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Mini Review - (2015) Volume 0, Issue 0

Marine Carbohydrate Based Therapeutics for Alzheimer Disease-Mini Review

Manigandan V1, Karthik R1, Saravanan R2*\r\n
  1. Department of Medical Biotechnology, Faculty of Allied Health Sciences, Chettinad Academy of Research and Education( CARE), Kelambakkam, Chennai-603103, Tamil Nadu, India.
  2. Department of Marine Pharmacology, Faculty of Allied Health Sciences, Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603103, Tamil Nadu, India
Corresponding Author: Dr. Ramachandran Saravanan,Assistant Professor-Marine Pharmacology, Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai-603 103, Tamil Nadu, India, Tel: 00905060597701 E-mail: [email protected]
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Abstract

Neurological disorders occur due to recognition of neurological repairs and resources are indirectly scarce, especially in low income and developing countries. They are disorders of the central nervous system and common cause of physiological and economic burden worldwide. Alzheimer’s disease (AD) and other dementias is one of the progressive neurodegenerative disorders which causes memory loss and cognitive impairment due to aggregation of misfolded proteins and neurofibrillar tangles in brain. The failure of the conventional drugs to decline disease progression accompanied with numerous adverse effects has forced the researchers to look for efficient drug candidates from alternate natural resources. The marine reservoir with its large biodiversity and untapped resource potential holds numerous molecules of biomedical and clinical importance. In this review, we hypothesize the utilization of the sulfated polysaccharides as glycobased mimetics, leading to the prevention of aggregation of plaques and protein tangles. With further screening and validation, the carbohydrates from the marine sources, thus hold immense potentials to function as alternative therapeutic agent against neurological disorders.

Keywords

Neurological disorders; Alzheimer; Marine carbohydrates; Heparan sulfate; Sulfated chitosan

Introduction

Neurodegenerative disorders (ND) are a heterogeneous group of disorders, increasingly prevalent among the elderly people and presents a very key challenge to researchers and health care industries. ND includes AD, Parkinson’s (PD), Huntington’s (HD), Amyotrophic lateral sclerosis (ALS) and prion diseases are the major ND which shares common pathological phenotype, causing neurological dysfunction and loss of neuronal cells in brain [1,2]. They are characterized by the aggregation of misfolded proteins, which trigger a cascade of molecular events leading to accumulation of certain peptides and proteins such as amyloid β (Aβ), huntingtin, α-synuclein etc and concomitant failure of normal biological function. The aggregation of misfolded proteins causes the formation of lewy bodies, tangles and plaques in the brain [3,4].

AD

AD is one of the progressive, irreversible ND of the central nervous system, most common among the aged population leading to memory loss and progressive cognitive decline.
It is characterized by the formation of senile plaques and neurofibrillary tangles, decrease in cholinergic transmission, and psycho-behavior disturbances [5,6]. Although, the cause of disease is still unclear, multiple factors are thought to play a deleterious role in the pathogenesis including abnormal proteins, oxidative stress, excessive metal ion accumulation in brain, depletion of endogenous antioxidants, glutametric neurotoxicity, reduced expression of tropic factors and inflammation causing decrease of neurons and dysfunction of ubiquitin-proteasome systems [7,8].

Prevalence and current therapy

World health organization (WHO) statistics reports that the prevalence of AD is high with more than 30 million people affected with AD worldwide, and is predicted to increase by 70% to more than thrice in 2050 [9]. The Food and Drug Administration (FDA) has approved two types of medications towards mild and moderate stages of AD (viz. Tacrine, Donepezil, Rivastigmine, Memantine). Majorly, these drugs function as acetylcholinesterase (AChE) inhibitors or target the N-methyl D-aspartate (NMDA) receptors [10]. No effective treatment that modifies or stops the progression of AD is currently available [11]. Most of the currently available drugs from the market are either synthetic or terrestrial based natural products [12]. More than 200 AD drug candidates have failed in later stage of clinical phase studies due to associated adverse effects such as loss of appetite, diarrhea, muscle cramps, nausea, restlessness etc. [7,12]. Hence, the wide range of pathological features in AD and the inability to meliorate the disease condition warrants a growing set of promising therapeutic targets towards AD therapy and management [13,14]. The current review focuses on the importance of carbohydrates from marine derived compounds against ND.

