The short version of TH9507 fits in a sentence. The long version — which is the one that helps — is below.
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Tesamorelin binds to growth hormone-releasing hormone receptors on somatotroph cells in the anterior pituitary. Receptor activation increases intracellular cyclic AMP and promotes synthesis and secretion of growth hormone. Because the peptide mimics endogenous GHRH, it amplifies the normal pulsatile release of growth hormone rather than providing exogenous growth hormone directly. This upstream action distinguishes tesamorelin from recombinant growth hormone preparations and from growth hormone secretagogues that act at different receptors.
Stimulated growth hormone release leads to hepatic production of insulin-like growth factor 1, a key mediator of many growth hormone effects. In clinical studies, tesamorelin increased IGF-1 levels in a dose-dependent manner, although the response varies among individuals. The drug's effect on visceral fat is thought to involve growth hormone-mediated lipolysis and altered adipocyte metabolism. Muscle mass and lean body mass have also been assessed as secondary outcomes, but changes are generally smaller and less consistent than fat reductions.
Development work on the compound, originally designated TH9507, focused on conditions in which reduced growth hormone signaling is thought to contribute to altered body composition. The United States Food and Drug Administration approved it in 2010 for the treatment of excess visceral abdominal fat in adults with human immunodeficiency virus infection and lipodystrophy. Later research examined other populations, including adults with mild cognitive impairment, where a large trial did not meet its primary endpoints. This mixed record illustrates how a single mechanism can produce clear effects in one setting and inconclusive results in another.
Several related peptides act on the same receptor, including sermorelin, a shorter GHRH fragment, and modified analogs such as CJC-1295 and modified GRF(1-29) that are common in research settings rather than approved products. Tesamorelin differs from growth hormone itself in that it acts upstream, prompting the pituitary to release the hormone through physiological signaling rather than supplying it directly. Terminology in the literature distinguishes GHRH analogs, growth hormone secretagogues, and recombinant growth hormone, although popular discussion often blurs these categories together. Precise naming matters when comparing study results.
Tesamorelin is a synthetic peptide of 44 amino acids that reproduces the sequence of human growth hormone-releasing hormone (GHRH) and carries a trans-3-hexenoyl group on its N-terminal tyrosine. That small fatty-acid modification blocks cleavage by dipeptidyl peptidase-4, the enzyme that rapidly degrades native GHRH in plasma. The result is a molecule with a longer circulating half-life than the natural hormone while retaining the same receptor target. It is supplied as a lyophilized powder for reconstitution and belongs to the broader class of GHRH analogs studied for effects on pituitary growth hormone secretion.
| Property | Value | Notes |
|---|---|---|
| Primary target | Growth hormone-releasing hormone receptor | Located on anterior pituitary somatotroph cells. |
| Receptor class | G protein-coupled receptor | Activation increases intracellular cyclic AMP. |
| Main downstream hormone | Growth hormone and insulin-like growth factor 1 | Growth hormone release precedes IGF-1 elevation. |
| Primary studied effect | Reduction in visceral adipose tissue | Measured by computed tomography in clinical trials. |
| Approximate half-life | 26–38 minutes after subcutaneous administration | Values vary by assay and study population. |
Lyophilized material is typically held under refrigeration between two and eight degrees Celsius, shielded from light and ambient moisture. Peptides of this size adsorb to glass and plastic, so working procedures often call for low-binding containers and as few transfers as possible. Absorbed water during weighing shifts the apparent mass of a sample, and controlling room humidity reduces that source of error. Once dissolved, solutions are kept cold and used within the interval printed on the accompanying label or certificate. Degradation accelerates markedly in dilute aqueous form.
Identity and purity are judged through a combination of chromatographic and mass spectrometric techniques. Reversed-phase high-performance liquid chromatography separates the intact peptide from truncated, oxidized, and deamidated variants, and the resulting peak-area percentages yield a purity figure. Electrospray ionization mass spectrometry confirms the expected molecular mass and can expose unanticipated modifications. Amino acid analysis and peptide mapping support sequence fidelity, while water content, pH, sterility, and bacterial endotoxin testing describe the physical and microbiological attributes of a finished lot.
