Moldable Alginate/Hydroxyapatite Hydrogel Loaded with Metformin Enhanced Regeneration of the Rabbit Mandibular Defects.

Background: Moldable hydrogel-based techniques loaded with osteoinductive agents such as metformin have become a promising field for reconstructing critical-sized bone defects, particularly in those with irregular shapes. Here, we used metformin incorporated in an alginate/hydroxyapatite hydrogel to accelerate the repair of the rabbit critical-sized mandibular defect.

Methods: Cytotoxicity and osteoinduction of the metformin-loaded alginate/hydroxyapatite hydrogel were evaluated by culturing the osteosarcoma cell line (MG63).

The Effects of Thymoquinone Loaded in Alginate Scaffold on Bone Regeneration in Rabbit Mandible Defect.

Background: Thymoquinone (TQ) has some beneficial roles in bone repair. Local administration of the drugs by loading them into a scaffold leads to releasing higher concentrations of a drug in the appropriate position. This study was conducted to evaluate the effects of the local administration of TQ loaded in an alginate scaffold on bone regeneration in rabbit mandibular defect.

Does coenzyme Q10 supplementation protect spermatogenesis in ciprofloxacin-induced rat testes?

Objective: Ciprofloxacin (CPFX) is frequently prescribed by fertility specialists and urologists to manage infections in male reproductive organs. However, it is toxic to the testicles and can lead to infertility. Dietary antioxidants are known to protect the testis from damage.

Plasticity Comparison of Two Stem Cell Sources with Different Hox Gene Expression Profiles in Response to Cobalt Chloride Treatment during Chondrogenic Differentiation.

The limited self-repair capacity of articular cartilage is a challenge for healing injuries. While mesenchymal stem/stromal cells (MSCs) are a promising approach for tissue regeneration, the criteria for selecting a suitable cell source remain undefined. To propose a molecular criterion, dental pulp stem cells (DPSCs) with a -negative expression pattern and bone marrow mesenchymal stromal cells (BMSCs), which actively express genes, were differentiated towards chondrocytes in 3D pellets, employing a two-step protocol.

The effects of Wharton's jelly MSCs secretomes for restoring busulfan-induced reproductive toxicity in male mice.

Several studies investigated the application of Mesenchymal stem cells (MSCs) for treating spermatogenic disorders. Considering the limitation of MSC application, the present study aimed to compare Wharton's jelly MSCs secretomes, including condition medium (CM) 10-fold concentrated (CM10), 20-fold concentrated CM (CM20), and extracellular vesicles (EVs) to restore busulfan-induced damage on male mice reproduction. So, Wharton's jelly MSCs were cultured, CM was collected, and EVs were isolated.

Enhancing chondrogenic differentiation of mesenchymal stem cells through synergistic effects of cellulose nanocrystals and plastic compression in collagen-based hydrogel for cartilage formation.

Collagen-based (COL) hydrogels could be a promising treatment option for injuries to the articular cartilage (AC) becuase of their similarity to AC native extra extracellular matrix. However, the high hydration of COL hydrogels poses challenges for AC's mechanical properties. To address this, we developed a hydrogel platform that incorporating cellulose nanocrystals (CNCs) within COL and followed by plastic compression (PC) procedure to expel the excessive fluid out.

Reconstructing Critical-Sized Mandibular Defects in a Rabbit Model: Enhancing Angiogenesis and Facilitating Bone Regeneration via a Cell-Loaded 3D-Printed Hydrogel-Ceramic Scaffold Application.

In this study, we propose a spatially patterned 3D-printed nanohydroxyapatite (nHA)/beta-tricalcium phosphate (β-TCP)/collagen composite scaffold incorporating human dental pulp-derived mesenchymal stem cells (hDP-MSCs) for bone regeneration in critical-sized defects. We investigated angiogenesis and osteogenesis in a rabbit critical-sized mandibular defect model treated with this engineered construct. The critical and synergistic role of collagen coating and incorporation of stem cells in the regeneration process was confirmed by including a cell-free uncoated 3D-printed nHA/β-TCP scaffold, a stem cell-loaded 3D-printed nHA/β-TCP scaffold, and a cell-free collagen-coated 3D-printed nHA/β-TCP scaffold in the experimental design, in addition to an empty defect.

