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Yu Y, Yu J, Cui X, Sun X, Yu X. TNF-α-induced down-regulation of type I interferon receptor contributes to acquired resistance of cervical squamous cancer to Cisplatin. J Antibiot (Tokyo) 2024; 77:102-110. [PMID: 38102186 DOI: 10.1038/s41429-023-00686-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 12/17/2023]
Abstract
We aimed to investigate the effects of tumor necrosis factor (TNF)-α on the expression of interferon α/β receptor subunit 1 (IFNAR1) and cervical squamous cancer (CSCC) resistance to Cisplatin, as well as the underlying mechanisms. Kaplan-Meier analysis was used to plot the overall survival curves. SiHa cells were treated with 20 ng/ml TNF-α to determine cell proliferation in human CSCC cells and the expression of IFNAR1. The effects of TNF-α on the downstream signaling pathway, including casein kinase 1α (CK1α), were investigated using the caspase protease inhibitor FK009, the c-Jun kinase inhibitor SP600125, and the nuclear factor kappa-B inhibitor ammonium pyrrolidinedithiocarbamate (PDTC). TNF-α induced down-regulation of IFNAR1 in human CSCC cells and promoted proliferation of SiHa cells. SiHa cells were transfected with the catalytic inactive mutant CK1α K49A, and the ability of TNF-α to induce down-regulation of IFNAR1 expression was found to be significantly diminished in this context. FK009 and PDTC had no obvious effect on the expression of CK1α, however, SP600125 significantly reduced the expression of CK1α in the presence of TNF-α. SiHa cells treated with TNF-α showed reduced sensitivity to Cisplatin and exhibited higher cell viability, while the sensitivity of SiHa cells to Cisplatin was restored after treatment with CK1α inhibitor D4476. Additionally, we constructed a TNF-α overexpressing SiHa cell line and a transplanted tumor model. The results were similar to those of in vitro efficacy. We demonstrate that TNF-α-induced down-regulation of type I interferon receptor contributes to acquired resistance of cervical squamous cancer to Cisplatin.
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Affiliation(s)
- Yani Yu
- Department of Gynecology, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zibo, 255036, Shandong, China
| | - Jia Yu
- Department of Gynecology, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zibo, 255036, Shandong, China.
| | - Xiaorong Cui
- Department of Gynecology, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zibo, 255036, Shandong, China
| | - Xin Sun
- Department of Gynecology, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zibo, 255036, Shandong, China
| | - Xiaohui Yu
- Department of Gynecology, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zibo, 255036, Shandong, China
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Kaur Jawanda I, Soni T, Kumari S, Prabha V. Deciphering the potential of proteomic-based biomarkers in women's reproductive diseases: empowering precision medicine in gynecology. Biomarkers 2024; 29:7-17. [PMID: 38252065 DOI: 10.1080/1354750x.2024.2308827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
CONTEXT Gynecological disorders represent a complex set of malignancies that result from a diverse array of molecular changes affecting the lives of over a million women worldwide. Ovarian, Endometrial, and Cervical cancers, Endometriosis, PCOS are the most prevalent ones that pose a grave threat to women's health. Proteomics has emerged as an invaluable tool for developing novel biomarkers, screening methods, and targeted therapeutic agents for gynecological disorders. Some of these biomarkers have been approved by the FDA, but regrettably, they have a constrained diagnostic accuracy in early-stage diagnosis as all of these biomarkers lack sensitivity and specificity. Lately, high-throughput proteomics technologies have made significant strides, allowing for identification of potential biomarkers with improved sensitivity and specificity. However, limited successes have been shown with translation of these discoveries into clinical practice. OBJECTIVE This review aims to provide a comprehensive overview of the current and potential protein biomarkers for gynecological cancers, endometriosis and PCOS, discusses recent advances and challenges, and highlights future directions for the field. CONCLUSION We propose that proteomics holds great promise as a powerful tool to revolutionize the fight against female reproductive diseases and can ultimately improve personalized patient outcomes in women's biomedicine.
