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Kim K, Kim HH, Joo JB, Kim OK, Park SW, Suh GH, Ro WB, Lee CM. Evaluation of the clinical usefulness of pancreatic alpha amylase as a novel biomarker in dogs with acute pancreatitis: a pilot study. Vet Q 2024; 44:1-7. [PMID: 38497337 PMCID: PMC10949834 DOI: 10.1080/01652176.2024.2326007] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 02/10/2024] [Indexed: 03/19/2024] Open
Abstract
Pancreatic alpha amylase (P-AMY) is used as a biomarker of acute pancreatitis (AP) in human medicine. To our knowledge, there are no studies evaluating the usefulness of P-AMY in dogs with AP. In this study, we evaluated the diagnostic value of P-AMY, currently not verified in veterinary medicine. The AP group (n = 40) consisted of dogs with AP diagnosed using clinical signs and laboratory examinations, including abnormal canine pancreatic lipase (cPL) concentration, and compatible abdominal ultrasound examination at first presentation. Evaluation of the canine AP severity (CAPS) score was performed. The control group (n = 38) was composed of normal dogs without any abnormalities in clinical findings, blood exams or diagnostic imaging. The correlation of P-AMY with cPL was confirmed by Pearson's correlation analysis (r = 0.564, p < .001). The sensitivity and specificity for the most appropriate cut-off values of P-AMY were recorded similar to the values of DGGR. The dogs with AP and CAPS ≥11 had significantly higher serum P-AMY (p = .016) contrary to DGGR lipase and cPL. Furthermore, there was a significant difference in the median P-AMY dependent on the presence of systemic inflammatory response syndrome (p = .001). P-AMY showed similar level of diagnostic accuracy along with sensitivity and specificity compared to DGGR lipase. In addition, P-AMY showed a significant association with CAPS score, contrary to cPL and DGGR lipase. Along with other biomarkers associated with AP, P-AMY has the potential of usefulness as a supportive diagnostic and prognostic biomarker of AP in dogs.
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Affiliation(s)
- Keon Kim
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Hee-hong Kim
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
- Cool-pet Animal Hospital, Daegu, Korea
| | - Jae-Beom Joo
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Ock-Kyu Kim
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Sin-Wook Park
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Guk-Hyun Suh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Woong-Bin Ro
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
| | - Chang-Min Lee
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR program, Chonnam National University, Gwangju, Korea
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2
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Hyeong S, Lee J, Kim S, Lee D, Suh GH, Choi J. Application of endoscopic ultrasound to the descending colon and rectum in normal dogs. Vet Radiol Ultrasound 2023. [PMID: 36876648 DOI: 10.1111/vru.13226] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 01/23/2023] [Accepted: 01/23/2023] [Indexed: 03/07/2023] Open
Abstract
Endoscopic ultrasound (EUS) is a medical procedure in which endoscopy is combined with ultrasonography (US) to compensate for problems associated with the transabdominal US such as large penetration depths, presence of intestinal gas, and acoustic shadowing. This prospective, method comparison, pilot study was performed to assess the feasibility of applying EUS in the colorectal region and to describe the typical EUS features of the descending colon and rectum in healthy dogs. Transabdominal US and EUS with or without the hydrosonography were applied to the descending colon and rectum in 10 clinically healthy Beagle dogs and wall thickness, visibility of the wall layers, and conspicuity of the mucosal and serosal surfaces of the intestinal wall were assessed. Endoscopic ultrasound enabled circumferential evaluation of the colorectal wall and provided better visibility of the wall layers and conspicuity of the mucosal and serosal surfaces without degradation of the image, even in the far-field portion of the colorectal wall, compared to US. Moreover, EUS provided the adequate image quality of the rectum, which was difficult to evaluate with US due to deep scan depth and acoustic shadowing by the pelvis. Meanwhile, the application of hydrosonography to EUS deteriorated the visibility of the wall layers and conspicuity of the intestinal wall. The results of this study demonstrate the feasibility of EUS to assess the colorectal region and its potential application for the evaluation of rectal masses or intrapelvic lesions that are inaccessible by the transabdominal US in dogs.
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Affiliation(s)
- Seongjae Hyeong
- College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Juryeong Lee
- College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Soyeon Kim
- Department of Veterinary Medical Imaging, College of Veterinary medicine, Seoul National University, Seoul, South Korea
| | - Dongjae Lee
- Department of Veterinary Medical Imaging, College of Veterinary medicine, Seoul National University, Seoul, South Korea
| | - Guk-Hyun Suh
- College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Jihye Choi
- Department of Veterinary Medical Imaging, College of Veterinary medicine, Seoul National University, Seoul, South Korea
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3
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Lee J, Lee D, Suh GH, Choi J. Contrast-enhanced ultrasonography for evaluation of the blood perfusion of sciatic nerves in healthy dogs. Vet Radiol Ultrasound 2023; 64:322-329. [PMID: 36264587 DOI: 10.1111/vru.13180] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 08/27/2022] [Accepted: 08/27/2022] [Indexed: 11/30/2022] Open
Abstract
Blood supply to the peripheral nerves is essential for fulfilling their structural and functional requirements. This prospective, experimental, exploratory study aimed to assess the feasibility of contrast-enhanced ultrasonography (CEUS) for evaluating blood perfusion of the sciatic nerve in normal dogs. Contrast-enhanced ultrasonography examinations were performed on the bilateral sciatic nerves after bolus injection of Sonazoid™ (0.015 mL/kg) in 12 healthy Beagles for 150 s. Then, qualitative assessment of the wash-in timing, degree and enhancement patterns, and quantitative measurement of the peak intensity and time to peak intensity were performed from the sciatic nerve. The results were compared to those obtained from the adductor muscle around the nerve and caudal gluteal artery. After contrast agent injection, the sciatic nerve was enhanced at approximately 13-14 s, immediately after wash-in of the caudal gluteal artery. The peak intensity of the sciatic nerve was significantly lower than that of the caudal gluteal artery and higher than that of the adductor muscle. The time to peak intensity was significantly slower than that of the caudal gluteal artery; but was not significantly different from that of the adductor muscle. There were no significant differences in the peak intensity and time to peak intensity between the left and right sciatic nerves. These results demonstrate the feasibility of CEUS to assess blood perfusion of the sciatic nerve in healthy dogs qualitatively and quantitatively. This result from healthy dogs could serve as a reference for further studies that evaluate the sciatic nerve under pathological conditions.
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Affiliation(s)
- Juryeong Lee
- Department of veterinary Medical Imaging, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Dongjae Lee
- Department of Veterinary Medical Imaging, College of Veterinary medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Guk-Hyun Suh
- Department of veterinary Medical Imaging, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Jihye Choi
- Department of Veterinary Medical Imaging, College of Veterinary medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
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4
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Ahmad S, Koh KY, Lee JI, Suh GH, Lee CM. Interpolation of Point Prevalence Rate of the Highly Pathogenic Avian Influenza Subtype H5N8 Second Phase Epidemic in South Korea. Vet Sci 2022; 9:vetsci9030139. [PMID: 35324867 PMCID: PMC8954420 DOI: 10.3390/vetsci9030139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 11/29/2022] Open
Abstract
Humans and animals are both susceptible to highly pathogenic avian influenza (HPAI) viruses. In the future, HPAI has the potential to be a source of zoonoses and pandemic disease drivers. It is necessary to identify areas of high risk that are more vulnerable to HPAI infections. In this study, we applied unbiased predictions based on known information to find points of localities with a high probability of point prevalence rate. To carry out such predictions, we utilized the inverse distance weighting (IDW) and kriging method, with the help of the R statistical computing program. The provinces of Jeollanam-do, Gyeonggi-do, Chungcheongbuk-do and Ulsan have high anticipated risk. This research might aid in the management of avian influenza threats associated with various potential risks.