The marine diversity

The ocean covering nearly 70% of the earth area provides a fascinating range of biodiversity of ~2,210,000 species out of which only 190000 are identified so far [15,16]. Marine environment exhibits extremely harsh physical and chemical environmental conditions that drive the researchers’ towards the production of different molecules with unique structural features when compared to the terrestrial ecosystem. Invariably, the land holds up a total of only 12 phyla, whereas the marine stream comprises a total of 32 phyla [17,18]. A recent census shows that the field of marine research transcends across 80 nations, involving more than 2700 scientists, concentrating on diversity, distribution and discovering potential drugs from various marine sources [19]. Moreover, the marine system produces an inexhaustible and rich source of potential natural products with a wide array of nutraceutical, cosmeceutical and unique pharmaceutical activities. More than 30000 compounds have been identified from the marine environment with unique structures and associated pharmaceutical activity [18]. Figure 1 shows the decade-wise increase in the exploration of new bioactive compounds from marine sources from 1971 to 2010. Extensive bioprospecting of the marine fauna, flora and microbes have a huge impact on the biomedical industry, producing small molecules with anti-infective, anti-cancer, anti-inflammatory, analgestic, immuno-modulatory, anti-viral, neuroprotective, antifouling and a range of other biological activities. It proves that the marine reservoir holds infinite pharmacologically promising and exciting drug candidates for human health [20-22].

Marine glycobiology

Marine carbohydrates are the most complex biomolecules in terms of structure. Diversity of monomers, glycosidic linkage, enantiomerism, high dynamic behaviour, anomericity contribute to structural complexity in carbohydrate moieties. Due to the complexity in the carbohydrate structure, they exhibit higher number of classes like N-linked or O-linked oligosaccharides in glycosaminoglycans (GAGs), proteoglycans, sulfated galactans, sulfated fucans etc. [23]. Marine glycobiology offers vast unexploited potential in the discovery of new therapeutics derived from carbohydrates or other molecules which target the biosynthesis and function of saccharides. Glycomics studies are extensively studied in cellular glycoprofiling of cancer and other diseases, glycosylation of therapeutic proteins, correlation between activity and sulfation pattern in GAGs and glycosylation pattern in cell recognition [24]. The structural complexity and multifold diversity of the carbohydrates, in comparison to the protein and nucleic acids is given in Figure 2.
Advanced research has boosted the exploration of novel carbohydrate-based drugs by various research groups and multinational pharmaceutical companies for their clinical applications. Glycans from marine origin with peculiar sulfate positions and well defined unique structures have improved their therapeutic properties when compared to terrestrial sources. They possess distinct mechanism which helps to achieve accurate structure-activity relationships. These properties are extremely important for drug discovery development as it constitutes a limited proportion of a larger world of marine therapeutics [23,25-28].
GAGs are long un-branched hetero-polysaccharides, widespread in nature, occurring in a great variety of organisms exhibiting various physiological and biological functions [29-31]. They are majorly classified as sulfated [Keratan sulphate-KS, dermatan sulphate-DS, chondroitin sulphate-CS, heparin-HP and heparan sulphate-HS] and non-sulfated GAGs-[Hyaluronic acid]. Among the GAGs, HP and HS are well explored for their biomedical potential. Commercial heparin obtained for clinical use is isolated from porcine/bovine lung and intestinal tissues. An estimated total of 30 to 40 tons of HP is obtained from 400 to 700 million pigs worldwide [32,33]. Previous reports are available for the management of AD using synthetically and enzymatically obtained HP/HS. Scholefield and coworkers in 2003 [34] have reported the ameliorating effect of HS by inhibiting the amyloid ß secretase (BACE-1). Similarly, HP derived from porcine also has been reported for inhibiting BACE-1 [35]. Leveugle and coworkers in 1994 [36] had demonstrated the interaction of sulfated polymers with Aß, displacing the HS proteoglycan bound to Aß, thereby preventing or slowing amyloid formation and concomitant aggregation.

