TH9507 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-06-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
Clinical investigation has focused on HIV-associated lipodystrophy, a condition in which antiretroviral therapy contributes to abnormal fat distribution. Excess visceral adipose tissue accumulates in the abdomen while peripheral fat may be lost. Tesamorelin was evaluated for reducing this visceral fat depot, with trials measuring changes in abdominal fat by imaging rather than by body weight alone. The rationale rests on the known lipolytic effects of growth hormone. Effects on visceral fat are documented, while long-term outcomes regarding cardiovascular risk remain less clearly established.
Tesamorelin is a synthetic peptide analog of growth hormone-releasing hormone, composed of 44 amino acids. It was designed to retain the biological activity of the native hormone while resisting rapid enzymatic degradation. The compound is classified as a growth hormone secretagogue and belongs to the broader family of hypothalamic releasing factors. In research and clinical settings, it is studied for its ability to stimulate pituitary growth hormone release. Its structure includes a modification at the N-terminus that contributes to an extended half-life relative to native growth hormone-releasing hormone.
| Property | Value | Notes |
|---|---|---|
| Physical form | Lyophilized powder | Requires reconstitution before use |
| Solubility | Soluble in water | Also dissolves in aqueous buffers |
| Storage, powder | 2 to 8 degrees Celsius | Protect from light and moisture |
| Storage, solution | Refrigerated, short term | Use promptly after reconstitution |
| Common assays | Reversed-phase HPLC and mass spectrometry | Purity and identity respectively |
Assays for these markers differ in calibration and antibody specificity, so results from different platforms are not always interchangeable. Reported values can shift when a laboratory changes method, even without any biological change. Studies that span long periods or multiple sites often need cross-validation of assays. This methodological variability is a recognized limitation when comparing findings across published reports, and it remains a topic of ongoing standardization work.
Measuring the effect of a growth hormone-releasing hormone analogue requires markers that reflect pituitary output rather than the peptide itself. The two most frequently used are growth hormone and insulin-like growth factor 1. Growth hormone fluctuates sharply across the day and responds to sleep, stress, and meals, so isolated readings can be difficult to interpret. Insulin-like growth factor 1 changes more slowly and is often treated as the more stable integrated marker of axis activity.
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.
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.
研究用与临床用材料的标准并不相同。质量控制通常覆盖纯度、残留溶剂、反离子含量、微生物限度与内毒素水平，各项均有对应检测方法。随货文件应包含批号、检测项目、方法与结果，使数据可以追溯。核验时应关注纯度是否按主峰面积计算、杂质是否已定性、方法是否经过验证，这些信息决定结果能否被外部重复。
纯度与身份确认依赖色谱与质谱的组合。反相高效液相色谱在 214 nm 紫外检测下分离主峰与相关杂质，给出纯度百分比与保留时间；电喷雾或基质辅助激光解吸电离质谱提供分子量，用于确认 N 端修饰是否完整。序列层面可通过肽图或氨基酸分析验证。含量测定常用紫外吸收法或氮元素分析，不同方法之间需要做交叉校验。
冻干粉末一般在 -20°C 或更低温度、干燥避光条件下保存，可维持较长时间的稳定。复溶后稳定性明显下降，溶液中的肽链易发生水解、氧化与聚集，通常需冷藏并在短期内用完。反复冻融会加速聚集与降解，建议分装后单次使用。缓冲体系的 pH 与离子强度同样影响聚集速率，需要按具体实验条件验证。
=== Measuring the rate of nucleation === As of 2014, the classical nucleation theory explained that the nucleation rate will correspond to the driving force. One method for measuring the nucleation rate is through the induction time method. This process uses the stochastic nature of nucleation and determines the rate of nucleation by analysis of the time between constant supersaturation and when crystals are first detected. Another method includes the probability distribution model, analogous to the methods used to study supercooled liquids, where the probability of finding at least one nucleus at a given time is derived. As of 2019, the early stages of nucleation and the rates associated with nucleation were modelled through multiscale computational modeling. This included exploration into an improved kinetic rate equation model and density function studies using the phase-field crystal model.