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Affiliation(s)
- Saleem Ahmad
- Veterinary Public Health Lab, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.A.); (K.-Y.K.); (J.-i.L.)
| | - Kye-Young Koh
- Veterinary Public Health Lab, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.A.); (K.-Y.K.); (J.-i.L.)
| | - Jae-il Lee
- Veterinary Public Health Lab, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.A.); (K.-Y.K.); (J.-i.L.)
| | - Guk-Hyun Suh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Korea;
| | - Chang-Min Lee
- Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Korea;
- Correspondence:
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Ahn KS, Ahn AJ, Kim HJ, Lee CM, Suh GH, Won EJ, Shin S. Extermination Speed of an Imidacloprid and Flumethrin Polymer Matrix Collar against Larvae, Nymphs and Adults of Haemaphysalis longicornis. Korean J Parasitol 2021; 59:481-487. [PMID: 34724767 PMCID: PMC8561046 DOI: 10.3347/kjp.2021.59.5.481] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 10/12/2021] [Indexed: 11/23/2022]
Abstract
The objective of this study was to evaluate the efficacy of an imidacloprid 10% and flumethrin 4.5% polymer matrix collar against the developmental stages of Haemaphysalis longicornis infesting dogs using the hair from treated dogs in a semi-in-vitro assay set. When incubated with 0.5 g of the hair collected from the dogs installed with the drug-embedded collar after 10 days, average death rate of the larval, nymphal, and adult H. longicornis was 21.5%, 77.9%, and 100% at 30 min, 1 hr, and 2 hr, respectively. This study showed the larval stages as well as the nymphal and adult stages of H. longicornis ticks are killed upon contact with the hair from dogs treated with the collar within 2 hr.
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Affiliation(s)
- Kyu-Sung Ahn
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Ah-Jin Ahn
- Gwangju Metropolitan Government Research Institute of Public Health and Environment, Gwangju 61954, Korea
| | - Ha-Jung Kim
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Chang-Min Lee
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Guk-Hyun Suh
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Eun Jeong Won
- Department of Parasitology and Tropical Medicine, Chonnam National University Medical School, Hwasun-gun 58128, Korea
| | - SungShik Shin
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
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6
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Kwon YJ, Suh GH, Kang SS, Kim HJ. Successful management of proteinuria and systemic hypertension in a dog with renal cell carcinoma with surgery, telmisartan, and amlodipine. Can Vet J 2018; 59:759-762. [PMID: 30026623 PMCID: PMC6005071] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
An 11-year-old neutered male Yorkshire terrier dog was presented with a 3-week history of hematuria and anorexia. A unilateral renal mass was detected and surgically removed. The renal mass was diagnosed on histopathologic examination as a renal carcinoma. Supportive medical therapy was carried out and persistent systemic hypertension was managed using telmisartan.
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Affiliation(s)
- Yong-Jin Kwon
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
| | - Guk-Hyun Suh
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
| | - Seong-Soo Kang
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
| | - Ha-Jung Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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7
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Lee SH, Shin DJ, Kim Y, Kim CJ, Lee JJ, Yoon MS, Uong TNT, Yu D, Jung JY, Cho D, Jung BG, Kim SK, Suh GH. Comparison of Phenotypic and Functional Characteristics Between Canine Non-B, Non-T Natural Killer Lymphocytes and CD3 +CD5 dimCD21 - Cytotoxic Large Granular Lymphocytes. Front Immunol 2018; 9:841. [PMID: 29755462 PMCID: PMC5934500 DOI: 10.3389/fimmu.2018.00841] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [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: 12/08/2017] [Accepted: 04/05/2018] [Indexed: 12/28/2022] Open
Abstract
Natural killer (NK) cells play a pivotal role in the immune response against infections and malignant transformation, and adopted transfer of NK cells is thought to be a promising therapeutic approach for cancer patients. Previous reports describing the phenotypic features of canine NK cells have produced inconsistent results. Canine NK cells are still defined as non-B and non-T (CD3−CD21−) large granular lymphocytes. However, a few reports have demonstrated that canine NK cells share the phenotypic characteristics of T lymphocytes, and that CD3+CD5dimCD21− lymphocytes are putative canine NK cells. Based on our previous reports, we hypothesized that phenotypic modulation could occur between these two populations during activation. In this study, we investigated the phenotypic and functional differences between CD3+CD5dimCD21− (cytotoxic large granular lymphocytes) and CD3−CD5−CD21− NK lymphocytes before and after culture of peripheral blood mononuclear cells isolated from normal dogs. The results of this study show that CD3+CD5dimCD21− lymphocytes can be differentiated into non-B, non-T NK (CD3−CD5−CD21−TCRαβ−TCRγδ−GranzymeB+) lymphocytes through phenotypic modulation in response to cytokine stimulation. In vitro studies of purified CD3+CD5dimCD21− cells showed that CD3−CD5−CD21− cells are derived from CD3+CD5dimCD21− cells through phenotypic modulation. CD3+CD5dimCD21− cells share more NK cell functional characteristics compared with CD3−CD5−CD21− cells, including the expression of T-box transcription factors (Eomes, T-bet), the production of granzyme B and interferon-γ, and the expression of NK cell-related molecular receptors such as NKG2D and NKp30. In conclusion, the results of this study suggest that CD3+CD5dimCD21− and CD3−CD5−CD21− cells both contain a subset of putative NK cells, and the difference between the two populations may be due to the degree of maturation.
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Affiliation(s)
- Soo-Hyeon Lee
- Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, South Korea.,Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea
| | - Dong-Jun Shin
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea.,Research Institute for Natural Products, Kongju National University, Yesan-gun, South Korea
| | - Yoseop Kim
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea
| | - Cheol-Jung Kim
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea
| | - Je-Jung Lee
- Department of Hemotology-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Mee Sun Yoon
- Department of Radiation Oncology, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Gwangju, South Korea
| | - Tung Nguyen Thanh Uong
- Department of Radiation Oncology, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Gwangju, South Korea
| | - Dohyeon Yu
- Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Ji-Youn Jung
- Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, South Korea.,Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea.,Research Institute for Natural Products, Kongju National University, Yesan-gun, South Korea
| | - Duck Cho
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Bock-Gie Jung
- Department of Pulmonary Immunology, The University of Texas Health Science Center, Tyler, TX, United States
| | - Sang-Ki Kim
- Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, South Korea.,Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, South Korea.,Research Institute for Natural Products, Kongju National University, Yesan-gun, South Korea
| | - Guk-Hyun Suh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
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Shin J, Ahn KS, Suh GH, Kim HJ, Jeong HS, Kim BS, Choi E, Shin SS. First Blindness Cases of Horses Infected with Setaria Digitata (Nematoda: Filarioidea) in the Republic of Korea. Korean J Parasitol 2017; 55:667-671. [PMID: 29320823 PMCID: PMC5776899 DOI: 10.3347/kjp.2017.55.6.667] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 11/27/2017] [Accepted: 12/11/2017] [Indexed: 11/23/2022]
Abstract
Ocular setariases of cattle were reported but those of equine hosts have never been reported in the Republic of Korea (Korea). We found motile worms in the aqueous humor of 15 horses (Equus spp.) from 12 localities in southern parts of Korea between January 2004 and November 2017. After the affected animals were properly restrained under sedation and local anesthesia, 10 ml disposable syringe with a 16-gauge needle was inserted into the anterior chamber of the affected eye to successfully remove the parasites. The male worm that was found in 7 of the cases showed a pair of lateral appendages near the posterior terminal end of the body. The papillar arrangement was 3 pairs of precloacal, a pair of adcloacal, and 3 pairs of postcloacal papillae, plus a central papilla just in front of the cloaca. The female worms found in the eyes of 8 horses were characterized by the tapering posterior terminal end of the body with a smooth knob. Worms were all identified as Setaria digitata (von Linstow, 1906) by the morphologic characteristics using light and electron microscopic observations. This is the first blindness cases of 15 horses infected with S. digitata (Nematoda: Filarioidea) in Korea.
