CRINUM; AN ENDLESS SOURCE OF BIOACTIVE PRINCIPLES: A REVIEW. PART 1- CRINUM ALKALOIDS: LYCORINE-TYPE ALKALOIDS
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John Refaat*1, Mohamed S. Kamel 1, Mahmoud A. Ramadan 2 and Ahmed A. Ali 2
Pharmacognosy Department, Faculty of Pharmacy, Minia University 1, 61519 Minia, Egypt
Pharmacognosy Department, Faculty of Pharmacy, Assiut University 2, 71515 Assiut, Egypt
ABSTRACT
Crinum is an important Amaryllidaceous plant thanks to the valuable biological and therapeutic activities of its chemical constituents, especially alkaloids. Many Crinum species have been commonly used in traditional medicines worldwide. Long ago, they have been subjected to extensive chemical, cytological and pharmacological investigations. Accordingly, this work comprehensively comprises both the alkaloidal and non-alkaloidal principles of Crinums isolated from 1950 and up to now, together with various biological and toxicological studies conducted on both the total extracts and individual compounds. As being a major common class of Crinum alkaloids, the current part of this review work highlights the lycorine-type alkaloids isolated so far from this plant in addition to their distribution in different Crinum species.
Keywords:Alkaloids,
Amaryllidaceae, Chemical constituents, Crinum, |
Lycorine
INTRODUCTION:Amaryllidaceae is a great widely spread family all over the world and contains about 90 genera and 1310 species 1. The genus Crinum represents an important sector in family Amaryllidaceae with wide geographical distribution throughout the tropics, subtropics and warm temperate regions of the world 2. The name Crinum originates from the Greek "Krinon", which means "white lily", and they are commonly known as “Milk, river, or veld lilies”. This genus is related to a group of mostly southern African endemic genera, constituting the tribe Amaryllideae 3.
Like other members of Amaryllidaceae, Crinums can occupy many different habitats such as seasonally dry places, ephemeral pools, rainforests, coastal areas and rivers' banks. Worldwide, Crinum comprises about 130 species distributed in Africa, America, southern Asia and Australia. African lands enjoy most species and about twenty-two are endemic to Southern Africa.
However, recent regional revisions of African taxa indicated that around half this number (130 species), would be a better approximation 4. The uncertainty about their numbers is attributed to the difficulty in naming species correctly and the high possibilities of hybridization between different species. Botanically, Crinums are perennial herbaceous plants with giant fleshy bulbs larger in stature than most other species of Amaryllidaceae. They can grow from 1-5 feet in height depending on the species and produce a neck or a pseudo stem made up of the sheathing old leaves. Flowers usually appear in May, June or August 5.
Worldwide, Crinums have a great economic value as ornamentals due to their showy flowers. In addition, huge numbers of them are traded for traditional medicines. Crinums attract considerable attention due to their various medicinal properties such as antitumor, immunostimulating, analgesic, antiviral, antimalarial, antibacterial and antifungal activities.
Since about 1950s, Crinums have been subjected to extensive chemical, cytological and pharmacological investigations due to their richness in pharmacologically active principles 6. Phytochemical investigations have resulted in isolation of several diverse classes of compounds and have been focused predominantly on alkaloids. Phenolics prevail among the non-alkaloidal constituents identified 7.
Consequently, this work represents a comprehensive account on various classes of Crinum alkaloidal and non-alkaloidal constituents together with their structural and stereochemical differences. Additionally, their distribution in various Crinum species studied so far (Table 1) is also completely considered (out of around 130 species, only about 35 have been phytochemically investigated). The first part of our review work will concentrate on lycorine-type alkaloids as one of the most common Crinum alkaloids.
