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  1. Article ; Online: Mitochondrial Dysfunction in Down Syndrome: From Pathology to Therapy.

    Tan, Kai-Leng / Lee, Han-Chung / Cheah, Pike-See / Ling, King-Hwa

    Neuroscience

    2022  Volume 511, Page(s) 1–12

    Abstract: Mitochondrial dysfunctions have been described in Down syndrome (DS) caused by either partial or full trisomy of chromosome 21 (HSA21). Mitochondria play a crucial role in various vital functions in eukaryotic cells, especially in energy production, ... ...

    Abstract Mitochondrial dysfunctions have been described in Down syndrome (DS) caused by either partial or full trisomy of chromosome 21 (HSA21). Mitochondria play a crucial role in various vital functions in eukaryotic cells, especially in energy production, calcium homeostasis and programmed cell death. The function of mitochondria is primarily regulated by genes encoded in the mitochondrion and nucleus. Many genes on HSA21 are involved in oxidative phosphorylation (OXPHOS) and regulation of mitochondrial functions. This review highlights the HSA21 dosage-sensitive nuclear-encoded mitochondrial genes associated with overexpression-related phenotypes seen in DS. This includes impaired mitochondrial dynamics, structural defects and dysregulated bioenergetic profiles such as OXPHOS deficiency and reduced ATP production. Various therapeutic approaches for modulating energy deficits in DS, effects and molecular mechanism of gene therapy and drugs that exert protective effects through modulation of mitochondrial function and attenuation of oxidative stress in DS cells were discussed. It is prudent that improving DS pathophysiological conditions or quality of life may be feasible by targeting something as simple as cellular mitochondrial biogenesis and function.
    MeSH term(s) Humans ; Down Syndrome/genetics ; Down Syndrome/therapy ; Quality of Life ; Mitochondria/metabolism ; Mitochondrial Diseases/therapy ; Energy Metabolism
    Language English
    Publishing date 2022-12-07
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 196739-3
    ISSN 1873-7544 ; 0306-4522
    ISSN (online) 1873-7544
    ISSN 0306-4522
    DOI 10.1016/j.neuroscience.2022.12.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Transforaminal Unilateral Biportal Endoscopic Spinal Surgery for Extraforaminal Lumbar Disc Herniation: A Retrospective Observational Study.

    Wu, Chih-Ying / Huang, Hsiang-Ming / Lee, Han-Chung / Tang, Chih-Hsin / Chen, Yung-Hsiang / Chiu, Cheng-Di

    World neurosurgery

    2024  Volume 183, Page(s) e658–e667

    Abstract: Objective: Biportal endoscopic spinal surgery (BESS) is recommended as a safer and less destructive option for lumbar disc herniations. However, limited data exist on clinical outcomes for extraforaminal lumbar disc herniation (ELDH) surgery. This ... ...

    Abstract Objective: Biportal endoscopic spinal surgery (BESS) is recommended as a safer and less destructive option for lumbar disc herniations. However, limited data exist on clinical outcomes for extraforaminal lumbar disc herniation (ELDH) surgery. This retrospective study presents our preliminary experience with transforaminal unilateral BESS for ELDH.
    Methods: Patients with lumbar radiculopathy refractory to conservative treatment, diagnosed with ELDH by magnetic resonance imaging, and treated with transforaminal unilateral BESS in 2021-2023 in 2 institutions in Taiwan were eligible for inclusion. Those with lumbar spondylolisthesis grade 2 or more with segmental instability, history of drug abuse or psychiatric diseases, or with a follow-up duration <1 year were excluded. Primary outcomes included visual analog scale for pain, assessed at 1 week, 1 month, 6 months, and 1 year using generalized estimating equations analysis; success and satisfaction of BESS graded by the Macnab criteria; and perioperative complications. Secondary outcomes were operative time and hospital length of stay.
    Results: Seventeen patients were included in the analysis, with a mean age of 65.8 years; 11 (64.7%) were males and 15 (88.2%) had no prior lumbar spine surgery. mean operative time was 107.9 minutes, and length of stay was 3.5 days. Graded by Macnab criteria, 16 (94.1%) of patients had good to excellent outcomes. Only 1 patient experienced complications. No recurrence/reoperation was observed. Generalized estimating equations analysis showed that postoperative visual analog scale scores decreased significantly at 1 week (adjusted Beta [aBeta] = -5.47, standard error: 0.29, P < 0.001), 1 month (aBeta = -5.82), 6 months (aBeta = -5.88), and 1 year (aBeta = -6.29).
    Conclusions: Transforaminal unilateral BESS is an alternative and feasible method for treating ELDH, producing good surgical outcomes with few complications and sustaining pain improvement. Future studies with larger patient numbers and comparisons between BESS and other minimally invasive techniques for ELDH are warranted.
    MeSH term(s) Male ; Humans ; Aged ; Female ; Intervertebral Disc Displacement/diagnostic imaging ; Intervertebral Disc Displacement/surgery ; Retrospective Studies ; Lumbar Vertebrae/diagnostic imaging ; Lumbar Vertebrae/surgery ; Diskectomy, Percutaneous/methods ; Endoscopy/methods ; Pain/surgery ; Treatment Outcome
    Language English
    Publishing date 2024-01-03
    Publishing country United States
    Document type Observational Study ; Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2023.12.162
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Variation of the photosynthesis and respiration response of filamentous algae (Oedogonium) acclimated to averaged seasonal temperatures and light exposure levels

