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Kim E, Ra K, Lee MS, Kim GA. Porcine Follicular Fluid-Derived Exosome: The Pivotal Material for Porcine Oocyte Maturation in Lipid Antioxidant Activity. Int J Mol Sci 2023; 24:9807. [PMID: 37372955 DOI: 10.3390/ijms24129807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/23/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Several studies have examined exosomes derived from porcine follicular fluid (FF), but few have reported their application in controlled experiments. The main concern in the field of embryology may be that controlled conditions, such as using a defined medium intermittently, cause poor results in mammalian oocyte maturation and embryo development. The first reason is the absence of the FF, which copes with the majority of the processes emerging in oocytes and embryos. Therefore, we added exosomes derived from porcine FF to the maturation medium of porcine oocytes. For morphological assessment, cumulus cell expansion and subsequent embryonic development were evaluated. Moreover, several stainings, such as glutathione (GSH) and reactive oxygen species (ROS), fatty acid, ATP, and mitochondrial activity, as well as evaluations of gene expression and protein analysis, were used for the functional verification of exosomes. When the oocytes were treated with exosomes, the lipid metabolism and cell survival of the oocytes were fully recovered, as well as morphological evaluations compared to the porcine FF-excluded defined medium. Therefore, controlled experiments may produce reliable data if the exosomes are treated with the desired amounts, and we suggest applying FF-derived exosomes to promote experimental data when performing controlled experiments in embryology.
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Affiliation(s)
- Euihyun Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Myung-Shin Lee
- Department of Microbiology and Immunology, School of Medicine, Eulji University, Daejeon 35233, Republic of Korea
| | - Geon A Kim
- Department of Biomedical Laboratory Science, School of Healthcare Science, Eulji University, Uijeongbu 34824, Republic of Korea
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2
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Ra K, Park SC, Lee BC. Female Reproductive Aging and Oxidative Stress: Mesenchymal Stem Cell Conditioned Medium as a Promising Antioxidant. Int J Mol Sci 2023; 24:ijms24055053. [PMID: 36902477 PMCID: PMC10002910 DOI: 10.3390/ijms24055053] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 02/16/2023] [Accepted: 03/05/2023] [Indexed: 03/09/2023] Open
Abstract
The recent tendency to delay pregnancy has increased the incidence of age-related infertility, as female reproductive competence decreases with aging. Along with aging, a lowered capacity of antioxidant defense causes a loss of normal function in the ovaries and uterus due to oxidative damage. Therefore, advancements have been made in assisted reproduction to resolve infertility caused by reproductive aging and oxidative stress, following an emphasis on their use. The application of mesenchymal stem cells (MSCs) with intensive antioxidative properties has been extensively validated as a regenerative therapy, and proceeding from original cell therapy, the therapeutic effects of stem cell conditioned medium (CM) containing paracrine factors secreted during cell culture have been reported to be as effective as that of direct treatment of source cells. In this review, we summarized the current understanding of female reproductive aging and oxidative stress and present MSC-CM, which could be developed as a promising antioxidant intervention for assisted reproductive technology.
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Affiliation(s)
- Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Se Chang Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
- Correspondence: (S.C.P.); (B.C.L.)
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
- Correspondence: (S.C.P.); (B.C.L.)
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3
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Oh HJ, Chung E, Kim J, Kim MJ, Kim GA, Lee SH, Ra K, Eom K, Park S, Chae JH, Kim JS, Lee BC. Generation of a Dystrophin Mutant in Dog by Nuclear Transfer Using CRISPR/Cas9-Mediated Somatic Cells: A Preliminary Study. Int J Mol Sci 2022; 23:ijms23052898. [PMID: 35270040 PMCID: PMC8911381 DOI: 10.3390/ijms23052898] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/02/2022] [Accepted: 03/04/2022] [Indexed: 01/27/2023] Open
Abstract
Dystrophinopathy is caused by mutations in the dystrophin gene, which lead to progressive muscle degeneration, necrosis, and finally, death. Recently, golden retrievers have been suggested as a useful animal model for studying human dystrophinopathy, but the model has limitations due to difficulty in maintaining the genetic background using conventional breeding. In this study, we successfully generated a dystrophin mutant dog using the CRISPR/Cas9 system and somatic cell nuclear transfer. The dystrophin mutant dog displayed phenotypes such as elevated serum creatine kinase, dystrophin deficiency, skeletal muscle defects, an abnormal electrocardiogram, and avoidance of ambulation. These results indicate that donor cells with CRISPR/Cas9 for a specific gene combined with the somatic cell nuclear transfer technique can efficiently produce a dystrophin mutant dog, which will help in the successful development of gene therapy drugs for dogs and humans.
