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Plant Profiler

Sea buckthorn (Hippophae rhamnoides)


Sea buckthorn (Hippophae rhamnoides) Image
Synonyms / Common Names / Related Terms
5-formyltetrahydrofolate, 5-hydroxytryptamine, 5-methyltetrahydrofolate, acetic acid, aekol, alkaloids, almindelig havtorn (Danish), alpha-linolenic acid, amino acid, Amritscherl (German), anthocyanin, arabinose, argasse, argasse (French), argouse (French), argousier (French), artificial sea-buckthorn oil, ascorbic acid, ash, Audorn (German), baie d'argousier (French), baie d'hippophaé (French), beta-sitosterol, beta-carotene, buckthorn, caffeic acid, campherol, carbohydrates, carotene, carotenoid, carotenoids, catechin, cinnamic acid, citric acid, common sea-buckthorn, dehydroascorbic acid, dhar-bu (Lao (Sino-Tibetan)), dhurchuk (Hindi), duindoorn (Dutch), Dünendorn (German), Elaeagnaceae (family), Elaeagnus rhamnoides (L.) A. Nelson, espinheiro-marítimo (Brazilian Portuguese), espino armarillo (Spanish), espino falso (Spanish), Fasanbeere (German), fat, ferulic acid, fiber, finbar (Swedish), finnbär (Swedish), flavo-glycoside, flavones, flavonoid, flavonoids, flavonol aglycones, flavonols, folate vitamers, fruit acid, galactose, gallic acid, Gemeiner Sanddorn (German), Gewöhnlicher Sanddorn (German), glucose, grisset, Haffdorn (German), hafþyrnir (Icelandic), harmalol, harmol, havtidse (Danish), havtorn (Swedish), havtorn (Danish), Hippophae angustifolia Lodd., Hippophae littoralis Salisb., Hippophae rhamnoides cv. Indian Summar, Hippophae rhamnoides oil, Hippophae rhamnoides, Hippophae rhamnoideum Saint-Lager, Hippophae sibirica Lodd., Hippophae stourdziana Szabó, homoktövis (Hungarian), isolinoleic acid, isorhamnetin, kaempherol, kárpáti homoktövis (Hungarian), klintepil (Danish), klittorn (Danish), Korallenbeere (German), L-ascorbic acid, leucocyanidin, leucodelphinidin, linoleic acid, linolenic acid, lycopene, malic acid, mannitol, meerdorn, mineral salt, minerals, myricetin, oblepikha, oil, oleic acid, oleum Hippophae, olivella spinosa (Italian), Osyris rhamnoides Scop., paeonin, palmitic acid, palmitoleic acid, p-coumaric acid, pectin, pentamethylquercetin, phenolic acids, phosphatides, p-hydroxybenzoic acid, phylloquinone, physalien, Prielbrusie, proteins, protocatechuic acid, pulp oil, purging thorn, quercetin, quinic acid, rakytník řešetlákovitý (Czech), Rhamnoides hippophae Moench, rhamnose, rokitnik, rokitnik zwyczajny (Polish), Rote Schlehen (German), saccharose, salicylic acid, sallow thorn, Sandbeere (German), Sanddorn (German), sandthorn, sandtidse (Danish), sandtidsel (Danish), sandtorn (Danish), sceitbezien, seabuckthorn, sea-buckthorn, seabuckthorn oil, sea-buckthorn oil, seabuckthorn powder, seed oil, seed residues of Hippophae rhamnoides L, Seedorn (German), serotonin, sha ji (Chinese), shaji (Chinese), silverbuske (Swedish), star-bu (Lao (Sino-Tibetan)), stearic acid, sterols, støggved (Norwegian), Stranddorn (German), succinic acid, sugar, syringetin, tænnved (Norwegian), tannic acid, tanning agents, terpenoids, tetrahydrofolate, tindved (Danish), tindved (Norwegian), tinnan (Norwegian), tinne (Norwegian), tinnved (Norwegian), tocopherol, tocopherols, tocotrienols, tørn (Norwegian), tornan (Norwegian), tørri (Norwegian), total flavones of Hippophae rhamnoides L (TFH), trans-reservatrol, tyrni (Finnish), unsaturated fatty acids, vanillic acid, vitamin B, vitamin B12, vitamin C, vitamin E, water, Weidendorn (German), Weisseldorn (German), xanthophylls, yellow spine, zeaxanthin.

