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1.
Development ; 149(4)2022 02 15.
Artigo em Inglês | MEDLINE | ID: mdl-35029672

RESUMO

The submergence-induced hypoxic condition negatively affects the plant growth and development, and causes early onset of senescence. Hypoxia alters the expression of a number of microRNAs (miRNAs). However, the molecular function of submergence stress-induced miRNAs in physiological or developmental changes and recovery remains poorly understood. Here, we show that miR775 is an Arabidopsis thaliana-specific young and unique miRNA that possibly evolved non-canonically. miR775 post-transcriptionally regulates GALACTOSYLTRANSFERASE 9 (GALT9) and their expression is inversely affected at 24 h of complete submergence stress. The overexpression of miR775 (miR775-Oe) confers enhanced recovery from submergence stress and reduced accumulation of RBOHD and ROS, in contrast to wild-type and MIM775 Arabidopsis shoot. A similar recovery phenotype in the galt9 mutant indicates the role of the miR775-GALT9 module in post-submergence recovery. We predicted that Golgi-localized GALT9 is potentially involved in protein glycosylation. The altered expression of senescence-associated genes (SAG12, SAG29 and ORE1), ethylene signalling (EIN2 and EIN3) and abscisic acid (ABA) biosynthesis (NCED3) pathway genes occurs in miR775-Oe, galt9 and MIM775 plants. Thus, our results indicate the role for the miR775-GALT9 module in post-submergence recovery through a crosstalk between the ethylene signalling and ABA biosynthesis pathways.


Assuntos
Proteínas de Arabidopsis/metabolismo , Arabidopsis/metabolismo , Etilenos/farmacologia , Galactosiltransferases/metabolismo , MicroRNAs/metabolismo , Senescência Vegetal/efeitos dos fármacos , Ácido Abscísico/metabolismo , Arabidopsis/genética , Arabidopsis/crescimento & desenvolvimento , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/genética , Sítios de Ligação , Cisteína Endopeptidases/genética , Cisteína Endopeptidases/metabolismo , Dioxigenases/genética , Dioxigenases/metabolismo , Galactosiltransferases/genética , Complexo de Golgi/metabolismo , MicroRNAs/química , MicroRNAs/genética , NADPH Oxidases/genética , NADPH Oxidases/metabolismo , Folhas de Planta/genética , Folhas de Planta/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Plantas Geneticamente Modificadas/genética , Plantas Geneticamente Modificadas/crescimento & desenvolvimento , Plantas Geneticamente Modificadas/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Receptores de Superfície Celular/genética , Receptores de Superfície Celular/metabolismo , Transdução de Sinais/genética , Estresse Fisiológico
2.
Development ; 148(1)2021 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-33168582

RESUMO

Root system architecture and anatomy of monocotyledonous maize is significantly different from dicotyledonous model Arabidopsis The molecular role of non-coding RNA (ncRNA) is poorly understood in maize root development. Here, we address the role of LEAFBLADELESS1 (LBL1), a component of maize trans-acting short-interfering RNA (ta-siRNA), in maize root development. We report that root growth, anatomical patterning, and the number of lateral roots (LRs), monocot-specific crown roots (CRs) and seminal roots (SRs) are significantly affected in lbl1-rgd1 mutant, which is defective in production of ta-siRNA, including tasiR-ARF that targets AUXIN RESPONSE FACTOR3 (ARF3) in maize. Altered accumulation and distribution of auxin, due to differential expression of auxin biosynthesis and transporter genes, created an imbalance in auxin signalling. Altered expression of microRNA165/166 (miR165/166) and its targets, ROLLED1 and ROLLED2 (RLD1/2), contributed to the changes in lbl1-rgd1 root growth and vascular patterning, as was evident by the altered root phenotype of Rld1-O semi-dominant mutant. Thus, LBL1/ta-siRNA module regulates root development, possibly by affecting auxin distribution and signalling, in crosstalk with miR165/166-RLD1/2 module. We further show that ZmLBL1 and its Arabidopsis homologue AtSGS3 proteins are functionally conserved.


