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ACP-105 SARM STRIPS - 20MG/STRIP
ACP-105: A next-generation SARM strip with cognitive protection & anti-anxiety benefits
ACP-105 was one of the first SARMs to be developed using the proprietary Receptor Selection and Amplification TechnologyTM (R-SAT). R-SAT is a functional cell-based assay that allows the monitoring of receptor-dependent proliferative responses of various receptor classes, including G-protein-coupled receptors and nuclear receptors like the Androgen Receptor (AR).
SARM strips are different than powder or liquid. Individually packaged SARM strips are a gel base media that has a specific SARM compound and quantity imbedded into the gel. This dissolvable matrix is able to be accurately concentrated, is highly durable while at the same time being quite portable and storage stable. Relative to other mediums, SARM Strips potentially promote greater testing compliance and more consistent tests results.
CAS No: 899821-23-9
Main Pre-Clinical Research Findings for ACP-105 treatment
- Anabolic in muscle and bone 
- Decreased anxiety-like behavior 
- Beneficial in animal models of dementia and Alzheimer’s Disease, in both males and females , –
- Cognitive protection following radiation exposure 
Selected Preclinical Studies:
1. Synthesis, Structure-Activity Relationships, and Characterization of Novel Nonsteroidal and Selective Androgen Receptor Modulators 
This paper describes the discovery of ACP-105, a novel and potent nonsteroidal selective androgen receptor modulator (SARM) with partial agonist activity relative to the natural androgen testosterone. ACP-105 was developed from a series of compounds found in a High Throughput Screen using the Receptor Selection and Amplification Technology (R-SAT). In vivo, ACP-105 improved anabolic parameters in a 2-week study. In addition to compound ACP-105, a number of structurally related compounds were discovered from the same series which showed blockingactivity of the Androgen Receptor T877A mutant that is involved in prostate cancer growth.
The design of nonsteroidal androgen receptor (AR) ligands with specific pharmacological profiles will expand the clinical applications of androgens in diseases of the prostate, hormone-replacement therapy, osteoporosis, and perhaps even male contraception. Physiologically, AR is predominantly activated by testosterone (T) and its metabolite dihydrotestosterone (DHT). In addition, various synthetic androgen steroidal ligands have been developed for the treatment of, for example, male hypogonadism, muscle wasting, anemia, benign prostate hyperplasia, and prostate cancer. However, the use of steroidal androgens has been limited because of the risk of serious side effects, e.g., cardiovascular events, hepatotoxicity, and the potential of prostatic hyperplasia or cancer , . In particular, the lack of discrimination between anabolic and androgenic effects of the current forms of testosterone is of major concern and has driven the search for next-generation SARMs.
Reseachers first tested the metabolic clearance determined in liver microsomes, and the half-life ACP-105 in human hepatocytes was found to be 5.0 h. Pharmacokinetic studies were performed showing high oral bioavailability of ACP-105 in both rats and dogs (rats = 38% bioavailability and dogs = 56% bioavailability). ACP-105 was further assessed for efficacy and selectivity in the stimulation of muscle vs prostate tissue growth in male rats. This pharmacological model has been widely used for the assessment of anabolic and androgenic activities. ACP-105 was delivered via subcutaneous osmotic pumps for 14 days at doses of 0.1-3 (mg/kg)/day. Testosterone propionate was administered at a dose of 0.75 (mg/kg)/day. After 2 weeks of dosing, levator ani muscle and prostate tissues were weighed and compared to those of a control group.
The main finding from this study was that ACP-105 produced a robust anabolic effect on the levator ani muscle (67% reversal of atrophy) while having lesser androgenic effects on prostate (21% reversal vs. 48% for Testosterone alone). Furthermore, to test if ACP-105 was a partial AR agonist in vivo, its ability to reverse the androgenic actions of testosterone was evaluated. Subjects were dosed daily with either testosterone propionate, 1 mg/kg, alone or together with ACP-105, 10 mg/kg oral, for 14 days. Twenty-four hours after the last dosing, the weights of their prostate measured. Testosterone propionate alone produced unwanted androgenic effects in the prostate, yet that effect was lessened by concurrent use of ACP-105.
2. Selective Androgen Receptor Modulators Antagonize Apolipoprotein E4- Induced Cognitive Impairments 
While tissue specific effects of selective androgen receptor modulators (SARMs) outside the brain have been reported, little is known about brain specific SARMs. In this study, researchers show that ACP-105 upregulate androgen receptor levels in brain following and prevents impairments in hippocampus-dependent novel location recognition and spatial memory retention in animals. Together with the reduced androgen levels in aged men and women and the beneficial effects of androgens on brain function and pathology in Alzheimer’s disease-related models, this study supports the therapeutic potential of ACP-105 for age-related cognitive decline and Alzheimer’s disease.