Limitation of mammalian GAGs

Uncertainty in distinguishing the source of the HP (bovine or porcine) and difficulties in the maintenance of purity has limited the use of bovine HP (Figure 3). The outbreak of mad cow disease, absence of alternate (chemical, enzymatic & recombinant) HP synthesis practices and ethical constraints warrant the isolation of HP from non-mammalian sources [33,37]. Due to its structural complexity, purification and further characterization of the GAGs is highly challenging [38].

Marine carbohydrate based drugs for ND

Marine GAGs are capable of binding with a range of proteins with high specificity and actively participate in cell signaling, cell development, cell adhesion, cell differentiation and cell matrix interactions. These biomolecules present a higher potential for medical and pharmaceutical applications against various disorders [39]. Reduced rates of viral infections in marine GAGs favor the utilization of HP and HS from marine sources [33]. Though few reports are available from marine seaweeds (polysaccharides) against ND, therapeutic potential of GAGs from marine animals remain highly limited. The utilization of marine carbohydrate based mimetic compounds, acting as receptor molecules, binding to the misfolded protein aggregates and preventing neuronal damage, is gaining higher importance [40]. The non sulfated GAG, hyaluronan has been associated with an increased occurrence of 26% at the temporal lobe of AD patients, due to binding of the astrocytes to the hyaluronan via their CD44 receptors [41]. HS 971, an oligomannuronate from alginate and heparinoid 971, a derivative of HP obtained from seaweeds screened for their therapeutic ability against AD is currently in phase 11b clinical trials [42].
A series of plant derived polysaccharides, α-glucan-(PC-2, PB-2 and isolichenan) from Parmelia caperata, Flavoparmelia baltimorensis and β-1, 3/1,6 glucan (lentinan) from Lentinula edodes have been reported to exert LTP (Long term potentiation) which is a measure of cellular basis for learning and memory [43-45]. α and ß-glucans enhance hippocampal synaptic plasticity [46]. The sulfated polysaccharide from the brown algae Laminaria japonica, sulfated polymannuroguluronate has been reported to exhibit neuroprotective effect by decreasing apoptosis in PC12 neuronal cells, in vitro [47]. Fucoidan from marine algae such as Fucus vesiculosis, Macrocystis pyrifera and Laminaria japonica has been reported to suppress cellular infiltration of joints [48], neutrophil migration [49] and post-operative pain with no toxicity [50]. Α 1, 4 D glucan from the blue mussel Mytilus coruscus has been reported to exhibit antioxidant activity by preventing liver injury of mice by lowering the levels of serum ALT, AST and hepatic MDA [51]. Cheng and colleagues in 2010 [52] have reported the scavenging abilities of glucanic polysaccharides from Mytilus edulis. Overcoming the aforementioned difficulties, we have isolated the sulfated polysaccharides, HS from the marine scallop Amussium pleuronectus and sulfated chitosan [SC] from the cuttlefish Sepia pharaonis.
The marine scallop (A. pleuronectus) bivalves are collected from the Mudasalodai landing center, Parangipettai (lat. 11°29′; long. 79°46′ E), Tamil Nadu, India. The samples are defatted and processed to obtain crude glycosaminoglycan (GAG) [53]. The crude GAG is subjected to enzymatic depolymerization to obtain low molecular weight heparan sulfate (LMW-HS) and its purity was determined by PAGE and metachromatic activity. The elemental and sulfur content was estimated by CHNS analysis. The structure of the heparan sulfate was determined by 1H-NMR spectroscopy. The anticoagulant activities of the LMW-HS are determined [54].
Cuttlefishes (S. pharaonis) are collected from the Kasimedu landing center, Tamil Nadu, India (lat. 13°12′; long. 80°29′). The cuttlebones are removed, washed, shadow dried and crushed to a fine powder. The powder is de-proteinized, decolorized and decalcified to obtain chitin. The chitin is deacetylated to obtain chitosan which is sulfated to yield SC.
The molecular weight of the isolated HS and SC are recordeded using Matrix Assisted Laser Desorption-Ionisation-Time of Flight Mass Spectrometry [MALDI-TOF MS]. The molecular weight of HS and SC are determined to be 698 and 1277 Da yielding 21 and 10 ionized fragments respectively (Figures 4 and 5). We have reported the potentials of HS from the marine scallop, A. pleuronectus as an alternate source of anticoagulant [35]. The low molecular weight nature of the sulfated polysaccharides could be hypothesized to render permeability across the bloodbrain barrier. We also hypothesize that the isolated sulfated polysaccharides may competitively inhibit binding of Aß with intrinsic GAG, preventing amyloid formation and aggregation. The sulfated polysaccharides may be further screened for their abilities to function as glyco-mimetics that may prevent the aggregation and neurofibrillar formation, thereby opening novel avenues towards therapy and management of AD. Thus, the sulfated polysaccharides, HS and SC from the marine scallop and cuttlefish could be potential candidates from marine sources towards AD therapy and management in future.