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Affiliation(s)
- Jihun Shin
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Kyu-Sung Ahn
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Guk-Hyun Suh
- Clinical Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Ha-Jung Kim
- Clinical Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | | | - Byung-Su Kim
- YeongGwang Veterinary Clinic, Jeollanam-do 57043, Korea
| | | | - Sung-Shik Shin
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
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Suh GH, Ahn KS, Ahn JH, Kim HJ, Leutenegger C, Shin S. Serological and molecular prevalence of canine vector-borne diseases (CVBDs) in Korea. Parasit Vectors 2017; 10:146. [PMID: 28298245 PMCID: PMC5353868 DOI: 10.1186/s13071-017-2076-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 01/23/2017] [Accepted: 03/06/2017] [Indexed: 11/26/2022] Open
Abstract
Background Previous surveys in dogs from Korea indicated that dogs are exposed to a variety of vector- borne pathogens, but perception for a nation-wide canine vector-borne disease (CVBD) occurrence has been missing. We report here results of both serological and molecular prevalence studies for major CVBDs of dogs from all over the South Korean Peninsula except for Jeju Island. Results Serological survey of 532 outdoor dogs revealed the highest prevalence for Dirofilaria immitis (25.2%), followed by Anaplasma phagocytophilum (15.6%), Ehrlichia canis (4.7%) whereas Borrelia burgdorferi showed the lowest prevalence (1.1%). The number of serologically positive dogs for any of the four pathogens was 216 (40.6%). Concurrent real-time PCR assay of 440 dogs in the study indicated that DNA of “Candidatus M. haematoparvum”, Mycoplasma haemocanis, Babesia gibsoni, A. phagocytophilum, and Hepatozoon canis was identified in 190 (43.2%), 168 (38.2%), 23 (5.2%), 10 (2.3%) and 1 (0.2%) dogs, respectively. DNA of Bartonella spp., Ehrlichia spp., Leishmania spp., Rickettsia spp. and Neorickettsia risticii was not identified. Analysis of questionnaires collected from owners of 440 dogs showed that the number of dogs with heartworm preventive medication was 348 (79.1%) among which dogs still positive to D. immitis infection were 60 (17.2%), probably due to the mean months of heartworm preventive medication being only 6.5. The high prevalence rates of both “Ca. M. haematoparvum” and Mycoplasma haemocanis in dogs from Korea indicate that these organisms may be transmitted by vectors other than Rhipicephalus sanguineus because this tick species has rarely been found in Korea. This is the first nationwide survey for canine haemotropic mycoplasma infections in Korea. Conclusions This study showed that the risk of exposure to major vector-borne diseases in dogs is quite high throughout all areas of South Korean Peninsula. Since achieving full elimination of many pathogens causing CVBDs from infected animals is often impossible even when they are clinically cured, dogs once exposed to CVBDs can remain as lifetime reservoirs of disease for both other animals and humans in the close vicinity, and should therefore be treated with preventative medications to minimise the risk of pathogen transmission by the competent vectors.
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Affiliation(s)
- Guk-Hyun Suh
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Kyu-Sung Ahn
- Department of Parasitology, Animal Medical Institute, College of Veterinary Medicine, Chonnam National University, 77 Yongbong-ro, Gwangju, 61186, South Korea
| | - Jong-Ho Ahn
- Department of Parasitology, Animal Medical Institute, College of Veterinary Medicine, Chonnam National University, 77 Yongbong-ro, Gwangju, 61186, South Korea
| | - Ha-Jung Kim
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | | | - SungShik Shin
- Department of Parasitology, Animal Medical Institute, College of Veterinary Medicine, Chonnam National University, 77 Yongbong-ro, Gwangju, 61186, South Korea.
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10
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Park MH, Jun HS, Jeon JW, Park JK, Lee BJ, Suh GH, Park JS, Cho CW. Preparation and characterization of bee venom-loaded PLGA particles for sustained release. Pharm Dev Technol 2016; 23:857-864. [PMID: 27881046 DOI: 10.1080/10837450.2016.1264415] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Bee venom-loaded poly(lactic-co-glycolic acid) (PLGA) particles were prepared by double emulsion-solvent evaporation, and characterized for a sustained-release system. Factors such as the type of organic solvent, the amount of bee venom and PLGA, the type of PLGA, the type of polyvinyl alcohol, and the emulsification method were considered. Physicochemical properties, including the encapsulation efficiency, drug loading, particle size, zeta-potential and surface morphology were examined by Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and X-ray diffraction (XRD). The size of the bee venom-loaded PLGA particles was 500 nm (measured using sonication). Zeta-potentials of the bee venom-loaded PLGA particles were negative owing to the PLGA. FT-IR results demonstrated that the bee venom was completely encapsulated in the PLGA particles, indicated by the disappearance of the amine and amide peaks. In addition, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis indicated that the bee venom in the bee venom-loaded PLGA particles was intact. In vitro release of the bee venom from the bee venom-loaded PLGA particles showed a sustained-release profile over 1 month. Bee venom-loaded PLGA particles can help improve patients' quality of life by reducing the number of injections required.
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Affiliation(s)
- Min-Ho Park
- a College of Pharmacy and Institute of Drug Research and Development , Chungnam National University , Daejeon , South Korea
| | - Hye-Suk Jun
- a College of Pharmacy and Institute of Drug Research and Development , Chungnam National University , Daejeon , South Korea
| | | | | | - Bong-Joo Lee
- c College of Veterinary Medicine , Chonnam National University , Gwangju , South Korea
| | - Guk-Hyun Suh
- c College of Veterinary Medicine , Chonnam National University , Gwangju , South Korea
| | - Jeong-Sook Park
- a College of Pharmacy and Institute of Drug Research and Development , Chungnam National University , Daejeon , South Korea
| | - Cheong-Weon Cho
- a College of Pharmacy and Institute of Drug Research and Development , Chungnam National University , Daejeon , South Korea
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11
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Ahn KS, Ahn AJ, Kim TH, Suh GH, Joo KW, Shin SS. Identification and Prevalence of Globocephalus samoensis (Nematoda: Ancylostomatidae) among Wild Boars (Sus scrofa coreanus) from Southwestern Regions of Korea. Korean J Parasitol 2015; 53:611-8. [PMID: 26537041 PMCID: PMC4635825 DOI: 10.3347/kjp.2015.53.5.611] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 07/07/2015] [Accepted: 07/29/2015] [Indexed: 12/02/2022]
Abstract
This study describes the first record of Globocephalus samoensis (Nematoda: Ancylostomatidae) recovered in wild boars from southwestern regions of Korea. Gastrointestinal tracts of 111 Korean wild boars (Sus scrofa coreanus) hunted from mountains in Suncheon-si, Gwangyang-si, and Boseong-gun between 2009 and 2012 were examined for their visceral helminths. G. samoensis, as identified by morphological characteristics of the head and tail, were recovered from the small intestine of 51 (45.9%) wild boars. Worms were found from 7 of 28 wild boars (25.0%) from Suncheon-si, 40 of 79 (50.6%) from Gwangyang-si, and all 4 (100%) from Boseong-gun. The length of adult females was 7.2±0.5 mm, and the thickest part of the body measured the average 0.47±0.03 mm, while those of males were 6.52±0.19 and 0.37±0.02 mm, respectively. The buccal cavity was equipped with a pair of large and bicuspid subventral lancets near the base of the capsule. The average length of spicules of males was 0.45±0.02 mm. By the present study, G. samoensis is recorded for the first time in southwestern regions of Korea. Additionally, morphological characteristics and identification keys provided in the present study will be helpful in the faunistic and taxonomic studies for strongylid nematodes in both domestic and wild pigs. The infection of G. samoensis apparently did not elicit pathologic lesions, as revealed by macroscopic observation during the autopsy of all wild boars in this study.
