- Open Access
The effect of malaria and anti-malarial drugs on skeletal and cardiac muscles
© The Author(s) 2016
Received: 30 March 2016
Accepted: 28 October 2016
Published: 2 November 2016
Malaria remains one of the most important infectious diseases in the world, being a significant public health problem associated with poverty and it is one of the main obstacles to the economy of an endemic country. Among the several complications, the effects of malaria seem to target the skeletal muscle system, leading to symptoms, such as muscle aches, muscle contractures, muscle fatigue, muscle pain, and muscle weakness. Malaria cause also parasitic coronary artery occlusion. This article reviews the current knowledge regarding the effect of malaria disease and the anti-malarial drugs on skeletal and cardiac muscles. Research articles and case report publications that addressed aspects that are important for understanding the involvement of malaria parasites and anti-malarial therapies affecting skeletal and cardiac muscles were analysed and their findings summarized. Sequestration of red blood cells, increased levels of serum creatine kinase and reduced muscle content of essential contractile proteins are some of the potential biomarkers of the damage levels of skeletal and cardiac muscles. These biomarkers might be useful for prevention of complications and determining the effectiveness of interventions designed to protect cardiac and skeletal muscles from malaria-induced damage.
Malaria remains as the most important human infectious diseases in the World, with around 214 million cases a year, and an astounding 438,000 deaths resulting from this disease alone . About 3.2 billion people live in areas at risk of malaria. Populations of the poorest countries are the most vulnerable. More than 800 children die of malaria each day in Africa, according to a report of the World Health Organization  (one child every 2 min). In addition, non-endemic countries have reported hundreds of imported malaria cases . In 2013, 1727 cases of malaria were reported in the USA, and the US Armed Forces Command has named malaria as the number 1 enemy, because of the high exposure levels of soldiers in the highly endemic areas where they are frequently deployed on a range of missions .
The human malaria is caused by five different species and Plasmodium falciparum can result in severe malaria and death if adequate treatment is not provided quickly. The pathogenesis mechanisms of several diseases caused by protozoan and nematode parasites have shown to cause detrimental effect on cardiac and skeletal muscles (i.e., Chagas disease, toxoplasmosis, trichinosis, leishmaniosis, and malaria) [4–7]. Parasitic infestations by Trypanossoma cruzi, Toxoplasma gondii and Trichinella spiralis cause cardiomyopathy in the immunocompetent and immunocompromised patients. Besides those parasites, Plasmodium falciparum infection can also cause parasitic coronary artery occlusion .
Malaria pathogenesis is a process by which malaria parasites cause illness, abnormal function, or damage in their animal or human hosts. “Uncomplicated” malaria entails a series of recurring episodes of chills, intense fever, and sweating and often includes other symptoms such as headache, malaise, fatigue, body aches, nausea, and vomiting. In some cases, and especially in groups, such as children and pregnant women, the disease can progress to “severe malaria,” including complications, such as cerebral malaria/coma, seizures, severe anaemia, respiratory distress, kidney and liver failure, cardiovascular collapse, and shock [9–16]. Skeletal muscle is the largest organ-system of the human body and, as expected, malaria significantly affects skeletal muscle function and metabolism. In fact, among the above-mentioned malaria symptoms, many of them can be attributed to dysfunction of the skeletal system. This article reviews the current knowledge about the involvement of malaria disease and the anti-malarial drugs used in its treatment effecting skeletal and cardiac muscles.
Malaria affecting skeletal muscles
The detrimental effects of the causing malaria agents on skeletal muscles in animals and humans are well known [11, 16–20]. The main pathogenic mechanism in severe malaria is microvascular sequestration of parasitized red blood cells, decreasing oxygen delivery, leading to obstructed blood flow and tissue hypoxia . The skeletal muscle microvascular function and its oxygen consumption is significantly impaired in malaria in the proportion of the disease severity and oxygen consumption in severe malaria reduces similarly as in sepsis patients .
Several case reports have been published regarding malaria effects on skeletal muscles [11, 17]. Skeletal muscle necrosis was reported in a patient with severe falciparum malaria, probably due to sequester of infected erythrocytes, causing microcirculatory obstruction . Rhabdomyolysis, a serious syndrome directly or indirectly caused by muscle injury or death, can lead to complications, such as kidney failure due to intense myoglobinuria, have been commonly reported in malaria patients .
