Hermetica Superfood Encyclopedia
The Short Answer
Solanum aculeastrum contains the steroidal alkaloids solamargine and solasodine, which exhibit cytotoxic, P-glycoprotein-inhibiting, antimicrobial, and antileishmanial activity in preclinical models. Solamargine demonstrated an IC₅₀ of 15.62 μg/mL against SH-SY5Y neuroblastoma cells and up to 9.1-fold inhibition of the drug-efflux pump P-glycoprotein at 100 μg/mL in vitro, enhancing doxorubicin cytotoxicity additively.
CategoryHerb
GroupAfrican
Evidence LevelPreliminary
Primary KeywordSolanum aculeastrum benefits
Soda Apple — botanical close-up
Health Benefits
**Antimicrobial Activity**
Fruit and leaf extracts show inhibition of multiple bacterial and fungal strains at concentrations ≤5 mg/mL in vitro, attributed to alkaloid and saponin content, supporting traditional East African use for infectious conditions.
**Antileishmanial Effects**
Water and methanol fruit extracts reduce Leishmania major amastigote infection rates in macrophages in a dose-dependent manner from 125–1000 μg/mL, offering a preliminary basis for further antiprotozoal drug discovery.
**Cytotoxic Potential Against Cancer Cells**
Solamargine isolated from fruit extracts exhibits IC₅₀ values of 15.62 μg/mL on SH-SY5Y neuroblastoma cells, and crude fruit extract achieves IC₅₀ of 10.72 μg/mL, suggesting relevant bioactivity, though non-selectivity limits current therapeutic applicability.
**P-Glycoprotein Inhibition**: Crude and aqueous fruit extracts produce 5
9- to 21.2-fold inhibition of P-glycoprotein at 100 μg/mL, a known multidrug-resistance efflux pump, additively enhancing doxorubicin cytotoxicity in neuroblastoma cell lines.
**Antimycoplasmal Properties**
Isolated steroidal derivatives (compounds 4 and 7) from S. aculeastrum inhibit Mycoplasma mycoides subsp. mycoides growth with MIC values of 12.5–25 μg/mL, likely exploiting the reduced genome complexity of mycoplasmas.
**Anti-inflammatory and Antipyretic Actions**
Solasodine identified in leaf and root bark extracts demonstrates antipyretic and immunomodulatory properties in animal models, supporting traditional use of the plant for fever management in African ethnomedicine.
**Antifungal and Antiandrogenic Bioactivity**
Solasodine further exhibits antifungal and antiandrogenic activity in preclinical models, with β-sitosterol derivatives and sterols isolated from berries contributing to the plant's multi-target pharmacological profile.
Origin & History
Natural habitat
Solanum aculeastrum, commonly called soda apple or goat apple, is native to sub-Saharan Africa and grows widely across East and South Africa, including Kenya, Tanzania, Ethiopia, and South Africa. It thrives in disturbed soils, roadsides, savanna margins, and semi-arid highland areas at elevations up to approximately 2,400 meters. The plant is a thorny perennial shrub that produces small, tomato-like berries that ripen from green to yellow and has been used in rural communities without formal cultivation.
“Solanum aculeastrum has a well-documented history in East and South African ethnomedicine, where rural communities in Kenya, Ethiopia, Tanzania, and South Africa use the fruits as an alternative or adjunct treatment reported by cancer sufferers and as a topical or oral antimicrobial remedy. The plant's vernacular names across the region reflect its widespread familiarity — called 'sodom apple' or 'goat apple' in anglophone areas and various local-language names reflecting its prickly morphology and bitter fruit taste. Traditional healers prepare decoctions from fruits, leaves, and root bark to address fever, skin infections, and livestock diseases, and the plant has been documented in surveys of African medicinal flora as a treatment for gonorrhoea, ringworm, and toothache. Its use against leishmaniasis in endemic highland zones of East Africa aligns with emerging preclinical data, reflecting an empirical tradition that preceded formal pharmacological investigation.”Traditional Medicine
Scientific Research
All published evidence for S. aculeastrum derives from in vitro cell-line assays and limited in vivo preclinical experiments; no human clinical trials have been registered or completed as of the current literature. Cytotoxicity data originate from neuroblastoma cell-line (SH-SY5Y) studies with IC₅₀ values quantified for isolated solamargine and crude/aqueous/methanolic fractions, but sample sizes and replication details are not consistently reported. Antileishmanial testing in BALB/c mice provides preliminary in vivo data, yet effect sizes, confidence intervals, and statistical methods are incompletely described in available publications. Antimycoplasmal and P-glycoprotein inhibition findings, while mechanistically interesting, have not been reproduced in independent laboratories, leaving the overall evidence base characterized as early-stage and exploratory.
