The short version of Melanocortin receptor fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-05-20. Anything still debated is marked as such rather than presented as settled.
Semax binds to melanocortin receptors and is thought to influence neuronal survival and plasticity rather than to act through the adrenal axis. Laboratory work has shown increased expression of brain-derived neurotrophic factor and nerve growth factor in treated tissue. Changes in c-Fos, a marker of neuronal activation, have also been reported. Because the peptide is rapidly degraded by peptidases, its effects are generally attributed to downstream signaling cascades rather than to sustained receptor occupancy.
Published studies are dominated by animal models of stroke, ischemia, and cognitive impairment, with a smaller number of human trials conducted in Russia. Many of the human reports are small, single-center, and published in Russian-language journals, which limits independent scrutiny. Outcome measures vary between studies and often rely on clinician-rated scales rather than objective biomarkers. Systematic reviews have noted the methodological weaknesses and called for larger, preregistered trials before firm conclusions can be drawn.
Development of the compound took place in the Soviet Union during the 1980s, largely through peptide research groups affiliated with the Shemyakin-Ovchinnikov Institute and Moscow State University. Investigators screened fragments of adrenocorticotropic hormone for activity on the central nervous system while attempting to separate cognitive effects from hormonal ones. The shortened sequence was selected because it retained behavioral activity in animal models without stimulating corticosteroid release. Early publications described the molecule as an ACTH(4-10) analog.
Published research on this peptide originates mainly from Russian laboratories, and the wider international literature is comparatively thin. Studies have used rodent models of stroke, hypoxia, and memory tasks, with a smaller number of human trials reported. Reported outcomes include changes in attention and memory measures, along with effects on neurotrophic factor expression in some experiments. Small sample sizes, inconsistent dosing protocols, and limited independent replication are widely noted limitations, so the strength of the clinical evidence remains an open question.
| Property | Value | Notes |
|---|---|---|
| Appearance | White lyophilized powder | Typical for synthetic peptides |
| Solubility | Freely soluble in water | Also soluble in saline |
| Storage temperature | -20 C or below | Protect from repeated freeze-thaw |
| Analytical method | Reverse-phase HPLC | Confirms purity and identity |
| Common synonym | ACTH(4-10) analog | Reflects structural origin |
从分子层面看，Semax 是线性七肽，没有二硫键、糖基或脂链修饰，N 端为游离氨基，C 端为游离羧基。分子含组氨酸与谷氨酸侧链，因此在水和甲醇等极性溶剂中溶解良好，在非极性溶剂中溶解有限。计算分子量约为 814 Da，与其质子化离子的质荷比吻合，可用于质谱确认。
稳定性主要由水解与氧化两条路径支配。肽键在中性或弱酸性条件下相对稳定，遇到强碱或长时间高温则明显断裂；甲硫氨酸侧链容易被氧化成亚砜，使主峰前移并拉低实际含量。金属离子、光照和反复冻融会进一步促进降解或聚集。冻干粉在低温避光条件下可存放较长时间，配制后的水溶液通常需要冷藏并尽快用完。
纯度评估以反相高效液相色谱为主，通过主峰面积百分比给出粗略结果，再配合电喷雾质谱核对分子量。氨基酸分析可验证组成比例，手性色谱或毛细管电泳用于检查残基构型。常见杂质包括缺失序列的短肽、氧化产物与二聚体。由于多数市售品不附带完整检验报告，独立第三方检测常被用来核实标称值。
Laboratory descriptions of the material are consistent across suppliers. It appears as a white to off-white lyophilized powder that dissolves readily in water and in polar organic solvents such as dimethyl sulfoxide. Aqueous solutions are clear and colorless at low concentrations. Because the peptide contains methionine, oxidation at the sulfur atom is a recognized degradation pathway, and handling notes usually call for protected, desiccated storage. Reported purity for research-grade lots is generally above 95 percent as measured by reversed-phase high-performance liquid chromatography.
The compound is registered in Russia as a pharmaceutical product, most commonly formulated as a nasal solution, and has been used in that setting since the 1990s. Outside that jurisdiction it is generally handled as a research chemical rather than an approved medicine. Regulatory status therefore differs sharply between countries, and material sold internationally may not correspond to the Russian pharmaceutical formulation. Documentation with commercial samples is typically limited to a certificate of analysis covering purity and identity, not clinical status or local legal classification.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It corresponds to the ACTH(4-7) fragment extended at the C-terminus by a Pro-Gly-Pro tripeptide, an addition intended to slow enzymatic breakdown. The molecular formula is C37H51N9O10S and the molecular mass is approximately 814 daltons. In the literature it is often described as an ACTH(4-10) analog, although that label reflects a naming convention as much as a precise structural relationship. The compound was developed in Russia and remains most closely associated with that research tradition.
==== Narration styles ==== Voice-over narrator The traditional style for narration is to have a dedicated narrator read a script which is dubbed onto the audio track. The narrator never appears on camera and may not know the subject matter or be involved in writing the script.
