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Padhye BD, Nawaz U, Hains PG, Reddel RR, Robinson PJ, Zhong Q, Poulos RC. Proteomic insights into paediatric cancer: Unravelling molecular signatures and therapeutic opportunities. Pediatr Blood Cancer 2024; 71:e30980. [PMID: 38556739 DOI: 10.1002/pbc.30980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 04/02/2024]
Abstract
Survival rates in some paediatric cancers have improved greatly over recent decades, in part due to the identification of diagnostic, prognostic and predictive molecular signatures, and the development of risk-directed therapies. However, other paediatric cancers have proved difficult to treat, and there is an urgent need to identify novel biomarkers that reveal therapeutic opportunities. The proteome is the total set of expressed proteins present in a cell or tissue at a point in time, and is vastly more dynamic than the genome. Proteomics holds significant promise for cancer research, as proteins are ultimately responsible for cellular phenotype and are the target of most anticancer drugs. Here, we review the discoveries, opportunities and challenges of proteomic analyses in paediatric cancer, with a focus on mass spectrometry (MS)-based approaches. Accelerating incorporation of proteomics into paediatric precision medicine has the potential to improve survival and quality of life for children with cancer.
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Affiliation(s)
- Bhavna D Padhye
- Cancer Centre for Children, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
- Kids Research, Children's Cancer Research Unit, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Urwah Nawaz
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
| | - Peter G Hains
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
| | - Roger R Reddel
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
| | - Phillip J Robinson
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
| | - Qing Zhong
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
| | - Rebecca C Poulos
- ProCan, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, New South Wales, Australia
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Silva VAR, Pauna HF, Lavinsky J, Hyppolito MA, Vianna MF, Leal M, Massuda ET, Hamerschmidt R, Bahmad F, Cal RV, Sampaio ALL, Felix F, Chone CT, Castilho AM. Task force Guideline of Brazilian Society of Otology ‒ hearing loss in children - Part I ‒ Evaluation. Braz J Otorhinolaryngol 2022; 89:159-189. [PMID: 36529647 PMCID: PMC9874360 DOI: 10.1016/j.bjorl.2022.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES To provide an overview of the main evidence-based recommendations for the diagnosis of hearing loss in children and adolescents aged 0 to 18 years. METHODS Task force members were educated on knowledge synthesis methods, including electronic database search, review and selection of relevant citations, and critical appraisal of selected studies. Articles written in English or Portuguese on childhood hearing loss were eligible for inclusion. The American College of Physicians' guideline grading system and the American Thyroid Association's guideline criteria were used for critical appraisal of evidence and recommendations for therapeutic interventions. RESULTS The evaluation and diagnosis of hearing loss: universal newborn hearing screening, laboratory testing, congenital infections (especially cytomegalovirus), genetic testing and main syndromes, radiologic imaging studies, vestibular assessment of children with hearing loss, auditory neuropathy spectrum disorder, autism spectrum disorder, and noise-induced hearing loss. CONCLUSIONS Every child with suspected hearing loss has the right to diagnosis and appropriate treatment if necessary. This task force considers 5 essential rights: (1) Otolaryngologist consultation; (2) Speech assessment and therapy; (3) Diagnostic tests; (4) Treatment; (5) Ophthalmologist consultation.
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Affiliation(s)
- Vagner Antonio Rodrigues Silva
- Universidade Estadual de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Campinas, SP, Brazil.
