A practical reference on Somatotroph: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-04-29 and is reviewed periodically as new material appears.
A documented effect of tesamorelin is a reduction in visceral adipose tissue in some study populations. Researchers have reported decreases in trunk fat measured by computed tomography alongside changes in lipid markers. The mechanism is thought to involve growth hormone-mediated lipolysis, though the precise contribution of direct versus indirect pathways is not fully resolved. Studies have generally examined defined groups over finite periods, so long-term outcomes are less well characterized. Findings have not been uniform across all trials.
Tesamorelin is a synthetic peptide analog of growth hormone-releasing hormone (GHRH). Its sequence corresponds to the 44-amino-acid form of human GHRH with a trans-3-hexenoyl group attached to the N-terminal tyrosine. This modification slows enzymatic cleavage and extends the peptide's activity relative to the native hormone. The compound is produced by solid-phase peptide synthesis and supplied as a lyophilized powder. Researchers classify it as a GHRH receptor agonist. Its structure places it in the same family as other growth hormone secretagogues that act on the pituitary.
After injection, the peptide binds receptors on somatotroph cells in the anterior pituitary. Receptor activation raises intracellular cyclic AMP and triggers release of stored growth hormone into the bloodstream. Because the compound works through the body's own regulatory system, growth hormone pulses retain much of their normal feedback control. Repeated administration also raises insulin-like growth factor 1, a hormone produced mainly in the liver. Investigators treat that rise as a marker that the pituitary axis has been engaged.
Clinical study of tesamorelin has centered on adults with HIV-associated lipodystrophy, a condition in which abdominal fat accumulates while peripheral fat is lost. In controlled trials, treated participants showed reductions in visceral adipose tissue measured by imaging, alongside modest shifts in some lipid values. Effects on subcutaneous fat were smaller and less consistent across studies. Whether these changes translate into fewer cardiovascular events remains an open question, because the trials were not designed or powered to answer it.
Tesamorelin is a synthetic peptide that acts as an analog of growth hormone-releasing hormone, a natural hypothalamic signal. Its sequence corresponds to the forty-four amino acid form of the human hormone, with a small acyl group attached near the amino terminus. That modification slows enzymatic breakdown and extends the time the peptide remains active in circulation. The compound was developed as a pharmacological way to raise endogenous growth hormone output rather than supplying the hormone directly.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | GHRH receptor agonist |
| Residue count | 44 amino acids | N-terminal trans-3-hexenoyl group |
| Approximate mass | About 5.1 kDa | Derived from the peptide sequence |
| Primary target | Pituitary GHRH receptor | Somatotroph cells of the anterior pituitary |
| Downstream marker | IGF-1 | Measured indirectly in circulation |
=== Legacy and claims of responsibility === Multiple claims of responsibility have continued to be put forward years after the recovery of the pumpkin. In 1999, editor-in-chief of the school paper Farhad Manjoo received an anonymous tip which potentially explained how the prank was carried out, involving a climb up the spire of the tower and the use of duct tape. The May 2000 Graduation issue of the Cornell Daily Sun stated that the prank was carried out by one Cornell student ringleader and two other Ithacan accomplices. In the Cornell Chimes Newsletter, it was stated that a student from the University of Montana, "Rob", confessed to former Head Chimesmaster Courtney Kimball that they had placed the pumpkin; Atlas Obscura deemed this inauthentic, though Cornell historian Ryan Earle stated that this was "the best source for how it happened." One rumor also claimed that the prankster's identity was passed down through each university archivist. In 2017, 20 years following the placement of the first pumpkin atop the tower, Manjoo, then reporter at The New York Times, called the event "the greatest prank in Cornell history" and that there was "no downside" in the pranksters coming forward as "all of that has passed now. Now they're just legends." Evan Fay Earle, the university archivist in 2017, stated that the pumpkin "continue[d] to generate interest at Cornell and [in] the community". The website about the pumpkin was partially brought back online for the anniversary.
In those on insulin, routinely checking blood sugar levels (such as through a continuous glucose monitor) is advised; however, this may not be needed in those who are not on insulin therapy. Bariatric surgery often improves diabetes in those who are obese. Rates of type 2 diabetes have increased markedly since 1960 in parallel with obesity. As of 2015, there were approximately 392 million people diagnosed with the disease compared to around 30 million in 1985. Typically, it begins in middle or older age, although rates of type 2 diabetes are increasing in young people. Type 2 diabetes is associated with a ten-year-shorter life expectancy. Diabetes was one of the first diseases ever described, dating back to an Egyptian manuscript from c. 1500 BCE. Two types of diabetes were identified in 400–500 CE, one type associated with youth (now identified as type 1) and the other associated with being overweight (now identified as type 2). The importance of insulin in the disease was determined in the 1920s.
