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Xue DQ, Mollo E, Cimino G, Guo YW. Lingshuine, an UnexpectedPasseriniProduct from the Hainan SpongeAxinyssa variabilis. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800458] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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52
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Yao LG, Liu HL, Guo YW, Mollo E. New Cembranoids from the Hainan Soft CoralSarcophyton glaucum. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800417] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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53
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Jia R, Guo YW, Mollo E, Gavagnin M, Cimino G. Further New Bis-cembranoids from the Hainan Soft CoralSarcophyton tortuosum. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890220] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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54
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Ciavatta ML, Lopez-Gresa MP, Gavagnin M, Nicoletti R, Manzo E, Mollo E, Guo YW, Cimino G. Cytosporin-related compounds from the marine-derived fungus Eutypella scoparia. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.03.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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55
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Mollo E, Gavagnin M, Carbone M, Castelluccio F, Pozone F, Roussis V, Templado J, Ghiselin MT, Cimino G. Factors promoting marine invasions: a chemoecological approach. Proc Natl Acad Sci U S A 2008; 105:4582-6. [PMID: 18337492 PMCID: PMC2290762 DOI: 10.1073/pnas.0709355105] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Indexed: 11/18/2022] Open
Abstract
The Mediterranean Sea is losing its biological distinctiveness, and the same phenomenon is occurring in other seas. It gives urgency to a better understanding of the factors that affect marine biological invasions. A chemoecological approach is proposed here to define biotic conditions that promote biological invasions in terms of enemy escape and resource opportunities. Research has focused on the secondary metabolite composition of three exotic sea slugs found in Greece that have most probably entered the Mediterranean basin by Lessepsian migration, an exchange that contributes significantly to Mediterranean biodiversity. We have found toxic compounds with significant activity as feeding deterrents both in the cephalaspidean Haminoea cyanomarginata and in the nudibranch Melibe viridis. These findings led us to propose aposematism in the former and dietary autonomy in producing defensive metabolites in the latter case, as predisposing factors to the migration. In the third mollusk investigated, the anaspidean Syphonota geographica, the topic of marine invasions has been approached through a study of its feeding biology. The identification of the same compounds from both the viscera of each individual, separately analyzed, and their food, the seagrass Halophila stipulacea, implies a dietary dependency. The survival of S. geographica in the Mediterranean seems to be related to the presence of H. stipulacea. The initial invasion of this exotic pest would seem to have paved the way for the subsequent invasion of a trophic specialist that takes advantage of niche opportunities.
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Carbone M, Gavagnin M, Mollo E, Bidello M, Roussis V, Cimino G. Further syphonosides from the sea hare Syphonota geographica and the sea-grass Halophila stipulacea. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.071] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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57
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Li L, Wang CY, Huang H, Mollo E, Cimino G, Guo YW. Further Highly Oxygenated Guaiane Lactones from the South China Sea GorgonianMenella sp. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890000] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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58
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Manzo E, Gavagnin M, Somerville MJ, Mao SC, Ciavatta ML, Mollo E, Schupp PJ, Garson MJ, Guo YW, Cimino G. Chemistry of Glossodoris Nudibranchs: Specific Occurrence of 12-Keto Scalaranes. J Chem Ecol 2007; 33:2325-36. [DOI: 10.1007/s10886-007-9387-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2007] [Revised: 09/03/2007] [Accepted: 10/19/2007] [Indexed: 11/24/2022]
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59
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Mao SC, Manzo E, Guo YW, Gavagnin M, Mollo E, Ciavatta ML, van Soest R, Cimino G. New diastereomeric bis-sesquiterpenes from Hainan marine sponges Axinyssa variabilis and Lipastrotethya ana. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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60
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Jia R, Guo YW, Chen P, Yang YM, Mollo E, Gavagnin M, Cimino G. Biscembranoids and their probable biogenetic precursor from the Hainan soft coral Sarcophyton tortuosum. JOURNAL OF NATURAL PRODUCTS 2007; 70:1158-66. [PMID: 17595133 DOI: 10.1021/np060220b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Five novel biscembranoids, ximaolides A-E (2-6), and their proposed biogenetic precursor, methyl tortuosoate (1), were isolated from the Hainan soft coral Sarcophyton tortuosum. The structures of compounds 1-6 were elucidated by spectroscopic methods, mainly NMR techniques. The relative stereochemistry of biscembranoids 2 and 6 was secured by X-ray diffraction analysis, whereas the relative configurations of chiral centers in compounds 1, 3, 4, and 5 have been suggested by both biogenetic considerations and NOESY experiments.