Note: Sea buckthorn (Hippophae rhamnoides) should not be confused with alder buckthorn (Rhamnus frangula), common buckthorn (Rhamnus cathartica), or cascara/California buckthorn (Rhamnus purshiana), although these plants have similar common names.

Mechanism of Action

Pharmacology:

  • Constituents: Sea buckthorn (Hippophae rhamnoides L.) contains vitamin E33, beta-carotene , chrysin, sterols, polyunsaturated fatty acids, free amino acids, flavonols (especially pentamethylquercetin, syringetin, isorhamnetin, quercetin, kaempherol, and myricetin), tocopherols, tocotrienols, phenolic acids (including gallic acid, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, salicylic acid, p-coumaric acid, cinnamic acid, caffeic acid, and ferulic acid), phylloquinone, trans-resveratrol, catechin, vitamin C 16,7,11,29,5,34,35,36,37,38,39,33, and elemental components9. One in vitro study has shown a potential intra-herb pharmacokinetic interaction between quercetin and isohamentin (two flavonols found in sea buckthorn).40 The major fatty acids in the seed oil are linoleic (34%), fishoil (25%), and oleic (19%) acids, whereas the major fatty acids in the pulp oil are palmitic (33%), oleic (26%), and palmitoleic (25%) acids.1,5 Sea buckthorn contains folate vitamers, and during processing of sea buckthorn berries to concentrate some were degraded (tetrahydrofolate and 5-formyltetrahydrofolate) while others remained intact (5-methyltetrahydrofolate).41 According to secondary sources, sea buckthorn also contains vitamin C (1,500mg/100g), 20 micro elements, and 200 bioactive substances, including 5-hydroxytryptamine, acetic acid, alkaloids, amino acid, anthocyanin, arabinose, ascorbic acid, ash, beta-sitosterol, beta-carotene, campherol, carbohydrates, carotene, citric acid, dehydroascorbic acid, fat, fiber, flavo-glycoside, flavones, flavonoids, galactose, glucose, harmalol, harmol, isolinoleic acid, isorhamnetin, leucocyanidin, leucodelphinidin, linoleic acid, linolenic acid, lycopene, malic acid, mannitol, minerals, oil, oleic acid, paeonin, palmitic acid, pectin, phosphatides, physalien, proteins, quinic acid, rhamnose, saccharose, serotonin, stearic acid, succinic acid, sugar, tannic acid, terpenoids, unsaturated fatty acids, vitamin B, vitamin B12, water, xanthophylls, and zeaxanthin.
  • In a survey of juices from seven sea buckthorn (Hippophae rhamnoides L.) varieties, total sugar (fructose and glucose) varied from 1.9 to 7.1g/100mL, total acid (malic and quinic acids) from 3.1 to 5.1g/100mL, vitamin C from 29 to 176mg/100mL, and pulp oil from 0.7 to 3.6%.42 The soluble solids were between 7.4 and 12.6, the pH between 2.7 and 2.9, and the titrable acidity between 2.0 and 3.7.
  • Antibacterial activity: In an in vitro study using five clinical strains of Helicobacter pylori, the ethanol extract of sea buckthorn inhibited all test strains (MIC close to 60.0mcg/mL).3
  • Anticancer activity: In in vitro studies, extracts of sea buckthorn have shown dose- and time-dependent anticancer effects.7,10,11,8,43 This may be achieved through co-regulating of intracellular and extracellular signal transduction pathways, ultimately inducing apoptosis.10,11,8 Sea buckthorn berries have also shown antiproliferative activity in vitro in some studies6but not in others44.
  • Antioxidant activity: Available information on the antioxidant activity of sea buckthorn is contradictory. In several laboratory assays and animal studies, sea buckthorn has shown antioxidant activity6,29,30,14,31,32,20,18,45,46, and in other in vitro studies, a lack of such an effect has been observed47. However, when human subjects ingested a combination of oatmeal porridge and sea buckthorn flavonols, there was no statistically significant effect on plasma antioxidant potential, nor was there a significant effect on the levels of oxidized low-density lipoprotein.16 In another placebo controlled trial of 20 healthy men, ingestion of sea buckthorn juice for eight weeks moderately decreased the susceptibility of LDL to oxidation.4
  • Antiplatelet activity: Various extracts of sea buckthorn may affect platelet aggregation differently. In a placebo controlled trial of 20 healthy men, ingestion of sea buckthorn juice for eight weeks did not change platelet aggregation or plasma intercellular cell adhesion molecule 1 (ICAM-1) levels when the treatment groups were compared.4 However, in a randomized crossover study in 12 normolipidemic men, ingestion of sea buckthorn berry oil 5g daily for four weeks decreased the rate of adenosine-5'-diphosphate-induced platelet aggregation and maximum aggregation when compared with the fractionated coconutoil control.5 In a mouse thrombosis model and in vitro studies, sea buckthorn flavones prevented in vivo thrombogenesis and reduced whole blood platelet aggregation.22
  • Antiulcer activity: In an animal study, sea buckthorn seed and fruit oil reduced ulcer formation in rats.27 Animal study has shown that the procyanidins in sea buckthorn may help heal gastric ulcers.48 In rats, sea buckthorn pulp oil can inhibit gastric acid and pepsin secretion.28
