| 1 | 膝关节Rosenberg位片上影像学分级与内侧开放楔形胫骨高位截骨术术后临床疗效的关系探讨显示文摘目的探讨与内侧开放楔形胫骨高位截骨术(open-wedge high-tibialosteotomy,OWHTO)术后临床疗效最密切相关的影像学分级方法,并找出与OWHTO预后相关的有利和不利因素。方法分析79例膝骨关节炎伴固有胫骨内翻畸形的患者,均接受OWHTO治疗。根据改良关节镜下Outerbridge分级以及影像学Kellgren-Lawrence(K-L)分级进行骨关节炎严重程度评估,影像学检查包括站立前后位(anteroposterior,AP)及屈曲45°后前(posteroanterior,PA)负重位(Rosenberg位)。临床疗效采用牛津膝关节评分(Oxford knee score,OKS)进行评估,包括术前和术后2年的随访。采用多元回归分析相关数据。结果随访2年,OKS评分均值由(20±4)分提高到(39±5)分(P<0.001)。平均机械胫股角由内翻的(6.9±3.4)°变为外翻的(2.7±2.8)°,胫骨近端内侧角(medial proximal tibial angle,MPTA)由(85.6±2.4)°变为(92.9±3.7)°(P<0.001)。术前膝关节站立前后位上K-L分级为(2.4±0.9)分,Rosenberg位上K-L分级为(2.8±0.9)分(P=0.003),关节镜下改良Outerbridge骨关节炎分级为(3.4±0.7)分。在多元回归分析中,Rosenberg位下K-L分级(P=0.01)、术后MPTA值(P=0.01)与术后2年随访的OKS评分呈显著负相关(P=0.01)。结论采用三种不同的骨关节炎分级方案(分别是改良关节镜下Outerbridge分级、站立前后位的K-L分级、Rosenberg位的K-L分级)来确定HTO手术指证,其中基于Rosenberg位的K-L分级与OWHTO术后OKS评分呈显著负相关,这与Rosenberg位下股骨髁与胫骨髁距离最近有关。说明基于Rosenberg位的K-L分级对HTO手术指证评估以及对晚期膝骨关节炎患者临床疗效的评估具有重要意义。 | Kyung Wook Nha Seung Min Oh Yoon Won Ha Manoj Kumar Patel Ji Hyun Seo Byung Hoon Lee 黄景星(整理) 王浩浩(整理) 张民(整理) | 2019 | 实用骨科杂志2019，25，10： | 4 |
| 2 | MFSD7c functions as a transporter of choline at the blood–brain barrier显示文摘Mutations in the orphan transporter MFSD7c(also known as Flvcr2),are linked to Fowler syndrome.Here,we used Mfsd7c knockout(Mfsd7c–/–)mice and cell-based assays to reveal that MFSD7c is a choline transporter at the blood–brain barrier(BBB).We performed comprehensive metabolomics analysis and detected differential changes of metabolites in the brains and livers of Mfsd7c–/–embryos.Particularly,we found that choline-related metabolites were altered in the brains but not in the livers of Mfsd7c–/–embryos.Thus,we hypothesized that MFSD7c regulates the level of choline in the brain.Indeed,expression of human MFSD7c in cells significantly increased choline uptake.Interestingly,we showed that choline uptake by MFSD7c is greatly increased by choline-metabolizing enzymes,leading us to demonstrate that MFSD7c is a facilitative transporter of choline.Furthermore,single-cell patch clamp analysis showed that the import of choline by MFSD7c is electrogenic.Choline transport function of MFSD7c was shown to be conserved in vertebrates,but not in yeasts.We demonstrated that human MFSD7c is a functional ortholog of HNM1,the yeast choline importer.We also showed that several missense mutations identified in patients exhibiting Fowler syndrome had abolished or reduced choline transport activity.Mice lacking Mfsd7c in endothelial cells of the central nervous system suppressed the import of exogenous choline from blood but unexpectedly had increased choline levels in the brain.Stable-isotope tracing study revealed that MFSD7c was required for exporting choline derived from lysophosphatidylcholine in the brain.Collectively,our work identifies MFSD7c as a choline exporter at the BBB and provides a foundation for future work to reveal the disease mechanisms of Fowler syndrome. | Xuan Thi Anh Nguyen Thanh Nha Uyen Le Toan Q.Nguyen Hoa Thi Thuy Ha Anna Artati Nancy C.P.Leong Dat T.Nguyen Pei Yen Lim Adelia Vicanatalita Susanto Qianhui Huang Ling Fam Lo Ngah Leong Isabelle Bonne Angela Lee Jorge L.Granadillo Catherine Gooch Dejie Yu Hua Huang Tuck Wah Soong Matthew Wook Chang Markus R.Wenk Jerzy Adamski Amaury Cazenave-Gassiot Long N.Nguyen | 2024 | Cell Research2024，34，3： | 0 |
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