Research is being carried out on the use of stem cells for the generation of an artificial liver. Scientific and medical works about liver regeneration often refer to the Greek Titan Prometheus who was chained to a rock in the Caucasus where, each day, his liver was devoured by an eagle, only to grow back each night. The myth suggests the ancient Greeks may have known about the liver's remarkable capacity for self-repair.
The Dorothy Hodgkin Quarter, a student accommodation block at Somerville, is named after Hodgkin. British commemorative stamps - Hodgkin was one of five 'Women of Achievement' selected for a set issued in August 1996. The others were Marea Hartman (sports administrator), Margot Fonteyn (ballerina/choreographer), Elisabeth Frink (sculptor) & Daphne du Maurier (writer). All except Hodgkin were Dames Commander of the Order of the British Empire (DBEs). In 2010, during the 350th anniversary of the founding of the Royal Society, Hodgkin was the only woman in a set of stamps celebrating ten of the Society's most illustrious members, taking her place alongside Isaac Newton, Edward Jenner, Joseph Lister, Benjamin Franklin, Charles Babbage, Robert Boyle, Ernest Rutherford, Nicholas Shackleton and Alfred Russel Wallace. The Royal Society awards the Dorothy Hodgkin Fellowship (named in her honour) "for outstanding scientists at an early stage of their research career who require a flexible working pattern due to personal circumstances, such as parenting or caring responsibilities or health-related reasons." The Council offices in the London Borough of Hackney and buildings at University of York, Bristol University and Keele University are named after her, as is the science block at Sir John Leman High School, her former school. In 2012, Hodgkin was featured in the BBC Radio 4 series The New Elizabethans to mark the diamond Jubilee of Queen Elizabeth II.
Following Germany's surrender, the 82nd Airborne Division entered Berlin for occupation duty, replacing the 2nd Armored Division in August 1945. The division was relieved by the 78th Infantry Division early in November 1945. While in Berlin, General George S. Patton was so impressed with the 82nd's "honor guard" that he said, "In all my years in the Army and all the honor guards I have ever seen, the 82nd's honor guard is undoubtedly the best." Hence the "All-American" became also known as "America's Guard of Honor". The war ended before their scheduled participation in the Allied invasion of Japan, Operation Downfall.
Temperatures in the tank were off the scale beyond 25 °C (77 °F), and the pressure in the tank was indicated at 280 kilopascals (40 psi). One employee witnessed a concrete slab above tank E610 crack as the emergency relief valve burst open, and pressure in the tank continued to increase to 380 kilopascals (55 psi), despite atmospheric venting of toxic MIC gas having begun. Direct atmospheric venting should have been prevented or at least partially mitigated by at least three safety devices which were malfunctioning, not in use, insufficiently sized, or otherwise rendered inoperable:
Sources: en.wikipedia.org
The PPII helix is defined by (φ,ψ) backbone dihedral angles of roughly (-75°, 150°) and trans isomers of the peptide bonds. The rotation angle Ω per residue of any polypeptide helix with trans isomers is given by the equation
=== Ireland === Nando's was first established in Ireland in 2008. The company opened its flagship restaurant on St Andrew Street in the city centre of Dublin in November 2011, employing 60 staff members to manage a 3,800 square feet (350 m2) space spread over two floors. As of August 2021, they have expanded to a total of 14 outlets in Ireland, with nine in Dublin, two in Cork, one in Newbridge, one in Limerick and one in Galway.
