Phase 3 trial raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-02-13. Anything still debated is marked as such rather than presented as settled.
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.
Binding of tesamorelin to GHRH receptors on pituitary somatotroph cells triggers cyclic AMP signaling and the release of growth hormone into circulation. Because the peptide acts upstream of the growth hormone axis, its effects are partly mediated by hepatic insulin-like growth factor 1 (IGF-1) production. The pulsatile character of endogenous growth hormone secretion is preserved rather than replaced. Whether amplified signaling produces effects beyond those of native GHRH remains an area of ongoing investigation.
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.
监管记录显示，特沙莫瑞林于 2010 年在美国首次获得批准，用于人类免疫缺陷病毒感染相关的脂肪营养不良患者。批准依据来自降低内脏脂肪的临床试验，而非体重或瘦体重的普遍改善。后续出现了不同制剂版本，但其核心适应症保持一致。关于长期心血管结局和死亡率影响，现有证据仍不充分。
在临床研究之外，特沙莫瑞林常被讨论为生长激素分泌促进剂，但这一说法需要限定。它并不等同于生长激素本身，也不属于普通减重药物。部分研究关注其减少腹部脂肪和改善脂质谱的潜力，另一些研究则关注胰岛素抵抗和 IGF-1 升高等信号。这些效应的临床意义仍在评估中，尚未形成统一结论。
特沙莫瑞林是一种合成肽，其序列与人生长激素释放激素的 44 个氨基酸形式相关。它在 N 端带有反式-3-己烯酰基修饰，这一改动可减缓二肽基肽酶 IV 的降解。该化合物属于生长激素释放激素受体激动剂，可刺激垂体释放生长激素。研究文献通常将其归入合成肽类药物，而非小分子化合物。
| 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 |
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.
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.
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.
After starting a collaboration on heart applications with Robert Weiss at Johns Hopkins, Paul returned to Johns Hopkins University in 1994, as Professor and Director of the MR Research Division. He worked on the application of MRS to measure cardiac energy metabolism in the healthy and ischemic human heart, finding that creatine kinase energy supply was compromised in heart failure, that it declined in relation to cardiac mechanical work and that it was an independent predictor of cardiac events and death. More recent work showed that a neural network based on cardiac CK metabolic parameters alone could differentiate a number of different types of cardiac disease and severity with potentially clinically useful accuracy. Paul has also worked on developing interventional MRI technology, specifically, tiny MRI detector coils that can be built into catheters to perform high resolution imaging of vessel wall and surrounding tissues; accelerated to perform real-time high resolution 'MRI endoscopy'; and potentially combined with extra-vascular therapy delivery. The earlier work led to the founding of the SurgiVision Inc start-up noted at top, and later, the development of MRI-safe implantable lead technology (licensed and sold as Avista™ by Boston Scientific Inc).
=== Pharmacodynamics and pharmacokinetics === The addition of sulbactam to ampicillin enhances the effects of ampicillin. This increases the antimicrobial activity by 4- to 32-fold when compared to ampicillin alone. Ampicillin is a time-dependent antibiotic. Its bacterial killing is largely related to the time that drug concentrations in the body remain above the minimum inhibitory concentration (MIC). The duration of exposure will thus correspond to how much bacterial killing will occur. Various studies have shown that, for maximum bacterial killing, drug concentrations must be above the MIC for 50-60% of the time for the penicillin group of antibiotics. This means that longer durations of adequate concentrations are more likely to produce therapeutic success. However, when ampicillin is given in combination with sulbactam, regrowth of bacteria has been seen when sulbactam levels fall below certain concentrations. As with many other antibiotics, under-dosing of ampicillin/sulbactam may lead to resistance. Ampicillin/sulbactam has poor absorption when given orally. The two drugs have similar pharmacokinetic profiles that appear unchanged when given together. Ampicillin and sulbactam are both hydrophilic substances and have a volume of distribution (Vd) similar to the volume of extra-cellular body water. The volume that the drug distributes throughout in healthy patients is approximately 0.2 liters per kilogram of body weight. Patients on hemodialysis, elderly patients, and pediatric patients have shown a slightly increased volume of distribution.
