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Product name: Theobromine
Synonym name: 3,7-Dimethylxanthine; Diurobromine; Santheose;
Catalogue No.: BP1389
Cas No.: 83-67-0
Formula: C7H8N4O2
Mol Weight: 180.167
Botanical Source: Theobroma cacao L.
Physical Description:
Type of Compound: Alkaloids
Purity: 95%~99%
Analysis Method: HPLC-DAD or/and HPLC-ELSD
Identification Method: Mass, NMR
Packing: Brown vial or HDPE plastic bottle
Storage: Store in a well closed container, protected from air and light. Put into refrigerate or freeze for long term storage.
Whenever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20℃. Generally, these will be useable for up to two weeks.
The product could be supplied from milligrams to grams
Inquire for bulk scale.
Chengdu Biopurify Phytochemicals Ltd. is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine，TCM), Natural Active Pharmaceutical Ingredients worldwide.
The main services:
A. Supply active ingredients and reference standards of TCM, from mgs to kgs scale
B. Custom extraction and purification, target Herb Active Ingredients
C. Custom synthesis and semi-synthesis for Natural Active Ingredients
D. CR(contract research), CM(contract manufacture) and PD(process development) services from lab scale, pilot scale to commercial scale(GMP is also available)
E. TCM compounds library for drug screen,more than 3000 compounds available, many of them are rare and unique.
HPLC of Theobromine
Storage conditions：Short-term storage at 2~8℃, long-term storage at -20 ~ -80℃
72.6800
-.1653
-.1724
2.4007
2.3654
22.1861
High
19.0886
2.4718
Yes
Yes
No
No
Yes
No
0.9
Yes
Yes
Yes
Yes
Theobromine (CAS number: 83-67-0) is a methylxanthine alkaloid naturally present in cocoa beans. It belongs to the dimethylxanthine in purine derivatives, with methyl substituents at positions 3 and 7 in its molecular structure. As one of the main active ingredients in the cocoa plant (Theobroma cacao), theobromine not only imparts unique physiological activity to chocolate but also attracts widespread attention for its diverse pharmacological effects. Its main pharmacological functions include vasodilation, diuresis, cardiac stimulation, and bronchiectasis. In addition, theobromine exhibits significant adenosine receptor antagonism, especially by inhibiting adenosine receptor A1 (AR1), thereby regulating the functions of the central nervous and cardiovascular systems.
In recent years, with the deepening development of natural product pharmacology and molecular pharmacology, theobromine's potential roles in antidepressant, neuroprotection, and metabolic regulation have gradually been revealed. The molecular targets involved include monoamine oxidase A/B (MAOA/MAOB), glycogen synthase kinase 3β (GSK3B), serotonin transporter (SLC6A4), 5-hydroxytryptamine receptor 1A (HTR1A), γ-aminobutyric acid receptor (GABRA1), cAMP reactive element-binding protein (CREB1), brain-derived neurotrophic factor (BDNF), and catechol-O-methyltransferase (COMT), among others. Demonstrates its multi-target regulatory potential in neuropsychiatric diseases.
This paper will systematically review the chemical structure and physicochemical properties of theobromine, plant origin and extraction methods, pharmacological activity and mechanism of action, druggability evaluation and pharmacokinetic characteristics, and look ahead to its potential for clinical application and future research directions, aiming to provide theoretical basis and practical guidance for research in the pharmacology of natural products and related fields.
Theobromine has the chemical name 3,7-dimethylxanthine, molecular formula C7H8N4O2, and molecular weight 180.1670. Its structure belongs to purine alkaloids, with a xanthine framework at its core, with a methyl group attached to the nitrogen atom at positions 3 and 7, forming a dimethyl substitution structure. This structure gives theobromine a good balance of lipid solubility and water solubility, with a LogP value of about -0.1653, indicating moderate hydrophilicity that facilitates absorption and distribution in the body.
