Publications by authors named "Sha Sun"

Using panel data for 284 Chinese cities, this study explores the nonlinear relationship between the digital economy and the synergistic governance efficiency of industrial pollution and CO emissions (SGEIPCE). The study also investigates the transmission mechanism of two-way knowledge flows within this relationship using the double fixed effect model and two-stage least square method. The results show that the digital economy has a significant U-shaped relationship on the SGEIPCE: the impact first decreases and then increases.

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  • Plasticity in cancer enables tumor cells to switch states, contributing to tumor diversity and challenges in treatment.
  • XIST long noncoding RNA is found to be down-regulated in ovarian cancer, correlating with increased cancer stemness and poorer patient outcomes.
  • Reducing XIST levels in ovarian cancer cells enhances stemness and alters cell characteristics under specific conditions, highlighting XIST as a potential target for therapies in CSC-rich tumors.
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In organisms with the XY sex-determination system, there is an imbalance in the inheritance and transmission of the X chromosome between males and females. Unlike an autosomal allele, an X-linked recessive allele in a female will have phenotypic effects on its male counterpart. Thus, genes located on the X chromosome are of particular interest to researchers in molecular evolution and genetics.

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  • Alterations in zinc transporter expression help protect cardiac cells from ischemia/reperfusion (I/R) injury due to zinc loss, though the exact mechanisms are still unclear.
  • Zinc deficiency leads to the degradation of the protein PIAS3, which is essential for activating STAT3 and increasing the expression of zinc transporter genes.
  • The RING finger domain of PIAS3 plays a key role in its degradation and inhibition of STAT3, with studies showing that knocking down PIAS3 can increase cardiac zinc levels and reduce heart damage during I/R, while its overexpression worsens the injury.
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Introduction: Leaky gut has been linked to autoimmune disorders including lupus. We previously reported upregulation of anti-flagellin antibodies in the blood of lupus patients and lupus-prone mice, which led to our hypothesis that a leaky gut drives lupus through bacterial flagellin-mediated activation of toll-like receptor 5 (TLR5).

Methods: We created MRL/ mice with global deletion through CRISPR/Cas9 and investigated lupus-like disease in these mice.

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  • The endoplasmic reticulum (ER) is a crucial membrane system in eukaryotic cells, consisting of a network of tubules and sheets that connects various organelles.
  • This network plays a key role in organelle positioning, remodeling, and facilitates lipid exchange and important signaling processes.
  • The review highlights recent discoveries about ER interactions with several organelles, including mitochondria, Golgi, and lysosomes, and discusses their molecular mechanisms and physiological implications.
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The prevalence and progression of cancer differ in males and females, and thus, sexual dimorphism in tumor development directly impacts clinical research and medicine. Long non-coding RNAs (lncRNAs) are increasingly recognized as important players in gene expression and various cellular processes, including cancer development and progression. In recent years, lncRNAs have been implicated in the differences observed in cancer incidence, progression, and treatment responses between men and women.

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Spatially coupled low density parity check (SC-LDPC) are prominent candidates for future communication standards due to their "threshold saturation" properties. To evaluate the finite-length performance of SC-LDPC codes, a general and efficient finite-length analysis from the perspective of the base matrix is proposed. We analyze the evolution of the residual graphs resulting at each iteration during the decoding process based on the base matrix and then derive the expression for the error probability.

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Temporal lobe epilepsy (TLE) is a common and severe epilepsy displaying rhythmicity in humans and animals. However, how the circadian clock contributes to TLE remains elusive. A recent circadian analysis of the ventral hippocampal transcriptome of pilocarpine-induced TLE mice revealed as many as 1650 rhythmically expressed transcripts.

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Epilepsy is a neurological disorder characterized by hypersynchronous recurrent neuronal activities and seizures, as well as loss of muscular control and sometimes awareness. Clinically, seizures have been reported to display daily variations. Conversely, circadian misalignment and circadian clock gene variants contribute to epileptic pathogenesis.

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Membrane dynamics are important to the integrity and function of mitochondria. Defective mitochondrial fusion underlies the pathogenesis of multiple diseases. The ability to target fusion highlights the potential to fight life-threatening conditions.

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The future trends and development trajectory of China's carbon emissions trading scheme (ETS), one of the key policy instruments for curbing peak carbon emissions and achieving carbon neutrality, have drawn a lot of interest. However, the Porter hypothesis (PH) and its validity boundary have not been explored sufficiently. We use micro-firm data from 2010 to 2019 to investigate whether the triple-difference (DDD) method could reveal the weak PH on the policy viewing ETS as a quasi-natural experiment in this work.

