Mei Ling Lietsch

Ms. Mei Ling Lietsch

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Verified
Journal Article
Open access
PDF file
YKYvonne Kellar-Guenther
Yvonne Kellar-Guenther
LBLauren Barringer
Lauren Barringer
KRKatherine Lynn Raboin
Katherine Lynn Raboin
GNGinger Nichols
Ginger Nichols
KCKathy YF Chou
Kathy YF Chou
MSMarci Sontag
Marci Sontag
Newborn screening (NBS) is hailed as a public health success, but little is known about the long-term outcomes following a positive newborn screen. There has been difficulty gathering long-term follow-up (LTFU) data consistently, reliably, and with minimal effort. Six programs developed and tested a core set of minimal LTFU data elements. After an iterative data collection process and the development of a data collection tool, the group agreed on the minimal LTFU data elements. The denominator captured all infants with an NBS diagnosis, accounting for children who moved or died prior to the follow-up year. They also agreed on three LTFU outcomes: if the child was still alive, had contact with a specialist, and received appropriate care specific to their diagnosis within the year. The six programs representing NBS public health programs, clinical providers, and research programs provided data across multiple NBS disorders. In 2022, 83.8% (563/672) of the children identified by the LTFU programs were alive and living in the jurisdiction; of those, 92.0% (518/563) saw a specialist, and 87.7% (494/563) received appropriate care. The core LTFU data elements can be applied as a foundation to address the impact of early diagnosis by NBS within and across jurisdictions.

Verified
Journal Article
Open access
PDF file
MLMei Ling Lietsch
Mei Ling Lietsch
KCKee Chan
Kee Chan
JTJennifer Taylor
Jennifer Taylor
BLBo Hoon Lee
Bo Hoon Lee
ECEmma Ciafaloni
Emma Ciafaloni
Amy BrowerAmy Brower
Amy Brower
In the United States and around the world, newborns are screened on a population basis for conditions benefiting from pre-symptomatic diagnosis and treatment. The number of screened conditions continues to expand as novel technologies for screening, diagnosing, treating, and managing disease are discovered. While screening all newborns facilitates early diagnosis and treatment, most screened conditions are treatable but not curable. Patients identified by newborn screening often require lifelong medical management and community support to achieve the best possible outcome. To advance the long-term follow-up of infants identified through newborn screening (NBS), the Long-Term Follow-up Cares and Check Initiative (LTFU-Cares and Check) designed, implemented, and evaluated a system of longitudinal data collection and annual reporting engaging parents, clinical providers, and state NBS programs. The LTFU-Cares and Check focused on newborns identified with spinal muscular atrophy (SMA) through NBS and the longitudinal health information prioritized by parents and families. Pediatric neurologists who care for newborns with SMA entered annual data, and data tracking and visualization tools were delivered to state NBS programs with a participating clinical center. In this publication, we report on the development, use of, and preliminary results from the LTFU-Cares and Check Initiative, which was designed as a comprehensive model of LTFU. We also propose next steps for achieving the goal of a national system of LTFU for individuals with identified conditions by meaningfully engaging public health agencies, clinicians, parents, families, and communities.

Verified
Journal Article
Open access
PDF file
Yekaterina UnnikumaranYekaterina Unnikumaran
Yekaterina Unnikumaran
MLMei Ling Lietsch
Mei Ling Lietsch
Amy BrowerAmy Brower
Amy Brower
From 2008 to 2024, the Newborn Screening Translational Research Network (NBSTRN), part of the National Institute of Child Health and Human Development (NICHD) Hunter Kelly Newborn Screening Program, served as a robust infrastructure to facilitate groundbreaking research in newborn screening (NBS), public health, rare disease, and genomics. Over its sixteen years, NBSTRN developed into a significant international network, supporting innovative research on novel technologies to screen, diagnose, treat, manage, and understand the natural history of more than 280 rare diseases. The NBSTRN tools and resources were used by a variety of stakeholders including researchers, clinicians, state NBS programs, parents, families, and policy makers. Resources and expertise for the newborn screening community in ethical, legal, and social issues (ELSI) has been an important area of focus for the NBSTRN and this includes efforts across the NBS system from pilot studies of candidate conditions to public health implementation of screening for new conditions, and the longitudinal follow-up of NBS-identified individuals to inform health outcomes and disease understanding. In 2023, the NBSTRN conducted a survey to explore ELSI issues in NBS research, specifically those encountered by the NBS community. Since NBS research involves collaboration among researchers, state NBS programs, clinicians, and families, the survey was broadly designed and disseminated to engage all key stakeholders. With responses from 88 members of the NBS community, including researchers and state NBS programs, the survey found that individuals rely most on institutional and collegial resources when they encounter ELSI questions. Most survey responses ranked privacy as extremely or very important in NBS research and identified the need for policies that address informed consent in NBS research. The survey results highlight the need for improved collaborative resources and educational programs focused on ELSI for the NBS community. The survey results inform future efforts in ELSI and NBS research in the United States (U.S.) and the rest of the world, including the development of policies and expanded ELSI initiatives and tools that address the needs of all NBS stakeholders.

