Recently, a large spectrum of biomaterials emerged, with emphasis on various pure, blended, or doped calcium phosphates (CaPs). Although basic cytocompatibility testing protocols are referred by International Organization for Standardization (ISO) 10993 (parts 1–22), rigorous in vitro testing using cutting-edge technologies should be carried out in order to fully understand the behavior of various biomaterials (whether in bulk or low-dimensional object form) and to better gauge their outcome when implanted. In this review, current molecular techniques are assessed for the in-depth characterization of angiogenic potential, osteogenic capability, and the modulation of oxidative stress and inflammation properties of CaPs and their cation- and/or anion-substituted derivatives. Using such techniques, mechanisms of action of these compounds can be deciphered, highlighting the signaling pathway activation, cross-talk, and modulation by microRNA expression, which in turn can safely pave the road toward a better filtering of the truly functional, application-ready innovative therapeutic bioceramic-based solutions.

In vitro tumor spheroids have proven to be useful 3D tumor culture models for drug testing, and determining the molecular mechanism of tumor progression and cellular interactions. Therefore, there is a continuous search for their industrial scalability and routine preparation. Considering that hydrogels are promising systems that can favor the formation of tumor spheroids, our study aimed to investigate and develop less expensive and easy-to-use amorphous and crosslinked hydrogels, based on natural compounds such as sodium alginate (NaAlg), aloe vera (AV) gel powder, and chitosan (CS) for tumor spheroid formation. The ability of the developed hydrogels to be a potential spheroid-forming system was evaluated using MDA-MB-231 and U87MG cancer cells. Spheroid abilities were influenced by pH, viscosity, and crosslinking of the hydrogel. Addition of either AV or chitosan to sodium alginate increased the viscosity at pH 5, resulting in amorphous hydrogels with a strong gel texture, as shown by rheologic analysis. Only the chitosan-based gel allowed formation of spheroids at pH 5. Among the variants of AV-based amorphous hydrogels tested, only hydrogels at pH 12 and with low viscosity promoted the formation of spheroids. The crosslinked NaAlg/AV, NaAlg/AV/glucose, and NaAlg/CS hydrogel variants favored more efficient spheroid formation. Additional studies would be needed to use AV in other physical forms and other formulations of hydrogels, as the current study is an initiation, in evaluating the potential use of AV gel in tumor spheroid formation systems.

Background/Objectives: To evaluate how the surgical technique and type of implanted intraocular lens influence the postoperative visual acuity and complications in ectopia lentis associated to Marfan syndrome patients. Materials and Methods: The medical records and videos of ectopia lentis surgeries in patients (children and adults) with Marfan syndrome, were retrospectively reviewed and compared. The study included 33 eyes that underwent four different intraocular lens implantation (IOL) techniques: IOL in conjunction with a simple capsular tension ring, IOL in conjunction with a Cionni modified capsular tension ring (m-CTR), two-point scleral IOL fixation and IOL with one haptic in the bag and one haptic sutured to the sclera. Results: Vision significantly improved from a mean preoperative visual acuity of 0.1122 to a mean postoperative visual acuity of 0.4539 in both age groups (p < 0.0001), with no difference in the primary outcome between children and adults. The most common surgical technique used in both age groups was IOL in conjunction with an m-CTR. There was only one major postoperative complication requiring additional surgery. Conclusions: Zonular weakness mainly influenced by age was the most important selection criterion for the surgical approach. Regardless of the technique employed, the postoperative visual acuity was improved in both adults and children.

(1) Background: Intralenticular tumors are an entity akin to Schrodinger’s cat since, although the human crystalline cells themselves are not known to malignly proliferate, various entities can take the appearance and clinical presentation of a tumor originating in the lens. We present the peculiar case of an 11-year-old male patient of African descent, HLA B27+, with a previous history of minor ocular trauma and unilateral anterior uveitis a year before which was admitted to our department with total opacification of the crystalline lens in the right eye and lens neovascularization. During surgery, a vascular, white fibrotic mass measuring 0.1–0.2 cm was discovered inside the lens bag and was excised. (2) Methods: Retrospective case review. (3) Results: The histopathological exam of the excised mass revealed an abundant infiltrate consisting of CD68+ foamy macrophages and lymphoplasmacytic elements. CD68 is a pan-macrophage marker associated with an active inflammatory mechanism soliciting macrophages, and tissue activated macrophages are correlated to increased stromal and serum levels of vascular endothelial growth factor, providing an explanation for lens angiogenesis. (4) Conclusions: The diagnosis is of a “masquerade tumor” resulted from an abnormal inflammatory process in connection with previous ocular trauma and possibly the patient’s HLA B27+ status.

CD36 is a transmembrane protein that plays a role in various biological processes, including oxidized low-density lipoprotein and fatty acid uptake as well as regulatory control for inflammation signaling. Its robust expression in monocytes and macrophages associated with its ability to translocate fatty acids linked this scavenger receptor to foam cell formation and atherosclerosis. In the context of ischemic stroke, CD36 has been shown to contribute to brain injury and inflammation. Preclinical studies have demonstrated that CD36 expression increases in the brain after stroke and that inhibiting CD36 can reduce infarction size and improve neurological outcomes in animal models. These findings suggest that CD36 may be a potential therapeutic target for ischemic stroke. However, no clinical trials addressing CD36 and acute ischemic stroke are registered in the American or European databases. This review will discuss the relationship between CD36 and ischemic stroke and present some clinical findings in patients with single nucleotide polymorphisms of the CD36 gene.

Background:Most data related to high-grade glioma and glioblastoma (GBM) 3D models refer to ultra-low/suspension cultivation systems, for several reasons: easy to initiate, high penetrability of treatments, ease of harvesting for downstream analysis. However, the major limitation of these models is the absence of the extracellular matrix, which enables the specific, local invasiveness of these aggressive brain tumors.Aim:This study provides a comparison between ultra-low and several extracellular matrix (ECM) and hydrogel culture conditions for various grades of patient-derived glioma organoids, in terms of cell growth, invasiveness, and release of cytokines/chemokines, as a model for downstream analysis of soluble factors.Materials and Methods:Patient-derived glioma organoids were initiated in three different conditions: ultra-low attachment(UL), 3D Matrigel, and dextran-based hydrogels. Human endothelial cells were used for tube assay co-cultures and human normal monocyte cell line SC to assess monocyte invasion and interaction with tumor organoids.Results:UL conditions supported organoid formation with better growth rate and easy passaging, and reliable detection of secreted cytokines and chemokines, closely mirroring qualitative secretory profiles observed in tumor explants. In contrast, ECM-based systems enabled invasive growth patterns and co-culture assays, but with a restricted immune cell infiltration and with a reduced detectable level of soluble factors. While qualitative cytokine signatures were preserved across culture platforms, substantial quantitative differences were observed, highlighting the influence of matrix composition on measurable outputs. Preliminary data showed that organoid-forming capacity indicated no clear association with Isocitrate Dehydrogenase 1 (IDH1) mutational status in the tested samples.Conclusion:Our findings indicate that UL and ECM-based models provide complementary information and recommend a dual-platform cell culture initiation strategy to maximize robustness and translational relevance in patient-derived glioma research.