Open to people of good moral character of Polish, Lithuanian, or Slavic descent and of the Roman Catholic, Byzantine Catholic or Greek Catholic Church or those married to one of the acceptable ethics and a member of the approved churches. Honorary membership is given to those who rendered a great service to the Association, Catholicism, the United States, or mankind in general. The minimum age is 15, though juvenile insurance/membership was available. In 1967 it had 24,500 members in 1979 16,000 in 105 groups. No ritual, but there is an oath. Offers scholarships, organizes folk dances, polka and Halloween parties, etc. Involved with the Catholic church. Patron saint is St. John Cantius, holds Masses and organized a pilgrimage to the National Shrine of Our Lady of Czestochowa in Doylestown, Pennsylvania. Polish Falcons of America Polish National Alliance of Brooklyn - Founded in 1903. Despite the name, it had members and was licensed to sell insurance in Connecticut, Michigan, Minnesota, New Jersey, and New York. Absorbed Polish American Workmen Aid Fund in 1960. Had 21,413 in 1965, approximately 12,000 in 1979 and 11,135 in 1995. Had 155 lodges in 1972, 87 in 1978. Offers Masses to its members, yearly grants to the Catholic Foundation and theological seminaries. Polish National Alliance Polish National Union (Sponjnia - Founded in February 1908 in the parish hall of St. Stanislaus Cathedral, in Scranton, Pennsylvania. Received charter by the end of the year. Women's lodges were authorized in 1909. Had difficulty retaining membership because it was actuarially unsound.
== Genetic counseling == Genetic counseling is the process of providing information about genetic conditions, diagnostic testing, and risks in other family members, within the framework of nondirective counseling. Genetic counselors are non-physician members of the medical genetics team who specialize in family risk assessment and counseling of patients regarding genetic disorders. The precise role of the genetic counselor varies somewhat depending on the disorder. When working alongside geneticists, genetic counselors normally specialize in pediatric genetics which focuses on developmental abnormalities present in newborns, infants or children. The major goal of pediatric counseling is attempting to explain the genetic basis behind the child's developmental concerns in a compassionate and articulated manner that allows the potentially distressed or frustrated parents to easily understand the information. As well, genetic counselors normally take a family pedigree, which summarizes the medical history of the patient's family. This then aids the clinical geneticist in the differential diagnosis process and help determine which further steps should be taken to help the patient.
=== Pharmacology applications === The development of NanoSIMS for organo-metallic drugs paved the way for exploring the distribution of biologically active molecules at the subcellular level. Legin et al. combined NanoSIMS with fluorescence confocal laser scanning microscopy to characterize the subcellular distribution of 15N isotopically labeled Pt-bearing cisplatin in human colon cancer cells. Cisplatin appears in the targeted nucleus of the colon cancer cells. 15N and Pt are separated showing subcellular metabolism is in the path of action. The internalization of amiodarone into the lysosomes of macrophages is illustrated in Jiang et al. Thanks to low detection limit, two iodine atoms of 127I in amiodarone molecule enables a label-free imaging by NanoSIMS. Iodine and phosphorus imaging along with plotting the intensity of 127I− vs 31P− indicated a linear relationship between the amount of iodine and phospholipids. These results disclose evidence of amiodarone-induced phospholipidosis. He et al. visualized the distribution of therapeutic antisense oligonucleotides labelled with bromine (Br-ASO) in some varieties of cultured cells and importantly mouse tissues (heart, kidney, and Liver) using NanoSIMS data combined with back scattered electron microscopy. They demonstrated that phosphorothioate ASOs associate with filopodia and the inner nuclear membrane of cells. They also documented essential cellular and subcellular heterogeneity in ASO distribution in the mouse tissues. Becquart et al.
Sources: en.wikipedia.org
== See also == Ergine (lysergic acid amide; LSA; lysergamide) Aztec use of entheogens § Ololiuqui and Tlitliltzin Morning glory § Chemistry and ethnobotany List of entheogens List of psychoactive plants
The current epidemic of obesity and eating disorders undermines these theories. The set point theories of hunger and eating are inconsistent with basic evolutionary pressures related to hunger and eating as they are currently understood. Major predictions of the set point theories of hunger and eating have not been confirmed. They fail to recognize other psychological and social influences on hunger and eating.
