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Mabreja AD, Reyes VP, Soe TK, Shimakawa K, Makihara D, Nishiuchi S, Doi K. Evaluation of Grain-Filling-Related Traits Using Taichung 65 x DV85 Chromosome Segment Substitution Lines (TD-CSSLs) of Rice. Plants (Basel) 2024; 13:289. [PMID: 38256843 PMCID: PMC10818708 DOI: 10.3390/plants13020289] [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] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024]
Abstract
Grain yield of rice consists of sink capacity and grain filling. There are some genes known to contribute to sink capacity, but few genes associated with grain filling are known. We conducted a genetic analysis on yield-related traits by using a chromosome segment substitution line population that have introgression from DV85, an aus variety of rice, in the background of T65, a japonica variety. Refined whole-genome genotypes of the 43 TD-CSSLs were obtained by genotyping-by-sequencing. The effects of previously detected quantitative trait loci (QTLs), qNSC1 and qNSC2, were confirmed by the amount of non-structural carbohydrate (NSC) at 5 days after heading (DAH). The CSSL for qSWTR11, the QTL for decrease in shoot weight during the maturity stage, showed the highest NSC at 5 DAH and lowest at 35 DAH. The brown rice yield of these lines were not stably significant. Most of the sink-related traits correlated between the 2 tested years, but most of the grain-filling traits did not show correlation between the 2 years. Correlation analysis revealed that the sink capacity is stable and primarily determines the yield, and grain filling is more affected by the environment. In addition, biomass production before heading and during the maturity stage contributes to higher yield in TD-CSSLs, and the amount of translocation of stem reserve does not affect much to the yield. We conclude that higher NSC at the heading stage and rapid decrease in shoot biomass during the maturity stage did not directly contribute to the yield formation in the japonica genetic background.
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Affiliation(s)
- Abebaw Dessie Mabreja
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
- Ethiopian Institute of Agricultural Research, Fogera National Rice Research and Training Center, Bahir Dar 1937, Ethiopia
| | - Vincent Pamugas Reyes
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
| | - Than Kutay Soe
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
| | - Kodai Shimakawa
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
| | - Daigo Makihara
- International Center for Research and Education in Agriculture, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan;
| | - Shunsaku Nishiuchi
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
| | - Kazuyuki Doi
- Graduate School of Bioagicultural Science, Nagoya University, Chikusa, Nagoya 464-8601, Aichi, Japan; (A.D.M.); (V.P.R.); (K.S.); (S.N.)
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Reyes VP. Correction to: Fantastic genes: where and how to find them? Exploiting rice genetic resources for the improvement of yield, tolerance, and resistance to a wide array of stresses in rice. Funct Integr Genomics 2023; 23:251. [PMID: 37480407 DOI: 10.1007/s10142-023-01182-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2023]
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Reyes VP. Fantastic genes: where and how to find them? Exploiting rice genetic resources for the improvement of yield, tolerance, and resistance to a wide array of stresses in rice. Funct Integr Genomics 2023; 23:238. [PMID: 37439874 DOI: 10.1007/s10142-023-01159-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023]
Abstract
Rice production is a critical component of global food security. To date, rice is grown in over 100 countries and is the primary source of food for more than 3 billion people. Despite its importance, rice production is facing numerous challenges that threaten its future viability. One of the primary problems is the advent of climate change. The changing climatic conditions greatly affect the growth and productivity of rice crop and the quality of rice yield. Similarly, biotic stresses brought about by pathogen and pest infestations are greatly affecting the productivity of rice. To address these issues, the utilization of rice genetic resources is necessary to map, identify, and understand the genetics of important agronomic traits. This review paper highlights the role of rice genetic resources for developing high-yielding and stress-tolerant rice varieties. The integration of genetic, genomic, and phenomic tools in rice breeding programs has led to the development of high-yielding and stress-tolerant rice varieties. The collaboration of multidisciplinary teams of experts, sustainable farming practices, and extension services for farmers is essential for accelerating the development of high-yielding and stress-tolerant rice varieties.