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Affiliation(s)
- Kyu-Sung Ahn
- Department of Parasitology and Department of Theriogenology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Ah-Jin Ahn
- Department of Parasitology and Department of Theriogenology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Tae-Hoon Kim
- Department of Parasitology and Department of Theriogenology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Guk-Hyun Suh
- Department of Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Kyoung-Woong Joo
- Department of Clinical Pathology, Gwangju Health University, Gwangju 62287, Korea
| | - Sung-Shik Shin
- Department of Parasitology and Department of Theriogenology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
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Kim YM, Lee JA, Jung BG, Kim TH, Lee BJ, Suh GH. Reference ranges of hematology and lymphocyte subsets in healthy Korean native cattle (Hanwoo) and Holstein dairy cattle. Anim Sci J 2015; 87:796-801. [PMID: 26419947 DOI: 10.1111/asj.12485] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 12/26/2014] [Revised: 05/04/2015] [Accepted: 06/02/2015] [Indexed: 11/27/2022]
Abstract
There are no accurate reference ranges for hematology parameters and lymphocyte subsets in Korean native beef cattle (Hanwoo). This study was performed to establish reliable reference ranges of hematology and lymphocyte subsets using a large number of Hanwoo cattle (n = 350) and to compare differences between Hanwoo and Holstein dairy cattle (n = 334). Additionally, age-related changes in lymphocyte subsets were studied. Bovine leukocyte subpopulation analysis was performed using mono or dual color flow cytometry. The leukocyte subpopulations investigated in healthy cattle included: CD2(+) cells, sIgM(+) cells, MHC class II(+) cells, CD3(+) CD4(+) cells, CD3(+) CD8(+) cells, and WC1(+) cells. Although Hanwoo and Holstein cattle are the same species, results showed several differences in hematology and lymphocyte subsets between Hanwoo and Holstein cattle. This study is the first report to establish reference ranges of hematology and lymphocyte subsets in adult Hanwoo cattle.
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Affiliation(s)
- Yun-Mi Kim
- Department of Veterinary Infectious Disease, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Jin-A Lee
- Department of Veterinary Infectious Disease, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Bock-Gie Jung
- Center for Pulmonary and Infectious Disease Control, University of Texas Health Science Center at Tyler, Tyler, TX, USA
| | - Tae-Hoon Kim
- Department of Veterinary Infectious Disease, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Bong-Joo Lee
- Department of Veterinary Infectious Disease, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Guk-Hyun Suh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
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Shin DJ, Lee SH, Park JY, Kim JS, Lee JJ, Suh GH, Lee YK, Cho D, Kim SK. Interleukin-21 induces proliferation and modulates receptor expression and effector function in canine natural killer cells. Vet Immunol Immunopathol 2015; 165:22-33. [DOI: 10.1016/j.vetimm.2015.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 02/27/2015] [Accepted: 03/02/2015] [Indexed: 10/23/2022]
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Park JY, Shin DJ, Lee SH, Lee JJ, Suh GH, Cho D, Kim SK. The anti-canine distemper virus activities of ex vivo-expanded canine natural killer cells. Vet Microbiol 2015; 176:239-49. [DOI: 10.1016/j.vetmic.2015.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/22/2015] [Accepted: 01/23/2015] [Indexed: 12/19/2022]
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Ahn AJ, Ahn KS, Suh GH, Noh JH, Kim YH, Yoo MS, Kang SW, Shin SS. Efficacy of silver ions against Sacbrood virus infection in the Eastern honey bee Apis cerana. J Vet Sci 2015; 16:289-95. [PMID: 25797295 PMCID: PMC4588014 DOI: 10.4142/jvs.2015.16.3.289] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 11/18/2014] [Accepted: 03/07/2015] [Indexed: 11/20/2022] Open
Abstract
Although silver is known to be a broad-spectrum biocidal agent, the effects of this metal against Sacbrood virus have not yet been investigated. In this study, we evaluated the efficacy of silver ions against natural Korean sacbrood virus (KSBV) infection of Apis (A.) cerana. Ten KSBV-infected colonies containing A. cerana with similar strength and activity were selected from an apiary located in Bosung-gun (Korea). Among these, five colonies were randomly assigned to the treatment group that was fed sugar syrup containing 0.2 mg/L silver ions. The other colonies were assigned to the untreated control group in which bees were given syrup without the silver ions. To assess the efficacy of the silver ions, colony strength, colony activity, and the number of dead larvae per hive were measured. During the experimental period, the test group maintained its strength and activity until day 32 while those of bees in the control group decreased sharply after day 8 to 16. Survival duration of the test group was significantly longer (40 days) than that of the control group (21 days). These results strongly indicated that silver ions are effective against KSBV infection in A. cerana.
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Affiliation(s)
- Ah-Jin Ahn
- Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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Lee JA, Jung BG, Kim TH, Kim YM, Park MH, Hyun PM, Jeon JW, Park JK, Cho CW, Suh GH, Lee BJ. Poly D,L-lactide-co-glycolide (PLGA) nanoparticle-encapsulated honeybee (Apis melifera) venom promotes clearance of Salmonella enterica serovar Typhimurium infection in experimentally challenged pigs through the up-regulation of T helper type 1 specific immune responses. Vet Immunol Immunopathol 2014; 161:193-204. [PMID: 25193467 DOI: 10.1016/j.vetimm.2014.08.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 05/27/2014] [Revised: 08/08/2014] [Accepted: 08/12/2014] [Indexed: 12/31/2022]
Abstract
Honeybee (Apis melifera) venom (HBV), which includes melittin and lipid-soluble ingredients (chrysin and pinocembrin), elicited increases in the CD4(+)/CD8(+) T lymphocyte ratio, relative mRNA expression levels of the T helper type 1 (Th 1) cytokines (interferon-γ and IL-12) and reinforced viral clearance of an experimental porcine reproductive and respiratory syndrome (PRRS) virus infection in our previous study. On the basis of that previous study, we have now developed poly-d,l-lactide-co-glycolide (PLGA)-encapsulated HBV nanoparticles (P-HBV) for longer sustained release of HBV. We administered P-HBV to pigs via the rectal route, and then evaluated the potential immune-enhancing and bacterial clearance effects of P-HBV against Salmonella enterica serovar Typhimurium. The CD4(+)/CD8(+) lymphocyte ratio, proliferative capacity of peripheral blood lymphocytes and relative mRNA expression levels of IFN-γ and IL-12 (produced mainly by Th1 lymphocytes) were significantly increased in the P-HBV group up to 2 weeks post-administration of P-HBV. After S. Typhimurium infection, the P-HBV group showed a marked reduction in microbial burden in feces and all tissue samples (including the ileum, cecum, colon, and mesenteric lymph node (MLN)), a significant increase in Th 1 cytokines (IFN-γ, IL-2, and IL-12) and a marked decrease in a Th 2 cytokine (IL-4) in all tissue samples and peripheral blood lymphocytes. Thus, P-HBV may be a promising strategy for immune enhancement and prevention of S. Typhimurium or other bacterial infections.