Conclusion

The mini review discusses the alternative approaches for the therapy and management of ND, essentially affecting the extracellular matrix. The review highlights the promising potentials of carbohydrate based compounds from marine sources with enhanced neuro-biological activity by virtue of its structural features. The structural modifications due to branching and chemical substitutions like sulfation, de-acetylation, size, molecular weight improve binding efficiencies with target proteins associated in ND. These modifications also extend the half-life of the compound increasing its bio-availability. From our study, we expect the LMW-HS from marine scallop and SC from cuttlefish to cross the blood-brain barrier and modulate the action of neurological protein. In purview of the above, carbohydrates from marine sources thus hold immense potentials as an alternate source of anti-alzheimer agents of the future.

Figures at a glance

         
Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
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References

  1. Barnham KJ, Masters CL, Bush AI (2004) Neurodegenerative diseases and oxidative stress. Nat Rev Drug Discov 3: 205-214.
  2. Sheikh S, Safia, Haque E, Mir SS (2013) Neurodegenerative diseases: multifunctional conformational diseases and their therapeutic interventions. J Neurodegener Dis 8.
  3. Ciryam P, Tartaglia GG, Morimoto RI, Dobson CM,Vendruscolo M (2013) Widespread aggregation and neurodegenerative diseases are associated with supersaturated proteins. Cell Rep 5: 781-790.
  4. Kim J, Jung IM (2015) Special issue on neurodegenerative diseases and their therapeutic approaches. Exp Mol Med 47: e146.
  5. Otto R, Penzis R, Gaube F, Winckler T, Appenroth D, et al. (2014) Beta and gamma carboline derivatives as potential anti-alzheimer agents: a comparison. Eur J Med Chem 87: 63-70.
  6. Yang Z, Song Z, Xue W, Sheng J, Shu Z, et al. (2014) Synthesis and structure-activity relationship of nuciferine derivatives as potential acetylcholinesterase inhibitors. Med Chem Res 23: 3178-3186.
  7. Azam F, Amer AM, Abulifa AR, Elzwawi MM (2014) Ginger components as new leads for the design and development of novel multi-targeted anti-alzheimer's drugs: a computational investigation. Drug Des Devel Ther 8: 2045-2059.
  8. Bharate JB, Wani A , Sharma S, Imam SR, Kumar M, et al. (2014) Synthesis, and the antioxidant, neuroprotective and P-glycoprotein induction activity of 4-arylquinoline-2-carboxylates. Org Biomol Chem 12: 6267-6277.
  9. Roccisano D, Henneberg M, Saniotis A (2014) A possible cause of Alzheimer’s dementia Industrial soy foods. Med hypotheses 82: 250-254.
  10. Kanhed AM, Sinha A, Machhi J, Tripathi A, Parikh ZS, et al. (2015) Discovery of isoalloxazine derivatives as a new class of potential anti-Alzheimer agents and their synthesis Bioorganic Chem 61: 7-12.
  11. Nguyen TP, Priami C, Caberlotto L (2015) Novel drug target identification for the treatment of dementia using multi-relational association mining. Sci Rep 5: 11104.
  12. Panche A, Chandra S, Ad D, Harke S (2015) Alzheimer’s and current therapeutics: A review. Asian J Pharm Clin Res 8: 14-19.
  13. Silva T, Reis J, Teixeira J, Borges F (2014) Alzheimer's disease, enzyme targets and drug discovery struggles: from natural products to drug prototypes. Ageing Res Rev 15: 116-45.
  14. Rosini M, Simoni E, Bartolini M, Soriano E, Marco-Contelles J, et al. (2013) The bivalent ligand approach as a tool for improving the in vitro anti-alzheimer multitarget profile of dimebon. Chem Med Chem 8: 1276-1281.
