179 EFFECTS OF AN ENDOCANNABINOID, ANANDAMIDE, ON BOVINE BLASTOCYST DEVELOPMENT IN VITRO

2006 ◽  
Vol 18 (2) ◽  
pp. 197
Author(s):  
M. Y. Turco ◽  
K. Matsukawa ◽  
P. Loi ◽  
G. Ptak
Keyword(s):  
Cell Proliferation ◽  
Cell Viability ◽  
Protein Localization ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Tunel Staining ◽  
Santa Cruz ◽  
Negative Effects ◽  
Blastocyst Development ◽  
Development In Vitro

Cannabinoids cause many adverse effects on reproductive functions including fetal loss and pregnancy failure (Paria et al. 1995 PNAS 92, 9460–9464). N-arachidonylethanolamine (anandamide), an endogenous cannabinomimetic lipid derivative, binds with high affinity to brain type and spleen type cannabinoid receptors (CB1-R and CB2-R) and mimics most of the effects of Δ9-tetrahydrocannabinol [(−)THC], a psychoactive derivative of marijuana. In this study, we investigated the effects of anandamide on ovine blastocyst development in vitro. In vitro-matured oocytes were chemically activated and cultured to the blastocyst stage in our standard media (Ptak et al. 1999 Biol. Reprod. 61, 1568–1574). The development rate of blastocysts was 41%. Day 7 blastocysts were exposed to 28 nM anandamide with or without 20 nM SR141716A (an antagonist of CB1-R) for 48 h. In Experiment 1, we examined the CB1-R protein localization on blastocysts by anti CB1-R antibody (Santa Cruz Biotechnology, Inc., Santa Cruz, CA, USA). In Experiment 2, to investigate the possible effect of anandamide on blastocyst development, we used the cell viability assay by propidium iodide, a cell proliferation assay (5-bromo-1′-deoxyuridine incorporation), and the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay (Qbiogene, Inc., Carlsbad, CA, USA). Data were analyzed by one-way ANOVA. CB1-R signals were detected on ovine blastocysts, and these signals were effectively improved in the anandamide co-cultured group. The results of Experiment 2 are summarized in Table 1. Our results demonstrate that CB1-R was expressed in the ovine blastocyst, and anandamide exerts negative effects on in vitro blastocyst development by inhibiting cell proliferation and increasing apoptotic rate, but not cell viability. Furthermore, SR141716A can effectively block the negative effects of anandamide. Table 1. Effect of anandamide (AEA) on sheep blastocyst development assessed by viability, cell proliferation, and TUNEL staining assays

scholarly journals A Safe GDNF and GDNF/BDNF Controlled Delivery System Improves Migration in Human Retinal Pigment Epithelial Cells and Survival in Retinal Ganglion Cells: Potential Usefulness in Degenerative Retinal Pathologies

2021 ◽  
Vol 14 (1) ◽  
pp. 50
Author(s):  
Alicia Arranz-Romera ◽  
Maria Hernandez ◽  
Patricia Checa-Casalengua ◽  
Alfredo Garcia-Layana ◽  
Irene T. Molina-Martinez ◽  
...  
Keyword(s):  
Cell Viability ◽  
Retinal Ganglion Cells ◽  
Neurotrophic Factor ◽  
Retinal Pigment Epithelial ◽  
Ganglion Cells ◽  
Retinal Pigment ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Retinal Ganglion ◽  
Pigment Epithelial