Assuntos
Sequência Conservada , MicroRNAs/metabolismo , Proteínas de Plantas/metabolismo , Raízes de Plantas/embriologia , Raízes de Plantas/genética , RNA Interferente Pequeno/metabolismo , Arabidopsis/genética , Vias Biossintéticas , Padronização Corporal/genética , Contagem de Células , Divisão Celular , Regulação da Expressão Gênica de Plantas , Genes de Plantas , Ácidos Indolacéticos/metabolismo , MicroRNAs/genética , Modelos Biológicos , Mutação/genética , Especificidade de Órgãos/genética , Fenótipo , Proteínas de Plantas/genética , Feixe Vascular de Plantas/embriologia , Feixe Vascular de Plantas/genética , Regulação para Cima/genética , Zea mays
3.
Nutr Health ; 29(1): 25-29, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35912504

RESUMO

Background: The diet is a major factor affecting the Body Mass Index (BMI) of an individual. BMI has long been the standard for measuring health and its normal range (18.5-24.9, according to the World Health Organization) is considered to be crucial for maintenance of proper health and to prevent various lifestyle disorders which are considered to have either direct or indirect effects on physical and mental well-being of our youth. Aim: To investigate the correlation between diet patterns and BMI, overall stamina and fatigue levels in the youth population residing in Delhi-NCR region of India. Methods: An online survey was conducted using a carefully designed Google form and the respondents were asked to give details about the basic health parameters and dietary lifestyle. Results: 67% of the respondents who consumed milk were found to have an ideal BMI. 64% of the respondents who consumed mustard oil as their predominant dietary fat showed normal BMI and more than 80% showed lower fatigue levels. Conclusion: Milk and mustard oil consumption is important for maintenance of an ideal BMI. Awareness should be created in the youth to have them as part of their daily diet.


Assuntos
Dieta , Leite , Humanos , Adolescente , Animais , Índice de Massa Corporal , Óleos de Plantas
4.
Plant J ; 101(1): 87-100, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31483536

RESUMO

Auxin signaling mediated by various auxin/indole-3-acetic acid (Aux/IAAs) and AUXIN RESPONSE FACTORs (ARFs) regulate lateral root (LR) development by controlling the expression of downstream genes. LATERAL ROOT PRIMORDIUM1 (LRP1), a member of the SHORT INTERNODES/STYLISH (SHI/STY) family, was identified as an auxin-inducible gene. The precise developmental role and molecular regulation of LRP1 in root development remain to be understood. Here we show that LRP1 is expressed in all stages of LR development, besides the primary root. The expression of LRP1 is regulated by histone deacetylation in an auxin-dependent manner. Our genetic interaction studies showed that LRP1 acts downstream of auxin responsive Aux/IAAs-ARFs modules during LR development. We showed that auxin-mediated induction of LRP1 is lost in emerging LRs of slr-1 and arf7arf19 mutants roots. NPA treatment studies showed that LRP1 acts after LR founder cell specification and asymmetric division during LR development. Overexpression of LRP1 (LRP1 OE) showed an increased number of LR primordia (LRP) at stages I, IV and V, resulting in reduced emerged LR density, which suggests that it is involved in LRP development. Interestingly, LRP1-induced expression of YUC4, which is involved in auxin biosynthesis, contributes to the increased accumulation of endogenous auxin in LRP1 OE roots. LRP1 interacts with SHI, STY1, SRS3, SRS6 and SRS7 proteins of the SHI/STY family, indicating their possible redundant role during root development. Our results suggested that auxin and histone deacetylation affect LRP1 expression and it acts downstream of LR forming auxin response modules to negatively regulate LRP development by modulating auxin homeostasis in Arabidopsis thaliana.


Assuntos
Proteínas de Arabidopsis/metabolismo , Arabidopsis/crescimento & desenvolvimento , Arabidopsis/metabolismo , Ácidos Indolacéticos/metabolismo , Arabidopsis/genética , Proteínas de Arabidopsis/genética , Epigênese Genética/genética , Epigênese Genética/fisiologia , Regulação da Expressão Gênica de Plantas/genética , Regulação da Expressão Gênica de Plantas/fisiologia , Mutação/genética , Raízes de Plantas/genética , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo , Transdução de Sinais/genética , Transdução de Sinais/fisiologia
5.
Indian J Med Res ; 154(1): 51-61, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34782530