Regulatory position depends on jurisdiction and on the form in which the material is sold. A branded product holds approval in the United States for a defined indication, and prescribing is confined to that label. Material marketed for laboratory research is not evaluated for human use and carries no such clearance. Independent verification therefore rests on certificates of analysis, third-party testing, and documented chain of custody. The substance also appears on the World Anti-Doping Agency prohibited list within the category covering growth hormone-releasing factors.
The hexenoyl cap slows the enzyme step that trims the amino terminus of native GHRH, the same step that shortens its active lifetime in circulation. As a result, the modified peptide persists longer in plasma than the unmodified hormone in side-by-side comparison. Receptor activity stays broadly comparable, because the added group sits away from the residues that contact the binding site. This combination, preserved receptor activity with reduced degradation, explains why the analog was developed instead of the native sequence.
Several compounds share the GHRH framework, including sermorelin, the shorter 1-29 fragment, and other analogs built on the full 1-44 chain. Naming follows a common convention: a stem that identifies the peptide plus a suffix marking analog status. Reports may describe tesamorelin by its sequence fragment, as a GHRH(1-44) analog, or by its amino-terminal modification. Indexing the compound therefore requires searching all of these forms, since some older literature predates the current international nonproprietary name.
Tesamorelin is a synthetic peptide built from 44 amino acids and classified with the growth hormone–releasing hormone family. Its sequence corresponds to the human GHRH(1-44) backbone, carrying one structural change at the amino terminus. That change is a trans-3-hexenoyl group placed where the natural peptide would have an unmodified end. The modification is the feature that separates the compound from the endogenous hormone in name, in stability, and in how it is handled in the laboratory.
Storage claims vary across suppliers, and published stability data for specific formulations are limited. Extrapolating from related peptides is common but not a substitute for direct measurement. For research use, documentation such as a certificate of analysis is often requested to confirm identity and purity. What constitutes an acceptable purity threshold depends on the intended application. Open questions remain about how temperature excursions during shipping affect long-term peptide integrity. Independent verification by an end user is not routinely reported.
Lyophilized tesamorelin is generally stored refrigerated at 2 to 8 degrees Celsius, protected from light and moisture. Peptides in this class are often kept frozen at minus 20 degrees Celsius for longer periods. Reconstituted solutions are typically used within a defined window because hydrolysis and oxidation proceed faster in liquid form. Container material and headspace also influence how long a preparation retains its expected profile. Specific stability figures depend on concentration and buffer composition.
Common analytical approaches include reversed-phase high-performance liquid chromatography for purity assessment and mass spectrometry for identity confirmation. Peptide mapping after enzymatic digestion can verify the expected sequence. Immunoassays may be used to measure the compound or its downstream markers, but they can cross-react with related peptides and require careful validation. Impurity profiles typically include truncated sequences, oxidized methionine residues, and residual solvents from synthesis. Each method reports a different property, so no single assay establishes overall quality.
Clinical interest in tesamorelin arose from the need to address visceral adiposity in people living with HIV. Antiretroviral therapy improved survival but was associated in some patients with central fat accumulation, altered lipid profiles, and metabolic complications. This condition, often called HIV-associated lipodystrophy, involves excess visceral adipose tissue that is difficult to manage through diet and exercise alone. Investigators evaluated tesamorelin because GHRH analogs can stimulate growth hormone secretion and influence fat distribution without direct liposuction or invasive procedures.
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.
=== Acral acanthotic anomaly === Acral acanthotic anomaly is a localized variant affecting the elbows, knees, knuckles and dorsal feet. It occurs in otherwise healthy individuals, and its etiology is unknown. It is not associated with internal disease.