| | - Henrique Furlan Pauna
- Hospital Universitário Cajuru, Departamento de Otorrinolaringologia, Curitiba, PR, Brazil
| | - Joel Lavinsky
- Universidade Federal do Rio Grande do Sul (UFRGS), Departamento de Cirurgia, Porto Alegre, RS, Brazil
| | - Miguel Angelo Hyppolito
- Universidade de São Paulo (USP), Faculdade de Medicina de Ribeirão Preto, Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Ribeirão Preto, SP, Brazil
| | - Melissa Ferreira Vianna
- Irmandade Santa Casa de Misericórdia de São Paulo, Departamento de Otorrinolaringologia, São Paulo, SP, Brazil
| | - Mariana Leal
- Universidade Federal de Pernambuco (UFPE), Departamento de Cirurgia, Recife, PE, Brazil
| | - Eduardo Tanaka Massuda
- Universidade de São Paulo (USP), Faculdade de Medicina de Ribeirão Preto, Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Ribeirão Preto, SP, Brazil
| | - Rogério Hamerschmidt
- Universidade Federal do Paraná (UFPR), Hospital de Clínicas, Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Curitiba, PR, Brazil
| | - Fayez Bahmad
- Universidade de Brasília (UnB), Programa de Pós-Graduação em Ciências da Saúde, Brasília, DF, Brazil; Instituto Brasiliense de Otorrinolaringologia (IBO), Brasília, DF, Brazil
| | - Renato Valério Cal
- Centro Universitário do Estado do Pará (CESUPA), Departamento de Otorrinolaringologia, Belém, PA, Brazil
| | - André Luiz Lopes Sampaio
- Universidade de Brasília (UnB), Faculdade de Medicina, Laboratório de Ensino e Pesquisa em Otorrinolaringologia, Brasília, DF, Brazil
| | - Felippe Felix
- Universidade Federal do Rio de Janeiro (UFRJ), Hospital Universitário Clementino Fraga Filho (HUCFF), Departamento de Otorrinolaringologia, Rio de Janeiro, RJ, Brazil
| | - Carlos Takahiro Chone
- Universidade Estadual de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Campinas, SP, Brazil
| | - Arthur Menino Castilho
- Universidade Estadual de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Campinas, SP, Brazil
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Bradford N, Pitt E, Rumble S, Cashion C, Lockwood L, Alexander K. Persistent Symptoms, Quality of Life, and Correlates with Health Self-Efficacy in Adolescent and Young Adult Survivors of Childhood Cancer. J Adolesc Young Adult Oncol 2021; 11:410-418. [PMID: 34582267 DOI: 10.1089/jayao.2021.0104] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Purpose: The numbers of adolescent and young adult (AYA) survivors of childhood cancer are exponentially growing. To ensure suitable services are available to meet the needs of this growing population, understanding the experience of late effects, quality of life, and potentially modifiable factors, such as self-efficacy, is required. Methods: AYA survivors of childhood cancer recruited through an After Cancer Therapy Service at a Children's Hospital rated their symptoms experience, quality of life, and self-efficacy using the Patient Reported Outcome Common Terminology Criteria for Adverse Events, Functional Assessment of Cancer Therapy-General (FACT-G), and Patient-Reported Outcomes Measurement Information System (PROMIS®), respectively. Descriptive statistics were used to characterize the sample. Quality-of-life scores were compared with population norms. Regression analyses were used to explore the relationships between symptom experience, quality of life, and self-efficacy. Results: Thirty participants (mean age 22 ± 4.4 years) reported an average of nine symptoms as persistently experienced at moderate or higher rated intensity among participants (standard deviation ±8.7; range: 0-32; interquartile range: 2-16); over half (n = 17, 56.7%) had finished treatment 10 or more years ago. Participants scored lower on the FACT-G Physical Well-being and Emotional Well-being, and higher on Social Well-being subscales than the general population. Around two-thirds of participants were confident in their ability to self-manage their health based on their health self-efficacy score. Bivariate linear regression identified a statistically significant increase in the overall quality of life with increased self-efficacy, adjusted for age and sex (0.60, 95% confidence interval [CI] 0.30-0.90, p < 0.01). Higher symptom burden was associated with a lower overall quality of life after adjusting for age and sex (-0.95, 95% CI: -1.35 to -0.54, p < 0.001). Conclusion: Young cancer survivors experience a substantial number of persistent symptoms related to their cancer treatment that may negatively impact aspects of their quality of life. Health self-efficacy is a potential target for future interventions.