RESUMO

Background & objectives: In the current scenario, with availability of different surgical procedures for limbal stem cell deficiency (LSCD), there exists no common consensus as to the standardization of the management protocol for the same. In addition, there also exists diversity in the views about the clinical diagnosis, ancillary investigations and clinical parameters. The objective of the present study was to evaluate the reported outcomes of surgical interventions for the management of LSCD. Methods: A systematic review of published literature on limbal stem cell transplantation (LSCT) was performed using Ovid Medline, Embase and PubMed for a duration of 2009 to 2019. Original studies including prospective, retrospective case series and randomized controlled trials, articles in English language, articles with access to full text and studies with more than or at least 10 patients were included in this review. Data related to clinical and visual outcomes were evaluated, and pool estimates of different surgeries were calculated using random-effects model and individually using Pearson's Chi-square test. Results: A total of 1133 abstracts were evaluated. Finally, 17 studies were included for the analysis. Among these 17 studies, direct limbal lenticule transplantation was performed in five studies, of which autologous tissue from the fellow eye [conjunctival limbal autograft (CLAU)], allograft from a cadaver/live donor [keratolimbal allograft (KLAL)/conjunctival limbal allograft (CLAL)] and combination of CLAU plus KLAL were done in one, three and one studies, respectively. The ex vivo expanded cultivated limbal epithelial transplantation (CLET) was reported in six studies and simple limbal epithelial transplantation (SLET) in four studies. Two were comparative studies comparing CLET and CLAL (living-related CLAL) with cadaveric KLAL, respectively. Outcome analysis of the included studies showed significant heterogeneity. Calculated pool rate for various types of surgeries was calculated. The pool estimate for CLAL was 67.56 per cent [95% confidence interval (CI), 41.75-93.36; I2=83.5%, P=0.002]. For KLAL, this value was 63.65 per cent (95% CI, 31.38-95.91; I2=92.4%, P=0.000). Pool estimate for CLET was 78.90 per cent (95% CI, 70.51-87.28; I2=73.6%, P=0.001). Corresponding values for SLET were 79.08 per cent (95% CI, 74.10-84.07; I2=0.0%, P=0.619). CLAU and combination of CLAU plus KLAL were done in one study each; hence, statistical analysis could not be done. The functional outcome in terms of gain in visual acuity post-operatively was better in KLAL (P<0.005) and SLET group as compared to CLET group. Interpretation & conclusions: The present analysis suggests that though the anatomical success rates were almost identical between SLET, CLET, CLAL, and KLAL procedures, the functional success rates were better following KLAL and SLET procedures as compared to CLET. Decision for LSCT for cases of ocular burns based on either clinical judgement of the surgeon or individual diagnosis remains a suitable option.


Assuntos
Doenças da Córnea , Limbo da Córnea , Doenças da Córnea/cirurgia , Humanos , Limbo da Córnea/cirurgia , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos Retrospectivos , Transplante de Células-Tronco , Células-Tronco , Transplante Autólogo
6.
J Exp Bot ; 71(3): 778-792, 2020 01 23.
Artigo em Inglês | MEDLINE | ID: mdl-31793642

RESUMO

In higher plants, pluripotent stem cells reside in the specialized microenvironment called stem cell niches (SCNs) harbored at the shoot apical meristem (SAM) and root apical meristem (RAM), which give rise to the aerial and underground parts of a plant, respectively. The model plant Arabidopsis thaliana (Arabidopsis) has been extensively studied to decipher the intricate regulatory mechanisms involving some key transcriptions factors and phytohormones that play pivotal roles in stem cell homeostasis, meristem maintenance, and organ formation. However, there is increasing evidence to show the epigenetic regulation of the chromatin architecture, gene expression exerting an influence on an innate balance between the self-renewal of stem cells, and differentiation of the progeny cells to a specific tissue type or organ. Post-translational histone modifications, ATP-dependent chromatin remodeling, and chromatin assembly/disassembly are some of the key features involved in the modulation of chromatin architecture. Here, we discuss the major epigenetic regulators and illustrate their roles in the regulation of stem cell activity, meristem maintenance, and related organ patterning in Arabidopsis.