Estrogen (US English) or oestrogen (Commonwealth English) is a category of sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics. There are three major endogenous estrogens that have estrogenic hormonal activity: estrone (E1), estradiol (E2), and estriol (E3). Estradiol, an estrane, is the most potent and prevalent. Another estrogen called estetrol (E4) is produced only during pregnancy. Estrogens are synthesized in all vertebrates and some insects. Quantitatively, estrogens circulate at lower levels than androgens in both men and women. While estrogen levels are significantly lower in males than in females, estrogens nevertheless have important physiological roles in males. Like all steroid hormones, estrogens readily diffuse across the cell membrane. Once inside the cell, they bind to and activate estrogen receptors (ERs) which in turn modulate the expression of many genes. Additionally, estrogens bind to and activate rapid-signaling membrane estrogen receptors (mERs), such as GPER (GPR30). In addition to their role as natural hormones, estrogens are used as medications, for instance in menopausal hormone therapy, hormonal birth control and feminizing hormone therapy for transgender women, intersex people, and nonbinary people. Synthetic and natural estrogens have been found in the environment and are referred to as xenoestrogens. Estrogens are among the wide range of endocrine-disrupting compounds and can cause health issues and reproductive dysfunction in both wildlife and humans.
==== Analysis of bound ligands ==== The final step requires bioanalytical separation of bound ligands from their targets, and subsequent identification of ligands using liquid chromatography-mass spectrometry. AS-MS offers means for identifying small molecule-protein interactions either directly - through top-down proteomic detection of intact complexes - or indirectly - through denaturation of small molecule-protein complexes followed by identification of small molecules using mass spectrometry. The top-down approach requires direct infusion of the complex into an electrospray ionization mass spectrometry source under conditions gentle enough to preserve the interaction and maintain its integrity in the transition from liquid to gas. While this was shown to be possible by Ganem and Henion in 1991, it is not suitable for high throughput. Interestingly, electron capture dissociation, which is typically used in structure elucidation of peptides, has been used to identify ligand binding sites during top-down analysis. A simpler method for analysis of bound ligands uses a protein precipitation extraction to denature proteins and release ligands into the precipitation solution, which can then be diluted and identified on an LC-MS system.
Sources: en.wikipedia.org
The Cold War was a period of international geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc. It began in the aftermath of the Second World War and ended with the dissolution of the Soviet Union in 1991. The term cold war is used because there was no direct fighting between the two superpowers, though each supported opposing sides in regional conflicts known as proxy wars. In addition to the struggle for ideological and economic influence and an arms race in both conventional and nuclear weapons, the Cold War was expressed through technological rivalries such as the Space Race, espionage, propaganda campaigns, embargoes, and sports diplomacy. After the end of the Second World War in 1945, during which the US and USSR had been allies, the USSR installed satellite governments in its occupied territories in Eastern Europe and North Korea by 1949, resulting in the political division of Europe (and Germany) by an "Iron Curtain". The USSR tested its first nuclear weapon in 1949, four years after the US used its own on Hiroshima and Nagasaki, and allied with the People's Republic of China, founded in 1949. The US declared the Truman Doctrine of "containment" of communism in 1947, launched the Marshall Plan in 1948 to assist Western Europe's economic recovery, and founded the NATO military alliance in 1949 (matched by the Soviet-led Warsaw Pact in 1955).
Field rations are sometimes used by campers. These meals contain pre-prepared or precooked foods in shelf-stable packaging, are designed to provide enough calories and nutrients to sustain an individual for a full day, and often come with their heaters, making them ideal for use in camping. Canned foods and instant foods are also sometimes used.
Botrytis tulipae is a major fungal disease affecting tulips, causing cell death and eventually the rotting of the plant. Other pathogens include anthracnose, bacterial soft rot, blight caused by Sclerotium rolfsii, bulb nematodes, other rots including blue moulds, black moulds and mushy rot. The fungus Trichoderma viride can infect tulips, producing dried leaf tips and reduced growth, although symptoms are usually mild and only present on bulbs growing in glasshouses. Variegated tulips admired during the Dutch tulipomania gained their delicately feathered patterns from an infection with the tulip breaking virus, a mosaic virus that was carried by the green peach aphid, Myzus persicae. While the virus produces fantastically streaked flowers, it also weakens plants and reduces the number of offsets produced. Dutch growers would go to extraordinary lengths during tulipomania to make tulips break, borrowing alchemists' techniques and resorting to sprinkling paint powders of the desired hue or pigeon droppings onto flower roots. Tulips affected by the mosaic virus are called "broken"; while such plants can occasionally revert to a plain or solid colouring, they will remain infected and have to be destroyed. Today the virus is almost eradicated from tulip growers' fields. The multicoloured patterns of modern varieties result from breeding; they normally have solid, un-feathered borders between the colours. Tulip growth is also dependent on temperature conditions. Slightly germinated plants show greater growth if subjected to a period of cool dormancy, known as vernalisation.
== Culinary and other uses == Fresh or dried peppermint leaves are often used alone in peppermint tea or with other herbs in herbal teas (tisanes, infusions). Peppermint is used for flavouring ice cream, candy, fruit preserves, alcoholic beverages, chewing gum, toothpaste, and some shampoos, soaps, and skin care products. Menthol activates cold-sensitive TRPM8 receptors in the skin and mucosal tissues, and is the primary source of the cooling sensation that follows the topical application of peppermint oil.