Effect of Pre-Incubation of Cryopreserved Sperm with either Kisspeptin or Glutathione to Mitigate Freeze-Thaw Damage.

Background: Sperm cryopreservation reduces sperm quality. Kisspeptin (KP) has beneficial effects on sperm functions. This study compares the effect of KP and Glutathione (GSH) on mitigating the detrimental effects of the freeze-thaw cycle on sperm.

L-Carnitine and Pentoxifylline Supplementation Improves Sperm Viability and Motility at Low Temperature.

Background: In infertility clinics, preserving high-quality spermatozoa for a long time is a necessity. Pentoxifylline (PT) and L-carnitine (LC) are effective in improving sperm motility as well as protecting the sperm membrane. The present study aimed to investigate the protective impacts of PT and LC on the quality of the normal sperm motility, protamine content, and viability on prolonged storage for 12 days at 4-6°C.

Accelerating effect of Shilajit on osteogenic property of adipose-derived mesenchymal stem cells (ASCs).

Background: Shilajit has been widely used remedy for treating a numerous of illness such as bone defects in Iran traditional folk medicine since hundreds of years ago. The aim of the present study was to explore the effect of Shilajit on the osteogenic differentiation of human adipose-derived mesenchymal stem cells (ASCs) in two- (2D) and three-dimensional (3D) cultures.

Materials And Methods: ASCs were seeded in 3D 1% alginate (Alg) hydrogel with or without Shilajit (500 µg/mL) and compared with 2D cultures.

Optimizing artificial meniscus by mechanical stimulation of the chondrocyte-laden acellular meniscus using ad hoc bioreactor.

Background: Tissue engineering focuses on reconstructing the damaged meniscus by mimicking the native meniscus. The application of mechanical loading on chondrocyte-laden decellularized whole meniscus is providing the natural microenvironment. The goal of this study was to evaluate the effects of dynamic compression and shear load on chondrocyte-laden decellularized meniscus.

Three-dimensional in vitro maturation of rabbit oocytes enriched with sheep decellularized greater omentum.

Background: To prevent ovarian hyperstimulation syndrome, in vitro maturation (IVM) allows the oocytes for infertility treatment without hormone therapy. Although many oocytes matured during IVM, some deficiencies in the culture conditions lead to inhibition of the growth and development of the cumulus cells and the oocyte nuclear and cytoplasmic maturation.

Objectives: The challenge of improving the oocyte culture conditions prompted us to use greater omentum (GOM), full of growth factors and proteins, as a rich supplement to the base culture medium.

Engineered artificial articular cartilage made of decellularized extracellular matrix by mechanical and IGF-1 stimulation.

Cartilage engineering has the potential to overcome clinical deficiency in joint disorders. Decellularized extracellular matrix (dECM) has great biocompatibility and bioactivity and can be considered an appropriate natural scaffold for tissue engineering applications. Both insulin-like growth factor-1 (IGF-1) and mechanical compression stimulate the production of cartilage ECM, modulate mechanical properties, and gene expression.

Effects of kisspeptin incubation on the mature mouse testicular sperms quality: An experimental study.

Background: Sperm quality has an important role in the success of assisted reproductive techniques, by adding some bioactive agents with a positive impact on sperms, it can be improved.

Objective: This study aimed to evaluate the effects of kisspeptin on the sperm motility criteria, Lactate dehydrogenase-C (LDHC) activity, acrosomal reaction, and capacitation in the mouse testicular sperm in vitro.

Materials And Methods: Sperm samples were extracted from testes of 96 male Balb/C mice weighing 25-30 gr, aged 6-8 wk.

Quality Comparison of Decellularized Omentum Prepared by Different Protocols for Tissue Engineering Applications.