    Pitawala, Sulochana / Trifunovic, Zlatan / Steele, Joel R. / Lee, Han-Chung / Crosbie, Nicholas D. / Scales, Peter J. / Martin, Gregory J.O.

    Algal Research. 2023 July, v. 74 p.103213-

    2023  

    Abstract: Filamentous algae (FA) have potential advantages over microalgae for wastewater treatment. However, their implementation at a large-scale is hindered by an inability to predict performance. This study compared the cellular responses (photosynthesis and ... ...

    Abstract Filamentous algae (FA) have potential advantages over microalgae for wastewater treatment. However, their implementation at a large-scale is hindered by an inability to predict performance. This study compared the cellular responses (photosynthesis and respiration) and composition (pigments and photosystem proteins) of FA Oedogonium acclimatised to average summer and winter conditions (Melbourne, Australia). After seven days of acclimation the Chl a content of ‘summer acclimated’ (SA) algae was about half that of the ‘winter acclimated’ (WA) algae, which can be related to a cellular strategy to reduce photodamage under high light intensities. No statistically significant changes were observed in any identified proteins associated with photosystem PSII and the reaction centre of PSI. Transmission electron microscopy images revealed more prominent lipid bodies within the SA filaments than in WA filaments, but no discernible difference in the abundance of starch granules. Photosynthetic irradiance curves were compared for the SA and WA algae. Consistent with the differences in chlorophyll, the specific gross photosynthetic rate (μP, gᵣₒₛₛ) was generally higher for the WA algae. The relative difference increased from around 2-fold at 15 °C to 3-fold at 25 °C, and then decreased to <1.5-fold at 30 °C and 35 °C. At all the tested temperatures, saturation irradiance levels were in the range of 75–500 μmol/m²·s. Photoinhibition was observed at 30 °C (above ∼300 μmol/m²·s) and was more severe at 35 °C (above ∼500 μmol/m²·s), with WA algae showing greater inhibition. In contrast, the respiration response was similar for the SA and WA algae. The study emphasises the significance of accounting for seasonal variations and their effects on biomass productivity and utilisation. The data obtained will enable the incorporation of acclimation and its effect on biochemistry and photosynthetic response into predictive models of FA performance in outdoor cultures.
    Keywords Oedogonium ; acclimation ; biomass production ; chlorophyll ; light intensity ; lipids ; microalgae ; photoinhibition ; photosystem II ; starch ; summer ; transmission electron microscopy ; wastewater treatment ; Australia ; Filamentous algae ; Photosynthesis ; Photoacclimation ; Thermal acclimation
    Language English
    Dates of publication 2023-07
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ISSN 2211-9264
    DOI 10.1016/j.algal.2023.103213
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: The Medicago SymCEP7 hormone increases nodule number via shoots without compromising lateral root number.

    Ivanovici, Ariel / Laffont, Carole / Larrainzar, Estíbaliz / Patel, Neha / Winning, Courtney S / Lee, Han-Chung / Imin, Nijat / Frugier, Florian / Djordjevic, Michael A

    Plant physiology

    2022  Volume 191, Issue 3, Page(s) 2012–2026

    Abstract: Legumes acquire soil nutrients through nitrogen-fixing root nodules and lateral roots. To balance the costs and benefits of nodulation, legumes negatively control root nodule number by autoregulatory and hormonal pathways. How legumes simultaneously ... ...