== Further reading == Polonsky, K. S. (2012). "The Past 200 Years in Diabetes". New England Journal of Medicine. 367 (14): 1332–1340. doi:10.1056/NEJMra1110560. PMID 23034021. American Association of Clinical Endocrinologists Type II Lifestyle Guidelines Archived 2019-01-27 at the Wayback Machine
Sources: en.wikipedia.org
== Measurement == Further information: Thyroid function tests Triiodothyronine (T3) and thyroxine (T4) can be measured as free T3 and free T4, which are indicators of their activities in the body. They can also be measured as total T3 and total T4, which depend on the amount that is bound to thyroxine-binding globulin (TBG). A related parameter is the free thyroxine index, which is total T4 multiplied by thyroid hormone uptake, which, in turn, is a measure of the unbound TBG. Additionally, thyroid disorders can be detected prenatally using advanced imaging techniques and testing fetal hormone levels.
=== Non-topical formulations for hair growth === Low-dose oral minoxidil started to emerge as a treatment for hair loss in 2015 and after with the work of Rodney Sinclair and other researchers. Subsequently, interest in and use of low-dose oral minoxidil for hair loss increased dramatically following the publication of an August 2022 New York Times article titled "An Old Medicine Grows New Hair for Pennies a Day, Doctors Say". New non-topical formulations of minoxidil for hair loss, such as extended-release oral minoxidil and sublingual minoxidil, have been developed in the 2020s towards formal approval for treatment of hair loss and with improved efficacy and/or tolerability profiles.
nonilfenossipolietilenossietanolo (33 letters – chemical) pentagonododecaedrotetraedrico (30 letters – 3D geometric figure) esofagodermatodigiunoplastica (29 letters – surgery) elettroencefalograficamente (27 letters – medical adverb: electroencephalographically) diclorodifeniltricloroetano (27 letters – chemical: DDT)
Human alpha-1-antitrypsin is another protein that has been produced from goats and is used in treating humans with this deficiency. Another medicinal area is in creating pigs with greater capacity for human organ transplants (xenotransplantation). Pigs have been genetically modified so that their organs can no longer carry retroviruses or have modifications to reduce the chance of rejection. Chimeric pigs could carry fully human organs. The first human transplant of a genetically modified pig heart occurred in 2023, and kidney in 2024. Livestock are modified with the intention of improving economically important traits such as growth-rate, quality of meat, milk composition, disease resistance and survival. Animals have been engineered to grow faster, be healthier and resist diseases. Modifications have also improved the wool production of sheep and udder health of cows. Goats have been genetically engineered to produce milk with strong spiderweb-like silk proteins in their milk. A GM pig called Enviropig was created with the capability of digesting plant phosphorus more efficiently than conventional pigs. They could reduce water pollution since they excrete 30 to 70% less phosphorus in manure. Dairy cows have been genetically engineered to produce milk that would be the same as human breast milk. This could potentially benefit mothers who cannot produce breast milk but want their children to have breast milk rather than formula. Researchers have also developed a genetically engineered cow that produces allergy-free milk.
In certain situations where strong electroosmotic flow toward the cathode is undesirable, the inner surface of the capillary can be coated with polymers, surfactants, or small molecules to reduce electroosmosis to very low levels, restoring the normal direction of migration (anions toward the anode, cations toward the cathode). CE instrumentation typically includes power supplies with reversible polarity, allowing the same instrument to be used in "normal" mode (with EOF and detection near the cathodic end of the capillary) and "reverse" mode (with EOF suppressed or reversed, and detection near the anodic end of the capillary). One of the most common approaches to suppressing EOF, reported by Stellan Hjertén in 1985, is to create a covalently attached layer of linear polyacrylamide. The silica surface of the capillary is first modified with a silane reagent bearing a polymerizable vinyl group (e.g. 3-methacryloxypropyltrimethoxysilane), followed by introduction of acrylamide monomer and a free radical initiator. The acrylamide is polymerized in situ, forming long linear chains, some of which are covalently attached to the wall-bound silane reagent. Numerous other strategies for covalent modification of capillary surfaces exist. Dynamic or adsorbed coatings (which can include polymers or small molecules) are also common. For example, in capillary sequencing of DNA, the sieving polymer (typically polydimethylacrylamide) suppresses electroosmotic flow to very low levels.
Sources: en.wikipedia.org
It mirrors the 44-residue form of human growth hormone-releasing hormone. A hexenoyl group on the N-terminal tyrosine distinguishes it from the unmodified hormone. The change is intended to improve resistance to enzymatic breakdown.
The N-terminal modification reduces cleavage by circulating peptidases, so the peptide persists longer than native GHRH. That persistence is the main rationale for the synthetic design. Comparative half-life values in humans are reported in regulatory review documents rather than in general reference literature.
Reductions in visceral adipose tissue have been measured in controlled studies of defined populations. Whether the effect generalizes to other groups and persists after treatment stops is less clear. Longer-term outcome data remain limited.
It is a laboratory-made peptide that mimics growth hormone-releasing hormone. It prompts the pituitary gland to release growth hormone and has been studied mainly in adults with HIV-associated lipodystrophy.