Assuntos
Arabidopsis/crescimento & desenvolvimento , Montagem e Desmontagem da Cromatina , Meristema/fisiologia , Nicho de Células-Tronco/fisiologia , Proteínas de Arabidopsis/metabolismo , Redes Reguladoras de Genes , Proteínas de Homeodomínio/metabolismo , Proteínas de Plantas/metabolismo
7.
Natl Med J India ; 32(1): 9-12, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31823931

RESUMO

Background: We aimed to assess the knowledge and attitude of health professionals towards eye donation at an apex tertiary care centre of northern India. Methods: We interviewed 600 health professionals, comprising doctors, nurses, medical as well as nursing students, social workers and allied paramedical staff. A structured questionnaire (12 questions for assessing knowledge and 5 questions for assessing attitude) was used to estimate the awareness of eye donation and willingness to pledge eyes for donation. The responses pertaining to knowledge were graded as 'excellent', 'good' and 'poor' and those pertaining to attitude were grouped into 'positive' and 'negative'. Results: Of the 600 participants, 138 participants (23%) had 'excellent' knowledge and 234 participants (39%) had 'good' knowledge about eye donation. Awareness of eye donation was positively related to the level of literacy (odds ratio [OR] 8.5 [2.30-31.2]; p<0.001). Medical social workers and health supervisors had better knowledge about eye donation (OR 2.01 [1.08-3.72]; p=0.026) than other professional groups. Knowledge of eye donation had no significant association with age, gender, religion, family type and marital status of the respondent. Willingness to pledge eyes for donation was observed in only 6% of the participating health professionals. Pledging of eyes for donation was higher among older participants (OR 7.8 [2.67-22.77]; p<0.001). Conclusion: Our study shows that there is sufficient knowledge about eye donation, but an alarmingly low willingness to pledge eyes for donation among health professionals. Concerted efforts are required to alter their attitude to strengthen the Hospital Cornea Retrieval Programme.


Assuntos
Olho/transplante , Conhecimentos, Atitudes e Prática em Saúde , Pessoal de Saúde/psicologia , Doadores de Tecidos/psicologia , Obtenção de Tecidos e Órgãos , Adolescente , Adulto , Fatores Etários , Cegueira/etiologia , Cegueira/cirurgia , Opacidade da Córnea/complicações , Opacidade da Córnea/cirurgia , Feminino , Pessoal de Saúde/estatística & dados numéricos , Humanos , Índia , Masculino , Pessoa de Meia-Idade , Fatores Sexuais , Inquéritos e Questionários/estatística & dados numéricos , Centros de Atenção Terciária/estatística & dados numéricos , Doadores de Tecidos/estatística & dados numéricos , Adulto Jovem
8.
Int Ophthalmol ; 39(3): 667-669, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29423782

RESUMO

PURPOSE: To discuss the clinical features, differential diagnosis and the novel confocal microscopic findings noted in the rare 'deep blue dot corneal degeneration'. METHODS: Observational case report. RESULTS: Slit-lamp biomicroscopic examination revealed bilateral, numerous, circular to oval discrete blue opacities at the level of deep stroma and fine grey linear opacities at the level of mid to deep stroma. Confocal microscopy demonstrated two types of corresponding hyper-reflective extracellular lesions: oval deposit-like, most concentrated at a depth of 430-480 µ and needle-like at the depth 330-370 µ. CONCLUSIONS: Deep blue dot corneal degeneration is a rare entity where blue deposits of amyloid are seen in the deep corneal stroma. It should be considered as a differential diagnosis when an old-aged person presents with good vision and the above mentioned findings.


Assuntos
Distrofias Hereditárias da Córnea/diagnóstico , Substância Própria/diagnóstico por imagem , Microscopia Confocal/métodos , Diagnóstico Diferencial , Humanos , Masculino , Pessoa de Meia-Idade
9.
Planta ; 248(3): 545-558, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29968061

RESUMO

MAIN CONCLUSION: Present review addresses the advances made in the understanding of biogenesis of plant small RNAs and their role in plant development. We discuss the elaborate role of microRNAs (miRNAs) and trans-acting small interfering RNAs (ta-siRNAs) in various aspects of plant growth and development and highlight relevance of small RNA mobility. Small non-coding RNAs regulate various aspects of plant development. Small RNAs (sRNAs) of 21-24 nucleotide length are derived from double-stranded RNAs through the combined activity of several biogenesis and processing components. These sRNAs function by negatively regulating the expression of target genes. miRNAs and ta-siRNAs constitute two important classes of endogenous small RNAs in plants, which play important roles in plant growth and developmental processes like embryogenesis, organ formation and patterning, shoot and root growth, and reproductive development. Biogenesis of miRNAs is a multistep process which includes transcription, processing and modification, and their loading onto RNA-induced silencing complex (RISC). RISC-loaded miRNAs carry out post-transcriptional silencing of their target(s). Recent studies identified orthologues of different biogenesis components of novel and conserved small RNAs from different model plants. Although many small RNAs have been identified from diverse plant species, only a handful of them have been functionally characterized. In this review, we discuss the advances made in understanding the biogenesis, functional conservation/divergence in miRNA-mediated gene regulation, and the developmental role of small RNAs in different plant species.