Estradiol is known to correlate with aggression in male mice. Moreover, the conversion of testosterone to estradiol regulates male aggression in sparrows during breeding season. Rats who were given anabolic steroids that increase testosterone were also more physically aggressive to provocation as a result of "threat sensitivity". The relationship between testosterone and aggression may also function indirectly, as it has been proposed that testosterone does not amplify tendencies towards aggression, but rather amplifies whatever tendencies will allow an individual to maintain social status when challenged. In most animals, aggression is the means of maintaining social status. However, humans have multiple ways of obtaining status. This diversity could explain why some studies find a link between testosterone and pro-social behavior, if pro-social behavior is rewarded with social status. Thus the link between testosterone and aggression and violence is due to these being rewarded with social status. The relationship may also be one of a "permissive effect" whereby testosterone does elevate aggression levels, but only in the sense of allowing average aggression levels to be maintained; chemically or physically castrating the individual will reduce aggression levels (though not eliminate them) but the individual only needs a small-level of pre-castration testosterone to have aggression levels to return to normal, which they will remain at even if additional testosterone is added.
=== Elyzol dental gel - parodontitis === Camurus has partnered with Colgate-Palmolive for the marketing of their Elyzol dental gel for the treatment of parodontitis. Elyzol 25% dental gel contains metronidazole in the form of metronidazole benzoate as the active substance.
Insect burrow fossils can sometimes be distinguished from real egg fossils by the presence of "scratch marks" on their surface left by the insect during the burrow's original excavation. Fossil insect pupae can also resemble eggs. After death and burial, the decomposition of a deceased pupa would leave a gap in the sediment that could be filled with minerals carried by groundwater, forming an egg-like cast. These pseudo-eggs can be recognized by their small size (usually not much longer than a centimeter or two) and lack of an eggshell with its typical anatomy. Stones: The erosive effects of water can sometimes round rocks into egg-like shapes.
Sources: en.wikipedia.org
=== Books === Separation Processes (1971); 2nd edition (1980) Freeze Drying of Foods (1971) The University of California: Creating, Nurturing, and Maintaining Academic Quality in a Public University Setting (2018)
Border zones are areas near borders that have special restrictions on movement. Governments may forbid unauthorised entry to or exit from border zones and restrict property ownership in the area. The zones function as buffer zones, specifically monitored by border patrols, to prevent unauthorised cross-border travel. Border zones enable authorities to detain and prosecute individuals suspected of being or aiding undocumented migrants, smugglers, or spies without necessarily having to prove that the individuals in question actually engaged in the suspected unauthorised activity, since, as all unauthorised presence in the area is forbidden, the mere presence of an individual permits authorities to arrest them. Border zones between hostile states can be heavily militarised, with minefields, barbed wire, and watchtowers. Some border zones are designed to prevent illegal immigration or emigration and have few restrictions, but may operate checkpoints to verify immigration status. In most places, a border vista is usually included and/or required. In some nations, movement inside a border zone without a licence is an offence and will result in arrest. No probable cause is required as mere presence inside the zone is an offence, if it is intentional. Even with a license to enter, photography, making fires, and carrying of firearms and hunting may be prohibited. Examples of international border zones are the Border Security Zone of Russia and the Finnish border zone on the Finnish–Russian border.
passive transport The movement of a solute across a membrane by traveling down an electrochemical or concentration gradient, using only the energy stored in the gradient and not any energy from external sources. Contrast active transport.
Sources: en.wikipedia.org
For example, in Florida, a MLT may only perform highly complex testing while under the direct supervision of a clinical laboratory technologist, a clinical laboratory supervisor, or a clinical laboratory director. This may make it impractical for a MLT to lawfully work in a Florida blood bank. California has similar restrictions on MLTs. To accommodate California's restrictions, the American Association of Bioanalysts (AAB) developed a separate certification examination for California licensure. However, this exam does not include material covering the areas of immunohematology or microscopy. Although the typical entry-level academic requirement for most MLTs is an associate degree, a 60 credit certificate program exists through military training programs; such as the U.S. Army's 68K military occupational specialty. As in other countries, staffing shortages have become a major issue in many clinical laboratories in the United States. Due to several factors, including boomer retirement, and inadequate recruitment and retention efforts, the medical laboratory workforce is shrinking. For the decade 2010–2020, workforce needs are expected to grow by 13%. This translates into about 11,300 positions per year that will need to be filled, with only about 5000 new graduates per year coming out of various programs. It was estimated that the shortage of medical laboratory professionals would reach 98,700 in the U.S. by 2025.