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Affiliation(s)
- Jin-A Lee
- Department of Veterinary Infectious Diseases, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Bock-Gie Jung
- Department of Pulmonary Immunology, University of Texas Health Science Center at Tyler, 11937 US Hwy 271, Tyler, TX 75708-3154, USA
| | - Tae-Hoon Kim
- Department of Veterinary Infectious Diseases, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Yun-Mi Kim
- Department of Veterinary Infectious Diseases, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Min-Ho Park
- College of Pharmacy and Institute of Drug Research & Development, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Pung-mi Hyun
- Wissen Co., Ltd, #410 Bio Venture Town, 461-8, Daejeon 305-811, Republic of Korea
| | - Jong-woon Jeon
- Wissen Co., Ltd, #410 Bio Venture Town, 461-8, Daejeon 305-811, Republic of Korea
| | - Jin-kyu Park
- Wissen Co., Ltd, #410 Bio Venture Town, 461-8, Daejeon 305-811, Republic of Korea
| | - Cheong-Weon Cho
- College of Pharmacy and Institute of Drug Research & Development, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Guk-Hyun Suh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Bong-Joo Lee
- Department of Veterinary Infectious Diseases, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Republic of Korea.
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Ahn KS, Oh DS, Ahn AJ, Suh GH, Shin SS. First record of Bourgelatia diducta (Nematoda: Chabertiidae) from wild boars in the Republic of Korea. Korean J Parasitol 2013; 51:441-8. [PMID: 24039287 PMCID: PMC3770875 DOI: 10.3347/kjp.2013.51.4.441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 06/07/2013] [Accepted: 06/14/2013] [Indexed: 12/02/2022]
Abstract
This study describes the first record of Bourgelatia diducta (Nematoda: Chabertiidae) from wild boars in the Republic of Korea (=South Korea). Gastrointestinal tracts of 87 Korean wild boars (Sus scrofa coreanus) hunted in mountains in the south-western part of South Korea between 2009 and 2012 were examined for their visceral helminths. B. diducta, as identified by morphological characteristics of the head and tail, were recovered from the large intestine of 47 (54%) wild boars. The average length of adult female worms was 11.3±0.87 mm and the thickest part of the body measured 0.54±0.04 mm in maximum width, while those of males were 9.8±0.72 and 0.45±0.03 mm, respectively. The characteristic J-shaped type II ovejector was observed in females, and the type II dorsal ray with 2 rami on each side of the median fissure was uniquely seen in males. The buccal capsule was small, relatively thin-walled, cylindrical, very short, and ring-shaped. The externodorsal ray arose from a common stem with the dorsal ray. The cervical groove was absent. The anterior extremity was equipped with 20-22 external corona radiata, 4 cephalic papillae and 2 lateral amphids around the mouth. The eggs were 66.0×38.9 µm in average size. By the present study, B. diducta (Nematoda: Chabertiidae) is recorded for the first time in South Korea. Additionally, morphological characteristics and identification keys provided in the present study will be helpful in the faunistic or taxonomic studies for strongylid nematodes related.
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Affiliation(s)
- Kyu-Sung Ahn
- Biotherapy Human Resources Center, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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Jung BG, Lee JA, Park SB, Hyun PM, Park JK, Suh GH, Lee BJ. Immunoprophylactic effects of administering honeybee (Apis melifera) venom spray against Salmonella gallinarum in broiler chicks. J Vet Med Sci 2013; 75:1287-95. [PMID: 23719751 PMCID: PMC3942925 DOI: 10.1292/jvms.13-0045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Antibiotics continue to be used as growth promoters in the poultry industry. Honeybee
(Apis melifera) venom (HBV) possesses a number of beneficial biological
activities, particularly for regulating the immune system. The aim of the present study
was to evaluate the immunoprophylactic effects of HBV against Salmonella
Gallinarum in broiler chicks as an initial step towards developing eco-friendly
alternatives to reduce antibiotic use. HBV was administered using a spray technique. HBV
improved body weight gain, particularly in the presence of infection. Moreover, HBV
enhanced antibody production activity against formalin-killed S.
Gallinarum. The CD4+:CD8+ T lymphocyte ratio, relative mRNA
expression levels of interleukin-18 and interferon-γ, and serum lysozyme activity also
increased following HBV administration before the infection period as well as during
infection. HBV reinforced bacterial clearance and increased survivability against
S. Gallinarum. Corresponding pathological analyses demonstrated that
the HBV-sprayed group displayed mild and less severe abnormal changes compared with those
in the control group. It was presumed that the prophylactic effects of HBV against
S. Gallinarum were associated with its non-specific immune response
stimulating activity. Thus, HBV may provide an alternative to reduce antibiotic use in the
poultry industry.
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Affiliation(s)
- Bock-Gie Jung
- College of Veterinary Medicine, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea
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Suh GH, Hur TY, Lim S, Shin SM, Kwon J, Cho SH, Lee CY, Shin SS. The first outbreak of Chorioptes texanus (Acari: Psoroptidae) infestation in a cattle farm in Korea. Korean J Parasitol 2008; 46:273-8. [PMID: 19127336 DOI: 10.3347/kjp.2008.46.4.273] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Accepted: 11/21/2008] [Indexed: 11/23/2022]
Abstract
Mites in the genus Chorioptes cause a mild form of skin disease in both domestic and wild ruminants. In July 2006, dermatitis characterized by alopecia, marked lichenification, accumulation of crust, and fissuring was recognized in 14 out of 200 Holstein dairy cattle raised in the cattle farm of the National Institute of Animal Science in Cheonan, Republic of Korea. Skin lesions were distributed mainly over the tail base, and sacral and perineal regions. Microscopic examinations of skin scraping samples from severely affected areas revealed numerous mites of all developmental stages. Morphologically, pedicels of the mites were short and unjointed. The tarsal suckers occurred on the pedicels of all the legs in the male worm and on the first, second, and fourth pair of legs in the adult female worm. A single long seta at the tarsus of legs III and the length of legs II being about twice as long as legs IV in adult male mites were observed. Arising anterior to the inner-most spatulate seta was a short seta with an average of 26.4 +/- 5.8 microm in length. Also, the length of setae #4 on the opisthosomal lobes was relatively short. Based on these observations, the mites were identified as Choriptes texanus. Although the chorioptic mange may not influence the mortality rate in the affected farm, reports indicate that a decline in milk production can be observed. This is the first report of chorioptic infestation in a cattle farm from Korea.
