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Enhancement of motor functional recovery in thoracic spinal cord injury: voluntary wheel running versus forced treadmill exercise

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Neural Regeneration Research 2025年第3期20卷 836-844页

作者： Do-Hun Lee Dan Cao Younghye Moon Chen Chen Nai-Kui Liu Xiao-Ming Xu Wei Wu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteIndiana University School of MedicineIndianapolisINUSA Department of Neurological Surgery Indiana University School of MedicineIndianapolisINUSA Department of Neuroscience Baylor College of MedicineHoustonTXUSA

Spinal cord injury necessitates effective rehabilitation strategies, with exercise therapies showing promise in promoting recovery. This study investigated the impact of rehabilitation exercise on functional recovery and morphological changes following thoracic contusive spinal cord injury. After a 7-day recovery period after spinal cord injury, mice were assigned to either a trained group(10 weeks of voluntary running wheel or forced treadmill exercise) or an untrained group. Bi-weekly assessments revealed that the exercise-trained group, particularly the voluntary wheel exercise subgroup, displayed significantly improved locomotor recovery, more plasticity of dopaminergic and serotonin modulation compared with the untrained group. Additionally, exercise interventions led to gait pattern restoration and enhanced transcranial magnetic motor-evoked potentials. Despite consistent injury areas across groups, exercise training promoted terminal innervation of descending axons. In summary, voluntary wheel exercise shows promise for enhancing outcomes after thoracic contusive spinal cord injury, emphasizing the role of exercise modality in promoting recovery and morphological changes in spinal cord injuries. Our findings will influence future strategies for rehabilitation exercises, restoring functional movement after spinal cord injury.

关键词： behavioral assessment motor function neural plasticity running wheel exercise spinal cord injury treadmill exercise voluntary exercise

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A lead role for a“secondary”axonal injury response

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Neural Regeneration Research 2025年第2期20卷 469-470页

作者： Melissa A.Rudy Trent A.Watkins Division of Neuroimmunology and Glial Biology Department of NeurologyUniversity of California at San FranciscoSan FranciscoCAUSA Development Disease Modelsand Therapeutics Graduate ProgramBaylor College of MedicineHoustonTXUSA

Stress signaling following axon injury stimulates a transcriptional program for regeneration that might be exploited to promote central nervous system ***,this stress response drives neuronal apoptosis in non-regenerative *** duality presents a quandary for the development of therapeutic interventions:manipulating stress signaling to enhance recovery of damaged neurons risks accelerating neurodegeneration or restricting regenerative *** dichotomy is well illustrated by the fates of retinal ganglion cells(RGCs)following optic nerve *** this central nervous system injury model,disruption of a stress-activated MAP kinase(MAPK)cascade blocks the extensive apoptosis of RGCs that occurs in wild-type mice(Watkins et al.,2013;Welsbie et al.,2017).

关键词： injury axonal stress

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Exploiting fly models to investigate rare human neurological disorders

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Neural Regeneration Research 2025年第1期20卷 21-28页

作者： Tomomi Tanaka Hyung-Lok Chung Department of Neurology Houston Methodist Research InstituteHoustonTXUSA Department of Neurology Weill Cornell Medical CollegeNew YorkNYUSA

Rare neurological diseases,while individually are rare,collectively impact millions globally,leading to diverse and often severe neurological *** attributed to genetic mutations that disrupt protein function or structure,understanding their genetic basis is crucial for accurate diagnosis and targeted *** investigate the underlying pathogenesis of these conditions,researchers often use non-mammalian model organisms,such as Drosophila(fruit flies),which is valued for their genetic manipulability,cost-efficiency,and preservation of genes and biological functions across evolutionary *** tools available in Drosophila,including CRISPR-Cas9,offer a means to manipulate gene expression,allowing for a deep exploration of the genetic underpinnings of rare neurological *** boasts a versatile genetic toolkit,rapid generation turnover,and ease of large-scale experimentation,making it an invaluable resource for identifying potential drug *** can expose flies carrying disease-associated mutations to various compounds,rapidly pinpointing promising therapeutic agents for further investigation in mammalian models and,ultimately,clinical *** this comprehensive review,we explore rare neurological diseases where fly research has significantly contributed to our understanding of their genetic basis,pathophysiology,and potential therapeutic *** discuss rare diseases associated with both neuron-expressed and glial-expressed *** cases include mutations in CDK19 resulting in epilepsy and developmental delay,mutations in TIAM1 leading to a neurodevelopmental disorder with seizures and language delay,and mutations in IRF2BPL causing seizures,a neurodevelopmental disorder with regression,loss of speech,and abnormal *** we explore mutations in EMC1 related to cerebellar atrophy,visual impairment,psychomotor retardation,and gain-of-function mutations in ACOX1 causing Mitchell ***-of-fun

