GHRH analogue is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-02-07. Where a claim depends on a specific study, the study is described rather than over-claimed.
Tesamorelin occupies a narrow position among agents that act on the growth hormone axis. Unlike growth hormone itself, which is given as replacement, it stimulates the pituitary to release the hormone in pulses, so the downstream increase in insulin-like growth factor 1 depends on intact somatotroph function. Other peptides in the same family include shorter GHRH fragments and synthetic secretagogues with different stability profiles. Several points remain unresolved, including whether the reduction in visceral fat translates into fewer cardiovascular events, what happens to metabolic markers after long-term use, and how the drug compares with lifestyle or surgical approaches.
Tesamorelin is a synthetic peptide that belongs to the growth hormone-releasing hormone family and contains the same forty-four amino acid sequence as endogenous GHRH, extended at the amino terminus by a trans-3-hexenoyl group. That small fatty acid modification protects the peptide from rapid cleavage by dipeptidyl peptidase-4, the enzyme that shortens the half-life of native GHRH to only a few minutes. Chemically the compound is produced by solid-phase peptide synthesis, purified by chromatography, and supplied as a sterile lyophilized powder for reconstitution.
Regulatory approval in the United States came in 2010, when the Food and Drug Administration cleared the peptide for the reduction of excess abdominal fat in adults with HIV infection and associated lipodystrophy. The decision rested mainly on two randomized phase 3 trials that enrolled roughly eight hundred patients and ran for twenty-six weeks. Participants receiving active drug showed substantially greater declines in visceral adipose tissue than those receiving placebo, while total body weight changed comparatively little. A reformulated presentation was later approved, and the product has remained a niche therapy rather than a general weight-loss agent.
Measured responses usually involve growth hormone and insulin-like growth factor 1, known as IGF-1. Growth hormone rises in bursts and is difficult to sample reliably, while IGF-1 shifts more slowly and can be assessed from a single blood draw. Studies therefore treat IGF-1 as the more practical pharmacodynamic marker. Both are indirect, showing that the receptor was engaged rather than that the peptide reached a particular concentration. Direct exposure measurement requires an assay aimed at the molecule itself.
Published work tends to frame tesamorelin as a tool for studying the GHRH axis and as a compound with measurable effects on body composition. Reports often describe visceral adipose tissue as an endpoint, assessed by imaging rather than by inference. Analytical sections commonly describe liquid chromatography with tandem mass spectrometry to confirm identity and purity, because immunoassays may cross-react with related fragments. Where results diverge between studies, differences in assay choice, sampling timing, and population are frequent explanations offered. Whether effects persist after treatment stops remains an open question.
| Property | Value | Notes |
|---|---|---|
| Peptide class | Synthetic GHRH analogue | 44 residues; N-terminal trans-3-hexenoyl group |
| First approval year | 2010 | United States; HIV-associated abdominal fat accumulation |
| Administration route | Subcutaneous injection | Abdominal site; clinician-administered or self-injected |
| Common synonyms | TH9507; tesamorelin acetate | Development code and acetate salt form |
| Originator | Canadian biotechnology firm | Original developer and regulatory sponsor |
A Phase 3 program led to regulatory approval in the United States in 2010 for reduction of excess visceral abdominal fat in adults with HIV and lipodystrophy. Subsequent studies examined effects on liver fat, muscle area, and metabolic markers, with mixed findings for some endpoints. Long-term cardiovascular outcomes and effects on mortality remain uncertain because most trials were relatively short and focused on imaging-based fat measurements. Use in populations without HIV has been studied experimentally but is not part of the approved indication.
Tesamorelin is a synthetic analog of growth hormone-releasing hormone, a peptide hormone produced by the hypothalamus. The molecule retains the 44-amino-acid sequence of human GHRH and carries a trans-3-hexenoyl modification at its N-terminus. This modification increases resistance to enzymatic degradation and extends the peptide's functional stability relative to native GHRH. The compound is supplied as a lyophilized powder for reconstitution and subcutaneous administration in clinical settings. Its development code was TH9507, and it belongs to the GHRH analog class. It is not a growth hormone product; instead, it acts upstream to stimulate endogenous growth hormone release.
Stability testing examines how the molecule changes under controlled stress. Thermal stress, light exposure, and extremes of pH are applied separately so that each degradation route can be attributed to a specific cause. The main observed changes are oxidation, deamidation, and aggregation into dimers or higher-order species. Accelerated studies at elevated temperature are used to estimate behavior over longer periods, though such extrapolation carries uncertainty. For a lyophilized powder, residual moisture and the choice of bulking agent strongly influence how quickly these changes appear.
