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1.
Forensic Sci Int Genet ; 73: 103125, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39182373

RESUMO

Forensic genetic analyses aim to retrieve as much information as possible from biological trace material recovered from crime scenes. While standard short tandem repeat (STR) profiling is essential to individualize biological traces, its significance is diminished in crime scenarios where the presence of a suspect's DNA is acknowledged by all parties. In such cases, forensic (m)RNA analysis can provide crucial contextualizing information on the source level about a trace's composition, i.e., body fluids/tissues, and has therefore emerged as a powerful tool for modern forensic investigations. However, the question which of several suspects contributed a specific component (body fluid) to a mixed trace cannot be answered by RNA analysis using conventional methods. This individualizing information is stored within the sequence of the mRNA transcripts. Massively parallel sequencing (MPS) represents a promising alternative, offering not only higher multiplex capacity, but also the typing of individual coding region SNPs (cSNPs) to enable the assignment of contributors to mixture components, thereby reducing the risk of association fallacies. Herein, we describe the development of an extensive mRNA/cSNP panel for targeted sequencing on the IonTorrent S5 platform. Our panel comprises 30 markers for the detection of six body fluids/tissues (blood, saliva, semen, skin, vaginal and menstrual secretion), along with 70 linkage-controlled cSNPs for contributor assignment. It exhibited high reliable detection sensitivity with RNA inputs down to 0.75 ng and a conservatively calculated probability of identity of 0.03 - 6 % for individual body fluid-specific cSNP profiles. Limitations and areas for future work include RNA-related allele imbalances, inclusion of markers to correctly identify rectal mucosa and the optimization of specific markers. In summary, our new panel is intended to be a major step forward to interpret biological evidence at sub-source and source level based on cSNP attribution of a body fluid component to a suspect and victim, respectively.


Assuntos
Sequenciamento de Nucleotídeos em Larga Escala , Polimorfismo de Nucleotídeo Único , RNA Mensageiro , Humanos , RNA Mensageiro/genética , Feminino , Sêmen/química , Genética Forense/métodos , Muco do Colo Uterino/química , Saliva/química , Análise de Sequência de RNA , Líquidos Corporais/química , Masculino , Vagina , Repetições de Microssatélites , Menstruação , Reação em Cadeia da Polimerase
2.
Forensic Sci Int Genet ; 73: 103098, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39089060

RESUMO

A rapid, sensitive and specific test for blood is reported based on a novel application of recombinase polymerase amplification integrated with CRISPR-Cas and lateral flow assay (LFA). The blood specific marker ALAS2 was used as the target to record the presence of blood. The assay used either RNA extracted from a body fluid as a template, or omitting this extraction step and using a direct approach where the questioned body fluid was added directly to the assay. The assay only detected blood (all peripheral blood and some menstrual blood samples) and no other body fluid (semen, saliva, or vaginal fluid). The limit of detection varied from an initial template of 0.195 ng extracted RNA (27 dilution) or 0.0218 µL (26 dilution) liquid peripheral blood. The assay gave the expected result when peripheral blood was mixed with saliva: ratios of peripheral blood/saliva at 19:1, 3:1, 1:1, 1:3 and 1:19 all gave a positive result using extracted RNA. By contrast, only three ratios of peripheral blood and saliva gave a positive result for blood (19:1, 3:1 and 1:1) when adding these two body fluids directly. When peripheral blood was mixed with semen there was a strong inhibition of the assay and ALAS2 could only be detected at ratio of 19:1 using RNA. Using reconstituted peripheral bloodstains gave comparable results to liquid peripheral blood. This is the first application of RT-RPA integrated CRISPR and combined with a LFA assay to detect body fluid-specific RNA. The proposed method opens up the potential to perform this method remote from laboratories such as at crime scenes.