TABLE 1: A LIST OF PHYTOCHEMICALLY INVESTIGATED CRINUM SPECIES
Species | Species | ||
C. amabile Donn. | C. lugardiae N.E.Br. | ||
C. americanum L. | C. macowanii Baker | ||
C. asiaticum Linn. (syn. C. giganteum) | C. macrantherum Engl. | ||
C. asiaticum var. japonicum Baker | C. moorei Hook F. | ||
C. asiaticum var. sinicum Baker | C. natans Linn. | ||
C. augustum Rox. | C. oliganthum Urban | ||
C. bulbispermum Milne. | C. ornatum (L. f. ex Aiton) | ||
C. defixum Ker. | C. powelli Hort.(Hybride of C. moorei x C. longifolium) | ||
C. delagoense Verdoom | C. powelli Hort. var. album | ||
C. erubescens Ait. | C. powelli Hort. var. harlemense | ||
C. firmifolium Baker | C. powelli Hort. var. krelagei | ||
C. firmifolium var. hygrophilum Baker | C. pratense Herb. (syn. C. longifolium) | ||
C. glaucum Chevalier | C. purpurascens | ||
C. Jagus Dandy | C. scabrum Herb. | ||
C. kirkii Baker | C. stuhlamanii Baker | ||
C. kunthianum Roem. | C. yemense Defl. | ||
C. latifolium Linn. | C. zeylanicum Linn. | ||
C. laurentii Durand and Dewild |
Crinum and Amaryllidaceae alkaloids: Amaryllidaceae is divided into four subfamilies; the Agavoideae, Amaryllidoideae, Campynematoideae and Hypoxidoideae. Alkaloids have only been found in subfamily Amaryllidoideae 8. It contains about nine chief different classes of alkaloids. The chemical structures of the so called “Amaryllidaceae alkaloids” are restricted to this family and have limited taxonomic distribution 9:
- N-Benzyl-N-(β-phenethylamine) nucleus (Belladine-type).
- 2-Benzopyrano-(3, 4 g)-indole nucleus (Lycorenine-type).
- Pyrrolophenanthridine nucleus (Lycorine-type).
- Dibenzofuran nucleus (Galanthamine-type).
- 5, 10 b-Ethanophenanthridine nucleus (Crinine-type)
- 2- Benzopyrano- (3, 4 c)- indole nucleus (Tazettine-type).
- 5, 11-Methanomorphanthridine nucleus (Montanine-type).
- Benzylisoquinoline nucleus (Cherylline-type).
- Phenanthridone nucleus (Narciclasine-type).
The genus Crinum is a true representative of the family as it exhibits all the main chemical traits of Amaryllidaceae. About 180 alkaloids belonging to different types of Amaryllidaceae alkaloids have been isolated and identified. Crinine-, lycorine- and tazettine-types are the most common groups among the isolated alkaloids, while montanine-type has not yet been found in Crinum species 10.
In addition to these common types of Amaryllidaceae alkaloids, Crinums yielded other types that are not common in the family e.g. Augustamine- 11-13, β-carboline- 12, Phenanthridine- 12, 14, Sceletium- 15, Ismine- 14, 16, 17 and Clivimine- 16 type alkaloids.
The isolated lycorine-type alkaloids from different Crinum species are depicted in Table 2 and Figure 1.
TABLE 2: A LIST OF LYCORINE-TYPE ALKALOIDS ISOLATED FROM DIFFERENT CRINUM SPECIES
Alkaloid name | Molecular Formula | mp (˚C) / [α]D | Plant source | Plant parts | References | |
1 | C18H19NO4 | C. moorei Hook F. | --- | 18 | ||
2 | 1-O-Acetyl-lycorine. | C18H19NO5 | C. kirkii BakerC. latifolium Linn.
C. macowanii Baker C. moorei Hook F.
C. powellii var. album |
BulbsBulbs
Whole plant Seeds Whole plant Bulbs |
1319
20, 21 22 21, 23 24 |
|
3 | 2-O-Acetyl-lycorine. | C18H19NO5 | 180–182˚/–8.72˚ (CHCl3) | C. augustum Rox.C. kirkii Baker | BulbsBulbs | 2513 |
4 | Anhydrolycorine-7-one. | C16H11NO3 | 228 –230˚ | C. pratense | 26 | |
5 | C16H17NO3 | C. laurentii Durand & Dew.C. powellii Hort. var. album
C. powellii Hort. var. krelagei |
Bulbs---
--- |
2728
26 |
||
6/6′ | Compound 2a/2b. | C69H118NO12P | C. asiaticum L. | Fruits | 29 | |
7/7′ | Compound 3a/3b. | C69H120NO12P | C. asiaticum L. | Fruits | 29 | |
8 | C17H15NO3 | C. asiaticum L. | Fruits | 29 | ||
9 | Criasiaticidine A. | C15H9NO3 | C. asiaticum var. japonicum | Bulbs | 30 | |
10 | 4,5-Dehydro-anhydrolycorine. | C16H11NO2 | C. latifolium Linn. | Flower stems | 31 | |
11 | 9-O-Demethyl-pluviine. | C16H19NO3 | 199–200˚ / –168˚ (MeOH) | C. stuhlamanii Baker | Bulbs | 32 |
12 | 8-O-Demethyl-vasconine. | C16H14NO2 | 200–202˚ | C. kirkii Baker | Bulbs | 33 |
13 | (-)-1,2-O-Diacetyl-lycorine | C20H21NO6 | 212–213˚ | C. kirkii BakerC. latifolium Linn.
