Cytological Aberrations Research Articles

Assessment of Bio-physiological damages and cytological aberrations in cowpea varieties treated with gamma rays and sodium azide.

The assessment of mutagen induced biological damage forms an important study in determining the mutagenic potency and genotypic sensitivity, a vital aspect in mutation breeding programs. A prior assessment of lethal dose (LD50), mutagen induced biological damage (alterations in bio-physiological traits and frequency of cytological aberrations) is a prerequisite for determining an optimum mutagen dose in a successful mutation breeding experiment. Therefore, in a multi-year project of mutation breeding, two widely cultivated varieties of cowpea viz., Gomati VU-89 and Pusa-578, were treated with gamma (γ) rays and sodium azide (SA) doses. The results reflected a proportionate increase in bio-physiological damages with the increase in mutagenic doses and caused a substantial reduction in mean seed germination and seedling height. Different cytological aberrations such as cytomixis, univalents, chromosome stickiness, precocious separation, unequal separation, bridges, laggards, disturbed polarity, dyads, triads, and polyads were observed in both varieties. All the mutagen doses induced a broader spectrum of cytological aberrations with varying frequencies.

Combining metaphase cytogenetics with single nucleotide polymorphism arrays can improve the diagnostic yield and identify prognosis more precisely in myelodysplastic syndromes

Background Myelodysplastic syndromes (MDS) encompass a group of heterogeneous haematopoietic stem cell malignancies characterised by ineffective haematopoiesis, cytological aberrations, and a propensity for progression to acute myeloid leukaemia. Diagnosis and disease prognostic stratification are much based on genomic abnormalities. The traditional metaphase cytogenetics analysis (MC) can detect about 40–60% aberrations. Single-nucleotide polymorphism arrays (SNP-A) karyotyping can detect copy number variations with a higher resolution and has a unique advantage in detection of copy number neutral loss of heterozygosity (CN-LOH). Combining these two methods may improve the diagnostic efficiency and accuracy for MDS. Methods We retrospectively analysed the data of 110 MDS patients diagnosed from January 2012 to December 2019 to compare the detection yield of chromosomal abnormalities by MC with by SNP-A, and the relationship between chromosomal abnormalities and prognosis. Results Our results showed that SNP-A improved the detection yield of chromosomal aberrations compared with MC (74.5 vs. 55.5%, p < .001). In addition, the positive yield could be further improved by combining MC with SNP-A to 77.3%, compared with MC alone. Univariate analysis showed that age >65 years, bone marrow blasts ≥5%, with acquired CN-LOH, new aberrations detected by SNP-A, TGA value > the median (81.435 Mb), higher risk by IPSS-R-MC, higher risk by IPSS-R-SNP-A all had poorer prognosis. More critically, multivariable analysis showed that age >65 years and higher risk by IPSS-R-SNP-A were independent predictors of inferior OS in MDS patients. Conclusion The combination of MC and SNP-A based karyotyping can further improve the diagnostic yield and provide more precise prognostic stratification in MDS patients. However, SNP-A may not completely replace MC because of its inability to detect balanced translocation and to detect different clones. From a practical point of view, we recommend the concurrent use of SNP-A and MC in the initial karyotypic evaluation for MDS patients on diagnosis and prognosis stratification. KEY MESSAGES SNP-A based karyotyping can further improve the MDS diagnostic yield and provide more precise prognostic stratification in MDS patients. Acquired CN-LOH is a characteristic chromosomal aberration of MDS, which should be integrated to the diagnostic project of MDS. The concurrent use of SNP-A and MC in the initial karyotypic evaluation for MDS patients can be recommended.

Quaternary Ammonium Compounds: Usage in Households during COVID-19 Pandemic, Boon, or Bane?

