Research Classes
Peptides and related research compounds can be organized according to the biological systems and signaling pathways they are designed to investigate. A single compound may fit into more than one category. The categories below are intended to make the Apex Research Library easier to understand.
METABOLIC & INCRETIN RESEARCH
This category includes compounds investigated for their interaction with metabolic hormones and receptors involved in nutrient signaling.
- GLP-1: involved in glucose-dependent insulin signaling, appetite regulation, gastric activity, and metabolic communication.
- GIP: participates in metabolic and insulin-related signaling.
- Glucagon: involved in glucose regulation and energy metabolism.
Apex Examples
- Semaglutide
- Tirzepatide
- Retatrutide
- Cagrilintide
- Survodutide
- AOD-9604
GROWTH HORMONE AXIS
The growth-hormone axis involves communication between the hypothalamus, pituitary gland, growth hormone, and downstream signaling such as IGF-1.
- GHRH receptors
- Growth-hormone secretagogue receptors
- Pituitary GH signaling
- GH / IGF-1 pathways
Apex Examples
- CJC-1295 No DAC
- Ipamorelin
- Sermorelin
- Tesamorelin
- CJC-1295 No DAC + Ipamorelin
REPAIR & CELLULAR SIGNALING
This group includes compounds investigated in experimental models involving tissue-response pathways, cellular migration, extracellular matrix biology, inflammatory signaling, and vascular responses.
- Fibroblast activity
- Angiogenic signaling
- Collagen biology
- Cellular migration
- Tissue-response pathways
- Gastrointestinal models
MITOCHONDRIAL & CELLULAR ENERGY RESEARCH
Mitochondria play a central role in cellular energy production and metabolic signaling.
- Mitochondrial membranes
- ATP production
- Cellular stress signaling
- Metabolic flexibility
- Oxidative processes
- Mitochondrial-derived signaling peptides
NEUROLOGICAL & COGNITIVE RESEARCH
Neuropeptide research examines signaling within the brain and nervous system.
- Neurotransmitter signaling
- Stress-response pathways
- Neurotrophic factors
- Sleep biology
- Cognitive processes
- Neuroprotection
IMMUNE RESEARCH
Some peptides are investigated for their interaction with innate and adaptive immune signaling.
- T-cell activity
- Innate immune responses
- Cytokine signaling
- Antimicrobial pathways
- Inflammatory signaling
- Immune regulation
REPRODUCTIVE & MELANOCORTIN RESEARCH
This group covers peptide signaling associated with reproductive endocrinology and central melanocortin pathways.
- GnRH signaling
- LH and FSH release
- Kisspeptin receptors
- Melanocortin receptors
- Central nervous-system signaling
LONGEVITY & CELLULAR AGING RESEARCH
This category explores pathways associated with cellular aging, mitochondrial health, circadian biology, oxidative stress, and cellular resilience.
- Telomere biology
- Mitochondrial signaling
- Cellular stress responses
- Circadian signaling
- Age-associated metabolic changes
Apex Examples
- Epitalon / Epithalon
- MOTS-C
- Humanin
- SS-31
- NAD+
LONGEVITY & CELLULAR AGING RESEARCH
This category explores pathways associated with cellular aging, mitochondrial health, circadian biology, oxidative stress, and cellular resilience.
- Telomere biology
- Mitochondrial signaling
- Cellular stress responses
- Circadian signaling
- Age-associated metabolic changes
Apex Examples
- Epitalon / Epithalon
- MOTS-C
- Humanin
- SS-31
- NAD+