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Affiliation(s)
- Natalie Bradford
- School of Nursing, Faculty of Health, Queensland University of Technology, Brisbane, Australia.,Cancer and Palliative Care Outcomes Centre at Centre for Children's Health Research, Faculty of Health, Queensland University of Technology, Brisbane, Australia
| | - Erin Pitt
- School of Nursing, Faculty of Health, Queensland University of Technology, Brisbane, Australia.,Cancer and Palliative Care Outcomes Centre at Centre for Children's Health Research, Faculty of Health, Queensland University of Technology, Brisbane, Australia
| | - Shelley Rumble
- Oncology Services Group, Queensland Children's Hospital, Children's Health Queensland Hospital and Health Service, South Brisbane, Australia
| | - Christine Cashion
- Oncology Services Group, Queensland Children's Hospital, Children's Health Queensland Hospital and Health Service, South Brisbane, Australia
| | - Liane Lockwood
- Oncology Services Group, Queensland Children's Hospital, Children's Health Queensland Hospital and Health Service, South Brisbane, Australia
| | - Kimberly Alexander
- School of Nursing, Faculty of Health, Queensland University of Technology, Brisbane, Australia.,Cancer and Palliative Care Outcomes Centre at Centre for Children's Health Research, Faculty of Health, Queensland University of Technology, Brisbane, Australia
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Penson A, van Deuren S, Bronkhorst E, Keizer E, Heskes T, Coenen MJH, Rosmalen JGM, Tissing WJE, van der Pal HJH, de Vries ACH, van den Heuvel-Eibrink MM, Neggers S, Versluys BAB, Louwerens M, van der Heiden-van der Loo M, Pluijm SMF, Grootenhuis M, Blijlevens N, Kremer LCM, van Dulmen-den Broeder E, Knoop H, Loonen J. Methodology of the DCCSS later fatigue study: a model to investigate chronic fatigue in long-term survivors of childhood cancer. BMC Med Res Methodol 2021; 21:106. [PMID: 33993873 PMCID: PMC8127233 DOI: 10.1186/s12874-021-01298-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/27/2021] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND A debilitating late effect for childhood cancer survivors (CCS) is cancer-related fatigue (CRF). Little is known about the prevalence and risk factors of fatigue in this population. Here we describe the methodology of the Dutch Childhood Cancer Survivor Late Effect Study on fatigue (DCCSS LATER fatigue study). The aim of the DCCSS LATER fatigue study is to examine the prevalence of and factors associated with CRF, proposing a model which discerns predisposing, triggering, maintaining and moderating factors. Triggering factors are related to the cancer diagnosis and treatment during childhood and are thought to trigger fatigue symptoms. Maintaining factors are daily life- and psychosocial factors which may perpetuate fatigue once triggered. Moderating factors might influence the way fatigue symptoms express in individuals. Predisposing factors already existed before the diagnosis, such as genetic factors, and are thought to increase the vulnerability to develop fatigue. Methodology of the participant inclusion, data collection and planned analyses of the DCCSS LATER fatigue study are presented. RESULTS Data of 1955 CCS and 455 siblings was collected. Analysis of the data is planned and we aim to start reporting the first results in 2022. CONCLUSION The DCCSS LATER fatigue study will provide information on the epidemiology of CRF and investigate the role of a broad range of associated factors in CCS. Insight in associated factors for fatigue in survivors experiencing severe and persistent fatigue may help identify individuals at risk for developing CRF and may aid in the development of interventions.
