Dear students, faculty, alumni, staff and friends,
I hope everyone enjoyed the summer. Between commencement in late May, the arrival of a new group of PPID students, a visit from our friends from the dental schools at Meikai and Asahi Universities in Japan, and some major research advances, it was certainly a busy and productive one for our school.
I would like to use this opportunity to thank everyone for their support during this tough economic time for the University of California. Please enjoy this newsletter. It is a testament to your continued hard work and dedication which yield so many news stories. You have my sincere appreciation.
Dean No-Hee Park, DMD, PhD
Throughout the UCLA School of Dentistry, scientists are conducting research at the forefront of 21st-century dental medicine.
On July 20, 2009, the UCLA Office of Media Relations announced that UCLA medical researchers had collaborated with the dental school's Sotirios Tetradis as well as with other scientific colleagues to identify a way to turn off a key signaling pathway involved in the physiological processes that can stimulate the development of cancer and other diseases.
In the study, published in the journal Molecular Endocrinology, "scientists found that by activating a receptor in cells called the liver X receptor (LXR), they were able to inhibit the hedgehog (Hh) signaling pathway, which is involved in the maintenance of tissue integrity and stem cell generation. When stimulated in an unregulated manner, however, the Hh pathway can also cause cancers of the brain, lung, blood, prostate, skin and other tissues." The researchers' findings may lead to new treatments including targeted pharmaceuticals. The full announcement is available online.
On July 31, 2009, the UCLA Office of Media Relations issued a research advisory to announce that dental school researchers had come to a new understanding of the cause of a rare genetic facial disorder.
The disease, known as oculo-facial-cardio-dental syndrome (OFCD), is characterized by canine teeth with extremely long roots, congenital cataracts, craniofacial defects and congenital heart disease, and is associated with mutations in a protein that shuts down gene expression during fetal development.
The findings of Cun-Yu Wang and his colleagues, published in Nature Cell Biology, provide a molecular explanation for the exaggerated dental and craniofacial features seen in patients with OFCD, and unravel the epigenetic mechanisms that control human adult stem-cell function. This may lead to a treatment for OFCD, as well as to new therapies for promoting the growth of teeth and bone.
August 25, 2009 marked the date of the advance online publication, in the September 1 issue of Clinical Cancer Research, of new findings that emanated from David Wong's laboratory.
Wong and his colleagues at the dental school, the UCLA School of Public Health and the David Geffen School of Medicine at UCLA have expanded the available avenues for the diagnosis of oral squamous cell carcinoma (OSCC) to include microRNAs. Like hall monitors in an elementary school, microRNAs are the molecules produced by cells that simultaneously assess the behavior of multiple genes and control their activity.
Dr. David Wong and his colleagues previously demonstrated the usefulness of proteome and transcriptome diagnostics for oral cancer. The scientists’ latest results show that while the saliva of healthy individuals contains about 50 microRNAs, two in particular — miR-125a and miR-200a — are present at significantly different levels in the saliva of individuals suffering from OSCC.
To read the UCLA Office of Media Relations research alert, click here.
Nancy Reifel has won two grants. The American Dental Association (ADA) has awarded $1,335,000 for the Community Dental Health Coordinator Training Program, a UCLA School of Dentistry pilot program to provide clinical training and internships in a Native American community. She also has received more than $8,000 from Mono County to fund the Mono County Oral Health Project (for more information about the availability of oral health services in Mono County, see the story "A Dearth of Dentists" below).
Shen Hu has won three grants. Two are made possible by the American Recovery and Reinvestment Act (ARRA). One, from the National Cancer Institute, funds proteome analysis of oral cancer metastasis in the amount of $20,377. The other, a grant from the National Institute of Dental and Craniofacial Research, will fund a project concerning quantitative salivary proteomics for human oral cancer. Shen Hu's third grant, from the University of California Cancer Research Coordinating Center, provides $46,310 for a systems analysis of oral cancer.
Jeffrey Kim has won an F30 award of more than $66,000 from the National Institute for Dental and Craniofacial Research. He is studying the epigenetic regulation of oral cancer (for more information, please see the "T32 Success" story below).
Hao-Fu Lee has won two grants. The American Association of Orthodontists Foundation has granted a $15,000 Orthodontic Faculty Development Fellowship award, while the American Association of Orthodontists has given $60,000 as part of the Full-Time Faculty Teaching (FFT) Fellowship Program intended to address a recognized crisis in orthodontic education by providing funds to encourage and support the recruitment and retention of orthodontic educators.
BY MOIRA STOVALL
Congratulations are in order for Jeffrey Kim (’08). Jeff is a dual- degree student who has earned his DDS and is continuing toward the PhD as a trainee in the UCLA Dentist-Scientist and Oral Health Scientist Training Program (T32) in the laboratory of Dr. David Wong.
He also is the first UCLA T32 trainee to do what the program is designed to accomplish: win an independent research award. Jeff recently received news of an Individual National Research Service Award Predoctoral Dental Scientist Fellowship (F30) from the National Institute of Dental and Craniofacial Research.
In concert with the advancement of epigenetic science, there has been significant improvement in the field of cancer research, yet the matter of epigenetic regulation in oral cancer remains largely unresolved. This past year, 31,000 individuals were diagnosed with oral cancer in the US alone, of which more than 50% were in the advanced stages at the time of detection. One out of four patients with oral cancer dies due to delayed diagnosis. More detailed molecular mechanisms in the pathogenesis of oral cancer should be elucidated to ensure early detection and to reduce morbidity and mortality.
Dr. Kim’s objective is to understand the role of abrogated epigenetic regulation in oral carcinogenesis. Specifically, he wants to elucidate the molecular mechanism behind CDK2AP1-mediated DNA methylation.
The outcome of this research will potentially be used to develop diagnostic tools to detect oral cancer at the onset of the disease development (our current scientific knowledge is not sufficient to make an early diagnosis for oral cancer patients). Dr. Kim hopes to bridge the gap between the present assessment of oral cancer and the prognosis of the patient by studying the fundamental biology underlying the disease.
For the second summer in a row, something amazing happened in the laboratories at the UCLA School of Dentistry — and it was not simply cutting-edge science.
It was meaningful scientific research projects conducted by African-American and Latino teenagers from Los Angeles-area high schools under the supervision of dental school faculty mentors — many of whom are dentists and PhDs with prestigious grants from the National Institutes of Health. It's all part of a grant-funded program that seeks to address a national shortage of minority dentists.
Read the full story in a UCLA Magazine web exclusive, or click here for additional coverage by the L.A. Watts Times.
SOURCE: GWENDOLYN DRISCOLL, DIRECTOR OF COMMUNICATIONS & PUBLICATIONS, THE UCLA CENTER FOR HEALTH POLICY RESEARCH
According to a study published by the UCLA Center for Health Policy Research in June 2009, California has nearly 32,000 licensed dentists, or approximately 14 percent of the total number of dentists nationwide — the largest percentage of any state.
However, a "dental paradox" exists in that California also has 233 dental health professional shortage areas (DHPSAs), or smaller areas within counties that have a dentist-to-population ratio of one-to-5,000 or less, a population with unusually high needs, or an insufficient capacity for care among existing dentists.
To learn more about the communities where California has all the dentists it needs — and about where the needs are greatest, click here.