  • Antiviral activity: When compared to the traditional dengue fever treatment (the commercially available anti-viral drug Ribavirin®), sea buckthorn showed similar anti-dengue activity as evidenced by its ability to maintain the cell viability of infected cells along with decreases in TNF-alpha and increases in IFN-gamma.12
  • Cardiovascular effects: In in vitro study, the total flavones of Hippophae rhamnoides had inhibitory effects on angiotensin-converting enzyme (ACE) activity and on angiotensin II formation in rabbit aortic smooth muscle cells.2 Total flavones extracted from seed residues of sea buckthorn have shown antihypertensive effects that may be modulated at least in part by improving insulin sensitivity and blocking the angiotensin signaling pathway.49 In animal study, flavonoids from sea buckthorn have been found to significantly reduced serum cholesterol and serum triglyceride levels.17,11 However, in human study, sea buckthorn has been reported to elevate high-density lipoprotein (HDL) levels16,1, but no effect was noted on paraoxonase activity16. Low-density lipoprotein (LDL) levels have not been altered in clinical study.16,4 Ingestion of sea buckthorn berry oil 5g daily for four weeks did not affect phospholipid fatty acids or plasma lipids when compared with the fractionated coconutoil control in randomized controlled study in normolipidemic men.5
  • Hippophae rhamnoides L. has not been found to alter sympathetic activity in the treatment of hypertension based on human study.26 Its inhibitory effects were noted, however, after supine isometric exercise.26 Animal studies have shown that sea buckthorn improved the metabolic processes accompanied by reduction of hypertensive stress on the ventricular microvessels in hypertensive/stroke-prone rats50.
  • In vivo studies have demonstrated that sea buckthorn extract may help to protect the myocardium from ischemia through the regulation of various proteins.51 Another study in rats showed that sea buckthorn significantly improved hypoxic tolerance, as evidenced by increased hypoxic gasping time and survival time, and decreased plasma catecholamine levels, as compared to hypoxic animals.52
  • In a clinical trial, a reductive effect on CRP, a marker of inflammation and a risk factor for cardiovascular diseases, was detected in response to treatment with sea buckthorn berries.13
  • Cold stress reduction effects: In a preliminary study in cold-sensitive humans, oral administration of 500mg of sea buckthorn alcoholic extract daily for three months reduced the cardiovascular reactivity to cold stress.19 Studies in animals have shown that sea buckthorn extract may allow for a shift in anaerobic metabolism to aerobic during cold-hypoxia-restraint exposure by affecting several key metabolic enzymes.53
  • Endocrine effects: In a randomized crossover study in 12 normolipidemic men, ingestion of sea buckthorn berry oil 5g daily for four weeks did not affect plasma glucose when compared with the fractionated coconutoil control.5 However, in healthy mice, flavonoids from sea buckthorn significantly reduced serum glucose levels.17 The mechanism by which sea buckthorn lowers glucose is not well understood.
  • Hematological effects: In patient with acute blood stasis, one study found that sea buckthorn was able to recover to control levels; the authors suggest that significant changes in some metabolites such as cholic acid, phenylalanine, and kynuerenic acid may be possible mechanisms for this effect.54
  • Hepatoprotective activity: In human study, sea buckthorn has been shown to reduce serum levels of laminin, hyaluronic acid, collagen types III and IV, and total bile acid compared to the control group.25 In addition, the sea buckthorn treatment notably shortened the duration for normalization of aminotransferases. In in vitro study using tissue and serum from rats with induced toxic lesions of the liver, sea buckthorn increased the proportion of tissular and serumal proteins and protected cytochrome P450 enzymes from damage.14 An in vivo animal study supports this result.15
  • Immunomodulation activity: In an in vitro study, sea buckthorn alcoholic leaf and fruit extracts showed immunomodulation activity.18,24 In animal study, mice administered an alcoholic extract of sea buckthorn and exposed to lethal whole body Co-60-gamma irradiation had enhanced viable counts of macrophages, compared to those that did not receive the sea buckthorn.23 Mice that received the sea buckthorn and no radiation also had higher macrophage counts than nonirradiated mice without sea buckthorn.
  • Physical performance: Studies in rats have shown that sea buckthorn may be effective in enhancing physical performance activity during avoidance learning; however, it had no effect on cognitive function.55 The mechanism for these effects is not well understood.
  • Vulnerary activity: In animal study, sea buckthorn increased wound healing.21,56

