Toxic Plants Flashcards
What are the 6 acidic products caused by toxic plants?
Insoluble Ca oxalate, soluble oxalate, Isocupressic acid, Quinone, Tannic acid (tannin), Titerpene acid.
Name all plants in ARUM FAMILY (14)
Chinese evergreen Alocacia/elephant's ear Flamingo plant Jack-in-the pulpit Cuckoo pint, Caladium varieties Dumcane varieties Pothos/Dvil's ivy Cutleaf philodendron/Swiss cheese plant Philodendron varieties Peace lilly Skunk cabbage Arrowhead vine/Nephthytis Calla Lilly/Arum Lilly
What are the 3 families of Insoluble Ca oxalate?
Arum, Aralia, Palm
What is MOA of insoluble Ca oxalate? CS?
Plant stem > animals chew > penetration via NEEDLE SHAPED Ca oxalate.
CS: Irritation of lips, mouth, throat; V+.
Name all plants in ARALIA family (1)
Umbrella tree (warm climates)
Name all plants in PALM family (1)
Fishtail palm (not as common)
Name all plants that produce soluble oxalate (8).
Halogeton, Greasewood > 2 common in sheep (US).
Pig weed (accumulate nitrogen, liver failure).
Beet
Lamb’s quarters
Rhubarb
Sorrel and Soursop
Purslane
What is the MOA of soluble oxalate? CS?
Hypocalcemia, precipitation of Ca oxalates in soft tissues and kidney.
CS: hypocalcemia, kidney damage.
Name all plants that produce isocupressic acid (2)
Ponderosa pine, Monterey cypress
What is MOA of isocupressic acid? CS?
Vasoconstriction, decreased uterine blood flow > release of fetal CORTISOL > abortion (CS).
Which two families produces quinone? Name a plant from each family. MOA? CS?
St. John’s family - St John’s wort.
Buckwheat family - Buckwheat.
MOA: Primary photosensitization
CS: erythema, pruritus, edema, necrosis of skin (secondary infection).
Name two plants that produce tannic acid (Tannin). MOA? CS?
Oak tree (all parts are poisonous), Pride of Barbados (seed is most poisonous). MOA: tissue damage (GI lesions and kidney). CS: Cattle - constipation, brown urine, atony, anorexia, deprssion; Monogastrics - GI.
Which family produce Titerpene acid? Name one plant.
MOA? CS?
Vervain family - Lantana/yellow sage.
MOA: liver damage and hepatic photosensitization.
CS: depression, anorexia, D+, icterus, erythema of skin, necrosis and sloughing.
Ruminant susceptible and horse resistant.
What are the alkaloids produced by toxic plants? (13)
Colchicine Diterpene alkaloids Ergot alkaloid Indolizidine alkaloids (swainsonine) Lycorine Muscarine Piperidine alkaloids Pyridine alkaloids (nicotine and lobeline) Pyrrolizidine alkaloids Solanine and solanidine alkaloids Taxine alkaloids Tropane alkaloids (Atropine, hyoscine, hyoscyamine) Xanthine alkaloids (caffeine, theophylline, theobromide)
Which family are autumn crocus/meadow saffron, glory lilly/climbing lilly in? What toxins are produced? MOA? CS?
Lilly family. Colchicine.
MOA: Antimitotic (rapidly dividing cells are more sensitive).
CS: involves many organs.
Name two plants in Buttercup family. Which toxin is produced by this family? MOA? CS?
Larkspur/Delphinium, Monkshade/aconite.
Diterpene alkaloids.
MOA: Competitive blockade of the nicotinic R @ muscle endplate (Similar to curare).
CS: Sudden death, weakness, stiffness, staggering, bloating, recumbency collapse.
T/F. There is no tx for Buttercup family (Diterpene alkaloids).
False. USE PHYSOSTIGMINE.
What does ergot produce? MOA/CS?
Ergot alkaloid. Alkaloid.
Vasoconstriction and gangrene, uterine contraction.
MOA: inhibition of lysosomal enzymes, peripheral neuronal degeneration (via nitropropanol glycoside), abnormal hoof and hair (via Se). What family is this MOA of? What is the plant? Toxin? CS?
Legume family - Locoweed/milkvetches
Toxin: Indolizidine alkaloids (swainsonine).
CS: neuronal signs; infertility, congenital defects, heart failure, weight loss, decreased immunity.
What family are Narcissus, Kaffir lilly, spider lilly, barbados lilly/fire lilly, zephyr lilly/rain lilly, river lilly in? Toxin? MOA? CS?
Amaryllis family - Lycorine.
MOA: Emetic and purgative (bulb is most toxic).
CS: Anorexia, Salivation, V+/D+, hypotension, muscle tremors, seizures.
T/F. Amanita muscarina (poisonous mushroom) produces piperidine alkaloid and there is no tx for this mushroom.
False. Produces muscarine > stimulation of muscuranic cholinergic R, CNS stimulation (seizures).
Tx: atropine.
What do poison hemlock/Cali fern, Lupines, tobacco, tree tobacco, coyote tobacco produce? MOA? CS?
Piperidine alkaloids.
MOA: Nicotinic effects > starting with ganglionic and neuromuscular STIMULATION > ganglionic acid and neuromuscular BLOCKADE.
CS: Ataxia, incoordination, birth defects (malformation).
Name all plants in Nightshade family that produces pyridine alkaloids (3). Acidic/alkaline? MOA?