Reduced androgen levels in aged men and women are risk factors for age-related cognitive decline and Alzheimer’s disease (AD). Ongoing clinical trials are designed to evaluate the potential benefit of estrogen in women and of testosterone in men. Apolipoprotein E (apoE) is important for lipoprotein and cholesterol metabolism and implicated in nerve development and regeneration, neurite outgrowth and neuroprotection . Gene levels of apoE4, a risk factor for age-related cognitive decline and AD compared to apoE2 and apoE3, in apoE4 deficient mice leads to age-related impairments in spatial learning and memory in animals. These impairments are observed in animals that express apoE4 in neurons and other brain cell types. They require apoE4 and are not seen in animals deficient in apoE4. Effects of apoE4 on androgen receptor (AR) function might contribute to these cognitive impairments.
Selective androgen receptor modulators (SARMs) are tissue specific and do not have similar side effects associated with the use of conventional androgens, like testosterone propionate. Effects of SARMs outside the brains have been reported. For example, in multiple animal models, SARMs restored muscle mass, muscle strength and body composition, and prevented bone loss in aged animals, prostate tumor growth, and orchidectomy-induced bone loss. SARMs are also promising for effects in the brain. In this study, researchers tested whether ACP-105 can prevent apoE4-related cognitive impairments.
Testosterone and DHT can both effectively prevent cognitive deficits in young apoE4 deficient animals, in spatial memory retention in the water maze probe trials . To determine whether SARMs similarly can antagonize cognitive impairments in apoE4 deficient animals, young mice were treated with ACP-105 (3 mg/kg) and comparted to control mice. Encouragingly, ACP-105 treated animals showed improved spatial memory retention. These results demonstrate that, like testosterone and DHT, ACP-105 can prevent the development of cognitive deficits in apoE4 deficient animals.
In healthy elderly men and women, salivary testosterone levels are lower in apoE4 deficient individuals .Therefore, stimulation of AR-mediated signaling by SARMs might be particularly valuable in apoE4 deficient individuals. Especially in men, age-related testosterone depletion is a risk factor for Alzheimer’s Disease (AD) and testosterone, and apoE4 deficiency influences the risk of AD . Androgens protect against acceleration of AD-like neuropathology in animals bearing three other AD-related genes (APPSWE, PS1M146V, tauP301) . Thus, SARMs without effects in the prostate would be valuable for development in this field. Therefore, increased efforts are warranted to assess the therapeutic effects of SARMs, especially ACP-105 in particular, to prevent age-related cognitive decline and AD in both women and men.
ACP-105 is an exciting next generation SARM that is being explored for both anabolic effects in muscle and bone in addition to cognitive protection in a variety of disease contexts.
Disclaimer: This information is for educational purposes only and does not constitute medical advice. THE PRODUCTS DESCRIBED HEREIN ARE FOR RESEARCH USE ONLY. All clinical research must be conducted with oversight from the appropriate Institutional Review Board (IRB). All preclinical research must be conducted with oversight from the appropriate Institutional Animal Care and Use Committee (IACUC) following the guidelines of the Animal Welfare Act (AWA).
- N. Schlienger et al., “Synthesis, structure-activity relationships, and characterization of novel nonsteroidal and selective androgen receptor modulators,” J. Med. Chem., 2009.
- C. A. Frye, K. Edinger, and K. Sumida, “Androgen administration to aged male mice increases anti-anxiety behavior and enhances cognitive performance,” Neuropsychopharmacology, 2008.
- M. Ramsden et al., “Androgens modulate β-amyloid levels in male rat brain,” J. Neurochem., 2003.
- S. Acevedo, L. Gardell, S. Bradley, F. Piu, and J. Raber, “Selective Androgen Receptor Modulators Antagonize Apolipoprotein E4-Induced Cognitive Impairments,” Lett. Drug Des. Discov., 2008.
- C. Dayger, L. Villasana, T. Pfankuch, M. Davis, and J. Raber, “Effects of the SARM ACP-105 on rotorod performance and cued fear conditioning in sham-irradiated and irradiated female mice,” Brain Res., 2011.
- E. Nieschlag, “Testosterone treatment comes of age: New options for hypogonadal men,” Clinical Endocrinology. 2006.
- S. Basaria and A. S. Dobs, “Risks versus benefits of testosterone therapy in elderly men,” Drugs and Aging. 1999.
- R. W. Mahley, “Apolipoprotein E: Cholesterol transport protein with expanding role in cell biology,” Science. 1988.
- Y. Huang, “Molecular and cellular mechanisms of apolipoprotein E4 neurotoxicity and potential therapeutic strategies,” Current Opinion in Drug Discovery and Development. 2006.
- F. Berteau-Pavy, B. Park, and J. Raber, “Effects of sex and APOE ε4 on object recognition and spatial navigation in the elderly,” Neuroscience, 2007.
- D. M. Martin, G. Wittert, N. R. Burns, M. T. Haren, and R. Sugarman, “Testosterone and cognitive function in ageing men: Data from the Florey Adelaide Male Ageing Study (FAMAS),” Maturitas, 2007.
- E. R. Rosario, J. C. Carroll, S. Oddo, F. M. LaFerla, and C. J. Pike, “Androgens regulate the development of neuropathology in a triple transgenic mouse model of Alzheimer’s disease,” J. Neurosci., 2006.
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