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Affiliation(s)
| | - Thomson Soni
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Seema Kumari
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Vijay Prabha
- Department of Microbiology, Panjab University, Chandigarh, India
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He Z, Chen R, Hu S, Zhang Y, Liu Y, Li C, Lv F, Xiao Z. The value of HPV genotypes combined with clinical indicators in the classification of cervical squamous cell carcinoma and adenocarcinoma. BMC Cancer 2022; 22:776. [PMID: 35840910 PMCID: PMC9288053 DOI: 10.1186/s12885-022-09826-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022] Open
Abstract
Background To investigate the differences in HPV genotypes and clinical indicators between cervical squamous cell carcinoma and adenocarcinoma and to identify independent predictors for differentiating cervical squamous cell carcinoma and adenocarcinoma. Methods A total of 319 patients with cervical cancer, including 238 patients with squamous cell carcinoma and 81 patients with adenocarcinoma, were retrospectively analysed. The clinical characteristics and laboratory indicators, including HPV genotypes, SCCAg, CA125, CA19-9, CYFRA 21–1 and parity, were analysed by univariate and multivariate analyses, and a classification model for cervical squamous cell carcinoma and adenocarcinoma was established. The model was validated in 96 patients with cervical cancer. Results There were significant differences in SCCAg, CA125, CA19-9, CYFRA 21–1, HPV genotypes and clinical symptoms between cervical squamous cell carcinoma and adenocarcinoma (P < 0.05). Logistic regression analysis showed that SCCAg and HPV genotypes (high risk) were independent predictors for differentiating cervical squamous cell carcinoma from adenocarcinoma. The AUC value of the established classification model was 0.854 (95% CI: 0.804–0.904). The accuracy, sensitivity and specificity of the model were 0.846, 0.691 and 0.899, respectively. The classification accuracy was 0.823 when the model was verified. Conclusion The histological type of cervical cancer patients with persistent infection of high-risk HPV subtypes and low serum SCCAg levels was more prone to being adenocarcinoma. When the above independent predictors occur, the occurrence and development of cervical adenocarcinoma should be anticipated, and early active intervention treatment should be used to improve the prognosis and survival of patients.
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Affiliation(s)
- Zhimin He
- State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China.,Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing, China
| | - Rongsheng Chen
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Shangying Hu
- Department of Gynecology and Obstetrics, the University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China
| | - Yajiao Zhang
- College of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Yang Liu
- State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China.,Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing, China.,Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Chengwei Li
- State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China.,Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing, China
| | - Fajin Lv
- State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China. .,Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing, China. .,Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China. .,Institute of Medical Data, Chongqing Medical University, Chongqing, 400016, China.
| | - Zhibo Xiao
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
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Squamous Cell Carcinoma Antigen: Clinical Application and Research Status. Diagnostics (Basel) 2022; 12:diagnostics12051065. [PMID: 35626221 PMCID: PMC9139199 DOI: 10.3390/diagnostics12051065] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 02/04/2023] Open
Abstract
The squamous cell carcinoma antigen (SCCA) is a tumor marker that has gained increasing attention for its biological functions and significance in normal physiological and pathological processes. Not only SCCA but also circulating immune complexes of SCCA and immunoglobulin M (IgM) are involved in normal physiological and pathological processes, providing a background for numerous clinical studies aimed at assessing the potential role of SCCA, SCCA–IgM, and SCCA isoform complexes in clinical practice. Previous studies support the clinical value of SCCA as a tumor marker for either diagnosing squamous cancers or monitoring the response to radiotherapy or chemotherapy, tumor relapse, and treatment failure. However, these studies show contrasting results, making the diagnostic or prognostic value of SCCA controversial. To reduce clinical heterogeneity across studies and achieve a more accurate and reliable comparison of results, a standardized detection method, scoring system, and cutoff level need to be established. Moreover, despite the fact that performances of different methods are comparable, the dynamic observation of tumor marker kinetics should be conducted under the same method.
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Fatica EM, Larson BJ, Algeciras-Schimnich A, Bornhorst JA. Performance characteristics of the BRAHMS KRYPTOR automated squamous cell carcinoma antigen assay. J Immunol Methods 2022; 504:113257. [PMID: 35304118 DOI: 10.1016/j.jim.2022.113257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Squamous cell carcinoma antigen (SCCA) is a glycoprotein biomarker for squamous cell carcinoma (SCC). SCCA elevations have also been noted in other conditions. The purpose of this study was to evaluate the analytical and clinical performance of an automated SCCA homogenous immunofluorescent assay (BRAHMS KRYPTOR). METHODS Reference intervals were determined using 119 samples from healthy donors. To assess clinical performance, samples were collected from patients with cervical (n = 12), head and neck (n = 23), lung (n = 14), or cutaneous (n = 11) SCC in addition to hepatocellular carcinoma, psoriasis, or atopic dermatitis. RESULTS Upper 95th percentile sex-specific reference intervals were 2.00 μg/L for males and 1.67 μg/L for females. Intra- and inter-assay CVs were less than 5%. Comparison of the BRAHMS KRYPTOR to an ELISA SCCA immunoassay exhibited a correlation coefficient of 0.8809. The mean sensitivity for all SCC positive patients was 23.3%. With the exception of psoriasis (58.6%) specificity exceeded 95% for the non-SCC populations. CONCLUSION The BRAHMS KRYPTOR SCCA assay showed good analytical performance and acceptable overall clinical specificity. Consistent with previous studies, the sensitivity of SCCA for SCC was low. In the absence of other robust circulating markers, SCCA remains an imperfect yet useful tool in the evaluation of SCC.