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Affiliation(s)
- Hyun Ju Oh
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
| | - Eugene Chung
- Center for Genome Engineering, Institute for Basic Science, Seoul 08826, Korea;
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Jaehwan Kim
- Department of Veterinary Medical Imaging, College of Veterinary Medicine, Konkuk University, Seoul 5029, Korea; (J.K.); (K.E.)
| | - Min Jung Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
| | - Geon A. Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
- Department of Clinical Pathology, College of Health Science, Eulji University, Uijeongbu 11759, Korea
| | - Seok Hee Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
| | - Kidong Eom
- Department of Veterinary Medical Imaging, College of Veterinary Medicine, Konkuk University, Seoul 5029, Korea; (J.K.); (K.E.)
| | - Soojin Park
- Department of Pediatrics, Seoul National University College of Medicine, Seoul 03080, Korea; (S.P.); (J.-H.C.)
| | - Jong-Hee Chae
- Department of Pediatrics, Seoul National University College of Medicine, Seoul 03080, Korea; (S.P.); (J.-H.C.)
| | - Jin-Soo Kim
- Center for Genome Engineering, Institute for Basic Science, Seoul 08826, Korea;
- Correspondence: (J.-S.K.); (B.C.L.); Tel.: +82-2-880-9327 (J.-S.K.); +82-2-880-1269 (B.C.L.)
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (H.J.O.); (M.J.K.); (G.A.K.); (S.H.L.); (K.R.)
- Correspondence: (J.-S.K.); (B.C.L.); Tel.: +82-2-880-9327 (J.-S.K.); +82-2-880-1269 (B.C.L.)
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Ra K, Oh HJ, Kim EY, Kang SK, Ra JC, Kim EH, Park SC, Lee BC. Comparison of Anti-Oxidative Effect of Human Adipose- and Amniotic Membrane-Derived Mesenchymal Stem Cell Conditioned Medium on Mouse Preimplantation Embryo Development. Antioxidants (Basel) 2021; 10:antiox10020268. [PMID: 33572334 PMCID: PMC7916131 DOI: 10.3390/antiox10020268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 01/08/2023] Open
Abstract
Oxidative stress is a major cause of damage to the quantity and quality of embryos produced in vitro. Antioxidants are usually supplemented to protect embryos from the suboptimal in vitro culture (IVC) environment. Amniotic membrane-derived mesenchymal stem cells (AMSC) have emerged as a promising regenerative therapy, and their paracrine factors with anti-oxidative effects are present in AMSC conditioned medium (CM). We examined the anti-oxidative potential of human AMSC-CM treatment during IVC on mouse preimplantation embryo development and antioxidant gene expression in the forkhead box O (FoxO) pathway. AMSC-CM (10%) was optimal for overall preimplantation embryo developmental processes and upregulated the expression of FoxOs and their downstream antioxidants in blastocysts (BL). Subsequently, compared to adipose-derived mesenchymal stem cell (ASC)-CM, AMSC-CM enhanced antioxidant gene expression and intracellular GSH levels in the BL. Total antioxidant capacity and SOD activity were greater in AMSC-CM than in ASC-CM. Furthermore, SOD and catalase were more active in culture medium supplemented with AMSC-CM than in ASC-CM. Lastly, the anti-apoptotic effect of AMSC-CM was observed with the regulation of apoptosis-related genes and mitochondrial membrane potential in BL. In conclusion, the present study established AMSC-CM treatment at an optimal concentration as a novel antioxidant intervention for assisted reproduction.
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Affiliation(s)
- Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (K.R.); (H.J.O.); (E.H.K.)
| | - Hyun Ju Oh
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (K.R.); (H.J.O.); (E.H.K.)
- Research and Development Center, MKbiotech Co., Ltd., 99 Daehak-ro, Daejeon 34134, Korea
| | - Eun Young Kim
- Biostar Stem Cell Research Institute, R Bio Co., Ltd., Seoul 08506, Korea; (E.Y.K.); (S.K.K.); (J.C.R.)
| | - Sung Keun Kang
- Biostar Stem Cell Research Institute, R Bio Co., Ltd., Seoul 08506, Korea; (E.Y.K.); (S.K.K.); (J.C.R.)
| | - Jeong Chan Ra
- Biostar Stem Cell Research Institute, R Bio Co., Ltd., Seoul 08506, Korea; (E.Y.K.); (S.K.K.); (J.C.R.)
| | - Eui Hyun Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (K.R.); (H.J.O.); (E.H.K.)
| | - Se Chang Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
- Correspondence: (S.C.P.); (B.C.L.)
