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Li G, Li S, Li X, He W, Tan X, Liang J, Zhou Z. A novel electrochemical aptasensor based on NrGO-H-Mn 3O 4 NPs integrated CRISPR/Cas12a system for ultrasensitive low-density lipoprotein determination. Mikrochim Acta 2024; 191:547. [PMID: 39162876 DOI: 10.1007/s00604-024-06628-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 08/01/2024] [Indexed: 08/21/2024]
Abstract
Atherosclerosis cardiovascular disease (ASCVD) has become one of the leading death causes in humans. Low-density lipoprotein (LDL) is an important biomarker for assessing ASCVD risk level. Thus, monitoring LDL levels can be an important means for early diagnosis of ASCVD. Herein, a novel electrochemical aptasensor for determination LDL was designed based on nitrogen-doped reduced graphene oxide-hemin-manganese oxide nanoparticles (NrGO-H-Mn3O4 NPs) integrated with clustered regularly interspaced short palindromic repeats and associated proteins (CRISPR/Cas12a) system. NrGO-H-Mn3O4 NPs not only have a large surface area and remarkable enhanced electrical conductivity but also the interconversion of different valence states of iron in hemin can provide an electrical signal. Nonspecific single-stranded DNA (ssDNA) was bound to NrGO-H-Mn3O4 NPs to form a signaling probe and was immobilized on the electrode surface. The CRISPR/Cas12a system has excellent trans-cleavage activity, which can be used to cleave ssDNA, thus detaching the NrGO-H-Mn3O4 NPs from the sensing interface and attenuating the electrical signal. Significant signal change triggered by the target was ultimately obtained, thus achieving sensitive detection of the LDL in range from 0.005 to 1000.0 nM with the detection limit of 0.005 nM. The proposed sensor exhibited good stability, selectivity, and stability and achieved reliable detection of LDL in serum samples, demonstrating its promising application prospects for the diagnostic application of LDL.
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Affiliation(s)
- Guiyin Li
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming, Guangdong, 525000, People's Republic of China.
- School of Life and Environmental Sciences, School of Intellectual Property, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, People's Republic of China.
| | - Shengnan Li
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming, Guangdong, 525000, People's Republic of China
- School of Life and Environmental Sciences, School of Intellectual Property, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, People's Republic of China
| | - Xinhao Li
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming, Guangdong, 525000, People's Republic of China
- School of Life and Environmental Sciences, School of Intellectual Property, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, People's Republic of China
| | - Wei He
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming, Guangdong, 525000, People's Republic of China
| | - Xiaohong Tan
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming, Guangdong, 525000, People's Republic of China
| | - Jintao Liang
- School of Life and Environmental Sciences, School of Intellectual Property, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, People's Republic of China.
| | - Zhide Zhou
- School of Life and Environmental Sciences, School of Intellectual Property, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, People's Republic of China.
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Saito Y, Noguchi N, Niki E. Cholesterol is more readily oxidized than phospholipid linoleates in cell membranes to produce cholesterol hydroperoxides. Free Radic Biol Med 2024; 211:89-95. [PMID: 38101585 DOI: 10.1016/j.freeradbiomed.2023.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 12/17/2023]
Abstract
Cholesterol is an essential component of cell membranes and serves as an important precursor of steroidal hormones and bile acids, but elevated levels of cholesterol and its oxidation products have been accepted as a risk factor for maintenance of health. The free and ester forms of cholesterol and fatty acids are the two major biological lipids. The aim of this hypothesis paper is to address the long-standing dogma that cholesterol is less susceptible to free radical peroxidation than polyunsaturated fatty acids (PUFAs). It has been observed that cholesterol is peroxidized much slower than PUFAs in plasma but that, contrary to expectations from chemical reactivity toward peroxyl radicals, cholesterol appears to be more readily autoxidized than linoleates in cell membranes. The levels of oxidation products of cholesterol and linoleates observed in humans support this notion. It is speculated that this discrepancy is ascribed to the fact that cholesterol and phospholipids bearing PUFAs are localized apart in raft and non-raft domains of cell membranes respectively and that the antioxidant vitamin E distributed predominantly in the non-raft domains cannot suppress the oxidation of cholesterol lying in raft domains which are relatively deficient in antioxidant.
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Affiliation(s)
- Yoshiro Saito
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan; The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan.
| | - Noriko Noguchi
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Etsuo Niki
- Research Center for Advanced Science and Technology, The University of Tokyo, Komaba, Tokyo, Japan.
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Stote KS, Burns G, Mears K, Sweeney M, Blanton C. The Effect of Berry Consumption on Oxidative Stress Biomarkers: A Systematic Review of Randomized Controlled Trials in Humans. Antioxidants (Basel) 2023; 12:1443. [PMID: 37507981 PMCID: PMC10376627 DOI: 10.3390/antiox12071443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Bioactive compounds in berries may scavenge reactive oxygen and nitrogen species by donating electrons to free radicals, thereby protecting DNA, proteins, and lipids from oxidative damage. Evidence shows that berry consumption has beneficial health effects, though it remains unclear whether berries exert a significant impact on oxidative stress in humans. Thus, we performed a systematic review of randomized controlled trials (RCT) to examine the effects of non-acute (more than a single dose and ≥7 days) berry consumption on biomarkers of oxidative stress. Searches were conducted in PubMed, Cochrane Library, and Scopus; results were imported into Covidence for screening and data extraction. The literature search identified 622 studies that were screened, and 131 full-text studies assessed for eligibility. Ultimately, 28 RCTs met the eligibility criteria. Common biomarkers of oxidative stress (antioxidants, DNA damage, isoprostanes, malondialdehyde, and oxidized LDL) were systematically reviewed, and results were reported narratively. Of the approximate 56 oxidative stress biomarkers evaluated in the 28 RCTs, 32% of the biomarkers were reported to have statistically significant beneficial results and 68% of the biomarkers were reported as having no statistically significant differences. More well-designed and longer-term berry RCTs are needed to evaluate biomarkers of oxidative stress.
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Affiliation(s)
- Kim S Stote
- Department of Allied Health Sciences, State University of New York, Empire State University, Saratoga Springs, NY 12866, USA
| | - Gracie Burns
- Department of Biology, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
| | - Kim Mears
- Robertson Library, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
| | - Marva Sweeney
- Department of Biology, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
| | - Cynthia Blanton
- Department of Nutrition and Dietetics, Idaho State University, Pocatello, ID 83201, USA
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