关键词： ACOX1 Drosophila melanogaster glia lipid metabolism model organisms neuroinflammation neurologic disorders neuron rare disease VLCFA

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The varicocele： diagnostic dilemmas, therapeutic challenges and future perspectives

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Asian Journal of Andrology 2016年第2期18卷 276-281,J0007页

作者： Koji Chiba Ranjith Ramasamy Dolores J Lamb Larry I Lipshultz Center for Reproductive medicine Baylor College of Medicine Houston TX USA Scott Department of Urology Baylor College of Medicine Houston TX USA Department of Molecular and Cellular Biology Baylor College of Medicine Houston TX USA.

A varicocele is defined as the abnormal dilation of the internal testicular vein and pampiniform venus plexus within the spermatic cord. If a semen analysis is not obtained from the adolescent male, in the absence of other symptoms, the main clinical indication used by many urologists to recommend repair is testicular atrophy. The varicocele may result in testicular damage in some males causing testicular atrophy with impaired sperm production and decreased Leydig cell function, while in other males the varicocele may seemingly cause no ill effects. In adult men, varicoceles are frequently present and surgically correctable, yet the measurable benefits of surgical repair are slight according to a Cochrane review. While occurring more commonly in infertile men than fertile men, only 20% of men with a documented varicocele will suffer from fertility problems. Most varicoceles found in adolescents are detected during a routine medical examination, and it is difficult to predict which adolescent presenting with a varicocele will ultimately show diminished testicular function in adolescence or adulthood. As in adults, the mainstay of treatment for varicocele in adolescents is surgical correction. However, unlike an adult varicocelectomy （the microsurgical approach is the most common）, treatment for an adolescent varicocele is more often laparoscopic. Nevertheless, the goals of treatment are the same in the adolescent and adult patients. Controversy remains as to which patients to treat, when to initiate the treatment, and what type of treatment is the best. This review will present the current understanding of the etiology, diagnosis and treatment of the adolescent varicocele.

关键词： adolescent adult management varicocele

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Cell-type resolved transcriptomic approaches for dissecting selective vulnerability in neurodgeneration

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Neural Regeneration Research 2024年第7期19卷 1411-1413页

作者： Caleb A.Wood Nicholas M.Tran Department of Neuroscience Baylor College of MedicineHoustonTXUSA Department of Molecular and Human Genetics Baylor College of MedicineHoustonTXUSA

A common feature among neurodegenerative conditions is that ce rtain neuronal populations are selectively vulnerable to loss(Fu et al.,2018).By corollary,other neurons are selectively resilient,suggesting they may possess unique features that support their survival.U nderstanding the basis of neuronal resilience or vulnerability would provide a logical strategy to identify factors that could be targeted therapeutically.

关键词： selective targeted

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Mapping bone marrow niches of disseminated tumor cells

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Science China(Life Sciences) 2017年第10期60卷 1125-1132页

作者： Weijie Zhang Hin Ching Lo Xiang H.-F.Zhang Lester and Sue Smith Breast Center Baylor College of Medicine Houston TX 77030 USA Dan L. Duncan Cancer Center Baylor College of Medicine Houston TX 77030 USA Department of Molecular and Cellular Biology Baylor College of Medicine Houston TX 77030 USA Graduate Program in Integrative Molecular and Biomedical Sciences Baylor College of Medicine Houston TX 77030 USA McNair Medical Institute Baylor College of Medicine Houston TX 77030 USA

Breast cancer cells may disseminate early, before tumor diagnosis. Disseminated tumor cells, or DTCs, reside in the bone marrow, and may persist for years or even decades. Some of these cells may be re-activated to resume aggressive growth, and eventually become overt bone metastases. Recent studies have begun to shed light on this complicated process and revealed multiple steps and intermediate states of colonizing DTCs. However, how cancer-host interactions evolve during this process needs to be further understood. Most of our current knowledge of the bone microenvironment is obtained through studies looking for the hematopoietic stem cell(HSC) niche. Although this long-standing question has not yet been resolved, our search for the HSC niche has resulted in a detailed map of various cell types in the bone marrow. Furthermore, various techniques used to find the HSC niche may also be adapted for finding the cancer cell niche. In this article, we will review the recent progress in both the DTC and HSC areas with a focus on their potential microenvironment niches. We will also discuss how to apply what we have learned from HSC studies to map DTCs in the bone context. We hope to stimulate thoughts and ideas to further elucidate the bone colonization process, and develop potential therapeutic interventions.