We assessed the sustained delivery effect of poly (lactic-co-glycolic) acid (PLGA)/vitamin E (VitE) microspheres (MSs) loaded with glial cell-derived neurotrophic factor (GDNF) alone (GDNF-MSs) or combined with brain-derived neurotrophic factor (BDNF; GDNF/BDNF-MSs) on migration of the human adult retinal pigment epithelial cell-line-19 (ARPE-19) cells, primate choroidal endothelial (RF/6A) cells, and the survival of isolated mouse retinal ganglion cells (RGCs). The morphology of the MSs, particle size, and encapsulation efficiencies of the active substances were evaluated. In vitro release, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cell viability, terminal deoxynucleotidyl transferase (TdT) deoxyuridine dUTP nick-end labelling (TUNEL) apoptosis, functional wound healing migration (ARPE-19; migration), and (RF/6A; angiogenesis) assays were conducted. The safety of MS intravitreal injection was assessed using hematoxylin and eosin, neuronal nuclei (NeuN) immunolabeling, and TUNEL assays, and RGC in vitro survival was analyzed. MSs delivered GDNF and co-delivered GDNF/BDNF in a sustained manner over 77 days. The BDNF/GDNF combination increased RPE cell migration, whereas no effect was observed on RF/6A. MSs did not alter cell viability, apoptosis was absent in vitro, and RGCs survived in vitro for seven weeks. In mice, retinal toxicity and apoptosis was absent in histologic sections. This delivery strategy could be useful as a potential co-therapy in retinal degenerations and glaucoma, in line with future personalized long-term intravitreal treatment as different amounts (doses) of microparticles can be administered according to patients’ needs.

scholarly journals The Olive Leaves Extract Has Anti-Tumor Effects against Neuroblastoma through Inhibition of Cell Proliferation and Induction of Apoptosis

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2178
Author(s):  
Fabio Morandi ◽  
Veronica Bensa ◽  
Enzo Calarco ◽  
Fabio Pastorino ◽  
Patrizia Perri ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Proliferation ◽  
Cell Viability ◽  
Cell Cycle Progression ◽  
Treatment Strategies ◽  
Annexin V ◽  
Dependent Manner ◽  
Induction Of Apoptosis ◽  
Dose Dependent

Neuroblastoma (NB) is the most common extra-cranial solid tumor of pediatric age. The prognosis for high-risk NB patients remains poor, and new treatment strategies are desirable. The olive leaf extract (OLE) is constituted by phenolic compounds, whose health beneficial effects were reported. Here, the anti-tumor effects of OLE were investigated in vitro on a panel of NB cell lines in terms of (i) reduction of cell viability; (ii) inhibition of cell proliferation through cell cycle arrest; (iii) induction of apoptosis; and (iv) inhibition of cell migration. Furthermore, cytotoxicity experiments, by combining OLE with the chemotherapeutic topotecan, were also performed. OLE reduced the cell viability of NB cells in a time- and dose-dependent manner in 2D and 3D models. NB cells exposed to OLE underwent inhibition of cell proliferation, which was characterized by an arrest of the cell cycle progression in G0/G1 phase and by the accumulation of cells in the sub-G0 phase, which is peculiar of apoptotic death. This was confirmed by a dose-dependent increase of Annexin V+ cells (peculiar of apoptosis) and upregulation of caspases 3 and 7 protein levels. Moreover, OLE inhibited the migration of NB cells. Finally, the anti-tumor efficacy of the chemotherapeutic topotecan, in terms of cell viability reduction, was greatly enhanced by its combination with OLE. In conclusion, OLE has anti-tumor activity against NB by inhibiting cell proliferation and migration and by inducing apoptosis.

Increased cell death in osteopontin-deficient cardiac fibroblasts occurs by a caspase-3-independent pathway

2004 ◽  
Vol 287 (4) ◽  
pp. H1730-H1739 ◽  
Author(s):  
Ron Zohar ◽  
Baoqian Zhu ◽  
Peter Liu ◽  
Jaro Sodek ◽  
C. A. McCulloch
Keyword(s):  
Cell Death ◽  
Caspase 3 ◽  
Cardiac Fibroblasts ◽  
Chromatin Condensation ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Tunel Staining ◽  
Wild Type ◽  
Nuclear Fragmentation ◽  
A Cell