The polar surface area (TPSA) was 72.68 Ų, indicating a certain polarity limit when crossing biofilms. However, combined with its high blood-brain barrier penetration capacity, theobromine can effectively enter the central nervous system. Water solubility is 2.4007 mg/mL, suitable for oral administration. Notably, theobromine does not exhibit hERG channel inhibitory activity, suggesting a low risk of cardiotoxicity; The Ames test result was 0.9, indicating an extremely low genotoxicity risk and a solid safety foundation.
It has high chemical structural stability, is not easily degraded at normal temperature and pressure, and has good thermal stability, making it suitable for food processing and pharmaceutical formulation needs. Its UV absorption peak is mainly concentrated in the 270-280 nm range, facilitating analysis, detection, and purity identification.
Theobroma is mainly found in the cocoa beans of the cocoa tree (Theobroma cacao), and its content is significantly influenced by variety, origin, maturity, and processing technology. Besides cocoa beans, tea, guarana (Paullinia cupana), and a few other plants also contain small amounts of theobromine, but the amount is much lower than cocoa beans.
Traditional extraction methods mainly include solvent extraction (liquid-liquid extraction), and supercritical fluid extraction. Solvent extraction typically uses ethanol, water, or their mixed solvents, optimizing extraction efficiency by adjusting pH and temperature. Liquid-liquid extraction utilizes the polarity of theobromine, commonly using organic solvents such as chloroform and ethyl acetate for separation and purification. In recent years, ultrasound-assisted extraction and supercritical CO2 extraction technologies have gradually become research hotspots due to their high efficiency, environmental friendliness, and low-temperature protection of active ingredients.
The purification steps after extraction typically use column chromatography (silica gel, C18 reversed-phase column) and high-performance liquid chromatography (HPLC) techniques to ensure high purity and activity stability of coobromine. Modern processes also combine membrane separation technology with crystal purification to improve yield and purity, meeting the needs of the pharmaceutical and food industries.
Theobromine, as an effective vasodilator, reduces the contractility of vascular smooth muscle cells by antagonizing adenosine receptors, especially the A1 subtype, promoting vasodilation and improving local blood perfusion. Animal experiments have shown that theobromine can significantly lower arterial blood pressure and improve microcirculation function. Additionally, its mild cardiac stimulation mainly manifests as increased heart rate and myocardial contractility. It is similar to caffeine but has a milder effect, suitable for regulating cardiovascular function.
Theobromine has a significant diuretic effect, involving the renal tubules inhibiting the reabsorption of sodium ions, promoting urine production and excretion. This effect helps regulate fluid balance and blood pressure, and clinically has adjunctive therapeutic value for patients with mild edema and hypertension.
As a bronchodilator, theobromine reduces bronchial smooth muscle contraction by blocking adenosine receptors, thereby relieving airway spasms. Experimental studies have shown that theobromine can be used as an adjunct treatment for asthma and chronic obstructive pulmonary disease (COPD), improving respiratory function.
Theobromine can cross the blood-brain barrier, act as an adenosine receptor antagonist, and enhance neural excitability and cognitive function. Its regulatory effects on the neurotransmitter system include inhibiting MAOA and MAOB activity, increasing concentrations of neurotransmitters such as dopamine and serotonin in the brain, modulating GABA receptor function, enhancing the expression of CREB1 and BDNF, and demonstrating antidepressant and neuroprotective potential.
Multiple in vitro and animal model studies have confirmed that theobromine regulates neurotransmitter metabolism and neuroplasticity through multi-target action, exhibiting antidepressant activity. Its targets include MAOA, MAOB, GSK3B, SLC6A4, HTR1A, GABRA1, CREB1, BDNF, and COMT, comprehensively regulating neural signal transduction and neuronal survival, with potential value for antidepressant drug development.
Theobromine acts as a non-selective antagonist of adenosine receptors, especially showing high affinity for A1 receptors. Adenosine receptors are widely distributed in the central nervous system and cardiovascular system, regulating nerve transmission, heart rate, vascular tone, and metabolism. By blocking A1 receptors, theobromine releases adenosine-mediated inhibitory signals, enhances neural excitability and myocardial contractility, and promotes vasodilation.