  15. Duarte K, Teresa AP, Santos R, Freitas AC, Duarte AC (2012) Analytical techniques for discovery of bioactive compounds from marine fungi.Trends in Anal Chem 34: 97-110.
  16. Kiuru P, Valeria M DA , Muller CD, Tammela P, Vuorela H, et al. (2014) Exploring marine resources for bioactive compounds. Planta Med 80: 1234-1246.
  17. Sugumaran M, Robinson WE (2010) Bioactive dehydrotyrosyl and dehydrodopyl compounds of marine origin. Mar Drugs 8: 2906-2935.
  18. Nair DG, Weiskirchen R, Al-Musharafi SK (2015) The use of marine-derived bioactive compounds as potential hepatoprotective agents. Acta Pharmacol Sin 36: 158-170.
  19. Schumacher M, Kelkel M, Dicato M, Diederich M (2011) Gold from the sea: marine compounds as inhibitors of the hallmarks of cancer. Biotechnol Adv 29: 531-547.
  20. Alonso D, Castro A, Martinez A (2005) Marine compounds for the therapeutic treatment of neurological disorders Expert Opin Ther Patents 15: 1377-1386.
  21. Molinski TF, Morinaka BI (2012) Integrated Approaches to the Configurational Assignment of Marine Natural Products. Tetrahedron 68: 9307-9343.
  22. Duarte K, Justino CIL, Pereira R, Freitas AC, Gomes AM, et al. (2014) "Green analytical methodologies for the discovery of bioactive compounds from marine sources. Trends in Environ Anal Chem 3-4: 43-52.
  23. Pomin VH (2014) Marine medicinal glycomics. Front Cell Infect Microbiol 4: 1-13.
  24. Turnbull JE, Field RA (2007) Emerging glycomics technologies. Nat Chem Biol 3: 74.
  25. Pomin VH, Mourao PA (2008) Structure, biology, evolution, and medical importance of sulfated fucans and galactans. Glycobiology18: 1016-1027.
  26. Ernst B, Magnani JL (2009) From carbohydrate leads to glycomimetic drugs. Nat Rev Drug Discov 8: 661-677.
  27. Pomin VH (2009) Review: an overview about the structure-function relationship of marine sulfated homopolysaccharides with regular chemical structures. Biopolymers91: 601-609.
  28. Pomin VH (2012a) Fucanomics and galactanomics: marine distribution, medicinal impact, conceptions, and challenges. Mar Drugs10: 793-811.
  29. Toshihiko T, Amornrut A, Robert LJ (2003) Structure and bioactivity of Sulfated polysaccharides. Trends Glycosci Glyc 15: 29-46.
  30. Saravanan R, Vairamani S, Shanmugam A (2010) Glycosaminoglycans from marine clam Meretrix meretrix (Linne.) are an anticoagulant. Prep Biochem Biotechnol 40: 305-315.
  31. Saravanan R, Shanmugam A (2010) Isolation and characterization of low molecular weight glycosaminoglycans from marine mollusc Amussium pleuronectus (Linne) using chromatography. Appl Biochem Biotechnol., 160: 791-799.
  32. Peterson S, Frick A, Liu J (2009) Design of biologically active heparan sulfate and heparin using an enzyme-based approach. Nat Prod Rep 26: 610-627.
  33. Saravanan R (2014) Isolation of low-molecular-weight heparin/heparan sulfate from marine sources. Adv Food Nutr Res 72: 45-60.
  34. Scholefield Z, Yates EA, Wayne G, Amour A, McDowell W, et al. (2003) Heparan sulfate regulates amyloid precursor protein processing by BACE1, the Alzheimer’s -secretase. J Cell Biol 163: 97-108.
  35. Patey SJ, Edwards EA, Yates EA, Turnbull JE (2006) Heparin derivatives as inhibitors of BACE-1, the Alzheimer's beta-secretase, with reduced activity against factor Xa and other proteases. J Med Chem 5; 49: 6129-6132.
  36. Leveugle B, Scanameo A, Ding W, Fillit H (1994) Binding of heparan sulfate glycosaminoglycan to [beta]-amyloid peptide: inhibition by potentially therapeutic polysulfated compounds. Neuroreport 5.