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Affiliation(s)
- Guk-Hyun Suh
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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Khan MA, Lee HJ, Lee WS, Kim HS, Ki KS, Hur TY, Suh GH, Kang SJ, Choi YJ. Structural growth, rumen development, and metabolic and immune responses of Holstein male calves fed milk through step-down and conventional methods. J Dairy Sci 2007; 90:3376-87. [PMID: 17582123 DOI: 10.3168/jds.2007-0104] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Structural growth, feed consumption, rumen development, metabolic response, and immune response were studied in Holstein calves fed milk through either a conventional method or a step-down (STEP) method. In the conventional method, calves (n = 20) were fed colostrum and then milk at a rate of 10% of their BW for the entire period of 44 d. In the STEP method, calves (n = 20) were given colostrum and then milk at a rate of 20% of their BW for 23 d, which was reduced (between d 24 to 28) to 10% of their BW for the remaining 16 d. The calves on both methods were weaned gradually by diluting milk with water between d 45 and 49. After weaning, feed consumption, structural growth, and body weight gain were monitored until calves were 63 d of age. At d 63, twelve calves (6/treatment) were euthanized and rumen papillae length, papillae width, rumen wall thickness, and emptied forestomach weight were recorded. At wk 4, 7, and 9, ruminal contents were collected to enumerate rumen metabolites. The STEP-fed calves consumed a greater amount of milk than conventionally fed calves during the pre-STEP (d 1 to 28), post-STEP (d 29 to 49), and preweaning (d 1 to 49) periods. Consumption of starter and hay was greater during the pre-STEP period and lesser during the post-STEP and postweaning (d 50 to 63) periods in calves on the conventional method than on the STEP method. Body weight gain and structural growth measurements of calves were greater on the STEP method than on the conventional method. A hypophagic condition caused by greater milk consumption depressed solid feed intake of STEP-fed calves during the pre-STEP period, and a hyperphagic response caused by a reduced nutrient supply from milk triggered their consumption of solid feed during the post-STEP and postweaning periods. Ruminal pH and concentrations of ammonia, total volatile fatty acids, acetate, propionate, butyrate, and plasma beta-hydroxybutyrate were higher in calves on the STEP method and at weaning and postweaning (d 63) were lower in calves on the conventional method. Emptied weight of the forestomach, rumen wall thickness, papillae length, papillae width, and papillae concentration were higher in calves on the STEP method than in those on the conventional method. Blood glucose was lower, and blood urea nitrogen and beta-hydroxybutyrate at weaning and postweaning were higher in STEP-fed calves. Serum IgG, IgA, and triglycerides for 1, 2, and 3 wk of age were higher in calves on the STEP method than in those on the conventional method. In conclusion, greater feed consumption, BW gain, and structural growth, and a more metabolically and physically developed rumen were observed in calves on the STEP method than in those on the conventional method.
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Affiliation(s)
- M A Khan
- Dairy Cattle Research Division, National Livestock Research Institute, Cheonan, 330-880, Republic of Korea
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Son DS, Choe CY, Choi SH, Rae-Cho S, Kim HJ, Han MH, Ryu IS, Suh GH, Kim UH, Kim IH. Effect of estradiol benzoate or GnRH treatment prior to superstimulation in CIDR-treated, Korean native cows (Bos taurus). Anim Reprod Sci 2007; 100:14-21. [PMID: 16876342 DOI: 10.1016/j.anireprosci.2006.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2006] [Revised: 05/15/2006] [Accepted: 06/12/2006] [Indexed: 10/24/2022]
Abstract
The objective of this study was to evaluate the effectiveness of superovulatory protocols by synchronizing the emergence of the follicular wave using estradiol benzoate (EB) or GnRH in CIDR-treated, Korean cows. Sixty-six cows were used in the study and these were divided into three groups. The standard group comprised cows that were between days 8 and 12 of their estrous cycle (n=22). The remaining 44 cows, at all other stages of the estrous cycle, received CIDR and were assigned to two treatment groups that received either 2mg EB (EB-CIDR group, n=22) or 100 microg GnRH (GnRH-CIDR group, n=22) 1 day after CIDR insertion. Gonadotropin treatment began between the 8th and 12th days of the estrous cycle in the standard group, 5 days after EB injection in the EB-CIDR group, and 3 days after GnRH injection in the GnRH-CIDR group. All cows were superovulated with porcine FSH (pFSH) twice daily, with the dose (total 28 mg) decreasing gradually over 4 days. On the 5th and 6th injections of pFSH, 25 and 15 mg doses of PGF(2alpha) were administered. CIDR was withdrawn at the 7th pFSH injection and the cows received 200 microg GnRH at 24h after CIDR withdrawal. Cows were artificially inseminated twice at 36 and 48 h post-CIDR withdrawal and embryos were recovered 7 days after the 1st insemination. The numbers of preovulatory follicles (22.9-28.2), ovulated preovulatory follicles (17.6-21.7) and CL (15.9-17.9) detected by ultrasonography did not differ among groups (P>0.05). Similarly, the numbers of total ova (6.7-10.0), transferable embryos (4.0-6.0), degenerate embryos (1.1-1.8) and unfertilized ova (1.3-4.3) did not differ among groups (P>0.05). Progesterone and estradiol concentrations during superovulation treatments and at embryo recovery were also the same in all groups (P>0.05). We conclude that in CIDR-treated Korean native cows, superovulatory treatments that follow administration of either EB or GnRH (at any stage of the estrous cycle) result in both a superovulatory response and embryo yield comparable to conventional superovulation protocols.
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Affiliation(s)
- Dong-Soo Son
- Animal Genetic Resources Station, NLRI, Namwon, Jeonbuk 590-832, South Korea
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Kim UH, Suh GH, Hur TY, Kang SJ, Kang HG, Park SB, Kim HS, Kim IH. Comparison of two types of CIDR-based timed artificial insemination protocols for repeat breeder dairy cows. J Reprod Dev 2007; 53:639-45. [PMID: 17327684 DOI: 10.1262/jrd.18147] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study compared two types of controlled internal drug release (CIDR)-based timed artificial insemination (TAI) protocol for treatment of repeat breeder dairy cows. In the first trial of the experiment, 55 repeat breeder cows were randomly assigned to the following two treatments. (1) In the EB group, a CIDR device was inserted into the cows, and then the cows were administered an injection of 1 mg estradiol benzoate (EB) plus 50 mg progesterone (P4; Day 0). On Day 7, they were given an injection of PGF(2alpha) and the CIDR device was removed. The cows were given an injection of 1 mg EB on Day 8 and were subjected to TAI 30 h later (n=27). (2) In the gonadotrophin releasing hormone (GnRH) group, a CIDR device was inserted into the cows, and then the cows were administered an injection of 250 microg gonadorelin (GnRH; Day 0). On Day 7, they were given an injection of PGF(2alpha) and the CIDR device was removed. The cows were given an injection of 250 microg GnRH on Day 9 and were subjected to TAI 17 h later (n=28). In the second trial, 41 repeat breeder cows that were confirmed as not pregnant in the first trial were randomly assigned to the same two treatments used in the first trial (an EB group of 20 cows and a GnRH group of 21 cows). The ovaries of 15 cows from each group were examined by transrectal ultrasonography in order to observe the changes in ovarian structures, and blood samples were collected for analysis of serum P4 concentrations. The pregnancy rates following TAI in the first (18.5 vs. 32.1%) and second (40.0 vs. 38.1%) trials and the combined rates (27.7 vs. 34.7%) did not differ between the EB and GnRH groups. The proportions of cows with follicular wave emergence within 7 days did not differ between the EB (12/15) and GnRH groups (13/15). The interval to wave emergence was shorter (P<0.01) in the GnRH group than in the EB group, but there was no difference in the mean diameters of dominant follicles on Day 7 between the groups. Moreover, the proportions of cows with synchronized ovulation following a second EB or GnRH treatment did not differ between the groups. In conclusion, treatment with either EB or GnRH in a CIDR-based TAI protocol results in synchronous follicular wave emergence, follicular development, synchronous ovulation, and similar pregnancy rates for TAI in repeat breeder cows.