Preparation & Dosage
Traditional preparation
**Traditional Crude Fruit Extract**
Whole or mashed ripe berries prepared as decoctions or infusions in water; no validated dose established; used empirically in East African folk medicine for infections and as a cancer adjunct.
**Aqueous Fraction (Research Grade)**
Prepared by liquid-liquid partitioning of crude methanol extracts; tested at 125–1000 μg/mL in antileishmanial assays; no human-equivalent dose calculated.
**Methanolic Extract**
5 mg/mL in antimicrobial assays; not commercially standardized
Prepared by ultrasonic maceration of dried fruit or leaf material in methanol; active at ≤.
**Isolated Solamargine**
Purified via column chromatography, solid-phase extraction, and preparative TLC from aqueous fractions; tested at 15.62 μg/mL IC₅₀ in vitro; no oral bioavailability or human dose established.
**Standardization Status**
No commercial supplement formulations with certified solamargine or solasodine content percentages are currently available; all dosing references derive from bench research, not clinical use.
**Timing and Route**
All active concentrations reported are in vitro; oral bioavailability, first-pass metabolism, and tissue distribution in humans are entirely unknown.
Nutritional Profile
Solanum aculeastrum is not consumed as a food crop due to alkaloid-associated bitterness and potential toxicity; formal macronutrient and micronutrient profiling of its edible fractions is not available in the published literature. Phytochemical screening of fruit extracts identifies alkaloids and saponins as the most abundant compound classes in aqueous fractions, while flavonoids, phenols, tannins, and terpenoids are present at comparatively low concentrations in methanolic extracts. Key identified bioactive phytochemicals include the steroidal glycoalkaloids solamargine and solanine, the aglycone solasodine, and β-sitosterol derivatives and other sterols isolated from berry material. Quantitative concentrations in mg per gram of plant material have not been standardized across studies, and bioavailability of steroidal alkaloids from oral ingestion of crude plant material in humans has not been assessed.
How It Works
Mechanism of Action
Solamargine, the primary steroidal glycoalkaloid of S. aculeastrum, induces non-selective cytotoxicity in both cancerous and normal dividing cell lines, though the precise apoptotic or necrotic pathway has not been fully characterized at the molecular level. The compound and the crude aqueous extract also inhibit P-glycoprotein (ABCB1) in a dose-dependent manner, reducing drug efflux from resistant cancer cells and thereby potentiating intracellular accumulation of co-administered cytotoxic agents such as doxorubicin. Solasodine likely exerts antifungal effects through disruption of sterol biosynthesis or membrane integrity, consistent with the broad mechanism seen in other Solanum steroidal alkaloids, and its antiandrogenic activity may involve competition at androgen receptor-binding sites. The antimycoplasmal activity of isolated steroidal derivatives appears to exploit the limited repair and biosynthetic capacity of Mycoplasma mycoides due to its reduced genome, though the precise membrane or metabolic target remains unconfirmed.
Clinical Evidence
No human clinical trials investigating S. aculeastrum or its isolated compounds (solamargine, solasodine) for any indication have been identified in the published literature. Available preclinical outcomes include IC₅₀ cytotoxicity values on SH-SY5Y neuroblastoma cells (crude extract 10.72 μg/mL, solamargine 15.62 μg/mL), P-gp inhibition fold-changes (up to 21.2-fold at 100 μg/mL), and antileishmanial infection-rate reductions in macrophage models — all generated outside human subjects. The absence of pharmacokinetic data, standardized doses, and safety profiling in humans means that effect sizes cannot be translated to clinical recommendations. Confidence in translational utility is very low; all findings should be interpreted as hypothesis-generating for future drug discovery rather than evidence of efficacy in people.
Safety & Interactions
Solamargine and the crude fruit extracts of S. aculeastrum exhibit non-selective cytotoxicity, demonstrating similar IC₅₀ values against both cancerous neuroblastoma cells and non-cancerous Vero cells, which represents a significant safety liability that currently precludes therapeutic development without further selectivity optimization. No formal human toxicology studies, maximum tolerated dose trials, or NOAEL (no-observed-adverse-effect level) determinations have been conducted, leaving the safety profile in humans entirely uncharacterized. Steroidal glycoalkaloids as a chemical class — including solanine — are known to cause gastrointestinal irritation, hemolysis, and neurotoxicity at elevated doses; these class-based risks apply to S. aculeastrum preparations despite the absence of specific human adverse-event data. Additive interactions with doxorubicin through P-glycoprotein inhibition have been demonstrated in vitro at cytotoxic concentrations, raising concern about unpredictable pharmacokinetic interactions with chemotherapeutic agents; use during pregnancy, lactation, or in children is not supported by any safety evidence.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
Solanum aculeastrumSoda appleGoat appleSodom appleIntshungu (Zulu)Bitter apple nightshade
Frequently Asked Questions
What is Solanum aculeastrum used for in traditional African medicine?
