatocytes, bound to RBP4, and put into blood circulation. Other than either after a meal or when consumption of large amounts exceeds liver storage capacity, more than 95% of retinol in circulation is bound to RBP4.
=== Large cap indices === Russell 1000 Index: The large-cap index of the top 1,000 stocks in the Russell 3000 Index. Russell Top 500 Index: Another large-cap index, consisting of the top 500 stocks in the Russell 1000 Index. Russell Top 200 Index: The mega-cap index of the very largest 200 stocks in the Russell 1000 Index. Russell Top 100 Index: Mega-cap index of the top 100 stocks in the Russell 1000 Index. Russell Top 50 Index: Measures the performance of the 50 largest mega-cap companies in the Russell 1000 Index. Russell Top 20 Index: Mega-cap index of the top 20 stocks in the Russell 1000 Index. Russell Top 10 Index: Mega-cap index of the top 10 stocks in the Russell 1000 Index.
Sources: en.wikipedia.org
The main mechanisms of action of IUDs occur before fertilization, by preventing sperm from ever reaching the egg. The specific mechanism for preventing sperm from reaching the egg differs by type of IUD.
With the death of Stalin and ensuing de-Stalinisation, Marxism–Leninism underwent revisions and adaptations such as Guevarism, Titoism, Ho Chi Minh Thought, Hoxhaism, and Maoism, with the latter two constituting anti-revisionist Marxism–Leninism. These adaptations caused splits between communist states, resulting in the Tito–Stalin split, the Sino-Soviet split, and the Sino-Albanian split. As the Cold War concluded with the demise of much of the socialist world, many surviving communist states reformed their economies and embraced market socialism. Complementing this economic shift, the Communist Party of China developed Maoism into Deng Xiaoping Theory. Today this comprises part of China's governing ideology, with the latest developments including Xi Jinping Thought. Meanwhile, the Communist Party of Peru developed Maoism into Marxism–Leninism–Maoism. The latest developments to Marxism–Leninism–Maoism include Gonzaloism, Maoism-Third Worldism, National Democracy, and Prachanda Path. Ongoing Marxist–Leninist (Maoist) insurgencies include those waged in the Philippines, India, and Turkey. The Nepalese Civil War, fought by Marxist–Leninist–Maoists, ended in their victory in 2006. Criticism of Marxism–Leninism overlaps with criticism of communist party rule and focuses on the actions and policies of Marxist–Leninist leaders, notably Stalin and Mao Zedong. Communist states have been marked by centralised state control by the communist party, political repression, state atheism, collectivisation and labour camps.
Nerve growth factor (NGF) is a neurotrophic factor and neuropeptide primarily involved in the regulation of growth, maintenance, proliferation, and survival of certain target neurons. It is perhaps the prototypical growth factor, in that it was one of the first to be described. Since it was first isolated by Nobel laureates Rita Levi-Montalcini and Stanley Cohen in 1954, numerous biological processes involving NGF have been identified, two of them being the survival of pancreatic beta cells and the regulation of the immune system.
=== Ustekinumab === Ustekinumab was approved by the FDA in 2009 for the treatment of plaque psoriasis, making it the first and so far the only approved interleukin antagonist. It is also used for the treatment of Crohn's disease and psoriatic arthritis. Studies suggest that the blocking of IL-23, rather than IL-12, has the greatest effect on the therapeutic benefits of ustekinumab.
Sources: en.wikipedia.org
=== Endocrine effects === As with other SSRIs, citalopram can cause an increase in serum prolactin level. Citalopram has no significant effect on insulin sensitivity in women of reproductive age and no changes in glycaemic control were seen in another trial.
=== Hepatitis === Till around 2010, PEGylated interferon alfa-2b in combination with ribavirin, was part of the standard regimen used in management of hepatitis C. Ribivarin helped in increasing the Sustained Virologic Response (SVR) even more. Developed by Schering-Plough, the drug was approved by Food and Drug Administration (FDA) of the United States in 2001, and has been on the World Health Organization's List of Essential Medicines as a therapy for chronic hepatitis C since 2013. A 2013 meta-analysis over Clinical Infectious Diseases noted the combination-treatment to be safe as well as effective for children and adolescents; other meta-analyses had noted the same for adult population. A 2012 meta-analysis had found PEGylated interferon alfa-2a to be the more effective variant for treatment-naive patients. With the advent of Direct-Acting-Antivirals (DAAs — ), interferon-based treatment regimens gradually fell out of fashion due to relatively poor efficacy and high frequency of adverse side-effects. No longer recommended, the use of PEGylated interferon alfa-2b has essentially ceased in all countries, where DAA therapeutics are available.
=== India === Owing to rampant misuse, over-prescription, and unregulated over-the-counter access to antibiotics, the growth of AMR superbugs has proliferated in India. Pharmacies surveyed by the Karnataka government revealed that 80% of drugs were being sold without a prescription. A CDC survey revealed that half of inpatients were using "antibiotics from the 'Watch' category of WHO's AWaRe classification, which should be reserved for severe infections." In 2019, India reported 300,000 deaths because of infections relating to AMR, India also reports the most number of tuberculosis cases resistant to antibiotics.
Sources: en.wikipedia.org
It consists mainly of animal experiments and small clinical reports, with much of the clinical material published in Russian-language journals. Large independent trials are scarce. Separating reliable effects from chance findings is consequently difficult.
A fraction of an intranasal dose is thought to reach the central nervous system, and this route is favoured partly for that reason. The proportion is not well characterized. Direct measurement in humans remains difficult with current methods.
Raised BDNF and NGF expression has been reported across several animal studies, which makes the signal fairly consistent. Whether the same change occurs in humans at usable doses is not established. It is best treated as a working hypothesis rather than a confirmed clinical mechanism.
It originated at the Institute of Molecular Genetics in Moscow during the 1980s. The work was carried out by a Russian research group that specialized in peptide neuropharmacology.