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Affiliation(s)
- Ui-Hyung Kim
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungbuk National University, Korea
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Kim UH, Suh GH, Hur TY, Kang SJ, Kang HG, Park SB, Kim HS, Kim IH. The Effects of Administering Estradiol Benzoate Plus Progesterone During the Growth or Static Phases of the Dominant Follicle in CIDR-Treated Lactating Dairy Cows. J Reprod Dev 2007; 53:591-6. [PMID: 17310079 DOI: 10.1262/jrd.18138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We studied the effects of administering estradiol benzoate (EB) plus progesterone (P4) as part of a CIDR-based protocol during the growth or static phases of dominant follicle development on follicular wave emergence, follicular growth, synchrony of ovulation and pregnancy rate following CIDR withdrawal, treatment with PGF(2alpha) and GnRH, and fixed-time artificial insemination (TAI). Forty-one previously synchronized lactating Holstein dairy cows were randomly allocated to three treatment groups. The control group (n=14) received a CIDR on the third day after ovulation only (Day 0). The two treatment groups were administered CIDRs comprising 2 mg EB and 50 mg P4 either on the third (T1, n=14) or eighth day (T2, n=13) after ovulation (Day 0). All cows received PGF(2alpha) after CIDR removal on Day 7, GnRH on Day 9, and TAI 16 h after GnRH treatment. The proportion of cows with follicular wave emergence within 8 days of treatment differed (P<0.01) among the control (14.3%), T1 (85.7%), and T2 groups (92.9%). However, the mean intervals between treatment and wave emergence were not significantly different. There were significant differences in the diameters of the dominant follicles on Day 7 (P<0.01) and in preovulatory follicles on Day 9 (P<0.01), with the largest follicles observed in the control group and the smallest follicles observed in the T2 group. In contrast, the numbers of cows showing synchronous ovulation after GnRH treatment (92.9 to 100.0%) and pregnancy following TAI (46.2 to 50.0%) were similar between the treatment groups. The results showed that, irrespective of the phase (growth or static) of the dominant follicle, administration of 2 mg EB plus 50 mg P4 to CIDR-treated lactating dairy cows induced consistent follicular wave emergence and development, synchronous ovulation after GnRH administration, and similar pregnancy rates following TAI.
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Affiliation(s)
- Ui-Hyung Kim
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungbuk National University, Korea
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Kim IH, Suh GH, Kim UH, Kang HG. A CIDR-based timed AI protocol can be effectively used for dairy cows with follicular cysts. Anim Reprod Sci 2006; 95:206-13. [PMID: 16288840 DOI: 10.1016/j.anireprosci.2005.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2005] [Accepted: 10/06/2005] [Indexed: 11/29/2022]
Abstract
The present study evaluated whether a controlled internal drug release (CIDR)-based timed AI (TAI) protocol could be used as an efficient tool for the treatment of ovarian follicular cysts in lactating dairy cows. In the first experiment, lactating dairy cows diagnosed with follicular cysts were randomly assigned to two treatments: (1) a single injection of GnRH at diagnosis (Day 0) and AI at estrus (AIE) within 21 days (GnRH group, n=70), or (2) insertion of a CIDR device containing progesterone and an injection of GnRH on Day 0, PGF(2alpha) injection at the time of CIDR removal on Day 7, GnRH injection on Day 9, and TAI 16h after the GnRH injection (CIDR-based TAI group, n=65). Conception rate after the CIDR-based TAI protocol (52.3%) was greater (P<0.05) than that after AIE following a single GnRH injection (26.9%). In the second experiment, lactating dairy cows diagnosed with follicular cysts (Cyst group, n=16) and cows having normal estrous cycles (CYC group, n=15) received the same treatment: a CIDR device containing progesterone and an injection of GnRH on Day 0, PGF(2alpha) injection at the time of CIDR removal on Day 7, and GnRH injection on Day 9. The proportion of cows with follicular wave emergence and the interval from treatment to follicular wave emergence did not differ (P>0.05) between groups. The mean diameters of dominant follicles on Days 4 and 7 as well as preovulatory follicles on Day 9, and the synchrony of ovulation following the second injection of GnRH did not differ (P>0.05) between groups. These data suggest that the CIDR-based TAI protocol results in an acceptable conception rate in dairy cows with follicular cysts.
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Affiliation(s)
- Ill-Hwa Kim
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, South Korea.
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Kim UH, Suh GH, Nam HW, Kang HG, Kim IH. Follicular wave emergence, luteal function and synchrony of ovulation following GnRH or estradiol benzoate in a CIDR-treated, lactating Holstein cows. Theriogenology 2005; 63:260-8. [PMID: 15589289 DOI: 10.1016/j.theriogenology.2004.04.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2003] [Revised: 04/12/2004] [Accepted: 04/24/2004] [Indexed: 12/01/2022]
Abstract
This study evaluated the effect of GnRH or estradiol benzoate (EB) on follicular wave emergence and progesterone concentrations, and following a second injection of GnRH, synchrony of ovulation, and pregnancy rates in a controlled internal drug release (CIDR)-based timed AI (TAI) protocol in lactating Holstein cows. Cows received a CIDR device without hormone (controls), with an injection of 100 microg GnRH or with an injection of 4 mg EB. Thereafter, all received PGF(2 alpha) at the time of CIDR removal on Day 7, GnRH on Day 9, and TAI 16 h later. Follicular wave emergence occurred within 7 days in 19/20 GnRH-treated, 14/20 EB-treated and 5/20 control cows (P < 0.05). The interval to wave emergence was the shorter and less variable (P < 0.01) in the GnRH group (2.9 +/- 0.2 days) than in the EB (4.7 +/- 0.5 days) or control (4.8 +/- 1.0 days) groups. Serum progesterone concentrations from Days 4 to 7 were higher (P < 0.01) in the GnRH-treated cows that ovulated than in those that did not ovulate, or in control and EB-treated cows. The diameters of dominant follicle on Day 7 differed among groups (P < 0.01), and the diameters of the preovulatory follicle on Day 9 were larger (P < 0.01) in the control and GnRH groups than in the EB group. The proportion of cows with synchronized ovulations did not differ among groups, but pregnancy rate to TAI was higher (P < 0.05) in the GnRH group (65%; 13/20) than in the control (30%; 6/20) or EB (35%; 7/20) groups. Results suggest that GnRH treatment of CIDR-treated lactating Holstein cows will result in synchronous follicular wave emergence, large preovulatory follicles and synchronous ovulation, resulting in an acceptable pregnancy rates to TAI.
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Affiliation(s)
- Ui-Hyung Kim
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, South Korea
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Suh GH, Hur TY, Son DS, Choe CY, Jung YH, Ahn BS, Lee CY, Lee CG. Differences in the serum immunoglobulin concentrations between dairy and beef calves from birth to 14 days of age. J Vet Sci 2003; 4:257-60. [PMID: 14685031] [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: 04/27/2023] Open
Abstract
The changes in serum levels of immunoglobulins G, M and A of dairy and beef calves of well-managed herds were monitored from birth to 14 days post partum using single radial immunodiffusion. Serum levels of all three immunoglobulin classes reached its peak at 24 hours in both groups of calves after birth, at which time there were very high levels of each immunoglobulin present. The mean IgM and IgA levels of the two groups became same at 6 days and 8 days of age, respectively but the mean IgG level of beef calves was approximately twice that of dairy calves throughout the experiment.