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One-third of newly synthesized proteins in mammals are translocated into the endoplasmic reticulum (ER) through the Sec61 translocon. How protein translocation coordinates with chaperone availability in the ER to promote protein folding remains unclear. We find that marginally hydrophobic signal sequences and transmembrane domains cause transient retention at the Sec61 translocon and require the luminal BiP chaperone for efficient protein translocation.

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DNA nanotubes with prescribed geometry could allow for nanomaterial organization with designed optical or electrical function. As one of the dominating driving forces for DNA nanotube assembly, intrinsic curvature and twist of building blocks can be induced by bending deformation and twisting deformation. However, it is still unknown that how bending and twisting design on nanoscale building blocks affects the geometry of DNA tubes with micrometer length.

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Commensal bacteria and the immune system have a close and strong relationship that maintains a balance to control inflammation. Alterations of the microbiota, known as dysbiosis, can direct reactivity to self-antigens not only in the intestinal mucosa but also at the systemic level. Our laboratory previously reported gut dysbiosis, particularly lower abundance of bacteria in the family , in lupus-prone MRL/ mice, a model of systemic autoimmunity.

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Mammalian placenta formation requires continuous fusion of trophoblasts. Human endogenous retrovirus-derived proteins syncytin-1 and syncytin-2 mediate cell-cell fusion of placental cytotrophoblasts to form syncytiotrophoblasts in primates, which is required for normal placenta function and fetal development. Syncytins are post-translationally cleaved by the endoprotease furin into surface (SU) and transmembrane (TM) subunits for activation.

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MRL/lpr mice have been extensively used as a murine model of lupus. Disease progression in MRL/lpr mice can differ among animal facilities, suggesting a role for environmental factors. We noted a phenotypic drift of our in-house colony, which was the progeny of mice obtained from The Jackson Laboratory (JAX; stocking number 000485), that involved attenuated glomerulonephritis, increased splenomegaly, and reduced lymphadenopathy.

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is the master regulator of X-Chromosome Inactivation (XCI), the mammalian dosage compensation mechanism that silences one of the two X chromosomes in a female cell. XCI is established during early embryonic development. transgene (Tg) integrated into an autosome can induce transcriptional silencing of flanking genes; however, the effect and mechanism of RNA on autosomal sequence silencing remain elusive.

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The endoplasmic reticulum (ER) is the main harbor for newly synthesized proteins in eukaryotic cells. Through a continuous membrane network of sheets and tubules, the ER hosts secretory proteins, integral membrane proteins, and luminal proteins of the endomembrane system. These proteins are translated by ribosomes outside the ER and require subsequent integration into or translocation across the lipid bilayer of the ER.

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Misfolded proteins in the endoplasmic reticulum (ER) activate IRE1α endoribonuclease in mammalian cells, which mediates XBP1 mRNA splicing to produce an active transcription factor. This promotes the expression of specific genes to alleviate ER stress, thereby attenuating IRE1α. Although sustained activation of IRE1α is linked to human diseases, it is not clear how IRE1α is attenuated during ER stress.

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Knowledge about the special characteristics of HIV-1 envelope (env) glycoproteins in rare individuals developing >90% neutralization breadth in Chinese subtype B' slow progressors may provide insights for vaccine design against local viruses. We performed a cross-sectional analysis on 7 samples. We tested the neutralization breadth and geometric mean ID50 titers (GMTs) of these samples, and divided them into hBCN+ and hBCN- group according to whether their neutralization breadth >90%.

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  • A study reveals that the length of C-terminal transmembrane domains (C-TMDs) is crucial for the effective insertion and assembly of membrane proteins in the endoplasmic reticulum (ER).
  • Membrane proteins with shorter C-TMDs (less than ~60 amino acids) struggle to be inserted into the ER and can be retained for assembly with partner proteins, while proteins with longer tails (>80 residues) are quickly released, often leading to inefficient assembly.
  • The research highlights the importance of tail length and hydrophobicity as essential factors that determine both the insertion process and assembly efficiency of membrane proteins within the ER.
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Growing evidence has demonstrated that Insig-1 is intricately involved in lipid metabolism regulation and the progression of lipid disorders. Our review summarizes updated information on the role and underlying mechanisms of Insig-1 in lipid metabolism dyshomeostasis and lipid disorders. As a member of the insulin-induced gene family, insulin-induced gene 1 (Insig-1) is a six-span transmembrane protein embedded in the endoplasmic reticulum (ER) membrane.

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