MK-677 Research

Tojo R, Tashiro M, Takahashi H, Tamura H

Feeding behavior is influenced by both metabolic drive and emotional context, yet how acute stress interferes with hunger-driven motivation remains poorly understood. Using a conflict-based open-field feeding paradigm, we examined how 30-min restraint stress alters food-seeking behavior in fasted...

Kintz P, Gheddar L

On numerous occasions during hearings at the Court of Arbitration for Sport (CAS), it has been advocated by the anti-doping authorities that the results of hair tests should be interpreted with utmost precautions. This was due to the lack of data for the interpretation of the results. In particul...

Cobani E, Amin MS, Hasso M, Kumbar L

MK-677, a growth hormone secretagogue, is gaining popularity among performance-enhancing supplements. While its side effects include oedema, increased appetite and muscle pain, reports of hepatotoxicity are scarce. Here we present the case of an otherwise healthy man in his early 30s, who develop...

Barrios MM, Deconinck E, Vanhee C, Lamme EK, 't Hart-Bakker I, Syversen PV et al.

Although the abuse of muscle-building compounds in elite sports is already known for a long time, these products have become more popular in recreational sport over the past years. Although anabolic steroids are still the most popular ones in this context, the use of other molecules with anabolic...

Xu H, Liu M, Jia X, Zhao S, Xia Y, Lu B et al.

Recombinant human growth hormone (rhGH) is a well-established treatment for children with growth deficiencies worldwide. However, its requirement for subcutaneous administration limits convenience compared to that of oral therapies. Starting from capromorelin, we designed, synthesized, and charac...

Poelman R, Le May MV, Schéle E, Stoltenborg I, Dickson SL

Ghrelin, the endogenous ligand of the growth hormone secretagogue receptor (GHSR), promotes food intake and other feeding behaviors, and stimulates growth hormone (GH) release from the pituitary. Growth hormone secretagogues (GHS), such as GHRP-6 and MK-0677, are synthetic GHSR ligands that activ...

Stawerska R

This paper reviews clinical-trial evidence on the use of long-acting growth hormone (LAGH) preparations in children. Three LAGH products have been approved in Europe and the United States for paediatric growth hormone deficiency (GHD): lonapegsomatropin, somapacitan, and somatrogon. Ongoing clini...

Abdul Ghafoor N, Rasuli S, Tanriverdi Ö, Yildiz A

The MDM2-p53 pathway plays a pivotal role in regulating cell cycle and apoptosis, with its dysfunction contributing to approximately 50% of human malignancies. MDM2, an E3 ubiquitin ligase, targets the tumour suppressor p53 for degradation, thereby promoting uncontrolled cell growth in cancers. I...

Chong S, Woolnough CA, Koyyalamudi SR, Perera NJ

Commercially available performance-enhancing supplements can contain banned performance-enhancing drugs (PEDs) and undisclosed steroid hormones that can induce hormonal abnormalities with associated clinical signs. We present a case of a 40-year-old male who developed bilateral gynecomastia and b...

Viljanto M, Cutler C, Taylor P, Habershon-Butcher J, Gray B

MK-0677 (ibutamoren) is an orally active non-peptide growth hormone secretagogue that binds to the ghrelin receptor stimulating the secretion of endogenous growth hormone. It is one of the most prevalent performance-enhancing compounds currently available online and is potentially subject to abus...

Cardaci TD, Machek SB, Wilburn DT, Heileson JL, Harris DR, Cintineo HP et al.

What is the main observation in this case? Co-administration of LGD-4033 and MK-677 increased body mass, lean mass and fat mass, while negatively impacting bone, serum lipids, liver enzymes, testosterone (total and free) and, probably, follicle-stimulating hormone. What insights does it reveal? O...

Sun Y, Ye X, Kennedy H, Smith AGA, Smith RG

Activation of ghrelin receptor growth hormone secretagogue receptor (GHS-R) by endogenous or synthetic ligands amplifies pulsatile release of growth hormone (GH) and enhances food intake, very relevant to development and growth. GHS-R is a G-protein coupled receptor that has great druggable poten...

Fang F, Goldstein JL, Shi X, Liang G, Brown MS

Wild-type (WT) mice maintain viable levels of blood glucose even when adipose stores are depleted by 6 d of 60% calorie restriction followed by a 23-h fast (hereafter designated as "starved" mice). Survival depends on ghrelin, an octanoylated peptide hormone. Mice that lack ghrelin suffer lethal ...

Philip M, Karakka Kal AK, Subhahar MB, Karatt TK, Mathew B, Koshy SA et al.

It is important to remember that performance-enhancing agents such as non-peptide growth hormone secretagogues present a significant risk of abuse. Ibutamoren (MK-0677) is a potent, long-acting, selective non-peptide growth hormone secretagogue that can be taken orally.This study examines ibutamo...

Bright GM, Thorner MO

LUM-201 (ibutamoren, formerly MK-0677) is an orally administered GH secretagogue receptor agonist under development for treatment of pediatric growth hormone deficiency (PGHD).The GH response to a single dose of LUM-201 and to other GH secretagogues used for diagnosis of PGHD were compared in 68 ...

Cutler C, Viljanto M, Taylor P, Habershon-Butcher J, Van Eenoo P

Ibutamoren mesylate, or MK-0677, is an orally active, nonpeptide growth hormone secretagogue that has been developed to stimulate excretion of endogenous growth hormone. It has been evaluated for the treatment of a range of clinical conditions but is not available therapeutically. Nonetheless, MK...

Sedov EV, Freire PJ, Seredin VV, Kolbasin VA, Kamalian-Kopae M, Chekhovskoy IS et al.

We combine the nonlinear Fourier transform (NFT) signal processing with machine learning methods for solving the direct spectral problem associated with the nonlinear Schrödinger equation. The latter is one of the core nonlinear science models emerging in a range of applications. Our focus i...

Gheddar L, Raul JS, Kintz P

Selective Androgen Receptors Modulators (SARMs) are a new class of doping drugs that emerged in sport since 2008. Easy access on the Internet also leads to their misuse by amateurs. It seems important for a laboratory of toxicology to develop a targeted screening of SARMs, given their health risk...

Liu H, Sun D, Myasnikov A, Damian M, Baneres JL, Sun J et al.

The hunger hormone ghrelin activates the ghrelin receptor GHSR to stimulate food intake and growth hormone secretion and regulate reward signaling. Acylation of ghrelin at Ser3 is required for its agonistic action on GHSR. Synthetic agonists of GHSR are under clinical evaluation for disorders rel...

Philip M, Karakka Kal AK, Subhahar MB, Perwad Z, Karatt TK

Interest in growth hormone secretagogues has intensified during the past several years based on capable, ever-widening investigational applications of recombinant growth hormone in animals and humans. Ibutamoren is a potent, long-acting, selective and orally active non-peptide growth hormone secr...