Assuntos
Desenvolvimento Vegetal , RNA de Plantas/metabolismo , Pequeno RNA não Traduzido/metabolismo , Flores/crescimento & desenvolvimento , Regulação da Expressão Gênica de Plantas , Germinação , Meristema/crescimento & desenvolvimento , Desenvolvimento Vegetal/genética , Folhas de Planta/crescimento & desenvolvimento , Raízes de Plantas/crescimento & desenvolvimento , Brotos de Planta/crescimento & desenvolvimento , Plantas/genética , Plantas/metabolismo , Sementes/crescimento & desenvolvimento
10.
Genomics ; 103(1): 114-21, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24275521

RESUMO

Similar to the majority of the microRNAs, mature miR166s are derived from multiple members of MIR166 genes (precursors) and regulate various aspects of plant development by negatively regulating their target genes (Class III HD-ZIP). The evolutionary conservation or functional diversification of miRNA166 family members remains elusive. Here, we show the phylogenetic relationships among MIR166 precursor and mature sequences from three diverse model plant species. Despite strong conservation, some mature miR166 sequences, such as ppt-miR166m, have undergone sequence variation. Critical sequence variation in ppt-miR166m has led to functional diversification, as it targets non-HD-ZIPIII gene transcript (s). MIR166 precursor sequences have diverged in a lineage specific manner, and both precursors and mature osa-miR166i/j are highly conserved. Interestingly, polycistronic MIR166s were present in Physcomitrella and Oryza but not in Arabidopsis. The nature of cis-regulatory motifs on the upstream promoter sequences of MIR166 genes indicates their possible contribution to the functional variation observed among miR166 species.


Assuntos
MicroRNAs/genética , Filogenia , RNA de Plantas/genética , Sequência de Aminoácidos , Arabidopsis/genética , Bryopsida/genética , Sequência Conservada , DNA de Plantas/genética , Evolução Molecular , Variação Genética , Dados de Sequência Molecular , Oryza/genética , Regiões Promotoras Genéticas , Alinhamento de Sequência , Análise de Sequência de RNA
11.
Plant Cell Rep ; 33(6): 945-53, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24504657

RESUMO

Overexpression of miR166/165 down-regulates target HD - ZIP IIIs and promotes root growth by enhancing cell division and meristematic activity, whereas overexpression of HD - ZIP IIIs inhibits root growth in Arabidopsis thaliana. Post-embryonic growth of higher plants is maintained by active meristems harbouring undifferentiated cells. Shoot and root apical meristems (SAM and RAM) utilize both similar and distinct signalling mechanisms for their maintenance in Arabidopsis thaliana. An important regulatory role in this context has the interaction of microRNAs with their target mRNAs, mostly encoding transcription factors. One class of microRNA166/165 (miR166/165) has been implicated in the maintenance of SAM and vascular patterning. Here, we show that miR166/165 plays an important role in root growth also by negatively regulating its target transcripts, HD-ZIP IIIs, in the RAM. While overexpression of miR166 promotes RAM activity, overexpression of its targets reduces RAM activity. These results reveal a conserved role of miR166/165 in the maintenance of SAM and RAM activity in A. thaliana.


Assuntos
Proteínas de Arabidopsis/genética , Arabidopsis/genética , Regulação da Expressão Gênica de Plantas , MicroRNAs/genética , Arabidopsis/crescimento & desenvolvimento , Proteínas de Arabidopsis/metabolismo , Expressão Gênica , Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/metabolismo , Zíper de Leucina , Meristema/genética , Meristema/crescimento & desenvolvimento , Mutação , Raízes de Plantas/genética , Raízes de Plantas/crescimento & desenvolvimento , Plantas Geneticamente Modificadas , RNA Mensageiro/genética , RNA de Plantas/genética
12.
Int J Biol Macromol ; 274(Pt 2): 133447, 2024 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-38944073

