pituitary axis 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.
Updated 2026-03-20. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Interest in this peptide developed because native GHRH has a short circulating lifetime. The N-terminal modification slows cleavage by dipeptidyl peptidase IV, an enzyme that removes the first two residues of many peptides and terminates their activity. Slower degradation means a longer window of receptor stimulation per administration. This design logic parallels other modified peptide hormones, where a small chemical change at a vulnerable site yields a more durable molecule without altering the core mechanism of action.
The peptide is synthesized chemically rather than extracted from biological sources. Solid-phase synthesis builds the chain from the C-terminus toward the N-terminus, after which the hexenoyl group is attached. Purity is typically assessed by high-performance liquid chromatography, and identity is confirmed by mass spectrometry. Regulatory review of the finished product focuses on these analytical controls, since small deviations in sequence or modification can change biological activity. Questions about long-term effects on the pituitary axis remain areas of continued investigation.
| Property | Value | Notes |
|---|---|---|
| Drug class | Peptide hormone analog | Acts at the growth hormone-releasing hormone receptor |
| Receptor | Growth hormone-releasing hormone receptor | G protein-coupled; raises cyclic AMP in somatotrophs |
| Key mediator | Insulin-like growth factor 1 | Increases with repeated administration |
| Main studied population | Adults with HIV-associated lipodystrophy | Trials measured visceral adipose tissue by imaging |
| Route | Subcutaneous injection | Given once daily in clinical use |
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.
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.
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.
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.
Metabolic interest in this compound centers on fat distribution rather than on hormone levels alone. Imaging trials in adults with excess abdominal fat report reductions in visceral adipose tissue, while subcutaneous depots change comparatively little. Growth hormone and IGF-1 are presumed to carry the effect, but the separate contribution of each is not firmly established. Whether these changes persist after treatment stops, and whether they alter longer-term health outcomes, remain open questions that published work does not answer consistently.
Tesamorelin is a synthetic peptide of forty-four amino acids whose sequence reproduces human growth hormone-releasing hormone. Its distinguishing feature sits at the amino terminus, where a trans-3-hexenoyl group replaces the free amine. That acylation slows cleavage by dipeptidyl peptidase IV, an enzyme that otherwise removes the first two residues and inactivates the natural hormone quickly. The modified peptide therefore persists longer in circulation while keeping the same receptor target. It is handled as a lyophilized solid and dissolved shortly before use.
The first of these incursions occurred when a fleet of these Crusaders was invited by the Portuguese king Afonso I Henriques to conquer the city of Lisbon in 1142. Although this Siege of Lisbon (1142) was a failure it created a precedent for their involvement in Portugal. So in 1147 when another group of Norman and other groups of crusaders from Northern Europe arrived in Porto on their way to join the crusading forces of the Second Crusade, the Bishop of Porto and later Afonso Henriques according to De expugnatione Lyxbonensi convinced them to help with the siege of Lisbon. This time the city was captured and according to the arrangement agreed upon with the Portuguese monarch many of them settled in the newly sacked city. The following year the remainder of the crusading fleet, including a substantial number of Anglo-Normans, was invited by the count of Barcelona, Ramon Berenguer IV, to participate in the siege of Tortosa (1148). Again the Normans were rewarded with lands in the newly conquered frontier city.
Hydrogen selenide is an extremely toxic, corrosive gas. Selenium also occurs in organic compounds, such as dimethyl selenide, selenomethionine, selenocysteine and methylselenocysteine, all of which have high bioavailability and are toxic in large doses. The Occupational Safety and Health Administration (OSHA) has set the legal limit (permissible exposure limit) for selenium in the workplace at 0.2 mg/m3 over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set a Recommended exposure limit (REL) of 0.2 mg/m3 over an 8-hour workday. At levels of 1 mg/m3, selenium is immediately dangerous to life and health.
== Pharmacology == Pimecrolimus is an ascomycin macrolactam derivative. It has been shown in vitro that pimecrolimus binds to FKBP1A and also inhibits calcineurin. Thus pimecrolimus inhibits T-cell activation by inhibiting the synthesis and release of cytokines from T-cells. Pimecrolimus also prevents the release of inflammatory cytokines and mediators from mast cells. Pimecrolimus, like tacrolimus, belongs to the ascomycin class of macrolactam immunosuppressives, acting by the inhibition of T-cell activation by the calcineurin pathway and inhibition of the release of numerous inflammatory cytokines, thereby preventing the cascade of immune and inflammatory signals. Pimecrolimus has a similar mode of action to that of tacrolimus but is more selective, with no effect on dendritic (Langerhans) cells. It has lower permeation through the skin than topical steroids or topical tacrolimus although they have not been compared with each other for their permeation ability through mucosa. In addition, in contrast with topical steroids, pimecrolimus does not produce skin atrophy.