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Santalova EA, Makarieva TN, Ponomarenko LP, Denisenko VA, Krasokhin VB, Mollo E, Cimino G, Stonik VA. Sterols and related metabolites from five species of sponges. BIOCHEM SYST ECOL 2007. [DOI: 10.1016/j.bse.2006.10.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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62
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Gavagnin M, Carbone M, Amodeo P, Mollo E, Vitale RM, Roussis V, Cimino G. Structure and Absolute Stereochemistry of Syphonoside, a Unique Macrocyclic Glycoterpenoid from Marine Organisms. J Org Chem 2007; 72:5625-30. [PMID: 17580901 DOI: 10.1021/jo0704917] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The glycoterpenoid syphonoside (1) is the main secondary metabolite of both the marine mollusk Syphonota geographica and the sea-grass Halophila stipulacea, two Indo-Pacific species migrated to the Mediterranean Sea through the Suez Canal. The structure and the absolute stereochemistry of 1, which displays unique structural features, has been accomplished by using a combination of spectroscopic techniques, degradation reactions, and conformational analysis methods. Compound 1 was able to inhibit high density induced apoptosis in a number of human and murine carcinoma cell lines.
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63
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Zhang W, Gavagnin M, Guo YW, Mollo E, Ghiselin MT, Cimino G. Terpenoid metabolites of the nudibranch Hexabranchus sanguineus from the South China Sea. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.03.082] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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64
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Antonov AS, Kalinovsky AI, Stonik VA, Afiyatullov SS, Aminin DL, Dmitrenok PS, Mollo E, Cimino G. Isolation and structures of erylosides from the Caribbean sponge Erylus formosus. JOURNAL OF NATURAL PRODUCTS 2007; 70:169-78. [PMID: 17315957 DOI: 10.1021/np060364q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Nine new triterpene glycosides, erylosides F1-F4 (1-4), M (5), N (6), O (7), P (8), and Q (9), along with previously known erylosides F (10) and H (11) were isolated from the sponge Erylus formosus collected from the Mexican Gulf (Puerto Morelos, Mexico). Structures of 1-4 were determined as the corresponding biosides having aglycons related to penasterol with additional oxidation patterns in their side chains. Erylosides 5-9 contain new variants of carbohydrate chains with three (5, 6), four (7), and six (8, 9) sugar units, respectively. Erylosides 5, 7, 8, and 6, 9 contain 14-carboxy-24-methylenelanost-8(9)-en-3beta-ol and penasterol as aglycons, respectively. In contrast with its epimer 2, the compound 3 induced the early apoptosis of Ehrlich carcinoma cells at a concentration of 100 microg/mL, while 1 and 10 activated the Ca2+ influx into mouse spleenocytes (130% of the control) at the same doses.
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Raniello R, Mollo E, Lorenti M, Gavagnin M, Buia MC. Phytotoxic activity of caulerpenyne from the Mediterranean invasive variety of Caulerpa racemosa: a potential allelochemical. Biol Invasions 2006. [DOI: 10.1007/s10530-006-9044-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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66
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Ciavatta ML, Lopez Gresa MP, Gavagnin M, Manzo E, Mollo E, D'Souza L, Cimino G. New caulerpenyne-derived metabolites of an Elysia sacoglossan from the South Indian coast. Molecules 2006; 11:808-16. [PMID: 17971757 DOI: 10.3390/11100808] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2006] [Revised: 10/12/2006] [Accepted: 10/23/2006] [Indexed: 11/16/2022] Open
Abstract
Chemical analysis of the secondary metabolite pattern of the sacoglossan mollusc Elysia cf. expansa, collected along South Indian coasts, showed the presence of the typical Caulerpa-derived sesquiterpene caulerpenyne (1) and two new minor co- occurring metabolites, the compounds dihydrocaulerpenyne (4) and expansinol (5). The chemical characterization of these molecules, structurally related to 1, is reported.
