- A β-secretase (BACE1) inhibitor hispidin from the mycelial cultures of Phellinus linteus
-
In the course of screening for anti-dementia agents from natural products, a β-secretase (BACE1) inhibitor was isolated from the culture broth of Phellinus linteus and identified as hispidin. It showed an IC50 value of 4.9 × 10-6 M and a Ki value of 8.4 × 10 -6 M. The compound was a non-competitive inhibitor. Hispidin also inhibited a prolyl endopeptidase (IC50 = 1.6 × 10-5 M, Ki = 2.4 × 10-5 M), but it was less inhibitory to α-secretase (TACE) and other serine proteases such as chymotrypsin, trypsin, and elastase.
- Park, In-Hye,Jeon, So-Young,Lee, Hee-Ju,Kim, Sang-In,Song, Kyung-Sik
-
-
Read Online
- The Chemical Basis of Fungal Bioluminescence
-
Many species of fungi naturally produce light, a phenomenon known as bioluminescence, however, the fungal substrates used in the chemical reactions that produce light have not been reported. We identified the fungal compound luciferin 3-hydroxyhispidin, which is biosynthesized by oxidation of the precursor hispidin, a known fungal and plant secondary metabolite. The fungal luciferin does not share structural similarity with the other eight known luciferins. Furthermore, it was shown that 3-hydroxyhispidin leads to bioluminescence in extracts from four diverse genera of luminous fungi, thus suggesting a common biochemical mechanism for fungal bioluminescence.
- Purtov, Konstantin V.,Petushkov, Valentin N.,Baranov, Mikhail S.,Mineev, Konstantin S.,Rodionova, Natalja S.,Kaskova, Zinaida M.,Tsarkova, Aleksandra S.,Petunin, Alexei I.,Bondar, Vladimir S.,Rodicheva, Emma K.,Medvedeva, Svetlana E.,Oba, Yuichi,Oba, Yumiko,Arseniev, Alexander S.,Lukyanov, Sergey,Gitelson, Josef I.,Yampolsky, Ilia V.
-
supporting information
p. 8124 - 8128
(2015/07/07)
-
- Anti-obesity effects of hispidin and alpinia zerumbet bioactives in 3t3-l1 adipocytes
-
Obesity and its related disorders have become leading metabolic diseases. In the present study, we used 3T3-L1 adipocytes to investigate the anti-obesity activity of hispidin and two related compounds that were isolated from Alpinia zerumbet (alpinia) rhizomes. The results showed that hispidin, dihydro-5,6-dehydrokawain (DDK), and 5,6-dehydrokawain (DK) have promising anti-obesity properties. In particular, all three compounds significantly increased intracellular cyclic adenosine monophosphate (cAMP) concentrations by 81.2% ± 0.06%, 67.0% ± 1.62%, and 56.9% ± 0.19%, respectively. Hispidin also stimulated glycerol release by 276.4% ± 0.8% and inhibited lipid accumulation by 47.8% ± 0.16%. Hispidin and DDK decreased intracellular triglyceride content by 79.5% ± 1.37% and 70.2% ± 1.4%, respectively, and all three compounds inhibited glycerol-3-phosphate dehydrogenase (GPDH) and pancreatic lipase, with hispidin and DDK being the most potent inhibitors. Finally, none of the three compounds reduced 3T3-L1 adipocyte viability. These results highlight the potential for developing hispidin and its derivatives as anti-obesity compounds.
- Tu, Pham Thi Be,Tawata, Shinkichi
-
p. 16656 - 16671
(2015/02/19)
-
- A convenient synthesis of hispidin from piperonal
-
An improved synthesis of hispidin (overall yield 24%) starting from the commercially available piperonal is reported. This three-step method is more effective and advantageous compared to the known six-step preparation.
- Adam,Saha-Moller,Veit,Welke
-
p. 1133 - 1134
(2007/10/02)
-