Objective: Decellularized greater omentum (GOM) is a good extracellular matrix (ECM) source for regenerative medicine applications. The aim of the current study was to compare the efficiency of three protocols for sheep GOM decellularization based on sufficient DNA depletion and ECM content retention for tissue engineering application.

Materials And Methods: In this experimental study, in the first protocol, low concentrations of sodium dodecyl sulfate (SDS 1%), hexane, acetone, ethylenediaminetetraacetic acid (EDTA), and ethanol were used.

Attenuation of osteoarthritis progression through intra-articular injection of a combination of synovial membrane-derived MSCs (SMMSCs), platelet-rich plasma (PRP) and conditioned medium (secretome).

Purpose: Osteoarthritis (OA) as a progressive destructive disease of articular cartilage is the most common joint disease characterized by reduction of joint cartilage thickness, demolition of cartilage surface and new bone formation. To overcome these problems, the purpose of the current research was to evaluate and compare the in vivo effects of synovial membrane-derived mesenchymal stem cell (SMMSCs), platelet-rich plasma (PRP) and conditioned medium (secretome) on collagenase II-induced rat knee osteoarthritis (KOA) remedy.

Methods: For the first step, SMMSCs were isolated and characterized.

Prednisolone and mesenchymal stem cell preloading protect liver cell migration and mitigate extracellular matrix modification in transplanted decellularized rat liver.

Introduction: Regenerative medicine provides promising approaches for treating chronic liver diseases. Previous studies indicate that decellularized liver architecture is damaged by invading non-hepatic inflammatory cells. This study aimed to use anti-inflammatory and regenerative potency of bone marrow-derived mesenchymal stem cells (BM-MSC) and prednisolone for reducing fibrosis and balancing inflammatory cell migration into the decellularized liver scaffold.

Synergistic impact of platelet rich plasma-heparin sulfate with hydroxyapatite/zirconia on the osteoblast differentiation potential of adipose-derived mesenchymal stem cells.

3D porous hydroxyapatite (HA) has been reinforced by zirconia (ZrO) coating and impregnation with a combination of platelet rich plasma (PRP) as a source of growth factors (GFs) and Heparin sulfate (HS) to sustain the release of GFs. Adipose mesenchymal stem cells (ADMSCs) were characterized by flow cytometry for CD (cluster of differentiation) 44, CD105, CD106, CD34 and CD144, along with checking the multipotency by differentiation into the adipocytes and osteoblasts. Then, they were cultured on the scaffold treated with and without osteogenic media on days 7, 14 and 21.

The decellularized ovary as a potential scaffold for maturation of preantral ovarian follicles of prepubertal mice.

GAG: glycosaminoglycan; ECM: extracellular matrix; 2D: two-dimensional; E2: estradiol; P4: progesterone; BMP15: bone morphogenetic protein 15; GDF9: growth differentiation factor 9; : zona pellucida 2; : growth/differentiation factor-9; : bone morphogenetic protein 6; : bone morphogenetic protein 15.

Thymoquinone loading into hydroxyapatite/alginate scaffolds accelerated the osteogenic differentiation of the mesenchymal stem cells.

Background: Phytochemical agents such as thymoquinone (TQ) have osteogenic property. This study aimed to investigate the synergic impact of TQ and hydroxyapatite on mesenchymal stem cell differentiation. Alginate was also used as drug vehicle.

Histochemical Study of the Rat Uterine Glycoconjugate Alteration following Treatment with Exogenous Gonadotropic Hormones during the Implantation Period.

One of the female causes of infertility is anovulation which is treatable with gonadotropin hormones. These hormones affect the molecular organization of the uterus such as glycoconjugates that are the first site of contact between the blastocyst and the uterus. The objective of this project was to study the alteration of glycoconjugates on the uterine apical, Golgi zone, and basement membrane of epithelial cells and the uterine gland after hyperstimulation with pregnant mare serum gonadotropin (PMSG) (4, 8, 16, 24, and 40 IU), during the implantation period.