Reperfusion-induced oxidative injury to the myocardium promotes activation and proliferation of cardiac fibroblasts and repair by scar formation. Osteopontin (OPN) is a proinflammatory cytokine that is upregulated after reperfusion. To determine whether OPN enhances fibroblast survival after exposure to oxidants, cardiac fibroblasts from wild-type (WT) or OPN-null (OPN−/−) mice were treated in vitro with H2O2to model reperfusion injury. Within 1 h, membrane permeability to propidium iodide (PI) was increased from 5 to 60% in OPN−/−cells but was increased to only 20% in WT cells. In contrast, after 1–8 h of treatment with H2O2, the percent of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL)-stained cells was more than twofold higher in WT than OPN−/−cells. Electron microscopy of WT cells treated with H2O2showed chromatin condensation, nuclear fragmentation, and cytoplasmic and nuclear shrinkage, which are consistent with apoptosis. In contrast, H2O2-treated OPN−/−cardiac fibroblasts exhibited cell and nuclear swelling and membrane disruption that are indicative of cell necrosis. Treatment of OPN−/−and WT cells with a cell-permeable caspase-3 inhibitor reduced the percentage of TUNEL staining by more than fourfold in WT cells but decreased staining in OPN−/−cells by ∼30%. Although the percentage of PI-permeable WT cells was reduced threefold, the percent of PI-permeable OPN−/−cells was not altered. Restoration of OPN expression in OPN−/−fibroblasts reduced the percentage of PI-permeable cells but not TUNEL staining after H2O2treatment. Thus H2O2-induced cell death in OPN-deficient cardiac fibroblasts is mediated by a caspase-3-independent, necrotic pathway. We suggest that the increased expression of OPN in the myocardium after reperfusion may promote fibrosis by protecting cardiac fibroblasts from cell death.

scholarly journals MiR-144-3p Aggravated Cartilage Injury in Rheumatoid Arthritis by Regulating BMP2/PI3K/Akt Axis

2021 ◽  
Author(s):  
Mei-Li Mo ◽  
Jin-Mei Jiang ◽  
Xiao-Ping Long ◽  
Li-Hu Xie
Keyword(s):  
Extracellular Matrix ◽  
Cell Viability ◽  
Cell Injury ◽  
Tissue Injury ◽  
Cartilage Injury ◽  
Luciferase Assay ◽  
Tunel Staining ◽  
Western Blots

Abstract Objectives Present study aimed to illustrate the role of miR-144-3p in RA. Methods N1511 chondrocytes were stimulated by IL-1β to mimic RA injury model in vitro. Rats were subjected to injection of type II collagen to establish an in vivo RA model and the arthritis index score was calculated. Cell viability was determined by CCK-8. The expression of cartilage extracellular matrix proteins (Collagen II and Aggrecan) and matrix metalloproteinases protein (MMP-13) were determined by qRT-PCR and western blots. Cell apoptosis was measured by Flow cytometry. ELISA was applied to test the secretion of pro-inflammatory cytokines (IL-1β and TNF-α). Tissue injury and apoptosis were detected by HE staining and TUNEL staining. Interaction of miR-144-3p and BMP2 was verified by dual luciferase assay. Results MiR-144-3p was dramatically increased in IL-1β induced N1511 cells. MiR-144-3p depletion elevated cell viability, suppressed apoptosis, pro-inflammatory cytokine releasing, and extracellular matrix loss in IL-1β induced N1511 cells. Moreover, miR-144-3p targeted BMP2 to modulate its expression negatively. Activation of PI3K/Akt signaling compromised inhibition of BMP2 induced aggravated N1511 cell injury with IL-1β stimulation. Inhibition of miR-144-3p alleviated cartilage injury and inflammatory in RA rats. Conclusion Collectively, miR-144-3p could aggravate chondrocytes injury inflammatory response in RA via BMP2/PI3K/Akt axis.

Micromolar concentration of pentoxifylline improves development in vitro of hamster 8-cell embryos: conrmation of biological viability by embryo transfer

1997 ◽  
Vol 9 (7) ◽  
pp. 697 ◽  
Author(s):  
Rupasri Ain ◽  
P. B. Seshagiri
Keyword(s):  
Embryo Transfer ◽  
Embryo Development ◽  
Human Sperm ◽  
Blastocyst Development ◽  
Preimplantation Embryo Development ◽  
Embryo Culture Medium ◽  
Cell Embryo ◽  
Continuous Presence ◽  
Development In Vitro