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67
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Yan XH, Zhu XZ, Yu JL, Jin DZ, Guo YW, Mollo E, Cimino G. 3-Oxo-axisonitrile-3, a new sesquiterpene isocyanide from the Chinese marine sponge Acanthella sp. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2006; 8:579-84. [PMID: 16931436 DOI: 10.1080/10286020410001721096] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A new sesquiterpene isocyanide, 3-oxo-axisonitrile-3 (1), with a spiro [5,6] decane skeleton (spiroaxane) together with a known related sesquiterpene isonitrile (2), sesquiterpene isothiocyanates (3-8) and two diterpene isonitriles (9, 10) have been isolated from the Chinese marine sponge Acanthella sp. The structure of 1 has been determined on the basis of spectroscopic analysis.
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68
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Tramice A, Giordano A, Andreotti G, Mollo E, Trincone A. High-yielding enzymatic alpha-glucosylation of pyridoxine by marine alpha-glucosidase from Aplysia fasciata. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2006; 8:448-52. [PMID: 16670969 DOI: 10.1007/s10126-005-6144-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2005] [Accepted: 01/30/2006] [Indexed: 05/09/2023]
Abstract
We recently succeeded in the identification and purification of an interesting marine exo-alpha-glucosidase (EC 3.2.1.20) from the anaspidean mollusc Aplysia fasciata. The enzyme was characterized by good transglycosylation activity toward different acceptors using maltose as donor. High-yielding enzymatic alpha-glycosylation of pyridoxine using this marine enzyme is reported here; the reaction has been optimized, reaching 80% molar yield of products (pyridoxine monoglucosides 24 g/l; pyridoxine isomaltoside 35 g/l). High selectivity toward the 5' position is observed for both monoglucoside and disaccharide formation. This is the first report describing the enzymatic production of pyridoxine isomaltoside.
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69
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Ivanchina NV, Malyarenko TV, Kicha AA, Kalinovskii AI, Dmitrenok PS, Mollo E. Polar steroidal compounds from the Antarctic starfish Diplasterias brucei. Chem Nat Compd 2006. [DOI: 10.1007/s10600-006-0235-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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70
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Somerville MJ, Mollo E, Cimino G, Rungprom W, Garson MJ. Spongian diterpenes from Australian Nudibranchs: an anatomically guided chemical study of Glossodoris atromarginata. JOURNAL OF NATURAL PRODUCTS 2006; 69:1086-8. [PMID: 16872151 DOI: 10.1021/np060002i] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
An Australian population of the nudibranch mollusk Glossodoris atromarginata has been found to contain furanoditerpenes of the spongian series. Spongia-13(16),14-dien-3-one (1) and 3alpha-acetoxy-19-hydroxyspongia-13(16),14-dien-2-one [corrected] (2) were isolated for the first time from a natural source, along with a series of known diterpenes (3-7). Anatomical dissection of the animals revealed the relative distribution and chemical variation of secondary metabolites. Structural studies have provided a basis for chemical comparisons between populations from different geographic locations.
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71
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Yu ZG, Bi KS, Guo YW, Mollo E, Cimino G. A new spiro-sesquiterpene from the sponge Dysidea fragilis. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2006; 8:467-70. [PMID: 16864464 DOI: 10.1080/10286020500172392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A new spiro-sesquiterpene, spirofragilin (1), along with a known related sesquiterpene, dehydroherbadysidolide (2), have been isolated from the marine sponge Dysidea fragilis collected in the South China Sea. The structure of 1 was elucidated on the basis of detailed spectroscopic analysis.
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72
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Jia R, Guo YW, Mollo E, Gavagnin M, Cimino G. Two New Polyhydroxylated Steroids from the Hainan Soft CoralSinularia sp. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690132] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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73
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Jia R, Guo YW, Mollo E, Gavagnin M, Cimino G. Sarcophytonolides E-H, cembranolides from the Hainan soft coral Sarcophyton latum. JOURNAL OF NATURAL PRODUCTS 2006; 69:819-22. [PMID: 16724849 DOI: 10.1021/np050477u] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Four new cembrane diterpenes, sarcophytonolides E-H (1-4), were isolated from the Hainan soft coral Sarcophyton latum. Their structures were elucidated by detailed spectroscopic (IR, MS, 2D NMR) analysis and by comparison with related known compounds. The absolute stereochemistry of sarcophytonolide H (4) was determined by applying the modified Mosher's method.