A hematoma, also spelled haematoma, or blood suffusion is a localized bleeding outside of blood vessels, due to either disease or trauma including injury or surgery and may involve blood continuing to seep from broken capillaries. A hematoma is benign and is initially in liquid form spread among the tissues including in sacs between tissues where it may coagulate and solidify before blood is reabsorbed into blood vessels. An ecchymosis is a hematoma of the skin larger than 10 mm. They may occur among and or within many areas such as skin and other organs, connective tissues, bone, joints and muscle. A collection of blood (or even a hemorrhage) may be aggravated by anticoagulant medication (blood thinner). Blood seepage and collection of blood may occur if heparin is given via an intramuscular route; to avoid this, heparin must be given intravenously or subcutaneously.
Sources: en.wikipedia.org
Architecturally, all Chipotle restaurants are built using most of the same material finishes (plywood, corrugated metal, stainless steel, exposed ductwork), although each store is unique. The interiors have been described as having an "industrial, sheet metal look". Chipotle has built restaurants using white ceramic tile instead of stainless steel. It costs the company approximately $850,000 to open a new restaurant. When the first Chipotle opened, Steve Ells asked his friend, sculptor Bruce Gueswel, to design the chairs and a styled Mayan king whose face was loosely based on that of civil rights movement leader Martin Luther King Jr., a personal inspiration of Gueswel, for the restaurant. Both items were made from wood and metal. Gueswel has continued to design and build the art and chairs for all subsequent Chipotle restaurants. Most Chipotle locations display a photograph of the original restaurant, which is near the University of Denver campus on Evans Avenue. Instead of a photograph of itself, the original location has a photograph of the Dolly Madison Ice Cream that previously occupied the location. In 2010, Chipotle began opening smaller concept locations that have lower costs of development and occupancy. Chipotle has made arrangements to add solar panels to 75 of its restaurants. Chipotle was the defendant in a lawsuit for failure to comply with the Americans with Disabilities Act (ADA). Maurizio Antoninetti, a customer who used a wheelchair, claimed he was denied the "Chipotle Experience", because he was unable to see the food preparation.
==== United nations ==== The UN Commission on Narcotic Drugs added 2C-B to Schedule II of the Convention on Psychotropic Substances in March 2001. 2C-B is a scheduled drug in most jurisdictions. The following is a partial list of territories where the substance has been scheduled.
Adenosine triphosphate (ATP) is a nucleoside triphosphate that provides free energy of approximately 58 kJ/mol (0.6 eV) to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis. Found in all known forms of life, it is often referred to as the "molecular unit of currency" for intracellular energy transfer. When consumed in a metabolic process, ATP converts either to adenosine diphosphate (ADP) or to adenosine monophosphate (AMP). Other processes, such as oxidative phosphorylation or substrate-level phosphorylation, regenerate ATP. ATP is also a precursor to DNA and RNA, and is used as a coenzyme. Daily, an average adult human recycles through synthesis and hydrolysis around 50 kilograms of ATP (about 100 moles). From the perspective of biochemistry, ATP is classified as a nucleoside triphosphate, which indicates that it consists of three components: a nitrogenous base (adenine), the sugar ribose, and the triphosphate.
Assessment — This step involves collecting data pertinent to the patient, including nutrition-related History, anthropometric Measurements, biochemical data, nutrition-focused physical findings, client history and comparative standards. Diagnosis — Based on the assessment data collected, a nutrition problem may be diagnosed. Causes and contributing factors are identified. Intervention — Based on the nutrition diagnosis, problems are addressed that aid in alleviation of the diagnosis’ signs and symptoms. Activities are constructed to enable the patient to work towards objectives set for them by themselves and their nutrition professional. Monitoring/Evaluation — Progress made on goals and/or expected outcomes is tracked to ensure that nutrition problems are being addressed; adjustments in the Intervention step are made according to progress.
Loading buffers often contain anionic dyes that are visible under the visible light spectrum, and are added to the gel before the nucleic acid. Tracking dyes should not be reactive so as not to alter the sample, and move down the gel with the DNA or RNA sample. Commonly used color markers include Bromophenol blue, Cresol Red, Orange G and Xylene cyanol. Xylene and bromophenol blue are the most commonly used dyes. Generally speaking, Orange G migrates faster than bromophenol blue, which migrates faster than xylene cyanol, but the apparent "sizes" of these dyes (compared to DNA molecules) varies with the concentration of agarose and the buffer system used. For instance, in a 1% agarose gel made in TAE buffer (Tris-acetate-EDTA), xylene cyanol migrates at the speed of a 3000 base pair (bp) molecule of DNA and bromophenol blue migrates at 400 bp. However, in a 1% gel made in TBE buffer (Tris-borate-EDTA), they migrate at 2000 bp and 250 bp respectively.