Pharmacodynamics/Kinetics:

  • Absorption: In a clinical trial, sea buckthorn flavonols were rapidly absorbed when administered with oatmeal porridge, and a small amount of sea buckthorn oil seemed to increase the bioavailability of additional sea buckthorn flavonols.16

References

  1. Yang, B., Kalimo, K. O., Mattila, L. M., Kallio, S. E., Katajisto, J. K., Peltola, O. J., and Kallio, H. P. Effects of dietary supplementation with sea buckthorn (Hippophae rhamnoides) seed and pulp oils on atopic dermatitis. J Nutr Biochem  1999;10(11):622-630. 15539258
  2. Zhu, F., Zhang, M. S., and Wang, J. L. Inhibitory effect of total flavones of Hippophae rhamnoides L on angiotensin converting enzyme from rabbit. Chinese Journal of Clinical Pharmacy (China) 2000;9:95-98.
  3. Li, Y., Xu, C., Zhang, Q., Liu, J. Y., and Tan, R. X. In vitro anti-Helicobacter pylori action of 30 Chinese herbal medicines used to treat ulcer diseases. J Ethnopharmacol 4-26-2005;98(3):329-333. 15814268
  4. Eccleston, C., Baoru, Y., Tahvonen, R., Kallio, H., Rimbach, G. H., and Minihane, A. M. Effects of an antioxidant-rich juice (sea buckthorn) on risk factors for coronary heart disease in humans. J Nutr Biochem  2002;13(6):346-354. 12088800
  5. Johansson, A. K., Korte, H., Yang, B., Stanley, J. C., and Kallio, H. P. Sea buckthorn berry oil inhibits platelet aggregation. J Nutr Biochem  2000;11(10):491-495. 11120446
  6. Boivin, D., Blanchette, M., Barrette, S., Moghrabi, A., and Beliveau, R. Inhibition of cancer cell proliferation and suppression of TNF-induced activation of NFkappaB by edible berry juice. Anticancer Res 2007;27(2):937-948. 17465224
  7. Teng, B. S., Lu, Y. H., Wang, Z. T., Tao, X. Y., and Wei, D. Z. In vitro anti-tumor activity of isorhamnetin isolated from Hippophae rhamnoides L. against BEL-7402 cells. Pharmacol Res 2006;54(3):186-194. 16765054
  8. Sun, B., Zhang, P., Qu, W., Zhang, X., Zhuang, X., and Yang, H. [Study on effect of flavonoids from oil-removed seeds of Hippophae rhamnoides on inducing apoptosis of human hepatoma cell]. Zhong Yao Cai  2003;26(12):875-877. 15058208
  9. Zeb, A. Anticarcinogenic potential of lipids from Hippophae--evidence from the recent literature. Asian Pac.J Cancer Prev  2006;7(1):32-35. 16629511
  10. Zhang, P., Mao, Y. C., Sun, B., Qian, M., and Qu, W. J. [Changes in apoptosis-related genes expression profile in human breast carcinoma cell line Bcap-37 induced by flavonoids from seed residues of Hippophae Rhamnoides L]. Ai Zheng  2005;24(4):454-460. 15820069
  11. Hibasami, H., Mitani, A., Katsuzaki, H., Imai, K., Yoshioka, K., and Komiya, T. Isolation of five types of flavonol from seabuckthorn (Hippophae rhamnoides) and induction of apoptosis by some of the flavonols in human promyelotic leukemia HL-60 cells. Int J Mol Med 2005;15(5):805-809. 15806302
  12. Jain, M., Ganju, L., Katiyal, A., Padwad, Y., Mishra, K. P., Chanda, S., Karan, D., Yogendra, K. M., and Sawhney, R. C. Effect of Hippophae rhamnoides leaf extract against Dengue virus infection in human blood-derived macrophages. Phytomedicine  2008;15(10):793-799. 18586478
