May 2014 A bio-pharmaceutical company developing treatments for hypertension, diabetes , diabetic nephropathy and metabolic syndrome. 1 Forward-Looking Statements This document contains forward-looking information pursuant to applicable securities law. All information that addresses activities or developments that we expect to occur in the future are forward-looking statements. Forward-looking statements are based on the estimates and opinions of management on the date the statements are made. However, they should not be regarded as a representation that any of the plans or objectives will be achieved. Actual results may differ materially from those expressed or implied by the forward-looking information set forth in this document due to risks and uncertainties affecting the Company, including access to capital, the successful completion of clinical trials and receipt of all regulatory approvals. The forward-looking statements in this document are based on a number of assumptions which may prove to be incorrect, including assumptions concerning general business and economic conditions, positive clinical trials and the availability of financing. XORTX assumes no responsibility to update forward-looking statements in this document. 2 XORTX Company Overview • XORTX is a bio-pharmaceutical company founded on patents and patent applications that include US and worldwide rights for the development of uric acid lowering agents to treat hypertension, diabetic nephropathy, insulin resistance, metabolic syndrome and diabetes. • XORTX’s technology has been validated by successful phase II pilot trials in adolescent hypertension and chronic kidney injury. These trails demonstrated that when uric acid levels are decreased, clinically meaningful reduction in hypertension and decrease in progression of chronic kidney injury occurs. • African Queen Mines Ltd. (TSX-V: AQ) (the “Company”) is acquiring all of the issued and outstanding securities of XORTX (a private CBCA company with approximately 38 shareholders) in a reverse take-over, by way of a share exchange agreement. • XORTX will become a wholly-owned subsidiary of the Company, which will change its name to reflect its new business. • In connection with or prior to the Closing, the Company will complete a brokered private placement to raise a minimum CDN $3,000,000 and up to CDN $6,000,000 plus a 20% over-allotment option. 3 Chronically increased Serum Uric Acid is a Multi-modal cause of hypertension. Uric Acid a Novel Mechanism of Action for Hypertension 1) Uric acid- Decreases Endothelial Nitric Oxide Production Nakagawa et al, Am J Physiol 2006; 290:F625-631 2) Uric acid- Increases Renin-Angiotensin-Aldosterone Activation Mazzali et al Hypertension 38:1101-1106, 2001; JASN 2005; 16:35553-3562 3) Uric acid- Increases circulating Insulin concentration VASOCONSTRICTION VASOCONSTRICTION VASOCONSTRICTION Reaven GM, Lithell H, Landsberg L. N Engl J Med. 1996;334(6):374-381. 4) Insulin in absence during Nitric Oxide 5) Uric Acid induces glomerular - kidney injury Mazzali et al, AJP Renal Physiol 282:F991, 2002 VASOCONSTRICTION SALT SENSITIVE HYPERTENSION Conclusion: Uric acid can cause Progressive, Worsening Hypertension Serum Uric Acid “Disease Axis” Non-Clinical Evidence Serum Uric Acid Causes “Disease Axis” Obesity Clinical Evidence Lowering Serum Uric Acid . . . BLOCKS Weight Gain Hypertension Vascular Injury Kidney Injury Salt Sensitive Hypertension Insulin Resistance Diabetes DECREASES High Blood Pressure DECREASES Renal Injury /Diabetic Nephropathy May Decrease Diabetes /Met Syn Insulin Resistance Kidney loss, Blindness, Ischemic limbs 5 The Product Vision: XORLO New Mechanism of Action: Best “first choice” for treatment of Early-Stage Hypertension A Superior Uric Acid Lowering Agent For Controlling Blood Pressure New formulation includes proprietary molecule-Oxypurinol with additives to improve bio availability. 