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Affiliation(s)
- Adriaan Penson
- Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - Sylvia van Deuren
- Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ewald Bronkhorst
- Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ellen Keizer
- Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Tom Heskes
- Institute for Computing and Information Sciences, Radboud University, Nijmegen, The Netherlands
| | - Marieke J H Coenen
- Department of Human Genetics, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Judith G M Rosmalen
- Interdisciplinary Center Psychopathology and Emotion Regulation (ICPE), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Wim J E Tissing
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Pediatric Oncology/Hematology, Beatrix Children's Hospital/University of Groningen/University Medical Center Groningen, Groningen, The Netherlands
| | | | - Andrica C H de Vries
- Department of Pediatric Oncology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Marry M van den Heuvel-Eibrink
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Pediatric Oncology, Erasmus Medical Center - Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Sebastian Neggers
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Medicine, section Endocrinology, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Marloes Louwerens
- Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Saskia M F Pluijm
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Martha Grootenhuis
- Department of Psychology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Nicole Blijlevens
- Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Leontien C M Kremer
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department Pediatric Oncology, Emma Children's Hospital, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Hans Knoop
- Department of Medical Psychology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam Public health research institute, Amsterdam, Netherlands
| | - Jacqueline Loonen
- Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
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Peak Oxygen Uptake and Exercise Capacity of Children Undergoing Leukemia Treatment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17238732. [PMID: 33255428 PMCID: PMC7727809 DOI: 10.3390/ijerph17238732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/14/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022]
Abstract
The aim of the study was to assess the exercise capacity (VO2peak) of children undergoing leukemia treatment and to compare the results with healthy children. Furthermore, we assessed the influence of treatment methods on the level of exercise capacity and the increase in sedentary behaviors. The study comprised 21 children (12 boys and 9 girls) undergoing treatment for acute lymphoblastic leukemia (ALL) (n = 13) and acute myeloid leukemia (AML) (n = 8). The subjects were aged 7-13 years (mean age 10.7, SD 2.0 years). Cardiorespiratory fitness was assessed by using the ergospirometry test. Progressive Godfrey protocol was performed. The level of physical activity was assessed by using the questions from the Health Behavior in School-Aged Children (HBSC 2018) questionnaire. The study results showed that children undergoing leukemia treatment were characterized by a reduced level of exercise capacity. The measured value of VO2peak in the group of treated children was, on average, 22.16 mL·kg-1·min-1. The mean values of VO2peak predicted for this age group were 45.48 mL·kg-1·min-1 (SD, 3.8). The measured value of VO2peak in the study group with the division into age groups was, on average, 21.21 mL·kg-1·min-1 in the group of children aged 7-10 years. In the group of children aged 11-13 years, this parameter was 22.64 mL·kg-1·min-1. Lack of physical activity and failure to meet the standards for the minimum level of weekly physical activity (MVPA index-moderate-to-vigorous physical activity) probably contribute to the deterioration in exercise capacity level of cancer-treated children.
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Skiba MB, McElfresh JJ, Howe CL, Crane TE, Kopp LM, Jacobs ET, Thomson CA. Dietary Interventions for Adult Survivors of Adolescent and Young Adult Cancers: A Systematic Review and Narrative Synthesis. J Adolesc Young Adult Oncol 2020; 9:315-327. [DOI: 10.1089/jayao.2019.0105] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Meghan B. Skiba
- Department of Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
| | - Jennifer J. McElfresh
- Department of Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
| | - Carol L. Howe
- University of Arizona Health Sciences Library, University of Arizona, Tucson, Arizona, USA
| | - Tracy E. Crane
- Department of Biobehavioral Sciences, College of Nursing, University of Arizona, Tucson, Arizona, USA
| | - Lisa M. Kopp
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
| | - Elizabeth T. Jacobs
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
| | - Cynthia A. Thomson
- Department of Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