The injured skeletal muscles has biomarkers relating with severity of falciparum malaria infection [16, 21, 22], and the sequestration of infected red blood cells has been pointed out as the cause for these processes. Pronounced deviation in normal serum levels of creatine kinase (CK) have been also reported in malaria patients, affecting skeletal muscles [16, 21]. CK is an enzyme involved in the synthesis and use of energy-providing molecules, and it is predominantly found in cells of cardiac and skeletal muscles. A longitudinal study suggested that falciparum malaria is associated with skeletal muscle damage that increases during the course of the disease and directly associates with abnormalities in CK levels . In addition, the inflammatory characteristic of Plasmodium parasites increases cytokines levels (such as tumour necrosis factor, TNF) in combination with the formation of highly damaging free radicals , which could be considered as a potential important mechanism of damage and muscle weakness.
Effects of malaria on cardiac muscle
Few studies have been focused on cardiac effect in severe malaria [25–27] despite serious symptoms of coronary complications have been observed in severe malaria patients. Although, few electrocardiographic reports of malaria patients have been published [28–33], their results have shown even some cases of deaths related to cardiac arrhythmias in severe malaria .
Circulation levels of cardiac proteins, such as troponin T (TnT), myoglobin and creatine kinase (CK), which are biomarkers of myocardial injury, increases with the severity of malaria, indicating myocardial impairment in complicated falciparum malaria [24, 25]. In a case–control study, myoglobin, CK, plasma levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) and heart-type fatty acid-binding protein (H-FABP) were compared in 400 African children with severe and mild falciparum malaria, showing that children suffering from severe malaria and children who died due to malarial infection, exhibited high to very high levels of cardiac biomarkers, respectively . In another case–control study with 63 malaria patients showed that elevated levels of NT-proBNP and H-FABP indicated myocardial impairment in complicated but not in uncomplicated falciparum malaria .
Cardiac troponin T is the most sensitive biomarker for detection of minimal myocardial damage . Release of these troponins can occur when myocytes are damaged by a variety of conditions such as inflammation, trauma, exposure to toxins and necrosis because of occlusion of a coronary vessel [35, 36]. Although severe, myocardial cell damages detected by high troponin T levels are rare events, as shown by a retrospective case study of 161 stored sera of malaria falciparum patients .
By analyzing gene expression of cardiomyocytes treated with purified P. falciparum glycosyl phosphatidylinositol (GPI), which act as a toxin in the malaria pathogenesis, up-regulated genes related to apoptosis and myocardial damages were found, indicating that P. falciparum GPI can also induce cardiomyocyte apoptosis . In the same study, a falciparum infected patient presented with heart failure with typical signs of cardiac myocyte apoptosis, suggesting that his complications could have been caused by the presence of this toxin.
Some case reports have also suggested an association of Plasmodium vivax infection and the appearance of cardiac complications, with diagnosis of acute coronary syndrome, tachycardia, arrhythmia and myocardial failure. However, there is the possibility of anti-malarial therapy being the cause of these cardiac complications [38–40].
In a study using rodent malaria models, irreversible lesions were observed in several organs, including heart, of mice infected with Plasmodium chabaudi, Plasmodium vinckei petteri and Plasmodium yoelii nigeriensis, following acute and chronic malaria .
Anti-malarial drugs and their effects on cardiac and skeletal muscles
Treatment for malaria disease can only be initiated after making the correct diagnosis. Once made, appropriate anti-malarial treatment must be initiated immediately. Treatments are guided by three main factors: (i) the infecting species of Plasmodium, (ii) the clinical condition of the patient, and (iii) the susceptibility of the parasites to the anti-malarial drugs determined by the geographic area where the infection was acquired and the previous use of the medicines.
Most anti-malarial drugs used are active against the blood parasite stages (the forms that causes the symptoms) and include mainly: chloroquine, mefloquine, quinine, quinidine, doxycycline, clindamycin and artemisinins. Widely-used anti-malarial drugs have a limited clinical lifespan due to increasing parasite resistance development. For instance, chloroquine, the drug of choice most used in Africa to combat malaria is no longer effective against the disease in several of the malaria endemic areas. Artemisinin-based combination therapy is currently the recommended treatment against falciparum malaria, in many parts of the world. However, there is serious concern that malaria parasites are developing resistance to this treatment. With parasite resistance continuously rising, anti-malarial drug discovery requires strategies to decrease the time of delivering a new anti-malarial drug while simultaneously increasing the efficacy of existing treatments, developing alternative treatments , as well putting in place preventative measures, such as bed nets. In addition to causing serious whole body side effects, these drugs also have the ability to directly affect skeletal and cardiac muscles [43, 44].