  37. Saravanan R, Shanmugam A (2011) Is isolation and characterization of heparan sulfate from marine scallop Amussium pleuronectus (Linne) an alternative source of heparin?!! Carbohyd Poly 86: 1082-1084.
  38. Hashimoto K, Kawano S, Goto S, Kinoshita KFA, Kawashima M, et al. (2005) A global representation of the carbohydrate structures: a tool for the analysis of glycan. Genome Inform 16: 214-222.
  39. Senni K, Pereira J, Gueniche F, Ladrat CD, Sinquin C, et al. (2011) Marine polysaccharides: a source of bioactive molecules for cell therapy and tissue engineering. Mar Drugs 9: 1664-1681.
  40. Rowlands D, Sugahara K, Kwok JCF (2015) Glycosaminoglycans and glycomimetics in the Central nervous system. Molecules 20: 3527-3548.
  41. Akiyama H, Tooyama I, Kawamata T, Ikeda K, McGeer PL (1993) Morphological diversities of CD44 positive astrocytes in the cerebral cortex of normal subjects and patients with Alzheimer’s disease. Brain Res 632: 249-259.
  42. Smriga M, Saito H, Shibata S, Narui T, Okuyama T, et al. (1996) PC-2, linear homoglucan with alpha-linkages, peripherally enhances the hippocampal long-term potentiation. Pharm Res 13: 1322-1326.
  43. Hirano E, Saito H, Ito Y, Ishige K, Edagawa Y, et al. (2003) PB-2, a polysaccharide fraction from lichen Flavoparmelia baltimorensis, peripherally promotes the induction of long-term potentiation in the rat dentate gyrus in vivo. Brain Res 963: 307-311.
  44. Edagawa Y, Smriga M, Nishiyama N, Saito H (2001) Systemic administration of lentinan, a branched beta-glucan, enhances long term potentiation in the rat dentate gyrus in vivo. Neurosci Lett 314: 139-142.
  45. Nelson ED, Ramberg JE, Best T, Sinnott RA (2012) Neurologic effects of exogenous saccharides: A review of controlled human, animal, and in vitro studies Nutr Neurosci 15 4: 149-162.
  46. Hui B, Li J, Geng MY (2008) Sulfated polymannuroguluronate, a novel anti-acquired immune deficiency syndrome drug candidate, decreased vulnerability of PC12 cells to human immunodeficiency virus tat protein through attenuating calcium overload. J Neurosci Res 86: 1169-1177.
  47. Myers SP, O’Connor J, Fitton JH, Brooks L, Rolfe M, et al. (2010) A combined phase I and II open label study on the effects of seaweed extract nutrient complex on osteoarthritis. Biologics 4: 33-44.
  48. Cunha TM, Verri WA Jr, Schivo IR, Napimoga MH, Parada CA, et al. (2008) Crucial role of neutrophils in the development of mechanical inflammatory hypernociception. J Leukoc Biol 83: 824-832.
  49. McNamee KE, Burleigh A, Gompels LL, Feldmann M, Allen SJ, et al. (2010) Treatment of murine osteoarthritis with TrkAd5 reveals a pivotal role for nerve growth factor in non-inflammatory joint pain. Pain 149: 386-392.
  50. Xu H, Guo T, Guo YF, Zhang J, Li Y, et al. (2008) Characterisation and protection on acute liver injury of a polysaccharide MP-I from Mytilus coruscus. Glycobiology 18: 97-103.
  51. Cheng S, Yu X, Zhang Y (2010) Extraction of polysaccharides from Mytilus edulis and their antioxidant activity in vitro. Shipin Gongye Keji 31: 132-134.
  52. Saravanan R, Shanmugam A (2010) Isolation and characterization of low molecular weight glycosaminoglycans from marine mollusc Amussium pleuronectus (Linne) using chromatrography. Appl Biochem Biotechnol 160: 791-799.
  53. Saravanan R, Shanmugam A (2011) Is isolation and characterization of heparan sulfate from marine scallop Amussium pleuronectus (Linne) an alternative source of heparin?!! Carbohyd Poly 86: 1082-1084.