6 A Solution with Strong Clinical Validation And Multiple Therapeutic Indications 1. New Onset Hypertension • 2 Successful Phase II Clinical Trials- Show Uric Acid is a Causative Factor. • Fieg D, et al, JAMA, 300(8):924:2008 • Soletsky B. and Fieg D., Uric Acid Reduction Rectifies Prehypertension in Obese Adolescents, Hypertension 60:1148: 2012 2. Prevention of Diabetes/Insulin Resistance 3. Prevention of Diabetic Nephropathy • 2 Successful Phase II Clinical Trials- Show Uric Acid Drives Injury • Siu YP, et al., Am J Kidney Dis, 47;1;2006 • Goicoechea, M., et al., Clin J Am Soc Nephrol, 5:1388;2010 XORLO is being developed for the indications of Hypertension and Diabetic Nephropathy. 7 Strong Correlation Between High Blood Pressure and Increased Serum Uric Acid in Adolescents Systolic Blood Pressure (mm/Hg) 180 Systolic BP (mm Hg) 160 R= 0.80 Drug Intervention 140 LifeStyle Change 120 100 Feig D and R Johnson Hypertension 2003; 42:247252 80 60 1 2 3 4 5 6 7 8 9 10 Serum Uric Acid (mg/dl) Uric Acid (mg/dl) 8 Randomized Independent Phase II Trial Success in Obese, Hypertensive Adolescents Randomized trial of 60 obese, pre-hypertensive adolescents, treated for 2 months with Allopurinol to determine effect on blood pressure Oxypurinol is a metabolic derivative of Allopurinol. At 2 Months Allopurinol significantly decreased: Uric Acid: -2.4 mg/dL (p=0.0005) SBP: DBP: (p=0.0001) (p=0.0002) -11.8 mmHg - 9.6 mmHg > 80% of individuals whose uric acid was lowered blood pressure was also normalized. Weight: -3.1 kg (p=0.039) (N.B. Placebo Corrected Differences Reported) Soletsky B. and Fieg D., Uric Acid Reduction Prehypertension in Obese Adolescents, Hypertension 60:1148: 2012 9 XORTX Program Milestones (66 Months to NDA) 2014 2015 2016 2017 2019 2018 2020 $6.0 M $18 M License / Sell / Series C XORLO – Early Stage / Type I Hypertension: FDA mtg. Phase II PhII ($3.6 M) Approval Phase III Phase III (if necessary) NDA ($31 M) ($15.2 M) XORLO –Treatment of Diabetic Nephropathy Pivotal Phase III ($ XX,XXX,XXX) XORLO – Treatment of Diabetes/IR/ Met Syn Pivotal Phase III XORTX Operations: ($1.2 M/yr) ($1.2 M/yr) ($1.8 M/yr) ($1.8 M/yr) ($1.8 M/yr) ($1.8 M/yr) ($1.8 M/yr) Patent Portfolio Comprised of 5 Families URIC ACID LOWERING AGENTS (UALA) FDA Approvable Indications: 1- Hypertension: US 7,799,794- Claim Granted “Allopurinol for the treatment of hypertension CIP: “All UALA for Hypertension” Exp-July 2022 2- Treatment of Diabetes / Insulin Resistance: PCT-Worldwide application “Claims all UALA for the treatment of insulin resistance.” Granted in US June 2013- Worldwide pending US ExpSept 2028 3- Treatment of Diabetic Nephropathy: PCT-Worldwide application “Claims all UALA for the treatment of Diabetic Nephropathy” Exp-July 2028 4- Improved Dosing Formulation of Xanthine Oxidase Inhibitor: “Claims All XOI in dosing formulation for treatment of Hypertension, Insulin Resistance, Prevention of Diabetes, Prevention of Diabetic Nephropathy” PCT-Worldwide application, ExpMar 2033 5- Treatment of Metabolic Syndrome: US Patent Application Number 11/995,943 entitled: “Compositions and Methods for Treatment and Treatment of Hyperuricemia Related Health Consequences” Exp-Jan 2028 11 Competitive Analysis: Hypertension Treats Cause Cost to Patient Lowers BP Renal Concern 1’ Side Effect XORLO (UALA) YES SUA, RAAS, Insulin Low YES ++ None Rash ~1% Thiazides (#1) NO Low YES Known Worsens Met Syn RAAS only Modest YES Concern Dry Cough ~20% Worsens Met Syn Contraindicated for hyperuricemia ACEI (#2) RAAS = renin-angiotensin-aldosterone system activation Conclusion • Niche 1: Only 50% of patient have adequately controlled BP, thus need for new MoA (CDC.gov) • Niche 2: Physicians first choice- Thiazides are contraindicated further support for new MoA. (~33% of prescriptions for BP) • Niche 3: Recent evidence suggests ACEI may worsen kidney function. • KEY: Treats cause & does not worsen metabolic syndrome! • Overall XORLO will be ideal first choice therapy (lower BP and prevent kidney injury)! 