Assuntos
5-Aminolevulinato Sintetase , Sistemas CRISPR-Cas , Saliva , Humanos , Saliva/química , Feminino , 5-Aminolevulinato Sintetase/genética , Masculino , Menstruação , Limite de Detecção , Sêmen/química , RNA/genética , Técnicas de Amplificação de Ácido Nucleico , Muco do Colo Uterino/química
3.
Forensic Sci Int ; 362: 112147, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39067179

RESUMO

The identification of biological fluids at crime scenes contributes to crime scene reconstruction and provides investigative leads. Traditional methods for body fluid identification are limited in terms of sensitivity and are mostly presumptive. Emerging methods based on mRNA and DNA methylation require high quality template source. An exploitable characteristic of body fluids is their distinct microbial profiles allowing for the discrimination of body fluids based on microbiome content. Microbial DNA is highly abundant within the body, robust and stable and can persist in the environment long after human DNA has degraded. 16S rRNA sequencing is the gold standard for microbial analysis; however, NGS is costly, and requires intricate workflows and interpretation. Also, species level resolution is not always achievable. Based on the current challenges, the first objective of this study was to develop a multiplex conventional PCR assay to identify vaginal fluid and saliva by targeting species-specific 16S rRNA microbial markers. The second objective was to employ droplet digital PCR (ddPCR) as a novel approach to quantify bacterial species alone and in a mixture of body fluids. Lactobacillus crispatus and Streptococcus salivarius were selected because of high abundance within vaginal fluid and saliva respectively. While Fusobacterium nucleatum and Gardnerella vaginalis, though present in healthy humans, are also frequently found in oral and vaginal infections, respectively. The multiplex PCR assay detected L. crispatus and G. vaginalis in vaginal fluid while F. nucleatum and S. salivarius was detected in saliva. Multiplex PCR detected F. nucleatum, S. salivarius and L. crispatus in mixed body fluid samples while, G. vaginalis was undetected in mixtures containing vaginal fluid. For samples exposed at room temperature for 65 days, L. crispatus and G. vaginalis were detected in vaginal swabs while only S. salivarius was detected in saliva swabs. The limit of detection was 0.06 copies/µl for F. nucleatum (2.5 ×10-9 ng/µl) and S. salivarius (2.5 ×10-6 ng/µl). L. crispatus and G. vaginalis had detection limits of 0.16 copies/µl (2.5 ×10-4 ng/µl) and 0.48 copies/µl (2.5 ×10-7 ng/µl). All 4 bacterial species were detected in mixtures and aged samples by ddPCR. No significant differences were observed in quantity of bacterial markers in saliva and vaginal fluid. The present research reports for the first time the combination of the above four bacterial markers for the detection of saliva and vaginal fluid and highlights the sensitivity of ddPCR for bacterial quantification in pure and mixed body fluids.


Assuntos
DNA Bacteriano , Reação em Cadeia da Polimerase Multiplex , RNA Ribossômico 16S , Saliva , Vagina , Humanos , Saliva/microbiologia , Saliva/química , Feminino , DNA Bacteriano/análise , Vagina/microbiologia , Streptococcus salivarius/genética , Lactobacillus/isolamento & purificação , Lactobacillus/genética , Gardnerella vaginalis/isolamento & purificação , Gardnerella vaginalis/genética , Muco do Colo Uterino/microbiologia , Fusobacterium nucleatum/isolamento & purificação , Fusobacterium nucleatum/genética
4.
Sci Rep ; 14(1): 14151, 2024 06 19.
Artigo em Inglês | MEDLINE | ID: mdl-38898193

RESUMO

We compared the efficacy of 4 mg drospirenone (DRSP) progestin-only pills (POPs) versus combined oral contraceptive pills (COCs) containing 0.02 mg of ethinyl estradiol (EE) and 0.075 mg of gestodene (GS) in ovulation inhibition and inducing unfavorable cervical mucus changes using a delayed-starting approach. This randomized controlled trial involved 36 participants aged 18-45 years. The major outcomes included ovulation inhibition assessed using the Hoogland and Skouby score, and cervical mucus permeability, assessed using the modified World Health Organization score. The results demonstrated ovulation inhibition rates of 77.8% for the EE/GS group and 88.9% for the DRSP group. The risk ratio and absolute risk reduction were 0.50 (95% confidence interval [CI]: 0.10, 2.40) and - 0.11 (95% CI: - 0.35, 0.13), respectively, satisfying the 20% non-inferiority margin threshold. The median time to achieve unfavorable cervical mucus changes was comparable between the DRSP (3 days, interquartile range [IQR]: 6 days) and EE/GS (3.5 days, IQR: 4 days) groups. However, the DRSP group had a higher incidence of unscheduled vaginal bleeding (55.56% vs. 11.11%; p = 0.005). DRSP-only pills, initiated on days 7-9 of the menstrual cycle, were non-inferior to EE/GS pills in ovulation inhibition. However, they exhibited delayed unfavorable cervical mucus changes compared to the standard two-day backup recommendation.Clinical trial registration: Thai Clinical Trials Registry (TCTR20220819001) https://www.thaiclinicaltrials.org/show/TCTR20220819001 .