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Tomita R, Reyes VP, Fukuta Y, Gichuhi EW, Kikuta M, Menge DM, Doi K, Makihara D. Genetic Variation of Blast ( Pyricularia oryzae Cavara) Resistance in the Longistaminata Chromosome Segment Introgression Lines (LCSILs) and Potential for Breeding Use in Kenya. Plants (Basel) 2023; 12:863. [PMID: 36840212 PMCID: PMC9966461 DOI: 10.3390/plants12040863] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/01/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
In Kenya's rice-growing areas, Basmati varieties have been produced in monoculture since the late 1980s. This has resulted in the breakdown of the resistance (R) gene-mediated response of the local Basmati varieties to blast disease caused by Pyricularia oryzae. To improve blast resistance in Kenyan Basmati varieties, continuous identification of R genes and suitable breeding materials for Basmati are necessary. Longistaminata chromosome segment introgression lines (LCSILs) with the Kernel Basmati genetic background, developed using a rice line called potential low-input adaptable-1 (pLIA-1) derived from a cross between Taichung 65 (T65) (a rice variety in the Japonica Group) and O. longistaminata, are expected to contain useful blast R genes derived from O. longistaminata or T65. In this study, we investigated the genetic variation of blast R genes in LCSILs and their parents by using a new international differential system for designating blast races based on the gene-for-gene theory and molecular characterization using single nucleotide polymorphism (SNP) markers. LCSILs and their parents were classified into three groups-A, B1, and B2-based on reaction patterns to the standard differential blast isolates (SDBIs). Group A, including pLIA-1, showed the highest resistance in all groups, followed by groups B1 and B2. Kernel Basmati in group B1 was considered to possess Pik-p or Pi7(t), Pi19(t), and other unknown R genes. In addition to these R genes, LCSIL 6, 12, 27, 28, and 40, in group A, were determined to possess one of Pish, Piz-t, or both genes that confer resistance to the Kenyan blast races. These lines can be used for efficiently pyramiding blast R genes in the local Basmati varieties.
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Affiliation(s)
- Rena Tomita
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Vincent Pamugas Reyes
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Yoshimichi Fukuta
- Japan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan
| | - Emily Waringa Gichuhi
- Kenya Agricultural and Livestock Research Organization, Kerugoya P.O. Box 298-10300, Kenya
| | - Mayumi Kikuta
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - Daniel Makori Menge
- Kenya Agricultural and Livestock Research Organization, Kerugoya P.O. Box 298-10300, Kenya
| | - Kazuyuki Doi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Daigo Makihara
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya 464-8601, Japan
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Reyes VP, Kitony JK, Nishiuchi S, Makihara D, Doi K. Utilization of Genotyping-by-Sequencing (GBS) for Rice Pre-Breeding and Improvement: A Review. Life (Basel) 2022; 12:1752. [PMID: 36362909 PMCID: PMC9694628 DOI: 10.3390/life12111752] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 10/13/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 09/29/2023] Open
Abstract
Molecular markers play a crucial role in the improvement of rice. To benefit from these markers, genotyping is carried out to identify the differences at a specific position in the genome of individuals. The advances in sequencing technologies have led to the development of different genotyping techniques such as genotyping-by-sequencing. Unlike PCR-fragment-based genotyping, genotyping-by-sequencing has enabled the parallel sequencing and genotyping of hundreds of samples in a single run, making it more cost-effective. Currently, GBS is being used in several pre-breeding programs of rice to identify beneficial genes and QTL from different rice genetic resources. In this review, we present the current advances in the utilization of genotyping-by-sequencing for the development of rice pre-breeding materials and the improvement of existing rice cultivars. The challenges and perspectives of using this approach are also highlighted.