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Zhang W, Huang H, Ding Y, Gavagnin M, Mollo E, Cimino G, Guo YW. Three New Polyoxygenated Steroids from Two Species of the South China Sea GorgonianMuricella flexuosa andMenella verrucosaBrundin. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690073] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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75
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Andreotti G, Giordano A, Tramice A, Mollo E, Trincone A. Hydrolyses and transglycosylations performed by purified α-d-glucosidase of the marine mollusc Aplysia fasciata. J Biotechnol 2006; 122:274-84. [PMID: 16290308 DOI: 10.1016/j.jbiotec.2005.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2005] [Revised: 09/20/2005] [Accepted: 10/06/2005] [Indexed: 10/25/2022]
Abstract
The purification and characterisation of the alpha-glucosidase from the marine mollusc Aplysia fasciata are reported. Overall substrate specificity of the pure enzyme for both hydrolytic and transglycosylation reactions was studied. Remarkable characteristics of this enzyme are indicated by the results of the interesting survey of transglycosylation reactions reported: pyridoxine glucosylation, synthesis of chromophoric (pNP) di- and trisaccharides, glucosylation of cellobiose and sucrose. For these last two acceptors both the yields of reactions and the concentrations of products are comparable to those obtained using glycosyl transferases; in addition, synthesis of pyridoxine and chromophoric glycosides were still possible using a 1:1 ratio maltose:acceptor which is a very interesting characteristic from a synthetic point of view (effortless purification, productivity of each reaction batch, etc.).
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76
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Wahidullah S, Guo YW, Fakhr IMI, Mollo E. Chemical diversity in opisthobranch molluscs from scarcely investigated Indo-Pacific areas. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2006; 43:175-98. [PMID: 17153343 DOI: 10.1007/978-3-540-30880-5_8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Opisthobranch molluscs with both a rich variety of secondary metabolites and great biomedical potential represent the most intensively studied group of molluscs in natural product chemistry. We review here the chemical investigations into secondary metabolites of "sea slugs" from less-studied Indian, Chinese and Egyptian coasts, giving an overview of their most relevant biological activities. In addition to the biomedical interest of the metabolites, in which both structures and organisms often lose their own importance, this chapter emphasizes the phyletic and geographic distribution of the compounds in order to provide a further informational base for chemotaxonomical generalizations.
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Jia R, Guo YW, Mollo E, Cimino G. Two new 19-oxygenated polyhydroxy steroids from the hainan soft coralSinulariasp. Nat Prod Res 2005; 19:789-94. [PMID: 16317833 DOI: 10.1080/14786410500123833] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Two new 19-oxygenated polyhydroxy steroids, 24-methylcholesta-5, 24(28)-diene-3 beta, 7 beta, 19-triol-19-monoacetate (1), 24-methylcholesta-5, 24(28)-diene-3 beta, 7 beta, 19-triol-7 beta, 19-diacetate (3), together with a known steroid, 24-methylcholesta-5, 24(28)-diene-3 beta, 7 beta, 19-triol-7 beta-monoacetate (4), have been isolated from the soft coral Sinularia sp. collected from the South China Sea and characterized through interpretation of spectral data.
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78
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Gaspar H, Gavagnin M, Calado G, Castelluccio F, Mollo E, Cimino G. Pelseneeriol-1 and -2: new furanosesquiterpene alcohols from porostome nudibranch Doriopsilla pelseneeri. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.096] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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79
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Andreotti G, Giordano A, Tramice A, Mollo E, Trincone A. Purification and characterization of a β-d-mannosidase from the marine anaspidean Aplysia fasciata. J Biotechnol 2005; 119:26-35. [PMID: 16029907 DOI: 10.1016/j.jbiotec.2005.06.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Revised: 06/02/2005] [Accepted: 06/10/2005] [Indexed: 11/29/2022]
Abstract
A beta-D-mannosidase was purified to homogeneity from visceral mass extract of Aplysia fasciata a mollusc belonging to the order Anaspidea. The purified enzyme is a homodimer with a subunit mass of 130 kDa. Temperature and pH optima of this enzyme were 45 degrees C and 4.5, respectively. Substrate specificity tests revealed that the enzyme exerts only beta-D-mannosidase activity. The K(M) and V(max) values for p-nitrophenyl beta-D-mannopyranoside were determined to be 2.4 mM and 50.3 micromol min(-1)mg(-1), respectively. The catalytic efficiency of this beta-mannosidase (11,519 min(-1)) was significantly higher than those reported for beta-mannosidases from other sources. It was verified that this is an exo-acting glycosyl hydrolase with transglycosidase activity. When the enzyme was incubated in the presence of p-nitrophenyl beta-D-mannopyranoside, self-transfer of the mannosyl group was observed, and a 10-15% yield of a beta-1-4 disaccharide was obtained. When the reaction was performed in the presence of o-nitrophenyl alpha-D-2-deoxy-N-acetyl glucopyranoside in 3:1 molar ratio with respect to the p-nitrophenyl beta-D-mannopyranoside, two regioisomers (85:15, 12% yield) due to the beta-mannosylation of the heteroacceptor in 4 and in 6 positions were formed.