RESUMO

Electrospun nanofibers exhibit a significant potential in the synthesis of nanostructured materials, thereby offering a promising avenue for enhancing the efficacy of wound care. The present study aimed to investigate the wound-healing potential of two biomacromolecules, PCL-Gelatin nanofiber adhered with bone marrow-derived mesenchymal stem cells (BMSCs). Characterisation of the nanofiber revealed a mean fiber diameter ranging from 200 to 300 nm, with distinctive elemental peaks corresponding to polycaprolactone (PCL) and gelatin. Additionally, BMSCs derived from bone marrow were integrated into nanofibers, and their wound-regenerative potential was systematically evaluated through both in-vitro and in-vivo methodologies. In-vitro assessments substantiated that BMSC-incorporated nanofibers enhanced cell viability and crucial cellular processes such as adhesion, and proliferation. Subsequently, in-vivo studies were performed to demonstrate the wound-healing efficacy of nanofibers. It was observed that the rate of wound healing of BMSCs incorporated nanofibers surpassed both, nanofiber and BMSCs alone. Furthermore, histomorphological analysis revealed accelerated re-epithelization and improved wound contraction in BMSCs incorporated nanofiber group. The fabricated nanofiber incorporated with BMSCs exhibited superior wound regeneration in animal model and may be utilised as a wound healing patch.

13.
Am J Reprod Immunol ; 91(5): e13853, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38706383

RESUMO

BACKGROUND: The amniotic membrane (AM) has shown immense potential in repairing wounds due to its great regenerative qualities. Although the role of AM as a biological scaffold in repairing wounds has been studied well, the tissue regenerative potential of AM-derived mesenchymal stem cells (MSCs) and conditioned media (CM) derived from it remains to be discovered as of now. Here, we examined the wound healing abilities of fresh and frozen thawed rabbit AM (rAM) along with the MSCs and their lyophilised CM in rabbits challenged with skin wounds. METHODS: To elucidate the role of rAM-MSCs and its CM in repairing the wound, we isolated it from the freshly derived placenta and characterised their differentiation potential by performing an in vitro tri-lineage differentiation assay besides other standard confirmations. We compared the wound repair capacities of rAM-MSCs and lyophilised CM with the fresh and cryopreserved AM at different timelines by applying them to excision wounds created in rabbits. RESULTS: By monitoring wound contractions and tissue histology of wounded skin at different time points after the application, we observed that rAM-MSCs and rAM-MSC-derived CM significantly promoted wound closure compared to the control group. We also observed that the wound closure capacity of rAM-MSCs and rAM-MSC-derived CM is as efficient as fresh and cryopreserved rAM. CONCLUSION: Our findings suggest that rAM-MSCs and rAM-MSC derived CM can be effectively used to treat skin wounds in animals and correctly delivered to the damaged tissue using AM as a bioscaffold, either fresh or frozen.


Assuntos
Âmnio , Células-Tronco Mesenquimais , Cicatrização , Animais , Coelhos , Feminino , Células-Tronco Mesenquimais/citologia , Diferenciação Celular , Meios de Cultivo Condicionados/farmacologia , Transplante de Células-Tronco Mesenquimais/métodos , Pele/lesões , Pele/patologia , Gravidez , Modelos Animais de Doenças , Células Cultivadas , Transplante Homólogo
14.
Nanomaterials (Basel) ; 12(12)2022 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-35745438

RESUMO

In a hydroponic system, potassium chloroaurate (KAuCl4) triggers the in vitro sucrose (Suc)-dependent formation of gold nanoparticles (AuNPs). AuNPs stimulate the growth of the root system, but their molecular mechanism has not been deciphered. The root system of Arabidopsis (Arabidopsis thaliana) exhibits developmental plasticity in response to the availability of various nutrients, Suc, and auxin. Here, we showed the roles of Suc, phosphorus (P), and nitrogen (N) in facilitating a AuNPs-mediated increase in root growth. Furthermore, the recuperating effects of KAuCl4 on the natural (IAA) auxin-mediated perturbation of the root system were demonstrated. Arabidopsis seedlings harboring the cell division marker CycB1;1::CDB-GUS provided evidence of the restoration efficacy of KAuCl4 on the IAA-mediated inhibitory effect on meristematic cell proliferation of the primary and lateral roots. Arabidopsis harboring synthetic auxin DR5rev::GFP exhibited a reinstating effect of KAuCl4 on IAA-mediated aberration in auxin subcellular localization in the root. KAuCl4 also exerted significant and differential recuperating effects on the IAA-mediated altered expression of the genes involved in auxin signaling and biosynthetic pathways in roots. Our results highlight the crosstalk between KAuCl4-mediated improved root growth and Suc and nutrient-dependent auxin homeostasis in Arabidopsis.