Practical handling centers on limiting moisture, oxygen, and temperature excursions. Lyophilized material is generally held at or below minus twenty degrees Celsius, protected from light and kept sealed until use. Once reconstituted, solutions are typically kept cold and used within a short window because hydrolysis and microbial growth both accelerate in liquid form. Repeated freeze-thaw cycles are avoided, since they promote aggregation. Vial contents should be inspected for particulates and clarity before analysis, and working aliquots are prepared to reduce the number of times the stock is opened.
In August 2020, scientists described one way cells—in particular cells of a slime mold and mouse pancreatic cancer-derived cells—are able to navigate efficiently through a body and identify the best routes through complex mazes: generating gradients after breaking down diffused chemoattractants which enable them to sense upcoming maze junctions before reaching them, including around corners.
=== UDP-GalNAc synthesis === Human and selected bacterial GALE isoforms bind UDP-GlcNAc, reversibly catalyzing its conversion to UDP-GalNAc. A family of glycosyltransferases known as UDP-N-acetylgalactosamine:polypeptide N-acetylgalactosamine transferases (ppGaNTases) transfers GalNAc from UDP-GalNAc to glycoprotein serine and threonine residues. ppGaNTase-mediated glycosylation regulates protein sorting, ligand signaling, resistance to proteolytic attack, and represents the first committed step in mucin biosynthesis.
A period of rule under the Swedish House of Vasa began in the Commonwealth in the year 1587. The first two kings from this dynasty, Sigismund III (r. 1587–1632) and Władysław IV (r. 1632–1648), repeatedly attempted to intrigue for accession to the throne of Sweden, which was a constant source of distraction for the affairs of the Commonwealth. At that time, the Catholic Church embarked on an ideological counter-offensive and the Counter-Reformation claimed many converts from Polish and Lithuanian Protestant circles. In 1596, the Union of Brest split the Eastern Christians of the Commonwealth to create the Uniate Church of the Eastern Rite, but subject to the authority of the pope. The Zebrzydowski rebellion against Sigismund III unfolded in 1606–1608. Seeking supremacy in Eastern Europe, the Commonwealth fought wars with Russia between 1605 and 1618 in the wake of Russia's Time of Troubles; the series of conflicts is referred to as the Polish–Russian War or the Dymitriads. The efforts resulted in expansion of the eastern territories of the Polish–Lithuanian Commonwealth, but the goal of taking over the Russian throne for the Polish ruling dynasty was not achieved. Sweden sought supremacy in the Baltic during the Polish–Swedish wars of 1617–1629, and the Ottoman Empire pressed from the south in the Battles at Cecora in 1620 and Khotyn in 1621. The agricultural expansion and serfdom policies in Polish Ukraine resulted in a series of Cossack uprisings.
The situation during Tehuantepecers and Santa Ana wind events are more complicated, as they occur when air rushing southward due to cold air damming east of the Sierra Madre Oriental and Sierra Nevada respectively, is accelerated when it moves through gaps in the terrain. The Santa Ana is further complicated by down-sloped air, or foehn winds, drying out and warming up in the lee of the Sierra Nevada and coastal ranges, leading to a dangerous wildfire situation.
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=== Occurrence in plants === Numerous nitriles occur as secondary metabolites in plants. In Ricinus communis (Ricinus communis), in addition to the highly toxic protein ricin, the alkaloid ricinin is present, which contains a nitrile functional group. The structurally closely related nudiflorin occurs in Trevia nudiflora (family spurge family). In brown mustard, indoleacetonitrile is present; it is formed from indoleacetaldoxime and presumably functions in defense against pathogenic fungi. In jojoba, various nitriles are found, including simmondsin, a glycoside containing an α,β-unsaturated nitrile moiety in the aglycone. A similar compound, menis daurin, occurs in European holly (Ilex aquifolium). α,β-Unsaturated nitriles are also present in several species of the genus Acacia, including Sutherlandin and Acacipetalin. The horseradish tree (horseradish tree) contains niazirine, a glycoside of 4-hydroxyphenylacetonitrile. The fragrant sweet pea (Lathyrus odoratus) causes the disease lathyrism, for which N-glutamyl-3-aminopropionitrile and its degradation product 3-aminopropionitrile are responsible. The essential oil of Heracleum transcaucasicum (genus hogweed) contains geranylnitrile. 3-cyanopyridine is found in annual bindweed. Cyanolipids are a class of lipids that occur exclusively in soap tree plants (Sapindaceae). Their alcohol component is an unsaturated nitrile with five carbon atoms and one or two hydroxy groups, in contrast to glycerol in glycerides. Soap tree plants containing cyanolipids include soapnut tree and guarana.