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (K.R.); (H.J.O.); (E.H.K.)
- Correspondence: (S.C.P.); (B.C.L.)
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5
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Kim EH, Kim GA, Taweechaipaisankul A, Ridlo MR, Lee SH, Ra K, Ahn C, Lee BC. Phytanic acid-derived peroxisomal lipid metabolism in porcine oocytes. Theriogenology 2020; 157:276-285. [PMID: 32823023 DOI: 10.1016/j.theriogenology.2020.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 12/15/2022]
Abstract
Lipid metabolism plays an important role in oocyte maturation. The peroxisome is the fundamental mediator for this mechanism. In this study, we investigated the peroxisomal lipid metabolism in porcine oocytes. Phytanic acid (PA) was chosen as an activator of alpha-oxidation in peroxisomes. Oocyte maturation, embryo development, immunocytochemistry of peroxisomal lipid activities, and staining of mitochondrial potentials were assessed. We found that 40 μM PA not only increased porcine oocyte maturation and embryonic development, but also upregulated the expression of genes and proteins related to activities of the peroxisomal lipid metabolism (PHYH, PEX19, and PEX subfamilies) and mitochondrial potentials (NRF1 and PGC1α). Moreover, PA upregulated the lipid droplet and fatty acid content in the oocytes. Moreover, mitochondria were activated and the mitochondrial membrane potential was increased after PA treatment, resulting in the production of more ATPs in the oocytes. Our findings suggest that the degradation of PA via alpha-oxidation in the peroxisome may potentiate oocyte maturation processes, peroxisomal lipid oxidation, and mitochondria activities.
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Affiliation(s)
- Eui Hyun Kim
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Geon A Kim
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea; Department of Biomedical Laboratory Science, School of Medicine, Eulji University, Daejeon, Republic of Korea
| | - Anukul Taweechaipaisankul
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Muhammad Rosyid Ridlo
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea; Department of Bioresource Technology and Veterinary, Vocational College, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Seok Hee Lee
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Curie Ahn
- Division of Nephrology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.
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Abdillah DA, Setyawan EMN, Oh HJ, Ra K, Lee SH, Kim MJ, Lee BC. Iodixanol supplementation during sperm cryopreservation improves protamine level and reduces reactive oxygen species of canine sperm. J Vet Sci 2019; 20:79-86. [PMID: 30481988 PMCID: PMC6351762 DOI: 10.4142/jvs.2019.20.1.79] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/08/2018] [Accepted: 11/18/2018] [Indexed: 12/13/2022] Open
Abstract
The objective of this study was to analyze the protective effects of iodixanol on dog spermatozoa during cryopreservation. The optimal concentration of iodixanol, 1.5%, was determined using fresh spermatozoa and was applied in the following experiments. The 1.5% iodixanol group showed significantly increased sperm motility from that in the control (p < 0.05). Lower mitochondrial reactive oxygen species (ROS) modulator (ROMO1) and pro-apoptotic gene (BAX) expressions, together with higher expressions of protamine-2 (PRM2), protamine-3 (PRM3), anti-apoptotic B-cell lymphoma-2 (BCL2), and sperm acrosome associated-3 (SPACA3) genes were detected in the iodixanol-treated group. In addition, decreased protamine deficiency and cryocapacitation were observed in the treatment group. Our results show that supplementation with 1.5% iodixanol is ideal for reducing production of ROS and preventing detrimental effects during the canine sperm cryopreservation process, effects manifested as increased motility and reduced cryocapacitation in frozen-thawed spermatozoa.
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Affiliation(s)
- Dimas A Abdillah
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Erif M N Setyawan
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Hyun Ju Oh
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Seok Hee Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Min Jung Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
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7
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Lee SH, Oh HJ, Kim MJ, Kim GA, Setyawan EMN, Ra K, Abdillah DA, Lee BC. Dog cloning-no longer science fiction. Reprod Domest Anim 2019; 53 Suppl 3:133-138. [PMID: 30474338 DOI: 10.1111/rda.13358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 09/21/2018] [Indexed: 01/23/2023]
Abstract
Since the generation of world's first cloned dog, Snuppy, in 2005, somatic cell nuclear transfer (SCNT) in dogs has been widely applied for producing several kinds of dogs with specific objectives. Previous studies have demonstrated that cloned dogs show normal characteristics in growth, blood parameters and behavioural aspect. Also, canine SCNT technique has been applied to propagate working dogs with excellent abilities in fields such as assistance of disabled people, drugs detection and rescue activity. Because dogs have similar habituation properties and share many characteristics including anatomic and physiological aspects with humans, they are also primary candidates for human disease models. Recently, transgenic dogs that express red fluorescent protein gene constitutively and green fluorescent protein gene conditionally have been generated. In addition, transgenic dogs with an overexpression of peroxisome proliferator-activated receptor-alpha in specific muscles were generated to enhance physical performance. In 2017, Snuppy was recloned with markedly increased pregnancy and delivery rates compared to the statistics from when Snuppy was first cloned. Such striking improvements in the cloning of dogs using SCNT procedures suggest that dog cloning could be applied in many fields of biomedical science for human diseases research, and the application of cloning is no longer science fiction.
