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Molecular Pathology of Human Knee Arthrofibrosis Defined by RNA Sequencing

ABSTRACT: Molecular Pathology of Human Knee Arthrofibrosis Defined by RNA Sequencing

PROVIDER: PRJNA560339 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9971400_1.fastq.gz	Fastqsanger.gz
	SRR9971400_2.fastq.gz	Fastqsanger.gz
	SRR9971401_1.fastq.gz	Fastqsanger.gz
	SRR9971401_2.fastq.gz	Fastqsanger.gz
	SRR9971402_1.fastq.gz	Fastqsanger.gz

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Molecular Pathology of Human Knee Arthrofibrosis Defined by RNA Sequencing

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Molecular pathology of human knee arthrofibrosis defined by RNA sequencing.

Project description:Arthrofibrosis is an abnormal histopathologic response, is debilitating for patients, and poses a substantial unsolved clinical challenge. This study characterizes molecular biomarkers and regulatory pathways associated with arthrofibrosis by comparing fibrotic and non-fibrotic human knee tissue. The fibrotic group encompasses 4 patients undergoing a revision total knee arthroplasty (TKA) for arthrofibrosis (RTKA-A) while the non-fibrotic group includes 4 patients undergoing primary TKA for osteoarthritis (PTKA) and 4 patients undergoing revision TKA for non-arthrofibrotic and non-infectious etiologies (RTKA-NA). RNA-sequencing of posterior capsule specimens revealed differences in gene expression between each patient group by hierarchical clustering, principal component analysis, and correlation analyses. Multiple differentially expressed genes (DEGs) were defined in RTKA-A versus PTKA patients (i.e., 2059 up-regulated and 1795 down-regulated genes) and RTKA-A versus RTKA-NA patients (i.e., 3255 up-regulated and 3683 down-regulated genes). Our findings define molecular and pathological markers of arthrofibrosis, as well as novel potential targets for risk profiling, early diagnosis and pharmacological treatment of patients.

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Project description:Total knee arthroplasty (TKA) is a durable and reliable procedure to alleviate pain and improve joint function. However, failures related to flexion instability sometimes occur. The goal of this study was to define biological differences between tissues from patients with and without flexion instability of the knee after TKA. Human knee joint capsule tissues were collected at the time of primary or revision TKAs and analyzed by RT-qPCR and RNA-seq, revealing novel patterns of differential gene expression between the two groups. Interestingly, genes related to collagen production and extracellular matrix (ECM) degradation were higher in samples from patients with flexion instability. Partitioned clustering analyses further emphasized differential gene expression patterns between sample types that may help guide clinical interpretations of this complication. Future efforts to disentangle the effects of physical and biological (e.g., transcriptomic modifications) risk factors will aid in further characterizing and avoiding flexion instability after TKA.

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