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Affiliation(s)
- Erica M Fatica
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA; Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Bethany J Larson
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | | | - Joshua A Bornhorst
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
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He B, Chen W, Liu L, Hou Z, Zhu H, Cheng H, Zhang Y, Zhan S, Wang S. Prediction Models for Prognosis of Cervical Cancer: Systematic Review and Critical Appraisal. Front Public Health 2021; 9:654454. [PMID: 34026714 PMCID: PMC8137851 DOI: 10.3389/fpubh.2021.654454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/23/2021] [Indexed: 12/23/2022] Open
Abstract
Objective: This work aims to systematically identify, describe, and appraise all prognostic models for cervical cancer and provide a reference for clinical practice and future research. Methods: We systematically searched PubMed, EMBASE, and Cochrane library databases up to December 2020 and included studies developing, validating, or updating a prognostic model for cervical cancer. Two reviewers extracted information based on the CHecklist for critical Appraisal and data extraction for systematic Reviews of prediction Modeling Studies checklist and assessed the risk of bias using the Prediction model Risk Of Bias ASsessment Tool. Results: Fifty-six eligible articles were identified, describing the development of 77 prognostic models and 27 external validation efforts. The 77 prognostic models focused on three types of cervical cancer patients at different stages, i.e., patients with early-stage cervical cancer (n = 29; 38%), patients with locally advanced cervical cancer (n = 27; 35%), and all-stage cervical cancer patients (n = 21; 27%). Among the 77 models, the most frequently used predictors were lymph node status (n = 57; 74%), the International Federation of Gynecology and Obstetrics stage (n = 42; 55%), histological types (n = 38; 49%), and tumor size (n = 37; 48%). The number of models that applied internal validation, presented a full equation, and assessed model calibration was 52 (68%), 16 (21%), and 45 (58%), respectively. Twenty-four models were externally validated, among which three were validated twice. None of the models were assessed with an overall low risk of bias. The Prediction Model of Failure in Locally Advanced Cervical Cancer model was externally validated twice, with acceptable performance, and seemed to be the most reliable. Conclusions: Methodological details including internal validation, sample size, and handling of missing data need to be emphasized on, and external validation is needed to facilitate the application and generalization of models for cervical cancer.
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Affiliation(s)
- Bingjie He
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Weiye Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Lili Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Zheng Hou
- Department of Obsterics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Haiyan Zhu
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Haozhe Cheng
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Yixi Zhang
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Siyan Zhan
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Shengfeng Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
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Li T, Huang H, Hu Y, Chen H, Li R, Lu H, Yan L, Chen Y, Zhang C, Zhang Q, Li X. Rs2686344 and serum squamous cell carcinoma antigen could predict clinical efficacy of neoadjuvant chemotherapy for cervical cancer. Curr Probl Cancer 2021; 45:100755. [PMID: 33902928 DOI: 10.1016/j.currproblcancer.2021.100755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/25/2021] [Accepted: 04/02/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To evaluate the predictive value of a single nucleotide polymorphism (SNP) rs2686344 and squamous cell carcinoma antigen (SCCAg) levels in the clinical efficacy of neoadjuvant chemotherapy (NACT) for cervical cancer. METHODS A total of 92 patients with stage IB2-IIIB carcinoma of the uterine cervix who received NACT treatment were enrolled. The relationship between the genotypes of SNP rs2686344 which is located on CAMKK2 on chromosome 12, SCCAg levels and the response to NACT was analyzed. The relationship between the SNP rs2686344 genotypes, SCCAg levels, the response to NACT and the five-year survival rate was evaluated. RESULTS The effective group accounted for 84.85% in patients with low level (≤3.5 ng/mL) of post-treatment SCCAg (post-SCCAg), while the ineffective group accounted for 15.15%. The post-SCCAg levels and the genotypes of rs2686344 were significantly correlated with NACT response (P = 0.003, and P = 0.006). In patients with CC or CT genotype of SNP rs2686344, effective group accounted for 81.18%, while ineffective group accounted for 18.82%; For patients with TT genotype, effective response group accounted for 28.57%, ineffective group accounted for 71.43%. Post-SCCAg level >3.5 ng/mL and TT genotype of SNP rs2686344 showed as independent risk factors for NACT response in the multivariate analysis (P = 0.002, and P = 0.048). There was no significant difference in 5-year overall survival and 5-year disease-free survival between patients with different levels of post-SCCAg, or among different rs2686344 genotypes. CONCLUSION The high level of post-SCCAg (>3.5 ng/mL) and TT genotype of rs2686344 may suggest a higher risk of poor response to NACT.