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Affiliation(s)
- Vincent Pamugas Reyes
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | | | - Shunsaku Nishiuchi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Daigo Makihara
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya 464-8601, Japan
| | - Kazuyuki Doi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
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Goto I, Neang S, Kuroki R, Reyes VP, Doi K, Skoulding NS, Taniguchi M, Yamauchi A, Mitsuya S. QTL analysis for sodium removal ability in rice leaf sheaths under salinity using an IR-44595/318 F 2 population. Front Plant Sci 2022; 13:1002605. [PMID: 36304401 PMCID: PMC9592983 DOI: 10.3389/fpls.2022.1002605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Over-accumulation of salt in rice plants is an effect of salt stress which decreases growth and grain yield. Salt removal ability in leaf sheaths is a tolerance mechanism to decrease salt entry and accumulation in leaf blades and maintain photosynthesis under salinity. In this study, a QTL analysis of removal ability of sodium ions (Na+) in leaf sheaths and Na+ accumulation-related traits, was conducted using F2 population between two rice varieties, IR-44595 with superior Na+ removal ability, and 318 with contrasting Na+ removal ability in leaf sheaths under salinity. Suggestive QTLs for Na+ removal ability in leaf sheaths were found on chromosomes 4 and 11. The suggestive QTL on chromosome 11 overlapped with other significant QTLs for Na+ concentration in shoots, leaf blades and leaf sheaths, and Na+/K+ ratio in leaf blades. Correlation analysis indicated that Na+ removal ability in leaf sheaths is important in reducing Na+ accumulation in leaf blades. The varietal difference of Na+ removal ability in leaf sheaths at the whole plant level was greater at lower NaCl concentrations and became smaller as the treatment NaCl concentration increased. Although the Na+ removal ability in leaf sheath was comparable between IR-44595 and 318 under high salinity at the whole plant level, the younger leaves of IR-44595 still showed a higher Na+ sheath-blade ratio than 318, which implied the Na+ removal ability functions in the younger leaves in IR-44595 to reduce Na+ entry in young leaf blades even under high salinity.
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Affiliation(s)
- Itsuki Goto
- Laboratory of Plant Physiology and Morphology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Sarin Neang
- Laboratory of Crop Stress Regulation, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Ministory of Agriculture, Forestry and Fishery, Phnom Penh, Cambodia
| | - Ryuichi Kuroki
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Vincent Pamugas Reyes
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Kazuyuki Doi
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | | | - Mitsutaka Taniguchi
- Laboratory of Plant Physiology and Morphology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Akira Yamauchi
- Laboratory of Crop Stress Regulation, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Shiro Mitsuya
- Laboratory of Plant Physiology and Morphology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Laboratory of Crop Stress Regulation, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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Farooqi MQU, Nawaz G, Wani SH, Choudhary JR, Rana M, Sah RP, Afzal M, Zahra Z, Ganie SA, Razzaq A, Reyes VP, Mahmoud EA, Elansary HO, El-Abedin TKZ, Siddique KHM. Recent developments in multi-omics and breeding strategies for abiotic stress tolerance in maize ( Zea mays L.). Front Plant Sci 2022; 13:965878. [PMID: 36212378 PMCID: PMC9538355 DOI: 10.3389/fpls.2022.965878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/23/2022] [Indexed: 06/12/2023]
Abstract
High-throughput sequencing technologies (HSTs) have revolutionized crop breeding. The advent of these technologies has enabled the identification of beneficial quantitative trait loci (QTL), genes, and alleles for crop improvement. Climate change have made a significant effect on the global maize yield. To date, the well-known omic approaches such as genomics, transcriptomics, proteomics, and metabolomics are being incorporated in maize breeding studies. These approaches have identified novel biological markers that are being utilized for maize improvement against various abiotic stresses. This review discusses the current information on the morpho-physiological and molecular mechanism of abiotic stress tolerance in maize. The utilization of omics approaches to improve abiotic stress tolerance in maize is highlighted. As compared to single approach, the integration of multi-omics offers a great potential in addressing the challenges of abiotic stresses of maize productivity.
