Establishment of a 3D-dynamic osteoblasts-osteoclasts co-culture model to simulate the jawbone microenvironment in vitro

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• 作者：Letizia Penolazzi ; Andrea Lolli ; Luca Sardelli ; Marco Angelozzi ; Elisabetta Lambertini ; Leonardo Trombelli ; Francesca Ciarpella ; Renata Vecchiatini ; Roberta Piva ; ^{piv@unife.it" class="auth_mail" title="E-mail the corresponding author}
• 关键词：3D cell co-culture ; MRONJ ; Osteoblasts ; Osteoclasts
• 刊名：Life Sciences
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：152
• 期：Complete
• 页码：82-93
• 全文大小：2515 K

文摘

We aimed to establish a 3D osteoblasts/osteoclasts co-culture system requiring limited amounts of human primary cells and useful as platform to 1. recapitulate an “oral bone microenvironment” in healthy or pathological condition, and 2. produce potential implantable cell constructs for regeneration of jawbone which can be negatively affected by bisphosphonates (BPs).

Main methods

Osteoblasts from normal bone chips (hOBs) or from jawbone of patients taking BPs (hnOBs) were co-cultured with monocytes (hMCs) either in static (3D-C) or dynamic (3D-DyC) condition using the RCCS-4™ bioreactor for 3 weeks. Cell aggregates were characterized for viability, histological features and specific osteoclastic and osteogenic markers.

Key findings

In all tested conditions hOBs supported the formation of mature osteoclasts (hOCs), without differentiating agents or exogenous scaffolds. 3D-DyC condition associated with a ground based condition (Xg) rather than modeled microgravity (μXg) produced aggregates with high level of osteogenic markers including Osteopontin (OPN), Osterix (OSX), Runx2 and appreciable bone mineral matrix. hnOBs co-cultured with hMCs in 3D-Dyc/Xg condition generated OPN and mineral matrix positive aggregates.

Significance

We optimized a 3D co-culture system with a limited amount of cells preserving viability and functionality of bone cellular components and generating bone-like aggregates also by using cells from jawbone necrotic tissue. The feasibility to obtain from poor-quality bone sites viable osteoblasts able to form aggregates when co-cultured with hMCs, allows to study the development of autologous implantable constructs to overcome jawbone deficiency in patients affected by MRONJ (Medication-Related Osteonecrosis of the Jaws).