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Jia R, Guo YW, Mollo E, Cimino G. Sarcophytonolides A-D, Four New Cembranolides from the Hainan Soft CoralSarcophyton sp. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590073] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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81
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Silchenko AS, Stonik VA, Avilov SA, Kalinin VI, Kalinovsky AI, Zaharenko AM, Smirnov AV, Mollo E, Cimino G. Holothurins B(2), B(3), and B(4), new triterpene glycosides from mediterranean sea cucumbers of the genus holothuria. JOURNAL OF NATURAL PRODUCTS 2005; 68:564-567. [PMID: 15844949 DOI: 10.1021/np049631n] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Triterpene glycosides of three species of the Mediterranean sea cucumbers Holothuria polii, Holothuria tubulosa, and Holothuria sp. were studied. Three new monosulfated biosides, holothurins B(2) (1), B(3) (2), and B(4) (3), along with the previously known holothurins A (4) and B (5) were isolated from the sea cucumber H. polii. Triterpene glycosides belonging to holothurin A and B groups were found in H. tubulosa, while only one individual glycoside, holothurin A (4), was isolated from Holothuria sp. Structures of new substances were elucidated on the basis of spectral data (2D NMR and MS). The significance of holothurins as chemotaxonomic markers of the animals belonging to the genus Holothuria and taxonomic status of some representatives of the holothurians studied are discussed.
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82
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Mollo E, Gavagnin M, Carbone M, Guo YW, Cimino G. Chemical studies on Indopacific Ceratosoma nudibranchs illuminate the protective role of their dorsal horn. CHEMOECOLOGY 2005. [DOI: 10.1007/s00049-005-0289-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Huang XC, Guo YW, Mollo E, Cimino G. Dysideasterols A-E, Five New Uncommon Polyhydroxylated Steroids from the South China Sea SpongeDysidea sp. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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84
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Gavagnin M, Carbone M, Nappo M, Mollo E, Roussis V, Cimino G. First chemical study of anaspidean Syphonota geographica: structure of degraded sterols aplykurodinone-1 and -2. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.10.093] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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85
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Manzo E, Ciavatta ML, Gavagnin M, Mollo E, Wahidulla S, Cimino G. New γ-pyrone propionates from the Indian Ocean sacoglossan Placobranchus ocellatus. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.11.085] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Giordano A, Tramice A, Andreotti G, Mollo E, Trincone A. Enzymatic syntheses and selective hydrolysis of O-β-d-galactopyranosides using a marine mollusc β-galactosidase. Bioorg Med Chem Lett 2005; 15:139-43. [PMID: 15582427 DOI: 10.1016/j.bmcl.2004.10.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Revised: 10/07/2004] [Accepted: 10/07/2004] [Indexed: 11/19/2022]
Abstract
The use of crude extract of the hepatopancreas of Aplysia fasciata, a large mollusc belonging to the order Anaspidea containing a beta-galactosidase activity, was reported for the synthesis of different galactosides. Good yields with polar acceptors and the uncommon beta-1-3 selectivity in the transgalactosylation reactions with most of the acceptors were observed. A beta-1-2 selectivity in the hydrolytic conditions was also observed and discussed.