The inßuence of the sperm motility stimulant pentoxifylline (PF) on preimplantation embryo development in hamsters was evaluated. Eight-cell embryos were cultured in hamster embryo culture medium (HECM)-2, with or without PF (0· 0233·6 mM). There was 90%, 37% and 29% inhibition of blastocyst development by 3·6 (used for human sperm), 0·9 and 0 ·45 mM PF, respectively. However, 23 µM PF (exposed to hamster oocytes during IVF) signicantly (P < 0·05) improved blastocyst development (63· 6% v. 51· 8%); morulae development was, however, not curtailed by 0·45 mM or 0·9 mM PF (51·8%±6·0 or 50·5%±11·3, respectively). Post-implantation viability of PF-treated embryos was assessed by embryo transfer; 43% of 80 PF-treated embryos implanted compared with 40% of 79 control embryos. Of the 9 recipients, 6 females delivered pups (19, i.e. 16% of transferred embryos or 53% of implanted embryos). These data show that in hamsters, continuous presence of PF at 0·45-3·6 mM is detrimental to 8-cell embryo development whereas 23 µM PF improves the development of embryos to viable blastocysts which produce live offspring.

75 EFFECT OF PHENAZINE ETHOSULFATE ON PORCINE BLASTOCYST DEVELOPMENT, APOPTOSIS, AND CRYOTOLERANCE AFTER OPEN PULLED STRAW VITRIFICATION

2008 ◽  
Vol 20 (1) ◽  
pp. 118
Author(s):  
B. Gajda ◽  
Z. Smorag ◽  
M. Bryla
Keyword(s):  
Cell Number ◽  
Developmental Competence ◽  
Control Group ◽  
Tunel Staining ◽  
Bovine Embryos ◽  
Blastocyst Development ◽  
Morula Stage ◽  
Phenazine Ethosulfate ◽  
And Control

It is possible to improve the success of cryopreservation of in vitro-produced bovine embryos by modifying the embryos with the metabolic regulator phenazine ethosulfate (PES) (Seidel 2006 Theriogenology 65, 228–235). The PES treatment increased glucose matabolism, tended to increase the pentose phosphate pathway flux of glucose, and clearly reduced accumulation of lipids in cultured bovine embryos (De La Torre-Sanchez et al. 2006 Reprod. Fertil. Dev. 18, 597–607). It is known that porcine embryos have a considerably high content of lipids, and the success rates of their cryopreservation appear to be highly correlated with cytoplasmic lipid content. In our preliminary study, we observed that supplementation of NCSU-23 medium with PES has a positive effect on efficiency of pig blastocysts of good quality (Gajda et al.. 2007 Acta Biochim. Pol. 54(Suppl 1), 52 abst). In the present study, the effects of PES on pig blastocyst development, apoptosis, and survival after vitrification were investigated. In Exp. 1, porcine zygotes obtained from superovulated gilts were cultured in NCSU-23 medium supplemented with 0 (control), 0.025, 0.05, or 0.075 µm PES. The culture was performed at 39�C, with 5% CO2 in air, for 96–120 h. Embryo quality criteria were developmental competence (cleavage, morula stage, and blastocyst stage), cell number per blastocyst, and the degree of apoptosis as assessed by TUNEL staining. In Exp. 2, expanded blastocysts cultured with 0.025 µm PES were vitrified in a ethylene glycol and dimethyl sulfoxide mixture using open pulled straw (OPS) technology (Vajta et al. 1997 Acta Vet. Scand. 38, 349–352). After thawing, the blastocysts were cultured in vitro for re-expansion or transferred to synchronized recipients. Data were analyzed by chi-square test. There was a difference between the 0.025 µm PES-treated and the control group in percentage of cleaved embryos (99.0 and 91.4%, respectively; P < 0.05), between all experimental groups and control in percentage of morula stage (90.7, 87.8, 83.8, and 80.0%, respectively), and between 0.025 and 0.05 µm PES-treated and control in percentage of blastocyst rates (70.0, 75.5, and 65.7%, respectively). The number of cells and percentage of TUNEL-positive nuclei per blastocyst were lower in the PES-treated than in the control group. The survival rate of blastocysts after vitrification and thawing was enhanced in the presence of PES compared to that in the PES-free group (45.2 and 38.9%, respectively; P < 0.05). After transfer of 56 expanded blastocysts cultured with PES and vitrified into 3 recipients, two gilts were confirmed pregnant at 35 days of gestation. In conclusion, a higher blastocyst percentage with a low incidence of apoptosis was obtained in the presence of PES compared to control. These blastocysts also had an increased ability to survive cryopreservation.