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Shaheen N, Jan MRU, Riaz S, Khan MS. Late Morbidity among Survivors of Childhood Cancers; Experience at Tertiary Care Cancer Hospital. JOURNAL OF CANCER & ALLIED SPECIALTIES 2020; 6:e351. [PMID: 37197606 PMCID: PMC10166322 DOI: 10.37029/jcas.v6i2.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/12/2020] [Indexed: 05/19/2023]
Abstract
Background Long-term survivors of childhood malignancies are at increased risk of experiencing treatment-related morbidities. Survival into late adulthood in these children provides ample time for the acquisition of long-term sequelae. This study aimed to determine the late adverse effects among long-term survivors of childhood cancer from a low-income country perspective. Materials and Methods Data were retrospectively collected from review of charts of patients aged under 18 years at the time of their primary diagnosis between 1 January, 1995, and 31 December, 2008, and who survived for at least 5 years after completion of their treatment. Analysed data included demographics, cancer type, treatment modality, types of chemotherapy agents administered and specific late morbidities including frequency of azoospermia, oligospermia, endocrine abnormalities, hearing and pulmonary function impairment and cardiac dysfunction among the long-term survivors of cancer. Results The total number of patients was 300 with a mean age of 18 ± 2 years. The male to female ratio was 2.7:1. Median follow-up duration was 18 years (range: 5-25 years). Seventy-seven percent of patients were from Punjab, 20% were from Khyber Pakhtunkhwa and 3% were from other provinces. Fifty percent had a diagnosis of Hodgkin lymphoma, 17% had acute lymphoblastic leukaemia, 13% had non-Hodgkin lymphoma, 10% had germ cell tumours and 10% had other tumours. Fifty-seven percent received chemotherapy, 23% had chemotherapy and radiotherapy, 15% had chemotherapy and surgery, 3% had chemotherapy, surgery and radiotherapy and 2% had only surgery. Notable long-term documented sequelae were; azoospermia/oligospermia in 64%, endocrine abnormalities in 25% with hypothyroidism in 13.5% and follicle-stimulating hormone and luteinizing hormone abnormalities in 11.5%, ototoxicity in 6.5%, impaired pulmonary function tests in 4.6%, cardiotoxicity in 2.4% and second malignancies (acute myeloid leukaemia and myelodysplastic syndrome) in 1%. Conclusion Childhood cancer survivors are at increased risk of adverse treatment-related sequelae and a long-term follow-up plan should be in place in centres where they receive treatment for their primary disease.
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Affiliation(s)
- Najma Shaheen
- Department of Pediatric Oncology, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
| | - Mir Rooh Ullah Jan
- Department of Pediatric Oncology, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
| | - Shazia Riaz
- Department of Pediatric Oncology, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
| | - Muhammad Saghir Khan
- Department of Pediatric Oncology, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
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Kim SY, Cho GJ, Davis JS. Consequences of chemotherapeutic agents on primordial follicles and future clinical applications. Obstet Gynecol Sci 2019; 62:382-390. [PMID: 31777733 PMCID: PMC6856479 DOI: 10.5468/ogs.2019.62.6.382] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/12/2019] [Accepted: 05/22/2019] [Indexed: 12/16/2022] Open
Abstract
The ovarian reserve is necessary for female fertility and endocrine health. Commonly used cancer therapies diminish the ovarian reserve, thus, resulting in primary ovarian insufficiency, which clinically presents as infertility and endocrine dysfunction. Prepubertal children who have undergone cancer therapies often experience delayed puberty or cannot initiate puberty and require endocrine support to maintain a normal life. Thus, developing an effective intervention to prevent loss of the ovarian reserve is an unmet need for these cancer patients. The selection of adjuvant therapies to protect the ovarian reserve against cancer therapies underlies the mechanism of loss of primordial follicles (PFs). Several theories have been proposed to explain the loss of PFs. The "burn out" theory postulates that chemotherapeutic agents activate dormant PFs through an activation pathway. Another theory posits that chemotherapeutic agents destroy PFs through an "apoptotic pathway" due to high sensitivity to DNA damage. However, the mechanisms causing loss of the ovarian reserve remains largely speculative. Here, we review current literature in this area and consider the mechanisms of how gonadotoxic therapies deplete PFs in the ovarian reserve.
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Affiliation(s)
- So-Youn Kim
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Geum Joon Cho
- Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Korea
| | - John S. Davis
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, USA
- VA Nebraska Western Iowa Health Care System, Omaha, NE, USA
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