    Abstract Legumes acquire soil nutrients through nitrogen-fixing root nodules and lateral roots. To balance the costs and benefits of nodulation, legumes negatively control root nodule number by autoregulatory and hormonal pathways. How legumes simultaneously coordinate root nodule and lateral root development to procure nutrients remains poorly understood. In Medicago (Medicago truncatula), a subset of mature C-TERMINALLY ENCODED PEPTIDE (CEP) hormones can systemically promote nodule number, but all CEP hormones tested to date negatively regulate lateral root number. Here we showed that Medicago CEP7 produces a mature peptide, SymCEP7, that promotes nodulation from the shoot without compromising lateral root number. Rhizobial inoculation induced CEP7 in the susceptible root nodulation zone in a Nod factor-dependent manner, and, in contrast to other CEP genes, its transcription level was elevated in the ethylene signaling mutant sickle. Using mass spectrometry, fluorescence microscopy and expression analysis, we demonstrated that SymCEP7 activity requires the COMPACT ROOT ARCHITECTURE 2 receptor and activates the shoot-to-root systemic effector, miR2111. Shoot-applied SymCEP7 rapidly promoted nodule number in the pM to nM range at concentrations up to five orders of magnitude lower than effects mediated by root-applied SymCEP7. Shoot-applied SymCEP7 also promoted nodule number in White Clover (Trifolium repens) and Lotus (Lotus japonicus), which suggests that this biological function may be evolutionarily conserved. We propose that SymCEP7 acts in the Medicago shoot to counter balance the autoregulation pathways induced rapidly by rhizobia to enable nodulation without compromising lateral root growth, thus promoting the acquisition of nutrients other than nitrogen to support their growth.
    MeSH term(s) Plant Root Nodulation/genetics ; Plant Roots/metabolism ; Medicago truncatula/metabolism ; Rhizobium/physiology ; Lotus/genetics ; Peptides/metabolism ; Trifolium/metabolism ; Hormones/metabolism ; Nitrogen/metabolism ; Root Nodules, Plant/metabolism ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Symbiosis ; Gene Expression Regulation, Plant
    Chemical Substances Peptides ; Hormones ; Nitrogen (N762921K75) ; Plant Proteins
    Language English
    Publishing date 2022-12-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208914-2
    ISSN 1532-2548 ; 0032-0889
    ISSN (online) 1532-2548
    ISSN 0032-0889
    DOI 10.1093/plphys/kiad012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Trace gas oxidation sustains energy needs of a thermophilic archaeon at suboptimal temperatures.

    Leung, Pok Man / Grinter, Rhys / Tudor-Matthew, Eve / Lingford, James P / Jimenez, Luis / Lee, Han-Chung / Milton, Michael / Hanchapola, Iresha / Tanuwidjaya, Erwin / Kropp, Ashleigh / Peach, Hanna A / Carere, Carlo R / Stott, Matthew B / Schittenhelm, Ralf B / Greening, Chris

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 3219

    Abstract: Diverse aerobic bacteria use atmospheric hydrogen ( ... ...

    Abstract Diverse aerobic bacteria use atmospheric hydrogen (H
    MeSH term(s) Archaea ; Temperature ; Ecosystem ; Oxidation-Reduction ; Acidianus ; Hydrogen
    Chemical Substances Hydrogen (7YNJ3PO35Z)
    Language English
    Publishing date 2024-04-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-47324-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Water-Extracted

    Cheng, An-Yi / Chien, Yi-Chung / Lee, Han-Chung / Hsieh, Yi-Hsien / Yu, Yung-Luen

    Molecules (Basel, Switzerland)

    2020  Volume 25, Issue 16

    Abstract: Glioblastoma is one of the most common and most aggressive brain cancers. The current treatment is mainly surgery, chemotherapy, and radiation therapy, but the results are not satisfactory. ...