Assuntos
Androstenos , Anticoncepcionais Orais Combinados , Etinilestradiol , Inibição da Ovulação , Humanos , Feminino , Adulto , Etinilestradiol/administração & dosagem , Androstenos/administração & dosagem , Androstenos/efeitos adversos , Adulto Jovem , Adolescente , Anticoncepcionais Orais Combinados/administração & dosagem , Inibição da Ovulação/efeitos dos fármacos , Método Simples-Cego , Pessoa de Meia-Idade , Norpregnenos/administração & dosagem , Norpregnenos/efeitos adversos , Ovulação/efeitos dos fármacos , Muco do Colo Uterino/efeitos dos fármacos
5.
Forensic Sci Int Genet ; 71: 103066, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38833776

RESUMO

In forensic practice, mixture stains containing various body fluids are common, presenting challenges for interpretation, particularly in multi-contributor mixtures. Traditional STR profiles face difficulties in such scenarios. Over recent years, RNA has emerged as a promising biomarker for body fluid identification, and mRNA polymorphism has shown excellent performance in identifying body fluid donors in previous studies. In this study, a massively parallel sequencing assay was developed, encompassing 202 coding region SNPs (cSNPs) from 45 body fluid/tissue-specific genes to identify both body fluid/tissue origin and the respective donors, including blood, saliva, semen, vaginal secretion, menstrual blood, and skin. The specificity was evaluated by examining the single-source body fluids/tissue and revealed that the same body fluid exhibited similar expression profiles and the tissue origin could be identified. For laboratory-generated mixtures containing 2-6 different components and mock case mixtures, the donor of each component could be successfully identified, except for the skin donor. The discriminatory power for all body fluids ranged from 0.997176329 (menstrual blood) to 0.99999999827 (blood). The concordance of DNA typing and mRNA typing for the cSNPs in this system was also validated. This cSNP typing system exhibits excellent performance in mixture deconvolution.


Assuntos
Muco do Colo Uterino , Sequenciamento de Nucleotídeos em Larga Escala , Polimorfismo de Nucleotídeo Único , RNA Mensageiro , Saliva , Sêmen , Humanos , RNA Mensageiro/genética , Feminino , Sêmen/química , Muco do Colo Uterino/química , Saliva/química , Masculino , Líquidos Corporais/química , Impressões Digitais de DNA , Pele/química , Menstruação , Genética Forense/métodos , Doadores de Tecidos , Análise de Sequência de RNA
6.
Cancer Sci ; 115(8): 2795-2807, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38749770

RESUMO

Currently, human papillomavirus tests and cytology are used to screen for cervical cancer. However, more accurate ancillary screening tests are needed. MicroRNAs (miRNAs) and cytokines are promising biomarkers that are aberrantly expressed in cervical cancer. Therefore, the potential of developing new screening markers based on the levels of miRNAs and cytokines in serum and local mucus samples from the same patients with cervical neoplasia was investigated. miRNA screening was performed by microarray and measurement using real-time reverse-transcriptase PCR. Cytokine were measured using multiplex bead assay, and changes in expressions were analyzed based on disease severity. As lesions progressed, miR-20b-5p, -155-5p, -144-3p, -451a, and -126-3p expression levels were increased in mucus, and miR-16-5p, -223-3p, and -451a expression levels were decreased in serum. Regarding cytokines, IL-6, IL-8, monocyte chemoattractant protein-1, Eotaxin, interferon-γ, and RANTES were increased, whereas granulocyte-colony-stimulating factor (G-CSF) was significantly decreased in mucus. miRNAs and cytokines in serum did not have high diagnostic accuracy. However, a combination of miR-20b-5p, -451a, -126-3p, Eotaxin, as well as G-CSF in mucus samples, had high diagnostic accuracy with an area under the receiver operating characteristic curve of 0.989 (0.979-0.999). Our results suggest that using mucus for this ancillary test is more beneficial than serum.


