1
|
Shang Z, Jiang Y, Yang F, Wu K, Zheng G, Lin Y, Wang C, Xin W, Zhao F. A homologous series of α-glucans from Hemicentrotus pulcherrimus and their immunomodulatory activity. Int J Biol Macromol 2024; 260:129657. [PMID: 38253154 DOI: 10.1016/j.ijbiomac.2024.129657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/20/2023] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
Seven macromolecular polysaccharides (HPP-2S-HPP-8S) were purified from the gonads of sea urchin Hemicentrotus pulcherrimus. They were characterized as α-glucan homologues, sharing the same α-1,4-glucan backbone substituted at C-6 positions by glucose with HPP-1S that occurs as the major polysaccharide in H. pulcherrimus, while with higher degrees of branching, and additionally possessing minor amounts of mannose and ribose. The branching degree and amounts of non-glucose branches showed a generally increasing tendency across HPP-2S - HPP-8S. These polysaccharides exhibited significant macrophage-activating effects by augmenting the secretion of NO, TNF-α and IL-6, which probably involves the activation of NF-κB and MAPKs signaling pathways. Notably, the polysaccharides with a higher degree of branching exhibited markedly enhanced immunomodulatory capacity with a lowest effective concentration of 1.95 μg/mL. This work provides new cases of bioactive α-glucans and reveals their potential application as immunomodulating agents.
Collapse
Affiliation(s)
- Zhipeng Shang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Yan Jiang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Fuhao Yang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Ke Wu
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Gaoliang Zheng
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Yexi Lin
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Chunhua Wang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China.
| | - Wenyu Xin
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China.
| | - Feng Zhao
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Shandong Collaborative Innovation Center of Ocean Engineering Technology, School of Pharmacy, Binzhou Medical University, Yantai 264003, China.
| |
Collapse
|
2
|
Zhang Z, Shang ZP, Jiang Y, Qu ZX, Yang RY, Zhang J, Lin YX, Zhao F. Selective Inhibition of PTP1B by New Anthraquinone Glycosides from Knoxia valerianoides. JOURNAL OF NATURAL PRODUCTS 2022; 85:2836-2844. [PMID: 36399709 DOI: 10.1021/acs.jnatprod.2c00879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Protein tyrosine phosphatase 1B (PTP1B) is highly validated as a therapeutic target for type 2 diabetes. However, active site-directed PTP1B inhibitors generally suffer from poor selectivity and bioavailability. Inspired by the identification of a unique anthraquinone-coumarin hybrid from Knoxia valerianoides exhibiting good specificity for PTP1B over the highly homologous T-cell protein tyrosine phosphatase (TCPTP), further chemical investigation of this plant species led to the isolation of nine new anthraquinone glycosides (1-9) and two known ones (10 and 11). Structures were characterized by a combination of spectroscopic analyses and chemical methods. All compounds showed PTP1B inhibitory activities with IC50 values ranging from 1.05 to 13.74 μM. Compounds 4 and 8 exhibited greater than 64-fold selectivity over TCPTP. Enzyme kinetic studies revealed that compounds 4 and 7 behaved as mixed-type inhibitors. Docking studies predicted similar binding modes of these compounds at the allosteric site positioned between helices α3 and α6.
Collapse
Affiliation(s)
- Zheng Zhang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Zhi-Peng Shang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Yan Jiang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Zhao-Xia Qu
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Ren-Yong Yang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Jing Zhang
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Ye-Xi Lin
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| | - Feng Zhao
- The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, School of Pharmacy, Binzhou Medical University, Yantai 264003, People's Republic of China
| |
Collapse
|
3
|
Xu L, Mu X, Liu M, Wang Z, Shen C, Mu Q, Feng B, Xu Y, Hou T, Gao L, Jiang H, Li J, Zhou Y, Wang W. Novel thieno[2,3-b]quinoline-procaine hybrid molecules: A new class of allosteric SHP-1 activators evolved from PTP1B inhibitors. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
4
|
Structure elucidation and antitumor activity of a water soluble polysaccharide from Hemicentrotus pulcherrimus. Carbohydr Polym 2022; 292:119718. [PMID: 35725190 DOI: 10.1016/j.carbpol.2022.119718] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 05/18/2022] [Accepted: 06/06/2022] [Indexed: 11/20/2022]
Abstract
Sea urchin nowadays serves as a delicacy around the world, and its gonads accumulate abundant polysaccharides before gametogenesis. However, the structure and bioactivity of these polysaccharides remain less well understood. Herein, a water soluble polysaccharide (HPP-1S) with a molecular weight of 2.996 × 107 Da was purified from the gonads of Hemicentrotus pulcherrimus. Chemical, spectroscopic and oligosaccharide sequencing analyses revealed that HPP-1S was a highly homogeneous polysaccharide featuring a linear backbone of 1,4-linked α-d-glucose with 1,6-α-d-glucose and 1,6-α-D-glucuronic acid side chains grafted on the backbone in an alternating pattern. In vitro, HPP-1S can arrest the cell cycle at G2/M and sub-G1 phases, and induce apoptosis in Hela cells potentially by increasing expression ratio of Bax/Bcl-2. In vivo, HPP-1S exhibited obvious antitumor efficacy in Hela xenograft-bearing nude mice with low toxicity. These findings indicated that HPP-1S might serve as a potential low toxic antitumor agent.
Collapse
|
5
|
Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2022. [PMID: 35929527 DOI: 10.1039/d2np90026b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as hyperispirone A from Hypericum beanii.
Collapse
Affiliation(s)
- Robert A Hill
- School of Chemistry, Glasgow University, Glasgow, UK, G12 8QQ.
| | | |
Collapse
|