197 DOES DURATION OF BOVINE OOCYTE MATURATION IN VITRO AFFECT THE SPEED OF EMBRYO DEVELOPMENT IN VITRO AND SEX RATIO AT THE TWO-CELL OR BLASTOCYST STAGE?

2008 ◽  
Vol 20 (1) ◽  
pp. 177
Author(s):  
P. Bermejo-Álvarez ◽  
A. Gutiérrez-Adán ◽  
P. Lonergan ◽  
D. Rizos
Keyword(s):  
Sex Ratio ◽  
Embryo Development ◽  
Blastocyst Stage ◽  
Early Embryo ◽  
Blastocyst Development ◽  
Maturation In Vitro ◽  
Maturational Stage ◽  
Development In Vitro ◽  
Oviduct Fluid

The faster-developing blastocysts in IVC systems are generally considered more viable and better able to survive following cryopreservation or embryo transfer than those that develop more slowly. However, evidence from several species indicates that embryos that reach the blastocyst stage earliest are more likely to be males than females. The aim of this study was to determine whether the duration of maturation could affect early embryo development and, furthermore, the sex ratio of early- or late-cleaved embryos and blastocysts. Cumulus–oocyte complexes were matured in vitro for 16 h (n = 2198) or 24 h (n = 2204). Following IVF, presumptive zygotes from each group were examined every 4 h between 24 and 48 h postinsemination (hpi) for cleavage, and all embryos were cultured to Day 8 in synthetic oviduct fluid to assess blastocyst development. Two-cell embryos at each time point and blastocysts on Days 6, 7, and 8 from both groups were snap-frozen individually for sexing. Sexing was performed with a single PCR using a specific primer BRY. There was a significantly lower number of cleaved embryos from the 16-h compared with the 24-h maturation group at 28 (10.0 � 1.51 v. 28.8 � 3.57%), 32 (35.3 � 1.48 v. 57.6 � 3.33%), 36 (54.8 � 1.76 v. 67.4 � 2.81%), 40 (63.3 � 1.82 v. 72.0 � 2.54%), and 48 (70.6 � 1.78 v. 77.1 � 2.18%) hpi, respectively (mean � SEM; P d 0.05). However, the blastocyst yields on Day 6 (17.1 � 3.11 v. 16.4 � 2.11%), 7 (30.6 � 4.10 v. 34.6 � 3.51%), or 8 (34.1 � 3.90 v. 39.4 � 4.26%) were similar for both groups (mean � SEM; 16 v. 24 h, respectively). Significantly more 2-cell early cleaved embryos (up to 32 hpi) were male compared with the expected 1:1 ratio from both groups (16 h: 1.24:0.76 v. 24 h: 1.17:0.83, P ≤ 0.05); however, the overall sex ratio among 2-cell embryos was significantly different from the expected 1:1 in favor of males only for the 16-h group (1.18:0.82, P ≤ 0.05). The sex ratio of blastocysts on Day 6, 7, or 8 from both groups was not different from the expected 1:1. However, the total number of male blastocysts obtained after 8 days of culture from the 24-h group was significantly different from the expected 1:1 (1.19:0.81, P ≤ 0.05) and approached significance in the 16-h group. These results show that the maturational stage of the oocyte at the time of fertilization has an effect on the kinetics of early cleavage divisions but not on blastocyst yield. Furthermore, irrespective of the duration of maturation, the sex ratio of early-cleaving 2-cell embryos was weighted in favor of males, and this observation was maintained at the blastocyst stage.

scholarly journals SDF-1α/MicroRNA-134 Axis Regulates Nonfunctioning Pituitary Neuroendocrine Tumor Growth via Targeting VEGFA

2020 ◽  
Vol 11 ◽  
Author(s):  
Xiaoyu Wang ◽  
Yuanjian Fang ◽  
Yunxiang Zhou ◽  
Xiaoming Guo ◽  
Ke Xu ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Proliferation ◽  
Cell Viability ◽  
Neuroendocrine Tumor ◽  
Tumor Cells ◽  
Tumor Invasion ◽  
Expression Level ◽  
Qrt Pcr ◽  
Proliferation And Invasion