15.
Sci Rep ; 10(1): 6163, 2020 Apr 06.
Artigo em Inglês | MEDLINE | ID: mdl-32249798

RESUMO

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

16.
Ocul Surf ; 17(4): 747-752, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31276830

RESUMO

PURPOSE: Evaluate role of Strip Meniscometry (SMT) and lower tear meniscus [height (LTMH) & depth (LTMD)] in diagnosis of Dry Eye Disease (DED) and its comparison with TBUT. METHODS: In a prospective observational cross-sectional study of 120 eyes [60 eyes of 30 DED (Group 1) & 60 eyes of 30 controls (Group 2)] TBUT, Schirmer's, SMT, LTMH and LTMD was done. Subjects >18 years diagnosed with DED (aqueous deficient) as per Tear film and Ocular surface society-Dry Eye Workshop (TFOS DEWS) II protocol and Ocular surface disease Index (OSDI) questionnaire, with no associated systemic risk factor and previous ocular medical/surgical treatment were included as cases and subjects with no history of ocular surface disease as controls. The data was analyzed using t-test & receiver operating characteristic curve. RESULTS: TBUT & Schirmer's values were significantly lower in group 1 (p < 0.05). SMT was 2.28 ±â€¯1.28 (Range 0-6) & 8.11 ±â€¯1.39 (Range 3-10) in group 1 & 2 respectively (p < 0.05). LTMH was 169.32 ±â€¯29.84 µm (Range 85.78-209.11) and 234.41 ±â€¯19.51 µm (Range 203.89-289.53) in Group 1 & 2 respectively (p < 0.05). LTMD was 144.32 ±â€¯33.60 µm (Range 57.49-190.12) and 206.69 ±â€¯14.17 µm (Range 187.12-251.50) in Group 1 & 2 respectively (p < 0.05). The SMT, LTMH and LTMD showed a cutoff value of < 5 mm (AUC 0.994, sensitivity 96.7%, specificity 96.7%), 204.96 µm (AUC 0.998, sensitivity 98.3%, specificity 96.7%) & 190 µm (AUC 0.995, sensitivity 96.7%, specificity 95%) respectively. CONCLUSION: SMT, ASOCT, LTMD & LTMH are useful non invasive diagnostic tests for DED comparable with TBUT.


Assuntos
Síndromes do Olho Seco/diagnóstico , Lágrimas/química , Tomografia de Coerência Óptica/métodos , Adolescente , Adulto , Estudos Transversais , Síndromes do Olho Seco/metabolismo , Seguimentos , Humanos , Índia , Pessoa de Meia-Idade , Estudos Prospectivos , Reprodutibilidade dos Testes , Adulto Jovem
17.
Methods Mol Biol ; 1933: 89-98, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30945180

RESUMO

Laser capture microdissection (LCM) is a tool to isolate desired and/or less accessible cells or tissues from a heterogeneous population. In the current method, we describe an efficient and cost-effective method to obtain both high-quality mRNA and miRNAs in sufficient quantity from LCM-derived plant tissues. The quality of the isolated RNA can be assessed using Bioanalyzer. Using modified stem-loop RT-PCR, we confirmed the presence of 21-24 nucleotide (nt) long mature miRNAs. This modified LCM-based method has been found to be suitable for the tissue-specific expression analysis of both genes and small RNAs (miRNAs).


Assuntos
Genes de Plantas/genética , Microdissecção e Captura a Laser/métodos , MicroRNAs/genética , RNA Longo não Codificante/genética , RNA Mensageiro/genética , RNA de Plantas/genética , RNA de Plantas/isolamento & purificação , Zea mays/genética , Biologia Computacional/métodos , Regulação da Expressão Gênica de Plantas , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Transcriptoma , Zea mays/crescimento & desenvolvimento
18.
3 Biotech ; 9(5): 193, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31065493

RESUMO

The functional characterization of miRNAs often involves understanding of their spatiotemporal expression, which mostly relies on reporter-based or in situ hybridization studies. The available in situ localization methods follow separate protocols for pre-hybridization, hybridization, post-hybridization, and detection steps for both miRNA and mRNA transcripts in plants. In this study, we present a single method which can be used for whole mount in situ localization of both miRNAs and mRNAs in different plant tissues. Our modified method provides enhanced sensitivity for the localization of miRNA and their target transcripts. Consequently, a less laborious, time-saving, economic and efficient method has been proposed by the modification of pre-hybridization, hybridization, post-hybridization and detection steps.