    Abstract Glioblastoma is one of the most common and most aggressive brain cancers. The current treatment is mainly surgery, chemotherapy, and radiation therapy, but the results are not satisfactory.
    MeSH term(s) Antineoplastic Agents/chemistry ; Antineoplastic Agents/isolation & purification ; Antineoplastic Agents/pharmacology ; Apoptosis/drug effects ; Cell Line, Tumor ; Cell Movement/drug effects ; Cell Proliferation/drug effects ; Cyclin-Dependent Kinase 2/metabolism ; Cyclins/metabolism ; Epithelial-Mesenchymal Transition/drug effects ; Glioblastoma/pathology ; Humans ; Reishi/chemistry ; S Phase Cell Cycle Checkpoints/drug effects ; Water/chemistry
    Chemical Substances Antineoplastic Agents ; Cyclins ; Water (059QF0KO0R) ; Cyclin-Dependent Kinase 2 (EC 2.7.11.22)
    Language English
    Publishing date 2020-08-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules25163585
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Improving the Identification and Coverage of Plant Transmembrane Proteins in

    Lee, Han Chung / Carroll, Adam / Crossett, Ben / Connolly, Angela / Batarseh, Amani / Djordjevic, Michael A

    Frontiers in plant science

    2020  Volume 11, Page(s) 595726

    Abstract: Plant transmembrane proteins (TMPs) are essential for normal cellular homeostasis, nutrient exchange, and responses to environmental cues. Commonly used bottom-up proteomic approaches fail to identify a broad coverage of peptide fragments derived from ... ...

    Abstract Plant transmembrane proteins (TMPs) are essential for normal cellular homeostasis, nutrient exchange, and responses to environmental cues. Commonly used bottom-up proteomic approaches fail to identify a broad coverage of peptide fragments derived from TMPs. Here, we used mass spectrometry (MS) to compare the effectiveness of two solubilization and protein cleavage methods to identify shoot-derived TMPs from the legume
    Language English
    Publishing date 2020-12-18
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711035-7
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2020.595726
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Incidence of Screw Loosening in Cortical Bone Trajectory Fixation Technique between Single- and Dual-Threaded Screws.

    Chen, Chao-Hsuan / Tu, Chih-Hsiu / Chen, Der-Cherng / Huang, Hsiang-Ming / Chuang, Hao-Yu / Cho, Der-Yang / Bau, Da-Tian / Lee, Han-Chung

    Medicines (Basel, Switzerland)

    2021  Volume 8, Issue 9

    Abstract: Purpose: ...

    Abstract Purpose:
    Language English
    Publishing date 2021-09-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2777965-8
    ISSN 2305-6320
    ISSN 2305-6320
    DOI 10.3390/medicines8090050
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: A new method to visualize CEP hormone-CEP receptor interactions in vascular tissue in vivo.

    Lee, Han-Chung / Binos, Steve / Chapman, Kelly / Pulsford, Sacha B / Ivanovici, Ariel / Rathjen, John P / Djordjevic, Michael A

    Journal of experimental botany

    2021  Volume 72, Issue 18, Page(s) 6164–6174

    Abstract: C-TERMINALLY ENCODED PEPTIDEs (CEPs) control diverse responses in plants including root development, root system architecture, nitrogen demand signalling, and nutrient allocation that influences yield, and there is evidence that different ligands impart ... ...