Quaternary ammonium compounds (QACs) have been used as disinfectants and as components in various household items since long. The furore and panic created during the COVID-19 pandemic triggered an unprecedented increase in their usage in health-care facilities as well as in households. This narrative attempts to explore the usage of various QACs in households during the pandemic and delve into the increased exposure and consequent health outcomes. A comprehensive literature search was performed on various databases to include the studies conducted on QACs since 2019. Multiple studies reported an increase in the exposure to QACs during the pandemic and this surge was reflected as adverse effects in human beings as well as the environment – cytological aberrations, intoxication, and damage to aquatic life being the main-stays.

The protective effect of the aqueous extract of Sida acuta BURM.F on lead nitrate-induced genotoxicity

This study investigated the protective effective of Sida acuta leaf extracts against the genotoxic effect of lead nitrate, a toxic heavy metal that easily permeate the ecosystem. The genotoxic and anti-genotoxic effects of the aqueous extract of S. acuta on onion cells (Allium cepa L.) was evaluated using the Allium cepa L. assay. Onion bulbs were exposed to 0.25 – 2.5 mg.mL-1 concentrations of the plant extract for analyses of induction of cytogenetic damage. There was observeda concentration-dependent decrease in mitotic index of the A. cepa roots cells compared to the negative control. Lead nitrate significantly induced chromosomal aberration in A. cepa root cells. This effect, however, was significantly ameliorated by the S. acuta leaf extract. This effect was demonstrated by the lower frequency of chromosome aberrations in lead nitrate treated root cells after exposure to the extract. Furthermore, the extract restricted the extent of lead-induced cytological aberrations in A. cepa. The findings in this study suggested the mitodepressive, antiproliferative and anti-genotoxic potentials of the extract.

In-situ toxicity assessment of pulp and paper industry wastewater on Trigonella foenum-graecum L: Potential source of cytotoxicity and chromosomal damage

This work aimed to study in-situ toxicity assessment of pulp and paper industry wastewater on Trigonella foenum-graecum L. Physico-chemical analysis of wastewater revealed high pH (8.1), total suspended solids, total dissolved solids, biochemical oxygen demand and chemical oxygen demand (89, 2160, 8670 and 25600 mg L−1 , respectively), electrical conductivity (2156 ms cm−1), and heavy metal (mg L−1) contents as Fe (79.61), Zn (49.06), Cu (6.07), Cd (6.07), Mg (19.66), and Ni (6.43), which were higher than compare to control The major pollutants detected via GC–MS analysis were hexadecanoic acid, octadecanoic acid, nonacosane, and β-sitosterol trimethylsilyl ether. UV–Vis spectrophotometry and Fourier transform infrared spectroscopy analyses of the wastewater confirmed the presence of residual organic and inorganic pollutants. The cytotoxicity and genotoxicity of the wastewater for plants were also assessed and revealed chromosomal and cytological aberrations in wastewater-treated T. foenum-graecum L. The accumulation of metals in and the effects of such accumulation on the physiology of T. foenum-graecum L. plants irrigated with wastewater were also studied, and it was concluded that antioxidant enzyme activity, chlorophyll, protein content, and dry weight were reduced in wastewater irrigated T. foenum-graecum L. plants compared to those in the control (fed with normal water). Scanning and transmission electron microscopy analyses of plant roots, root nodules, and stomata revealed the accumulation of heavy metals on the surfaces and in tissues. The present study highlights the urgent necessity of proper treatment of paper and pulp industry wastewater before their disposal into water bodies to control the damage to environment and aquatic life.

Morphological, cytological and molecular variations induced by gamma rays in Chrysanthemum morifolium ‘Donglinruixue’

Abstract The current study investigated the effects of gamma radiation on the death rate, morphological traits and meiotic abnormalities in ground-grown chrysanthemum ‘Donglinruixue’, and inter-simple sequence repeat (ISSR) markers were used to identify the DNA polymorphism among mutants. The results showed that the death rate significantly increased with increase in radiation dose. Semi-lethal (LD50) dose was approximately 35 Gy. Compared with unirradiated control, plant growth was significantly inhibited. After irradiation, a series of morphological variations and cytological aberrations occurred in radiated plants. The peak in variation frequency appeared at 35 Gy. In total, ISSR analysis produced 72 scorable bands, of which 64 (88.89%) were polymorphic. The current study demonstrated that gamma irradiation generates a sufficient number of induced mutations and that ISSR analysis offered a useful molecular marker analysis for the identification of mutants.