Chloroquine is used in treatment and prophylaxis of malaria in areas where malaria is known to be sensitive to its effects. Prolonged administration of it can cause heart block and progressive myopathy . It has also been reported as cause of toxicity, mostly in the retina [45, 46]. Chloroquine is commonly used in the treatment of autoimmune disorders such as rheumatoid arthritis and systemic lupus erythematosus. Chloroquine increases the pH in lysosomal lumens, causing the disruption of lysosomal degradation of proteins . Ikezoe et al. , demonstrated that chloroquine triggers the disruption of lysosomal enzymes, inducing amyloid-β accumulation and endoplasmic reticulum (ER) stress. Amyloid-β causes skeletal muscle fiber degeneration, activating autophagy in skeletal muscles of rats.
Cases of neuromyopathies and cardiomyopathies due to chronic chloroquine intoxication have been reported , in long-term therapies of autoimmune disorders (mainly in systemic lupus erythematosus) and during the use of chloroquine in malaria prophylaxis. Due to its lower toxicity comparing with chloroquine, hydroxychloroquine is preferentially used today.
Quinine, a drug of choice in areas of chloroquine resistance, can cause serious toxic effects, such as arrhythmia, angina and hypotension, circulatory defect and shock [15, 49]. Case reports of severe malaria patients presenting arrhythmia during a treatment with quinine have been published . A fatal ventricular fibrillation was reported in a malaria patient, with no heart disease history, probably due to the toxicity of the administrated quinine during the treatment . Although rare, the reports show that more attention has to be given during malaria treatment due to toxicity of quinine.
Another malaria drug, artesunate, has been used as alternative to treat malaria with minimal toxicity. However, it has been shown to affect airway smooth muscles, inhibiting the proliferation of human cultured airway smooth muscle cells, causing hyperplasia and hypertrophy , which leads to obstruction of the airways .
Long-term impacts of malaria include death, disability, and significant socioeconomic burden on societies where the disease is prevalent. A better understanding of the biological processes underlying the progression of infection to disease is urgently needed to reduce the morbidity and mortality of malaria.
As many diseases caused by protozoan parasites, malaria has shown to cause detrimental effect on cardiac and skeletal muscles [5–7, 11]. Malaria in humans leads to muscle weakness, muscle fatigue, respiratory distress, kidney and liver failure, and can lead to cardiac myopathies. These severe complications can also be linked to skeletal muscle damage, besides the more readily recognized effects on erythrocytes.
Some of the findings reviewed in this article can help explain many of the symptoms in humans infected with malaria. Malaria infection induces a combination of inflammation and oxidative damage in skeletal and cardiac muscles leading to the enhanced degradation of key contractile proteins, which in turn is responsible for the compromised muscle function. Therefore, physiological key questions need to be answered: (i) What is the mechanism of direct damage to the contractile machinery? (ii) What are the genetic signaling pathways/networks regulating these modifications? (iii) Can these detrimental effects be counteracted with specific exercise training modalities, antioxidants therapy, dietary interventions or new drugs rationally designed to prevent the muscle damage?
These questions and many more and the large toll exerted by malaria clearly shows the need for investigation to determine the cellular and molecular mechanisms of malaria induced muscle damage.
MTM conceived and wrote the first draft of the article. MAB helped with its design and content and with coordination of the draft manuscript. MTM and MAB contributed to the structure and content and were involved in re-drafting the article. Both authors read and approved the final manuscript.
We are thankful to Ms. Heather Maxwell for proof reading the manuscript.
Both authors declare that they have no competing interests.
This work was supported by Sabbatical grant from the University of São Paulo (MTM), and the George W. and Hazel M. Jay Endowment (MB).