19.
Exp Clin Transplant ; 17(6): 844-848, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31324138

RESUMO

Patients with gelatinous drop-like corneal dystrophy need to be effectively managed as the disease is severely debilitating in view of associated pho-tophobia and glare. Here, we report a rare case of gelatinous drop-like corneal dystrophy effectively managed by intraoperative anterior segment optical coherence tomography-guided manual deep anterior lamellar keratoplasty in 1 eye and sutureless fibrin glue-aided, microkeratome-assisted automated lamellar therapeutic keratoplasty in the other eye. The patient, a 22-year old man, presented with gradual diminution of vision associated with foreign body sensation, glare, photophobia, and watering due to corneal lesions, which were consistent with a diagnosis of gelatinous drop-like corneal dystrophy. Visual acuity at pre-sentation was 4/60 and 3/60 in the right and left eye, respectively. The patient received customized component lamellar keratoplasty in both eyes, and host tissue was sent for histopathologic examination. Treatment resulted in a best-corrected distance visual acuity of 6/9 and 6/12 in the right and left eye, respectively. The graft was clear and well apposed, with minimal interface haze bilaterally. The histopathologic report suggested intralamellar amyloid deposition in the form of homogenous, acellular eosinophilic deposits in the epithelium and anterior corneal stroma. This is a first report of the exclusive use of a fibrin-aprotinin tissue adhesive to stabilize a donor corneal lamellar graft as a treatment modality for a patient with gelatinous drop-like corneal dystrophy, suggesting that this treatment could supplant the need for sutures.


Assuntos
Amiloidose Familiar/cirurgia , Aprotinina/uso terapêutico , Córnea/cirurgia , Distrofias Hereditárias da Córnea/cirurgia , Transplante de Córnea , Adesivo Tecidual de Fibrina/uso terapêutico , Procedimentos Cirúrgicos sem Sutura , Amiloidose Familiar/diagnóstico por imagem , Amiloidose Familiar/patologia , Amiloidose Familiar/fisiopatologia , Córnea/diagnóstico por imagem , Córnea/patologia , Córnea/fisiopatologia , Distrofias Hereditárias da Córnea/diagnóstico por imagem , Distrofias Hereditárias da Córnea/patologia , Distrofias Hereditárias da Córnea/fisiopatologia , Humanos , Masculino , Recuperação de Função Fisiológica , Tomografia de Coerência Óptica , Resultado do Tratamento , Acuidade Visual , Adulto Jovem
20.
BMJ Case Rep ; 11(1)2018 Dec 03.
Artigo em Inglês | MEDLINE | ID: mdl-30567159

RESUMO

Implantable collamer lenses (ICL) have gained popularity for correction of myopia where kerato-refractive procedures are not indicated as in cases of high myopic refractive errors. Toxic anterior segment syndrome (TASS) is a very uncommonly reported postoperative complication following ICL implantation. A young patient developed severe corneal oedema and anterior segment inflammation on the first day after ICL implantation. Analysing retrospectively, possible idiosyncratic response to intracameral pilocarpine was considered as a cause for TASS. Prompt and intensive therapy with oral and topical potent steroids was visually rewarding. TASS, though a sterile inflammation can have catastrophic sequelae such as corneal decompensation and secondary glaucoma. Hence, timely identification and management is important.


Assuntos
Segmento Anterior do Olho , Endoftalmite/diagnóstico , Implante de Lente Intraocular/efeitos adversos , Miopia/cirurgia , Lentes Intraoculares Fácicas/efeitos adversos , Adulto , Diagnóstico Diferencial , Endoftalmite/diagnóstico por imagem , Endoftalmite/tratamento farmacológico , Feminino , Fluprednisolona/administração & dosagem , Fluprednisolona/análogos & derivados , Fluprednisolona/uso terapêutico , Glucocorticoides/administração & dosagem , Glucocorticoides/uso terapêutico , Humanos , Soluções Oftálmicas/administração & dosagem , Soluções Oftálmicas/uso terapêutico , Complicações Pós-Operatórias
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