Assuntos
Muco do Colo Uterino , Citocinas , MicroRNAs , Neoplasias do Colo do Útero , Humanos , Feminino , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/sangue , Neoplasias do Colo do Útero/genética , MicroRNAs/sangue , Citocinas/sangue , Citocinas/metabolismo , Pessoa de Meia-Idade , Adulto , Biomarcadores Tumorais/sangue , Idoso , Detecção Precoce de Câncer/métodos
7.
Emerg Microbes Infect ; 13(1): 2352520, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38713593

RESUMO

Vaginal transmission from semen of male Ebola virus (EBOV) survivors has been implicated as a potential origin of Ebola virus disease (EVD) outbreaks. While EBOV in semen must traverse cervicovaginal mucus (CVM) to reach target cells, the behaviour of EBOV in CVM is poorly understood. CVM contains substantial quantities of IgG, and arrays of IgG bound to a virion can develop multiple Fc-mucin bonds, immobilizing the IgG/virion complex in mucus. Here, we measured the real-time mobility of fluorescent Ebola virus-like-particles (VLP) in 50 CVM specimens from 17 women, with and without ZMapp, a cocktail of 3 monoclonal IgGs against EBOV. ZMapp-mediated effective trapping of Ebola VLPs in CVM from a subset of women across the menstrual cycle, primarily those with Lactobacillus crispatus dominant microbiota. Our work underscores the influence of the vaginal microbiome on IgG-mucin crosslinking against EBOV and identifies bottlenecks in the sexual transmission of EBOV.


Assuntos
Ebolavirus , Doença pelo Vírus Ebola , Vagina , Humanos , Feminino , Ebolavirus/fisiologia , Vagina/virologia , Doença pelo Vírus Ebola/virologia , Doença pelo Vírus Ebola/transmissão , Vírion , Imunoglobulina G , Adulto , Muco do Colo Uterino/virologia , Muco/virologia
8.
J Forensic Sci ; 69(4): 1481-1489, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38703136

RESUMO

The potential evidential value of male underwear in cases of alleged sexual assault is often overlooked. Male underwear can be a critical item in the investigation of alleged sexual assaults. Body fluids/DNA, which may transfer to the penis during sexual contact, may in turn transfer to the inside front of the underwear, and persist for months or years, provided the underwear are not washed. Here, we demonstrate how the case circumstances drive the sampling strategy of male underwear, in order to maximize the effectiveness of the forensic analysis. Sampling considerations including recovery methods and sampling sequence are discussed, and a methodical examination strategy of male underwear is proposed. To highlight the pertinence of male underwear to the investigation of alleged sexual assaults, three real-life cases are discussed, in which male underwear were examined for multiple body fluids/DNA, and the findings obtained proved evidentially significant. The different cases demonstrate the versatility of male underwear examination in situations, where different body fluids and DNA may transfer based on the specific allegation, and emphasize how targeted sampling can allow the scientist to assess the probability of the findings based on two competing propositions. Accurate sampling strategies are imperative for robust probability assignment in evaluative reporting of scientific findings.


Assuntos
Vestuário , DNA , Manejo de Espécimes , Humanos , Masculino , DNA/análise , DNA/isolamento & purificação , Adulto , Impressões Digitais de DNA , Delitos Sexuais , Feminino , Sêmen/química , Muco do Colo Uterino/química , Reação em Cadeia da Polimerase , Adulto Jovem
9.
Animal ; 18(5): 101136, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38626706

