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INTRODUCTION: Sessile plants engage in trade-offs between growth and defense capacity in response to fluctuating environmental cues. MYB is an important transcription factor that plays many important roles in controlling plant growth and defense. However, the mechanism behind how it keeps a balance between these two physiological processes is still largely unknown. OBJECTIVES: Our work focuses on the dissection of the molecular mechanism by which GhMYB33 regulates plant growth and defense. METHODS: The CRISPR/Cas9 technique was used to generate mutants for deciphering GhMYB33 functions. Yeast two-hybrid, luciferase complementary imaging, and co-immunoprecipitation assays were used to prove that proteins interact with each other. We used the electrophoretic mobility shift assay, yeast one-hybrid, and luciferase activity assays to analyze GhMYB33 acting as a promoter. A ß-glucuronidase fusion reporter and 5' RNA ligase mediated amplification of cDNA ends analysis showed that ghr-miR319c directedly cleaved the GhMYB33 mRNA. RESULTS: Overexpressing miR319c-resistant GhMYB33 (rGhMYB33) promoted plant growth, accompanied by a significant decline in resistance against Verticillium dahliae. Conversely, its knockout mutant, ghmyb33, demonstrated growth restriction and concomitant augmentation of V. dahliae resistance. GhMYB33 was found to couple with the DELLA protein GhGAI1 and bind to the specific cis-elements of GhSPL9 and GhDFR1 promoters, thereby modulating internode elongation and plant resistance in V. dahliae infection. The ghr-miR319c was discovered to target and suppress GhMYB33 expression. The overexpression of ghr-miR319c led to enhanced plant resistance and a simultaneous reduction in plant height. CONCLUSION: Our findings demonstrate that GhMYB33 encodes a hub protein and controls the expression of GhSPL9 and GhDFR1, implicating a pivotal role for the miR319c-MYB33 module to regulate the trade-offs between plant growth and defense.
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Correlated with such hepatic-systemic factors as cirrhosis, inflammation and immunity, portal vein thrombosis (PVT) is common in perioperative period of liver transplantation (LT) recipients.It affects negatively surgical procedures and outcomes due to its insidious onset and atypical clinical symptoms.With continuous improvements of LT techniques and refining of medical imaging, researchers have gained further insights into the pathophysiological processes, screening, diagnoses, evaluations, classifications and perioperative managements of PVT.This review focused upon perioperative managements of LT recipients with PVT to enhance the clinical problem-solving capability and long-term patient survival.
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Objective:To explore the effects of novel coronaviral infection on the outcomes of liver transplantation recipients.Methods:The relevant clinical data were retrospectively reviewed for 5 liver transplantation recipients infected with novel coronavirus during perioperative period at First Hospital of Shanxi Medical University.At the same time, "liver transplantation" and "novel coronavirus" and "2019 novel coronavirus" or "SARS-CoV-2" were employed as Chinese and English keywords respectively for searching the relevant literature items of CNKI, Wanfang and PubMed from the inception of database until February 2023.The impact of perioperative novel coronaviral infection was examined on the outcomes of liver transplantation recipients.Results:From November 2022 to January 2023, liver transplantation was performed in 5 recipients of donated liver after death.Two cases tested positive for real-time polymerase chain reaction(RT-PCR)at Day 14/20 pre-operation and converted into negative post-operation.Three cases were infected with SARS-CoV-2 at Day 1/10/16 post-operation.And one of them became feverish again at Day 11 post-infection.With a peak temperature of 39.5 degrees, it rapidly progressed into multiple organ failures of heart, lung and kidney.After active interventions, organ function gradually recovered.Through literature searches, 9 eligible English literature items were retrieved.However, there was no Chinese entry.Among 15 liver transplantation recipients with SARS-CoV-2 infection, one died from septic shock, another from graft failure and the remainders survived.Conclusions:liver transplantation recipients infected with SARS-CoV-2 and negative RT-PCR pre-operation are asymptomatic.Without signs of pneumonia on chest CT, transplantation may be performed.For post-liver transplantation recipients with early SARS-CoV-2 infection, close monitoring of important organ functions such as heart, lung, liver and kidney, timely antiviral regimen and tapered use of immunosuppression can achieve a decent prognosis.
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The open reading frame of Spinacia oleracea Betaine Aldehyde Dehydrogenase (SoBADH) was retrieved from Spinacia oleracea and inserted into the Agrobacterium tumefaciens binary vector pBin438, which was driven by CaMV35S promoter, and produced the new binary vector pBSB. A. tumefaciens LBA4404 carrying this plasmid was used in genetic transformation of plants. Forty-five primary transgenic plants were detected by PCR and verified by the Southern blotting from 65 regenerated plants, of which 27 transgenic plants had only one copy of T-DNA. The Northern blotting and Western blotting analysis indicated that the SoBADH gene had been transcribed mRNA and expression protein in the transgenic cotton lines. The testing of SoBADH activity of transgenic plant leaves showed that the enzyme activity was much higher than that of the non-transgenic cotton. The growth of transgenic plants was well under the salinity and freezing stress, whereas the non-transgenic plant grew poorly and even died. Challenging with salinity, the height and fresh weight of transgenic plants was higher compared with those of non-transgenic plants. Under the freezing stress, the relative conductivity of leaf electrolyte leakage of the transgenic cotton lines was lower than that of non-transgenic plants. These results demonstrated that the SoBADH gene could over express in the exogenous plants, and could be used in genetic engineering for cotton stress resistance.