Publications by authors named "Ren-Jie Xu"

Background: High tibial osteotomy (HTO) is a well-established surgical procedure employed to treat medial compartment knee osteoarthritis by modifying the mechanical axis of the lower limb, thereby reducing the load on the affected joint. It has gained increased attention in recent years, resulting in numerous research advancements in this field.

Methods: The top 100 most-cited papers on HTO, published between 1970 and 2023, were identified by searching the Web of Science Core Collection database.

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  • * Collectively, these articles received 39,548 citations, with the U.S. being the leading contributor and Harvard University having the most cited papers.
  • * The research highlights keywords related to axon regeneration, emphasizing the increasing importance of "local delivery" systems, while also acknowledging ongoing challenges in optimizing these technologies for clinical use.
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  • A new technique called intraosseous regional administration (IORA) is being tested for delivering cefazolin, an antibiotic, directly into the knee area to provide better infection prevention during knee surgeries.
  • The study involved 12 rabbits, comparing the effects of a traditional intravenous injection of cefazolin to administering it directly into the bone marrow of the knee.
  • Results showed that IORA led to significantly higher and sustained cefazolin levels in the blood compared to the intravenous method, suggesting it could be a more effective way to prevent infections during knee operations.
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  • A 44-year-old woman with severe hip pain and dysfunction was diagnosed with arthritis caused by arteriovenous malformations (AVMs) and required a total hip replacement (THR).
  • Imaging studies revealed significant joint damage and AVMs, prompting a complex surgical approach that included vascular embolization and careful blood management due to the risk of hemorrhage.
  • Post-surgery, the patient showed significant improvement in hip function, with a notable increase in her Harris Hip Scale score, and her clinical symptoms were greatly alleviated after one year of follow-up.
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Purpose/aim: Bone defects caused by trauma, tumors, congenital malformation, or inflammation are very common in orthopedics. In recent years, mimicking the composition and structure of natural bone tissue has become a hot topic in biomaterial research, with the aim of developing an ideal biomaterial for bone defect transplantation. Here, the feasibility of a biphasic calcium phosphate (BCP)/acylated methacrylate gelatin (GelMA) composite hydrogel to repair bone defects was evaluated in vitro and in rats.

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Introduction: Previous studies have demonstrated that exposed to the initial suboptimal intrauterine environment of gestational diabetes mellitus (GDM) may increase risk of cardiovascular disease in adulthood.

Methods: In order to investigate the underlying mechanisms involved in the increased risk of cardiovascular diseases (CVDs) in the offspring of GDM, we applied a high-throughput proteomics approach to compare the proteomic expression profile of human umbilical vessels of normal and GDM offspring.

Results: A total of significantly different 100 proteins were identified in umbilical vessels from GDM group compared with normal controls, among which 31 proteins were up-regulated, while 69 proteins were down-regulated.

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  • Accessory bones, like os subcalcis, are common foot variations usually asymptomatic but can cause pain if located near important structures like the plantar fascia.* -
  • A 55-year-old man experienced progressive left heel pain for 8 years due to a large os subcalcis found through imaging; he underwent surgery to remove it.* -
  • The case emphasizes the need for awareness of os subcalcis to prevent misdiagnosis of heel pain in similar situations.*
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Objective: To compare early clinical effects of the femoral neck system (FNS) and three cannulated screws for the treatment of patients with unstable femoral neck fractures.

Methods: A retrospective analysis with pair matching of 81 patients who received FNS or cannulated screw internal fixation for Pauwels type-3 femoral neck fracture in our hospital from January 2019 to December 2019 was conducted. Patients who received FNS were the test group, and those who received cannulated screws comprised the control group.

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  • A new analytical method combining hydrophilic interaction ultra-performance liquid chromatography and mass spectrometry (HILIC-UHPLC-QTRAP®/MS) was developed to analyze neurotransmitters in urine samples of patients with varying stages of dementia.
  • The method utilizes ultrasound-assisted ionic liquid microextraction (UA-IL-DLLME) to efficiently prepare samples, with optimized conditions for extraction established through experimental design.
  • Findings indicated significant variations in neurotransmitters like GABA, acetylcholine, and glutamic acid across different dementia stages, suggesting their potential as biomarkers for diagnosis and classification of dementia.
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The anatomical structure of the mammalian cerebral cortex is the essential foundation for its complex neural activity. This structure is developed by proliferation, differentiation, and migration of neural progenitor cells (NPCs), the fate of which is spatially and temporally regulated by the proper gene. This study was used in utero electroporation and found that the well-known oncogene c-Myc mainly promoted NPCs' proliferation and their transformation into intermediate precursor cells.

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  • Recent research identifies a new role for telomerase reverse transcriptase (TERT) in regulating axon regeneration in the mammalian central nervous system (CNS).
  • The study highlights a signaling pathway involving c-Myc, TERT, and p53 that controls sensory axon growth.
  • Overexpressing p53 in sensory neurons and retinal cells can significantly enhance the regeneration of sensory axons and optic nerves, presenting new opportunities for improving CNS healing.
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While axon regeneration is a key determinant of functional recovery of the nervous system after injury, it is often poor in the mature nervous system. Influx of extracellular calcium (Ca ) is one of the first phenomena that occur following axonal injury, and calcium/calmodulin-dependent protein kinase II (CaMKII), a target substrate for calcium ions, regulates the status of cytoskeletal proteins such as F-actin. Herein, we found that peripheral axotomy activates CaMKII in dorsal root ganglion (DRG) sensory neurons, and inhibition of CaMKII impairs axon outgrowth in both the peripheral and central nervous systems (PNS and CNS, respectively).

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The inflammatory response is a critical regulator for the regeneration of axon following nervous system injury. Nuclear factor-kappa B (NF-κB) is characteristically known for its ubiquitous role in the inflammatory response. However, its functional role in adult mammalian axon growth remains elusive.

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Background: Steroids such as glucocorticoid have been widely used for their excellent anti-inflammatory, anti-immune, and anti-shock properties. However, the long-term use in high doses has been found to cause necrosis of femoral head and other serious adverse reactions. Thus, it is of great importance to safely use these medications on patients without inducing bone necrosis.

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  • A new Gram-negative bacterium named strain NSL10(T) was isolated from soil at a chemical factory in Hongan, China, characterized by its yellow pigment and rod shape.
  • The bacterium grows best at pH 7.0 and 30°C without NaCl, and has specific biochemical traits, including positive tests for catalase and oxidase.
  • Based on genetic analysis and chemical composition of lipids, strain NSL10(T) is proposed as a novel species in the genus Devosia, officially named Devosia honganensis sp. nov. with the type strain NSL10(T).
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Objective: To compare the clinical application in the percutaneous vertebroplasty under the guidance of one or two C-arm fluoroscopes.

Methods: One hundred forty three elderly patients with Osteoporotic vertebral compression fractures (OVCFs) underwent percutaneous vertebroplasty under the guidance of one or two C-arm fluoroscopes. The number of pulsed imagings, the time of operation and the incidence of cement leakage were recorded.

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