12 XORLO Target Markets US Market Size (individuals/year): • Adolescent Hypertension: • New Onset Hypertension: ~2.8 million ~63 million • Treatment of: • Diabetic Nephropathy: • Diabetes/ Insulin Resistance: • Metabolic Syndrome –Fatty Liver ~10 million ~86 million ~10 million 13 Strong Management Team Allen Davidoff, Ph.D., CEO and President • • • • Former Co-Founder & CSO of Stem Cell Therapeutics 12 Years Drug Development Experience- Bench to NDA 8 yrs –C Level management experience-CSO, VP- Product Development 2 IND’s – 9 Clinical trials – 1 NDA Jennifer Toddhunter, CFO • Current CFO of African Queen Mines. • Ms. Todhunter has served as VP Financial Administration, and prior to that served as the Finance Manager of both African Queen Mines and it predecessor , Pan African Mining Corp., since May 2005. • 14 yrs. experience with public companies, predominantly those in the mining industry. Irwin Olian, Chairman • Current Chairman and CEO African Queen Mines Ltd. • Founder and served as CEO and Chairman of Pan African Mining Corp. until its acquisition by Asia Thai Mining Co. Ltd. in June 2008. • Co-founder and principal shareholder of North American Scientific, Inc., a Los Angeles based manufacturer of radioisotope products for the treatment of prostate cancer. • Senior Vice President, Investments, with Sutro & Co. Inc., an established investment banking and brokerage firm in San Francisco. • He also served as Vice President of Bear Stearns & Co. Inc. 14 Strong Management Team (Continued) Grace Jung, Ph.D., Director Manufacturing and Synthetic Chemistry • 21 years of experience in drug discovery and development • Former Senior Director of Research (Chemistry) at Cardiome. • Led the chemistry team in the discovery of antiarrhythmic vernakalant. Prior to Cardiome, Grace spent 7 years at Boehringer Ingelheim - medicinal chemist- renin inhibitors as antihypertensive drugs. Brian Mangal, M.Sc., Director Business Development • 12 years of clinical and regulatory development experience. • Formerly Director Biostatistics at Cardiome. • Extensive Clinical , Regulatory and Corporate development experience includes design, analysis and reporting of over 50 clinical trials, three FDA submissions, one TPD submission, a successful EMEA submission and numerous interactions with regulatory authorities and large pharma partner accounts. Alan Moore, Ph.D., Founding Board Member, Executive Consultant : Clinical and Regulatory Affairs • 27 years pharmaceutical development experience with 23 years of senior management experience in pharmaceutical R&D with P&G • Completed 11 investigational new drug ("IND") applications or supplemental IND's, 15 phase I studies, 12 phase II studies, 7 phase III studies and 2 new drug applications. Most recently CEO of BetaStem Inc. Bob Rieder, President and CEO- EssaPharmaceuticals • Current Chairman and Former Co-Founder & CEO Cardiome Pharma • Led successful development of antiarrythmic drug Vernakalant through European Registration & Partnership • 25 yrs –C Level management experience-President, CEO, director 15 Clinical Advisory Board Dr. Richard J. Johnson: Dr. Johnson is Chief of the Division of Renal Diseases and Hypertension at the University of Colorado. Temple Hoyne Buell and NKF of Colorado Endowed Professor of Medicine Chief, Division of Renal Diseases & Hypertension University of Colorado Denver. Dr. Johnson is nationally and internationally renowned for his work on mechanisms of renal injury and progression, including in