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Affiliation(s)
- Guk-Hyun Suh
- National Livestock Research Institute, RDA, Cheonan 330-800, Korea
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Suh GH, Shah A. A review of the epidemiological transition in dementia--cross-national comparisons of the indices related to Alzheimer's disease and vascular dementia. Acta Psychiatr Scand 2001; 104:4-11. [PMID: 11437743 DOI: 10.1034/j.1600-0447.2001.00210.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To examine temporal changes in the prevalence of dementia and associated factors. METHOD All publications on the epidemiology of dementia were identified using a medline search for the years 1966-1999. RESULTS Alzheimer's disease (AD) has become nearly twice as prevalent as vascular dementia (VaD) in Korea, Japan, and China since transition in early 1990s. Prior to this, in the 1980s, VaD was more prevalent than AD in these countries. In Nigeria, the prevalence of dementia was low. Indian studies were contradictory, with both AD and VaD being more prevalent in different studies. American and European studies consistently reported AD to be more prevalent than VaD. CONCLUSION A theoretical model of transition from low incidence-high mortality society to high incidence-high mortality society to low incidence-low mortality society may explain these findings. Rigorous testing in prospective, longitudinal and population-based cross-national studies using culture-fair diagnostic instruments is required.
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Affiliation(s)
- G H Suh
- Department of Psychiatry, Hallym University College of Medicine, Hangang Sacred Heart Hospital, Seoul, Korea
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Kim IH, Son DS, Yeon SH, Choi SH, Park SB, Ryu IS, Suh GH, Lee DW, Lee CS, Lee HJ, Yoon JT. Effect of dominant follicle removal before superstimulation on follicular growth, ovulation and embryo production in Holstein cows. Theriogenology 2001; 55:937-45. [PMID: 11291916 DOI: 10.1016/s0093-691x(01)00455-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study was to investigate whether removing the dominant follicle 48 h before superstimulation influences follicular growth, ovulation and embryo production in Holstein cows. After synchronization, ovaries were scanned to assess the presence of a dominant follicle by ultrasonography with a real-time linear scanning ultrasound system on Days 4, 6 and 8 of the estrus cycle (Day 0 = day of estrus). Twenty-six Holstein cows with a dominant follicle were divided into 2 groups in which the dominant follicle was either removed (DFR group, n=13) by ultrasound-guided follicular aspiration or left intact (control group, n=13) on Day 8 of the estrus cycle. Superovulation treatment was initiated on Day 10. All donors were superovulated with injections of porcine FSH (Folltropin) twice daily with constant doses (total: 400 mg) over 4 d. On the 6th and 7th injections of Folltropin, 30 mg and 15 mg of PGF2alpha (Lutalyse) were given. Donors were inseminated twice at 12 h and 24 h after the onset of estrus. Embryos were recovered on Day 6 or 7 after AI. During superstimulation, the number of follicles 2 to 5 mm (small), 6 to 9 mm (medium) and > or = 10 mm (large) was determined by ultrasonography on a daily basis. At embryo recovery, the number of corpora lutea (CL) was also determined by ultrasonography and blood samples were collected for analysis of progesterone concentration. Follicular growth during superstimulation was earlier in the DFR group than in the control group. The number of medium and large follicles was greater (P < 0.01) in the DFR group than in the control group on Days 1 to 2 and Days 3 to 4 of superstimulation, respectively. The numbers of CL (9.6+/-1.1 vs 6.1+/-0.9) and progesterone concentration (30.9+/-5.4 vs 18.6+/-3.5 ng/mL) were greater (P < 0.05) in the DFR group than in the control group, respectively. The numbers of total ova (7.7+/-1.3 vs 3.9+/-1.0) and transferable embryos (4.6+/-0.9 vs 2.3+/-0.8) were also greater (P < 0.05) in the DFR group than in the control group, respectively. It is concluded that the removal of the dominant follicle 48 h before superstimulation promoted follicular growth, and increased ovulation and embryo production in Holstein cows.
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Affiliation(s)
- I H Kim
- National Livestock Research Institute, RDA, Cheonan, Chungnam, Korea
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Abstract
The prevalence and correlates of symptoms of depression in a nationwide sample of Korean adults, collected during the National Health and Health Behavior Examination Survey, were examined. A probability sample of 3,711 respondents (a response rate of 81.3%) completed the Center for Epidemiologic Studies Depression Scale (CES-D) and a variety of sociodemographic questions. In this sample 23.1% of males and 27.4% of females had scores above the cutoff point of 16 (probable depression) on the CES-D scale, and 6.8% of males and 10.4% of females were above the cutoff point of 25 (severe, definite depression). Apart from a few reports describing Afro-American and Puerto-Rican samples, these rates were somewhat higher than those found in the US and Western countries. In this report, female gender, fewer than 13 years of education, and disrupted marriage (widowed/divorced/separated) proved to be statistically significant predictors of severe, definite symptoms of depression.
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Affiliation(s)
- M J Cho
- Department of Psychiatry, College of Medicine, Seoul National University, Korea.
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Kim IH, Son DS, Lee HJ, Yang BC, Lee DW, Suh GH, Lee KW, Jung SC. Bacteria in semen used for IVF affect embryo viability but can be removed by stripping cumulus cells by vortexing. Theriogenology 1998; 50:293-300. [PMID: 10734497 DOI: 10.1016/s0093-691x(98)00137-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Bacterial contamination of in vitro vs in vivo produced embryos presents a particular danger because of the alteration of the zona pellucida and the use of various biological products during culture. Our objective was to investigate the effects of semen contaminated with bacteria on IVF of bovine oocytes and to determine if removal of cumulus cells by vortexing as opposed to pipetting would reduce contamination and improve subsequent embryonic development. Semen from 5 bulls of the Native Korean breed (Bulls A, B, C, D, E) was used for IVF of matured oocytes. Preliminary studies had shown that the semen from Bulls A, B, D and E but not Bull C was contaminated with various species of common bacteria. After IVF, the cumulus cells surrounding the oocytes were removed either by pipetting or vortexing. Viability and cleavage rates of the resulting zygotes was assessed after 44 h in culture. When cumulus cells were removed by pipetting, only zygotes derived from oocytes that were fertilized with uncontaminated semen from Bull C developed to morula and blastocyst stages; zygotes derived from oocytes that were fertilized with contaminated semen from Bulls A, B, D and E started to degenerate, and the culture media became noticeably turbid. When cumulus cells were removed by vortexing, zygotes derived from oocytes fertilized with either contaminated or uncontaminated semen showed good rates of development (16 to 32%) to morula or blastocyst stages. From these results it can be concluded that the bacteria introduced with the semen contaminated the in vitro system and severely reduced the viability of the embryos. In contrast, complete removal of the cumulus cells with vortexing, as opposed to pipetting, reduced the contamination of the culture medium, allowing embryonic development to take place.
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Affiliation(s)
- I H Kim
- National Livestock Research Institute, RDA, Cheonan, Korea
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Jackson WR, Perlmutter P, Suh GH, Tasdelen EE. The Stereochemistry of Organometallic Compounds. XXXVII. Regio and Stereo-control in the Rhodium-Catalyzed Hydroformylation of Some Alkenylphosphines. Aust J Chem 1991. [DOI: 10.1071/ch9910951] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Good to excellent regiocontrol can be obtained for the internal product of rhodium- catalysed hydroformylation of a range of alkenylphosphines. Excellent stereo- as well as regio-control can also be obtained for reactions of some cyclic alkenylphosphines.
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