Verified
Journal Article
Open access
PDF file
KSKamryn Sample
Kamryn Sample
MVMANJULA M Venkatappa
MANJULA M Venkatappa
YKYoung Do Koo
Young Do Koo
ZFZachary Foulks
Zachary Foulks
VNVingie Ng
Vingie Ng
VEVernat Exil
Vernat Exil
This study was conducted to investigate the impact of Virginia tobacco (VT), Menthol (MT), and sham aerosols on both normal and pathological responses in pregnant and non-pregnant mouse groups. Aerosol vaping exposure and body weight analysis were evaluated in pregnant and non-pregnant cohorts and compared with controls exposed to sham aerosols in each group. We assessed pulmonary inflammation using the Bronchoalveolar Lavage Fluid (BALF) total cell count, total protein, and lactate dehydrogenase (LDH) activity. In addition, we measured hepatic triglyceride levels and lipogenic genes in the liver, such as Scd1, Fasn, Srebp1c1, and the estrogen receptor (Esr1), via RT-qPCR and Western blot analysis. Liver fibrosis was assessed via histopathology and mitochondrial functional assays, and serum cytokines were measured in each group. In pregnant mice exposed to VT, pulmonary inflammation, increased cell counts and protein content, and no change in lactate dehydrogenase activity in Bronchoalveolar Lavage Fluid (BALF) were observed compared with non-pregnant mice. VT exposure appeared to cause direct adverse health outcomes leading to increased expression of liver lipogenic genes, such as Scd1, Fasn, Srebp1c, and estrogen receptors. Maternal liver lipid equilibrium was disrupted upon VT exposure. Vaping either VT or MT significantly reduced mitochondrial oxidative function in the livers of pregnant mice but not in those of non-pregnant mice. This study’s findings suggest that pregnancy may be associated with distinct immunological responses to VT and MT exposure. VT exposure was associated with altered hepatic lipogenic gene expression, suggesting potential metabolic effects on the maternal liver, whereas MT exposure was associated with liver structural changes and fibrosis-related outcomes.

24 April 2024 in Preprints.org
Verified
Preprint
Open access
PDF file
YKYvonne Kellar-Guenther
Yvonne Kellar-Guenther
LBLauren Barringer
Lauren Barringer
KRKatherine Lynn Raboin
Katherine Lynn Raboin
GNGinger Nichols
Ginger Nichols
KCKathy YF Chou
Kathy YF Chou
MSMarci Sontag
Marci Sontag
Newborn screening (NBS) is hailed as a public health success, but little is known about long-term outcomes following a positive newborn screen. There has been difficulty gathering long-term follow-up (LTFU) data consistently, reliably, and with minimal effort. Six programs developed and tested a core set of minimal LTFU data elements. After an iterative data collection process and the development of a data collection tool, the group agreed on minimal LTFU data elements. The denominator captured all infants with an NBS diagnosis, accounting for children who moved or died prior to the follow-up year. They also agreed on three LTFU outcomes: if the child was still alive, had contact with a specialist, and received appropriate care specific to their diagnosis within the year. The six programs representing NBS public health programs, clinical providers, and research programs provided data across multiple NBS disorders. In 2022, 83.8% (563/672) of the children identified by the LTFU programs were alive and living in the jurisdiction; of those, 92.0% (518/563) saw a specialist, and 87.7% (494/563) received appropriate care. The core LTFU data elements can be applied as a foundation to address the impact of early diagnosis by NBS within and across jurisdictions.