In 2019, senior executives from A&W, presenting at a conference organized by LabourWatch, were recorded sharing the anti-union measures that the franchisor allegedly takes when made aware of potential unionization activity at any franchisee or corporate-owned locations. Nancy Wuttunee, the Vice President, People Potential and Mike Atkinson, then-Regional Vice President, Eastern Canada, divulged that A&W's Home Office keeps a "'watch list' of franchises that are 'high risk for unionizing'" and that, when alerted of potential unionization efforts, Wuttunee described that the company has a “fire drill” reaction, which is "a rapid-response 'crisis management process' for responding to things that 'worry us.'" News of the presentation was released by PressProgress (a left-wing news site launched by the Broadbent Institute, a social democratic think tank in Canada). Some local politicians in Toronto, where the conference took place, criticized the company and its executives' remarks, including Toronto City Councillor Gord Perks who tweeted "Hey [A&W Canada], I'm never buying from you again, and I will tell as many people as I can to avoid you too. Canadians have a constitutional right to bargain collectively. Leave Canada." A&W continues to grow its number of locations within the province of Ontario and Atkinson is now the dedicated Vice President, Ontario.
6 May 1986 – USS Ray, USS Archerfish and USS Hawkbill meet and surface together at the Geographic North Pole. First three-submarine surfacing at the Pole. 19 May 1987 – HMS Superb joined USS Billfish and USS Sea Devil at the North Pole. March 2007 – USS Alexandria participated in the Joint US Navy/Royal Navy Ice Exercise 2007 (ICEX-2007) in the Arctic Ocean with the Trafalgar-class submarine HMS Tireless. March 2009 – USS Annapolis took part in Ice Exercise 2009 to test submarine operability and war-fighting capability in Arctic conditions.
In addition to ongoing support for the game before moving onto other projects, Crowbar Collective stated that they have been contacted by other teams, such as the Sven Co-op team, to help integrate their work into the final Black Mesa product. The team also wanted to incorporate support for the Steam Workshop so that other players could add their own mods to the game. In addition to the modification itself, the game's thematic score, produced by sound designer Joel Nielsen, was independently released as a soundtrack in 2012. Nielsen released the score for the Xen levels in 2019.
Sources: en.wikipedia.org
== Playwrights == Peter Barnes, playwright Steven Berkoff, playwright, actor, author, and theatre director Ashley Blaker, comedian and television producer; writer for TV and radio and longtime collaborator with Matt Lucas: was producer of Little Britain and Rock Profile. Lucas described Blaker as "the UK's only Orthodox comedian". Blaker's Off-Broadway show, Strictly Unorthodox, opened in 2017 at The Theater Center. and his second Off-Broadway show, Goy Friendly opened in February 2020, at SoHo Playhouse. Ben Elton (born 3 May 1959) comedian, actor, author, playwright, lyricist and director; was a part of London's alternative comedy movement of the 1980s and writer on the sitcoms The Young Ones and Blackadder, as well as stand-up comedian on stage and television; style in the 1980s was left-wing political satire; Elton is cousin of singer Olivia Newton-John; Elton's father is from a German-Jewish family and Elton's mother, who was raised in the Church of England, is of English background; has published 17 novels and written numerous rock operas and musicals. Ronald Harwood (né Horwitz; 9 November 1934 – 8 September 2020) was a South African Jewish -born British author, playwright, and screenwriter, best known for his plays for the British stage as well as the screenplays for The Dresser (for which he was nominated for an Oscar) and The Pianist, for which he won the 2003 Academy Award for Best Adapted Screenplay. He was nominated for the Best Adapted Screenplay Oscar for The Diving Bell and the Butterfly (2007); cousin of Antony Sher.
== Overview == In most countries, immunohematology and transfusion medicine specialists provide expert opinion on massive transfusions, difficult/incompatible transfusions and rational use of specialised blood product therapy like irradiated blood/leukodepleted/washed blood products. The blood donor center is the facility that collects blood components from screened blood donors, either whole blood or separate components such as plasma or platelets only via apheresis. These blood components are then transported to a central location for processing such as fractionation, testing and redistribution. The testing includes determining blood type and testing for infectious diseases. Whole blood is fractionated into red blood cells, platelets and plasma whilst plasma can be further refined into separate components such as albumin, clotting factor concentrates and immunoglobulin. The blood bank is the section of the clinical laboratory where laboratory scientists store and distribute blood components. Both areas are typically overseen by a specialist in transfusion medicine. Transfusion medicine was earlier a branch of clinical pathology, however the field has now expanded into a clinical, hospital-based specialty. The practice of transfusion medicine involves both laboratory and clinical aspects of transfusion as communication between blood bank and patients, treating specialists and other medical staff is vital in situations such as massive transfusions or transfusion reactions.