  13. Larmo, P., Alin, J., Salminen, E., Kallio, H., and Tahvonen, R. Effects of sea buckthorn berries on infections and inflammation: a double-blind, randomized, placebo-controlled trial. Eur J Clin Nutr  2008;62(9):1123-1130. 17593932
  14. Mansurova, I. D., Linchevskaia, A. A., Molchagina, R. P., and Bobodzhanova, M. B. [Oleum hippophae, a stabilizer of biological membranes]. Farmakol Toksikol  1978;41(1):105-109. 564286
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  17. Cao, Q., Qu, W., Deng, Y., Zhang, Z., Niu, W., and Pan, Y. [Effect of flavonoids from the seed and fruit residue of Hippophae rhamnoides L. on glycometabolism in mice]. Zhong Yao Cai  2003;26(10):735-737. 14768393
  18. Geetha, S., Sai, Ram M., Singh, V., Ilavazhagan, G., and Sawhney, R. C. Anti-oxidant and immunomodulatory properties of seabuckthorn (Hippophae rhamnoides)--an in vitro study. J Ethnopharmacol  2002;79(3):373-378. 11849845
  19. Dubey, G. P., Agrawal, A., and Dixit, S. P. Role of Seabuckthorn (Hippophae rhamnoides) in the maintenance of cardiovascular homeostasis following cold stress. Journal of Natural Remedies 2003;3:36-40.
  20. Gupta, R. and Flora, S. J. S. Protective effects of fruit extracts of Hippophae rhamnoides L. against arsenic toxicity in Swiss albino mice. Human & Experimental Toxicology 2006;25(6):285-295.
  21. Ianev, E., Radev, S., Balutsov, M., Klouchek, E., and Popov, A. [The effect of an extract of sea buckthorn (Hippophae rhamnoides L.) on the healing of experimental skin wounds in rats]. Khirurgiia (Sofiia) 1995;48(3):30-33. 8667579
  22. Cheng, J., Kondo, K., Suzuki, Y., Ikeda, Y., Meng, X., and Umemura, K. Inhibitory effects of total flavones of Hippophae Rhamnoides L on thrombosis in mouse femoral artery and in vitro platelet aggregation. Life Sci  4-4-2003;72(20):2263-2271. 12628446
  23. Prakash, H., Bala, M., Ali, A., and Goel, H. C. Modification of gamma radiation induced response of peritoneal macrophages and splenocytes by Hipophae rhamnoides (RH-3) in mice. Journal of Pharmacy and Pharmacology (England) 2005;57:1065-1072.
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  25. Gao, Z. L., Gu, X. H., Cheng, F. T., and Jiang, F. H. Effect of sea buckthorn on liver fibrosis: a clinical study. World J Gastroenterol  2003;9(7):1615-1617. 12854177
  26. Zhang, X., Zhang, M., Gao, Z., Wang, J., and Wang, Z. [Effect of total flavones of Hippophae rhamnoides L. on sympathetic activity in hypertension]. Hua Xi Yi Ke Da Xue Xue Bao  2001;32(4):547-550. 12528545
  27. Xing, J., Yang, B., Dong, Y., Wang, B., Wang, J., and Kallio, H. P. Effects of sea buckthorn (Hippophae rhamnoides L.) seed and pulp oils on experimental models of gastric ulcer in rats. Fitoterapia 2002;73(7-8):644-650. 12490224
  28. Xing, J. F., Hou, J. Y., Dong, Y. L., and Wang, B. W. Effects on gastric secretion and anti-gastric ulcer action of sea buckthorn pulp oil in rats. Journal of China Pharmacy (China) 2003;14:461-463.
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