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(-)-Denudatin B Sale

(Synonyms: (-)-白玉兰亭B,Denudatin B) 目录号 : GC63940

(-)-Denudatin B 具有抗血小板作用,通过电压门控和受体调控的Ca2+通道抑制Ca2+内流,从而放松血管平滑肌。(-)-Denudatin B 通过抑制胶原蛋白和凝血酶诱导的磷酸肌苷分解,在高浓度下具有非特异性的抗血小板作用。

(-)-Denudatin B Chemical Structure

Cas No.:87402-88-8

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1 mg
¥1,620.00
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5 mg
¥4,410.00
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产品描述

(-)-Denudatin B is an antiplatelet agent. (-)-Denudatin B relaxed vascular smooth muscle by inhibiting the Ca2+ influx through voltage-gated and receptor-operated Ca2+ channels[1]. And (-)-Denudatin B has nonspecific antiplatelet action

[1]. Yu SM,et al. Vasorelaxing effect in rat thoracic aorta caused by denudatin B, isolated from the Chinese herb, magnolia fargesii. Eur J Pharmacol. 1990;187(1):39-47.
[2]. Teng CM, et al. Inhibition of thrombin- and collagen-induced phosphoinositides breakdown in rabbit platelets by a PAF antagonist--denudatin B, an isomer of kadsurenone. Thromb Res. 1990;59(1):121-130.

Chemical Properties

Cas No. 87402-88-8 SDF Download SDF
别名 (-)-白玉兰亭B,Denudatin B
分子式 C21H24O5 分子量 356.41
溶解度 储存条件 4°C, away from moisture and light
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1 mM 2.8058 mL 14.0288 mL 28.0576 mL
5 mM 0.5612 mL 2.8058 mL 5.6115 mL
10 mM 0.2806 mL 1.4029 mL 2.8058 mL
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Research Update

[Neolignans and lignan from Piper wallichii]

Zhongguo Zhong Yao Za Zhi 2010 Jan;35(2):180-2.PMID:20394289DOI:10.4268/cjcmm20100213.

To investigate the chemical constituents of the aerial part of Piper wallichii. Nine compounds were isolated by various chromatographic techniques and the structures were elucidated by their physicochemical properties and the spectral data analysis. Nine compounds were identified as one lignan (-)-galbelgin (1) and eight neolignans: denudatin B (2), hancinone D (3), (+)-licarin A (4), kadsurenone (5), wallichinine (6), hancinone C (7), hancinone B (8), (+)-burchellin (9). Compounds 1, 3, 4, 8, 9 were isolated from this plant for the first time.

[PAF antagonistic benzofuran neolignans from Piper kadsura]

Yao Xue Xue Bao 1993;28(5):370-3.PMID:8237383doi

In a continuing search for PAF antagonists, five benzofuran neolignans have been isolated from the aerial part of Piper kadsura (Choisy) Ohwi, a Chinese traditional drug used for the treatment of inflammation and rheumatic conditions. The structure determination was based upon spectroscopic analysis. Two of the neolignans were found to have new structures and were named as (-)-Denudatin B (the enantiomer of denudatin B, II) and kadsurenin M (7S,8S-3,4,3'-trimethoxy-7'-oxo-nor-8',9'-7.O. 4',8,5'-neolignan, V). The known compounds kadsurenon (I), (-)-acuminatin(III) and (+)-licarin A(IV) were also obtained from the same source. (-)-Denudatin B (II) showed potent PAF antagonistic activity in 3H-PAF receptor binding assay.

Species difference in the specific receptors of platelet activating factor

Biochem Pharmacol 1986 Dec 15;35(24):4511-8.PMID:3024653DOI:10.1016/0006-2952(86)90772-0.

Relative potencies of platelet activating factor (PAF) and PAF analogs and several PAF receptor antagonists when inhibiting the [3H]PAF specific binding to human and rabbit platelet membranes and membrane fragments of human lung tissues were compared. In rabbit platelets, L-652,731 was found to be most potent in the list of PAF receptor antagonists with an equilibrium inhibition constant (Ki) of 9.83 (+/- 2.92) X 10(-9) M followed by L-653,150 greater than kadsurenone congruent to Ono-6240 greater than ginkgolide B greater than CV-3988 greater than L-651,142, whereas in human platelets the relative potencies of these PAF receptor antagonists were as follows: Ono-6240 greater than L-653,150 congruent to L-652,731 congruent to kadsurenone greater than ginkgolide B greater than CV-3988 greater than L-651,142. Ono-6240 was the most potent one with a Ki of 4.86 (+/- 1.44) X 10(-8) M which was roughly two times more potent than that in rabbit platelets, whereas the affinity of L-652,731 was about ten times less in human platelets (Ki = 1.03 (+/- 0.15) X 10(-7) M) compared to that in rabbit platelets (Ki = 9.83 (+/- 2.92) X 10(-9) M). These variations between species among PAF antagonists strongly suggest that there exists a species difference at or near the binding site of the receptor of platelet activating factor. The relative potency of these PAF receptor antagonists in human lung membranes differed very little from that in human platelets and was found to be Ono-6240 greater than L-653,150 congruent to kadsurenone congruent to L-652,731 greater than ginkgolide B greater than CV-3988 greater than L-651,142. Even though C16-PAF showed slightly higher potency in human lung, and CV-3988 and Ono-6240 showed slightly lower, the difference was too small to suggest that there is a difference in the PAF receptors between human platelets and human lung tissues.

Stimulation of tumour necrosis factor release by cytotoxic analogues of platelet-activating factor

Immunology 1992 May;76(1):24-9.PMID:1628897doi

The capacity of cytotoxic analogues of platelet-activating factor (PAF) to stimulate tumour necrosis factor-alpha (TNF-alpha) synthesis and release by human monocytes was determined. Cell-associated TNF-alpha was quantified by protein immunoblotting and released TNF-alpha was quantified by cytotoxicity bioassay. Picomolar concentrations of methoxyPAF, SDZ 62-759, SDZ 68-826, SDZ 62-434 and SRI 62-834 induced a two- to fivefold increase in cell-associated and released TNF-alpha. These compounds were as potent as PAF for stimulating monocytes. In contrast, they lacked direct platelet-activating activity and inhibited platelet aggregation induced by PAF selectivity. The analogues inhibited PAF binding to platelets but not to monocytes. The PAF binding antagonists kadsurenone, BN52021 and WEB2086 inhibited TNF-alpha release induced by 10(-11) M PAF or methoxyPAF by a maximum of only 30-60% whereas they inhibited platelet aggregation by 10(-8) M PAF completely. Monocyte receptors for methoxyPAF were evaluated. Scatchard analysis of [3H]methoxyPAF binding to monocytes revealed large numbers of relatively low affinity receptors (Kd = 5.9 +/- 0.5 x 10(-7) M; 9.1 +/- 4.2 x 10(7) sites/monocyte). These values do not correspond to binding constants of monocyte receptors for PAF and do not account for monocyte activation by picomolar concentrations of methoxyPAF. Cytotoxic analogues of PAF stimulate TNF-alpha synthesis and release but they do not stimulate monocytes by interacting with PAF receptors.