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
- WHO. World Malaria Report 2015. Geneva: World Health Organization.Google Scholar
- Sharma H, Sarker SJ, Lambourne JR, Fhogartaigh CN, Price NM, Klein JL. The selective outpatient treatment of adults with imported falciparum malaria: a prospective cohort study. QJM. 2016;109:181–6.View ArticlePubMedGoogle Scholar
- Cullen KA, Mace KE, Arguin PM. Malaria surveillance—United States, 2013. MMWR Surveill Summ. 2016;65:1–22.View ArticlePubMedGoogle Scholar
- Gomes AF, Guimarães EV, Carvalho L, Correa JR, Mendonça-Lima L, Barbosa HS. Toxoplasma gondii down modulates cadherin expression in skeletal muscle cells inhibiting myogenesis. BMC Microbiol. 2011;11:110.View ArticlePubMedPubMed CentralGoogle Scholar
- Esper L, Talvani A, Pimentel P, Teixeira MM, Machado FS. Molecular mechanisms of myocarditis caused by Trypanosoma cruzi. Curr Opin Infect Dis. 2015;28:246–52.View ArticlePubMedGoogle Scholar
- Silva-Almeida M, Carvalho LO, Abreu-Silva AL, d’Escoffier LN, Calabrese KS. Leishsmania (Leishmania) amazonensis infection: muscular involvement in BALB/c and C3H.HeN mice. Exp Parasitol. 2010;124:315–8.View ArticlePubMedGoogle Scholar
- Nguah SB, Feldt T, Hoffmann S, Pelletier D, Ansong D, Sylverken J, et al. Cardiac function in Ghanaian children with severe malaria. Intensive Care Med. 2012;38:2032–41.View ArticlePubMedGoogle Scholar
- Bott-Silverman C, Aksut B. Dilated and restrictive cardiomyopathies. Cleveland clinic. 2015. http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/cardiology/dilated-restrictive-cardiomyopathy/. Accessed 23 Sept 2016.
- Stanley IO, Iguodala AF, Henry OB, Iyekowa O. Myocardial dysfunction: a primary cause of death due to severe malaria in a Plasmodium falciparum-infected humanized mouse model. Iran J Parasitol. 2013;8:499–509.Google Scholar
- De Silva HJ, Goonetilleke AK, Senaratna N, Ramesh N, Jayawickrama US, Jayasinghe KS, Amarasekera LR. Skeletal muscle necrosis in severe falciparum malaria. BMJ. 1988;296:1039.View ArticlePubMedPubMed CentralGoogle Scholar
- Mishra SK, Newton CR. Diagnosis and management of the neurological complications of falciparum malaria. Nat Rev Neurol. 2009;5:189–98.View ArticlePubMedPubMed CentralGoogle Scholar
- Mishra SK, Dietz K, Mohanty S, Pati SS. Influence of acute renal failure in patients with cerebral malaria: a hospital-based study from India. Trop Doct. 2007;37:103–4.View ArticlePubMedGoogle Scholar
- Mishra SK, Mohanty S, Satpathy SK, Mohapatra DN. Cerebral malaria in adults: a description of 526 cases admitted to Ispat General Hospital in Rourkela. India. Ann Trop Med Parasitol. 2007;101:187–93.View ArticlePubMedGoogle Scholar
- Mishra SK, Behera PK, Satpathi S. Cardiac involvement in malaria: an overlooked important complication. J Vector Borne Dis. 2013;50:232–5.PubMedGoogle Scholar
- Clark IA, Awburn MM, Whitten RO, Harper CG, Liomba NG, Molyneux ME, et al. Tissue distribution of migration inhibitory factor and inducible nitric oxide synthase in falciparum malaria and sepsis in African children. Malar J. 2003;2:6.View ArticlePubMedPubMed CentralGoogle Scholar
- Miller KD, White NJ, Lott JA, Roberts JM, Greenwood BM. Biochemical evidence of muscle injury in African children with severe malaria. J Infect Dis. 1989;159:139–42.View ArticlePubMedGoogle Scholar
- Taylor WR, Prosser DI. Acute renal failure, acute rhabdomyolysis and falciparum malaria. Trans R Soc Trop Med Hyg. 1992;86:361.View ArticlePubMedGoogle Scholar
- Knochel JP, Moore GE. Rhabdomyolysis in malaria. N Engl J Med. 1993;329:1206–7.View ArticlePubMedGoogle Scholar
- Brotto MA, Marrelli MT, Brotto LS, Jacobs-Lorena M, Nosek TM. Functional and biochemical modifications in skeletal muscles from malarial mice. Exp Physiol. 2005;90:417–25.View ArticlePubMedGoogle Scholar
- Yeo TW, Lampah DA, Kenangalem E, Tjitra E, Price RN, Anstey NM. Impaired skeletal muscle microvascular function and increased skeletal muscle oxygen consumption in severe falciparum malaria. J Infect Dis. 2013;207:528–36.View ArticlePubMedGoogle Scholar