BackgroundNonfunctioning pituitary neuroendocrine tumor (NF-PitNET) is difficult to resect. Except for surgery, there is no effective treatment for NF-PitNET. MicroRNA-134 (miR-134) has been reported to inhibit proliferation and invasion ability of tumor cells. Herein, the mechanism underlying the effect of miR-134 on alleviating NF-PitNET tumor cells growth is explored.MethodsMouse pituitary αT3-1 cells were transfected with miR-134 mimics and inhibitor, followed by treatment with stromal cell-derived factor-1α (SDF-1α) in vitro. MiR-134 expression level: we used quantitative real-time PCR (qRT-PCR) to detect the expression of miR-134. Cell behavior level: cell viability and invasion ability were assessed using a cell counting kit-8 (CCK8) assay and Transwell invasion assay respectively. Cytomolecular level: tumor cell proliferation was evaluated by Ki-67 staining; propidium iodide (PI) staining analyzed the effect of miR-134 on cell cycle arrest; western blot analysis and immunofluorescence staining evaluated tumor migration and invasive ability. Additionally, we collected 27 NF-PitNET tumor specimens and related clinical data. The specimens were subjected to qRT-PCR to obtain the relative miR-134 expression level of each specimen; linear regression analysis was used to analyze the miR-134 expression level in tumor specimens and the age of the NF-PitNET population, gender, tumor invasion, prognosis, and other indicators.ResultsIn vitro experiment, miR-134 was observed to significantly inhibit αT3-1 cells proliferation characterized by inhibited cell viability and expressions of vascular endothelial growth factor A (VEGFA) and cell cycle transition from G1 to S phase (P &lt; 0.01). VEGFA was verified as a target of miR-134. Additionally, miR-134-induced inhibition of αT3-1 cell proliferation and invasion was attenuated by SDF-1α and VEGFA overexpression (P &lt; 0.01). In primary NF-PitNET tumor analysis, miR-134 expression level was negatively correlated with tumor invasion (P = 0.003).ConclusionThe regulation of the SDF-1α/miR-134/VEGFA axis represents a novel mechanism in the pathogenesis of NF-PitNETs and may serve as a potential therapeutic target for the treatment of NF-PitNETs.

scholarly journals The Effect of Parietin Isolated From Rheum ribes L on In Vitro Wound Model Using Human Dermal Fibroblast Cells

2019 ◽  
Vol 18 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Gulsah Gundogdu ◽  
Koksal Gundogdu ◽  
Kemal Alp Nalci ◽  
Alper Kursat Demirkaya ◽  
Seymanur Yılmaz Tascı ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Cell Viability ◽  
Dermal Fibroblast ◽  
Dose Range ◽  
Human Dermal Fibroblast ◽  
Fibroblast Cells ◽  
Wound Model ◽  
Dpph Method ◽  
Pipette Tip

Parietin is one of the well-known anthraquinone compounds that can be extracted from Rheum ribes L. In this study, we aimed to investigate the effects of parietin isolated from Rheum ribes L on an in vitro wound model using human dermal fibroblast cells and compare its effectiveness against zinc. The antioxidant effect of parietin was determined by using the 1,1-diphenyl-2-picrylhydrazine (DPPH) method. Human dermal fibroblast cells were cultured in proculture medium and were kept until 100% confluence was achieved. The wound model was created by using a pipette tip. After that, different concentrations of parietin and zinc (final concentrations in the well to be 5-250 µM and 25-200 µM, respectively) were added into the medium. The proliferation-inducing effect on cell viability was determined by using MTT assay. Images of cells were taken at 0, 12, and 24 hours. According to the DPPH method, parietin exhibited have antioxidant activity. According to the MTT results, parietin exhibited significant proliferation-inducing effect on cell viability in a dose range of 5 to 10 M, and zinc showed significant proliferation-inducing effect on cell viability at dose 50 µM ( P < .05). In addition, the image of cell proliferation was also shown at the same doses at 24 hours. In this study, we claim that parietin induces cell proliferation at low doses in cases of dermal fibroblast loss. In conclusion, parietin as an alternative to zinc in wound healing could be used by clinicians in the future with more extensive studies.

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