Antitumour bioactive peptides isolated from marine organisms

Marine organisms are an important source of antitumour active substances. Thus, pharmaceutical research in recent years has focused on exploring new antitumour drugs derived from marine organisms, and, many peptide drugs with strong antitumour activities have been successfully extracted. Based on different mechanisms, this paper reviews the research on several typical antitumour bioactive peptides in marine drugs and the latest progress therein. Additionally, the development prospects for these antitumour bioactive peptide‐based drugs are discussed so as to provide a reference for future research in this field.     

海洋生物活性肽研究进展

综述几种海洋天然生物活性肽的研究进展，阐明酶解生物活性肽的理论基础和海洋生物活性肽的吸收理论。对活性肽在养殖业中的作用、当前海洋生物活性肽研究的不足及研究前景作了评述。     

海洋动物功能蛋白及活性肽研究进展

海洋动物中含有丰富的蛋白质、多糖、多肽、脂肪酸等活性物质,具有来源丰富、功能多样、活性显著、毒副作用小等优点,已经成为当前医药卫生和功能食品研究的热点。本文主要对海洋动物来源的抗氧化、抗菌、抗肿瘤和免疫调节等活性的功能蛋白和多肽进行综述,介绍其可能的作用机制,并就海洋生物功能蛋白及活性肽开发利用前景作出展望。     

海鞘微生物来源活性次级代谢产物研究进展

海鞘作为海洋药物的重要源泉,从中分离的8%的活性化合物被认为源自其共附生微生物。近年来,海鞘微生物来源次级代谢产物因其新颖的化学结构和显著活性而逐渐受到关注,在海洋药物研发中具有广阔的前景。本文综述了1994~2022年初报道的150个新的海鞘微生物天然产物的来源、化学结构及其生物活性,结构类型主要包括聚酮类、生物碱类、萜类和肽类等,并展望了海鞘微生物天然产物的发展方向。     

海洋生物活性肽及其生物活性研究进展

概述存在于海绵、海鞘等海洋低等生物和海洋鱼贝类中的生物活性肽，以及这些活性肽的抗肿瘤、抗菌、抗高血压及抗氧化等生物活性的研究进展。     

Emerging biopharmaceuticals from marine actinobacteria

Actinobacteria are quotidian microorganisms in the marine world, playing a crucial ecological role in the recycling of refractory biomaterials and producing novel secondary metabolites with pharmaceutical applications. Actinobacteria have been isolated from the huge area of marine organisms including sponges, tunicates, corals, mollusks, crabs, mangroves and seaweeds. Natural products investigation of the marine actinobacteria revealed that they can synthesize numerous natural products including alkaloids, polyketides, peptides, isoprenoids, phenazines, sterols, and others. These natural products have a potential to provide future drugs against crucial diseases like cancer, HIV, microbial and protozoal infections and severe inflammations. Therefore, marine actinobacteria portray as a pivotal resource for marine drugs. It is an upcoming field of research to probe a novel and pharmaceutically important secondary metabolites from marine actinobacteria. In this review, we attempt to summarize the present knowledge on the diversity, chemistry and mechanism of action of marine actinobacteria-derived secondary metabolites from 2007 to 2016.     

海绵中活性化学成分的研究进展

海洋生物海绵的活性化学成分研究一直都是海洋药物研究的焦点。目前,从海绵中发现了大量的具有抗微生物、抗炎、抗肿瘤、抗病毒和免疫调节等活性的化学成分,其按照化学结构类型可分为脂类、大环内酯类、肽类、生物碱类、甾醇类和萜类等,并且有很多化合物已经进入临床研究。对近年来从海绵中发现的活性化学成分进行综述。     

海洋药物研究进展与发展趋势

迄今,人们已从各类海洋生物中分离获得14 500余种具有各种结构类型的海洋天然产物,其中20种已进入临床研究.运用新的研究方法和技术,开拓新的资源领域,将是解决药源问题的可行途径.笔者概述海洋药物的研究进展,展望海洋药物研究发展趋势.     

源于海洋真菌抗肿瘤活性物质的研究进展

海洋微生物以其生存于特殊的生物环境中而具有产生新型生物活性物质的巨大潜力。30多年来,从海洋真菌中分离鉴定近300个结构新颖的次级代谢产物,许多化合物显示了良好的抗肿瘤、抗菌和抗病毒活性。本文对近10年来海洋真菌所产生的抗肿瘤活性物质的研究进展进行综述,并对其发展进行展望。     

海洋抗肿瘤活性蛋白与多肽的研究进展

海洋是人类赖以生存的资源宝库，海洋生物的多样性和特殊性，为人类提供了许多结构新颖、功能独特的生理活性物质。本文就具有抗肿瘤作用的海洋生物活性蛋白与多肽的研究现状作一概述。     

海洋天然产物研究与新药开发

近年来海洋天然产物越来越引起科学家们的关注。在浩瀚的海洋中存在着大量超乎人们想象的化学结构新颖、生物活性多样、作用机制独特的次生代谢产物。海洋天然产物已成为发现重要先导药物的主要源泉。本文主要探讨近年来发现的重要的海洋天然活性产物以及在新药开发中所起的作用。     

Recent updates of marine antimicrobial peptides

Antimicrobial peptides are group of proteins showing broad-spectrum antimicrobial activity that have been known to be powerful agents against a variety of pathogens. This class of compounds contributed to solving the microbial resistance dilemma that limited the use of many potent antimicrobial agents. The marine environment is known to be one of the richest sources for antimicrobial peptides, yet this environment is not fully explored. Hence, the scientific research attention should be directed toward the marine ecosystem as enormous amount of useful discoveries could be brought to the forefront. In the current article, the marine antimicrobial peptides reported from mid 2012 to 2017 have been reviewed.     

