1.Analysis of a case of hereditary anomalous fibrinogenemia complicated with deep vein thrombosis due to the c.2185G>A vari-ant of FGA gene
Xiaohao PAN ; Wei HE ; Jianfang HUANG ; Xiaoyong ZHENG
Chinese Journal of Clinical Laboratory Science 2024;42(2):117-120
Objective To analyze the deep venous thrombosis(DVT)after plasma infusion in a patient with congenital dysfibrinogene-mia(CD),and explore the relationship between the CD and DVT.Methods The clinical data were collected and the pedigree was investigated(3 subjects of 2 generations in total).The relevant indexes of coagulation factors of the patient and her family members were detected.The genomic DNA of peripheral blood was extracted for PCR amplification.All the exons,flanking sequences,5'and 3'untranslated regions of FGA,FGB and FGG genes of fibrinogen(Fg)of the patient were analyzed by direct sequencing.The corre-sponding mutation site was subjected to sequence in the other members of this family.The PyMol software was used to construct the pro-tein model before and after gene mutation.Results The patient was admitted to hospital for hysteromyomectomy.DVT appeared in 3 days after surgery.The prothrombin time(PT),thrombin time(TT),Fg activity(Fg∶C)and Fg antigen(Fg∶Ag)of the patient was 14.9 s,33.3 s,0.94 g/L and 2.10 g/L,respectively.The above four indicators in her mother were 14.7 s,32.8 s,0.97 g/L and 2.35 g/L,respectively.Gene sequencing revealed that both the patient and her mother had a heterozygous missense mutation c.2185G>A(p.Glu729Lys)in exon 6 of the FGA gene.The protein model analysis demonstrated that p.Glu729Lys mutation changed the amino acid side chain and reduced the number of hydrogen bonds originally formed with Arg854.Conclusion A heterozygous missense mutation c.2185G>A(NM_000508)in exon 6 of the FGA gene should be responsible for the low fibrinogen level in this pedigree,which might be the main reason for DVT after plasma infusion in this patient.
2. Analysis of the effects of different nutritional support methods on postoperative recovery in patients with gastric cancer
Yongqi QIAO ; Wendi GE ; Xiaohao ZHENG ; Yibin XIE
Chinese Journal of Oncology 2019;41(5):378-383
Objective:
To assess the effects of different nutritional support methods on postoperative recovery in patients with gastric cancer.
Methods:
98 patients who received radical gastrectomy were divided into three groups: parenteral nutrition group (PN group) (
3.Improving the prognosis of pancreatic cancer: insights from epidemiology, genomic alterations, and therapeutic challenges.
Zhichen JIANG ; Xiaohao ZHENG ; Min LI ; Mingyang LIU
Frontiers of Medicine 2023;17(6):1135-1169
Pancreatic cancer, notorious for its late diagnosis and aggressive progression, poses a substantial challenge owing to scarce treatment alternatives. This review endeavors to furnish a holistic insight into pancreatic cancer, encompassing its epidemiology, genomic characterization, risk factors, diagnosis, therapeutic strategies, and treatment resistance mechanisms. We delve into identifying risk factors, including genetic predisposition and environmental exposures, and explore recent research advancements in precursor lesions and molecular subtypes of pancreatic cancer. Additionally, we highlight the development and application of multi-omics approaches in pancreatic cancer research and discuss the latest combinations of pancreatic cancer biomarkers and their efficacy. We also dissect the primary mechanisms underlying treatment resistance in this malignancy, illustrating the latest therapeutic options and advancements in the field. Conclusively, we accentuate the urgent demand for more extensive research to enhance the prognosis for pancreatic cancer patients.
Humans
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Pancreatic Neoplasms/therapy*
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Prognosis
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Pancreas/pathology*
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Genetic Predisposition to Disease
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Genomics
4.Kindlin-2 loss in condylar chondrocytes causes spontaneous osteoarthritic lesions in the temporomandibular joint in mice.
Yumei LAI ; Wei ZHENG ; Minghao QU ; Christopher C XIAO ; Sheng CHEN ; Qing YAO ; Weiyuan GONG ; Chu TAO ; Qinnan YAN ; Peijun ZHANG ; Xiaohao WU ; Guozhi XIAO
International Journal of Oral Science 2022;14(1):33-33
The progressive destruction of condylar cartilage is a hallmark of the temporomandibular joint (TMJ) osteoarthritis (OA); however, its mechanism is incompletely understood. Here, we show that Kindlin-2, a key focal adhesion protein, is strongly detected in cells of mandibular condylar cartilage in mice. We find that genetic ablation of Kindlin-2 in aggrecan-expressing condylar chondrocytes induces multiple spontaneous osteoarthritic lesions, including progressive cartilage loss and deformation, surface fissures, and ectopic cartilage and bone formation in TMJ. Kindlin-2 loss significantly downregulates the expression of aggrecan, Col2a1 and Proteoglycan 4 (Prg4), all anabolic extracellular matrix proteins, and promotes catabolic metabolism in TMJ cartilage by inducing expression of Runx2 and Mmp13 in condylar chondrocytes. Kindlin-2 loss decreases TMJ chondrocyte proliferation in condylar cartilages. Furthermore, Kindlin-2 loss promotes the release of cytochrome c as well as caspase 3 activation, and accelerates chondrocyte apoptosis in vitro and TMJ. Collectively, these findings reveal a crucial role of Kindlin-2 in condylar chondrocytes to maintain TMJ homeostasis.
Aggrecans/metabolism*
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Animals
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Cartilage, Articular/metabolism*
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Chondrocytes/pathology*
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Cytoskeletal Proteins/metabolism*
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Mice
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Muscle Proteins/metabolism*
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Osteoarthritis/pathology*
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Temporomandibular Joint/pathology*