In East and South African ethnomedicine, S. aculeastrum fruits, leaves, and root bark are used as decoctions to treat infections including gonorrhoea, ringworm, and skin conditions, as well as fever and, by some communities, as a self-administered alternative treatment by cancer patients. The plant also features in traditional veterinary medicine for livestock diseases linked to mycoplasmal infection. These uses are supported by preliminary in vitro antimicrobial and antileishmanial data but have not been validated in controlled human trials.
Does Solanum aculeastrum have proven anticancer effects in humans?
No human clinical trials have tested S. aculeastrum or its isolated compound solamargine for cancer treatment. In vitro, solamargine achieved an IC₅₀ of 15.62 μg/mL against SH-SY5Y neuroblastoma cells and the crude fruit extract reached 10.72 μg/mL, but these cytotoxic effects are non-selective, affecting normal cells at similar concentrations. Current evidence is purely preclinical and cannot be translated into clinical anticancer recommendations.
Is Solanum aculeastrum safe to consume?
Human safety data for S. aculeastrum are essentially absent; no clinical toxicology studies have been published. The steroidal glycoalkaloids it contains — solamargine, solanine, and solasodine — belong to a class known to cause gastrointestinal irritation, hemolysis, and neurotoxicity at high doses, and solamargine has demonstrated non-selective cytotoxicity against normal cells in vitro. Consumption, especially of unripe fruits, carries unknown but potentially significant risk, and use is not recommended outside supervised research settings.
What are the key bioactive compounds in Solanum aculeastrum?
The primary bioactive compounds are solamargine (a steroidal glycoalkaloid with cytotoxic and P-glycoprotein-inhibiting activity), solasodine (an aglycone with antifungal, antiandrogenic, diuretic, and antipyretic properties in animal models), and solanine (present in fruit extracts but lacking notable bioactivity in tested assays). β-Sitosterol derivatives and other sterols have also been isolated from berries, and aqueous fruit extracts are particularly rich in alkaloids and saponins compared to methanolic fractions.
What is the recommended dose of Solanum aculeastrum extract?
No standardized or clinically validated dose exists for any preparation of S. aculeastrum. Research studies have employed in vitro concentrations of 125–1000 μg/mL for antileishmanial assays and ≤5 mg/mL for antimicrobial testing, but these figures cannot be directly converted to safe human oral doses. There are no commercially standardized supplements, no bioavailability data, and no phase I dose-escalation studies; any dose used in humans at present would be empirical and unsupported by safety evidence.
Does Solanum aculeastrum extract have antimicrobial properties against bacterial and fungal infections?
Yes, both fruit and leaf extracts of Solanum aculeastrum demonstrate antimicrobial activity against multiple bacterial and fungal strains at concentrations of 5 mg/mL or lower in laboratory studies. This antimicrobial effect is attributed to the plant's alkaloid and saponin content, which aligns with its traditional use in East African medicine for treating infectious conditions. However, clinical evidence in humans remains limited, and in vitro results do not automatically translate to therapeutic efficacy in the body.
What is the evidence for Solanum aculeastrum against Leishmania infections?
In vitro research shows that water and methanol extracts of Solanum aculeastrum fruits reduce Leishmania major amastigote infection rates in macrophages in a dose-dependent manner. This finding supports the plant's historical use in traditional African medicine for parasitic and infectious diseases. Additional clinical studies in humans are needed to establish therapeutic dosing and efficacy for leishmaniasis treatment.
Which form of Solanum aculeastrum—fruit or leaf—is more effective for antimicrobial and medicinal purposes?
Both fruit and leaf extracts of Solanum aculeastrum demonstrate antimicrobial properties, though most published research focuses on fruit extracts, particularly for antileishmanial activity. The choice between forms may depend on traditional preparation methods and local availability in regions where the plant is used medicinally. Direct comparative studies evaluating the efficacy of fruit versus leaf extracts are currently lacking in scientific literature.
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