海洋真菌来源的抗植物病原菌活性天然产物

近年来,海洋真菌来源的天然产物因其化学结构新颖和活性显著而受到广泛关注,其中许多代谢产物对植物病原菌具有较强的抗菌性。本文综述了从2002年-2018年5月间报道的33个新的抗植物病原菌活性天然产物的来源、结构及其生物活性。     

Enhanced antitumor activity and selectivity of lactoferrin‐derived peptides

Abstract: A number of peptide analogs derived from the N‐terminal α‐helical region of bovine lactoferrin (LFB 14–31), were designed in order to investigate how deviating numbers and positions of positively charged residues and numbers of aromatic residues affected their activity against prokaryotic, normal and transformed eukaryotic cells. Most of the LFB derivatives were highly active against both Escherichia coli and Staphylococcus aureus. The peptides were more active against the tumor cell lines MethA, HT‐29 and MT‐1 than normal eukaryotic cells. The peptides that were most active against the tumor cell lines had all cationic residues concentrated in one sector of the helical structure. These peptides were less selective against the tumor cell lines than against normal fibroblasts. Quantitative structure?activity relationship studies showed that certain structural parameters affected toxicity against the tumor cell lines more than against fibroblasts. Peptides encompassing these parameters were slightly less active against tumor cells, but gained significant selectivity.     

海洋放线菌M326活性代谢产物的初步研究

目的对海洋放线菌M326活性代谢产物进行初步研究。方法以抑菌活性为指标,采用不同的培养基与培养时间研究代谢产物活性与培养条件的关系,用不同温度、pH处理了解活性产物的稳定性,用有机溶剂,大孔树脂对活性物质进行提取分离。结果人工海水、蒸馏水配制的GBP培养基产物活性较强。抗菌物质在pH 2~11时较稳定,强酸性条件下热稳定性好,难以用一般有机溶剂萃取,碱性条件下可被AB-8大孔树脂吸附。结论代谢产物对G 菌有较强的抑菌活性,对G-菌、耐药菌均有不同程度的抑菌活性,且抗菌物质的极性较强。     

Anticancer agent-based marine natural products and related compounds

Marine natural products constitute a huge reservoir of anticancer agents. Consequently during the past decades, several marine anticancer compounds have been isolated, identified, and approved for anticancer treatment or are under trials. In this article the sources, structure, bioactivities, mode of actions, and analogs of some promising marine and derived anticancer compounds have been discussed.     

几类重要的海洋抗肿瘤药物研究进展

目前对海洋抗肿瘤药物的研究已经成为全世界普遍关注的热点。近年来，苔藓抑素、ecteinascidin-743、海兔毒肽、膜海鞘素、psammaplin、软海绵素B等六类化合物的研究取得了较大进展。本文综述这几类海洋抗肿瘤药物及其衍生物的研究进展，并探讨海洋抗肿瘤药物发展的趋势。     

非曲霉(青霉)属海洋真菌新天然产物(1951-2014)

海洋真菌来源的天然产物因其化学结构新颖和生物活性多样成为极具潜力的药物开发资源,受到研究者的广泛关注。本文综述了从20世纪50年代头孢菌素类抗生素发现开始至2014年8月间已经报道的1123个非曲霉(青霉)属海洋真菌新天然产物的来源、结构及其生物活性。     

浙江舟山群岛12种海洋动物中生物活性物质的初步筛选

利用抗菌模型和肿瘤细胞毒模型,对浙江舟山群岛12种海洋动物中的生物活性物质进行了筛选。 结果表明,7种动物的乙醇提取物有明显的抗金黄色葡萄球菌作用,其中,泥螺乙醇提取物的活性最强;大竹 蛏和泥螺的乙醇提取物以及纵条肌海葵的水提物对SMMU-7721细胞有明显的细胞毒活性,IC50分别为89, 71,63.2μg·mL-1。     

Structure-antitumor and hemolytic activity relationships of synthetic peptides derived from cecropin A-magainin 2 and cecropin A-melittin hybrid peptides

The hybrid peptide (CA-ME) derived from cecropin A(1–8) and melittin(1–12) has potent antibacterial and antimalarial activities. Because the N-terminal sequence 1–12 of magainin 2 is similar to melittin(1–12), CA-MA with CA(1–8) and MA(1–12) and their analogues were designed and synthesized. Antitumor activities of these peptides were evaluated using three small cell lung cancer cell lines. Greater antitumor activity was observed when the residues 16, 18 and 19 of the peptide were hydrophobic (Leu or Val), basic (Lys) and basic (Lys), respectively. The IC₅₀ values of the peptides with the residues were 2 to 4 μm . Residue 12 was related to hemolytic activity rather than antitumor activity. Increase in amphipathicity of P4 enhanced hemolytic activity without significant change in antitumor activity. The α-helicity of the peptides in a 30 mm sodium dodecyl sulfate solution was more closely correlated to hemolytic activity than antitumor activity.