Alkyl amines characteristically feature tetrahedral nitrogen centers. C-N-C and C-N-H angles are near 109°. C-N distances are slightly shorter than C-C distances. The energy barrier for the nitrogen inversion of the stereocenter is about 7 kcal/mol for a trialkylamine. The interconversion has been compared to the inversion of an open umbrella into a strong wind. Amines of the type NHRR' and NRR′R″ are chiral: the nitrogen center bears four substituents counting the lone pair. Because of the low barrier to inversion, amines of the type NHRR' cannot be obtained in optical purity. For chiral tertiary amines, NRR′R″ can only be resolved when the R, R', and R″ groups are constrained in cyclic structures such as N-substituted aziridines (quaternary ammonium salts are resolvable).
. The deformation of a fluid element, relative to some previous state, can be first order approximated by a strain tensor that changes with time. The time derivative of that tensor is the strain rate tensor, that expresses how the element's deformation is changing with time; and is also the gradient of the velocity vector field
== Research == Thymosin α1 (TA1), a molecule with immune enhancing properties, was the first of the thymosins to enter clinical trials. It has been approved in China and more than 30 other countries, and has shown great promise in the treatment of severe sepsis, cancer, and a number of other diseases including the potential treatment of cystic fibrosis. Most recently, TA1 has been found to synergize with a check-point inhibitor and further extend the survival of Stage III/IV melanoma patients previously treated with TA1. Thymosin β4 (Tβ4), the second of the thymosins to reach the clinic, has been shown to accelerate wound healing and the remodeling of injured tissues. An injectable form of Tβ4 has been developed for internal indications such as myocardial infarction, stroke and brain trauma. Early Phase 2 trials have been completed in patients with pressure and venostasis ulcers. Two Phase 2/3 trials in patients with dry eye and neurotrophic keratopathy have been completed in the United States with promising results. A third Phase 3 trial in dry eye will begin in 2019. RegeneRx Biopharmaceuticals is developing an injectable form of Tβ4 for internal indications such as myocardial infarction, stroke, multiple sclerosis, brain trauma, and peripheral neuropathy. Dr. Goldstein's research has helped define the role of biological response modifiers in health and disease, and has led to the discovery of important new links between the immune system, the neuroendocrine system and the brain.
Carl Gustav Jung was born 26 July 1875 in Kesswil, in the Swiss canton of Thurgau, as the first surviving son of Paul Achilles Jung (1842–1896) and Emilie Jung (née Preiswerk; 1848–1923). His birth was preceded by two stillbirths and that of a son named Paul, born in 1873, who survived only a few days. Paul Jung, Carl's father, was the youngest son of a noted German-Swiss physician and professor of medicine at Basel, Karl Gustav Jung (1794–1864). Karl Jung became Rector of Basel University and Master of the Swiss Lodge of Freemasons. It was rumoured that he was the illegitimate son of Goethe, but this is likely a legend. Paul Jung was a rural pastor in the Swiss Reformed Church.Jung considered his father reliable, but weak and powerless. Emilie Preiswerk, Carl's mother, grew up in a large family whose Swiss roots went back five centuries. She was the youngest child of a distinguished Basel churchman and academic, Samuel Preiswerk (1799–1871), and his second wife. Samuel Preiswerk was an Antistes (the title given to the head of the Reformed clergy in the city) as well as a Hebraist, author, and editor, who taught Paul Jung as his professor of Hebrew at Basel University. He was an early advocate of Zionism and was interested in the occult. Eight of Carl Jung's uncles were also clergymen.
Sources: en.wikipedia.org
==== 2010 kimchi ingredient price crisis ==== Due to heavy rainfall shortening the harvesting time for cabbage and other main ingredients for kimchi in 2010, the price of kimchi ingredients and kimchi itself rose greatly. Korean and international newspapers described the rise in prices as a national crisis. Some restaurants stopped offering kimchi as a free side dish, which The New York Times compared to an American hamburger restaurant no longer offering free ketchup. In response to the kimchi price crisis, the South Korean government announced the temporary reduction of tariffs on imported cabbage to coincide with the kimjang season.