关键词： disseminated tumor cells bone marrow niches hematopoietic stem cell niches 3D imaging

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The exploration of N6-deoxyadenosine methylation in mammalian genomes

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Protein & Cell 2021年第10期12卷 756-768页

作者： Xuwen Li Zijian Zhang Xinlong Luo Jacob Schrier Andrew D.Yang Tao P.Wu Department of Molecular and Human Genetics Baylor College of MedicineHoustonTX 77030USA Medical Scientist Training Program Baylor College of MedicineHoustonTX 77030USA Huffington Center on Aging Baylor College of MedicineHoustonTX 77030USA Dan L Duncan Comprehensive Cancer Center Baylor College of MedicineHoustonTX 77030USA

N^(6)-methyladenine(N^(6)-mA,m^(6)dA,or 6mA),a prevalent DNA modification in prokaryotes,has recently been identified in higher eukaryotes,including *** 6mA has been well-studied in prokaryotes,the function and regulatory mechanism of 6mA in eukaryotes are still poorly *** studies indicate that 6mA can serve as an epigenetic mark and play critical roles in various biological processes,from transposable-element suppression to environmental stress ***,we review the significant advances in methodology for 6mA detection and major progress in understanding the regulation and function of this non-canonical DNA methylation in eukaryotes,predominantly mammals.

关键词： DNA N^(6)-methyladenine(6mA) mammalian DNA modification norvcanonical mammalian DNA methylation

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Biomarkers of neurodegenerative disorders: How good are they?

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Cell Research 2004年第5期14卷 347-358页

作者： Varun RACHAKONDA Department of Neurology baylor college of medicine houston TX USA

Biomarkers are very important indicators of normal and abnormal biological processes. Specific changes in pathologies, biochemistries and genetics can give us comprehensive information regarding the nature of any particular disease. A good biomarker should be precise and reliable, distinguishable between normal and interested disease, and differential between different diseases. It is believed that biomarkers have great potential in predicting chances for diseases, aiding in early diagnosis, and setting standards for the development of new remedies to treat diseases. New technologies have enabled scientists to identify biomarkers of several different neurodegenerative diseases. The followings, for instance, are only a few of the many new biomarkers that have been recently identified: the phosphorylated tau protein and aggregated β-amyloid peptide for Alzheimer’s disease (AD), α-synuclein contained Lewy bodies and altered dopamine transporter (DAT) imaging for Parkinson’s disease (PD), SOD mutations for familial amyotrophic lateral sclerosis (ALS), and CAG repeats resulted from Huntington’s gene mutations in Huntington’s disease (HD). This article will focus on the most-recent findings of biomarkers belonging to the four mentioned neurodegenerative diseases.

关键词： Alzheimer’s disease Parkinson’s disease Amyotrophic Lateral Sclerosis Huntington’s disease biomarkers.

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Successful Vaginal Delivery after Implantable Cardiac Defibrillator Placement for Management of Ventricular Tachycardia

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Congenital Heart Disease 2021年第2期16卷 137-139页

作者： Sara Moufarrij Manisha Gandhi Wilson Lam Angeline Opina Department of Obstetrics and Gynecology Baylor College of MedicineHoustonUSA Department of Pediatric Cardiology Baylor College of MedicineHoustonUSA

A 23-year-old female with Tetralogy of Fallot who is 30w6d pregnant presented with palpitations and syncope from an outside *** was found to have ventricular *** placement of a transvenous implantable cardiac defibril... 详细信息

关键词： Ventricular tachycardia pregnancy intracardiac defibrillatory

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Counting your sperm before they fertilize： are sperm counts really declining？

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Asian Journal of Andrology 2013年第2期15卷 179-183,I0004,I0005页

作者： Alexander W Pastuszak Dolores J Lamb Scott Department of Urology Baylor College of Medicine Houston TX 77030 USA Center for Reproductive medicine Baylor College of Medicine Houston TX 77030 USA Department of Molecular Cell Biology Baylor College of Medicine Houston TX 77030 USA

Apurported global decline in sperm counts has been a source of controversy since the early 1990s. Numerous studies performed since then, as well as reanalysis of the original data, show either no changes, or even increases, in sperm concentrations over time. In this review, we discuss the 1992 meta-analysis that initiated the continuing debate on whether sperm concentrations are declining, and the com- munity discussion surrounding it over the past two decades. We also highlight studies evaluating sperm concentrations performed since the initial study that produced different results, and conclude that no definitive cause for a decrease in sperm counts has been established, and the effects of geography and environment on sperm counts are unclear.

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