ENIGMATIC INDUCTION OF CYTOMIXIS IN ALLIUM CEPA ROOT MERISTEM BY AGLAIA EDULIS ROXB. LEAF EXTRACT AND ITS PHYTOCHEMICAL RATIONALE

Objective: The present study aims to analyze the potential of Aglaia edulis Roxb. leaf extract to induce cytological aberrations in Allium cepa root meristem and to determine the phytoconstituents in the extract.&#x0D; Methods: Cytotoxicity evaluation of the leaf methanolic extract was done using Allium cepa assay using various concentrations. Volatile phytoconstituents in the extract were determined using gas chromatography–mass spectrometry analysis.&#x0D; Results: Considerable number of cytomictic cells along with other aberrations was observed. The occurrence of cytomixis was found to be dose dependent where it ranged from 6.58±0.35 to 29.45±0.45. The percentage of cytomictic cells among the total aberrant cells was observed between 35.19±1.67 and 77.39±1.39. The phytochemical analysis of the plant extract revealed the presence of active secondary metabolites.&#x0D; Conclusion: The synergistic action of the active compounds might have triggered the phenomenon of cytomixis which, in turn, could be exploited for the production of polyploids.

Assessment of Nanotoxicity (Cadmium Sulphide and Copper Oxide) Using Cytogenetical Parameters in Coriandrum sativum L. (Apiaceae)

Present investigation deals with cytogenetical consequences (using attributes namely, seed germination, seedling length, mitotic index, mitotic and meiotic abnormalities and pollen grain sterilities) of cadmium sulphide (CdS) and copper oxide (CuO) nanoparticles (NPs) treatment in Coriandrum sativum L. (Family: Apiaceae, spice of commerce). Ethyl methanesulphonate (EMS), a conventional mutagen is used as positive control. Results suggest that both CdS- and CuO-NPs can induce growth inhibition and cause cytological aberrations in both mitotic and meiotic cells in the studied species. EMS also responds similarly as that of NPs. Study highlights that rooted plant species can be effectively used as model for assessment of nanotoxicity considering cytogenetical parameters.

Pap smear in women with leucorrhea : Experience in a tertiary medical college hospital of Bangladesh

Background : Poor genital hygiene has been responsible for high prevalence of excessive vaginal discharge. Leucorrhoea is the clinical evidence of infection and can be treated satisfactorily whenever diagnosed. Occurrence of various cervical epithelial lesion associated with discharge can be easily prevented if detected early. Majority of the patients with various cervical epithelial lesion attending in the hospital present with varying degree of vaginal discharge and cytological cellular aberrations in the cervical epithelium.Objective : The aim of the present study is to observe the various patterns of cervical epithelial lesions in cytopathology and associated infections in patients with Leucorrhoea.Methodology : This observational study was done over a period of ten months in Popular Medical college hospitals of Bangladesh. A total of 230 cases were included in the study with women of age range 15-45 years, complaining of leucorrhoea. After a thorough vaginal examination Pap smears were taken and immediately fixed in absolute alcohol and stained according to the papanicolaous technique. The cytopathological changes observed in the cervical smears were graded according to the Bethesda system for reporting cervical cytology.Results : Out of 230 cases the cytological patterns were found Normal in 4 (1.7%), Inflammatory 204 (88.3%), Low grade squamous intraepithelial (LSIL)10 (4.8%), High grade squamous intraepithelial (HSIL) 6(2.6%), Atypical squamous cells of undetermined significance (ASCUS) 6 (2.6%) and the distribution of different types of pathogens detected were Trichomonas 33 (70.62%), Candida albicans 19 (40.66%).Conclusion : In this study significant numbers of Leucorrhoea patients were detected with cervical squamous intraepithelial lesions (SIL) in which LSIL (Low grade squamous intraepithelial) was higher. Associated infections were Trichomonas and Candida albicans. Therefore cytological screening for early detection of cervical squamous intraepithelial lesion is essential routine medical examination for Leucorrhoea patients in gynaecological practice.Northern International Medical College Journal Vol.9(1) July 2017: 252-254