RESUMO

Internationally, cervical artificial insemination (AI) in sheep yields low pregnancy rates when frozen-thawed semen is used. An exception to this is in Norway where vaginal AI of frozen-thawed semen to a natural oestrus yields non-return rates in excess of 60%, which has been attributed to the ewe breed used in Norway. This study used both metabolomics and an RNA-sequencing approach to assess the lipid production and composition from cervical mucus and tissue of four European ewe breeds (n = 28-30 ewes per breed) with previously reported differences in pregnancy rates following cervical AI with frozen-thawed semen. These breeds included Suffolk (exhibiting low fertility), Belclare (medium fertility) as well as Norwegian White Sheep and Fur (both with high fertility and pregnancy rates > 60%) at both a synchronised and natural oestrous cycle. The aim was to explore the differences between ewe breeds in the lipidomic profile and to identify candidate biomarkers associated with an optimal environment for cervical sperm transport. The results revealed the identification of 255 lipids, of which 170, 102 and 83 were different between ewe breeds, types of cycle and affected by their interaction, respectively (P < 0.05). Reduced levels of lipids involved in the resolution of inflammation (i.e. 14-HDoHE,17-HDoHE, 15-HETE) were identified in the low-fertility Suffolk breed compared to high-fertility ewe breeds. However, there was an up-regulation of the COX pathway accompanied by increased levels of prostaglandins in the Suffolk breed. These findings indicated a sub-optimal and pro-inflammatory environment that could have a negative effect on cervical sperm transport.


Assuntos
Muco do Colo Uterino , Colo do Útero , Lipidômica , Animais , Feminino , Muco do Colo Uterino/metabolismo , Muco do Colo Uterino/química , Ovinos/fisiologia , Colo do Útero/metabolismo , Masculino , Espermatozoides/metabolismo , Inseminação Artificial/veterinária , Gravidez , Fertilidade , Sêmen/metabolismo
10.
Forensic Sci Int ; 359: 112032, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38688209

RESUMO

Criminal investigations, particularly sexual assaults, frequently require the identification of body fluid type in addition to body fluid donor to provide context. In most cases this can be achieved by conventional methods, however, in certain scenarios, alternative molecular methods are required. An example of this is the detection of menstrual fluid and vaginal material, which are not able to be identified using conventional techniques. Endpoint reverse-transcription PCR (RT-PCR) is currently used for this purpose to amplify body fluid specific messenger RNA (mRNA) transcripts in forensic casework. Real-time quantitative reverse-transcription PCR (RT-qPCR) is a similar method but utilises fluorescent markers to generate quantitative results in the form of threshold cycle (Cq) values. Despite the uncertainty surrounding body fluid identification, most interpretation guidelines utilise categorical statements. Probabilistic modelling is more realistic as it reflects biological variation as well as the known performance of the method. This research describes the application of various machine learning models to single-source mRNA profiles obtained by RT-qPCR and assesses their performance. Multinomial logistic regression (MLR), Naïve Bayes (NB), and linear discriminant analysis (LDA) were used to discriminate between the following body fluid categories: saliva, circulatory blood, menstrual fluid, vaginal material, and semen. We identified that the performance of MLR was somewhat improved when the quantitative dataset of the original Cq values was used (overall accuracy of approximately 0.95) rather than presence/absence coded data (overall accuracy of approximately 0.94). This indicates that the quantitative information obtained by RT-qPCR amplification is useful in assigning body fluid class. Of the three classification methods, MLR performed the best. When we utilised receiver operating characteristic curves to observe performance by body fluid class, it was clear that all methods found difficulty in classifying menstrual blood samples. Future work will involve the modelling of body fluid mixtures, which are common in samples analysed as part of sexual assault investigations.


Assuntos
Teorema de Bayes , Muco do Colo Uterino , Aprendizado de Máquina , Menstruação , RNA Mensageiro , Reação em Cadeia da Polimerase em Tempo Real , Saliva , Sêmen , Humanos , Feminino , Saliva/química , Muco do Colo Uterino/química , Sêmen/química , RNA Mensageiro/análise , Modelos Logísticos , Análise Discriminante , Masculino , Líquidos Corporais/química , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Modelos Estatísticos , Análise Química do Sangue
11.
Forensic Sci Int Genet ; 71: 103045, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38615496

