Jervine (Veratrum Steroidal Alkaloid · Primary Teratogen · Hedgehog Pathway · Informational)
| Compound | Jervine |
| Chemical class | Alkaloid — Steroidal Alkaloid (Jervanine-type; 11-ketone Veratrum alkaloid) |
| CAS | 469-59-0 |
| Primary source | Veratrum californicum (California corn lily), Veratrum album (white hellebore) |
| Key applications | Informational reference — Sonic Hedgehog inhibitor; primary Veratrum teratogen; cyclopia induction |
| Claim strength | Emerging (research); Informational only |
| Typical form | Research chemical; not a supplement or pharmaceutical ingredient |
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Name origin: From the jervanine alkaloid sub-class of Veratrum steroidal alkaloids. Jervine is the 11-ketone homologue of cyclopamine (cyclopamine lacks this ketone) and is the primary teratogenic alkaloid of Veratrum californicum. Both jervine and cyclopamine inhibit Sonic Hedgehog (SHH) signalling via Smoothened (SMO) binding, but with different potency profiles — cyclopamine binds SMO more selectively; jervine has additional off-target effects. Historical and research context: Jervine was identified as a primary teratogen causing cyclopia in lambs in the 1960s–1970s (Keeler research programme). Like cyclopamine, jervine’s SHH inhibitory activity was later recognised as pharmacologically significant for cancer research. Jervine-derived synthetic analogues have been explored as pharmaceutical SMO inhibitors, contributing to the same drug discovery pipeline that produced vismodegib. Jervine itself is too potent a teratogen and has insufficient pharmacokinetic properties for pharmaceutical development. Supplement status: Jervine is a highly teratogenic compound with no safe supplement application.
Jervine — Research Context
Sonic Hedgehog inhibition — Smoothened binding: Jervine inhibits the Hedgehog pathway via SMO binding, similar to cyclopamine. In comparative studies, jervine has slightly lower SMO binding affinity than cyclopamine but additional effects on cholesterol transport that contribute to Hedgehog pathway disruption. Jervine has been used as a research tool for Hedgehog pathway studies alongside cyclopamine. Research reference only.
Teratogenicity — Veratrum primary teratogen: Jervine is considered the primary Veratrum californicum teratogen responsible for the cyclopia/holoprosencephaly observed in lambs. It is more readily absorbed and distributed than cyclopamine in the relevant teratological studies. Critical developmental window: sheep gestation days 10–15 (equivalent to human weeks 3–4 of pregnancy). Even trace exposure during this window can cause severe embryonic malformations. Critical safety information.
Cardiovascular toxicity: Jervine (along with other Veratrum alkaloids) activates sodium channels (voltage-gated Na+ channel agonism) causing bradycardia, hypotension, and potentially fatal cardiovascular depression. This cardiovascular toxicity mechanism is distinct from teratogenicity and affects non-pregnant individuals. It was the basis for early pharmaceutical interest in Veratrum alkaloids for hypertension treatment (now abandoned). Critical safety information.
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Frequently Asked Questions — Jervine
What is the difference between jervine and cyclopamine?
Both are Veratrum californicum steroidal alkaloids inhibiting the Hedgehog pathway via SMO. Jervine has a C-11 ketone; cyclopamine (11-deoxojervine) lacks it. Cyclopamine binds SMO with greater selectivity and has become the primary Hedgehog research tool. Jervine has additional sodium channel activating cardiovascular toxicity that cyclopamine lacks. Jervine is considered the primary Veratrum teratogen in sheep studies; both contribute to human teratogenic risk.
Has jervine been used in human clinical trials?
No — jervine’s combination of severe teratogenicity, cardiovascular toxicity, and unfavourable pharmacokinetics has prevented pharmaceutical development. The synthetic SMO inhibitors developed from the cyclopamine/jervine lead (vismodegib, sonidegib) have entirely replaced jervine in clinical contexts. Jervine is used only as a laboratory research tool for Hedgehog pathway studies.
Is Veratrum album (white hellebore) used in homeopathy?
Yes — Veratrum album is used in homeopathy at extreme dilutions (30C, 200C) where no molecules of the original substance remain. At homeopathic dilutions, there is no jervine exposure and no toxicity risk. Homeopathic Veratrum album preparations are completely different from any botanical extract containing actual Veratrum alkaloids. The informational reference applies to actual jervine exposure, not to homeopathic preparations where jervine is absent.
What should formulators know about Veratrum alkaloid contamination risks?
Veratrum species can be mistaken for edible plants — V. californicum has been confused with wild garlic (Allium ursinum) and wild onion. In Europe, V. album has been confused with yellow gentian (Gentiana lutea root). Formulators using botanical raw materials from mountainous regions where Veratrum grows should require botanical authentication (DNA barcoding or microscopic identification) to exclude Veratrum contamination of botanical materials. Cases of jervine/Veratrum alkaloid poisoning from adulterated gentian preparations have occurred.
Related compounds: Cyclopamine, Veratramine, Solanine, Colchicine
Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.
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