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Lee JH, Hwang J, Park H, Kang H, Song W, Choi DA, Seong CH, Jang WY. Muscle strength and foot pressure vary depending on the type of foot pain. Sci Rep 2024; 14:5857. [PMID: 38467691 PMCID: PMC10928145 DOI: 10.1038/s41598-024-56490-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/07/2024] [Indexed: 03/13/2024] Open
Abstract
This study compared muscle strength and foot pressure among patients with metatarsalgia, patients with plantar fasciitis, and healthy controls. A total of 31 patients with foot pain (14 metatarsalgia and 17 plantar fasciitis) and 29 healthy controls participated in the study. The strengths of the plantar flexor and hip muscles were measured using isokinetic and handheld dynamometers, respectively. Foot pressure parameters, including the pressure-time integral (PTI) and foot arch index (AI), were assessed using pedobarography. Compared with the healthy control group, plantar flexor strength was significantly reduced in the affected feet of the metatarsalgia and plantar fasciitis groups (F = 0.083, all p < 0.001); however, hip strength was significantly decreased only in the affected feet of the metatarsalgia group (F = 20.900, p < 0.001). Plantar flexor (p < 0.001) and hip (p = 0.004) strength were significantly lower in the metatarsalgia group than in the plantar fasciitis group. The PTI was lower in the forefeet of the affected feet in the metatarsalgia (p < 0.001) and plantar fasciitis (p = 0.004) groups. Foot AI (p < 0.001) was significantly reduced only in the metatarsalgia group. These results suggest the need to consider the evaluation of muscle strength and foot pressure in both feet for the diagnosis and treatment of foot pain.
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Affiliation(s)
- Jin Hyuck Lee
- Department of Sports Medical Center, Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
- Institute of Nanobiomarker-Based Medicine, Korea University, Seoul, Korea
| | - Jangsun Hwang
- Institute of Nanobiomarker-Based Medicine, Korea University, Seoul, Korea
| | | | | | | | | | | | - Woo Young Jang
- Department of Sports Medical Center, Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
- Department of Orthopedic Surgery, College of Medicine, Korea University, 73, Inchon-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
- Institute of Nanobiomarker-Based Medicine, Korea University, Seoul, Korea.
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Lee H, Park HG, Lim YR, Lee IS, Kim BJ, Seong CH, Chun YJ, Kim D. Functional expression and characterization of recombinant NADPH-P450 reductase from Malassezia globosa. J Microbiol Biotechnol 2012; 22:141-6. [PMID: 22297231 DOI: 10.4014/jmb.1107.07058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Malassezia globosa is a common pathogenic fungus that causes skin diseases including dandruff and seborrheic dermatitis in humans. Analysis of its genome identified a gene (MGL_1677) coding for a putative NADPH-P450 reductase (NPR) to support the fungal cytochrome P450 enzymes. The heterologously expressed recombinant M. globosa NPR protein was purified, and its functional features were characterized. The purified protein generated a single band on SDS-PAGE at 80.74 kDa and had an absorption maximum at 452 nm, indicating its possible function as an oxidized flavin cofactor. It evidenced NADPH-dependent reducing activity for cytochrome c or nitroblue tetrazolium. Human P450 1A2 and 2A6 were able to successfully catalyze the O-deethylation of 7- ethoxyresorufin and the 7-hydroxylation of coumarin, respectively, with the support of the purified NPR. These results demonstrate that purified NPR is an orthologous reductase protein that supports cytochrome P450 enzymes in M. globosa.
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Affiliation(s)
- Hwayoun Lee
- Department of Biological Sciences and Center for Biotechnology Research at UBITA (CBRU), Konkuk University, Seoul, 143-701, Korea
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