Ploidy Characterization of Axonopus by Meiotic Chromosome Counts and Flow Cytometry

Carpetgrasses (Axonopus spp.) have been used as home lawn, sports, and amenity turfgrasses in many locations around the world. Only limited efforts have focused on genetic improvement of Axonopus for turf. Before initiating any genetic improvement program, knowledge of ploidy differences within and among species in a germplasm collection is critical. We evaluated the ploidy variability in Axonopus compressus (Sw.) P. Beauv, Axonopus furcatus (Flüggé) Hitchc., and Axonopus fissifolius (Raddi) Kuhlm. using flow cytometry and meiotic chromosome counts. Meiotic chromosome observations combined with flow cytometry histograms results show that, within our collection, all genotypes of A. compressus were 2n = 4x = 40, one genotype of A. furcatus was 2n = 4x = 40, and all genotypes of A. fissifolius were 2n = 8x = 80 chromosomes. Although a detailed meiotic analysis was not conducted, photographic evidence supports the finding that meiosis, even in the high‐chromosome‐number A. fissifolius, was regular with very few cytological aberrations.

DNA hypermethylation analysis in sputum of asymptomatic subjects at risk for lung cancer participating in the NELSON trial: argument for maximum screening interval of 2 years

AimsLung cancer is the major contributor to cancer mortality due to metastasised disease at time of presentation. The current study investigated DNA hypermethylation of biomarkers RASSF1A, APC, cytoglobin, 3OST2, FAM19A4,...

Estimation of genetic variability, mutagenic effectiveness and efficiency in M2 flower mutant lines of Capsicum annuum L. treated with caffeine and their analysis through RAPD markers

In the present investigation healthy and certified seeds of Capsicum annuum were treated with five concentrations of caffeine i.e. 0.10%, 0.25%, 0.50%, 0.75% and 1.0%. Germination percentage, plants survival and pollen fertility were decreased with the increase of caffeine concentrations. Similarly root length and shoot length were decreased as the concentrations increased in M1 generation. Different mutants were isolated in M1 generation. In M2 generation, various flower mutants with changes in number of sepals, petals, anther size colour i.e. Trimerous, tetramerous, pentamerous with fused petals, hexamerous etc were segregated. Heptamerous and anther change was not observed in lower concentration viz. 0.1%. All these mutants showed significant changes in morphological characters and good breeding values at lower and intermediate concentrations. Mutagenic effectiveness and efficiency was observed on the basis of M2 flower mutant frequency. It was generally decreased with the increase of mutagen concentrations. Cytological aberrations in mutants showed the decreasing trend at meiotic final stages. These mutants were further analysed through RAPD method and on the basis of appearance of polymorphic DNA bands, they distinguished these flower mutants genotypically. Among 93 bands 44 bands were polymorphic which showed great genetic variation produced by caffeine. As an outcome of that the above caffeine concentrations are good for the induction of genetic variability in Capsicum genotype.

Cytological Studies in Cluster Bean by the Application of Physical and Chemical Mutagens (&lt;i&gt;Cyamopsis tetragonoloba&lt;/i&gt; L.)