=== Simultaneous cyclization/resin release === Small C-terminal cyclic moieties like γ-, δ-, and ε-lactams can be introduced in peptides synthesized on base-labile linkers by deprotecting the C-terminal amino acid bearing an amine on its side-chain and letting it cyclize, thereby releasing the peptide from the resin in the process.
A 2005 meta-analysis of drug company data found no evidence that SSRIs increased the risk of suicide; however, important protective or hazardous effects could not be excluded. A 2005 review observed that suicide attempts are increased in those who use SSRIs as compared to placebo and compared to therapeutic interventions other than tricyclic antidepressants. No difference risk of suicide attempts was detected between SSRIs versus tricyclic antidepressants. A 2006 review suggests that the widespread use of antidepressants in the new "SSRI-era" appears to have led to a highly significant decline in suicide rates in most countries with traditionally high baseline suicide rates. The decline is particularly striking for women who, compared with men, seek more help for depression. Recent clinical data on large samples in the US, too, have revealed a protective effect of antidepressants against suicide. A 2006 meta-analysis of randomized controlled trials suggests that SSRIs increase suicide ideation compared with placebo. However, the observational studies suggest that SSRIs did not increase suicide risk more than older antidepressants. The researchers stated that if SSRIs increase suicide risk in some patients, the number of additional deaths is small because ecological studies have generally found that suicide mortality has declined (or at least not increased) as SSRI use has increased. An additional meta-analysis by the FDA in 2006 found an age-related effect of SSRIs. Among adults younger than 25 years, results indicated that there was a higher risk for suicidal behavior.
== January 6, 1982 (Wednesday) == Speaking at the annual meeting of the American Association for the Advancement of Science at Washington, Dr. James Hansen, a climatologist for NASA's Goddard Institute of Space Studies warned that the increase of carbon dioxide and other chemicals (such as methane and nitrous oxide) in Earth's atmosphere would cause a substantial warming of the Earth's climate during the 1980s, sooner than predictions that global warming would not take place until the 21st century. Serial murderer William G. Bonin, a 34-year old truck driver charged with being the "Freeway Killer", was convicted on charges of torturing and murdering 10 young men and boys from May 1979 until his capture on June 12, 1980. He was acquitted of charges of killing two other victims. Initially, he had been linked by investigators to 21 homicides, and indicted for 12. Born: Eddie Redmayne, English stage and film actor, winner of the 2014 Academy Award for Best Actor for his portrayal of Stephen Hawking in The Theory of Everything; in Westminster, London Died: Shang Yue, 79, Chinese Marxist economic historian and fiction author who was purged in 1958 but rehabilitated in 1976 Bill Crawford, 68, American editorial cartoonist
Sources: en.wikipedia.org
It targets the growth hormone-releasing hormone receptor on pituitary somatotroph cells. Binding stimulates cyclic AMP signaling and growth hormone secretion. This is the same receptor used by endogenous GHRH.
It does not act directly on adipose tissue as a primary mechanism. Instead, it increases endogenous growth hormone, which then influences lipolysis and fat distribution. The reduction in visceral fat is an indirect pharmacodynamic effect.
Tesamorelin acts upstream at the pituitary to amplify natural pulsatile growth hormone release. Growth hormone injections provide exogenous hormone and bypass pituitary regulation. The two approaches therefore differ in feedback control and hormonal dynamics.
It is a synthetic peptide built from 44 amino acids arranged in the same order as human growth hormone-releasing hormone. A short fatty-acid chain, described as a trans-3-hexenoyl group, is attached to the first amino acid. The finished molecule is formulated as a sterile powder that is dissolved before use.