Carotenoids of sea squirts—II. Comparative biochemical studies of carotenoids in sea squirts

Ookubo, Masahiro; Matsuno, Takao

doi:10.1016/0305-0491(85)90174-9

Cited by 18 publications

(13 citation statements)

References 13 publications

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“…The analogous additive cd rule mentioned above for amarouciaxanthin B (4) was also applied to determine the configuration at C-6 in amarouciaxanthin A (3). Fucoxanthin (13), in phytoplankton and sea weed on which the tunicate feeds, seems to be metabolized to fucoxanthinol (14), halocynthiaxanthin (1), mytiloxanthin (12), and eventually to mytiloxanthinone (2) (13). At the same time, fucoxanthin (13) also seems to be metabolized to amarouciaxanthin B (4) via 14 and 3 by a different pathway (Fig- ).…”

Section: Discussionmentioning

confidence: 99%

Carotenoids of Tunicates, III. The Structural Elucidation of Two New Marine Carotenoids, Amarouciaxanthin A and B

Matsuno¹,

Ookubo²,

Komori³

1985

J. Nat. Prod.

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The structure of two new marine carotenoids, isolated from the tunicate, Amaroucium pliciferum, and designated as amarouciaxanthin A and B, were determined on the basis of chemical and spectral data. Amarouciaxanthin A was determined as (6S, 3'S, 5'R,6'R)- 6,3',5'-trihydroxy-4,5,6',7'-tetradehydro-7,8,5',6'-tetrahydro-beta, beta-carotene-3,8-dione, and Amarouciaxanthin B was determined as (6S,3'R)-6,3'-dihydroxy-4,5,7',8'-tetradehydro-7,8-dihydro-beta,beta- carotene-3,8-dione. These two compounds are also presumed to be new metabolic products of a typical marine carotenoid, fucoxanthin.

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Section: Discussionmentioning

confidence: 99%

Carotenoids of Tunicates, III. The Structural Elucidation of Two New Marine Carotenoids, Amarouciaxanthin A and B

Matsuno¹,

Ookubo²,

Komori³

1985

J. Nat. Prod.

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“…Sugawara and coworkers also reported that the metabolite of fucoxanthin observed by HPLC-MS is the cis-isomer of fucoxanthinol after incubating with differentiated caco-2 human intestinal cells and plasma from mice [69]. There are also several studies reporting that the cis-isomer of fucoxanthinol and halocynthiaxanthin are the metabolites of fucoxanthin in marine animals [74,75]. However, the latter metabolite has not yet been found in human samples.…”

Section: Fucoxanthin and Fucoxanthinolmentioning

confidence: 99%

Biomarkers of seaweed intake

Dragsted

2019

Genes Nutr

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Seaweeds are marine macroalgae, some of which are edible. They are rich in specific dietary fibers and also contain other characteristic biological constituents. Biological activities have been investigated mainly in animal studies, while very few results are available from human studies. Biomarkers of food intake (BFIs) specific to seaweed could play an important role as objective measurements in observational studies and dietary intervention studies. Thus, the health effects of seaweeds can be explored and understood by discovering and applying BFIs. This review summarizes studies to identify candidate BFIs of seaweed intake. These BFIs are evaluated by a structured validation scheme. Hydroxytrifuhalol A, 7-hydroxyeckol, CO -C dimer of phloroglucinol, diphloroethol, fucophloroethol, dioxinodehydroeckol, and/or their glucuronides or sulfate esters which all belong to the phlorotannins are considered candidate biomarkers for brown seaweed. Fucoxanthinol, the main metabolite of fucoxanthin, is also regarded as a candidate biomarker for brown seaweed. Further validation will be needed due to the very limited number of human studies. Further studies are also needed to identify additional candidate biomarkers, relevant specifically for the red and green seaweeds, for which no candidate biomarkers emerged from the literature search. Reliable BFIs should also ideally be found for the whole seaweed food group.

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“…많은 연구에서 해양생물은 다양한 종류의 카로 테노이드를 함유하고 있으며, 특히 해양생물의 껍질은 카로테 노이드의 좋은 공급원이 된다고 하였다 (Ookubo and Matsuno, 1985). Choi et al (1994)에 의하면 멍게 껍질에 함유된 카로테 노이드 함량은 47.9 mg/100 g이고, 주 성분은 alloxanthin (31.3%), halocynthiaxanthin (15.5%), diatoxanthin (11.9%) 및 astaxanthin (7.8%)으로 이들에 함유된 극성분자단인 carbonyl 및 hydroxyl기와 공역이중결합의 수에 의하여 radical 소거활 성에 영향을 미친다고 하였다 (Zulueta et al, 2007).…”

Section: Ferric Thiocyanate 법을 이용한 항산화 활성unclassified

Antioxidative Properties of Mackerel Scomber japonicus Fed a Diet Fortified with Conjugated Linoleic Acid and Ascidian Halocynthia roretzi Tunic Extract

Park¹,

Park²,

Kang³

et al. 2011

Korean Journal of Fisheries and Aquatic Sciences

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This study was performed to assess the antioxidative properties of lipid from aquacultured mackerel Scomber japonicus fed with a diet fortified with conjugated linoleic acid (CLA) and ascidian Halocynthia roretzi tunic extracts by radical scavenging assay. The fish were separated into squid oil (Control) and 2.5% CLA (CA25) groups during the 8-week feeding period. The reducing power of each sample showed high levels of activity compared with α-tocopherol and butylated-hydroxyanisol (BHA) at 0.2-1.0 mg/mL of lipid. Inhibition of linoleic acid oxidation in samples from Control and CA25 groups showed similar activity after 2 days of incubation at 40 ℃ . The 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide, and hydroxyl radical scavenging activities of CLA and carotenoid-deposited sample (CA25) were higher than those of the Control group. The results indicated that the lipid extracted from the viscera of mackerel showed slightly higher antioxidant activities than that from the muscle.

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Carotenoids of sea squirts—II. Comparative biochemical studies of carotenoids in sea squirts

Cited by 18 publications

References 13 publications

Carotenoids of Tunicates, III. The Structural Elucidation of Two New Marine Carotenoids, Amarouciaxanthin A and B

Carotenoids of Tunicates, III. The Structural Elucidation of Two New Marine Carotenoids, Amarouciaxanthin A and B

Biomarkers of seaweed intake

Antioxidative Properties of Mackerel Scomber japonicus Fed a Diet Fortified with Conjugated Linoleic Acid and Ascidian Halocynthia roretzi Tunic Extract

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