- Davis TM, Supanaranond W, Pukrittayakamee S, Holloway P, Chubb P, White NJ. Progression of skeletal muscle damage during treatment of severe falciparum malaria. Acta Trop. 2000;76:271–6.View ArticlePubMedGoogle Scholar
- García F, Cebrián M, Dgedge M, Casademont J, Bedini JL, Neves O, et al. Endothelial cell activation in muscle biopsy samples is related to clinical severity in human cerebral malaria. J Infect Dis. 1999;179:475–83.View ArticlePubMedGoogle Scholar
- Davis TM, Pongponratan E, Supanaranond W, Pukrittayakamee S, Helliwell T, Holloway P, et al. Skeletal muscle involvement in falciparum malaria: biochemical and ultrastructural study. Clin Infect Dis. 1999;29:831–5.View ArticlePubMedGoogle Scholar
- Ehrhardt S, Wichmann D, Hemmer CJ, Burchard GD, Brattig NW. Circulating concentrations of cardiac proteins in complicated and uncomplicated Plasmodium falciparum malaria. Trop Med Int Health. 2004;9:1099–103.View ArticlePubMedGoogle Scholar
- Ehrhardt S, Mockenhaupt FP, Anemana SD, Otchwemah RN, Wichmann D, Cramer JP, et al. High levels of circulating cardiac proteins indicate cardiac impairment in African children with severe Plasmodium falciparum malaria. Microbe Infect. 2005;7:1204–10.View ArticleGoogle Scholar
- Fern EB, McNurlan MA, Garlick PJ. Effect of malaria on rate of protein synthesis in individual tissues of rats. Am J Physiol. 1985;249(5 Pt 1):E485–93.PubMedGoogle Scholar
- Herr J, Mehrfar P, Schmiedel S, Wichmann D, Brattig NW, Burchard GD, et al. Reduced cardiac output in imported Plasmodium falciparum malaria. Malar J. 2011;10:160.View ArticlePubMedPubMed CentralGoogle Scholar
- Janka JJ, Koita OA, Traoré B, Traoré JM, Mzayek F, Sachdev V, et al. Increased pulmonary pressures and myocardial wall stress in children with severe malaria. J Infect Dis. 2010;202:791–800.View ArticlePubMedPubMed CentralGoogle Scholar
- Costenaro P, Benedetti P, Facchin C, Mengoli C, Pellizzer G. Fatal myocarditis in course of Plasmodium falciparum infection: case report and review of cardiac complications in malaria. Case Rep Med. 2011. doi:10.1155/2011/202083.PubMedPubMed CentralGoogle Scholar
- Bertrand E, Clerc G, Renambot J, Assamoi JO, Chauvet J. 50 cas de paludisme aigu: e´tude symptomatologique et notamment cardiaque. Bull Soc Pathol Exot. 1975;68:456–66.Google Scholar
- Stout TT, van Bergeijk L, Bouma HG, Woittiez AJ. Electrocardiographic changes in acute malaria. Neth J Med. 1990;37:124–8.PubMedGoogle Scholar
- Franzen D, Curtius JM, Heitz W, Höpp HW, Diehl V, Hilger HH. Cardiac involvement during and after malaria. Clin Investig. 1992;70:670–3.View ArticlePubMedGoogle Scholar
- Bethell DB, Phuong PT, Phuong CX, Nosten F, Waller D, Davis TM, et al. Electrocardiographic monitoring in severe falciparum malaria. Trans R Soc Trop Med Hyg. 1996;90:266–9.View ArticlePubMedGoogle Scholar
- Günther A, Grobusch MP, Slevogt H, Abel W, Burchard GD. Myocardial damage in falciparum malaria detectable by cardiac troponin T is rare. Trop Med Int Health. 2003;8:30–2.View ArticlePubMedGoogle Scholar
- Lang K, Borner A, Figulla H. Comparision of biochemical markers for the detection of minimal myocardial injury: superior sensitivity of cardiac troponin-T ELISA. J Int Med. 2000;247:119–23.View ArticleGoogle Scholar
- Aviles RJ, Askari AT, Lindahl B, Wallentin L, Jia G, Ohman EM, et al. Troponin T levels in patients with acute coronary syndromes, with or without renal dysfunction. N Engl J Med. 2002;27(346):2047–52.View ArticleGoogle Scholar
- Wennicke K, Debierre-Grockiego F, Wichmann D, Brattig NW, Pankuweit S, Maisch B, et al. Glycosylphosphatidylinositol-induced cardiac myocyte death might contribute to the fatal outcome of Plasmodium falciparum malaria. Apoptosis. 2008;13:857–66.View ArticlePubMedGoogle Scholar
- Bhat S, Alva J, Muralidhara K, Fahad S. Malaria and the heart. BMJ Case Rep. 2012;2012:bcr2012007275. doi:10.1136/bcr-2012-007275.
