Dataset Information

Capacitive electrical stimulation effects on osteoblast-released matrix microvesicles

ABSTRACT: Passive implants currently used in the clinics cannot prevent failure rates and inherent revision arthroplasties. Novel bioelectronic devices that include biophysical stimulators (such as electric stimulators) and sensing systems are desired since these will allow for long-term monitoring and control of the bone-implant interface, in a personalized manner. We have developed acting-sensing dual systems operated at high frequency (HF) that are able to stimulate osteoconduction in pre-osteoblasts and osteoinduction in human adipose-derived mesenchymal stem cells (hASCs). The project included – to our knowledge – the first-time proteomic analysis of microvesicles secreted from osteoblasts electrically-stimulated in vitro by a capacitive stimulator of thin interdigitated electrodes delivering an electrical 60 kHz HF stimulation, 30 min/day. Results revealed regulation of osteodifferentiation and mineralization-related proteins (e.g. Tgfb3, Ttyh3, Itih1, Aldh1a1).

INSTRUMENT(S): Q Exactive

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Extracellular Vesicle

SUBMITTER: Bárbara M de Sousa

LAB HEAD: Sandra I. Vieira

PROVIDER: PXD028551 | Pride | 2021-11-29

REPOSITORIES: Pride

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Publications

Capacitive interdigitated system of high osteoinductive/conductive performance for personalized acting-sensing implants.

de Sousa Bárbara M BM Correia Clara R CR Ferreira Jorge A F JAF Mano João F JF Furlani Edward P EP Soares Dos Santos Marco P MP Vieira Sandra I SI

NPJ Regenerative medicine 20211123 1

Replacement orthopedic surgeries are among the most common surgeries worldwide, but clinically used passive implants cannot prevent failure rates and inherent revision arthroplasties. Optimized non-instrumented implants, resorting to preclinically tested bioactive coatings, improve initial osseointegration but lack long-term personalized actuation on the bone-implant interface. Novel bioelectronic devices comprising biophysical stimulators and sensing systems are thus emerging, aiming for long ...[more]

PMID: 34815414

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Project description:In the unicellular cyanobacterium, Synechococcus elongatus PCC 7942, essentially all promoter activities are under the control of the circadian clock in continuous light (LL) conditions. Here, we employed high-density oligonucleotide arrays to explore comprehensive profiles of genome-wide Synechococcus gene expression in wild type, kaiABC-null and kaiC-overexpressor strains under LL and continuous dark (DD) conditions. In the wild type strain more than 30% of transcripts significantly oscillated in a circadian fashion, peaking at subjective dawn and dusk. Such circadian control was nullified in kaiABC-null strains. Although KaiC has been proposed to globally repress gene expression, our analysis revealed that dawn expressing genes were upregulated by kaiC-overexpression, such that the clock was arrested at subjective dawn. Transfer of cells to continuous dark (DD) conditions from LL immediately suppressed expression of most of genes, while the clock keeps time even in the absence of transcriptional feedback. Thus, the Synechococcus genome seems primarily regulated by the light/dark cycles and dramatically modified by the protein-based circadian oscillator. Keywords: timecourse data (~48 hours under continuous light or darkness) from Synechococcus elongatus PCC 7942 (wild type, kaiABC-null, and inducible kaiC-overexpressor) strains Wild type (WT), kaiABC-null (Dkai), and inducible kaiC-overexpressor (oxC) S. elongatus PCC 7942 strains were analyzed under continuous light (LL), continuous dark (DD) using Affymetrix high-density oligonucleotide microarrays (GeneChip CustomExpress Arrays) representing predicted 2,515 protein-coding genes on the genome of Synechococcus elongatus PCC 6301, which can be used also to the almost homologous strain, S. elongatus PCC 7942: Two independent experiments in WT under LL (hours 0 to 52) and DD (hours 0 to 48); Two independent experiments in Dkai under LL (hours 0 to 48); Two independent experiments in oxC under LL in the presence or absence of an inducer, IPTG, from hour 25 to 33 in LL; a single experiment in WT under DD in the presence of an transcriptional inhibitor, rifampicin.

Dataset Information

Capacitive electrical stimulation effects on osteoblast-released matrix microvesicles

Publications

Capacitive interdigitated system of high osteoinductive/conductive performance for personalized acting-sensing implants.

Similar Datasets

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