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Affiliation(s)
- Seok Hee Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyun Ju Oh
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Min Jung Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Geon A Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Erif Maha Nugraha Setyawan
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Dimas Arya Abdillah
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
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Harkenrider M, Adams W, Nieto K, Aref I, Bergman D, Chundury A, Elshaikh M, Gaffney D, Jhingran A, Lee L, Paydar I, Ra K, Schwarz J, Thorpe C, Viswanathan A, Small W. Multi-institutional Analysis of Vaginal Brachytherapy Without External Beam Radiation Therapy for Stage II Endometrial Cancer Patients. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Abstract
Dog cloning as a concept is no longer infeasible. Starting with Snuppy, the first cloned dog in the world, somatic cell nuclear transfer (SCNT) has been continuously developed and used for diverse purposes. In this article we summarise the current method for SCNT, the normality of cloned dogs and the application of dog cloning not only for personal reasons, but also for public purposes.
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Affiliation(s)
- Hyun Ju Oh
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kihae Ra
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Min Jung Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Geon A Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Erif Maha Nugraha Setyawan
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seok Hee Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
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Ra K. [Treatment of hypertension in preventive health care. Experiences from a high-risk strategy in the first cardiovascular examinations]. Tidsskr Nor Laegeforen 1992; 112:27-30. [PMID: 1553639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A subset of the total population aged 35-49 years was screened for elevated blood pressure in three Norwegian counties. As part of a high risk approach in the prevention of risk factors for CVD, the persons identified as having elevated blood pressure were referred for intervention and treatment. The follow-up time varied from three to five years. Even though there was an overall improvement of blood pressure during the follow-up period, a comparison showed no overall significant difference in the magnitude of blood pressure reduction between those that participated in the intervention program and those that did not. The paper raises questions about the quality of the intervention and about the high risk approach in general as a model for prevention.
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Affiliation(s)
- K Ra
- Department of Epidemiology, Johns Hopkins University, School of Hygiene and Public Health, Baltimore, MD 21205
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11
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Abstract
The relations among race, family income, and low birth weight were examined using information obtained from the National Longitudinal Survey of Youth, which conducted yearly interviews with a nationally representative sample of young women identified in the late 1970s. Data were available for these women and their offspring from 1979 through 1988. Maternal education, maternal age, age/parity risk, marital status, and smoking during pregnancy served as covariates in cross-sectional and longitudinal analyses. The risk of low birth weight among births to black women and white women who were poor was at similarly high levels regardless of whether poverty was determined prior to study entrance or during the study period. Longitudinal analyses showed an exceptionally large increase in risk of low birth weight among children born to women whose prior pregnancy ended in a low-birth-weight infant. These two findings emphasize the importance of factors antecedent to the pregnancy in the genesis of low birth weight.
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Affiliation(s)
- B Starfield
- Department of Health Policy and Management, Johns Hopkins University School of Hygiene and Public Health, Baltimore, MD 21205
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Abstract
This study was conducted to assess the reliability of self-reported hospitalization data, as well as the appropriateness of using self-reported data in evaluating the effectiveness of the Maine Ambulatory Diabetes Education and Follow-Up (ADEF) program. A Maine Blue Cross/Blue Shield (BC/BS) inpatient claims file was used as the reference source to verify self-reported hospitalization data. For a sample of 99 BC/BS subscribers who attended the ADEF program, 77% of the study participants accurately self-reported hospitalization patterns over a 12-mo time period before attending the education program, and 81% of the participants accurately self-reported hospitalization patterns during a posteducation follow-up time period. The reference BC/BS claims data documented a reduction in hospitalizations for the study participants similar to that reported using the ADEF self-reported hospitalization data. The Maine Diabetes Control Project used the self-reported hospitalization data in combination with selected reference claims data to secure third-party reimbursement for the Maine ADEF Program.
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