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Affiliation(s)
| | - Ghazala Nawaz
- Department of Botanical and Environmental Sciences, Kohat University of Science and Technology, Kohat, Pakistan
| | - Shabir Hussain Wani
- Mountain Research Centre for Field Crops, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Jeet Ram Choudhary
- Division of Genetics, Indian Agricultural Research Institute, New Delhi, India
| | - Maneet Rana
- Division of Crop Improvement, ICAR-Indian Grassland and Fodder Research Institute, Jhansi, India
| | - Rameswar Prasad Sah
- Division of Crop Improvement, ICAR-National Rice Research Institute, Cuttack, India
| | - Muhammad Afzal
- College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Zahra Zahra
- Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, CA, United States
| | | | - Ali Razzaq
- Agronomy Department, University of Florida, Gainesville, FL, United States
| | | | - Eman A. Mahmoud
- Department of Food Industries, Faculty of Agriculture, Damietta University, Damietta, Egypt
| | - Hosam O. Elansary
- Plant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
- Floriculture, Ornamental Horticulture, and Garden Design Department, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria, Egypt
- Department of Geography, Environmental Management, and Energy Studies, University of Johannesburg, Johannesburg, South Africa
| | - Tarek K. Zin El-Abedin
- Department of Agriculture & Biosystems Engineering, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria, Egypt
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Than Kutay Soe, Kunieda M, Sunohara H, Inukai Y, Reyes VP, Nishiuchi S, Doi K. A Novel Combination of Genes Causing Temperature-Sensitive Hybrid Weakness in Rice. Front Plant Sci 2022; 13:908000. [PMID: 35837460 PMCID: PMC9274174 DOI: 10.3389/fpls.2022.908000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/26/2022] [Indexed: 09/29/2023]
Abstract
Reproductive isolation is an obstacle for plant breeding when a distant cross is demanded. It can be divided into two main types based on different growth stages: prezygotic isolation and postzygotic isolation. The hybrid weakness, which is a type of postzygotic isolation, can become a problem in crop breeding. In order to overcome reproductive isolation, it is necessary to elucidate its mechanism. In this study, genetic analysis for low temperature-dependent hybrid weakness was conducted in a rice F2 population derived from Taichung 65 (T65, Japonica) and Lijiangxintuanheigu (LTH, Japonica). The weak and severe weak plants in F2 showed shorter culm length, late heading, reduced panicle number, decreased grain numbers per panicle, and impaired root development in the field. Our result also showed that hybrid weakness was affected by temperature. It was observed that 24°C enhanced hybrid weakness, whereas 34°C showed recovery from hybrid weakness. In terms of the morphology of embryos, no difference was observed. Therefore, hybrid weakness affects postembryonic development and is independent of embryogenesis. The genotypes of 126 F2 plants were determined through genotyping-by-sequencing and a linkage map consisting of 862 single nucleotide polymorphism markers was obtained. Two major quantitative trait loci (QTLs) were detected on chromosomes 1 [hybrid weakness j 1 (hwj1)] and 11 [hybrid weakness j 2 (hwj2)]. Further genotyping indicated that the hybrid weakness was due to an incompatible interaction between the T65 allele of hwj1 and the LTH allele of hwj2. A large F2 populations consisting of 5,722 plants were used for fine mapping of hwj1 and hwj2. The two loci, hwj1 and hwj2, were mapped in regions of 65-kb on chromosome 1 and 145-kb on chromosome 11, respectively. For hwj1, the 65-kb region contained 11 predicted genes, while in the hwj2 region, 22 predicted genes were identified, two of which are disease resistance-related genes. The identified genes along these regions serve as preliminary information on the molecular networks associated with hybrid weakness in rice.