RESUMO

Identifying the sources of biosamples found at crime scenes is crucial for forensic investigations. Among the markers used for body fluid identification (BFI), mRNA has emerged as a well-studied marker because of its high specificity and remarkable stability. Despite this potential, commercially available mRNA kits specifically designed for BFI are lacking. Therefore, we developed an mRNA kit that includes 21 specific mRNA markers of body fluids, along with three housekeeping genes for BFI, to identify four forensic-relevant fluids (blood, semen, saliva, and vaginal fluids). In this study, we tested 451 single-body-fluid samples, validated the universality of the mRNA kit, and obtained a gene expression profile. We performed the validation studies in triplicates and determined the sensitivity, specificity, stability, precision, and repeatability of the mRNA kit. The sensitivity of the kit was found to be 0.1 ng. Our validation process involved the examination of 59 RNA mixtures, 60 body fluids mixtures, and 20 casework samples, which further established the reliability of the kit. Furthermore, we constructed five classifiers that can handle single-body fluids and mixtures using this kit. The classifiers output possibility values and identify the specific body fluids of interest. Our results showed the reliability and suitability of the BFI kit, and the Random Forest classifier performed the best, with 94% precision. In conclusion, we developed an mRNA kit for BFI which can be a promising tool for forensic practice.


Assuntos
Muco do Colo Uterino , RNA Mensageiro , Saliva , Sêmen , Humanos , RNA Mensageiro/genética , Saliva/química , Feminino , Sêmen/química , Muco do Colo Uterino/química , Reprodutibilidade dos Testes , Masculino , Genética Forense/métodos , Sensibilidade e Especificidade , Reação em Cadeia da Polimerase em Tempo Real , Marcadores Genéticos , Análise Química do Sangue , Corantes Fluorescentes , Reação em Cadeia da Polimerase Multiplex
13.
Metabolomics ; 19(7): 59, 2023 06 20.
Artigo em Inglês | MEDLINE | ID: mdl-37338596

RESUMO

INTRODUCTION: Cervical artificial insemination (AI) with frozen-thawed semen in sheep has yielded unacceptably low pregnancy rates. The exception is in Norway where vaginal AI yields non-return rates in excess of 60%, which has been attributed to the ewe breed used. OBJECTIVES AND METHODS: This study aimed to characterise, for the first time, the ovine follicular phase cervical mucus metabolome, with a focus on the amino acid profile. Cervical mucus was collected from four European ewe breeds with known differences in pregnancy rates following cervical AI with frozen-thawed semen. These were Suffolk (low fertility), Belclare (medium fertility), Norwegian White Sheep (NWS) and Fur (both high fertility). RESULTS: A total of 689 metabolites were identified in the cervical mucus of all the four ewe breeds. Of these, 458 metabolites were altered by ewe breed, which had the greatest effect in the dataset (P < 0.05). We detected 194 metabolites involved in the amino acid pathway, of which 133, 56 and 63 were affected by ewe breed, type of cycle and their interaction, respectively (P < 0.05). N-methylhydantoin and N-carbamoylsarcosine (degradation products of creatinine pathway) exhibited the greatest fold change decrease in the Suffolk breed compared to Fur and NWS (P < 0.001). Oxidized metabolites were also decreased in Suffolk compared to high fertility breeds (P < 0.05). In contrast, other metabolites such as 3-indoxyl-sulfate, putrescine, cadaverine were significantly increased in Suffolk at the synchronised cycle. CONCLUSION: The suboptimal amino acid profile in the cervical mucus of the low fertility Suffolk breed may have negative consequences for sperm transport.


Assuntos
Muco do Colo Uterino , Sêmen , Gravidez , Feminino , Ovinos , Animais , Masculino , Transporte Espermático , Metabolômica , Inseminação Artificial/veterinária
14.
Ceska Gynekol ; 88(1): 4-12, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36858967

RESUMO

Cervical mucus is a viscous fluid functioning as a cervix plug. Products of the endometrial and cervical glands can be detected in the cervical mucus. Cervical mucus is further enriched with transudate originating from the fallopian tubes and proteins originating from the ovaries, peritoneum and distant tissues. With increasing levels of ovarian estrogens, the properties of cervical mucus for possible collection and processing change appropriately. For these reasons, we chose a group of 10 patients treated in the center of assisted reproduction by controlled ovarian stimulation for in vitro fertilization. This study focuses on the proteomic characterization of cervical mucus and localizes the possible sources of the identified proteins. The most abundant proteins were extracellular proteins, mainly mucins; however, most of the identified proteins, present usually in lower quantities, were of intracellular origin. The tissue analysis revealed that proteins from female reproductive organs are also expressed in other tissues in addition to female reproductive organs, but also proteins specific to the testis, liver, placenta, retina, and cerebellum. This study confirms the suitability and high potential of cervical mucus as a source of proteomic bio-markers not only for the dia-gnosis of the female reproductive tract.