    Abstract C-TERMINALLY ENCODED PEPTIDEs (CEPs) control diverse responses in plants including root development, root system architecture, nitrogen demand signalling, and nutrient allocation that influences yield, and there is evidence that different ligands impart different phenotypic responses. Thus, there is a need for a simple method that identifies bona fide CEP hormone-receptor pairings in vivo and examines whether different CEP family peptides bind the same receptor. We used formaldehyde or photoactivation to cross-link fluorescently tagged group 1 or group 2 CEPs to receptors in semi-purified Medicago truncatula or Arabidopsis thaliana leaf vascular tissues to verify that COMPACT ROOT ARCHITECTURE 2 (CRA2) is the Medicago CEP receptor, and to investigate whether sequence diversity within the CEP family influences receptor binding. Formaldehyde cross-linked the fluorescein isothiocyanate (FITC)-tagged Medicago group 1 CEP (MtCEP1) to wild-type Medicago or Arabidopsis vascular tissue cells, but not to the CEP receptor mutants, cra2 or cepr1. Binding competition showed that unlabelled MtCEP1 displaces FITC-MtCEP1 from CRA2. In contrast, the group 2 CEP, FITC-AtCEP14, bound to vascular tissue independently of CEPR1 or CRA2, and AtCEP14 did not complete with FITC-MtCEP1 to bind CEP receptors. The binding of a photoactivatable FITC-MtCEP1 to the periphery of Medicago vascular cells suggested that CRA2 localizes to the plasma membrane. We separated and visualized a fluorescent 105 kDa protein corresponding to the photo-cross-linked FITC-MtCEP1-CRA2 complex using SDS-PAGE. Mass spectrometry identified CRA2-specific peptides in this protein band. The results indicate that FITC-MtCEP1 binds to CRA2, MtCRA2 and AtCEPR1 are functionally equivalent, and the binding specificities of group 1 and group 2 CEPs are distinct. Using formaldehyde or photoactivated cross-linking of biologically active, fluorescently tagged ligands may find wider utility by identifying CEP-CEP receptor pairings in diverse plants.
    MeSH term(s) Arabidopsis/genetics ; Arabidopsis Proteins ; Medicago truncatula ; Plant Growth Regulators ; Plant Proteins ; Plant Roots ; Receptors, Peptide
    Chemical Substances Arabidopsis Proteins ; CEPR1 protein, Arabidopsis ; Plant Growth Regulators ; Plant Proteins ; Receptors, Peptide
    Language English
    Publishing date 2021-05-31
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2976-2
    ISSN 1460-2431 ; 0022-0957
    ISSN (online) 1460-2431
    ISSN 0022-0957
    DOI 10.1093/jxb/erab244
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Comparison of radiological outcomes and complications between single-level and multilevel anterior cervical discectomy and fusion (ACDF) by using a polyetheretherketone (PEEK) cage-plate fusion system.

    Lee, Han-Chung / Chen, Chao-Hsuan / Wu, Chih-Ying / Guo, Jeng-Hung / Chen, Yueh-Sheng

    Medicine

    2019  Volume 98, Issue 5, Page(s) e14277

    Abstract: This study aimed to compare the differences in radiological outcomes and complications between single- and multilevel anterior cervical discectomy and fusion (ACDF) by using a polyetheretherketone (PEEK) cage-plate fusion system.Fifty-seven patients who ... ...

    Abstract This study aimed to compare the differences in radiological outcomes and complications between single- and multilevel anterior cervical discectomy and fusion (ACDF) by using a polyetheretherketone (PEEK) cage-plate fusion system.Fifty-seven patients who underwent ACDF via the PEEK cage-plate fusion system were enrolled and subjected to ≥6 months of follow-up. The patients were divided into 4 groups according to different cage-plate implantation levels: 1-level group (n = 17), 2-level group (n = 24), 3-level group (n = 12), and 4-level group (n = 4). Fusion time, changes in segment and global lordotic angle, subsidence rate, and changes in disc and adjacent segmental disc height were subjected to radiological evaluation.The fusion period of multilevel ACDF was longer than that of single-level ACDF. The fusion period of the 3-level (4.09 ± 0.94, P = .004) and 4-level (5.25 ± 0.89, P = .004) group was also significantly longer than that of the 1-level group. The mean lordotic angle in all of the groups was changed in the immediate postoperative period and in the final follow-up. The cage subsidence rates were 11.76% (2/17) in the 1-level group, 20.83% (5/24) in the 2-level group, and 2/12 (16.67%) in the 3-level group. No subsidence occurred in the 4-level groups. Changes in the lower adjacent segmental disc height were significantly increased in multilevel ACDF compared with those in single-level ACDF.Despite the longer fusion time, the outcomes of the proposed system were even better with the greater number of treatment levels by using PEEK cage-plate fusion system. Changes in the lower adjacent segmental disc height should also prolong follow-up duration to investigate the symptomatic adjacent segment degeneration in multilevel ACDF.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Benzophenones ; Cervical Vertebrae/surgery ; Diskectomy/methods ; Female ; Humans ; Internal Fixators ; Ketones ; Male ; Middle Aged ; Polyethylene Glycols ; Polymers ; Spinal Fusion/methods ; Time Factors
    Chemical Substances Benzophenones ; Ketones ; Polymers ; polyetheretherketone (31694-16-3) ; Polyethylene Glycols (3WJQ0SDW1A)
    Language English
    Publishing date 2019-02-15
    Publishing country United States
    Document type Journal Article ; Observational Study
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000014277
    Database MEDical Literature Analysis and Retrieval System OnLINE

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