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Affiliation(s)
- Than Kutay Soe
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Department of Botany, University of Yangon, Yangon, Myanmar
| | - Mai Kunieda
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Hidehiko Sunohara
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Environmental Control Center Co., Ltd., Hachioji, Japan
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
| | - Vincent Pamugas Reyes
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Shunsaku Nishiuchi
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Kazuyuki Doi
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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Reyes VP, Raju BS, Wynne J, Stephenson LW, Raju R, Fromm BS, Rajagopal P, Mehta P, Singh S, Rao DP. Percutaneous balloon valvuloplasty compared with open surgical commissurotomy for mitral stenosis. N Engl J Med 1994; 331:961-7. [PMID: 8084354 DOI: 10.1056/nejm199410133311501] [Citation(s) in RCA: 299] [Impact Index Per Article: 10.0] [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: 01/28/2023]
Abstract
BACKGROUND Percutaneous balloon mitral valvuloplasty has been proposed as an alternative to open surgical commissurotomy for the treatment of rheumatic mitral-valve stenosis. METHODS We enrolled 60 patients with severe mitral stenosis and favorable valvular anatomy in a prospective, randomized trial comparing the two procedures. All patients underwent cardiac catheterization before the procedure and one week, six months, and three years thereafter. Hemodynamic data were analyzed by investigators who were blinded to the patients' treatment assignments. RESULTS Mitral-valve areas improved initially in both groups, from a mean (+/- SD) of 0.9 +/- 0.3 cm2 to 2.1 +/- 0.6 cm2 in the balloon-valvuloplasty group (30 patients; P < 0.01) and from 0.9 +/- 0.3 cm2 to 2.0 +/- 0.6 cm2 in the surgical group (30 patients; P < 0.001). Although improvement was maintained in both groups, mitral-valve areas were greater in the patients in the balloon-valvuloplasty group at three years (2.4 +/- 0.6 cm2, vs. 1.8 +/- 0.4 cm2 in the surgery group, P < 0.001). Restenosis occurred in three patients in the balloon-valvuloplasty group and four in the surgery group. One patient in the balloon-valvuloplasty group died of an apparent stroke after 2.5 years; four patients in the balloon-valvuloplasty group had residual atrial septal defects, and three patients (two in the balloon-valvuloplasty group and one in the surgery group) were judged to have severe mitral regurgitation. Seventy-two percent of the patients who underwent balloon valvuloplasty and 57 percent of the surgically treated patients were in New York Heart Association functional class I (i.e., they had no cardiovascular symptoms) at three years. No patient was lost to follow-up. CONCLUSIONS In the treatment of mitral stenosis, balloon valvuloplasty and open surgical commissurotomy have comparable initial results and low rates of restenosis, and both produce good functional capacity for at least three years. The potential complications associated with balloon valvuloplasty should be noted. The better hemodynamic results at three years, lower cost, and elimination of the need for thoracotomy suggest that balloon valvuloplasty should be considered for all patients with favorable mitral-valve anatomy.