Assuntos
Muco do Colo Uterino , Proteoma , Gravidez , Masculino , Humanos , Feminino , Proteômica , Ovário , Exsudatos e Transudatos
16.
J Assist Reprod Genet ; 40(4): 865-871, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36786949

RESUMO

AIM: To compare the pregnancy outcomes between physiologic saline and G-Rinse medium solution for cervical mucus washing, in fresh elective single-embryo transfers (ET) in women under the age of 37. MATERIAL AND METHODS: This was a retrospective data analysis performed in a single in vitro fertilization (IVF) center between February 2018 and November 2021. Women younger than 37 years who underwent single elective ET were included and all women had anti-Mullerian hormone (AMH) levels ≥ 1.5 ng/ml. Age, body mass index (BMI), AMH levels, and pregnancy outcomes as clinical pregnancy rate (CPR) and live birth rate (LBR) were analyzed. RESULTS: Study population consisted of 75 women in the G-Rinse medium solution group and 97 women in the physiologic saline group. Clinical pregnancy rate was 58.7% and 61.9% in the G-Rinse medium solution group and saline group, respectively (p = 0.673), and LBR was calculated as 41.3% and 47.4% in the G-Rinse medium solution group and saline group, respectively (p = 0.430). A log-binomial regression model was used and the model was adjusted for BMI to evaluate the effect of the cervical mucus washing method on the pregnancy outcomes. There was an estimated 5% decrease in the relative risk for CPR in the G-Rinse medium solution group compared to the saline group (95% CI: 0.74 to 1.2, p = 0.673). There was an estimated 13% reduction in the relative risk for LBR in the G-Rinse medium solution group compared to the saline group (95% CI: 0.62 to 1.23, p = 0.430). They were both statistically not significant. CONCLUSION: In our study, the replacement of using G-Rinse medium solution to physiologic saline solution for cervical cleaning did not change CPR and LBR outcomes. Using physiologic saline solution can be a good alternative approach for ectocervical washing during embryo transfer in selected population because of its lower costs, easy accessibility, and common use.


Assuntos
Resultado da Gravidez , Solução Salina , Gravidez , Humanos , Feminino , Taxa de Gravidez , Estudos Retrospectivos , Muco do Colo Uterino , Fertilização in vitro/métodos , Transferência Embrionária/métodos , Nascido Vivo/epidemiologia
17.
Int J Mol Sci ; 24(2)2023 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-36674559

RESUMO

Cervical mucus (CM) is a viscous fluid that is produced by the cervical glands and functions as a uterine cervix plug. Its viscosity decreases during ovulation, providing a window for non-invasive sampling. This study focuses on proteomic characterization of CM to evaluate its potential as a non-invasively acquired source of biomarkers and in understanding of molecular (patho)physiology of the female genital tract. The first objective of this work was to optimize experimental workflow for CM processing and the second was to assess differences in the proteomic composition of CM during natural ovulatory cycles obtained from intrauterine insemination (IUI) cycles and in vitro fertilization (IVF) cycles with controlled ovarian hyperstimulation. Proteomic analysis of CM samples revealed 4370 proteins involved in processes including neutrophil degranulation, cellular stress responses, and hemostasis. Differential expression analysis revealed 199 proteins enriched in IUI samples and 422 enriched in IVF. The proteins enriched in IUI were involved in phosphatidic acid synthesis, responses to external stimulus, and neutrophil degranulation, while those enriched in IVF samples were linked to neutrophil degranulation, formation of a cornified envelope and hemostasis. Subsequent analyses clarified the protein composition of the CM and how it is altered by hormonal stimulation of the uterus.


