A simple method to identify ether lipids in spermatozoa samples by MALDI-TOF mass spectrometry

A simple method to identify ether lipids in spermatozoa samples by MALDI-TOF mass spectrometry
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MALDI-TOF 质谱法鉴定精子样品中醚脂的简单方法

DOI:
10.1007/s00216-013-7147-z
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发表时间:
2013
影响因子:
4.3
通讯作者:
Müller
Müller
中科院分区:
化学2区
文献类型:
--
作者:
Nimptsch;Zschörnig;Schiller;Müller

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磷脂原(烯基酰甘油磷脂)是许多组织和细胞(如精细胞)的重要脂质成分。由于磷脂原的分子量与二酰基或烷基酰基脂的分子量重叠,因此通常使用复杂的质谱(MS;包括质谱/质谱)分析来明确鉴定磷脂原。我们将在这里展示一个简单的基质辅助激光解吸/电离飞行时间质谱仪(没有MS/MS能力),结合酸水解和随后的衍生化2,4 -二硝基苯肼(DNPH)和/或磷脂酶a2 (PLA 2)消化,足以确定精子提取物中醚类脂质的贡献。由于二酰基脂和烷基丙基脂对酸都不敏感,也不与DNPH发生反应,因此比较酸和/或DNPH处理前后的质谱可以很容易地提供关于浆磷脂含量的明确信息。此外,释放的醛很容易转化为2,4 -二硝基苯腙,并且可以很容易地在相应的负离子质谱中识别。最后,PLA 2的消化对于确认缩醛原的存在非常有用。通过对狍、牛、野猪和家猫精子提取物的分析,并与分离的磷脂进行比较,验证了该方法的有效性。
Plasmalogens (alkenylacyl glycerophospholipids) are important lipid constituents of many tissues and cells (eg, selected spermatozoa). Since the molecular weights of plasmalogens overlap with that of diacyl-or alkyl acyl lipids, sophisticated mass spectrometry (MS; including MS/MS) analysis is normally used for the unequivocal identification of plasmalogens. We will show here that a simple matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (without MS/MS capability) in combination with acidic hydrolysis and subsequent derivatization with 2, 4-dinitrophenylhydrazine (DNPH) and/or digestion with phospholipase A 2 (PLA 2) is sufficient to determine the contributions of ether lipids in spermatozoa extracts. As neither diacyl nor alkylacyl lipids are sensitive to acids and do not react with DNPH, the comparison of the mass spectra before and after treatment with acids and/or DNPH addition readily provides unequivocal information about the plasmalogen content. Additionally, the released aldehydes are readily converted into the 2, 4-dinitrophenylhydrazones and can be easily identified in the corresponding negative ion mass spectra. Finally, PLA 2 digestion is very useful in confirming the presence of plasmalogens. The suggested method was validated by analyzing roe deer, bovine, boar, and domestic cat spermatozoa extracts and comparing the results with isolated phospholipids.
通过 MALDI-TOF 质谱法可在牛和狍子精子中检测到胆碱缩醛磷脂的特征氧化产物
DOI: 10.1007/s11745-007-3108-7
发表时间: 2007
期刊: Lipids
影响因子: 1.9
作者:
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脂质的音乐:脂质成分如何协调细胞行为
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发表时间: 2012
期刊: Acta Oncologica
影响因子: 3.1
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发表时间: 2009-03-01
期刊: THERIOGENOLOGY
影响因子: 2.8
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DOI: 10.1016/j.bbalip.2011.08.018
发表时间: 2011-11
期刊: Biochimica et biophysica acta
影响因子: --
作者:
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通讯作者: Berdyshev EV
DOI: 10.1007/s00216-003-2024-9
发表时间: 2003-07-01
影响因子: 4.3
作者:
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通讯作者: Volmer, DA