The number of PPIs identified is usually low because of a high false negative rate; and, understates membrane proteins, for example. During his studies, Molecular biologist Anton Yuryev used yeast two-hybrid screening to identify novel protein interactions linking transcription with post‑transcriptional modification, demonstrating the utility of these methods for revealing functional, isoform‑specific PPIs. In initial studies that utilized Y2H, proper controls for false positives (e.g. when DB-X activates the reporter gene without the presence of AD-Y) were frequently not done, leading to a higher than normal false positive rate. An empirical framework must be implemented to control for these false positives. Limitations in lower coverage of membrane proteins have been overcoming by the emergence of yeast two-hybrid variants, such as the membrane yeast two-hybrid (MYTH) and the split-ubiquitin system, which are not limited to interactions that occur in the nucleus; and, the bacterial two-hybrid system, performed in bacteria;
== Areas of application and limits == First used in theoretical physics, the molecular dynamics method gained popularity in materials science soon afterward, and since the 1970s it has also been commonly used in biochemistry and biophysics. MD is frequently used to refine 3-dimensional structures of proteins and other macromolecules based on experimental constraints from X-ray crystallography or NMR spectroscopy. In physics, MD is used to examine the dynamics of atomic-level phenomena that cannot be observed directly, such as thin film growth and ion subplantation, and to examine the physical properties of nanotechnological devices that have not or cannot yet be created. In biophysics and structural biology, the method is frequently applied to study the motions of macromolecules such as proteins and nucleic acids, which can be useful for interpreting the results of certain biophysical experiments and for modeling interactions with other molecules, as in ligand docking. In principle, MD can be used for ab initio prediction of protein structure by simulating folding of the polypeptide chain from a random coil. MD can also be used to compute other thermodynamic properties such as drug solubilities and free energies of solvation including in polymers. The results of MD simulations can be tested through comparison to experiments that measure molecular dynamics, of which a popular method is NMR spectroscopy.
== R == Ronald T. Raines (born 1958), American chemist Adam Vladislavovich Rakovsky (1879–1941), Soviet physical chemist Venkatraman Ramakrishnan (born 1952), 2009 Nobel Prize in Chemistry William Ramsay (1852–1916), Scottish chemist, 1904 Nobel Prize in Chemistry C. N. R. Rao (born 1934), Indian chemist François-Marie Raoult (1830–1901), French chemist, known for Raoult's law Henry Rapoport (1918–2002), American chemist, UC Berkeley William Sage Rapson (1912–1999), South African chemist and co-author of Gold Usage Nil Ratan Dhar (1892–1986), Pioneering Indian soil chemist Ken Raymond (born 1942), American inorganic and bioinorganic chemist, UC Berkeley Prafulla Chandra Ray (1861–1944), Indian chemist Julius Rebek (born 1944), Hungarian American chemist Charles Lee Reese (1862–1940), American chemist and Chemical Director of DuPont Henri Victor Regnault (1810–1878), French chemist and physicist Tadeus Reichstein (1897–1996), chemist, 1950 Nobel Prize in Physiology or Medicine Oleg Reutov (1920-1998), soviet organic chemist Rhazes (Razi) (865–925), Persian physician, philosopher and alchemist Stuart A.
Sources: en.wikipedia.org
It is a laboratory-made peptide of forty-four amino acids whose sequence matches human growth hormone-releasing hormone, with a modified amino terminus. The modification is a short unsaturated fatty acid chain attached to the first residue. This change slows enzymatic breakdown and lengthens the time the peptide stays active in circulation.
The clinical program was designed around HIV-associated lipodystrophy, a condition in which fat accumulates abnormally around the internal organs. Trials enrolled that specific population, so the evidence base covers it rather than the general population. Regulators approved the drug for the studied indication only, and promotion outside it is not permitted.
Growth hormone therapy supplies the finished hormone directly, while this peptide acts upstream and asks the pituitary to secrete its own. That difference means the response depends on a functioning pituitary and on the body's normal feedback loops. It also means the circulating hormone profile is pulsatile rather than a flat, injected level.
It acts on the growth hormone–releasing hormone receptor, a Gs-coupled receptor found on pituitary somatotroph cells. Activation raises cAMP and prompts pulsatile hormone release.