MAOA and MAOB are the main monoamine oxidases in the brain, involved in the metabolism of neurotransmitters such as dopamine, serotonin, and norepinephrine. Theobromine's inhibitory effect on MAOA/MAOB increases neurotransmitter levels in the brain, improves mood, and alleviates depressive symptoms.
GSK3B plays a key role in neuron development, apoptosis, and inflammatory responses. Theobromine regulates GSK3B activity, promotes neuron survival and functional recovery, enhances neuroplasticity, and helps with antidepressant and neuroprotection.
SLC6A4 encodes serotonin transporters and regulates the reuptake of serotonin. HTR1A is a 5-hydroxytryptamine receptor subtype involved in mood and anxiety regulation. Theobromine regulates the serotonin signaling pathway by affecting these two targets, providing antidepressant and anti-anxiety effects.
GABRA1 is a GABA_A receptor subunit that mediates inhibitory signaling in the central nervous system. Theobromine regulates GABRA1 function, balances excitability and inhibition, and alleviates symptoms of anxiety and depression.
CREB1 acts as a transcription factor, regulating the expression of neurotrophic factors such as BDNF. BDNF is crucial for neuronal growth, differentiation, and synaptic plasticity. Theobromine promotes CREB1 phosphorylation and BDNF expression, enhancing neural repair and functional recovery.
COMT is involved in the metabolism of catecholamine neurotransmitters. Theobromine's regulation of COMT helps maintain neurotransmitter balance and assists in improving neuropsychiatric diseases.
Theobromine has a moderate molecular weight (180.1670), which complies with the Lipinski rule, with a LogP value of -0.1653, indicating moderate hydrophilicity and favorable oral absorption. The TPSA value is 72.68 Ų, supporting its excellent biofilm permeability, especially its high blood-brain barrier permeability, making it suitable for central nervous system drug development.
In terms of safety, theobromine does not inhibit hERG channels, reducing the risk of arrhythmias; The Ames test result was 0.9, indicating extremely low genotoxicity and a solid safety foundation.
After oral administration, theobromine is rapidly absorbed and has high bioavailability. It is widely distributed and can effectively cross the blood-brain barrier to reach the central nervous system. Metabolism mainly occurs through the liver's CYP450 enzyme system, producing various metabolic products, some of which are active in mice. Excretion is mainly completed by the kidneys, with a moderate half-life and supports multiple dosing regimens.
Pharmacokinetic studies show that theobromine has good in vivo stability and a controllable metabolic rate, making it suitable for development as an oral formulation.
As a natural product, theobromine shows broad prospects for clinical applications due to its multi-target and multifunctional pharmacological properties. Its vasodilatory and diuretic effects give it potential in adjunctive treatment of cardiovascular diseases, especially in patients with hypertension and mild heart failure. Bronchodilator provides new treatment options for asthma and COPD patients.
In the field of neuropsychiatric disorders, theobromine's antidepressant, anxioanxiety, and neuroprotective effects deserve in-depth clinical validation. By regulating multiple neurotransmitter pathways and promoting the expression of neurotrophic factors, it may serve as a natural alternative or adjuvant to psychotropic drugs. At the same time, due to its good safety and blood-brain barrier penetration, theobromine is expected to be developed as a therapeutic drug for central nervous system diseases.
Future research should focus on optimizing theobromine drug formulations to enhance its bioavailability and targetability; Conduct systematic clinical trials to verify efficacy and safety; Explore its potential for combined use with other drugs. In addition, in-depth mechanism research based on molecular targets will provide a theoretical basis for the design of novel derivatives and promote innovative development of theobromine-related drugs.
Theobromine, as a widely sourced and structurally well-defined natural methylxanthine compound, has become a hot topic in natural product pharmacology research due to its diverse pharmacological activities and good druggability. Its potential applications in cardiovascular, respiratory, and neuropsychiatric diseases demonstrate the important value of natural products in modern drug development. In the future, with advances in molecular pharmacology and medicinal chemistry, theobromine and its derivatives are expected to become new clinical drugs, contributing more to human health.
Shenshuai
Wenjing
Hedandan