The miotic and meotic behaviour is considered to be one of the most dependable indices to estimate the potency of mutagen cytological aberrations in plants serve as an excellent monitoring system for the determination of mutagens that may cause a genetic hazard in the present study cluster bean contains 7 bivalents (24 = 14) for the present investigation the plant exposed to dolf concentration of 60, 80, and 100kr gamma rays and 0.4, 0.6 and 0.8 % Mm ( EMS ) the present study reveals various chromosomal aberration includes stickiness precocisus movement ,single and anaphasis bridge laggards and synchronized movement of chromosomes at anaphase

Cytological Studies in Cluster Bean by the Application of Physical and Chemical Mutagens (&lt;i&gt;Cyamopsis tetragonoloba&lt;/i&gt; L.)

The miotic and meotic behaviour is considered to be one of the most dependable indices to estimate the potency of mutagen cytological aberrations in plants serve as an excellent monitoring system for the determination of mutagens that may cause a genetic hazard in the present study cluster bean contains 7 bivalents (24 = 14) for the present investigation the plant exposed to dolf concentration of 60, 80, and 100kr gamma rays and 0.4, 0.6 and 0.8 % Mm ( EMS ) the present study reveals various chromosomal aberration includes stickiness precocisus movement ,single and anaphasis bridge laggards and synchronized movement of chromosomes at anaphase

Genotoxic and anti-genotoxic effect of aqueous extracts ofSpondias mombinL.,Nymphea lotusL. andLuffa cylindricaL. onAllium ceparoot tip cells

Spondias mombin L., Nymphea lotus L. and Luffa cylindrica L. are commonly used in the traditional management of cancer in Nigeria. The genotoxic and anti-genotoxic effects of aqueous extracts of these plants was evaluated using the Allium cepa L. assay. Onion bulbs were exposed to 0.5–10 mg ml–1 concentrations (v/v) of each extract, prepared as practiced locally, for analyses of root growth inhibition and induction of cytogenetic damage, respectively. There was concentration-dependent, significant (p < 0.05) inhibition of root growth by the extracts when compared with the negative control. The EC50 for the decoctions of S. mombin, N. lotus and L. cylindrica were 1.3, 1.8 and 16.2 mg ml–1 respectively. All the extracts had mitodepressive effects on cell division, and induced chromosomal aberrations (p ˂ 0.05). They showed chemopreventive activity through reduction of cytological aberration induced by lead nitrate. These findings suggest inhibitory, anti-proliferative and anti-cytogenetic damage activities of aqueous extracts of the tested medicinal plants on A. cepa.

In Vivo Cytogenotoxicity and Oxidative Stress Induced by Electronic Waste Leachate and Contaminated Well Water

Environmental, plant and animal exposure to hazardous substances from electronic wastes (e-wastes) in Nigeria is increasing. In this study, the potential cytogenotoxicity of e-wastes leachate and contaminated well water samples obtained from Alaba International Electronic Market in Lagos, Nigeria, using induction of chromosome and root growth anomalies in Allium cepa, and micronucleus (MN) in peripheral erythrocytes of Clarias gariepinus, was evaluated. The possible cause of DNA damage via the assessments of liver malondialdehyde (MDA), catalase (CAT), reduced glutathione (GSH) and superoxide dismutase (SOD) as indicators of oxidative stress in mice was also investigated. There was significant (p &lt; 0.05) inhibition of root growth and mitosis in A. cepa. Cytological aberrations such as spindle disturbance, C-mitosis and binucleated cells, and morphological alterations like tumor and twisting roots were also induced. There was concentration-dependent, significant (p &lt; 0.05) induction of micronucleated erythrocytes and nuclear abnormalities such as blebbed nuclei and binucleated erythrocytes in C. gariepinus. A significant increase (p &lt; 0.001) in CAT, GSH and MDA with concomitant decrease in SOD concentrations were observed in the treated mice. Pb, As, Cu, Cr, and Cd analyzed in the tested samples contributed significantly to these observations. This shows that the well water samples and leachate contained substances capable of inducing somatic mutation and oxidative stress in living cells; and this is of health importance in countries with risk of e-wastes exposure.