glomerulonephritis, diabetes, and hypertension. Recent studies have focused on the pathogenesis of essential hypertension and the role of subtle renal injury. He has also performed extensive research on the role of uric acid and fructose in the epidemic of obesity, metabolic syndrome, diabetes, and hypertension. Dr. Daniel Fieg: Dr. Fieg is Director of the Pediatric Hypertension Program and Pediatric Renal Transplant Program at the University of Alabama, Birmingham. He also serves on the steering/planning committee for the hypertension studies being conducted by the Pediatric Trials Network. Dr. William Hiatt: Dr. Hiatt has successfully led CPC as President since 1996. He is a past Chair of the United States Food and Drug Administration (FDA) Cardiovascular and Renal Advisory Committee (2003-08) and currently serves on the Endocrinologic and Metabolic Drugs Advisory Committee. In addition, Dr. Hiatt is the Novartis Foundation endowed professor for cardiovascular research in the Department of Medicine, Division of Cardiology, University of Colorado School of Medicine. 16 The Future The current funding will be utilized to plan, develop and carry-out a Phase II program of FDA clinical trials. This could lead to the following: • Licensing Deal (anticipated as early as 2016-2017) • Acquisition Recent Comparative Post Phase II deals: 2012- $1.26 Billion , AstraZeneca acquired Ardea Lead Product: Uric acid lowering agent for Gout 2009- $900 M , Novartis acquired Speedel Lead Product: Hypertension agent. Average deal value - $1.1 B 17 Potential Pharmaceutical Partners • Takeda Febuxostat • AstraZeneca Lesurinad (repurposed drugs 50%) • GSK Allopurinol • Novartis Hypertension • Merck Hypertension 18 Brokered Private Placement $ 3 million to $ 6 million CAD 12 Million Units @ $0.50 per Unit (Each Unit will be comprised of one common share and one-half of one share purchase warrant entitling the holder to purchase one additional share at an exercise price $0.75 for two years.) Use of Proceeds: API manufacturing Pre-IND FDA, IND, Phase II protocol XORLO Phase II Hypertension Study 19 XORTX Pharma Corp. Proforma Capitalization (Post Merger and Financing) Shares Outstanding: ~ 41,000,000 Options and Warrants Outstanding: ~ 10,550,000 Offering Price: $0.50 CAD Market Cap: $ 20.5 M CAD Management and Insiders approximately 20% Note: These numbers assume the full $ 6 M financing. 20 The XORTX Corporate Highlights 1. KEY Thought Leaders: Dr. Richard Johnson has defined ‘causative’ role of Serum Uric Acid in hypertension, insulin resistance, diabetes, Diabetic Nephropathy. Dr. Will Hiatt former FDA head of Cardio-Renal advisory committee and now advises on the XORTX Scientific Advisory Board. 2. XORTX Controls Intellectual Property Portfolio - claims for five patent families that cover use of “all uric acid lowering agents” for of Hypertension, Insulin Resistance, Metabolic Syndrome, Diabetes Prevention. 3. Strong Management Team - experience in early drug development to market approval, tailored to developing Oxypurinol through New Drug Application (NDA). 4. Lower development costs and faster time to market – pursuing 505(b)(2) FDA Pathway, targeting hypertension market launch possible in 2019. 5. Four Phase II clinical trials validate IP concept: show clinically meaningful and statistically significant effects of lowering serum uric on Early-Stage Hypertension & Progressive Renal Injury. 6. Recent relevant M&A transactions demonstrates market appetite for this therapeutic space and validates the return on investment opportunity. 21 Innovation, Discovery and Practical Solutions for the Management of Hypertension and the Prevention of Diabetes and Diabetic Nephropathy Contact Information: Dr. Allen Davidoff, XORTX Pharma Corp. www.xortx.com adavidoff@xortx.com 1-403-607-2621 22