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Ottaiano A, Mollo E, Di Lorenzo G, Pisano C, Di Maio M, Barletta E, Pensabene M, Segati R, Bullian P, Nasti G, Bryce J, Scala S, Castello G, Ascierto PA. Prospective clinical trials of biotherapies in solid tumors: a 5-year survey. Cancer Immunol Immunother 2005; 54:44-50. [PMID: 15693138 PMCID: PMC11034267 DOI: 10.1007/s00262-004-0567-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Accepted: 04/30/2004] [Indexed: 11/28/2022]
Abstract
PURPOSE To review the content and quality of prospective clinical trials of biotherapies in solid tumors. METHODS Data were collected from the literature between 1990 and 2002 on general study characteristics, patient and disease factors, study methodology, and factors related to completeness of reporting. Quality of phase II studies was evaluated by an ad hoc questionnaire. Descriptive statistics, contingency tables, and the chi-square test were applied. RESULTS A total of 334 studies were selected, of which about three quarters were multicenter, with 42.5% reporting phase I, 42.2% phase II or I/II, and 11.9% phase III or II/III studies. Only 13.7% were randomized, and a study design emphasizing statistical analysis was lacking in as many as one third. The assessment of biological endpoints was stated as the primary or secondary goal in half of these studies. Melanoma (17.1%), renal carcinoma (11.1%), gastrointestinal neoplasms (11.1%), and lymphomas (6.3%) were the most studied diseases. Immunotherapies accounted for 182 studies; the remaining 152 reported other biotherapies. Patients with (1) advanced disease (P = 0.003), (2) heavily pretreated neoplasms (P < 0.0001), (3) poor performance status (PS < 2) (P < 0.0001), were more frequently enrolled in studies of biotherapy. Biotherapies were less frequently evaluated in phase III studies (7/152) compared with immunotherapies (33/182) (P < 0.0001). A statistical study design was more frequently identified in biotherapy trials (127/152) compared with immunotherapy trials (98/182) (P < 0.0001). Biological endpoints were less frequently evaluated in phase III studies in both biotherapies (100% no vs 0% yes) and immunotherapies (81.8% no vs 18.2% yes) (P = 0.01, for biotherapies; P < 0.0001, for immunotherapies). Phase I immunotherapy studies more frequently applied biological or molecular criteria for patient selection (41.1%) than phase II (29.3%) and III (3.1%) studies (P < 0.0001). CONCLUSIONS The very wide diversity in modalities of conducting and reporting clinical trials of biotherapies of solid tumors and the presence of some methodological pitfalls suggest that the methodological standards for conducting and publishing clinical trials in biotherapies should be improved to enhance the reliability of the body of published data.
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Gavagnin M, Mollo E, Docimo T, Guo YW, Cimino G. Scalarane metabolites of the nudibranch Glossodoris rufomarginata and Its dietary sponge from the South China Sea. JOURNAL OF NATURAL PRODUCTS 2004; 67:2104-2107. [PMID: 15620263 DOI: 10.1021/np040087s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Chemical investigation of the nudibranch Glossodoris rufomarginata and its sponge prey provided additional evidence of the trophic relationship between Glossodoris nudibranchs and scalarane-containing sponges. Scalaradial (1) and its deacetyl derivative 2 were found to be the main components of the extract of the sponge, whereas a series of related scalaranes (3-7), probably derived from dietary scalaradial, were isolated from the mollusk. Two new scalarane sesterterpenes (5 and 6), exhibiting a keto functionalization at C-12, were characterized by spectroscopic methods and chemical correlations.
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Zhang W, Guo YW, Mollo E, Fontana A, Cimino G. Acanthovagasteroids A-D, four new 19-hydroxylated steroids from the South China Sea gorgonian Acanthogorgia vagae Aurivillius. JOURNAL OF NATURAL PRODUCTS 2004; 67:2083-2085. [PMID: 15620257 DOI: 10.1021/np049859a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Four new steroids, acanthovagasteroids A-D (1-4), along with two known analogues (5, 6), were isolated from the gorgonian Acanthogorgia vagae Aurivillius from the South China Sea. The structures of the new compounds, characterized with 19-hydroxy groups, were identified on the basis of extensive spectral analysis as well as by comparison with literature data. This is the first report of 19-hydroxy steroids from a gorgonian and suggests a possible biosynthetic relationship between 19-nor and 19-hydroxy steroids.