Their study analysed five loci from 149 species. The phylogeny identified monophyletic versus polyphyletic genera. For instance, Bacidia in its broad traditional sense was polyphyletic, as was Toninia and a few others. Character mapping suggested an ancestor with a filamentous thallus in moist shade and multi-septate spores. Traits like the phyllopsoroid growth form (tiny leaf-like squamules as in genus Phyllopsora) were found to have evolved repeatedly within the family. Guided by these results, the authors synonymized six genera, resurrected four, and described two new ones, publishing 49 new combinations. In total, they published 49 new combinations to assign species to the appropriate genus under the new scheme. The redefined family now comprises 39 genera grouped into five well-supported clades (sometimes informally called the Bacidia group, Ramalina group, named after representative genera). Aligning genera with clades improves identifications because traits now track evolutionary affinity. These large‑scale revisions exemplify the kind of evidence‑rich approach—multiple loci, morphology and broad sampling—that Nimis had earlier promoted as a prerequisite for accepting new genera. In both cases, an evidence-rich, collaborative approach (combining multiple DNA markers with morphology and broad sampling) led to a more natural and stable classification.
== Early years == Nickson is the daughter of a British father and a Chinese mother. After her father's death in an automobile accident when she was six, Nickson and her mother had to live in a house with three other families. Her grandmother often watched Chinese operas on television, and that kindled Nickson's interest in performing. When she was 17, Nickson left Singapore to study at the University of Hawaiʻi. Her successful audition for a play while she was there led to a shift in interest from business administration to drama. After two years, she left the university to work as a model, study acting, and perform in community theater productions.
Sources: en.wikipedia.org
== Legacy == The Rhodesian Air Training Group, widely accepted as the colony's main contribution to World War II, proved to be "one of the most important happenings in Rhodesian history", in the words of its commander Air Vice-Marshal Sir C W Meredith, as it led to great economic development and a large wave of immigration after the war by former instructors, trainees and other staff. This contributed to the swelling of Southern Rhodesia's white population to 135,596, over double its pre-war size, by 1951. RAF training operations in the country were stepped down considerably after the war, and the project formally ended in March 1954. The strengthening of ties with South Africa continued following the war as both countries underwent considerable industrialisation. Between 1948 and 1953 Southern Rhodesia and South Africa operated a customs agreement under which most export and import duties were waived. The decade immediately following 1945 has been called "the moment when Southern Rhodesia's economy 'took off'". Huggins, secure in office at the end of the war, remained Prime Minister for another decade afterwards, and oversaw the colony's Federation with Northern Rhodesia and Nyasaland in 1953. He retired in 1956. Southern Rhodesia contributed to several Commonwealth counter-insurgency operations during the 1950s and early 1960s, including the Malayan Emergency, similar actions in Aden and Cyprus, and Operation Vantage in Kuwait.
=== ICD-11 === Fibromyalgia is not listed as a code in the ICD-11. "Fibromyalgia syndrome" is listed as an inclusion in the ICD-11 code of "Chronic widespread pain" (CWP) (code MG30.01). (No other signs or symptoms of fibromyalgia are mentioned.)
=== Countercurrent exchange in sea and desert birds to conserve water === Sea and desert birds have been found to have a salt gland near the nostrils which concentrates brine, later to be "sneezed" out to the sea, in effect allowing these birds to drink seawater without the need to find freshwater resources. It also enables the seabirds to remove the excess salt entering the body when eating, swimming or diving in the sea for food. The kidney cannot remove these quantities and concentrations of salt. The salt secreting gland has been found in seabirds like pelicans, petrels, albatrosses, gulls, and terns. It has also been found in Namibian ostriches and other desert birds, where a buildup of salt concentration is due to dehydration and scarcity of drinking water. In seabirds the salt gland is above the beak, leading to a main canal above the beak, and water is blown from two small nostrils on the beak, to empty it. The salt gland has two countercurrent mechanisms working in it: a. A salt extraction system with a countercurrent multiplication mechanism, where salt is actively pumped from the blood 'venules' (small veins) into the gland tubules. Although the fluid in the tubules is with a higher concentration of salt than the blood, the flow is arranged in a countercurrent exchange, so that the blood with a high concentration of salt enters the system close to where the gland tubules exit and connect to the main canal.
==== Equivalence points ==== Due to the successive dissociation processes, there are two equivalence points in the titration curve of a diprotic acid. The first equivalence point occurs when all first protons from the first ionization are titrated. In other words, the amount of OH− added equals the original amount of H2A at the first equivalence point. The second equivalence point occurs when all protons are titrated. Therefore, the amount of OH− added equals twice the amount of H2A at this time. For a weak diprotic acid titrated by a strong base, the second equivalence point must occur at pH above 7 due to the hydrolysis of the resulted salts in the solution. At either equivalence point, adding a drop of base will cause the steepest rise of the pH value in the system.