EMS, sodium azide and gamma rays induced meiotic anomalies in Delphinium malabaricum (Huth) Munz

Meiotic cell division is a dynamic cellular process controlled by a large number of genes that act from premeiotic to postmeiotic mitosis. Mutation in these genes may cause anomalies that impair plant fertility. In this study, an attempt has therefore been made to understand the effects of ethyl methane sulfonate (EMS), sodium azide (SA) and gamma rays on the meiotic configuration of Delphinium malabaricum. The results demonstrated that the mutagens cause various types of cytological aberrations, such as univalents, chromatin bridges, laggards, fragments, stickiness and multinucleated cells. The maximum aberrations were found at higher doses/concentrations of the mutagens. The highest percentage of pollen mother cells showing abnormalities was induced by EMS followed by gamma rays and SA. The mutagen impact on chromosomal anomalies increased the frequency of pollen sterility.

Chromosomal and Nuclear Alterations in Root Tip Cells of Allium Cepa L. Induced by Alprazolam

ABSTRACTIntroduction:Alprazolam is a triazolobenzodiazepine used in panic disorders and other anxiety states. Target organ of Alprazolam is CNS, causing depression of respiration and consciousness.Aim:This study aimed to estimate the genotoxic potential of Alprazolam using Allium cepa test.Methods:Allium cepa is one of the most suitable plants for detecting different types of xenobiotics. The test enables the assessment of different genetic endpoints making possible damage to the DNA of humans to be predicted.Results:Alprazolam induced chromosomal (anaphase bridges, breaks, lagging and stickiness, abnormal spiralisation, multipolarity and polyploidy) and cytological aberrations, especially nuclear alterations (nuclear buds, fragmented nucleus and apoptotic bodies, cells without nucleus, binucleated and micronucleated cells), morphological alterations in shape and size of cells, spindle disturbance and polar deviation in root tip meristem cells of Allium cepa at all tested concentrations. Alprazolam also caused significant inhibition of mitotic index in these cells.Conclusion:These changes in cells are indicators of genotoxic potential of Alprazolam suggesting a need for further in vitro studies on animal and human lymphocytes as well as in vivo studies.

Cytogenotoxic effects of electronic waste leachate inAllium cepa

Information on the potentials of electronic waste (e-waste) leachate to induce genotoxicity in eukaryotic cells is scarce. In this study, we investigated the potential of raw and simulated e-waste leachates to induce cytotoxicity and DNA damage in Allium cepa. Roots of onion bulbs were grown in five concentrations: 1, 5, 10, 25 and 50% (v/v; leachate/tap water) of each of the leachate sample, tap water (negative control) and 0.25 ppm lead nitrate (positive control). Cytogenetic and root length inhibition analyses were evaluated at 48 and 72 hours respectively. There was concentration-dependent significant (p < 0.05) inhibition of root growth and cell proliferation compared to the negative control. The leachates also induced morphological modifications of the roots and cytological aberrations such as anaphase bridge, sticky chromosomes and binucleate cells. Fe, Cd, Mn, Cu, Ni, Cr As, Zn and Pb analysed in the samples were believed to play significant role in the observed cytogenotoxicity in A. cepa. These ...

Impact of mutagenesis on cytological behavior in relation to specific alkaloids in Opium Poppy (Papaver somniferumL.)

Abstract The present study was an effort to identify appropriate dose of mutagens for the elevation of specific alkaloids especially thebaine through induced mutagenesis in opium poppy (P. somniferum L.) using two stable high yielding varieties NBRI-1 and NBRI-5. Simultaneously, the study also deals correlation between cytological aberrations and their effects on alkaloid quantity. Among the two varieties NBRI-1 was more sensitive than NBRI-5. The EMS was reported most potent mutagen for creation of chromosomal abnormalities. The treatment kR 10+0.2% EMS and kR10+0.4% EMS possessed high chiasms frequency. The dose 0.2% EMS in combinations with all doses of gamma accelerates the total alkaloid as well as individual alkaloid content.