=== Reversed-phase chromatography === A popular stationary phase is an octadecyl carbon chain (C18)-bonded silica (USP classification L1). Such materials are produced by reaction of silica gel with trimethoxyoctadecylsilane. The individual links involve silanol groups displacing the methoxy groups, forming an Si-O-Si bonds. This reaction changes the hydrophilic silanol groups into hydrophobic coatings. Other silanizing groups install C8-bonded silica (L7), pure silica (L3), cyano-bonded silica (L10) and phenyl-bonded silica (L11). Note that C18, C8 and phenyl are dedicated reversed-phase resins, while cyano columns can be used in a reversed-phase mode depending on analyte and mobile phase conditions.
Semmelweis, who in the 1840s formulated his rules for handwashing in the hospital, prior to the advent of germ theory, attributed disease to "decomposing animal organic matter". His ideas were rejected and his book on the topic condemned by the medical community. After Lister, however, doctors started sanitising their hands in the 1870s. Robert Koch, a pioneer in medical microbiology, worked on cholera, anthrax and tuberculosis. In his research into tuberculosis, Koch finally proved the germ theory, for which he received a Nobel Prize in 1905. In Koch's postulates, he set out criteria to test if an organism is the cause of a disease, and these postulates are still used today. Ferdinand Cohn is said to be a founder of bacteriology, studying bacteria from 1870. Cohn was the first to classify bacteria based on their morphology. Though it was known in the nineteenth century that bacteria are the cause of many diseases, no effective antibacterial treatments were available. In 1910, Paul Ehrlich developed the first antibiotic, by changing dyes that selectively stained Treponema pallidum—the spirochaete that causes syphilis—into compounds that selectively killed the pathogen. Ehrlich, who had been awarded a 1908 Nobel Prize for his work on immunology, pioneered the use of stains to detect and identify bacteria, with his work being the basis of the Gram stain and the Ziehl–Neelsen stain. A major step forward in the study of bacteria came in 1977 when Carl Woese recognised that archaea have a separate line of evolutionary descent from bacteria.
A 2014 study suggests that bromine (in the form of bromide ion) is a necessary cofactor in the biosynthesis of collagen IV, making the element essential to basement membrane architecture and tissue development in animals. Nevertheless, no clear deprivation symptoms or syndromes have been documented in mammals. In other biological functions, bromine may be non-essential but still beneficial when it takes the place of chlorine. For example, in the presence of hydrogen peroxide, H2O2, formed by the eosinophil, and either chloride, iodide, thiocyanate, or bromide ions, eosinophil peroxidase provides a potent mechanism by which eosinophils kill multicellular parasites (such as the nematode worms involved in filariasis) and some bacteria (such as tuberculosis bacteria). Eosinophil peroxidase is a haloperoxidase that preferentially uses bromide over chloride for this purpose, generating hypobromite (hypobromous acid), although the use of chloride is possible.
Sources: en.wikipedia.org
Refrigeration between 2 and 8 degrees Celsius with protection from light is the common recommendation. Many laboratories choose frozen storage at minus 20 degrees Celsius when the material will not be used soon. Repeated temperature cycling is generally avoided.
Mass spectrometry gives the observed mass, which is compared against the value calculated from the sequence. Peptide mapping after digestion provides a second, sequence-level check. Chromatographic retention alone is not sufficient for identity.
Antibodies raised against one GHRH-related peptide may bind other members of the same family. That cross-reactivity inflates or distorts measured concentrations. Assay validation with defined standards is therefore necessary before results are interpreted.
It is a synthetic analog of growth hormone-releasing hormone, a hypothalamic peptide. It functions as a growth hormone secretagogue acting at pituitary receptors. The classification separates it from direct growth hormone products.