C. moorei Hook F. |
BulbsBulbs
Seeds |
1319
22 |
14 | (-)-2-Epilycorine. | C16H17NO4 | 168–170˚ / –212.8˚ (MeOH) | C. latifolium Linn. | Flower stems | 31 |
15 | 2-Epipancrassidine. | C16H17NO5 | 207–210˚ / –112.5˚ (MeOH) | C. latifolium Linn. | Flower stems | 31 |
16 | C18H23NO4 | 166–167˚ / –81.6˚ (EtOH) | C. amabile Donn.C. defixum Ker.
C. laurentii Durand and Dewild C. moorei Hook. F. C. powellii Hort. var. harlemense |
BulbsBulbs
--- Bulbs Bulbs |
3427
35 36 18 |
|
17 | C15H9NO3 | C. bulbispermum Milne. | Bulbs | 37 | ||
18 | Hippadine (pratorine). | C16H9NO3 | 213–215˚ /+27.5˚ (CHCl3) | C. americanum L.C. asiaticum L.
C. augustum Rox. C. bulbispermum Milne. C. kirkii Baker C. kunthianum Roem. C. latifolium Linn. C. powellii Hort. C. pratense C. purpurascens |
BulbsBulbs
Bulbs Bulbs Bulbs Leaves Bulbs --- Leaves --- |
3839
40, 41 42 13 43 44 45 26 46 |
19 | C17H19NO4 | C. bulbispermum Milne. | Bulbs | 47 | ||
20 | 8-Hydroxylycorine-7-one | C16H15NO6 | C. bulbispermum Milne. | Bulbs | 47 | |
21 | C16H9NO4 | C. asiaticum L.C. augustum Rox. | ------ | 1010 | ||
22 | (+)-Kirkine. | C16H19NO3 | 170–172˚ /+59.6˚(MeOH) | C. kirkii BakerC. stuhlamanii Baker | BulbsBulbs | 13, 3332 |
23 |
(-)-Lycorine (Narcissine, Galanthidine, Amarylline, Bellamarine). |
C16H17NO4 |
260–262˚ / – 83.8˚ (EtOH) –71.2˚ (MeOH)
|
C. amabile Donn.C. americanum L.
C. asiaticum L. C. asiaticum var. japonicum
C. augustum Rox.
C. bulbispermum Milne.
C. defixum Ker. C. delagoense Verdoorn C. erubescens Ait. C. firmifolium var. hygrophilum C. glaucum Chevalier C. Jagus Dandy C. kirkii Baker C. kunthianum Roem. C. latifolium Linn. C. laurentii Durand & Dew. C. lugardiae N.E.Br. C. macowanii Baker