Tobacco plant, tree tobacco, lobelia.
MOA: nicotinic R @ autonomic ganglia, neuromuscular junction and synapses in the CNS (low doses cause depolarization, large doses cause blockade).
T/F. CS of pyridine alkaloids: rapid onset.
Early signs: SLUD, muscle twitching, weakness, dyspnea.
DEATH DUE TO RESP. FAILURE.
TRUE.
Which toxin is produced by Rattlebox/crotolaria (seed toxic), Senecio/groundsel/ragwort (weed toxic to horses)? What is MOA/CS?
Pyrrolizidine alkaloids.
MOA/CS: hepatotoxic > hepatogenic photosensitization and hepatoencephalopathy.
Name all the plants that are a nightshade family that produces solanine and solanidine alkaloids (5). MOA/CS?
Black nightshade, American nightshade, Eggplant, Tomato, Chinese lantern.
MOST TOXIC: BERRIES
MOA/CS: GI, CNS, respiratory, cardiac.
T/F. Japanese yew produces TAXINE alkaloids that are toxic to CV and resp.
False. CV AND GI.
What toxin do Jimsonweed/thornapple/angel’s, Devil’s trumpet, Angel’s trumpet, Henbane produce? MOA? CS?
Tropane alkaloids
MOA: Anti-muscuranic
CS: hypertension, increase IOP, mydriasis, seizures, death due to resp failure.
Tx: phystigmine
What are the two plants of xanthine alkaloids (caffeine, theophylline, theobromide)? MOA? CS?
Cocoa and Coffee.
MOA: blocking adenosine R, inhibiting phosphodiesterase.
CS: V+/D+, colic, seizures, muscle tremors, tachycardia, hypotension, urination.
What are FOUR plants that produce ANTHRAQUINONE? What is MOA/CS?
Cascara sagrada (from a small tree), Buckthorn, Coffee weed/senna, Aloe. MOA/CS: Purgative (Coffee weed/senna: + skeletal and cardiac muscle degeneration, urine may be coffee colored due to myoglobinuria > kidney damage; horses die from liver failrure)
What are the glycosidic toxins produced by plants?
Anthraquinone, Calcinogenic glycoside (Vit D analog), Carboxy-aractyloside (sulfated glycoside), Cardiac glycoside, Coumarin glycoside, Cyanogenic glycosides, Cycasin, Glucosinolate (thiocynate glycoside), Nitropropanol glycoside, Phytoestrogens, Protoanemonin, Ptaquiloside, Steroidal saponins
What do Day-blooming Jasamine and Turkey berry produce? What is MOA/CS?
Calcinogenic glycoside (Vit D analog). MOA/CS: Hypercalcemia
T/F. Cocklebur produces cardiac glycoside.
False. Produces Carboxy-atractyloside (Sulfated glycoside).
MOA/CS: HEPATOTOXICITY, excessive salivation, renal damage, hypoglycemia.
Which plants produce cardiac glycoside? (9) What is MOA/CS?
Foxglove, Oleander, Yellow oleander/lucky nut/be-still tree, squill, Lilly of the valley, milkweed, kallanchoe (common).
MOA/CS: Cardiotoxic by inhibiting Na/K ATPase.
T/F. Sweet clover produces coumarin glycoside. It forms dicoumarol in spoiled plants and inhibit vit K epoxide reductase > deficiency of coag factors 2,7,9,10. This will cause hemorrhage (just like warfarin mechanism).
True.
How do you treat coumarin glycoside?
Give factors through blood/plasma transfusion > if stable, give Vit. K.
What are the THREE plants that produce cyanogenic glycosides? What is MOA/CS for acute vs. chronic?
Wild cherries, Johnson grass/Sudan grass/sorghum, Elderberry.
MOA/CS:
Acute: inhibition of cytochrome oxidase and cellular respiration, glycolysis, citric acid; Vasoconstriction; irritation of MM.
Chronic: neuronal degeneration
What are the TWO families that produce cycasin?
Cycad family and Zamiaceae.
T/F. Sago palm and Japanese cycad are within Zamiaceae family. Cardboard palm and Coontie are are within Cycad family.
False.
Sago palm and Japanese cycad: Cycad family.
Cardboard palm and Coontie: Zamiaceae family.
What is MOA of cycasin? CS?
MOA: 3 toxins - Cycasin, BMAA, unknown.
Cycasin: GI irritation, liver damage, teratogenic, mutagenic, carcinogenic.
BMAA: neurotoxic AA.
Unknown: axonal degeneration in CNS.
CS: GI and liver dz; ataxis and CNS syndrome.
T/F. Animals that get toxicated by cycasin rarely survives. Also, CS depends on the amount and duration.
True.
What do rape seed, kale, broccoli, brussel, spouts, cabbage, turnip, cauliflower, soybean, flax produce? What is MOA/CS?
Glucosinolate (thiocynate glycoside).
MOA: interferes with I- transfer > hormone can’t be made.
CS: Antithyroid sign.
Which plants produce nitropropanol glycoside (4). What is MOA?
Milkvetch, Violets, Lotus, Indigo.
MOA: Inhibits enzyme of the Krebs cycle and cellular oxidative phosphorylation.
T/F. Nitropropanol glycoside causes resp. and neurologic signs in horses and rodents. Causes only neurologic signs in cattle and sheep.
False.
Causes resp. and neurologic signs in cattle and sheep. Only neurologic signs in horses and rodents.