is the Dirac delta function. The boundary conditions state that there are no shear stresses on the surface and a singular normal force P is applied at (0, 0). Applying these conditions to the governing equations of elasticity produces the result
Sources: en.wikipedia.org
Art in Canada is marked by thousands of years of habitation by Indigenous peoples, and, in later times, artists have combined British, French, Indigenous, and American artistic traditions, at times embracing European styles while working to promote nationalism. The nature of Canadian art reflects these diverse origins, as artists have taken their traditions and adapted these influences to reflect the reality of their lives in Canada. The Group of Seven is often considered the first uniquely Canadian artistic group and style of painting. Inuit art since the 1950s has been the traditional gift given to foreign dignitaries by the Canadian government. Historically, the Catholic Church was the primary patron of art in early Canada, especially Quebec. The Government of Canada has played a role in the development of art, through the department of Canadian Heritage by giving grants to art galleries, as well as by establishing and funding art schools and colleges across the country, and through the Canada Council for the Arts. The Canada Council Art Bank also helps artists by buying and publicizing their work. Great achievements in art in Canada are recognized through various awards and prizes, such as the Molson Prize, the Audain Prize for the Visual Arts, and the Governor General's Visual and Media Arts Awards.
Jung's work on himself and his patients convinced him that life has a spiritual purpose beyond material goals. The main task for people, he believed, is to discover and fulfill their deep, innate potential. Based on his study of Christianity, Hinduism, Buddhism, Gnosticism, Taoism, and other traditions, Jung believed this journey of transformation, which he called individuation, is at the mystical heart of all religions. It is a journey to meet the self and at the same time to meet the Divine. Unlike Freud's atheistic worldview, Jung's pantheism may have led him to believe that spiritual experience was essential to well-being, as he specifically identifies individual human life with the universe as a whole. In 1959, Jung was asked by the host, John Freeman, on the BBC interview program Face to Face whether he believed in God, to which Jung answered, "I do not need to believe. I know." Jung's ideas on religion counterbalance Freudian skepticism. Jung's idea of religion as a practical road to individuation is still treated in modern textbooks on the psychology of religion, though his ideas have been criticized. Jung recommended spirituality as a cure for alcoholism, and is considered to have had an indirect role in establishing Alcoholics Anonymous. Jung treated an American patient named Rowland Hazard III who had chronic alcoholism. After working with the patient for some time and achieving no significant progress, Jung told the man that his alcoholic condition was near hopeless, save only the possibility of a spiritual experience.
The two substrates of this enzyme are epipregnanolone and oxidised nicotinamide adenine dinucleotide phosphate (NADP+). Its products are 5β-dihydroprogesterone, reduced NADPH, and a proton. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 3beta-hydroxy-5beta-steroid:NADP+ 3-oxidoreductase. Other names in common use include 3beta-hydroxysteroid 5beta-oxidoreductase, and 3beta-hydroxysteroid 5beta-progesterone oxidoreductase.
Sanlúcar's name may have derived from the Arab šurūq (Arabic: شروق), the Arabic name for the Levant wind called sirocco or jaloque. According to the National Statistics Institute of Spain, the Sanlúcar toponym does not exist. However, there is historical mention of Brother Alfonso Sanlúcar de Barrameda, a Franciscan who was bishop of the Canaries-Rubicon in the period 1404–1417, and Fray Juan de Sanlúcar, a Franciscan who served in the same office from 1470–1474. As for the name Barrameda, it is unique to people born in the Canary Islands, according to census data from 1 January 2006. The historical relations between the House of Medina Sidonia, Sanlúcar, and the Canaries may explain the presence of these surnames in the Canaries. Barrameda was derived from bar-am-ma'ida, an Arabic phrase for "water well of the plateau".
=== Acute health effects === Capsaicin is a strong irritant requiring proper protective goggles, respirators, and proper hazardous material-handling procedures. Capsaicin takes effect upon skin contact (irritant, sensitizer), eye contact (irritant), ingestion, and inhalation (lung irritant, lung sensitizer). The LD50 in mice is 47.2 mg/kg. Painful exposures to capsaicin-containing peppers are among the most common plant-related exposures presented to poison centers. They cause burning or stinging pain to the skin and, if ingested in large amounts by adults or small amounts by children, can produce nausea, vomiting, abdominal pain, and burning diarrhea. Eye exposure produces intense tearing, pain, conjunctivitis, and blepharospasm.
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.
特沙莫瑞林是国际非专利名称，指一种经过 N 端修饰的生长激素释放激素类似物。它被归类为合成肽，序列与 GHRH(1-44) 密切相关。该名称不指代任何特定品牌或剂型。