C. macrantherum Engl. C. moorei Hook F.
C. ornatum (L. f. ex Aiton) C. powellii Hort. C. powellii Hort. var. album C. powellii Hort. var. harlemense C. powellii Hort. var. krelagei C. pratense C. scabrum Herb. C. stuhlamanii Baker C. yemense Defl. C. zeylanicum Linn. |
BulbsBulbs
Leaves, Bulbs Bulbs Aerial parts
Whole plant Bulbs Bulbs Whole plant Bulbs Bulbs Bulbs Whole plant Bulbs Bulbs Bulbs Leaves Bulbs, Flower stems --- Bulbs, Roots Bulbs Whole plant Leaves Seeds Whole plant Bulbs Bulbs Bulbs --- Bulbs --- Whole plant Bulbs Bulbs Bulbs |
34, 48, 497, 38
39, 50 30 51
52 25 42 21 53 54 55 14 56 56, 57 13 43 31, 44 27 58 59 20, 21, 60 61 22 21, 23 62 18 28 63 28 26 53 32 64 65, 66 |
24 | Lycorine-1-O-β-D-glucoside. | C22H27NO9 | –92.4˚ (MeOH) | C. asiaticum L.C. asiaticum var. japonicum
C. augustum Rox. C. latifolium Linn. C. pratense |
RootsRoots
Roots Roots Roots |
10, 1610, 16
10 16 16 |
25 | Lycorine-1,2-O-β-D- diglucoside. | C28H36NO14 | –27.5˚ (H2O) | C. asiaticum L. | Fruits | 29 |
26 | C38H57NO10 | –34.4˚ (MeOH) | C. asiaticum L. | Leaves, Fruits, Roots | 67 | |
27 | C18H21NO4 | C. moorei Hook F.C. powellii Hort. | ---Bulbs | 1868 | ||
28 | C17H18NO4 | C. moorei Hook F. | Whole plant | 23 | ||
29 | C18H23NO5 | 218–219˚/ –32˚(MeOH)–28˚ (CHCl3) | C. powellii Hort.C. pratense | Bulbs--- | 6826 | |
30 | C. powellii Hort. | Bulbs | 69 | |||
31 | C17H15NO3 | C. latifolium Linn. | Leaves | 70 | ||
32 | (–)-Palmilycorine. | C32H47NO5 | –58.5˚ (MeOH) | C. asiaticum L. | Leaves, Fruits, Roots | 67 |
33 | C16H11NO3 | 263–265˚ | C. americanum L.C. asiaticum L.
C. asiaticum var. japonicum C. augustum Rox. C. bulbispermum Milne. C. kunthianum Roem. C. latifolium Linn. C. purpurascens |
BulbsBulbs
Bulbs Leaves, Bulbs Bulbs Leaves --- Leaves |
3816, 39
30 12, 40 12 43 44 46 |
|
34 | C16H11NO3 | 265–267˚ | C. americanum L.C. asiaticum L.
C. augustum Rox. C. bulbispermum Milne. C. kunthianum Roem. C. pratense |
BulbsBulbs
Leaves, Bulbs Bulbs Leaves --- |
3816, 39
12, 40 12 43 26 |
|
35 | C17H13NO3 | 232–233˚ | C. americanum L.C. asiaticum L.
C. latifolium Linn. |
Bulbs---
--- |
3816
44 |
|
36 | (-)-Pseudolycorine. | C17H19NO4 | 247-249˚ /- 53˚ (EtOH) | C. asiaticum L. | --- | 16 |
37 | Pseudolycorine-1-O-β-D-glucoside. | C23H29NO9 | – 108˚ (EtOH)– 105.5˚(MeOH) | C. asiaticum L.C. latifolium Linn. | ------ | 1671 |
38 | Ungeremine (lycobetaine). | C16H11NO3 | 270–272˚ | C. americanum L.C. asiaticum L.
C. augustum Rox. |
BulbsFruits
Bulbs |
3829
41, 72 |
39 | C16H19NO4 | 115–118˚ /–30.6˚ (MeOH) | C. kirkii Baker | Bulbs | 13 | |
40 | Zephyranthine-1, 2-O-diacetyl. | C20H23NO6 | C. kirkii Baker | Bulbs | 13 |
FIGURE 1: LYCORINE-TYPE ALKALOIDS ISOLATED FROM DIFFERENT CRINUM SPECIES
CONCLUSION: Crinums occupy an important position in plants of family Amaryllidaceae, and many of them have been used in traditional folk medicine throughout the world. The extensive survey of literature presents Crinum as an endless source of bioactive principles. Within the huge number and diverse classes of phytoconstituents produced by this plant, members of this genus are best known biofactories for Amaryllidaceae alkaloids. Phytochemical investigations led to isolation of several alkaloidal types and this current part of our review work summarized forty lycorine-type alkaloids isolated so far from Crinums as well as their structural differences and distribution in different Crinum species.
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How to cite this article:
Refaat J, Kamel SM, Ramadan AM and Ali AA: Crinum; an endless source of Bioactive Principles: A Review. Int J Pharm Sci Res, 2012; Vol. 3(7): 1883-1890.
Article Information
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1883-1890
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English
IJPSR
John Refaat*, Mohamed S. Kamel , Mahmoud A. Ramadan and Ahmed A. Ali
Pharmacognosy Department, Faculty of Pharmacy, Minia University , 61519 Minia, Egypt
24 February, 2012
23 April, 2012
29 June, 2012
http://dx.doi.org/10.13040/IJPSR.0975-8232.3(7).1883-90
01 July 2012