In vitro-generated human muscle reserve cells are heterogeneous for Pax7 with distinct molecular states and metabolic profiles.

Background: The capacity of skeletal muscles to regenerate relies on Pax7 muscle stem cells (MuSC). While in vitro-amplified MuSC are activated and lose part of their regenerative capacity, in vitro-generated human muscle reserve cells (MuRC) are very similar to quiescent MuSC with properties required for their use in cell-based therapies.

Methods: In the present study, we investigated the heterogeneity of human MuRC and characterized their molecular signature and metabolic profile.

Osteoarticular Infections Approached through the Prism of the Pediatric Orthopedist.

Nowadays, () is considered as the main bacterial cause of osteoarticular infections (OAI) in children aged less than 48 months. Next to classical acute hematogenous osteomyelitis and septic arthritis, invasive infections can also give rise to atypical osteoarticular infections, such as cellulitis, pyomyositis, bursitis, or tendon sheath infections. Clinically, OAI are usually characterized by a mild clinical presentation and by a modest biologic inflammatory response to infection.

Primary Pyomyositis Caused by Kingella kingae in a 21-Month-old Infant: A Case Report.

The authors report a rare case of an unusual primary pyomyositis of the biceps cruralis assigned to Kingella kingae in a 21-month-old girl. The reported case demonstrated that primary pyomyositis may be encountered during invasive infection due to K. kingae even if this manifestation remains rare.

A single dose of tranexamic acid reduces blood loss after reverse and anatomic shoulder arthroplasty: a randomized controlled trial.

Background: Hematoma formation and the need for blood transfusions are commonly reported complications after shoulder arthroplasty. Tranexamic acid (TXA) has been widely used in hip and knee arthroplasty to decrease perioperative blood loss. The role of TXA is still being established in shoulder arthroplasty.

[Therapeutic approaches for proximal humerus fractures].

Proximal humerus fracture (PHF) is the 3rd most common fracture over age 65, and its incidence increases with age. The combination of an aging population and a high incidence in geriatric patients constitute a serious potential public health concern. The treatment of PHF is debated.