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Zhang W, Guo YW, Mollo E, Cimino G. Menverins A-D, New Highly Oxygenated Guaiane Lactones from Hainan GorgonianMenella verrucosa (Brundin). Helv Chim Acta 2004. [DOI: 10.1002/hlca.200490263] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Manzo E, Ciavatta ML, Gavagnin M, Mollo E, Guo YW, Cimino G. Isocyanide terpene metabolites of Phyllidiella pustulosa, a nudibranch from the South China Sea. JOURNAL OF NATURAL PRODUCTS 2004; 67:1701-1704. [PMID: 15497943 DOI: 10.1021/np0400961] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A series of isocyanides, compounds 4-11, including diterpenes never before found in Phyllidiid nudibranchs, have been isolated from a Chinese population of the nudibranch Phyllidiella pustulosa. Three new sesquiterpenes (8, 10, and 11), with eudesmane, guaiane, and bisabolane skeletons, respectively, have been characterized by spectral methods and chemical comparison with known related molecules. The absolute stereochemistry of the major metabolite, the isocyanide 8, an enantiomer of the known sponge metabolite stylotelline (12), has also been determined.
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Zhang W, Guo YW, Mollo E, Cimino G. Junceellonoids A and B, Two New Briarane Diterpenoids from the Chinese GorgonianJunceella fragilisRidley. Helv Chim Acta 2004. [DOI: 10.1002/hlca.200490209] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gavagnin M, Mollo E, Castelluccio F, Crispino A, Cimino G. Sesquiterpene metabolites of the antarctic gorgonian Dasystenella acanthina. JOURNAL OF NATURAL PRODUCTS 2003; 66:1517-1519. [PMID: 14640533 DOI: 10.1021/np030201r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The ethereal extract of the Antarctic gorgonian Dasystenella acanthina was found to contain three main nonpolar and relatively transient sesquiterpene metabolites (1-3), which were isolated and submitted to spectral analysis. Two of them were identified as the previously reported compounds trans-beta-farnesene (1) and isofuranodiene (3), whereas the third metabolite, the furanoeudesmane 2, was unknown. The structure elucidation of this new sesquiterpene was solved mainly on the basis of its spectral properties and correlation with known compounds.
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Gavagnin M, Carbone M, Mollo E, Cimino G. Further chemical studies on the Antarctic nudibranch Austrodoris kerguelenensis: new terpenoid acylglycerols and revision of the previous stereochemistry. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00775-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gavagnin M, Carbone M, Mollo E, Cimino G. Austrodoral and austrodoric acid: nor-sesquiterpenes with a new carbon skeleton from the Antarctic nudibranch Austrodoris kerguelenensis. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02849-6] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gavagnin M, Ungur N, Mollo E, Templado J, Cimino G. Structure and Synthesis of a Progesterone Homologue from the Skin of the Dorid NudibranchAldisa smaragdina. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200205)2002:9<1500::aid-ejoc1500>3.0.co;2-d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gavagnin M, Mollo E, Castelluccio F, Ghiselin MT, Calado G, Cimino G. Can molluscs biosynthesize typical sponge metabolites? The case of the nudibranch Doriopsilla areolata. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00876-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fontana A, d'Ippolito G, D'Souza L, Mollo E, Parameswaram PS, Cimino G. New acetogenin peroxides from the Indian sponge Acarnus bicladotylota. JOURNAL OF NATURAL PRODUCTS 2001; 64:131-133. [PMID: 11170688 DOI: 10.1021/np0002435] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two new cyclic peroxides (1 and 2) and the known metabolite 3 have been found in the organic extract of the Indian sponge Acarnus bicladotylota. The structure of the new products has been assured by chemical and spectroscopic methods. The absolute stereochemistry of 1-3 has been determined by Mosher's method on the semisynthetic derivative 4.
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Fontana A, Mollo E, Ortea J, Gavagnin M, Cimino G. Scalarane and homoscalarane compounds from the nudibranchs Glossodoris sedna and Glossodoris dalli: chemical and biological properties. JOURNAL OF NATURAL PRODUCTS 2000; 63:527-530. [PMID: 10785432 DOI: 10.1021/np990506z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A series of homoscalarane and scalarane compounds (2-7) have been isolated from two distinct species of Pacific Glossodoris nudibranchs. The structure and elucidation of the relative stereochemistry of the new metabolites 2 and 3 were obtained by spectroscopic methods. Compound 2 was ichthyotoxic at 0.1 ppm against Gambusia affinis and showed moderate activity (IC(50) 18 microM) to inhibit mammalian phospholipase A(2).
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