Sources: en.wikipedia.org
== Other activities == Guillaume and his wife Donna were co-founders of Artists for a Free South Africa (later renamed Artists for a New South Africa) in 1989, along with a number of other Hollywood actors, including Alfre Woodard.
The International Cryosphere Climate Initiative (ICCI) publishes its annual State of the Cryosphere Report. It warns of rapid, irreversible sea-level rise from Earth's ice sheets, which could potentially reach 12–20 metres in the coming centuries. 17 November – The global average temperature temporarily exceeds 2 °C above the pre-industrial average for the first time in recorded history. 20 November – A study of censorship in science finds it to be often driven by scientists themselves, motivated by prosocial concerns or reputation protection. 22 November – An autonomous excavator is demonstrated. Using sensors, the machine can generate 3D maps of a construction site, localising individual blocks and stones in order to build a wall. 23 November Astrophysicists report the detection of "Amaterasu", the second highest-energy cosmic ray ever known, second only to the Oh-My-God particle of 1991. Amaterasu originated from the Local Void and its energy exceeded 240 exa-electron volts (EeV). Researchers report the deep learning-based discovery of nearly 200 functionally diverse natural machineries for CRISPR gene editing. 26 November – Astronomers report evidence, for the first time, of an overmassive black hole galaxy (O.B.G.), the result of "heavy black hole seed formation from direct collapse", an alternative way of producing a black hole other than the collapse of a dead star. This discovery was found in studies of UHZ1, a very early galaxy containing a quasar, by the Chandra X-ray Observatory and James Webb Space Telescope.
=== Bone mineral density === Bone mineral density (BMD) is a measure commonly used to quantify bone health. A lower BMD value indicates an increased risk of an osteoporosis or a fracture. There is a large range of factors influencing BMD. Protein consumption has shown to be beneficial for bone density by providing amino acid substrates necessary for bone matrix formation. It is also thought that blood concentration of the bone formation stimulant, Insulin-like Growth Factor-I (IGF-I), is increased from high protein consumption and parathyroid hormone (PTH), a bone resorption stimulant, is decreased. Although protein has shown to be beneficial for increasing bone mass, or bone mineral density, there is no significant association between protein intake and fracture incidence. In other words, a low BMD can be predictive of osteoporosis and increased fracture risk, but a higher BMD does not necessarily mean better bone health. High BMD is also correlated with other health issues. For example, a higher BMD has also been associated with increased risk of breast cancer.
Most photosynthetic organisms are photoautotrophs, which means that they are able to synthesize food directly from carbon dioxide and water using energy from light. However, not all organisms use carbon dioxide as a source of carbon atoms to carry out photosynthesis; photoheterotrophs use organic compounds, rather than carbon dioxide, as a source of carbon. In plants, algae, and cyanobacteria, photosynthesis releases oxygen. This oxygenic photosynthesis is by far the most common type of photosynthesis used by living organisms. Some shade-loving plants (sciophytes) produce such low levels of oxygen during photosynthesis that they use all of it themselves instead of releasing it to the atmosphere. Although there are some differences between oxygenic photosynthesis in plants, algae, and cyanobacteria, the overall process is quite similar in these organisms. There are also many varieties of anoxygenic photosynthesis, used mostly by bacteria, which consume carbon dioxide but do not release oxygen or which produce elemental sulfur instead of molecular oxygen. Carbon dioxide is converted into sugars in a process called carbon fixation; photosynthesis captures energy from sunlight to convert carbon dioxide into carbohydrates. Carbon fixation is an endothermic redox reaction. In general outline, photosynthesis is the opposite of cellular respiration: while photosynthesis is a process of reduction of carbon dioxide to carbohydrates, cellular respiration is the oxidation of carbohydrates or other nutrients to carbon dioxide.
The 1980s brought early radioligand studies for neuroendocrine tumors (NETs) which continued into the early 2000s. In 2017 the European Union (EU) approved the use of radioligand therapy for NETs with the U.S. following close behind in 2018.
Sources: en.wikipedia.org
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.
Administered growth hormone supplies the hormone directly, while this peptide acts upstream by prompting the pituitary to release it. The indirect route preserves pulsatile secretion and some endogenous feedback, which changes the hormone and IGF-1 profile observed after treatment.
Reductions in visceral adipose tissue appear consistently in randomized trials of the approved population. Effects on peripheral fat, cardiovascular outcomes, and use outside that population are less well established.
It shares the 44-residue sequence of human GHRH but carries an added trans-3-hexenoyl group at its N-terminus. That addition does not occur in the natural hormone and serves mainly to resist enzymatic breakdown. The receptor target and signaling pathway remain the same.