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Affiliation(s)
- Ting Li
- School of Medicine, Jianghan University, Wuhan, P.R.China; Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Jianghan University, Wuhan, P.R. China
| | - Huan Huang
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Yi Hu
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Hongwei Chen
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Rui Li
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Hao Lu
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Lin Yan
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Ying Chen
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Chun Zhang
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Qinghua Zhang
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Xiong Li
- Department of Gynecology & Obstetrics, the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China.
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Onyango CG, Ogonda L, Guyah B, Shiluli C, Ganda G, Orang'o OE, Patel K. Novel biomarkers with promising benefits for diagnosis of cervical neoplasia: a systematic review. Infect Agent Cancer 2020; 15:68. [PMID: 33292364 PMCID: PMC7670699 DOI: 10.1186/s13027-020-00335-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/04/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Cervical cancer screening is slowly transitioning from Pappanicolaou cytologic screening to primary Visual Inspection with Acetic Acid (VIA) or HPV testing as an effort to enhance early detection and treatment. However, an effective triage tests needed to decide who among the VIA or HPV positive women should receive further diagnostic evaluation to avoid unnecessary colposcopy referrals is still lacking. Evidence from experimental studies have shown potential usefulness of Squamous Cell Carcinoma Antigen (SCC Ag), Macrophage Colony Stimulating Factor (M-CSF), Vascular Endothelial Growth Factor (VEGF), MicroRNA, p16INKa / ki-67, HPV E6/E7/mRNA, and DNA methylation biomarkers in detecting premalignant cervical neoplasia. Given the variation in performance, and scanty review studies in this field, this systematic review described the diagnostic performance of some selected assays to detect high-grade cervical intraepithelial neoplasia (CIN2+) with histology as gold standard. METHODS We systematically searched articles published in English between 2012 and 2020 using key words from PubMed/Medline and SCOPUS with two reviewers assessing study eligibility, and risk of bias. We performed a descriptive presentation of the performance of each of the selected assays for the detection of CIN2 + . RESULTS Out of 298 citations retrieved, 58 articles were included. Participants with cervical histology yielded CIN2+ proportion range of 13.7-88.4%. The diagnostic performance of the assays to detect CIN2+ was; 1) SCC-Ag: range sensitivity of 78.6-81.2%, specificity 74-100%. 2) M-CSF: sensitivity of 68-87.7%, specificity 64.7-94% 3) VEGF: sensitivity of 56-83.5%, specificity 74.6-96%. 4) MicroRNA: sensitivity of 52.9-67.3%, specificity 76.4-94.4%. 5) p16INKa / ki-67: sensitivity of 50-100%, specificity 39-90.4%. 6) HPV E6/E7/mRNA: sensitivity of 65-100%, specificity 42.7-90.2%, and 7) DNA methylation: sensitivity of 59.7-92.9%, specificity 67-98%. CONCLUSION Overall, the reported test performance and the receiving operating characteristics curves implies that implementation of p16ink4a/ki-67 assay as a triage for HPV positive women to be used at one visit with subsequent cryotherapy treatment is feasible. For the rest of assays, more robust clinical translation studies with larger consecutive cohorts of women participants is recommended.
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Affiliation(s)
- Calleb George Onyango
- Department of Biomedical Sciences and Technology, Maseno University, P.O Box Private Bag, Maseno, Kenya.
| | - Lilian Ogonda
- Department of Biomedical Sciences and Technology, Maseno University, P.O Box Private Bag, Maseno, Kenya
| | - Bernard Guyah
- Department of Biomedical Sciences and Technology, Maseno University, P.O Box Private Bag, Maseno, Kenya
| | - Clement Shiluli
- Department of Biomedical Sciences and Technology, Maseno University, P.O Box Private Bag, Maseno, Kenya
| | - Gregory Ganda
- Department of Clinical Services, Division of Gynecology / Oncology, Jaramogi Oginga Odinga Teaching and Referral Hospital (JOOTRH), P.O Box 849, Kisumu, Kenya
| | - Omenge Elkanah Orang'o
- Department of Reproductive Health, Division of Gynecology / Oncology, Moi University, P. O Box 4606, Eldoret, Kenya
| | - Kirtika Patel
- Department of Immunology, Moi University, P.O Box 4606, Eldoret, Kenya
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