- Bhat S, Kumar M, Alva J. Malaria and the conducting system of the heart. BMJ Case Rep. 2013;2013:bcr2012007462. doi:10.1136/bcr-2012-007462.
- Dev N, Gadpayle AK, Sankar J, Choudhary M. An unusual case of heart failure due to Plasmodium vivax infection with a favorable outcome. Rev Soc Bras Med Trop. 2014;47:663–5.View ArticlePubMedGoogle Scholar
- Vuong PN, Richard F, Snounou G, Coquelin F, Rénia L, Gonnet F, Chabaud AG, Landau I. Development of irreversible lesions in the brain, heart and kidney following acute and chronic murine malaria infection. Parasitol. 1999;119:543–53.View ArticleGoogle Scholar
- Verlinden BK, Louw A, Birkholtz LM. Resisting resistance: is there a solution for malaria? Expert Opin Drug Discov. 2016;29:1–12.Google Scholar
- Veinot JP, Mai KT, Zarychanski R. Chloroquine related cardiac toxicity. J Rheumatol. 1998;25:1221–5.PubMedGoogle Scholar
- Ikezoe K, Furuya H, Arahata H, Nakagawa M, Tateishi T, Fujii N, et al. Amyloid-beta accumulation caused by chloroquine injections precedes ER stress and auto phagosome formation in rat skeletal muscle. Acta Neuropathol. 2009;117:575–82.View ArticlePubMedGoogle Scholar
- Regillo CD. Basic and clinical science course, section 12: retina and vitreous 2011.Google Scholar
- Nogueira HM, Gama RD. Bull’s-eye maculopathy. N Engl J Med. 2009;360:2224.View ArticlePubMedGoogle Scholar
- Tönnesmann E, Kandolf R, Lewalter T. Chloroquine cardiomyopathy a review of the literature. Immunopharmacol Immunotoxicol. 2013;35:43442.View ArticleGoogle Scholar
- Lhermitte F, Marteau R, Chedru F, Mallecourt J, Estrade G, Godet-Guillain J, Chevallay M. Chloroquine neuromyopathy. One case in prophylactic malariatherapy. Nouv Presse Med. 1977;6:3205–7 (in French).PubMedGoogle Scholar
- Silamut K, Hough R, Eggelte T, Pukrittayakamee S, Angus B, White NJ. A simple method for assessing quinine pre-treatment in acute malaria. Trans R Soc Trop Med Hyg. 1995;89:665–7.View ArticlePubMedGoogle Scholar
- Gunawan CA, Harijanto PN, Nugroho A. Quinine-induced arrhythmia in a patient with severe malaria. Acta Med Indonesia. 2007;39:27–32.Google Scholar
- Bonington A, Davidson RN, Winstanley PA, Pasvol G. Fatal quinine cardiotoxicity in the treatment of falciparum malaria. Trans R Soc Trop Med Hyg. 1996;90:305–7.View ArticlePubMedGoogle Scholar
- Tan SS, Ong B, Cheng C, Ho WE, Tam JK, Stewart AG, Harris T, Wong WS, Tran T. The antimalarial drug artesunate inhibits primary human cultured airway smooth muscle cell proliferation. Am J Respir Cell Mol Biol. 2014;50:451–8.PubMedGoogle Scholar
- Lambert RK, Wiggs BR, Kuwano K, Hogg JC, Paré PD. Functional significance of increased airway smooth muscle in asthma and COPD. J Appl Physiol. 1993;74:2771–81.View ArticlePubMedGoogle Scholar
- Abreu EL, Cheng A, Kelly PJ, Chertoff K, Brotto L, Griffith E, et al. Skeletal muscle troponin as a novel biomarker to enhance assessment of the impact of strength training on fall prevention in the older adults. Nurs Res. 2014;63:75–82.View ArticlePubMedGoogle Scholar