All chemical elements derive from stellar nucleosynthesis except for hydrogen and some helium and lithium. Basic chemical ingredients of life – the carbon–hydrogen molecule (CH), the carbon–hydrogen positive ion (CH+) and the carbon ion (C+) – can be produced by ultraviolet light from stars. Complex molecules, including organic molecules, form naturally both in space and on planets. Organic molecules on the early Earth could have had either terrestrial origins, with organic molecule synthesis driven by impact shocks or by other energy sources, such as ultraviolet light, redox coupling, or electrical discharges; or extraterrestrial origins (pseudo-panspermia), with organic molecules formed in interstellar dust clouds or in the solar nebula accumulating onto the planet.
Sources: en.wikipedia.org
Ehlers–Danlos syndromes (EDS) are a group of 13 genetic connective tissue disorders. Symptoms often include loose joints; joint pain; stretchy, velvety skin; and abnormal scar formation. These may be noticed at birth or in early childhood. Complications may include aortic dissection, joint dislocations, scoliosis, chronic pain, or early osteoarthritis. The existing classification was last updated in 2017, when a number of rarer forms of EDS were added. EDS occurs due to mutations in one or more of the 19 particular genes which can contribute to the condition. The specific gene affected determines the type of EDS, though the genetic causes of hypermobile Ehlers–Danlos syndrome (hEDS) are still unknown. Some cases result from a new variation occurring during early development. In contrast, others are inherited in an autosomal dominant or recessive manner. Typically, these variations result in defects in the structure or processing of the protein collagen or tenascin. Diagnosis is often based on symptoms, particularly hEDS, but people may initially be misdiagnosed with somatic symptom disorder, depression, or myalgic encephalomyelitis/chronic fatigue syndrome. Genetic testing can be used to confirm all types of EDS except hEDS, for which a genetic marker has yet to be discovered. A cure is not yet known, and treatment is supportive in nature. Physical therapy and bracing may help strengthen muscles and support joints.
=== GamerGate === In 2014, Baldwin became associated with GamerGate after using the hashtag "#GamerGate" during the controversy. Sources differed on how to characterize his role in the hashtag's origin: Time wrote that Baldwin "coined" the term, The Washington Post reported that its origin was disputed and that Baldwin claimed credit for it, and The New Yorker described it as having been popularized by him. The New Yorker also reported that Baldwin linked to a video making an allegation about game developer Zoë Quinn that the magazine said had since been "proved false". In a 2014 interview with Vulture, Baldwin described GamerGate as focused on ethics in games journalism and argued that threats of violence should not be treated as inherent to the hashtag, calling it "a mistake to commingle the two". WIRED later described Baldwin as lending "high profile support" to the controversy, while the Columbia Journalism Review wrote that, in the absence of clear spokespeople for GamerGate, journalists sometimes interviewed "proxies like actor Adam Baldwin".
This local processing is especially important in image processing, where the early CNN layers typically identify simple local patterns such as edges and curves, with subsequent layers detecting more complex patterns like textures, and eventually whole objects.
=== Background === Mogo is a sentient and living planet. When it is desired, its affiliation with the Corps is shown with foliage arranged into a green band, marked with the standard Green Lantern Corps lantern symbol, circling Mogo's equator. In its early appearances, Mogo is not a social Green Lantern and its interactions with the rest of the DC universe are not well documented. It avoids announcing its presence, preferring to represent itself using pseudonymous holograms. In Mogo's first appearance, it is explained that the planet-sized Mogo's gravitational field would wreak havoc on any other planet it would try to "visit", hence Mogo "doesn't socialize". At the same time, Mogo has allowed alien races to live on its surface and has been willing to change its conditions to suit them. When Parallax, possessing Hal Jordan, destroys the power battery on Oa and kills the Guardians, Mogo loses contact with the Green Lantern energy that helped sustain him. Without energy, Mogo loses consciousness and drifts through Sector 1014 until he is discovered by a nomadic alien race, who strip Mogo of his natural resources and pollute his environment. Mogo's body reacts instinctively, creating constructs to hinder the aliens' efforts to exploit his resources. Mogo is finally rescued by Kyle Rayner, who uses his power ring to reawaken him. With the restoration of the Green Lantern Corps, Mogo has taken on the role of a training and recreation planet for his fellow Green Lanterns. Soranik Natu, Kyle Rayner, and other Lanterns have traveled to his sector to ask for his counsel.
Sources: en.wikipedia.org
It is associated with the melanocortin receptor family, particularly subtypes found in the central nervous system. This interaction is separate from the adrenal pathway activated by full-length ACTH.
Peptidases degrade the compound within minutes in circulation. This short half-life is one reason nasal delivery is used, placing the substance close to the olfactory and trigeminal pathways.
No large multicenter trials have been published in English-language journals. The existing human evidence consists mainly of smaller studies conducted in Russia, which limits generalization.
It is a synthetic peptide of seven amino acids. Its backbone corresponds to a fragment of adrenocorticotropic hormone extended at the carboxyl end. The material is distributed as a lyophilized solid for laboratory use.