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Affiliation(s)
- V P Reyes
- Division of Cardiology, Harper Hospital, Wayne State University School of Medicine, Detroit, MI 48201
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Turi ZG, Reyes VP, Raju BS, Raju AR, Kumar DN, Rajagopal P, Sathyanarayana PV, Rao DP, Srinath K, Peters P. Percutaneous balloon versus surgical closed commissurotomy for mitral stenosis. A prospective, randomized trial. Circulation 1991; 83:1179-85. [PMID: 2013139 DOI: 10.1161/01.cir.83.4.1179] [Citation(s) in RCA: 159] [Impact Index Per Article: 4.8] [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: 12/29/2022]
Abstract
BACKGROUND We performed a prospective, randomized trial comparing percutaneous balloon commissurotomy with surgical closed commissurotomy in 40 patients with severe rheumatic mitral stenosis. METHODS AND RESULTS Data were analyzed by investigators who were masked to treatment assignment or phase of study. Patients randomized to balloon (n = 20) or surgical (n = 20) commissurotomy had severe mitral stenosis without significant baseline differences (left atrial pressure, 26.1 +/- 4.2 versus 27.6 +/- 6.2 mm Hg; mitral valve gradient, 18.0 +/- 4.2 versus 19.7 +/- 6.3 mm Hg; mitral valve area, 1.0 +/- 0.2 versus 1.0 +/- 0.4 cm2, respectively). At 1-week follow-up after balloon commissurotomy, pulmonary wedge pressure was 14.3 +/- 7.2 mm Hg; mitral valve gradient was 9.6 +/- 5.1 mm Hg; and mitral valve area was 1.6 +/- 0.6 cm2 (all p less than 0.0001). At 1-week follow-up after surgical closed commissurotomy, wedge pressure was 13.7 +/- 5.4 mm Hg; mitral valve gradient was 9.4 +/- 4.2 mm Hg (both p less than 0.0001); and mitral valve area was 1.6 +/- 0.7 cm2 (p less than 0.003). At 8-month follow-up, improvement occurred in both groups: Mitral valve area was 1.6 +/- 0.6 cm2 in the balloon commissurotomy group (p less than 0.002) and was 1.8 +/- 0.6 cm2 in the surgical closed commissurotomy group (p less than 0.0001). There was no difference between the groups at 1-week or 8-month follow-up (all p greater than 0.4). One case of severe mitral regurgitation occurred in each group; complications were otherwise related to transseptal catheterization. There was no death, stroke, or myocardial infarction. Cost analysis revealed that balloon commissurotomy may substantially exceed the cost of surgical commissurotomy in developing countries, whereas it may represent a significant savings in industrialized nations. CONCLUSIONS We conclude that percutaneous balloon commissurotomy and surgical closed commissurotomy result in comparable hemodynamic improvement that is sustained through 8 months of follow-up.
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Affiliation(s)
- Z G Turi
- Department of Medicine, Harper Hospital, Detroit, MI 48201
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Spears JR, Reyes VP, Wynne J, Fromm BS, Sinofsky EL, Andrus S, Sinclair IN, Hopkins BE, Schwartz L, Aldridge HE. Percutaneous coronary laser balloon angioplasty: initial results of a multicenter experience. J Am Coll Cardiol 1990; 16:293-303. [PMID: 2197310 DOI: 10.1016/0735-1097(90)90576-b] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.1] [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: 12/30/2022]
Abstract
A multicenter clinical trial was initiated to test the potential safety and short-term efficacy of a percutaneous coronary application of laser balloon angioplasty, which has been shown experimentally to alleviate the common causes (dissection, recoil, thrombus) of suboptimal luminal results of conventional balloon angioplasty. Fifty-five patients, the majority (62%) of whom had relatively high risk lesions, were treated in 10 centers with a laser balloon that was identical in size (3 x 20 mm) to a balloon used for conventional balloon angioplasty performed on the same lesion immediately before laser balloon angioplasty. One or more neodymium:yttrium aluminum garnet (Nd:YAG) (1,060 nm) laser doses of 250 to 450 J were each delivered over a 20 s duration per exposure. Immediately and 1 day after laser balloon angioplasty no significant adverse effects on the arterial lumen were noted in any patient. By computerized image analysis of cineangiograms initial conventional balloon angioplasty failed to achieve a minimal luminal diameter greater than 1.5 mm in 14 patients (25%), including 3 patients with acute closure. However, after subsequent laser balloon angioplasty, minimal luminal diameter exceeded this value in all patients including this subgroup. Overall, minimal luminal diameter increased from 1.74 +/- 0.46 mm after conventional balloon angioplasty to 2.32 +/- 0.31 mm after laser balloon angioplasty (p less than 0.001) with no change found on 1 day and 1 month follow-up angiograms. Thus, laser balloon angioplasty is a safe, effective procedure for improving luminal dimensions after conventional balloon angioplasty.
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Affiliation(s)
- J R Spears
- Department of Medicine, Harper Hospital/Wayne State University, Detroit, Michigan
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