Assuntos
Muco do Colo Uterino , Inseminação Artificial , Humanos , Feminino , Proteoma , Proteômica , Fertilização in vitro , Biomarcadores
18.
Semin Reprod Med ; 41(5): 200-208, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38262442

RESUMO

The female lower reproductive tract microbiota is a complex ecosystem comprising various microorganisms that play a pivotal role in maintaining women's reproductive well-being. During pregnancy, the vaginal microbiota undergoes dynamic changes that are important for a successful gestation. This review summarizes the implications of the cervical mucus plug microenvironment and its profound impact on reproductive health. Further, the symbiotic relationship between the vaginal microbiome and the cervical mucus plug is highlighted, with a special emphasis on how this natural barrier serves as a guardian against ascending infections. Understanding this complex host-microbes interplay could pave the way for innovative approaches to improve women's reproductive health and fertility.


Assuntos
Muco do Colo Uterino , Ecossistema , Gravidez , Feminino , Humanos , Reprodução , Vagina , Saúde da Mulher
19.
Sci Transl Med ; 14(673): eabm2417, 2022 11 30.
Artigo em Inglês | MEDLINE | ID: mdl-36449601

RESUMO

Close to half of the world's pregnancies are still unplanned, reflecting a clear unmet need in contraception. Ideally, a contraceptive would provide the high efficacy of hormonal treatments, without systemic side effects. Here, we studied topical reinforcement of the cervical mucus by chitosan mucoadhesive polymers as a form of female contraceptive. Chitosans larger than 7 kDa effectively cross-linked human ovulatory cervical mucus to prevent sperm penetration in vitro. We then demonstrated in vivo using the ewe as a model that vaginal gels containing chitosan could stop ram sperm at the entrance of the cervical canal and prevent them from reaching the uterus, whereas the same gels without chitosan did not substantially limit sperm migration. Chitosan did not affect sperm motility in vitro or in vivo, suggesting reinforcement of the mucus physical barrier as the primary mechanism of action. The chitosan formulations did not damage or irritate the ewe vaginal epithelium, in contrast to nonoxynol-9 spermicide. The demonstration that cervical mucus can be reinforced topically to create an effective barrier to sperm may therefore form the technological basis for muco-cervical barrier contraceptives with the potential to become an alternative to hormonal contraceptives.


Assuntos
Muco do Colo Uterino , Quitosana , Humanos , Gravidez , Masculino , Animais , Feminino , Ovinos , Motilidade dos Espermatozoides , Sêmen , Espermatozoides , Anticoncepcionais
20.
Sci Rep ; 12(1): 16231, 2022 09 28.
Artigo em Inglês | MEDLINE | ID: mdl-36171233

RESUMO

Cervical cancer is the fourth most common cancer in women worldwide. Although cytology or HPV testing is available for screening, these techniques have their drawbacks and optimal screening methods are still being developed. Here, we sought to determine whether aberrant expression of miRNAs in cervical mucus could be an ancillary test for cervical neoplasms. The presence of miRNAs in 583 and 126 patients (validation and external cohorts) was determined by real-time RT-PCR. Performance of a combination with five miRNAs (miR-126-3p, -451a -144-3p, -20b-5p and -155-5p) was estimated by ROC curve analysis. Predicted probability (PP) was estimated by nomograms comprising -ΔCt values of the miRNAs, HPV genotype and age. A combination of five miRNAs showed a maximum AUC of 0.956 (95% CI: 0.933-0.980) for discriminating cancer. Low PP scores were associated with good prognosis over the 2-year observation period (p < 0.05). Accuracy for identifying cancer and cervical intraepithelial neoplasia (CIN) 3 + by nomogram was 0.983 and 0.966, respectively. PP was constant with different storage conditions of materials. We conclude that nomograms using miRNAs in mucus, HPV genotype and age could be useful as ancillary screening tests for cervical neoplasia.


Assuntos
MicroRNAs , Infecções por Papillomavirus , Displasia do Colo do Útero , Neoplasias do Colo do Útero , Muco do Colo Uterino , Detecção Precoce de Câncer/métodos , Feminino , Genótipo , Humanos , MicroRNAs/genética , Nomogramas , Probabilidade , Sensibilidade e Especificidade , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/patologia , Displasia do Colo do Útero/patologia
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